SkDraw.cpp revision dcd0f3a980095b77ebe605b49777a4bd37ca7b0a
1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com
2ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com/*
3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2006 The Android Open Source Project
4ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com *
5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Use of this source code is governed by a BSD-style license that can be
6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * found in the LICENSE file.
7ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com */
8ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com
98a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkDraw.h"
118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkBlitter.h"
128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkBounder.h"
138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkCanvas.h"
148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkColorPriv.h"
158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkDevice.h"
168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkMaskFilter.h"
178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPaint.h"
188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPathEffect.h"
198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkRasterizer.h"
208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkScan.h"
218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkShader.h"
228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkStroke.h"
238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkTemplatesPriv.h"
2432e5d97ccf60f859db063ebd6e903c362e625767reed@google.com#include "SkTLazy.h"
258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkUtils.h"
268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkAutoKern.h"
288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkBitmapProcShader.h"
298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkDrawProcs.h"
308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//#define TRACE_BITMAP_DRAWS
328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define kBlitterStorageLongCount    (sizeof(SkBitmapProcShader) >> 2)
348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
35fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com/** Helper for allocating small blitters on the stack.
36fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com */
3740c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.comclass SkAutoBlitterChoose : SkNoncopyable {
388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic:
391d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    SkAutoBlitterChoose() {
401d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com        fBlitter = NULL;
411d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    }
428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkAutoBlitterChoose(const SkBitmap& device, const SkMatrix& matrix,
438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        const SkPaint& paint) {
448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fBlitter = SkBlitter::Choose(device, matrix, paint,
458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                     fStorage, sizeof(fStorage));
468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
471d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com
488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    ~SkAutoBlitterChoose();
498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkBlitter*  operator->() { return fBlitter; }
518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkBlitter*  get() const { return fBlitter; }
528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
531d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    void choose(const SkBitmap& device, const SkMatrix& matrix,
541d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com                const SkPaint& paint) {
551d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com        SkASSERT(!fBlitter);
561d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com        fBlitter = SkBlitter::Choose(device, matrix, paint,
571d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com                                     fStorage, sizeof(fStorage));
581d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    }
591d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com
608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate:
618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkBlitter*  fBlitter;
628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    uint32_t    fStorage[kBlitterStorageLongCount];
638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com};
648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comSkAutoBlitterChoose::~SkAutoBlitterChoose() {
668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if ((void*)fBlitter == (void*)fStorage) {
678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fBlitter->~SkBlitter();
688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkDELETE(fBlitter);
708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7340c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com/**
7440c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com *  Since we are providing the storage for the shader (to avoid the perf cost
7540c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com *  of calling new) we insist that in our destructor we can account for all
7640c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com *  owners of the shader.
7740c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com */
7840c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.comclass SkAutoBitmapShaderInstall : SkNoncopyable {
798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic:
8040c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    SkAutoBitmapShaderInstall(const SkBitmap& src, const SkPaint& paint)
8140c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com            : fPaint(paint) /* makes a copy of the paint */ {
8240c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        fPaint.setShader(SkShader::CreateBitmapShader(src,
838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           SkShader::kClamp_TileMode, SkShader::kClamp_TileMode,
848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           fStorage, sizeof(fStorage)));
8540c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        // we deliberately left the shader with an owner-count of 2
8640c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        SkASSERT(2 == fPaint.getShader()->getRefCnt());
878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
8882065d667f64e232bcde2ad849756a6096fcbe6freed@google.com
898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    ~SkAutoBitmapShaderInstall() {
9040c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        SkShader* shader = fPaint.getShader();
9140c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        // since we manually destroy shader, we insist that owners == 2
9240c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        SkASSERT(2 == shader->getRefCnt());
938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
9440c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        fPaint.setShader(NULL); // unref the shader by 1
958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
9640c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        // now destroy to take care of the 2nd owner-count
978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if ((void*)shader == (void*)fStorage) {
988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            shader->~SkShader();
998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
1008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkDELETE(shader);
1018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
1028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
10382065d667f64e232bcde2ad849756a6096fcbe6freed@google.com
10440c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    // return the new paint that has the shader applied
10540c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    const SkPaint& paintWithShader() const { return fPaint; }
10682065d667f64e232bcde2ad849756a6096fcbe6freed@google.com
1078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate:
10840c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    SkPaint     fPaint; // copy of caller's paint (which we then modify)
10940c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    uint32_t    fStorage[kBlitterStorageLongCount];
1108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com};
1118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com///////////////////////////////////////////////////////////////////////////////
1138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
114f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.comSkDraw::SkDraw() {
115f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    sk_bzero(this, sizeof(*this));
116f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com}
117f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com
1188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comSkDraw::SkDraw(const SkDraw& src) {
1198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    memcpy(this, &src, sizeof(*this));
1208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
1218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com///////////////////////////////////////////////////////////////////////////////
1238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtypedef void (*BitmapXferProc)(void* pixels, size_t bytes, uint32_t data);
1258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void D_Clear_BitmapXferProc(void* pixels, size_t bytes, uint32_t) {
1274516f4786f5dda1b86a8f825b9e8e910d9c2363creed@android.com    sk_bzero(pixels, bytes);
1288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
1298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void D_Dst_BitmapXferProc(void*, size_t, uint32_t data) {}
1318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void D32_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) {
1338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    sk_memset32((uint32_t*)pixels, data, bytes >> 2);
1348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
1358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void D16_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) {
1378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    sk_memset16((uint16_t*)pixels, data, bytes >> 1);
1388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
1398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void DA8_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) {
1418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    memset(pixels, data, bytes);
1428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
1438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic BitmapXferProc ChooseBitmapXferProc(const SkBitmap& bitmap,
1458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                           const SkPaint& paint,
1468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                           uint32_t* data) {
1478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // todo: we can apply colorfilter up front if no shader, so we wouldn't
1488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // need to abort this fastpath
1498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.getShader() || paint.getColorFilter()) {
1508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return NULL;
1518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
153845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com    SkXfermode::Mode mode;
154845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com    if (!SkXfermode::IsMode(paint.getXfermode(), &mode)) {
1558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return NULL;
1568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
157a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkColor color = paint.getColor();
159a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // collaps modes based on color...
161845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com    if (SkXfermode::kSrcOver_Mode == mode) {
1628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        unsigned alpha = SkColorGetA(color);
1638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (0 == alpha) {
164845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com            mode = SkXfermode::kDst_Mode;
1658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else if (0xFF == alpha) {
166845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com            mode = SkXfermode::kSrc_Mode;
1678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
1688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
169a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    switch (mode) {
171845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com        case SkXfermode::kClear_Mode:
1728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//            SkDebugf("--- D_Clear_BitmapXferProc\n");
1738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return D_Clear_BitmapXferProc;  // ignore data
174845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com        case SkXfermode::kDst_Mode:
1758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//            SkDebugf("--- D_Dst_BitmapXferProc\n");
1768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return D_Dst_BitmapXferProc;    // ignore data
177845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com        case SkXfermode::kSrc_Mode: {
1788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            /*
179a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com                should I worry about dithering for the lower depths?
1808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            */
1818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkPMColor pmc = SkPreMultiplyColor(color);
1828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            switch (bitmap.config()) {
1838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                case SkBitmap::kARGB_8888_Config:
1848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    if (data) {
1858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        *data = pmc;
1868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
1878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//                    SkDebugf("--- D32_Src_BitmapXferProc\n");
1888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    return D32_Src_BitmapXferProc;
1898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                case SkBitmap::kARGB_4444_Config:
1908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    if (data) {
1918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        *data = SkPixel32ToPixel4444(pmc);
1928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
1938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//                    SkDebugf("--- D16_Src_BitmapXferProc\n");
1948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    return D16_Src_BitmapXferProc;
1958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                case SkBitmap::kRGB_565_Config:
1968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    if (data) {
1978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        *data = SkPixel32ToPixel16(pmc);
1988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
1998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//                    SkDebugf("--- D16_Src_BitmapXferProc\n");
2008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    return D16_Src_BitmapXferProc;
2018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                case SkBitmap::kA8_Config:
2028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    if (data) {
2038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        *data = SkGetPackedA32(pmc);
2048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
2058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//                    SkDebugf("--- DA8_Src_BitmapXferProc\n");
2068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    return DA8_Src_BitmapXferProc;
2078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                default:
2088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    break;
2098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
2108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            break;
2118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
2128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        default:
2138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            break;
2148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return NULL;
2168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
2178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void CallBitmapXferProc(const SkBitmap& bitmap, const SkIRect& rect,
2198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                               BitmapXferProc proc, uint32_t procData) {
2208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int shiftPerPixel;
2218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    switch (bitmap.config()) {
2228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        case SkBitmap::kARGB_8888_Config:
2238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            shiftPerPixel = 2;
2248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            break;
2258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        case SkBitmap::kARGB_4444_Config:
2268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        case SkBitmap::kRGB_565_Config:
2278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            shiftPerPixel = 1;
2288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            break;
2298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        case SkBitmap::kA8_Config:
2308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            shiftPerPixel = 0;
2318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            break;
2328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        default:
2338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkASSERT(!"Can't use xferproc on this config");
2348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return;
2358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    uint8_t* pixels = (uint8_t*)bitmap.getPixels();
2388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(pixels);
2398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const size_t rowBytes = bitmap.rowBytes();
2408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const int widthBytes = rect.width() << shiftPerPixel;
2418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // skip down to the first scanline and X position
2438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    pixels += rect.fTop * rowBytes + (rect.fLeft << shiftPerPixel);
2448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int scans = rect.height() - 1; scans >= 0; --scans) {
2458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        proc(pixels, widthBytes, procData);
2468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        pixels += rowBytes;
2478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
2498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawPaint(const SkPaint& paint) const {
251f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkDEBUGCODE(this->validate();)
2528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (fClip->isEmpty()) {
2548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
2558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkIRect    devRect;
2588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    devRect.set(0, 0, fBitmap->width(), fBitmap->height());
2598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (fBounder && !fBounder->doIRect(devRect)) {
2608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
2618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
262a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
2638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    /*  If we don't have a shader (i.e. we're just a solid color) we may
2648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        be faster to operate directly on the device bitmap, rather than invoking
2658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        a blitter. Esp. true for xfermodes, which require a colorshader to be
2668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        present, which is just redundant work. Since we're drawing everywhere
2678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        in the clip, we don't have to worry about antialiasing.
