SkCanvas.h revision 97af1a64ae6bdddd346d8babfd9f188279dd6644
1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 28a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/* 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2006 The Android Open Source Project 48a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.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. 78a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 88a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef SkCanvas_DEFINED 118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkCanvas_DEFINED 128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkTypes.h" 148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkBitmap.h" 158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkDeque.h" 165c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com#include "SkClipStack.h" 178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPaint.h" 188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkRefCnt.h" 198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPath.h" 208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkRegion.h" 218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkScalarCompare.h" 22845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com#include "SkXfermode.h" 238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkBounder; 258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkDevice; 268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkDraw; 278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkDrawFilter; 288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkPicture; 2997af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.comclass SkSurface_Base; 308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** \class SkCanvas 328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com A Canvas encapsulates all of the state about drawing into a device (bitmap). 348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com This includes a reference to the device itself, and a stack of matrix/clip 358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com values. For any given draw call (e.g. drawRect), the geometry of the object 368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com being drawn is transformed by the concatenation of all the matrices in the 378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com stack. The transformed geometry is clipped by the intersection of all of 388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com the clips in the stack. 398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com While the Canvas holds the state of the drawing device, the state (style) 418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com of the object being drawn is held by the Paint, which is provided as a 428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com parameter to each of the draw() methods. The Paint holds attributes such as 438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com color, typeface, textSize, strokeWidth, shader (e.g. gradients, patterns), 448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com etc. 458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 467ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.orgclass SK_API SkCanvas : public SkRefCnt { 478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 4815e9d3e66e161ce23df30bc13f8a0c87d196b463robertphillips@google.com SK_DECLARE_INST_COUNT(SkCanvas) 4915e9d3e66e161ce23df30bc13f8a0c87d196b463robertphillips@google.com 50cde92111d50a96b6d0f3e166fbac7c9bc6eca349reed@google.com SkCanvas(); 518d84fac294682647694b0d2d8a87ac2bd19b6aabvandebo@chromium.org 526dc745506e6d6cc0936fed4de24443dc1ecb5a34reed@google.com /** Construct a canvas with the specified device to draw into. 53e97f0856a8044866b12527819d14cdfbcdfd96f2bsalomon@google.com 548d84fac294682647694b0d2d8a87ac2bd19b6aabvandebo@chromium.org @param device Specifies a device for the canvas to draw into. 558d84fac294682647694b0d2d8a87ac2bd19b6aabvandebo@chromium.org */ 568d84fac294682647694b0d2d8a87ac2bd19b6aabvandebo@chromium.org explicit SkCanvas(SkDevice* device); 578d84fac294682647694b0d2d8a87ac2bd19b6aabvandebo@chromium.org 588d84fac294682647694b0d2d8a87ac2bd19b6aabvandebo@chromium.org /** Deprecated - Construct a canvas with the specified bitmap to draw into. 598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param bitmap Specifies a bitmap for the canvas to draw into. Its 608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com structure are copied to the canvas. 618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com explicit SkCanvas(const SkBitmap& bitmap); 638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual ~SkCanvas(); 648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /////////////////////////////////////////////////////////////////////////// 668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 67210ce003a5ec039dda80de0569fb47ca4efc4dc7reed@google.com /** 68bf6c1e4aff4d233f6502157fb73459cf69d0ab37junov@chromium.org * Trigger the immediate execution of all pending draw operations. 69bf6c1e4aff4d233f6502157fb73459cf69d0ab37junov@chromium.org */ 70bf6c1e4aff4d233f6502157fb73459cf69d0ab37junov@chromium.org void flush(); 71bf6c1e4aff4d233f6502157fb73459cf69d0ab37junov@chromium.org 72bf6c1e4aff4d233f6502157fb73459cf69d0ab37junov@chromium.org /** 73210ce003a5ec039dda80de0569fb47ca4efc4dc7reed@google.com * Return the width/height of the underlying device. The current drawable 74210ce003a5ec039dda80de0569fb47ca4efc4dc7reed@google.com * area may be small (due to clipping or saveLayer). For a canvas with 75210ce003a5ec039dda80de0569fb47ca4efc4dc7reed@google.com * no device, 0,0 will be returned. 76210ce003a5ec039dda80de0569fb47ca4efc4dc7reed@google.com */ 77210ce003a5ec039dda80de0569fb47ca4efc4dc7reed@google.com SkISize getDeviceSize() const; 78210ce003a5ec039dda80de0569fb47ca4efc4dc7reed@google.com 798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return the canvas' device object, which may be null. The device holds 808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com the bitmap of the pixels that the canvas draws into. The reference count 818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com of the returned device is not changed by this call. 828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkDevice* getDevice() const; 848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Specify a device for this canvas to draw into. If it is not null, its 868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com reference count is incremented. If the canvas was already holding a 878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com device, its reference count is decremented. The new device is returned. 888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 894370aedf7f55af74e9ebb4ad1c2e010c08236dfajunov@google.com virtual SkDevice* setDevice(SkDevice* device); 908d84fac294682647694b0d2d8a87ac2bd19b6aabvandebo@chromium.org 919266fed56a46a4edc710a52c7be8d46fd7c2bc7areed@google.com /** 929266fed56a46a4edc710a52c7be8d46fd7c2bc7areed@google.com * saveLayer() can create another device (which is later drawn onto 939266fed56a46a4edc710a52c7be8d46fd7c2bc7areed@google.com * the previous device). getTopDevice() returns the top-most device current 949266fed56a46a4edc710a52c7be8d46fd7c2bc7areed@google.com * installed. Note that this can change on other calls like save/restore, 959266fed56a46a4edc710a52c7be8d46fd7c2bc7areed@google.com * so do not access this device after subsequent canvas calls. 969266fed56a46a4edc710a52c7be8d46fd7c2bc7areed@google.com * The reference count of the device is not changed. 970b53d59a24f667350b4282f88470713902409030reed@google.com * 980b53d59a24f667350b4282f88470713902409030reed@google.com * @param updateMatrixClip If this is true, then before the device is 990b53d59a24f667350b4282f88470713902409030reed@google.com * returned, we ensure that its has been notified about the current 1000b53d59a24f667350b4282f88470713902409030reed@google.com * matrix and clip. Note: this happens automatically when the device 1010b53d59a24f667350b4282f88470713902409030reed@google.com * is drawn to, but is optional here, as there is a small perf hit 1020b53d59a24f667350b4282f88470713902409030reed@google.com * sometimes. 1039266fed56a46a4edc710a52c7be8d46fd7c2bc7areed@google.com */ 1040b53d59a24f667350b4282f88470713902409030reed@google.com SkDevice* getTopDevice(bool updateMatrixClip = false) const; 1059266fed56a46a4edc710a52c7be8d46fd7c2bc7areed@google.com 106f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com /** 107f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com * Create a new raster device and make it current. This also returns 108f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com * the new device. 109f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com */ 110af951c9bc4cbb6e60b430194fe5127ebe99c53fbreed@google.com SkDevice* setBitmapDevice(const SkBitmap& bitmap); 1118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 11251df9e3fe3c1aec370854b2718df16fc02faa1b2reed@google.com /** 113cde92111d50a96b6d0f3e166fbac7c9bc6eca349reed@google.com * Shortcut for getDevice()->createCompatibleDevice(...). 114cde92111d50a96b6d0f3e166fbac7c9bc6eca349reed@google.com * If getDevice() == NULL, this method does nothing, and returns NULL. 115e97f0856a8044866b12527819d14cdfbcdfd96f2bsalomon@google.com */ 11674b461961607fa57a150a9282c410ef0cab38764vandebo@chromium.org SkDevice* createCompatibleDevice(SkBitmap::Config config, 117e97f0856a8044866b12527819d14cdfbcdfd96f2bsalomon@google.com int width, int height, 118e97f0856a8044866b12527819d14cdfbcdfd96f2bsalomon@google.com bool isOpaque); 119e97f0856a8044866b12527819d14cdfbcdfd96f2bsalomon@google.com 1204b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com /////////////////////////////////////////////////////////////////////////// 1214b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 122daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com /** 123d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * This enum can be used with read/writePixels to perform a pixel ops to or 124d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * from an 8888 config other than Skia's native config (SkPMColor). There 125d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * are three byte orders supported: native, BGRA, and RGBA. Each has a 126d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * premultiplied and unpremultiplied variant. 127d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * 128d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * Components of a 8888 pixel can be packed/unpacked from a 32bit word using 129d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * either byte offsets or shift values. Byte offsets are endian-invariant 130d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * while shifts are not. BGRA and RGBA configs are defined by byte 131d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * orderings. The native config is defined by shift values (SK_A32_SHIFT, 132d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * ..., SK_B32_SHIFT). 1336850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com */ 1346850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com enum Config8888 { 1356850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com /** 1366850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * Skia's native order specified by: 1376850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * SK_A32_SHIFT, SK_R32_SHIFT, SK_G32_SHIFT, and SK_B32_SHIFT 1386850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * 1396850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * kNative_Premul_Config8888 is equivalent to SkPMColor 1406850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * kNative_Unpremul_Config8888 has the same component order as SkPMColor 1416850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * but is not premultiplied. 1426850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com */ 1436850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com kNative_Premul_Config8888, 1446850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com kNative_Unpremul_Config8888, 1456850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com /** 1466850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * low byte to high byte: B, G, R, A. 1476850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com */ 1486850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com kBGRA_Premul_Config8888, 1496850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com kBGRA_Unpremul_Config8888, 1506850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com /** 1516850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * low byte to high byte: R, G, B, A. 1526850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com */ 1536850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com kRGBA_Premul_Config8888, 1541f90287df3129cb267422e482c52ebeca6a8990ftomhudson@google.com kRGBA_Unpremul_Config8888 1556850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com }; 1566850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com 1576850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com /** 158daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * On success (returns true), copy the canvas pixels into the bitmap. 159daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * On failure, the bitmap parameter is left unchanged and false is 160daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * returned. 161daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * 1626850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * The canvas' pixels are converted to the bitmap's config. The only 1636850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * supported config is kARGB_8888_Config, though this is likely to be 1646850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * relaxed in the future. The meaning of config kARGB_8888_Config is 1656850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * modified by the enum param config8888. The default value interprets 1666850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * kARGB_8888_Config as SkPMColor 167daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * 168daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * If the bitmap has pixels already allocated, the canvas pixels will be 16974b461961607fa57a150a9282c410ef0cab38764vandebo@chromium.org * written there. If not, bitmap->allocPixels() will be called 170daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * automatically. If the bitmap is backed by a texture readPixels will 171daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * fail. 172daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * 173daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * The actual pixels written is the intersection of the canvas' bounds, and 174daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * the rectangle formed by the bitmap's width,height and the specified x,y. 175daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * If bitmap pixels extend outside of that intersection, they will not be 176daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * modified. 177daba14b7d4fc96b915c45d82713b22729c0d0f37bsalomon@google.com * 1786850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * Other failure conditions: 1796850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * * If the canvas is backed by a non-raster device (e.g. PDF) then 1806850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * readPixels will fail. 1816850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * * If bitmap is texture-backed then readPixels will fail. (This may be 1826850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * relaxed in the future.) 1836850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * 1846850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * Example that reads the entire canvas into a bitmap using the native 1856850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * SkPMColor: 1866850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * SkISize size = canvas->getDeviceSize(); 1876850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * bitmap->setConfig(SkBitmap::kARGB_8888_Config, size.fWidth, 1886850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * size.fHeight); 1896850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * if (canvas->readPixels(bitmap, 0, 0)) { 1906850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * // use the pixels 1916850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com * } 192c69809745e6496564639e42ef998ad39adf7dfb8bsalomon@google.com */ 1936850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com bool readPixels(SkBitmap* bitmap, 1946850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com int x, int y, 1956850eab42ba4c2a7033a99824b02a2846ce0ef2absalomon@google.com Config8888 config8888 = kNative_Premul_Config8888); 196c69809745e6496564639e42ef998ad39adf7dfb8bsalomon@google.com 1974b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com /** 198c69809745e6496564639e42ef998ad39adf7dfb8bsalomon@google.com * DEPRECATED: This will be removed as soon as webkit is no longer relying 199c69809745e6496564639e42ef998ad39adf7dfb8bsalomon@google.com * on it. The bitmap is resized to the intersection of srcRect and the 200c69809745e6496564639e42ef998ad39adf7dfb8bsalomon@google.com * canvas bounds. New pixels are always allocated on success. Bitmap is 201c69809745e6496564639e42ef998ad39adf7dfb8bsalomon@google.com * unmodified on failure. 20251df9e3fe3c1aec370854b2718df16fc02faa1b2reed@google.com */ 20351df9e3fe3c1aec370854b2718df16fc02faa1b2reed@google.com bool readPixels(const SkIRect& srcRect, SkBitmap* bitmap); 20451df9e3fe3c1aec370854b2718df16fc02faa1b2reed@google.com 20551df9e3fe3c1aec370854b2718df16fc02faa1b2reed@google.com /** 20651df9e3fe3c1aec370854b2718df16fc02faa1b2reed@google.com * Similar to draw sprite, this method will copy the pixels in bitmap onto 207d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * the canvas, with the top/left corner specified by (x, y). The canvas' 208d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * pixel values are completely replaced: there is no blending. 209d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * 210d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * Currently if bitmap is backed by a texture this is a no-op. This may be 211d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * relaxed in the future. 212d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * 213d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * If the bitmap has config kARGB_8888_Config then the config8888 param 214d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * will determines how the pixel valuess are intepreted. If the bitmap is 215d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com * not kARGB_8888_Config then this parameter is ignored. 2164f1151ab27485aff393d16559086c4c461f137a4epoger@google.com * 2174f1151ab27485aff393d16559086c4c461f137a4epoger@google.com * Note: If you are recording drawing commands on this canvas to 2184f1151ab27485aff393d16559086c4c461f137a4epoger@google.com * SkPicture, writePixels() is ignored! 21951df9e3fe3c1aec370854b2718df16fc02faa1b2reed@google.com */ 220d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com void writePixels(const SkBitmap& bitmap, 221d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com int x, int y, 222d58a1cd00b969a7755c375f55cf80f4d49d3047bbsalomon@google.com Config8888 config8888 = kNative_Premul_Config8888); 2234b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 2248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /////////////////////////////////////////////////////////////////////////// 2258d84fac294682647694b0d2d8a87ac2bd19b6aabvandebo@chromium.org 2268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com enum SaveFlags { 2278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** save the matrix state, restoring it on restore() */ 2288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kMatrix_SaveFlag = 0x01, 2298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** save the clip state, restoring it on restore() */ 2308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kClip_SaveFlag = 0x02, 2318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** the layer needs to support per-pixel alpha */ 2328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kHasAlphaLayer_SaveFlag = 0x04, 2338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** the layer needs to support 8-bits per color component */ 2348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kFullColorLayer_SaveFlag = 0x08, 2358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** the layer should clip against the bounds argument */ 2368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kClipToLayer_SaveFlag = 0x10, 2378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // helper masks for common choices 2398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kMatrixClip_SaveFlag = 0x03, 2408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kARGB_NoClipLayer_SaveFlag = 0x0F, 2418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kARGB_ClipLayer_SaveFlag = 0x1F 2428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com }; 2438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 244dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com /** This call saves the current matrix, clip, and drawFilter, and pushes a 2458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com copy onto a private stack. Subsequent calls to translate, scale, 246dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com rotate, skew, concat or clipRect, clipPath, and setDrawFilter all 247dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com operate on this copy. 248dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com When the balancing call to restore() is made, the previous matrix, clip, 249dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com and drawFilter are restored. 2508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return The value to pass to restoreToCount() to balance this save() 2518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 2528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual int save(SaveFlags flags = kMatrixClip_SaveFlag); 2538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** This behaves the same as save(), but in addition it allocates an 2558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com offscreen bitmap. All drawing calls are directed there, and only when 2568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com the balancing call to restore() is made is that offscreen transfered to 257dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com the canvas (or the previous layer). 258ad164b2025cba65131ca68221a6ea7640d7b1de8reed@android.com @param bounds (may be null) This rect, if non-null, is used as a hint to 259ad164b2025cba65131ca68221a6ea7640d7b1de8reed@android.com limit the size of the offscreen, and thus drawing may be 260ad164b2025cba65131ca68221a6ea7640d7b1de8reed@android.com clipped to it, though that clipping is not guaranteed to 261ad164b2025cba65131ca68221a6ea7640d7b1de8reed@android.com happen. If exact clipping is desired, use clipRect(). 2628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint (may be null) This is copied, and is applied to the 2638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com offscreen when restore() is called 2648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param flags LayerFlags 2658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return The value to pass to restoreToCount() to balance this save() 2668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 2678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual int saveLayer(const SkRect* bounds, const SkPaint* paint, 2688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SaveFlags flags = kARGB_ClipLayer_SaveFlag); 2698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** This behaves the same as save(), but in addition it allocates an 2718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com offscreen bitmap. All drawing calls are directed there, and only when 2728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com the balancing call to restore() is made is that offscreen transfered to 273dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com the canvas (or the previous layer). 