2688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    */
2698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    uint32_t procData = 0;  // to avoid the warning
2708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    BitmapXferProc proc = ChooseBitmapXferProc(*fBitmap, paint, &procData);
2718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (proc) {
2728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (D_Dst_BitmapXferProc == proc) { // nothing to do
2738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return;
2748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
275a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
2768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkRegion::Iterator iter(*fClip);
2778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        while (!iter.done()) {
2788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            CallBitmapXferProc(*fBitmap, iter.rect(), proc, procData);
2798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            iter.next();
2808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
2818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
2828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // normal case: use a blitter
2838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
2848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScan::FillIRect(devRect, fClip, blitter.get());
2858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
2878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com///////////////////////////////////////////////////////////////////////////////
2898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstruct PtProcRec {
2918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkCanvas::PointMode fMode;
2928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkPaint*  fPaint;
2938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkRegion* fClip;
294a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
2958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // computed values
2968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkFixed fRadius;
297a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
2988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    typedef void (*Proc)(const PtProcRec&, const SkPoint devPts[], int count,
2998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                         SkBlitter*);
3008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bool init(SkCanvas::PointMode, const SkPaint&, const SkMatrix* matrix,
302a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com              const SkRegion* clip);
3038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    Proc chooseProc(SkBlitter* blitter);
3048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com};
3058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void bw_pt_rect_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
3078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                 int count, SkBlitter* blitter) {
3088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(rec.fClip->isRect());
3098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkIRect& r = rec.fClip->getBounds();
310a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
3118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i++) {
3128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int x = SkScalarFloor(devPts[i].fX);
3138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int y = SkScalarFloor(devPts[i].fY);
3148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (r.contains(x, y)) {
3158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            blitter->blitH(x, y, 1);
3168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
3178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
3188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
3198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void bw_pt_rect_16_hair_proc(const PtProcRec& rec,
3218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                    const SkPoint devPts[], int count,
3228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                    SkBlitter* blitter) {
3238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(rec.fClip->isRect());
3248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkIRect& r = rec.fClip->getBounds();
3258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    uint32_t value;
3268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkBitmap* bitmap = blitter->justAnOpaqueColor(&value);
3278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(bitmap);
328a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
3298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    uint16_t* addr = bitmap->getAddr16(0, 0);
3308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int rb = bitmap->rowBytes();
3318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i++) {
3338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int x = SkScalarFloor(devPts[i].fX);
3348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int y = SkScalarFloor(devPts[i].fY);
3358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (r.contains(x, y)) {
3368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//            *bitmap->getAddr16(x, y) = SkToU16(value);
3378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            ((uint16_t*)((char*)addr + y * rb))[x] = SkToU16(value);
3388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
3398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
3408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
3418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void bw_pt_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
3438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                            int count, SkBlitter* blitter) {
3448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i++) {
3458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int x = SkScalarFloor(devPts[i].fX);
3468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int y = SkScalarFloor(devPts[i].fY);
3478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (rec.fClip->contains(x, y)) {
3488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            blitter->blitH(x, y, 1);
3498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
3508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
3518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
3528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void bw_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
3548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                              int count, SkBlitter* blitter) {
3558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i += 2) {
3568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScan::HairLine(devPts[i], devPts[i+1], rec.fClip, blitter);
3578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
3588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
3598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void bw_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
3618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                              int count, SkBlitter* blitter) {
3628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count - 1; i++) {
3638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScan::HairLine(devPts[i], devPts[i+1], rec.fClip, blitter);
3648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
3658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
3668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// aa versions
3688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void aa_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
3708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                              int count, SkBlitter* blitter) {
3718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i += 2) {
3728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScan::AntiHairLine(devPts[i], devPts[i+1], rec.fClip, blitter);
3738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
3748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
3758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void aa_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[],
3778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                              int count, SkBlitter* blitter) {
3788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count - 1; i++) {
3798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScan::AntiHairLine(devPts[i], devPts[i+1], rec.fClip, blitter);
3808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
3818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
3828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// square procs (strokeWidth > 0 but matrix is square-scale (sx == sy)
3848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
3858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void bw_square_proc(const PtProcRec& rec, const SkPoint devPts[],
3868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           int count, SkBlitter* blitter) {
3878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkFixed radius = rec.fRadius;
3888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i++) {
3898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkFixed x = SkScalarToFixed(devPts[i].fX);
3908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkFixed y = SkScalarToFixed(devPts[i].fY);
391a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
3928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkXRect r;
3938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.fLeft = x - radius;
3948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.fTop = y - radius;
3958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.fRight = x + radius;
3968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.fBottom = y + radius;
397a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
3988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScan::FillXRect(r, rec.fClip, blitter);
3998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
4008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
4018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
4028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void aa_square_proc(const PtProcRec& rec, const SkPoint devPts[],
4038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           int count, SkBlitter* blitter) {
4048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkFixed radius = rec.fRadius;
4058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i++) {
4068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkFixed x = SkScalarToFixed(devPts[i].fX);
4078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkFixed y = SkScalarToFixed(devPts[i].fY);
408a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
4098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkXRect r;
4108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.fLeft = x - radius;
4118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.fTop = y - radius;
4128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.fRight = x + radius;
4138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.fBottom = y + radius;
414a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
4158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScan::AntiFillXRect(r, rec.fClip, blitter);
4168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
4178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
4188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
419b4f404ac4195e5b1f49e49c591bd69f98b246f9breed@android.com// If this guy returns true, then chooseProc() must return a valid proc
4208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool PtProcRec::init(SkCanvas::PointMode mode, const SkPaint& paint,
4218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                     const SkMatrix* matrix, const SkRegion* clip) {
4228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.getPathEffect()) {
4238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
4248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
4258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar width = paint.getStrokeWidth();
4268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (0 == width) {
4278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fMode = mode;
4288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fPaint = &paint;
4298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fClip = clip;
4308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fRadius = SK_Fixed1 >> 1;
4318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return true;
4328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
433b4f404ac4195e5b1f49e49c591bd69f98b246f9breed@android.com    if (paint.getStrokeCap() != SkPaint::kRound_Cap &&
434b4f404ac4195e5b1f49e49c591bd69f98b246f9breed@android.com            matrix->rectStaysRect() && SkCanvas::kPoints_PointMode == mode) {
4358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScalar sx = matrix->get(SkMatrix::kMScaleX);
4368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScalar sy = matrix->get(SkMatrix::kMScaleY);
4378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (SkScalarNearlyZero(sx - sy)) {
4388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (sx < 0) {
4398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                sx = -sx;
4408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
4418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
4428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fMode = mode;
4438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fPaint = &paint;
4448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fClip = clip;
4458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fRadius = SkScalarToFixed(SkScalarMul(width, sx)) >> 1;
4468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return true;
4478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
4488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
4498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return false;
4508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
4518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
4528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comPtProcRec::Proc PtProcRec::chooseProc(SkBlitter* blitter) {
453b4f404ac4195e5b1f49e49c591bd69f98b246f9breed@android.com    Proc proc = NULL;
454a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
4558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // for our arrays
4568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(0 == SkCanvas::kPoints_PointMode);
4578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(1 == SkCanvas::kLines_PointMode);
4588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(2 == SkCanvas::kPolygon_PointMode);
4598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT((unsigned)fMode <= (unsigned)SkCanvas::kPolygon_PointMode);
4608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
4618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // first check for hairlines
4628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (0 == fPaint->getStrokeWidth()) {
4638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (fPaint->isAntiAlias()) {
4648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            static const Proc gAAProcs[] = {
4658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                aa_square_proc, aa_line_hair_proc, aa_poly_hair_proc
4668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            };
4678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            proc = gAAProcs[fMode];
4688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
4698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (SkCanvas::kPoints_PointMode == fMode && fClip->isRect()) {
4708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                uint32_t value;
4718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                const SkBitmap* bm = blitter->justAnOpaqueColor(&value);
4728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                if (bm && bm->config() == SkBitmap::kRGB_565_Config) {
4738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    proc = bw_pt_rect_16_hair_proc;
4748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                } else {
4758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    proc = bw_pt_rect_hair_proc;
4768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                }
4778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            } else {
4788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                static Proc gBWProcs[] = {
4798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    bw_pt_hair_proc, bw_line_hair_proc, bw_poly_hair_proc
4808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                };
4818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                proc = gBWProcs[fMode];
4828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
4838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
484b4f404ac4195e5b1f49e49c591bd69f98b246f9breed@android.com    } else if (fPaint->getStrokeCap() != SkPaint::kRound_Cap) {
4858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkASSERT(SkCanvas::kPoints_PointMode == fMode);
4868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (fPaint->isAntiAlias()) {
4878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            proc = aa_square_proc;
4888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
4898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            proc = bw_square_proc;
4908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
4918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
4928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return proc;
4938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
4948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
4958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic bool bounder_points(SkBounder* bounder, SkCanvas::PointMode mode,
4968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           size_t count, const SkPoint pts[],
4978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           const SkPaint& paint, const SkMatrix& matrix) {
4988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkIRect ibounds;
4998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkRect bounds;
5008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar inset = paint.getStrokeWidth();
5018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
5028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bounds.set(pts, count);
5038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bounds.inset(-inset, -inset);
5048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    matrix.mapRect(&bounds);
5058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
5068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bounds.roundOut(&ibounds);
5078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return bounder->doIRect(ibounds);
5088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
5098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
5108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// each of these costs 8-bytes of stack space, so don't make it too large
5118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// must be even for lines/polygon to work
5128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define MAX_DEV_PTS     32
5138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
5148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawPoints(SkCanvas::PointMode mode, size_t count,
515f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        const SkPoint pts[], const SkPaint& paint,
516f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        bool forceUseDevice) const {
5178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // if we're in lines mode, force count to be even
5188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (SkCanvas::kLines_PointMode == mode) {
5198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        count &= ~(size_t)1;
5208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
5218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
5228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if ((long)count <= 0) {
5238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
5248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
525a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
5268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(pts != NULL);
527f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkDEBUGCODE(this->validate();)
528a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
5298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com     // nothing to draw
530dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com    if (fClip->isEmpty()) {
5318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
5328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
5338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
534fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com    if (fBounder) {
535fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com        if (!bounder_points(fBounder, mode, count, pts, paint, *fMatrix)) {
536fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com            return;
537fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com        }
538fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com
539fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com        // clear the bounder and call this again, so we don't invoke the bounder
540fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com        // later if we happen to call ourselves for drawRect, drawPath, etc.
541fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com        SkDraw noBounder(*this);
542fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com        noBounder.fBounder = NULL;
543fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com        noBounder.drawPoints(mode, count, pts, paint, forceUseDevice);
544fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com        return;
545fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com    }
546fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com
5478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    PtProcRec rec;
548f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    if (!forceUseDevice && rec.init(mode, paint, fMatrix, fClip)) {
5498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
5508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
5518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkPoint             devPts[MAX_DEV_PTS];
5528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        const SkMatrix*     matrix = fMatrix;
5538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkBlitter*          bltr = blitter.get();
5548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        PtProcRec::Proc     proc = rec.chooseProc(bltr);
5558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // we have to back up subsequent passes if we're in polygon mode
5568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        const size_t backup = (SkCanvas::kPolygon_PointMode == mode);
557a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
5588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        do {
5598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            size_t n = count;
5608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (n > MAX_DEV_PTS) {
5618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                n = MAX_DEV_PTS;
5628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
5638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            matrix->mapPoints(devPts, pts, n);
5648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            proc(rec, devPts, n, bltr);
5658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            pts += n - backup;
5668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkASSERT(count >= n);
5678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            count -= n;
5688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (count > 0) {
5698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                count += backup;
5708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
5718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } while (count != 0);
5728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
5738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        switch (mode) {
5748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            case SkCanvas::kPoints_PointMode: {
5758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                // temporarily mark the paint as filling.
57640c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                SkPaint newPaint(paint);
57740c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                newPaint.setStyle(SkPaint::kFill_Style);
5788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
57940c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                SkScalar width = newPaint.getStrokeWidth();
5808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkScalar radius = SkScalarHalf(width);
581a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
58240c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                if (newPaint.getStrokeCap() == SkPaint::kRound_Cap) {
5838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    SkPath      path;
5848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    SkMatrix    preMatrix;
585a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
5868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    path.addCircle(0, 0, radius);
5878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    for (size_t i = 0; i < count; i++) {
5888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        preMatrix.setTranslate(pts[i].fX, pts[i].fY);
5898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        // pass true for the last point, since we can modify
5908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        // then path then
591f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        if (fDevice) {
59240c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                            fDevice->drawPath(*this, path, newPaint, &preMatrix,
593f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                                              (count-1) == i);
594f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        } else {
59540c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                            this->drawPath(path, newPaint, &preMatrix,
59640c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                                           (count-1) == i);
597f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        }
5988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
5998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                } else {
6008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    SkRect  r;
601a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
6028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    for (size_t i = 0; i < count; i++) {
6038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        r.fLeft = pts[i].fX - radius;
6048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        r.fTop = pts[i].fY - radius;
6058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        r.fRight = r.fLeft + width;
6068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        r.fBottom = r.fTop + width;
607f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        if (fDevice) {
60840c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                            fDevice->drawRect(*this, r, newPaint);
609f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        } else {
61040c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                            this->drawRect(r, newPaint);
611f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        }
6128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
6138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                }
6148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                break;
6158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
6168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            case SkCanvas::kLines_PointMode:
6178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            case SkCanvas::kPolygon_PointMode: {
6188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                count -= 1;
6198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkPath path;
6208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkPaint p(paint);
6218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                p.setStyle(SkPaint::kStroke_Style);
6228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                size_t inc = (SkCanvas::kLines_PointMode == mode) ? 2 : 1;
6238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                for (size_t i = 0; i < count; i += inc) {
6248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    path.moveTo(pts[i]);
6258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    path.lineTo(pts[i+1]);
626f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    if (fDevice) {
627f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        fDevice->drawPath(*this, path, p, NULL, true);
628f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    } else {
629f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        this->drawPath(path, p, NULL, true);
630f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    }
6318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    path.rewind();
6328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                }
6338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                break;
6348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
6358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
6368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
6378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
6388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
6398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic inline SkPoint* as_lefttop(SkRect* r) {
6408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return (SkPoint*)(void*)r;
6418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
6428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
6438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic inline SkPoint* as_rightbottom(SkRect* r) {
6448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return ((SkPoint*)(void*)r) + 1;
6458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
6468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
647761fb62b0eb174783316d2a8b933fba896ca6355reed@google.comstatic bool easy_rect_join(const SkPaint& paint, const SkMatrix& matrix,
648761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com                           SkPoint* strokeSize) {
649761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com    if (SkPaint::kMiter_Join != paint.getStrokeJoin() ||
650761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com        paint.getStrokeMiter() < SK_ScalarSqrt2) {
651761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com        return false;
652761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com    }
65362ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com
654761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com    SkASSERT(matrix.rectStaysRect());
655761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com    SkPoint pt = { paint.getStrokeWidth(), paint.getStrokeWidth() };
656761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com    matrix.mapVectors(strokeSize, &pt, 1);
6576115338c59799b4ef09cda187f23867dea093f6ereed@google.com    strokeSize->fX = SkScalarAbs(strokeSize->fX);
6586115338c59799b4ef09cda187f23867dea093f6ereed@google.com    strokeSize->fY = SkScalarAbs(strokeSize->fY);
659761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com    return true;
6607ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org}
6617ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org
66262ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.comSkDraw::RectType SkDraw::ComputeRectType(const SkPaint& paint,
66362ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com                                         const SkMatrix& matrix,
66462ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com                                         SkPoint* strokeSize) {
6657ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    RectType rtype;
6667ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    const SkScalar width = paint.getStrokeWidth();
66762ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    const bool zeroWidth = (0 == width);
6687ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    SkPaint::Style style = paint.getStyle();
66962ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com
6707ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    if ((SkPaint::kStrokeAndFill_Style == style) && zeroWidth) {
6717ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        style = SkPaint::kFill_Style;
6727ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    }
67362ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com
6748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.getPathEffect() || paint.getMaskFilter() ||
67562ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com        paint.getRasterizer() || !matrix.rectStaysRect() ||
6767ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        SkPaint::kStrokeAndFill_Style == style) {
67762ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com        rtype = kPath_RectType;
67862ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    } else if (SkPaint::kFill_Style == style) {
6797ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        rtype = kFill_RectType;
6807ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    } else if (zeroWidth) {
6817ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        rtype = kHair_RectType;
68262ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    } else if (easy_rect_join(paint, matrix, strokeSize)) {
6837ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        rtype = kStroke_RectType;
6847ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    } else {
6857ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        rtype = kPath_RectType;
6867ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    }
68762ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    return rtype;
68862ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com}
68962ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com
69040c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.comstatic SkPoint* rect_points(SkRect& r, int index) {
69140c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    SkASSERT((unsigned)index < 2);
69240c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    return &((SkPoint*)(void*)&r)[index];
69340c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com}
69440c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com
69562ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.comvoid SkDraw::drawRect(const SkRect& rect, const SkPaint& paint) const {
69662ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    SkDEBUGCODE(this->validate();)
6977ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org
69862ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    // nothing to draw
699dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com    if (fClip->isEmpty()) {
70062ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com        return;
70162ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    }
70262ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com
70362ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    SkPoint strokeSize;
70462ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    RectType rtype = ComputeRectType(paint, *fMatrix, &strokeSize);
70562ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com
70662ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com#ifdef SK_DISABLE_FAST_AA_STROKE_RECT
70762ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    if (kStroke_RectType == rtype && paint.isAntiAlias()) {
70862ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com        rtype = kPath_RectType;
70962ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com    }
71062ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com#endif
71162ab7addb06bbc5b93460eaf2f70a9f8399308d3reed@google.com
7127ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    if (kPath_RectType == rtype) {
7138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkPath  tmp;
7148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        tmp.addRect(rect);
7158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        tmp.setFillType(SkPath::kWinding_FillType);
716187d5595901d1120d9425851e5afdd773f574502reed@android.com        this->drawPath(tmp, paint, NULL, true);
7178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
7188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
7198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkMatrix& matrix = *fMatrix;
7218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkRect          devRect;
7228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // transform rect into devRect
7248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    {
7258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        matrix.mapXY(rect.fLeft, rect.fTop, rect_points(devRect, 0));
7268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        matrix.mapXY(rect.fRight, rect.fBottom, rect_points(devRect, 1));
7278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        devRect.sort();
7288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
7298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (fBounder && !fBounder->doRect(devRect, paint)) {
7318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
7328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
7338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // look for the quick exit, before we build a blitter
7358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    {
7368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkIRect ir;
7378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        devRect.roundOut(&ir);
73855e76b209c9249308a9ba3d75c2472dd55e9d298reed@android.com        if (paint.getStyle() != SkPaint::kFill_Style) {
73955e76b209c9249308a9ba3d75c2472dd55e9d298reed@android.com            // extra space for hairlines
74055e76b209c9249308a9ba3d75c2472dd55e9d298reed@android.com            ir.inset(-1, -1);
74155e76b209c9249308a9ba3d75c2472dd55e9d298reed@android.com        }
7428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (fClip->quickReject(ir))
7438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return;
7448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
7458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkAutoBlitterChoose blitterStorage(*fBitmap, matrix, paint);
7478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkBlitter*          blitter = blitterStorage.get();
7488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkRegion*     clip = fClip;
7498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
750b641c9f20beb36dbf4e8df53a199c84cef3be9b2reed@android.com    // we want to "fill" if we are kFill or kStrokeAndFill, since in the latter
751b641c9f20beb36dbf4e8df53a199c84cef3be9b2reed@android.com    // case we are also hairline (if we've gotten to here), which devolves to
752b641c9f20beb36dbf4e8df53a199c84cef3be9b2reed@android.com    // effectively just kFill
7537ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org    switch (rtype) {
7547ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        case kFill_RectType:
7557ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            if (paint.isAntiAlias()) {
7567ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org                SkScan::AntiFillRect(devRect, clip, blitter);
7577ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            } else {
7587ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org                SkScan::FillRect(devRect, clip, blitter);
7597ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            }
7607ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            break;
7617ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        case kStroke_RectType:
7627ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            if (paint.isAntiAlias()) {
763761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com                SkScan::AntiFrameRect(devRect, strokeSize, clip, blitter);
7647ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            } else {
765761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com                SkScan::FrameRect(devRect, strokeSize, clip, blitter);
7667ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            }
7677ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            break;
7687ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        case kHair_RectType:
7697ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            if (paint.isAntiAlias()) {
7707ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org                SkScan::AntiHairRect(devRect, clip, blitter);
7717ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            } else {
7727ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org                SkScan::HairRect(devRect, clip, blitter);
7737ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            }
7747ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            break;
7757ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org        default:
7767ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org            SkASSERT(!"bad rtype");
7778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
7788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
7798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawDevMask(const SkMask& srcM, const SkPaint& paint) const {
7818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (srcM.fBounds.isEmpty()) {
7828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
7838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
7848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7850a60b3d32eae945688b69599f11679662657f751bungeman@google.com    const SkMask* mask = &srcM;
7868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7870a60b3d32eae945688b69599f11679662657f751bungeman@google.com    SkMask dstM;
7888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.getMaskFilter() &&
7898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            paint.getMaskFilter()->filterMask(&dstM, srcM, *fMatrix, NULL)) {
7908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask = &dstM;
791bf2ac7e52f84095368dc50600fd6e78cc96044e3bungeman@google.com    } else {
792bf2ac7e52f84095368dc50600fd6e78cc96044e3bungeman@google.com        dstM.fImage = NULL;
7938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
7940a60b3d32eae945688b69599f11679662657f751bungeman@google.com    SkAutoMaskImage ami(&dstM, false);
7958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
7968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (fBounder && !fBounder->doIRect(mask->fBounds)) {
7978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
7988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
7998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
8008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint);
8018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
8028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    blitter->blitMaskRegion(*mask, *fClip);
8038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
8048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
805ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.comstatic SkScalar fast_len(const SkVector& vec) {
806ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    SkScalar x = SkScalarAbs(vec.fX);
807ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    SkScalar y = SkScalarAbs(vec.fY);
808ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    if (x < y) {
809ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com        SkTSwap(x, y);
810ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    }
811ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    return x + SkScalarHalf(y);
812ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com}
813ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com
814ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.comstatic bool xfermodeSupportsCoverageAsAlpha(SkXfermode* xfer) {
815ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    SkXfermode::Coeff dc;
816ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    if (!SkXfermode::AsCoeff(xfer, NULL, &dc)) {
817ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        return false;
818ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    }
819ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com
820ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    switch (dc) {
821ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        case SkXfermode::kOne_Coeff:
822ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        case SkXfermode::kISA_Coeff:
823ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        case SkXfermode::kISC_Coeff:
824ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com            return true;
825ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        default:
826ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com            return false;
827ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    }
828ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com}
829ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com
830ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.combool SkDrawTreatAsHairline(const SkPaint& paint, const SkMatrix& matrix,
831ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com                           SkAlpha* newAlpha) {
832ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    SkASSERT(newAlpha);
833ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    if (SkPaint::kStroke_Style != paint.getStyle()) {
834ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        return false;
835ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    }
836ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    SkScalar strokeWidth = paint.getStrokeWidth();
837ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    if (0 == strokeWidth) {
838ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        *newAlpha = paint.getAlpha();
839ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        return true;
840ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    }
841ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com
842ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    // if we get here, we need to try to fake a thick-stroke with a modulated
843ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    // hairline
844ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com
845ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    if (!paint.isAntiAlias()) {
846ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        return false;
847ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    }
848ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    if (!xfermodeSupportsCoverageAsAlpha(paint.getXfermode())) {
849ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        return false;
850ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    }
8518d430185e08d2067584837a76b7193b803fee7a0tomhudson@google.com    if (matrix.hasPerspective()) {
852ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com        return false;
853ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    }
854ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com
855ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    SkVector src[2], dst[2];
856ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    src[0].set(strokeWidth, 0);
857ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    src[1].set(0, strokeWidth);
858ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    matrix.mapVectors(dst, src, 2);
859ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    SkScalar len0 = fast_len(dst[0]);
860ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    SkScalar len1 = fast_len(dst[1]);
861652807bbc8c57e5fa9622126b51fd369f5c67935agl@chromium.org    if (len0 <= SK_Scalar1 && len1 <= SK_Scalar1) {
862ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        SkScalar modulate = SkScalarAve(len0, len1);
8636a87fafc5ce0d7fdf1decf8bb9dd6942f2433addreed@google.com#if 0
864ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        *newAlpha = SkToU8(SkScalarRoundToInt(modulate * paint.getAlpha()));
8656a87fafc5ce0d7fdf1decf8bb9dd6942f2433addreed@google.com#else
8666a87fafc5ce0d7fdf1decf8bb9dd6942f2433addreed@google.com        // this is the old technique, which we preserve for now so we don't
8676a87fafc5ce0d7fdf1decf8bb9dd6942f2433addreed@google.com        // change previous results (testing)
8686a87fafc5ce0d7fdf1decf8bb9dd6942f2433addreed@google.com        // the new way seems fine, its just (a tiny bit) different
8696a87fafc5ce0d7fdf1decf8bb9dd6942f2433addreed@google.com        int scale = (int)SkScalarMul(modulate, 256);
8706a87fafc5ce0d7fdf1decf8bb9dd6942f2433addreed@google.com        *newAlpha = paint.getAlpha() * scale >> 8;
8716a87fafc5ce0d7fdf1decf8bb9dd6942f2433addreed@google.com#endif
872ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com        return true;
873ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    }
874ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com    return false;
875ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com}
876ebdeeb8a018f2df01e190fd961d68a94f0e0fcb9reed@android.com
87732e5d97ccf60f859db063ebd6e903c362e625767reed@google.comvoid SkDraw::drawPath(const SkPath& origSrcPath, const SkPaint& origPaint,
8788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                      const SkMatrix* prePathMatrix, bool pathIsMutable) const {
879f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkDEBUGCODE(this->validate();)
8808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
8818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // nothing to draw
882dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com    if (fClip->isEmpty()) {
8838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
8848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
8858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
8868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPath*         pathPtr = (SkPath*)&origSrcPath;
8878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bool            doFill = true;
8888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPath          tmpPath;
8898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix        tmpMatrix;
8908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkMatrix* matrix = fMatrix;
8918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
8928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (prePathMatrix) {
89332e5d97ccf60f859db063ebd6e903c362e625767reed@google.com        if (origPaint.getPathEffect() || origPaint.getStyle() != SkPaint::kFill_Style ||
89432e5d97ccf60f859db063ebd6e903c362e625767reed@google.com                origPaint.getRasterizer()) {
8958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkPath* result = pathPtr;
896a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
8978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (!pathIsMutable) {
8988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                result = &tmpPath;
8998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                pathIsMutable = true;
9008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
9018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            pathPtr->transform(*prePathMatrix, result);
9028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            pathPtr = result;
9038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
9048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (!tmpMatrix.setConcat(*matrix, *prePathMatrix)) {
9058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                // overflow
9068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                return;
9078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
9088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            matrix = &tmpMatrix;
9098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
9108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
9118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // at this point we're done with prePathMatrix
9128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;)
913a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
91432e5d97ccf60f859db063ebd6e903c362e625767reed@google.com    const SkPaint* paint = &origPaint;
91532e5d97ccf60f859db063ebd6e903c362e625767reed@google.com    SkTLazy<SkPaint> lazyPaint;
916a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
917ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com    {
918ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        SkAlpha newAlpha;
919ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com        if (SkDrawTreatAsHairline(origPaint, *matrix, &newAlpha)) {
92032e5d97ccf60f859db063ebd6e903c362e625767reed@google.com            lazyPaint.set(origPaint);
921ecadf99c8450646dfd9c2754f3e845245beab8b6reed@google.com            lazyPaint.get()->setAlpha(newAlpha);
92232e5d97ccf60f859db063ebd6e903c362e625767reed@google.com            lazyPaint.get()->setStrokeWidth(0);
92332e5d97ccf60f859db063ebd6e903c362e625767reed@google.com            paint = lazyPaint.get();
9248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
9258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
926a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
92732e5d97ccf60f859db063ebd6e903c362e625767reed@google.com    if (paint->getPathEffect() || paint->getStyle() != SkPaint::kFill_Style) {
92832e5d97ccf60f859db063ebd6e903c362e625767reed@google.com        doFill = paint->getFillPath(*pathPtr, &tmpPath);
9298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        pathPtr = &tmpPath;
9308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
931a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
93232e5d97ccf60f859db063ebd6e903c362e625767reed@google.com    if (paint->getRasterizer()) {
9338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkMask  mask;
93432e5d97ccf60f859db063ebd6e903c362e625767reed@google.com        if (paint->getRasterizer()->rasterize(*pathPtr, *matrix,
93532e5d97ccf60f859db063ebd6e903c362e625767reed@google.com                            &fClip->getBounds(), paint->getMaskFilter(), &mask,
9368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                            SkMask::kComputeBoundsAndRenderImage_CreateMode)) {
93732e5d97ccf60f859db063ebd6e903c362e625767reed@google.com            this->drawDevMask(mask, *paint);
9388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkMask::FreeImage(mask.fImage);
9398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
9408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
9418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
9428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
9438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // avoid possibly allocating a new path in transform if we can
9448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPath* devPathPtr = pathIsMutable ? pathPtr : &tmpPath;
9458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
9468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // transform the path into device space
9478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    pathPtr->transform(*matrix, devPathPtr);
9488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
94932e5d97ccf60f859db063ebd6e903c362e625767reed@google.com    SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, *paint);
9508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
9518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // how does filterPath() know to fill or hairline the path??? <mrr>
95232e5d97ccf60f859db063ebd6e903c362e625767reed@google.com    if (paint->getMaskFilter() &&
95332e5d97ccf60f859db063ebd6e903c362e625767reed@google.com            paint->getMaskFilter()->filterPath(*devPathPtr, *fMatrix, *fClip,
95432e5d97ccf60f859db063ebd6e903c362e625767reed@google.com                                               fBounder, blitter.get())) {
9558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return; // filterPath() called the blitter, so we're done
9568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
9578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
95832e5d97ccf60f859db063ebd6e903c362e625767reed@google.com    if (fBounder && !fBounder->doPath(*devPathPtr, *paint, doFill)) {
9598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
9608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
9618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
9628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (doFill) {
96332e5d97ccf60f859db063ebd6e903c362e625767reed@google.com        if (paint->isAntiAlias()) {
9648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkScan::AntiFillPath(*devPathPtr, *fClip, blitter.get());
9658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
9668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkScan::FillPath(*devPathPtr, *fClip, blitter.get());
9678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
9688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {    // hairline
96932e5d97ccf60f859db063ebd6e903c362e625767reed@google.com        if (paint->isAntiAlias()) {
9708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkScan::AntiHairPath(*devPathPtr, fClip, blitter.get());
9718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
9728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkScan::HairPath(*devPathPtr, fClip, blitter.get());
9738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
9748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
9758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
9768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
9770baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com/** For the purposes of drawing bitmaps, if a matrix is "almost" translate
9780baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    go ahead and treat it as if it were, so that subsequent code can go fast.