27440408614655c4057d93842c9b0f09aa6dfff9e02reed@android.com @param bounds (may be null) This rect, if non-null, is used as a hint to 27540408614655c4057d93842c9b0f09aa6dfff9e02reed@android.com limit the size of the offscreen, and thus drawing may be 27640408614655c4057d93842c9b0f09aa6dfff9e02reed@android.com clipped to it, though that clipping is not guaranteed to 27740408614655c4057d93842c9b0f09aa6dfff9e02reed@android.com happen. If exact clipping is desired, use clipRect(). 2788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param alpha This is applied to the offscreen when restore() is called. 2798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param flags LayerFlags 2808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return The value to pass to restoreToCount() to balance this save() 2818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 2828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int saveLayerAlpha(const SkRect* bounds, U8CPU alpha, 2838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SaveFlags flags = kARGB_ClipLayer_SaveFlag); 2848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** This call balances a previous call to save(), and is used to remove all 286dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com modifications to the matrix/clip/drawFilter state since the last save 287dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com call. 288dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com It is an error to call restore() more times than save() was called. 2898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 2908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void restore(); 2918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Returns the number of matrix/clip states on the SkCanvas' private stack. 2938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com This will equal # save() calls - # restore() calls. 2948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 295a907ac3e3e3458fbb5d673c3feafb31fd7647b38junov@chromium.org int getSaveCount() const; 2968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Efficient way to pop any calls to save() that happened after the save 2988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com count reached saveCount. It is an error for saveCount to be less than 2998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com getSaveCount() 3008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param saveCount The number of save() levels to restore from 3018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void restoreToCount(int saveCount); 3038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3047c2029367cea5479fa3b74fb0ca2b0297b42b709reed@google.com /** Returns true if drawing is currently going to a layer (from saveLayer) 3057c2029367cea5479fa3b74fb0ca2b0297b42b709reed@google.com * rather than to the root device. 3067c2029367cea5479fa3b74fb0ca2b0297b42b709reed@google.com */ 3078f9ecbd3466d4330886b4c23b06e75b468c795adjunov@chromium.org virtual bool isDrawingToLayer() const; 3087c2029367cea5479fa3b74fb0ca2b0297b42b709reed@google.com 3098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Preconcat the current matrix with the specified translation 3108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param dx The distance to translate in X 3118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param dy The distance to translate in Y 3128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com returns true if the operation succeeded (e.g. did not overflow) 3138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual bool translate(SkScalar dx, SkScalar dy); 3158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Preconcat the current matrix with the specified scale. 3178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param sx The amount to scale in X 3188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param sy The amount to scale in Y 3198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com returns true if the operation succeeded (e.g. did not overflow) 3208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual bool scale(SkScalar sx, SkScalar sy); 3228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Preconcat the current matrix with the specified rotation. 3248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param degrees The amount to rotate, in degrees 3258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com returns true if the operation succeeded (e.g. did not overflow) 3268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual bool rotate(SkScalar degrees); 3288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Preconcat the current matrix with the specified skew. 3308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param sx The amount to skew in X 3318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param sy The amount to skew in Y 3328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com returns true if the operation succeeded (e.g. did not overflow) 3338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual bool skew(SkScalar sx, SkScalar sy); 3358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Preconcat the current matrix with the specified matrix. 3378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param matrix The matrix to preconcatenate with the current matrix 3388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return true if the operation succeeded (e.g. did not overflow) 3398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual bool concat(const SkMatrix& matrix); 3414b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 3428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Replace the current matrix with a copy of the specified matrix. 3438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param matrix The matrix that will be copied into the current matrix. 3448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void setMatrix(const SkMatrix& matrix); 3464b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 3478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Helper for setMatrix(identity). Sets the current matrix to identity. 3488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void resetMatrix(); 3508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Modify the current clip with the specified rectangle. 3528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param rect The rect to intersect with the current clip 3538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param op The region op to apply to the current clip 3548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return true if the canvas' clip is non-empty 3558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual bool clipRect(const SkRect& rect, 357071eef918d70b6ca8334bc1241d1ea6923e828d5reed@google.com SkRegion::Op op = SkRegion::kIntersect_Op, 358071eef918d70b6ca8334bc1241d1ea6923e828d5reed@google.com bool doAntiAlias = false); 3598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Modify the current clip with the specified path. 3618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param path The path to apply to the current clip 3628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param op The region op to apply to the current clip 3638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return true if the canvas' new clip is non-empty 3648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual bool clipPath(const SkPath& path, 366071eef918d70b6ca8334bc1241d1ea6923e828d5reed@google.com SkRegion::Op op = SkRegion::kIntersect_Op, 367071eef918d70b6ca8334bc1241d1ea6923e828d5reed@google.com bool doAntiAlias = false); 3688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Modify the current clip with the specified region. Note that unlike 3708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com clipRect() and clipPath() which transform their arguments by the current 3718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com matrix, clipRegion() assumes its argument is already in device 3728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com coordinates, and so no transformation is performed. 3738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param deviceRgn The region to apply to the current clip 3748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param op The region op to apply to the current clip 3758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return true if the canvas' new clip is non-empty 3768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual bool clipRegion(const SkRegion& deviceRgn, 3788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkRegion::Op op = SkRegion::kIntersect_Op); 3798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Helper for clipRegion(rgn, kReplace_Op). Sets the current clip to the 3818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com specified region. This does not intersect or in any other way account 3828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com for the existing clip region. 3838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param deviceRgn The region to copy into the current clip. 3848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return true if the new clip region is non-empty 3858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bool setClipRegion(const SkRegion& deviceRgn) { 3878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return this->clipRegion(deviceRgn, SkRegion::kReplace_Op); 3888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 3898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return true if the specified rectangle, after being transformed by the 3918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com current matrix, would lie completely outside of the current clip. Call 3928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com this to check if an area you intend to draw into is clipped out (and 3938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com therefore you can skip making the draw calls). 3948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param rect the rect to compare with the current clip 3958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return true if the rect (transformed by the canvas' matrix) does not 3968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com intersect with the canvas' clip 3978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3983b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com bool quickReject(const SkRect& rect) const; 3998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return true if the specified path, after being transformed by the 4018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com current matrix, would lie completely outside of the current clip. Call 4028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com this to check if an area you intend to draw into is clipped out (and 4038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com therefore you can skip making the draw calls). Note, for speed it may 4048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return false even if the path itself might not intersect the clip 4058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com (i.e. the bounds of the path intersects, but the path does not). 4068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param path The path to compare with the current clip 4078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return true if the path (transformed by the canvas' matrix) does not 4088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com intersect with the canvas' clip 4098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 4103b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com bool quickReject(const SkPath& path) const; 4118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return true if the horizontal band specified by top and bottom is 4138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com completely clipped out. This is a conservative calculation, meaning 4148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com that it is possible that if the method returns false, the band may still 4158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com in fact be clipped out, but the converse is not true. If this method 4168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com returns true, then the band is guaranteed to be clipped out. 4178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param top The top of the horizontal band to compare with the clip 4188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param bottom The bottom of the horizontal and to compare with the clip 4198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return true if the horizontal band is completely clipped out (i.e. does 4208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com not intersect the current clip) 4218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 4223b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com bool quickRejectY(SkScalar top, SkScalar bottom) const { 42392d2a299d2738e4369508ea1296981a2f1f8aadbdjsollen@google.com SkASSERT(SkScalarToCompareType(top) <= SkScalarToCompareType(bottom)); 4243b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com const SkRectCompareType& clipR = this->getLocalClipBoundsCompareType(); 42592d2a299d2738e4369508ea1296981a2f1f8aadbdjsollen@google.com // In the case where the clip is empty and we are provided with a 42692d2a299d2738e4369508ea1296981a2f1f8aadbdjsollen@google.com // negative top and positive bottom parameter then this test will return 42792d2a299d2738e4369508ea1296981a2f1f8aadbdjsollen@google.com // false even though it will be clipped. We have chosen to exclude that 42892d2a299d2738e4369508ea1296981a2f1f8aadbdjsollen@google.com // check as it is rare and would result double the comparisons. 42992d2a299d2738e4369508ea1296981a2f1f8aadbdjsollen@google.com return SkScalarToCompareType(top) >= clipR.fBottom 43092d2a299d2738e4369508ea1296981a2f1f8aadbdjsollen@google.com || SkScalarToCompareType(bottom) <= clipR.fTop; 43192d2a299d2738e4369508ea1296981a2f1f8aadbdjsollen@google.com } 4328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return the bounds of the current clip (in local coordinates) in the 4348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bounds parameter, and return true if it is non-empty. This can be useful 4358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com in a way similar to quickReject, in that it tells you that drawing 4368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com outside of these bounds will be clipped out. 4378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 4383b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com bool getClipBounds(SkRect* bounds) const; 4398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 440bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com /** Return the bounds of the current clip, in device coordinates; returns 441bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com true if non-empty. Maybe faster than getting the clip explicitly and 442bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com then taking its bounds. 443bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com */ 444bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com bool getClipDeviceBounds(SkIRect* bounds) const; 44574b461961607fa57a150a9282c410ef0cab38764vandebo@chromium.org 446bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com 4478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Fill the entire canvas' bitmap (restricted to the current clip) with the 448845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com specified ARGB color, using the specified mode. 4498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param a the alpha component (0..255) of the color to fill the canvas 4508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param r the red component (0..255) of the color to fill the canvas 4518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param g the green component (0..255) of the color to fill the canvas 4528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param b the blue component (0..255) of the color to fill the canvas 4538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param mode the mode to apply the color in (defaults to SrcOver) 4548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 4558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b, 456845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode); 4578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Fill the entire canvas' bitmap (restricted to the current clip) with the 459845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com specified color and mode. 4608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param color the color to draw with 4618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param mode the mode to apply the color in (defaults to SrcOver) 4628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 4638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawColor(SkColor color, 464845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode); 4658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4662a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com /** 4672a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * This erases the entire drawing surface to the specified color, 4682a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * irrespective of the clip. It does not blend with the previous pixels, 4692a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * but always overwrites them. 4702a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * 4712a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * It is roughly equivalent to the following: 4722a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * canvas.save(); 4732a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * canvas.clipRect(hugeRect, kReplace_Op); 4742a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * paint.setColor(color); 4752a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * paint.setXfermodeMode(kSrc_Mode); 4762a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * canvas.drawPaint(paint); 4772a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * canvas.restore(); 4782a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * though it is almost always much more efficient. 4792a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com */ 4802a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com virtual void clear(SkColor); 4812a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com 4822a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com /** 4832a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * Fill the entire canvas' bitmap (restricted to the current clip) with the 4842a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * specified paint. 4852a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com * @param paint The paint used to fill the canvas 4862a98181f048c11f21f52fbd99f803f5fd6118261reed@google.com */ 4878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawPaint(const SkPaint& paint); 4888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com enum PointMode { 4908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** drawPoints draws each point separately */ 4918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kPoints_PointMode, 4928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** drawPoints draws each pair of points as a line segment */ 4938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kLines_PointMode, 4948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** drawPoints draws the array of points as a polygon */ 4958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kPolygon_PointMode 4968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com }; 4978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw a series of points, interpreted based on the PointMode mode. For 4998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com all modes, the count parameter is interpreted as the total number of 5008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com points. For kLine mode, count/2 line segments are drawn. 5018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com For kPoint mode, each point is drawn centered at its coordinate, and its 5028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com size is specified by the paint's stroke-width. It draws as a square, 5038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com unless the paint's cap-type is round, in which the points are drawn as 5048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com circles. 5058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com For kLine mode, each pair of points is drawn as a line segment, 5068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com respecting the paint's settings for cap/join/width. 5078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com For kPolygon mode, the entire array is drawn as a series of connected 5088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com line segments. 5098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Note that, while similar, kLine and kPolygon modes draw slightly 5108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com differently than the equivalent path built with a series of moveto, 5118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com lineto calls, in that the path will draw all of its contours at once, 5128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com with no interactions if contours intersect each other (think XOR 5138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xfermode). drawPoints always draws each element one at a time. 5148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param mode PointMode specifying how to draw the array of points. 5158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param count The number of points in the array 5168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param pts Array of points to draw 5178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the points 5188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[], 5208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint& paint); 5218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Helper method for drawing a single point. See drawPoints() for a more 5238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com details. 5248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawPoint(SkScalar x, SkScalar y, const SkPaint& paint); 5264b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 5278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draws a single pixel in the specified color. 5288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param x The X coordinate of which pixel to draw 5298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param y The Y coordiante of which pixel to draw 5308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param color The color to draw 5318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawPoint(SkScalar x, SkScalar y, SkColor color); 5338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw a line segment with the specified start and stop x,y coordinates, 5358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com using the specified paint. NOTE: since a line is always "framed", the 5368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com paint's Style is ignored. 5378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param x0 The x-coordinate of the start point of the line 5388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param y0 The y-coordinate of the start point of the line 5398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param x1 The x-coordinate of the end point of the line 5408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param y1 The y-coordinate of the end point of the line 5418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the line 5428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, 5448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint& paint); 5458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified rectangle using the specified paint. The rectangle 5478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com will be filled or stroked based on the Style in the paint. 