9790baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com */
9800baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.comstatic bool just_translate(const SkMatrix& matrix, const SkBitmap& bitmap) {
9810baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    SkMatrix::TypeMask mask = matrix.getType();
9820baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com
9830baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    if (mask & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) {
9840baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com        return false;
9850baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    }
9860baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    if (mask & SkMatrix::kScale_Mask) {
9870baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com        SkScalar sx = matrix[SkMatrix::kMScaleX];
9880baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com        SkScalar sy = matrix[SkMatrix::kMScaleY];
9890baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com        int w = bitmap.width();
9900baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com        int h = bitmap.height();
9910baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com        int sw = SkScalarRound(SkScalarMul(sx, SkIntToScalar(w)));
9920baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com        int sh = SkScalarRound(SkScalarMul(sy, SkIntToScalar(h)));
9930baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com        return sw == w && sh == h;
9940baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    }
9950baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    // if we got here, we're either kTranslate_Mask or identity
9960baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    return true;
9978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
9988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
9998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawBitmapAsMask(const SkBitmap& bitmap,
10008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                              const SkPaint& paint) const {
10018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(bitmap.getConfig() == SkBitmap::kA8_Config);
10028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1003a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com    if (just_translate(*fMatrix, bitmap)) {
10048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int ix = SkScalarRound(fMatrix->getTranslateX());
10058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int iy = SkScalarRound(fMatrix->getTranslateY());
10068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
10078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkMask  mask;
10088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask.fBounds.set(ix, iy, ix + bitmap.width(), iy + bitmap.height());
10098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask.fFormat = SkMask::kA8_Format;
10108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask.fRowBytes = bitmap.rowBytes();
10118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask.fImage = bitmap.getAddr8(0, 0);
1012a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
10138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        this->drawDevMask(mask, paint);
10148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {    // need to xform the bitmap first
10158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkRect  r;
10168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkMask  mask;
1017a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
10188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.set(0, 0,
10198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com              SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height()));
10208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fMatrix->mapRect(&r);
10218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.round(&mask.fBounds);
1022a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
10238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // set the mask's bounds to the transformed bitmap-bounds,
10248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // clipped to the actual device
10258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        {
10268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkIRect    devBounds;
10278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            devBounds.set(0, 0, fBitmap->width(), fBitmap->height());
10288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            // need intersect(l, t, r, b) on irect
10298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (!mask.fBounds.intersect(devBounds)) {
10308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                return;
10318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
10328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
1033543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com
10348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask.fFormat = SkMask::kA8_Format;
10358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask.fRowBytes = SkAlign4(mask.fBounds.width());
1036543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com        size_t size = mask.computeImageSize();
1037543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com        if (0 == size) {
1038543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com            // the mask is too big to allocated, draw nothing
1039543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com            return;
1040543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com        }
10418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
10428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // allocate (and clear) our temp buffer to hold the transformed bitmap
10438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkAutoMalloc    storage(size);
10448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask.fImage = (uint8_t*)storage.get();
10458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        memset(mask.fImage, 0, size);
1046a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
10478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // now draw our bitmap(src) into mask(dst), transformed by the matrix
10488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        {
10498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkBitmap    device;
10508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            device.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(),
10518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                             mask.fBounds.height(), mask.fRowBytes);
10528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            device.setPixels(mask.fImage);
1053a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
10548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkCanvas c(device);
10558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            // need the unclipped top/left for the translate
10568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            c.translate(-SkIntToScalar(mask.fBounds.fLeft),
10578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        -SkIntToScalar(mask.fBounds.fTop));
10588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            c.concat(*fMatrix);
10593469c76c40790b409621fd7eff34f56240718549reed@android.com
10603469c76c40790b409621fd7eff34f56240718549reed@android.com            // We can't call drawBitmap, or we'll infinitely recurse. Instead
1061fb12c3e6ba84f95dc15fbaddc239dede0ba1d60ereed@android.com            // we manually build a shader and draw that into our new mask
10623469c76c40790b409621fd7eff34f56240718549reed@android.com            SkPaint tmpPaint;
10633469c76c40790b409621fd7eff34f56240718549reed@android.com            tmpPaint.setFlags(paint.getFlags());
106440c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com            SkAutoBitmapShaderInstall install(bitmap, tmpPaint);
10653469c76c40790b409621fd7eff34f56240718549reed@android.com            SkRect rr;
10663469c76c40790b409621fd7eff34f56240718549reed@android.com            rr.set(0, 0, SkIntToScalar(bitmap.width()),
10673469c76c40790b409621fd7eff34f56240718549reed@android.com                   SkIntToScalar(bitmap.height()));
106840c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com            c.drawRect(rr, install.paintWithShader());
10698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
10708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        this->drawDevMask(mask, paint);
10718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
10728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
10738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
10748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic bool clipped_out(const SkMatrix& m, const SkRegion& c,
10758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        const SkRect& srcR) {
10768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkRect  dstR;
10778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkIRect devIR;
1078a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
10798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    m.mapRect(&dstR, srcR);
1080a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com    dstR.roundOut(&devIR);
10818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return c.quickReject(devIR);
10828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
10838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
10848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic bool clipped_out(const SkMatrix& matrix, const SkRegion& clip,
10858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        int width, int height) {
10868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkRect  r;
10878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    r.set(0, 0, SkIntToScalar(width), SkIntToScalar(height));
10888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return clipped_out(matrix, clip, r);
10898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
10908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
10918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawBitmap(const SkBitmap& bitmap, const SkMatrix& prematrix,
109240c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                        const SkPaint& origPaint) const {
1093f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkDEBUGCODE(this->validate();)
10948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
10958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // nothing to draw
10968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (fClip->isEmpty() ||
10978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            bitmap.width() == 0 || bitmap.height() == 0 ||
1098dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com            bitmap.getConfig() == SkBitmap::kNo_Config) {
10998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
11008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1101a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1102a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com#ifndef SK_ALLOW_OVER_32K_BITMAPS
11038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // run away on too-big bitmaps for now (exceed 16.16)
11048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (bitmap.width() > 32767 || bitmap.height() > 32767) {
11058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
11068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1107a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com#endif
1108a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
110940c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    SkPaint paint(origPaint);
111040c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    paint.setStyle(SkPaint::kFill_Style);
1111a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
11128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix matrix;
11138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (!matrix.setConcat(*fMatrix, prematrix)) {
11148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
11158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
11168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (clipped_out(matrix, *fClip, bitmap.width(), bitmap.height())) {
11188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
11198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
11208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1121218521e15706c4377b1be49d931c4d7c8d597445reed@android.com    if (fBounder && just_translate(matrix, bitmap)) {
1122218521e15706c4377b1be49d931c4d7c8d597445reed@android.com        SkIRect ir;
1123218521e15706c4377b1be49d931c4d7c8d597445reed@android.com        int32_t ix = SkScalarRound(matrix.getTranslateX());
1124218521e15706c4377b1be49d931c4d7c8d597445reed@android.com        int32_t iy = SkScalarRound(matrix.getTranslateY());
1125218521e15706c4377b1be49d931c4d7c8d597445reed@android.com        ir.set(ix, iy, ix + bitmap.width(), iy + bitmap.height());
1126218521e15706c4377b1be49d931c4d7c8d597445reed@android.com        if (!fBounder->doIRect(ir)) {
1127218521e15706c4377b1be49d931c4d7c8d597445reed@android.com            return;
1128218521e15706c4377b1be49d931c4d7c8d597445reed@android.com        }
1129218521e15706c4377b1be49d931c4d7c8d597445reed@android.com    }
1130218521e15706c4377b1be49d931c4d7c8d597445reed@android.com
1131218521e15706c4377b1be49d931c4d7c8d597445reed@android.com    // only lock the pixels if we passed the clip and bounder tests
11328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkAutoLockPixels alp(bitmap);
11338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // after the lock, check if we are valid
11348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (!bitmap.readyToDraw()) {
11358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
11368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
11378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11380baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com    if (bitmap.getConfig() != SkBitmap::kA8_Config &&
11390baf19375466cfc24c96532df406e7c5b1d1aae8reed@android.com            just_translate(matrix, bitmap)) {
11408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int         ix = SkScalarRound(matrix.getTranslateX());
11418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int         iy = SkScalarRound(matrix.getTranslateY());
11428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        uint32_t    storage[kBlitterStorageLongCount];
11438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkBlitter*  blitter = SkBlitter::ChooseSprite(*fBitmap, paint, bitmap,
11448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                            ix, iy, storage, sizeof(storage));
11458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (blitter) {
11468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkAutoTPlacementDelete<SkBlitter>   ad(blitter, storage);
11478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkIRect    ir;
11498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            ir.set(ix, iy, ix + bitmap.width(), iy + bitmap.height());
11508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkRegion::Cliperator iter(*fClip, ir);
11528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            const SkIRect&       cr = iter.rect();
11538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            for (; !iter.done(); iter.next()) {
11558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkASSERT(!cr.isEmpty());
11568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                blitter->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height());
11578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
11588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return;
11598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
11608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#if 0
11618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkDebugf("---- MISSING sprite case: config=%d [%d %d], device=%d, xfer=%p, alpha=0x%X colorFilter=%p\n",
11628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                bitmap.config(), bitmap.width(), bitmap.height(), fBitmap->config(),
11638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                paint.getXfermode(), paint.getAlpha(), paint.getColorFilter());
11648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif
11658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1166a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
11678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // now make a temp draw on the stack, and use it
11688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    //
11698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkDraw draw(*this);
11708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    draw.fMatrix = &matrix;
1171a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
11728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (bitmap.getConfig() == SkBitmap::kA8_Config) {
11738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        draw.drawBitmapAsMask(bitmap, paint);
11748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
117540c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        SkAutoBitmapShaderInstall install(bitmap, paint);
11768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkRect  r;
11788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.set(0, 0, SkIntToScalar(bitmap.width()),
11798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com              SkIntToScalar(bitmap.height()));
1180a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com        // is this ok if paint has a rasterizer?
118140c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com        draw.drawRect(r, install.paintWithShader());
11828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
11838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
11848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawSprite(const SkBitmap& bitmap, int x, int y,
118640c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com                        const SkPaint& origPaint) const {
1187f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkDEBUGCODE(this->validate();)
1188a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
11898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // nothing to draw
11908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (fClip->isEmpty() ||
11918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            bitmap.width() == 0 || bitmap.height() == 0 ||
1192dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com            bitmap.getConfig() == SkBitmap::kNo_Config) {
11938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
11948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
11958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkIRect    bounds;
11978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bounds.set(x, y, x + bitmap.width(), y + bitmap.height());
11988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
11998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (fClip->quickReject(bounds)) {
12008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return; // nothing to draw
12018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
12028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
120340c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    SkPaint paint(origPaint);
120440c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    paint.setStyle(SkPaint::kFill_Style);
12058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (NULL == paint.getColorFilter()) {
12078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        uint32_t    storage[kBlitterStorageLongCount];
12088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkBlitter*  blitter = SkBlitter::ChooseSprite(*fBitmap, paint, bitmap,
12098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                                x, y, storage, sizeof(storage));
12108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (blitter) {
12128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkAutoTPlacementDelete<SkBlitter> ad(blitter, storage);
12138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (fBounder && !fBounder->doIRect(bounds)) {
12158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                return;
12168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
12178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkRegion::Cliperator iter(*fClip, bounds);
12198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            const SkIRect&       cr = iter.rect();
12208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            for (; !iter.done(); iter.next()) {
12228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkASSERT(!cr.isEmpty());
12238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                blitter->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height());
12248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
12258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return;
12268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
12278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
12288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
122940c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    SkAutoBitmapShaderInstall install(bitmap, paint);
123040c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    const SkPaint& shaderPaint = install.paintWithShader();
12318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix        matrix;
12338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkRect          r;
12348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // get a scalar version of our rect
12368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    r.set(bounds);
12378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // tell the shader our offset
12398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    matrix.setTranslate(r.fLeft, r.fTop);
124040c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    shaderPaint.getShader()->setLocalMatrix(matrix);
1241a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
12428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkDraw draw(*this);
12438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    matrix.reset();
12448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    draw.fMatrix = &matrix;
12458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // call ourself with a rect
1246a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com    // is this OK if paint has a rasterizer?
124740c2ba27b6e5c6a4b6c073264f8c0a7c86355abereed@google.com    draw.drawRect(r, shaderPaint);
12488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
12498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com///////////////////////////////////////////////////////////////////////////////
12518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkScalerContext.h"
12538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkGlyphCache.h"
12548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkUtils.h"
12558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void measure_text(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc,
12578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                const char text[], size_t byteLength, SkVector* stopVector) {
12588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkFixed     x = 0, y = 0;
12598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const char* stop = text + byteLength;
12608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkAutoKern  autokern;
1262a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
12638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    while (text < stop) {
12648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // don't need x, y here, since all subpixel variants will have the
12658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // same advance
12668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0);
12678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        x += autokern.adjust(glyph) + glyph.fAdvanceX;
12698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        y += glyph.fAdvanceY;
12708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
12718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    stopVector->set(SkFixedToScalar(x), SkFixedToScalar(y));
12728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(text == stop);
12748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
12758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawText_asPaths(const char text[], size_t byteLength,
12778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                              SkScalar x, SkScalar y,
12788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                              const SkPaint& paint) const {
1279f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkDEBUGCODE(this->validate();)
12808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkTextToPathIter iter(text, byteLength, paint, true, true);
12828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix    matrix;
12848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    matrix.setScale(iter.getPathScale(), iter.getPathScale());
12858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    matrix.postTranslate(x, y);
12868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkPath* iterPath;
12888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar xpos, prevXPos = 0;
12898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
12908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    while ((iterPath = iter.next(&xpos)) != NULL) {
12918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        matrix.postTranslate(xpos - prevXPos, 0);
1292f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        const SkPaint& pnt = iter.getPaint();
1293f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        if (fDevice) {
1294f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com            fDevice->drawPath(*this, *iterPath, pnt, &matrix, false);
1295f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        } else {
1296f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com            this->drawPath(*iterPath, pnt, &matrix, false);
1297f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        }
12988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        prevXPos = xpos;
12998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
13008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
13018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// disable warning : local variable used without having been initialized
1303a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com#if defined _WIN32 && _MSC_VER >= 1300
13048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#pragma warning ( push )
13058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#pragma warning ( disable : 4701 )
13068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif
13078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//////////////////////////////////////////////////////////////////////////////
13098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void D1G_NoBounder_RectClip(const SkDraw1Glyph& state,
1311f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                                   SkFixed fx, SkFixed fy,
1312f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                                   const SkGlyph& glyph) {
1313f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    int left = SkFixedFloor(fx);
1314f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    int top = SkFixedFloor(fy);
13158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
13168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkASSERT(state.fClip->isRect());
13178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkASSERT(NULL == state.fBounder);
13188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkASSERT(state.fClipBounds == state.fClip->getBounds());
13198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    left += glyph.fLeft;
13218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    top  += glyph.fTop;
13228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int right   = left + glyph.fWidth;
13248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int bottom  = top + glyph.fHeight;
13258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkMask		mask;
13278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkIRect		storage;
13288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkIRect*	bounds = &mask.fBounds;
13298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	mask.fBounds.set(left, top, right, bottom);
13318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	// this extra test is worth it, assuming that most of the time it succeeds
13338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	// since we can avoid writing to storage
13348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	if (!state.fClipBounds.containsNoEmptyCheck(left, top, right, bottom)) {
13358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		if (!storage.intersectNoEmptyCheck(mask.fBounds, state.fClipBounds))
13368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			return;
13378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		bounds = &storage;
13388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	}
1339a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1340a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com	uint8_t* aa = (uint8_t*)glyph.fImage;
13418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	if (NULL == aa) {
13428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		aa = (uint8_t*)state.fCache->findImage(glyph);
13438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		if (NULL == aa) {
13448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			return; // can't rasterize glyph
13458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
13468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	}
13478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	mask.fRowBytes = glyph.rowBytes();
13496c14b43a840c791699747ba4cc0ed5abf2bda218reed@android.com	mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat);
13508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	mask.fImage = aa;
13518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	state.fBlitter->blitMask(mask, *bounds);
13528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
13538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void D1G_NoBounder_RgnClip(const SkDraw1Glyph& state,
1355f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                                  SkFixed fx, SkFixed fy,
1356f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com								  const SkGlyph& glyph) {
1357f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    int left = SkFixedFloor(fx);
1358f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    int top = SkFixedFloor(fy);
13598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
13608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkASSERT(!state.fClip->isRect());
13618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkASSERT(NULL == state.fBounder);
13628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMask  mask;
13648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    left += glyph.fLeft;
13668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    top  += glyph.fTop;
13678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    mask.fBounds.set(left, top, left + glyph.fWidth, top + glyph.fHeight);
13698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkRegion::Cliperator clipper(*state.fClip, mask.fBounds);
13708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	if (!clipper.done()) {
13728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		const SkIRect&  cr = clipper.rect();
13738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		const uint8_t*  aa = (const uint8_t*)glyph.fImage;
13748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		if (NULL == aa) {
13758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			aa = (uint8_t*)state.fCache->findImage(glyph);
13768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			if (NULL == aa) {
13778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com				return;
13788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
13798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		}
1380a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
13818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		mask.fRowBytes = glyph.rowBytes();
13826c14b43a840c791699747ba4cc0ed5abf2bda218reed@android.com		mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat);
13838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		mask.fImage = (uint8_t*)aa;
13848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		do {
13858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			state.fBlitter->blitMask(mask, cr);
13868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			clipper.next();
13878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		} while (!clipper.done());
13888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	}
13898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
13908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void D1G_Bounder(const SkDraw1Glyph& state,
1392f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                        SkFixed fx, SkFixed fy,
1393f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com						const SkGlyph& glyph) {
1394f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    int left = SkFixedFloor(fx);
1395f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    int top = SkFixedFloor(fy);
13968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
13978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
13988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMask  mask;
13998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    left += glyph.fLeft;
14018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    top  += glyph.fTop;
14028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    mask.fBounds.set(left, top, left + glyph.fWidth, top + glyph.fHeight);
14048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkRegion::Cliperator clipper(*state.fClip, mask.fBounds);
14058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	if (!clipper.done()) {
14078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		const SkIRect&  cr = clipper.rect();
14088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		const uint8_t*  aa = (const uint8_t*)glyph.fImage;
14098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		if (NULL == aa) {
14108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			aa = (uint8_t*)state.fCache->findImage(glyph);
14118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			if (NULL == aa) {
14128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com				return;
14138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
14148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		}
1415d055c1fde2128514167b315f4d104b177e04a3dereed@android.com
1416d055c1fde2128514167b315f4d104b177e04a3dereed@android.com        // we need to pass the origin, which we approximate with our
1417d055c1fde2128514167b315f4d104b177e04a3dereed@android.com        // (unadjusted) left,top coordinates (the caller called fixedfloor)
1418d055c1fde2128514167b315f4d104b177e04a3dereed@android.com		if (state.fBounder->doIRectGlyph(cr,
1419d055c1fde2128514167b315f4d104b177e04a3dereed@android.com                                         left - glyph.fLeft,
1420d055c1fde2128514167b315f4d104b177e04a3dereed@android.com                                         top - glyph.fTop, glyph)) {
14218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			mask.fRowBytes = glyph.rowBytes();
14226c14b43a840c791699747ba4cc0ed5abf2bda218reed@android.com			mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat);
14238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			mask.fImage = (uint8_t*)aa;
14248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			do {
14258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com				state.fBlitter->blitMask(mask, cr);
14268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com				clipper.next();
14278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com			} while (!clipper.done());
14288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com		}
14298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	}
14308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
14318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1432fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.comstatic bool hasCustomD1GProc(const SkDraw& draw) {
1433fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com    return draw.fProcs && draw.fProcs->fD1GProc;
1434fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com}
1435fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com
1436fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.comstatic bool needsRasterTextBlit(const SkDraw& draw) {
1437fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com    return !hasCustomD1GProc(draw);
1438fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com}
1439fd4236ecc1d5eb1bb48ca9dc33df5e9051c3036ereed@google.com
14408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comSkDraw1Glyph::Proc SkDraw1Glyph::init(const SkDraw* draw, SkBlitter* blitter,
14418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                      SkGlyphCache* cache) {
14428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    fDraw = draw;
14438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	fBounder = draw->fBounder;
14448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	fClip = draw->fClip;
14458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    fClipBounds = fClip->getBounds();
14468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	fBlitter = blitter;
14478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	fCache = cache;
14488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14491d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    if (hasCustomD1GProc(*draw)) {
14508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return draw->fProcs->fD1GProc;
14518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
14528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (NULL == fBounder) {
14548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (fClip->isRect()) {
14558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return D1G_NoBounder_RectClip;
14568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
14578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return D1G_NoBounder_RgnClip;
14588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
14598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
14608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return D1G_Bounder;
14618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
14628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
14638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com///////////////////////////////////////////////////////////////////////////////
14658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawText(const char text[], size_t byteLength,
14678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                      SkScalar x, SkScalar y, const SkPaint& paint) const {
14688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(byteLength == 0 || text != NULL);
14698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1470f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkDEBUGCODE(this->validate();)
14718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // nothing to draw
1473dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com    if (text == NULL || byteLength == 0 || fClip->isEmpty()) {
14748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
14758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
14768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (/*paint.isLinearText() ||*/
14788d430185e08d2067584837a76b7193b803fee7a0tomhudson@google.com        (fMatrix->hasPerspective())) {
14798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        this->drawText_asPaths(text, byteLength, x, y, paint);
14808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
14818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
14828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
14838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkDrawCacheProc glyphCacheProc = paint.getDrawCacheProc();
14848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1485f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    const SkMatrix* matrix = fMatrix;
14861d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    if (hasCustomD1GProc(*this)) {
1487f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        // only support the fMVMatrix (for now) for the GPU case, which also
1488f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        // sets the fD1GProc
1489f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        if (fMVMatrix) {
1490f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com            matrix = fMVMatrix;
1491f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        }
1492f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    }
1493f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com
1494f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkAutoGlyphCache    autoCache(paint, matrix);
14958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkGlyphCache*       cache = autoCache.getCache();
1496a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
14978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // transform our starting point
14988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    {
14998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkPoint loc;
1500f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        matrix->mapXY(x, y, &loc);
15018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        x = loc.fX;
15028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        y = loc.fY;
15038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
15048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // need to measure first
15068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.getTextAlign() != SkPaint::kLeft_Align) {
15078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkVector    stop;
15088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        measure_text(cache, glyphCacheProc, text, byteLength, &stop);
15108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScalar    stopX = stop.fX;
15128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScalar    stopY = stop.fY;
15138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (paint.getTextAlign() == SkPaint::kCenter_Align) {
15158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            stopX = SkScalarHalf(stopX);
15168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            stopY = SkScalarHalf(stopY);
15178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
15188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        x -= stopX;
15198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        y -= stopY;
15208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1521a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
15228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkFixed fx = SkScalarToFixed(x);
15238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkFixed fy = SkScalarToFixed(y);
15248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const char* stop = text + byteLength;
15258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1526f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkFixed fxMask = ~0;
1527f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkFixed fyMask = ~0;
15288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.isSubpixelText()) {
1529cb6ccdde5120ec45df208c0b958b263d8252a505reed@google.com        SkAxisAlignment baseline = SkComputeAxisAlignmentForHText(*matrix);
1530cb6ccdde5120ec45df208c0b958b263d8252a505reed@google.com        if (kX_SkAxisAlignment == baseline) {
1531f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com            fyMask = 0;
1532cb6ccdde5120ec45df208c0b958b263d8252a505reed@google.com        } else if (kY_SkAxisAlignment == baseline) {
1533f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com            fxMask = 0;
15348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
15358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1536f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    // apply the bias here, so we don't have to add 1/2 in the loop
1537f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    fx += SK_FixedHalf;
1538f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    fy += SK_FixedHalf;
15398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15401d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    SkAutoBlitterChoose blitter;
15411d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    if (needsRasterTextBlit(*this)) {
15421d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com        blitter.choose(*fBitmap, *matrix, paint);
15431d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    }
15441d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com
15458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkAutoKern          autokern;
154652c748b1691f02f90b27c35bc05074fcef709e66bungeman@google.com    SkDraw1Glyph        d1g;
154752c748b1691f02f90b27c35bc05074fcef709e66bungeman@google.com    SkDraw1Glyph::Proc  proc = d1g.init(this, blitter.get(), cache);
15488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    while (text < stop) {
1550f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        const SkGlyph& glyph  = glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask);
15518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fx += autokern.adjust(glyph);
15538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (glyph.fWidth) {
155552c748b1691f02f90b27c35bc05074fcef709e66bungeman@google.com            proc(d1g, fx, fy, glyph);
15568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
15578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fx += glyph.fAdvanceX;
15588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fy += glyph.fAdvanceY;
15598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
15608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
15618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// last parameter is interpreted as SkFixed [x, y]
15638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// return the fixed position, which may be rounded or not by the caller
15648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//   e.g. subpixel doesn't round
15658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtypedef void (*AlignProc)(const SkPoint&, const SkGlyph&, SkIPoint*);
15668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void leftAlignProc(const SkPoint& loc, const SkGlyph& glyph,
15688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                          SkIPoint* dst) {
15698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    dst->set(SkScalarToFixed(loc.fX), SkScalarToFixed(loc.fY));
15708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
15718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void centerAlignProc(const SkPoint& loc, const SkGlyph& glyph,
15738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                            SkIPoint* dst) {
15748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    dst->set(SkScalarToFixed(loc.fX) - (glyph.fAdvanceX >> 1),
15758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com             SkScalarToFixed(loc.fY) - (glyph.fAdvanceY >> 1));
15768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
15778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void rightAlignProc(const SkPoint& loc, const SkGlyph& glyph,
15798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           SkIPoint* dst) {
15808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    dst->set(SkScalarToFixed(loc.fX) - glyph.fAdvanceX,
15818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com             SkScalarToFixed(loc.fY) - glyph.fAdvanceY);
15828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
15838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic AlignProc pick_align_proc(SkPaint::Align align) {
15858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static const AlignProc gProcs[] = {
15868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        leftAlignProc, centerAlignProc, rightAlignProc
15878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    };
1588a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
15898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT((unsigned)align < SK_ARRAY_COUNT(gProcs));
15908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return gProcs[align];
15928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
15938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
15948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass TextMapState {
15958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic:
15968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    mutable SkPoint fLoc;
1597a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
15988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    TextMapState(const SkMatrix& matrix, SkScalar y)
15998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        : fMatrix(matrix), fProc(matrix.getMapXYProc()), fY(y) {}
16008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
16018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    typedef void (*Proc)(const TextMapState&, const SkScalar pos[]);
1602a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
16038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    Proc pickProc(int scalarsPerPosition);
1604a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
16058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate:
16068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkMatrix&     fMatrix;
16078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix::MapXYProc fProc;
16088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar            fY; // ignored by MapXYProc
16098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // these are only used by Only... procs
16108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar            fScaleX, fTransX, fTransformedY;
16118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
16128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static void MapXProc(const TextMapState& state, const SkScalar pos[]) {
16138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state.fProc(state.fMatrix, *pos, state.fY, &state.fLoc);
16148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1615a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
16168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static void MapXYProc(const TextMapState& state, const SkScalar pos[]) {
16178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state.fProc(state.fMatrix, pos[0], pos[1], &state.fLoc);
16188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1619a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
16208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static void MapOnlyScaleXProc(const TextMapState& state,
16218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                  const SkScalar pos[]) {
16228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state.fLoc.set(SkScalarMul(state.fScaleX, *pos) + state.fTransX,
16238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                       state.fTransformedY);
16248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1625a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
16268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static void MapOnlyTransXProc(const TextMapState& state,
16278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                  const SkScalar pos[]) {
16288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state.fLoc.set(*pos + state.fTransX, state.fTransformedY);
16298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
16308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com};
16318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
16328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comTextMapState::Proc TextMapState::pickProc(int scalarsPerPosition) {
16338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition);
1634a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
16358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (1 == scalarsPerPosition) {
16368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        unsigned mtype = fMatrix.getType();
16378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (mtype & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) {
16388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return MapXProc;
16398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
16408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fScaleX = fMatrix.getScaleX();
16418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fTransX = fMatrix.getTranslateX();
16428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fTransformedY = SkScalarMul(fY, fMatrix.getScaleY()) +
16438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                            fMatrix.getTranslateY();
16448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return (mtype & SkMatrix::kScale_Mask) ?