5488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param rect The rect to be drawn 5498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the rect 5508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawRect(const SkRect& rect, const SkPaint& paint); 5528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified rectangle using the specified paint. The rectangle 5548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com will be filled or framed based on the Style in the paint. 5558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param rect The rect to be drawn 5568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the rect 5578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawIRect(const SkIRect& rect, const SkPaint& paint) 5598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com { 5608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkRect r; 5618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com r.set(rect); // promotes the ints to scalars 5628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com this->drawRect(r, paint); 5638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 5644b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 5658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified rectangle using the specified paint. The rectangle 5668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com will be filled or framed based on the Style in the paint. 5678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param left The left side of the rectangle to be drawn 5688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param top The top side of the rectangle to be drawn 5698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param right The right side of the rectangle to be drawn 5708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param bottom The bottom side of the rectangle to be drawn 5718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the rect 5728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawRectCoords(SkScalar left, SkScalar top, SkScalar right, 5748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkScalar bottom, const SkPaint& paint); 5758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified oval using the specified paint. The oval will be 5778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com filled or framed based on the Style in the paint. 5788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param oval The rectangle bounds of the oval to be drawn 5798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the oval 5808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawOval(const SkRect& oval, const SkPaint&); 5828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified circle using the specified paint. If radius is <= 0, 5848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com then nothing will be drawn. The circle will be filled 5858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com or framed based on the Style in the paint. 5868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param cx The x-coordinate of the center of the cirle to be drawn 5878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param cy The y-coordinate of the center of the cirle to be drawn 5888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param radius The radius of the cirle to be drawn 5898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the circle 5908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 5918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawCircle(SkScalar cx, SkScalar cy, SkScalar radius, 5928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint& paint); 5938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified arc, which will be scaled to fit inside the 5958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com specified oval. If the sweep angle is >= 360, then the oval is drawn 5968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com completely. Note that this differs slightly from SkPath::arcTo, which 5978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com treats the sweep angle mod 360. 5988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param oval The bounds of oval used to define the shape of the arc 5998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param startAngle Starting angle (in degrees) where the arc begins 6008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param sweepAngle Sweep angle (in degrees) measured clockwise 6018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param useCenter true means include the center of the oval. For filling 6028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com this will draw a wedge. False means just use the arc. 6038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the arc 6048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 6058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, 6068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bool useCenter, const SkPaint& paint); 6078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified round-rect using the specified paint. The round-rect 6098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com will be filled or framed based on the Style in the paint. 6108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param rect The rectangular bounds of the roundRect to be drawn 6118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param rx The x-radius of the oval used to round the corners 6128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param ry The y-radius of the oval used to round the corners 6138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the roundRect 6148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 6158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawRoundRect(const SkRect& rect, SkScalar rx, SkScalar ry, 6168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint& paint); 6178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified path using the specified paint. The path will be 6198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com filled or framed based on the Style in the paint. 6208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param path The path to be drawn 6218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the path 6228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 6238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawPath(const SkPath& path, const SkPaint& paint); 6248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified bitmap, with its top/left corner at (x,y), using the 6268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com specified paint, transformed by the current matrix. Note: if the paint 6278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com contains a maskfilter that generates a mask which extends beyond the 6288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bitmap's original width/height, then the bitmap will be drawn as if it 6298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com were in a Shader with CLAMP mode. Thus the color outside of the original 6308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com width/height will be the edge color replicated. 6318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param bitmap The bitmap to be drawn 6328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param left The position of the left side of the bitmap being drawn 6338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param top The position of the top side of the bitmap being drawn 6348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the bitmap, or NULL 6358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 6368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, 6378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint* paint = NULL); 6388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified bitmap, with the specified matrix applied (before the 6408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com canvas' matrix is applied). 6418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param bitmap The bitmap to be drawn 6428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param src Optional: specify the subset of the bitmap to be drawn 6438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param dst The destination rectangle where the scaled/translated 6448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com image will be drawn 6458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the bitmap, or NULL 6468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 6478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src, 6488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkRect& dst, const SkPaint* paint = NULL); 6498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m, 6518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint* paint = NULL); 6524b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 653f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com /** 654f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * Draw the bitmap stretched differentially to fit into dst. 655f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * center is a rect within the bitmap, and logically divides the bitmap 656f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * into 9 sections (3x3). For example, if the middle pixel of a [5x5] 657f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * bitmap is the "center", then the center-rect should be [2, 2, 3, 3]. 658f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * 659f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * If the dst is >= the bitmap size, then... 660f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * - The 4 corners are not stretch at all. 661f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * - The sides are stretch in only one axis. 662f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * - The center is stretch in both axes. 663f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * Else, for each axis where dst < bitmap, 664f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * - The corners shrink proportionally 665f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com * - The sides (along the shrink axis) and center are not drawn 666f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com */ 667f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, 668f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com const SkRect& dst, const SkPaint* paint = NULL); 669f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com 6708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the specified bitmap, with its top/left corner at (x,y), 6718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com NOT transformed by the current matrix. Note: if the paint 6728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com contains a maskfilter that generates a mask which extends beyond the 6738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bitmap's original width/height, then the bitmap will be drawn as if it 6748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com were in a Shader with CLAMP mode. Thus the color outside of the original 6758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com width/height will be the edge color replicated. 6768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param bitmap The bitmap to be drawn 6778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param left The position of the left side of the bitmap being drawn 6788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param top The position of the top side of the bitmap being drawn 6798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used to draw the bitmap, or NULL 6808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 6818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawSprite(const SkBitmap& bitmap, int left, int top, 6828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint* paint = NULL); 6838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the text, with origin at (x,y), using the specified paint. 