16458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        MapOnlyScaleXProc : MapOnlyTransXProc;
16468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
16478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
16488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return MapXYProc;
16498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
16508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
16518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
16528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//////////////////////////////////////////////////////////////////////////////
16538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
16548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawPosText(const char text[], size_t byteLength,
16558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                         const SkScalar pos[], SkScalar constY,
16568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                         int scalarsPerPosition, const SkPaint& paint) const {
16578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(byteLength == 0 || text != NULL);
16588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition);
16598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1660f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkDEBUGCODE(this->validate();)
16618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
16628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // nothing to draw
1663dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com    if (text == NULL || byteLength == 0 || fClip->isEmpty()) {
16648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
16658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
16668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
16678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (/*paint.isLinearText() ||*/
16688d430185e08d2067584837a76b7193b803fee7a0tomhudson@google.com        (fMatrix->hasPerspective())) {
16698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // TODO !!!!
16708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//      this->drawText_asPaths(text, byteLength, x, y, paint);
16718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
16728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
16738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1674f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    const SkMatrix* matrix = fMatrix;
16751d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    if (hasCustomD1GProc(*this)) {
1676f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        // only support the fMVMatrix (for now) for the GPU case, which also
1677f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        // sets the fD1GProc
1678f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        if (fMVMatrix) {
1679f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com            matrix = fMVMatrix;
1680f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        }
1681f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    }
1682a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
16838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkDrawCacheProc     glyphCacheProc = paint.getDrawCacheProc();
1684f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkAutoGlyphCache    autoCache(paint, matrix);
16858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkGlyphCache*       cache = autoCache.getCache();
1686a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
16871d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    SkAutoBlitterChoose blitter;
16881d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    if (needsRasterTextBlit(*this)) {
16891d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com        blitter.choose(*fBitmap, *matrix, paint);
16901d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com    }
16911d6ee0bd4db7f3b676209341214641d9af5a965freed@google.com
16928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const char*        stop = text + byteLength;
16938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    AlignProc          alignProc = pick_align_proc(paint.getTextAlign());
16948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkDraw1Glyph	   d1g;
16958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com	SkDraw1Glyph::Proc  proc = d1g.init(this, blitter.get(), cache);
1696f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    TextMapState       tms(*matrix, constY);
16978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    TextMapState::Proc tmsProc = tms.pickProc(scalarsPerPosition);
16988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
16998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.isSubpixelText()) {
17008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // maybe we should skip the rounding if linearText is set
1701cb6ccdde5120ec45df208c0b958b263d8252a505reed@google.com        SkAxisAlignment roundBaseline = SkComputeAxisAlignmentForHText(*matrix);
17028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
17038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (SkPaint::kLeft_Align == paint.getTextAlign()) {
17048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            while (text < stop) {
1705a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
17068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                tmsProc(tms, pos);
1707a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
17088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkFixed fx = SkScalarToFixed(tms.fLoc.fX);
17098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkFixed fy = SkScalarToFixed(tms.fLoc.fY);
1710f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                SkFixed fxMask = ~0;
1711f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                SkFixed fyMask = ~0;
17128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1713cb6ccdde5120ec45df208c0b958b263d8252a505reed@google.com                if (kX_SkAxisAlignment == roundBaseline) {
1714f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    fyMask = 0;
1715cb6ccdde5120ec45df208c0b958b263d8252a505reed@google.com                } else if (kY_SkAxisAlignment == roundBaseline) {
1716f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    fxMask = 0;
17178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                }
1718a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1719f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                const SkGlyph& glyph = glyphCacheProc(cache, &text,
1720f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                                                      fx & fxMask, fy & fyMask);
1721a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
17228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                if (glyph.fWidth) {
1723f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    proc(d1g, fx, fy, glyph);
17248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                }
17258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                pos += scalarsPerPosition;
17268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
17278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
17288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            while (text < stop) {
17298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                const SkGlyph* glyph = &glyphCacheProc(cache, &text, 0, 0);
1730a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
17318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                if (glyph->fWidth) {
17328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    SkDEBUGCODE(SkFixed prevAdvX = glyph->fAdvanceX;)
17338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    SkDEBUGCODE(SkFixed prevAdvY = glyph->fAdvanceY;)
17348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
17358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    SkFixed fx, fy;
1736f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    SkFixed fxMask = ~0;
1737f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    SkFixed fyMask = ~0;
17388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    tmsProc(tms, pos);
1739a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
17408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    {
17418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        SkIPoint fixedLoc;
17428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        alignProc(tms.fLoc, *glyph, &fixedLoc);
17438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        fx = fixedLoc.fX;
17448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        fy = fixedLoc.fY;
17458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1746cb6ccdde5120ec45df208c0b958b263d8252a505reed@google.com                        if (kX_SkAxisAlignment == roundBaseline) {
1747f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                            fyMask = 0;
1748cb6ccdde5120ec45df208c0b958b263d8252a505reed@google.com                        } else if (kY_SkAxisAlignment == roundBaseline) {
1749f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                            fxMask = 0;
17508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        }
17518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
1752a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
17538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    // have to call again, now that we've been "aligned"
1754f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    glyph = &glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask);
17558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    // the assumption is that the advance hasn't changed
17568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    SkASSERT(prevAdvX == glyph->fAdvanceX);
17578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    SkASSERT(prevAdvY == glyph->fAdvanceY);
1758a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1759f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                    proc(d1g, fx, fy, *glyph);
17608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                }
17618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                pos += scalarsPerPosition;
17628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
17638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
17648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {    // not subpixel
17658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        while (text < stop) {
17668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            // the last 2 parameters are ignored
17678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0);
1768a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
17698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (glyph.fWidth) {
17708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                tmsProc(tms, pos);
1771a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
17728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkIPoint fixedLoc;
17738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                alignProc(tms.fLoc, glyph, &fixedLoc);
1774a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1775f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                proc(d1g, fixedLoc.fX + SK_FixedHalf,
1776f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com                     fixedLoc.fY + SK_FixedHalf, glyph);
17778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
17788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            pos += scalarsPerPosition;
17798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
17808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
17818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
17828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
17838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#if defined _WIN32 && _MSC_VER >= 1300
17848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#pragma warning ( pop )
17858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif
17868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
17878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com///////////////////////////////////////////////////////////////////////////////
17888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
17898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPathMeasure.h"
17908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
17918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void morphpoints(SkPoint dst[], const SkPoint src[], int count,
17928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        SkPathMeasure& meas, const SkMatrix& matrix) {
17938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix::MapXYProc proc = matrix.getMapXYProc();
17948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
17958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i++) {
17968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkPoint pos;
17978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkVector tangent;
17988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
17998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        proc(matrix, src[i].fX, src[i].fY, &pos);
18008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScalar sx = pos.fX;
18018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScalar sy = pos.fY;
18028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        meas.getPosTan(sx, &pos, &tangent);
18048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        /*  This is the old way (that explains our approach but is way too slow
18068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkMatrix    matrix;
18078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkPoint     pt;
18088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            pt.set(sx, sy);
18108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            matrix.setSinCos(tangent.fY, tangent.fX);
18118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            matrix.preTranslate(-sx, 0);
18128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            matrix.postTranslate(pos.fX, pos.fY);
18138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            matrix.mapPoints(&dst[i], &pt, 1);
18148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        */
18158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        dst[i].set(pos.fX - SkScalarMul(tangent.fY, sy),
18168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                   pos.fY + SkScalarMul(tangent.fX, sy));
18178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
18188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
18198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/*  TODO
18218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    Need differentially more subdivisions when the follow-path is curvy. Not sure how to
18238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    determine that, but we need it. I guess a cheap answer is let the caller tell us,
18248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    but that seems like a cop-out. Another answer is to get Rob Johnson to figure it out.