6858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com The origin is interpreted based on the Align setting in the paint. 6868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param text The text to be drawn 6878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param byteLength The number of bytes to read from the text parameter 6888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param x The x-coordinate of the origin of the text being drawn 6898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param y The y-coordinate of the origin of the text being drawn 6908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used for the text (e.g. color, size, style) 6918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 6928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawText(const void* text, size_t byteLength, SkScalar x, 6938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkScalar y, const SkPaint& paint); 6948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the text, with each character/glyph origin specified by the pos[] 6964b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com array. The origin is interpreted by the Align setting in the paint. 6978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param text The text to be drawn 6988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param byteLength The number of bytes to read from the text parameter 6998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param pos Array of positions, used to position each character 7008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used for the text (e.g. color, size, style) 7018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 7028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawPosText(const void* text, size_t byteLength, 7038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPoint pos[], const SkPaint& paint); 7044b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 7058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the text, with each character/glyph origin specified by the x 7068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com coordinate taken from the xpos[] array, and the y from the constY param. 7074b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com The origin is interpreted by the Align setting in the paint. 7088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param text The text to be drawn 7098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param byteLength The number of bytes to read from the text parameter 7108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param xpos Array of x-positions, used to position each character 7118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param constY The shared Y coordinate for all of the positions 7128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used for the text (e.g. color, size, style) 7138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 7148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawPosTextH(const void* text, size_t byteLength, 7158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkScalar xpos[], SkScalar constY, 7168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint& paint); 7174b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 7188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the text, with origin at (x,y), using the specified paint, along 7198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com the specified path. The paint's Align setting determins where along the 7208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com path to start the text. 7218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param text The text to be drawn 7228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param byteLength The number of bytes to read from the text parameter 7238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param path The path the text should follow for its baseline 7248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param hOffset The distance along the path to add to the text's 7258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com starting position 7268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param vOffset The distance above(-) or below(+) the path to 7278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com position the text 7288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used for the text 7298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 7308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void drawTextOnPathHV(const void* text, size_t byteLength, 7318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPath& path, SkScalar hOffset, 7328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkScalar vOffset, const SkPaint& paint); 7338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 7348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the text, with origin at (x,y), using the specified paint, along 7358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com the specified path. The paint's Align setting determins where along the 7368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com path to start the text. 7378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param text The text to be drawn 7388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param byteLength The number of bytes to read from the text parameter 7398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param path The path the text should follow for its baseline 7408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param matrix (may be null) Applied to the text before it is 7418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com mapped onto the path 7428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param paint The paint used for the text 7438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 7448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawTextOnPath(const void* text, size_t byteLength, 7458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPath& path, const SkMatrix* matrix, 7468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint& paint); 7478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 74856c69773aea56c6c6bd47bc7e7970dd081205184djsollen@google.com#ifdef SK_BUILD_FOR_ANDROID 749cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com /** Draw the text on path, with each character/glyph origin specified by the pos[] 750cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com array. The origin is interpreted by the Align setting in the paint. 751cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com @param text The text to be drawn 752cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com @param byteLength The number of bytes to read from the text parameter 753cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com @param pos Array of positions, used to position each character 754cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com @param paint The paint used for the text (e.g. color, size, style) 755cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com @param path The path to draw on 756cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com @param matrix The canvas matrix 757cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com */ 758cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com void drawPosTextOnPath(const void* text, size_t byteLength, 759cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com const SkPoint pos[], const SkPaint& paint, 760cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com const SkPath& path, const SkMatrix* matrix); 761cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com#endif 762cd9d69b9ce7eb301a9fd8d91b9f95fd99b07bae5djsollen@google.com 7638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the picture into this canvas. This method effective brackets the 7648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com playback of the picture's draw calls with save/restore, so the state 7658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com of this canvas will be unchanged after this call. This contrasts with 7668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com the more immediate method SkPicture::draw(), which does not bracket 7678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com the canvas with save/restore, thus the canvas may be left in a changed 7688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com state after the call. 7698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param picture The recorded drawing commands to playback into this 7708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com canvas. 7718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 7728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawPicture(SkPicture& picture); 7734b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 7748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com enum VertexMode { 7758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kTriangles_VertexMode, 7768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kTriangleStrip_VertexMode, 7778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com kTriangleFan_VertexMode 7788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com }; 7794b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 7808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Draw the array of vertices, interpreted as triangles (based on mode). 7818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param vmode How to interpret the array of vertices 7828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param vertexCount The number of points in the vertices array (and 7838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com corresponding texs and colors arrays if non-null) 7848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param vertices Array of vertices for the mesh 7858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param texs May be null. If not null, specifies the coordinate 7868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com in texture space for each vertex. 7878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param colors May be null. If not null, specifies a color for each 7888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com vertex, to be interpolated across the triangle. 7898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param xmode Used if both texs and colors are present. In this 7908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com case the colors are combined with the texture using mode, 7918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com before being drawn using the paint. If mode is null, then 792845fdaca174f4675e9acc164b510e3a5ffa9053creed@android.com kMultiply_Mode is used. 7938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param indices If not null, array of indices to reference into the 7948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com vertex (texs, colors) array. 7958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param indexCount number of entries in the indices array (if not null) 7964b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com @param paint Specifies the shader/texture if present. 7978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 7988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual void drawVertices(VertexMode vmode, int vertexCount, 7998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPoint vertices[], const SkPoint texs[], 8008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkColor colors[], SkXfermode* xmode, 8018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const uint16_t indices[], int indexCount, 8028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint& paint); 8038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 804cb60844b34766aad4151df5e87c144d4a57e9abereed@android.com /** Send a blob of data to the canvas. 