18258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/
18268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void morphpath(SkPath* dst, const SkPath& src, SkPathMeasure& meas,
18278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                      const SkMatrix& matrix) {
18288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPath::Iter    iter(src, false);
18298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPoint         srcP[4], dstP[3];
18308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPath::Verb    verb;
18318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    while ((verb = iter.next(srcP)) != SkPath::kDone_Verb) {
18338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        switch (verb) {
18348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            case SkPath::kMove_Verb:
18358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                morphpoints(dstP, srcP, 1, meas, matrix);
18368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                dst->moveTo(dstP[0]);
18378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                break;
18388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            case SkPath::kLine_Verb:
18398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                // turn lines into quads to look bendy
18408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                srcP[0].fX = SkScalarAve(srcP[0].fX, srcP[1].fX);
18418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                srcP[0].fY = SkScalarAve(srcP[0].fY, srcP[1].fY);
18428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                morphpoints(dstP, srcP, 2, meas, matrix);
18438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                dst->quadTo(dstP[0], dstP[1]);
18448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                break;
18458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            case SkPath::kQuad_Verb:
18468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                morphpoints(dstP, &srcP[1], 2, meas, matrix);
18478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                dst->quadTo(dstP[0], dstP[1]);
18488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                break;
18498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            case SkPath::kCubic_Verb:
18508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                morphpoints(dstP, &srcP[1], 3, meas, matrix);
18518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                dst->cubicTo(dstP[0], dstP[1], dstP[2]);
18528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                break;
18538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            case SkPath::kClose_Verb:
18548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                dst->close();
18558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                break;
18568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            default:
18578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                SkASSERT(!"unknown verb");
18588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                break;
18598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
18608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
18618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
18628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawTextOnPath(const char text[], size_t byteLength,
18648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                            const SkPath& follow, const SkMatrix* matrix,
18658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                            const SkPaint& paint) const {
18668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(byteLength == 0 || text != NULL);
18678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // nothing to draw
1869dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com    if (text == NULL || byteLength == 0 || fClip->isEmpty()) {
18708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
18718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
18728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkTextToPathIter    iter(text, byteLength, paint, true, true);
18748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPathMeasure       meas(follow, false);
18758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar            hOffset = 0;
18768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // need to measure first
18788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.getTextAlign() != SkPaint::kLeft_Align) {
18798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkScalar pathLen = meas.getLength();
18808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (paint.getTextAlign() == SkPaint::kCenter_Align) {
18818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            pathLen = SkScalarHalf(pathLen);
18828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
18838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        hOffset += pathLen;
18848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
18858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkPath*   iterPath;
18878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar        xpos;
18888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix        scaledMatrix;
18898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar        scale = iter.getPathScale();
18908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    scaledMatrix.setScale(scale, scale);
1892a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
18938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    while ((iterPath = iter.next(&xpos)) != NULL) {
18948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkPath      tmp;
18958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkMatrix    m(scaledMatrix);
18968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
18978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        m.postTranslate(xpos + hOffset, 0);
18988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (matrix) {
18998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            m.postConcat(*matrix);
19008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
19018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        morphpath(&tmp, *iterPath, meas, m);
1902f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        if (fDevice) {
1903f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com            fDevice->drawPath(*this, tmp, iter.getPaint(), NULL, true);
1904f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        } else {
1905f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com            this->drawPath(tmp, iter.getPaint(), NULL, true);
1906f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com        }
19078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
19088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
19098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
1910cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com#ifdef ANDROID
1911cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.comvoid SkDraw::drawPosTextOnPath(const char text[], size_t byteLength,
1912cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com                               const SkPoint pos[], const SkPaint& paint,
1913cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com                               const SkPath& path, const SkMatrix* matrix) const {
1914cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    // nothing to draw
1915dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com    if (text == NULL || byteLength == 0 || fClip->isEmpty()) {
1916cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        return;
1917cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    }
1918cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1919cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    SkMatrix scaledMatrix;
1920cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    SkPathMeasure meas(path, false);
1921cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1922cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    SkMeasureCacheProc glyphCacheProc = paint.getMeasureCacheProc(
1923cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com            SkPaint::kForward_TextBufferDirection, true);
1924cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1925cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    // Copied (modified) from SkTextToPathIter constructor to setup paint
1926cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    SkPaint tempPaint(paint);
1927cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1928cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    tempPaint.setLinearText(true);
1929cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    tempPaint.setMaskFilter(NULL); // don't want this affecting our path-cache lookup
1930cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1931cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    if (tempPaint.getPathEffect() == NULL && !(tempPaint.getStrokeWidth() > 0
1932cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com            && tempPaint.getStyle() != SkPaint::kFill_Style)) {
1933cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        tempPaint.setStyle(SkPaint::kFill_Style);
1934cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        tempPaint.setPathEffect(NULL);
1935cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    }
1936cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    // End copied from SkTextToPathIter constructor
1937cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1938cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    // detach cache
1939cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    SkGlyphCache* cache = tempPaint.detachCache(NULL);
1940cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1941cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    // Must set scale, even if 1
1942cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    SkScalar scale = SK_Scalar1;
1943cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    scaledMatrix.setScale(scale, scale);
1944cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1945cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    // Loop over all glyph ids
1946cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    for (const char* stop = text + byteLength; text < stop; pos++) {
1947cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1948cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        const SkGlyph& glyph = glyphCacheProc(cache, &text);
1949cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        SkPath tmp;
1950cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1951cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        const SkPath* glyphPath = cache->findPath(glyph);
1952cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        if (glyphPath == NULL) {
1953cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com            continue;
1954cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        }
1955cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1956cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        SkMatrix m(scaledMatrix);
1957cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        m.postTranslate(pos->fX, 0);
1958cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1959cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        if (matrix) {
1960cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com            m.postConcat(*matrix);
1961cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        }
1962cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1963cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        morphpath(&tmp, *glyphPath, meas, m);
1964cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com        this->drawPath(tmp, tempPaint);
1965cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1966cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    }
1967cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
1968cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    // re-attach cache
1969cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com    SkGlyphCache::AttachCache(cache);
1970cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com}
1971cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com#endif
1972cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com
19738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com///////////////////////////////////////////////////////////////////////////////
19748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
19758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstruct VertState {
19768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int f0, f1, f2;
19778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
19788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    VertState(int vCount, const uint16_t indices[], int indexCount)
19798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            : fIndices(indices) {
19808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fCurrIndex = 0;
19818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (indices) {
19828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fCount = indexCount;
19838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
19848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            fCount = vCount;
19858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
19868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
1987a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
1988a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com    typedef bool (*Proc)(VertState*);
19898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    Proc chooseProc(SkCanvas::VertexMode mode);
19908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
19918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate:
19928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int             fCount;
19938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int             fCurrIndex;
19948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const uint16_t* fIndices;
1995a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
19968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static bool Triangles(VertState*);
19978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static bool TrianglesX(VertState*);
19988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static bool TriangleStrip(VertState*);
19998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static bool TriangleStripX(VertState*);
20008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static bool TriangleFan(VertState*);
20018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static bool TriangleFanX(VertState*);
20028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com};
20038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
20048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool VertState::Triangles(VertState* state) {
20058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int index = state->fCurrIndex;
20068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (index + 3 > state->fCount) {
20078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
20088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
20098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f0 = index + 0;
20108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f1 = index + 1;
20118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f2 = index + 2;
20128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->fCurrIndex = index + 3;
20138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return true;
20148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
20158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
20168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool VertState::TrianglesX(VertState* state) {
20178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const uint16_t* indices = state->fIndices;
20188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int index = state->fCurrIndex;
20198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (index + 3 > state->fCount) {
20208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
20218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
20228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f0 = indices[index + 0];
20238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f1 = indices[index + 1];
20248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f2 = indices[index + 2];
20258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->fCurrIndex = index + 3;
20268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return true;
20278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
20288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
20298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool VertState::TriangleStrip(VertState* state) {
20308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int index = state->fCurrIndex;
20318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (index + 3 > state->fCount) {
20328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
20338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
20348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f2 = index + 2;
20358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (index & 1) {
20368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state->f0 = index + 1;
20378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state->f1 = index + 0;
20388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
20398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state->f0 = index + 0;
20408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state->f1 = index + 1;
20418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
20428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->fCurrIndex = index + 1;
20438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return true;
20448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
20458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
20468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool VertState::TriangleStripX(VertState* state) {
20478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const uint16_t* indices = state->fIndices;
20488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int index = state->fCurrIndex;
20498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (index + 3 > state->fCount) {
20508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
20518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
20528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f2 = indices[index + 2];
20538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (index & 1) {
20548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state->f0 = indices[index + 1];
20558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state->f1 = indices[index + 0];
20568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
20578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state->f0 = indices[index + 0];
20588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        state->f1 = indices[index + 1];
20598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
20608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->fCurrIndex = index + 1;
20618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return true;
20628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
20638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
20648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool VertState::TriangleFan(VertState* state) {
20658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int index = state->fCurrIndex;
20668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (index + 3 > state->fCount) {
20678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
20688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
20698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f0 = 0;
20708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f1 = index + 1;
20718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f2 = index + 2;
20728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->fCurrIndex = index + 1;
20738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return true;
20748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
20758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
20768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool VertState::TriangleFanX(VertState* state) {
20778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const uint16_t* indices = state->fIndices;
20788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int index = state->fCurrIndex;
20798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (index + 3 > state->fCount) {
20808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
20818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
20828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f0 = indices[0];
20838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f1 = indices[index + 1];
20848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->f2 = indices[index + 2];
20858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    state->fCurrIndex = index + 1;
20868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return true;
20878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
20888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
20898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comVertState::Proc VertState::chooseProc(SkCanvas::VertexMode mode) {
20908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    switch (mode) {
20918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        case SkCanvas::kTriangles_VertexMode:
20928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return fIndices ? TrianglesX : Triangles;
20938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        case SkCanvas::kTriangleStrip_VertexMode:
20948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return fIndices ? TriangleStripX : TriangleStrip;
20958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        case SkCanvas::kTriangleFan_VertexMode:
20968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return fIndices ? TriangleFanX : TriangleFan;
20978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        default:
20988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return NULL;
20998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
21008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
21018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtypedef void (*HairProc)(const SkPoint&, const SkPoint&, const SkRegion*,
21038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                         SkBlitter*);
21048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic HairProc ChooseHairProc(bool doAntiAlias) {
21068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return doAntiAlias ? SkScan::AntiHairLine : SkScan::HairLine;
21078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
21088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic bool texture_to_matrix(const VertState& state, const SkPoint verts[],
21108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                              const SkPoint texs[], SkMatrix* matrix) {
21118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPoint src[3], dst[3];
2112a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    src[0] = texs[state.f0];
21148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    src[1] = texs[state.f1];
21158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    src[2] = texs[state.f2];
21168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    dst[0] = verts[state.f0];
21178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    dst[1] = verts[state.f1];
21188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    dst[2] = verts[state.f2];
21198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return matrix->setPolyToPoly(src, dst, 3);
21208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
21218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkTriColorShader : public SkShader {
21238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic:
21248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkTriColorShader() {}
21258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bool setup(const SkPoint pts[], const SkColor colors[], int, int, int);
2127a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count);
2129a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprotected:
21318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkTriColorShader(SkFlattenableReadBuffer& buffer) : SkShader(buffer) {}
2132a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    virtual Factory getFactory() { return CreateProc; }
2134a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate:
21368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix    fDstToUnit;
21378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPMColor   fColors[3];
2138a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
21408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return SkNEW_ARGS(SkTriColorShader, (buffer));
21418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
21428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    typedef SkShader INHERITED;
21438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com};
21448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool SkTriColorShader::setup(const SkPoint pts[], const SkColor colors[],
21468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                             int index0, int index1, int index2) {
2147a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    fColors[0] = SkPreMultiplyColor(colors[index0]);
21498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    fColors[1] = SkPreMultiplyColor(colors[index1]);
21508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    fColors[2] = SkPreMultiplyColor(colors[index2]);
2151a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix m, im;
21538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    m.reset();
21548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    m.set(0, pts[index1].fX - pts[index0].fX);
21558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    m.set(1, pts[index2].fX - pts[index0].fX);
21568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    m.set(2, pts[index0].fX);
21578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    m.set(3, pts[index1].fY - pts[index0].fY);
21588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    m.set(4, pts[index2].fY - pts[index0].fY);
21598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    m.set(5, pts[index0].fY);
21608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (!m.invert(&im)) {
21618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
21628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
21638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return fDstToUnit.setConcat(im, this->getTotalInverse());
21648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
21658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkColorPriv.h"
2167689411a87ca7d19abe04b5c9baff26bd96b2123ereed@android.com#include "SkComposeShader.h"
21688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic int ScalarTo256(SkScalar v) {
21708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    int scale = SkScalarToFixed(v) >> 8;
21718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (scale < 0) {
21728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        scale = 0;
21738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
21748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (scale > 255) {
21758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        scale = 255;
21768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
21778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return SkAlpha255To256(scale);
21788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
21798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
21808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkTriColorShader::shadeSpan(int x, int y, SkPMColor dstC[], int count) {
21818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPoint src;
2182a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    for (int i = 0; i < count; i++) {
21848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        fDstToUnit.mapXY(SkIntToScalar(x), SkIntToScalar(y), &src);
21858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        x += 1;
2186a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int scale1 = ScalarTo256(src.fX);
21888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int scale2 = ScalarTo256(src.fY);
21898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int scale0 = 256 - scale1 - scale2;
21908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (scale0 < 0) {
21918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (scale1 > scale2) {
21928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                scale2 = 256 - scale1;
21938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            } else {
21948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                scale1 = 256 - scale2;
21958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
21968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            scale0 = 0;
21978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
2198a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
21998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        dstC[i] = SkAlphaMulQ(fColors[0], scale0) +
22008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkAlphaMulQ(fColors[1], scale1) +
22018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkAlphaMulQ(fColors[2], scale2);
22028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
22038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
22048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
22058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkDraw::drawVertices(SkCanvas::VertexMode vmode, int count,
22068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                          const SkPoint vertices[], const SkPoint textures[],
22078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                          const SkColor colors[], SkXfermode* xmode,
22088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                          const uint16_t indices[], int indexCount,
22098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                          const SkPaint& paint) const {
22108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(0 == count || NULL != vertices);
2211a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
22128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // abort early if there is nothing to draw
2213dcd0f3a980095b77ebe605b49777a4bd37ca7b0areed@google.com    if (count < 3 || (indices && indexCount < 3) || fClip->isEmpty()) {
22148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return;
22158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2216a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
22178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // transform out vertices into device coordinates
22188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkAutoSTMalloc<16, SkPoint> storage(count);
22198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPoint* devVerts = storage.get();
22208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    fMatrix->mapPoints(devVerts, vertices, count);
2221a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
22228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (fBounder) {
22238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkRect bounds;
22248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        bounds.set(devVerts, count);
22258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (!fBounder->doRect(bounds, paint)) {
22268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return;
22278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
22288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2229a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
22308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    /*
22318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        We can draw the vertices in 1 of 4 ways:
22328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
22338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        - solid color (no shader/texture[], no colors[])
22348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        - just colors (no shader/texture[], has colors[])
22358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        - just texture (has shader/texture[], no colors[])
22368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        - colors * texture (has shader/texture[], has colors[])
2237a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
22388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        Thus for texture drawing, we need both texture[] and a shader.
22398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    */
22408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
22418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkTriColorShader triShader; // must be above declaration of p
22428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPaint p(paint);
22438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
22448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkShader* shader = p.getShader();
22458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (NULL == shader) {
22468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // if we have no shader, we ignore the texture coordinates
22478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        textures = NULL;
22488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else if (NULL == textures) {
22498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // if we don't have texture coordinates, ignore the shader
22508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        p.setShader(NULL);
22518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        shader = NULL;
22528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
22538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
22548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // setup the custom shader (if needed)
22558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (NULL != colors) {
22568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (NULL == textures) {
22578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            // just colors (no texture)
22588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            p.setShader(&triShader);
22598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        } else {
22608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            // colors * texture
22618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkASSERT(shader);
22628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            bool releaseMode = false;
22638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (NULL == xmode) {
2264845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com                xmode = SkXfermode::Create(SkXfermode::kMultiply_Mode);
22658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                releaseMode = true;
22668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
22678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkShader* compose = SkNEW_ARGS(SkComposeShader,
22688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                           (&triShader, shader, xmode));
22698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            p.setShader(compose)->unref();
22708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (releaseMode) {
22718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                xmode->unref();
22728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
22738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
22748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
22758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
22768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, p);
22778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // setup our state and function pointer for iterating triangles
22788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    VertState       state(count, indices, indexCount);
22798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    VertState::Proc vertProc = state.chooseProc(vmode);
2280a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
22818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (NULL != textures || NULL != colors) {
22828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkMatrix  localM, tempM;
22838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        bool      hasLocalM = shader && shader->getLocalMatrix(&localM);
2284a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
22858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (NULL != colors) {
22868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (!triShader.setContext(*fBitmap, p, *fMatrix)) {
22878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                colors = NULL;
22888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
22898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
2290a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
22918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        while (vertProc(&state)) {
22928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (NULL != textures) {
22938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                if (texture_to_matrix(state, vertices, textures, &tempM)) {
22948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    if (hasLocalM) {
22958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        tempM.postConcat(localM);
22968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
22978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    shader->setLocalMatrix(tempM);
22988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    // need to recal setContext since we changed the local matrix
22998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    if (!shader->setContext(*fBitmap, p, *fMatrix)) {
23008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        continue;
23018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    }
23028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                }
23038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
23048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (NULL != colors) {
23058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                if (!triShader.setup(vertices, colors,
23068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                     state.f0, state.f1, state.f2)) {
23078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                    continue;
23088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                }
23098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
23108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            SkScan::FillTriangle(devVerts[state.f0], devVerts[state.f1],
23118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                                 devVerts[state.f2], fClip, blitter.get());
23128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
23138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // now restore the shader's original local matrix
23148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (NULL != shader) {
23158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            if (hasLocalM) {
23168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                shader->setLocalMatrix(localM);
23178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            } else {
23188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                shader->resetLocalMatrix();
23198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            }
23208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
23218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
23228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        // no colors[] and no texture
23238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        HairProc hairProc = ChooseHairProc(paint.isAntiAlias());
23248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        while (vertProc(&state)) {
23258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            hairProc(devVerts[state.f0], devVerts[state.f1], fClip, blitter.get());
23268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            hairProc(devVerts[state.f1], devVerts[state.f2], fClip, blitter.get());
23278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            hairProc(devVerts[state.f2], devVerts[state.f0], fClip, blitter.get());
23288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
23298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
23308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
23318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
23320a0a236c3ba241046d38caaf78226ec68ff9c998reed@google.com///////////////////////////////////////////////////////////////////////////////
23330a0a236c3ba241046d38caaf78226ec68ff9c998reed@google.com///////////////////////////////////////////////////////////////////////////////
23348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
23358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_DEBUG
23368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2337f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.comvoid SkDraw::validate() const {
23388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(fBitmap != NULL);
23398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(fMatrix != NULL);
23408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(fClip != NULL);
23418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
23428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    const SkIRect&  cr = fClip->getBounds();
23438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkIRect         br;
23448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2345f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    br.set(0, 0, fBitmap->width(), fBitmap->height());
23468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkASSERT(cr.isEmpty() || br.contains(cr));
2347f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com
2348f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    // assert that both are null, or both are not-null
2349f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com    SkASSERT(!fMVMatrix == !fExtMatrix);
23508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
23518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
23528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif
23538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
23540a0a236c3ba241046d38caaf78226ec68ff9c998reed@google.com///////////////////////////////////////////////////////////////////////////////
23550a0a236c3ba241046d38caaf78226ec68ff9c998reed@google.com
23560a0a236c3ba241046d38caaf78226ec68ff9c998reed@google.comSkBounder::SkBounder() {
23570a0a236c3ba241046d38caaf78226ec68ff9c998reed@google.com    // initialize up front. This gets reset by SkCanvas before each draw call.
23580a0a236c3ba241046d38caaf78226ec68ff9c998reed@google.com    fClip = &SkRegion::GetEmptyRegion();
23590a0a236c3ba241046d38caaf78226ec68ff9c998reed@google.com}
23608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
23618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool SkBounder::doIRect(const SkIRect& r) {
23628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkIRect    rr;
23638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return rr.intersect(fClip->getBounds(), r) && this->onIRect(rr);
23648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
23658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
2366d055c1fde2128514167b315f4d104b177e04a3dereed@android.com// TODO: change the prototype to take fixed, and update the callers
2367d055c1fde2128514167b315f4d104b177e04a3dereed@android.combool SkBounder::doIRectGlyph(const SkIRect& r, int x, int y,
2368d055c1fde2128514167b315f4d104b177e04a3dereed@android.com                             const SkGlyph& glyph) {
2369474a12c4976b3000174cad5df74c498cd723c5e2reed@android.com    SkIRect    rr;
2370d055c1fde2128514167b315f4d104b177e04a3dereed@android.com    if (!rr.intersect(fClip->getBounds(), r)) {
2371d055c1fde2128514167b315f4d104b177e04a3dereed@android.com        return false;
2372d055c1fde2128514167b315f4d104b177e04a3dereed@android.com    }
2373d055c1fde2128514167b315f4d104b177e04a3dereed@android.com    GlyphRec rec;
2374d055c1fde2128514167b315f4d104b177e04a3dereed@android.com    rec.fLSB.set(SkIntToFixed(x), SkIntToFixed(y));
2375d055c1fde2128514167b315f4d104b177e04a3dereed@android.com    rec.fRSB.set(rec.fLSB.fX + glyph.fAdvanceX,
2376d055c1fde2128514167b315f4d104b177e04a3dereed@android.com                 rec.fLSB.fY + glyph.fAdvanceY);
2377d055c1fde2128514167b315f4d104b177e04a3dereed@android.com    rec.fGlyphID = glyph.getGlyphID();
2378d055c1fde2128514167b315f4d104b177e04a3dereed@android.com    rec.fFlags = 0;
2379d055c1fde2128514167b315f4d104b177e04a3dereed@android.com    return this->onIRectGlyph(rr, rec);
2380474a12c4976b3000174cad5df74c498cd723c5e2reed@android.com}
2381474a12c4976b3000174cad5df74c498cd723c5e2reed@android.com
23828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool SkBounder::doHairline(const SkPoint& pt0, const SkPoint& pt1,
23838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           const SkPaint& paint) {
23848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkIRect     r;
23858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkScalar    v0, v1;
23868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
23878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    v0 = pt0.fX;
23888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    v1 = pt1.fX;
23898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (v0 > v1) {
23908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkTSwap<SkScalar>(v0, v1);
23918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
23928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    r.fLeft     = SkScalarFloor(v0);
23938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    r.fRight    = SkScalarCeil(v1);
23948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
23958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    v0 = pt0.fY;
23968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    v1 = pt1.fY;
23978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (v0 > v1) {
23988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkTSwap<SkScalar>(v0, v1);
23998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
24008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    r.fTop      = SkScalarFloor(v0);
24018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    r.fBottom   = SkScalarCeil(v1);
24028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.isAntiAlias()) {
24048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.inset(-1, -1);
24058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
24068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return this->doIRect(r);
24078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
24088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool SkBounder::doRect(const SkRect& rect, const SkPaint& paint) {
24108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkIRect    r;
24118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.getStyle() == SkPaint::kFill_Style) {
24138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        rect.round(&r);
24148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {
24158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        int rad = -1;
24168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        rect.roundOut(&r);
24178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (paint.isAntiAlias()) {
24188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            rad = -2;
24198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
24208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.inset(rad, rad);
24218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
24228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return this->doIRect(r);
24238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
24248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool SkBounder::doPath(const SkPath& path, const SkPaint& paint, bool doFill) {
2426d252db03d9650013b545ef9781fe993c07f8f314reed@android.com    SkIRect       r;
2427d252db03d9650013b545ef9781fe993c07f8f314reed@android.com    const SkRect& bounds = path.getBounds();
24288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (doFill) {
24308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        bounds.round(&r);
24318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    } else {    // hairline
24328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        bounds.roundOut(&r);
24338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
24348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (paint.isAntiAlias()) {
24368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        r.inset(-1, -1);
24378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
24388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return this->doIRect(r);
24398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
24408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkBounder::commit() {
24428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // override in subclass
24438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
24448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com////////////////////////////////////////////////////////////////////////////////////////////////
24468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPath.h"
24488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkDraw.h"
24498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkRegion.h"
24508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkBlitter.h"
24518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic bool compute_bounds(const SkPath& devPath, const SkIRect* clipBounds,
24538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           SkMaskFilter* filter, const SkMatrix* filterMatrix,
24548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                           SkIRect* bounds) {
24558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (devPath.isEmpty()) {
24568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        return false;
24578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
24588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    //  init our bounds from the path
24608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    {
2461d252db03d9650013b545ef9781fe993c07f8f314reed@android.com        SkRect pathBounds = devPath.getBounds();
24628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        pathBounds.inset(-SK_ScalarHalf, -SK_ScalarHalf);
24638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        pathBounds.roundOut(bounds);
24648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2465a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
24665af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com    SkIPoint margin;
24678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (filter) {
24688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        SkASSERT(filterMatrix);
2469a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
24705af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com        SkMask srcM, dstM;
2471a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
24728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        srcM.fBounds = *bounds;
24738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        srcM.fFormat = SkMask::kA8_Format;
24748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        srcM.fImage = NULL;
24758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (!filter->filterMask(&dstM, srcM, *filterMatrix, &margin)) {
24768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return false;
24778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        }
24788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2479a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
24805af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com    // (possibly) trim the bounds to reflect the clip
24818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    // (plus whatever slop the filter needs)
24825af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com    if (clipBounds) {
24835af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com        SkIRect tmp = *clipBounds;
24843555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com        // Ugh. Guard against gigantic margins from wacky filters. Without this
24853555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com        // check we can request arbitrary amounts of slop beyond our visible
24863555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com        // clip, and bring down the renderer (at least on finite RAM machines
24873555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com        // like handsets, etc.). Need to balance this invented value between
24883555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com        // quality of large filters like blurs, and the corresponding memory
24893555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com        // requests.
24903555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com        static const int MAX_MARGIN = 128;
24913555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com        tmp.inset(-SkMin32(margin.fX, MAX_MARGIN),
24923555591c158c242b071c7ec92ad75b6e4cb74af2reed@android.com                  -SkMin32(margin.fY, MAX_MARGIN));
24935af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com        if (!bounds->intersect(tmp)) {
24945af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com            return false;
24955af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com        }
24968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
24978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
24988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return true;
24998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
25008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
25018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void draw_into_mask(const SkMask& mask, const SkPath& devPath) {
25028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkBitmap    bm;
25038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkDraw      draw;
25048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkRegion    clipRgn;
25058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkMatrix    matrix;
25068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    SkPaint     paint;
25078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
25088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(), mask.fBounds.height(), mask.fRowBytes);
25098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    bm.setPixels(mask.fImage);
25108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
25118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    clipRgn.setRect(0, 0, mask.fBounds.width(), mask.fBounds.height());
25128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft),
25138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        -SkIntToScalar(mask.fBounds.fTop));
25148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
25158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    draw.fBitmap    = &bm;
25168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    draw.fClip      = &clipRgn;
25178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    draw.fMatrix    = &matrix;
25188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    draw.fBounder   = NULL;
25198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    paint.setAntiAlias(true);
25208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    draw.drawPath(devPath, paint);
25218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
25228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
25238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combool SkDraw::DrawToMask(const SkPath& devPath, const SkIRect* clipBounds,
25248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        SkMaskFilter* filter, const SkMatrix* filterMatrix,
25258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com                        SkMask* mask, SkMask::CreateMode mode) {
25268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (SkMask::kJustRenderImage_CreateMode != mode) {
25278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        if (!compute_bounds(devPath, clipBounds, filter, filterMatrix, &mask->fBounds))
25288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com            return false;
25298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2530a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
25318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (SkMask::kComputeBoundsAndRenderImage_CreateMode == mode) {
25328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask->fFormat = SkMask::kA8_Format;
25338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        mask->fRowBytes = mask->fBounds.width();
2534543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com        size_t size = mask->computeImageSize();
2535543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com        if (0 == size) {
2536543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com            // we're too big to allocate the mask, abort
2537543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com            return false;
2538543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com        }
2539543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com        mask->fImage = SkMask::AllocImage(size);
25408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        memset(mask->fImage, 0, mask->computeImageSize());
25418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
25428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com
25438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    if (SkMask::kJustComputeBounds_CreateMode != mode) {
25448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com        draw_into_mask(*mask, devPath);
25458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    }
2546a76de3d1a92134c3e95ad7fce99234f92fa48268reed@google.com
25478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com    return true;
25488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}
2549