805cb60844b34766aad4151df5e87c144d4a57e9abereed@android.com For canvases that draw, this call is effectively a no-op, as the data 806cb60844b34766aad4151df5e87c144d4a57e9abereed@android.com is not parsed, but just ignored. However, this call exists for 807cb60844b34766aad4151df5e87c144d4a57e9abereed@android.com subclasses like SkPicture's recording canvas, that can store the data 808cb60844b34766aad4151df5e87c144d4a57e9abereed@android.com and then play it back later (via another call to drawData). 809cb60844b34766aad4151df5e87c144d4a57e9abereed@android.com */ 810cb60844b34766aad4151df5e87c144d4a57e9abereed@android.com virtual void drawData(const void* data, size_t length); 811cb60844b34766aad4151df5e87c144d4a57e9abereed@android.com 8128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com ////////////////////////////////////////////////////////////////////////// 8134b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 8148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Get the current bounder object. 8158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com The bounder's reference count is unchaged. 8168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return the canva's bounder (or NULL). 8178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 8188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBounder* getBounder() const { return fBounder; } 8198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 8208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Set a new bounder (or NULL). 8218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com Pass NULL to clear any previous bounder. 8228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com As a convenience, the parameter passed is also returned. 8238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com If a previous bounder exists, its reference count is decremented. 8248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com If bounder is not NULL, its reference count is incremented. 8258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param bounder the new bounder (or NULL) to be installed in the canvas 8268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return the set bounder object 8278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 8288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual SkBounder* setBounder(SkBounder* bounder); 8294b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 8308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Get the current filter object. The filter's reference count is not 831dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com affected. The filter is saved/restored, just like the matrix and clip. 8328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return the canvas' filter (or NULL). 8338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 8348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkDrawFilter* getDrawFilter() const; 8354b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 8368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Set the new filter (or NULL). Pass NULL to clear any existing filter. 8378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com As a convenience, the parameter is returned. If an existing filter 8388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com exists, its refcnt is decrement. If the new filter is not null, its 839dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com refcnt is incremented. The filter is saved/restored, just like the 840dc3381fc8194a6192af39539c6ac9787b20209d3reed@android.com matrix and clip. 8418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @param filter the new filter (or NULL) 8428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return the new filter 8438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 8448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter); 8458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 8468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com ////////////////////////////////////////////////////////////////////////// 8478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 8488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return the current matrix on the canvas. 8498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com This does not account for the translate in any of the devices. 8508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com @return The current matrix on the canvas. 8518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 852a907ac3e3e3458fbb5d673c3feafb31fd7647b38junov@chromium.org const SkMatrix& getTotalMatrix() const; 8538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 854bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com enum ClipType { 855bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com kEmpty_ClipType = 0, 856bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com kRect_ClipType, 857bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com kComplex_ClipType 858bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com }; 859bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com 860bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com /** Returns a description of the total clip; may be cheaper than 861bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com getting the clip and querying it directly. 862bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com */ 863bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com ClipType getClipType() const; 864bcb671c82a7341253864cda3a5c46d396402d7fbtomhudson@google.com 8658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return the current device clip (concatenation of all clip calls). 866a707f6087455834fab5525a0c656cc5b6df2ff29reed@google.com * This does not account for the translate in any of the devices. 867a707f6087455834fab5525a0c656cc5b6df2ff29reed@google.com * @return the current device clip (concatenation of all clip calls). 8685e2457ef2eba0c3f2e4c8fc89be7f36659e4f3b1reed@google.com * 869a707f6087455834fab5525a0c656cc5b6df2ff29reed@google.com * DEPRECATED -- call getClipDeviceBounds() instead. 8705e2457ef2eba0c3f2e4c8fc89be7f36659e4f3b1reed@google.com */ 871a707f6087455834fab5525a0c656cc5b6df2ff29reed@google.com const SkRegion& getTotalClip() const; 8725e2457ef2eba0c3f2e4c8fc89be7f36659e4f3b1reed@google.com 87340a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com /** Return the clip stack. The clip stack stores all the individual 87440a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com * clips organized by the save/restore frame in which they were 87540a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com * added. 87640a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com * @return the current clip stack ("list" of individual clip elements) 87740a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com */ 87840a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com const SkClipStack* getClipStack() const { 87940a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com return &fClipStack; 88040a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com } 88140a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com 88290c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com void setExternalMatrix(const SkMatrix* = NULL); 88390c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com 88490c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com class ClipVisitor { 88590c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com public: 88620a550c6ea947f0ab239da1d4ecba209d76a98fdjustinlin@google.com virtual ~ClipVisitor(); 88790c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com virtual void clipRect(const SkRect&, SkRegion::Op, bool antialias) = 0; 88890c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com virtual void clipPath(const SkPath&, SkRegion::Op, bool antialias) = 0; 88990c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com }; 89090c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com 8915e2457ef2eba0c3f2e4c8fc89be7f36659e4f3b1reed@google.com /** 89290c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com * Replays the clip operations, back to front, that have been applied to 89390c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com * the canvas, calling the appropriate method on the visitor for each 89490c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com * clip. All clips have already been transformed into device space. 8957d7ca79c3e6e6be7b7849b0d9a7fe26effb89c38reed@google.com */ 89690c07ea1d0aa6b7f20252c43fe23ee5ddc1d23cbreed@google.com void replayClips(ClipVisitor*) const; 8978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 8988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /////////////////////////////////////////////////////////////////////////// 8998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** After calling saveLayer(), there can be any number of devices that make 9018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com up the top-most drawing area. LayerIter can be used to iterate through 9028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com those devices. Note that the iterator is only valid until the next API 9038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com call made on the canvas. Ownership of all pointers in the iterator stays 9048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com with the canvas, so none of them should be modified or deleted. 9058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 9067ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.org class SK_API LayerIter /*: SkNoncopyable*/ { 9078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com public: 9088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Initialize iterator with canvas, and set values for 1st device */ 9098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com LayerIter(SkCanvas*, bool skipEmptyClips); 9108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com ~LayerIter(); 9114b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 9128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return true if the iterator is done */ 9138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bool done() const { return fDone; } 9148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Cycle to the next device */ 9158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void next(); 9164b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 9178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // These reflect the current device in the iterator 9188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkDevice* device() const; 9208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkMatrix& matrix() const; 9218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkRegion& clip() const; 9228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint& paint() const; 9238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int x() const; 9248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int y() const; 9254b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 9268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com private: 9278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // used to embed the SkDrawIter object directly in our instance, w/o 9288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // having to expose that class def to the public. There is an assert 9298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // in our constructor to ensure that fStorage is large enough 9308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // (though needs to be a compile-time-assert!). We use intptr_t to work 9318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // safely with 32 and 64 bit machines (to ensure the storage is enough) 932f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com intptr_t fStorage[32]; 9338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class SkDrawIter* fImpl; // this points at fStorage 9348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkPaint fDefaultPaint; 9358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bool fDone; 9368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com }; 9378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprotected: 93974b461961607fa57a150a9282c410ef0cab38764vandebo@chromium.org // Returns the canvas to be used by DrawIter. Default implementation 9404370aedf7f55af74e9ebb4ad1c2e010c08236dfajunov@google.com // returns this. Subclasses that encapsulate an indirect canvas may 9414370aedf7f55af74e9ebb4ad1c2e010c08236dfajunov@google.com // need to overload this method. The impl must keep track of this, as it 9424370aedf7f55af74e9ebb4ad1c2e010c08236dfajunov@google.com // is not released or deleted by the caller. 9434370aedf7f55af74e9ebb4ad1c2e010c08236dfajunov@google.com virtual SkCanvas* canvasForDrawIter(); 9444370aedf7f55af74e9ebb4ad1c2e010c08236dfajunov@google.com 9458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // all of the drawBitmap variants call this guy 94649794c0cbd934545854a7b4091af5af7dfb46570reed@google.com void commonDrawBitmap(const SkBitmap&, const SkIRect*, const SkMatrix&, 94749794c0cbd934545854a7b4091af5af7dfb46570reed@google.com const SkPaint& paint); 9484b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 949a907ac3e3e3458fbb5d673c3feafb31fd7647b38junov@chromium.org // Clip rectangle bounds. Called internally by saveLayer. 950a907ac3e3e3458fbb5d673c3feafb31fd7647b38junov@chromium.org // returns false if the entire rectangle is entirely clipped out 951a907ac3e3e3458fbb5d673c3feafb31fd7647b38junov@chromium.org bool clipRectBounds(const SkRect* bounds, SaveFlags flags, 95249794c0cbd934545854a7b4091af5af7dfb46570reed@google.com SkIRect* intersection); 953a907ac3e3e3458fbb5d673c3feafb31fd7647b38junov@chromium.org 95497af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com // notify our surface (if we have one) that we are about to draw, so it 95597af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com // can perform copy-on-write or invalidate any cached images 95697af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com void predrawNotify(); 95797af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com 9588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate: 9598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class MCRec; 9608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9615c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com SkClipStack fClipStack; 9628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkDeque fMCStack; 9638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // points to top of stack 9648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com MCRec* fMCRec; 9658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // the first N recs that can fit here mean we won't call malloc 9668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com uint32_t fMCRecStorage[32]; 9678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBounder* fBounder; 969199f108f14a5f60a9c2205ffa79b26102a206ad0reed@android.com SkDevice* fLastDeviceToGainFocus; 970b0a7ace7cb2a7559bbc254a7c93698bc71bbd245junov@chromium.org int fSaveLayerCount; // number of successful saveLayer calls 9718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 97297af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com SkSurface_Base* fSurfaceBase; 97397af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com SkSurface_Base* getSurfaceBase() const { return fSurfaceBase; } 97497af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com void setSurfaceBase(SkSurface_Base* sb) { 97597af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com fSurfaceBase = sb; 97697af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com } 97797af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com friend class SkSurface_Base; 97897af1a64ae6bdddd346d8babfd9f188279dd6644reed@google.com 97940a1ae4df28810aa5aa5cf2627d8387b2dfb867arobertphillips@google.com void prepareForDeviceDraw(SkDevice*, const SkMatrix&, const SkRegion&); 9804b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 9818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bool fDeviceCMDirty; // cleared by updateDeviceCMCache() 9828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void updateDeviceCMCache(); 9838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com friend class SkDrawIter; // needs setupDrawForLayerDevice() 9858926b169f6a0dfa4c2129a98ec2aee205f0c8527reed@google.com friend class AutoDrawLooper; 9868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 98774b461961607fa57a150a9282c410ef0cab38764vandebo@chromium.org SkDevice* createLayerDevice(SkBitmap::Config, int width, int height, 988e97f0856a8044866b12527819d14cdfbcdfd96f2bsalomon@google.com bool isOpaque); 989e97f0856a8044866b12527819d14cdfbcdfd96f2bsalomon@google.com 9908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkDevice* init(SkDevice*); 991f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com 992f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com // internal methods are not virtual, so they can safely be called by other 993f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com // canvas apis, without confusing subclasses (like SkPictureRecording) 994f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com void internalDrawBitmap(const SkBitmap&, const SkIRect*, const SkMatrix& m, 9958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPaint* paint); 996f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com void internalDrawBitmapRect(const SkBitmap& bitmap, const SkIRect* src, 997f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com const SkRect& dst, const SkPaint* paint); 998f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com void internalDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, 999f0b5e1190af9807a027c0adba2f1380663c8e910reed@google.com const SkRect& dst, const SkPaint* paint); 1000fa6ac938e64fe11b442d05fe8a90ddac2d1951f9bsalomon@google.com void internalDrawPaint(const SkPaint& paint); 10018926b169f6a0dfa4c2129a98ec2aee205f0c8527reed@google.com int internalSaveLayer(const SkRect* bounds, const SkPaint* paint, 10028926b169f6a0dfa4c2129a98ec2aee205f0c8527reed@google.com SaveFlags, bool justForImageFilter); 10038926b169f6a0dfa4c2129a98ec2aee205f0c8527reed@google.com void internalDrawDevice(SkDevice*, int x, int y, const SkPaint*); 1004fa6ac938e64fe11b442d05fe8a90ddac2d1951f9bsalomon@google.com 10058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // shared by save() and saveLayer() 10068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int internalSave(SaveFlags flags); 10078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void internalRestore(); 100852c748b1691f02f90b27c35bc05074fcef709e66bungeman@google.com static void DrawRect(const SkDraw& draw, const SkPaint& paint, 100952c748b1691f02f90b27c35bc05074fcef709e66bungeman@google.com const SkRect& r, SkScalar textSize); 101052c748b1691f02f90b27c35bc05074fcef709e66bungeman@google.com static void DrawTextDecorations(const SkDraw& draw, const SkPaint& paint, 101152c748b1691f02f90b27c35bc05074fcef709e66bungeman@google.com const char text[], size_t byteLength, 101252c748b1691f02f90b27c35bc05074fcef709e66bungeman@google.com SkScalar x, SkScalar y); 10134b226023832011bc3bcdd1e5092ff0645ad0bdeereed@google.com 10148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /* These maintain a cache of the clip bounds in local coordinates, 10158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com (converted to 2s-compliment if floats are slow). 10168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 10178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com mutable SkRectCompareType fLocalBoundsCompareType; 10188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com mutable bool fLocalBoundsCompareTypeDirty; 10198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 10208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkRectCompareType& getLocalClipBoundsCompareType() const { 10213b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com if (fLocalBoundsCompareTypeDirty) { 10223b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com this->computeLocalClipBoundsCompareType(); 10233b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com fLocalBoundsCompareTypeDirty = false; 10248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 10253b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com return fLocalBoundsCompareType; 10268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 10273b3e895df6f8ee0f33010367c215944cd16a8334reed@google.com void computeLocalClipBoundsCompareType() const; 1028f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com 1029f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com SkMatrix fExternalMatrix, fExternalInverse; 1030f2b98d67dcb6fcb3120feede9c72016fc7b3ead8reed@android.com bool fUseExternalMatrix; 10315c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com 10325c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com class AutoValidateClip : ::SkNoncopyable { 10335c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com public: 10345c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com explicit AutoValidateClip(SkCanvas* canvas) : fCanvas(canvas) { 10355c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com fCanvas->validateClip(); 10365c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com } 10375c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com ~AutoValidateClip() { fCanvas->validateClip(); } 10385c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com 10395c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com private: 10405c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com const SkCanvas* fCanvas; 10415c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com }; 10425c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com 10435c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com#ifdef SK_DEBUG 10445c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com void validateClip() const; 10455c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com#else 10465c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com void validateClip() const {} 10475c3d1471e4908706cd053a5e2ea9ded3a6c2eaebreed@google.com#endif 104815e9d3e66e161ce23df30bc13f8a0c87d196b463robertphillips@google.com 104915e9d3e66e161ce23df30bc13f8a0c87d196b463robertphillips@google.com typedef SkRefCnt INHERITED; 10508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 10518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 10528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Stack helper class to automatically call restoreToCount() on the canvas 10538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com when this object goes out of scope. Use this to guarantee that the canvas 10548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com is restored to a known state. 10558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 10568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkAutoCanvasRestore : SkNoncopyable { 10578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 10588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkAutoCanvasRestore(SkCanvas* canvas, bool doSave) : fCanvas(canvas) { 10598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkASSERT(canvas); 10608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com fSaveCount = canvas->getSaveCount(); 10618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (doSave) { 10628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com canvas->save(); 10638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 10648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 10658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com ~SkAutoCanvasRestore() { 10668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com fCanvas->restoreToCount(fSaveCount); 10678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 10688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 10698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate: 10708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkCanvas* fCanvas; 10718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int fSaveCount; 10728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 10738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 10748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 1075