1/* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#include "gm.h" 9#include "SkCanvas.h" 10#include "SkColorPriv.h" 11#include "SkShader.h" 12 13/* 14 * Want to ensure that our bitmap sampler (in bitmap shader) keeps plenty of 15 * precision when scaling very large images (where the dx might get very small. 16 */ 17 18#define W 257 19#define H 161 20 21class GiantBitmapGM : public skiagm::GM { 22 SkBitmap* fBM; 23 SkShader::TileMode fMode; 24 bool fDoFilter; 25 bool fDoRotate; 26 27 const SkBitmap& getBitmap() { 28 if (NULL == fBM) { 29 fBM = new SkBitmap; 30 fBM->setConfig(SkBitmap::kARGB_8888_Config, W, H); 31 fBM->allocPixels(); 32 fBM->eraseColor(SK_ColorWHITE); 33 34 const SkColor colors[] = { 35 SK_ColorBLUE, SK_ColorRED, SK_ColorBLACK, SK_ColorGREEN 36 }; 37 38 SkCanvas canvas(*fBM); 39 SkPaint paint; 40 paint.setAntiAlias(true); 41 paint.setStrokeWidth(SkIntToScalar(20)); 42 43#if 0 44 for (int y = -H*2; y < H; y += 50) { 45 SkScalar yy = SkIntToScalar(y); 46 paint.setColor(colors[y/50 & 0x3]); 47 canvas.drawLine(0, yy, SkIntToScalar(W), yy + SkIntToScalar(W), 48 paint); 49 } 50#else 51 for (int x = -W; x < W; x += 60) { 52 paint.setColor(colors[x/60 & 0x3]); 53 54 SkScalar xx = SkIntToScalar(x); 55 canvas.drawLine(xx, 0, xx, SkIntToScalar(H), 56 paint); 57 } 58#endif 59 } 60 return *fBM; 61 } 62 63public: 64 GiantBitmapGM(SkShader::TileMode mode, bool doFilter, bool doRotate) : fBM(NULL) { 65 fMode = mode; 66 fDoFilter = doFilter; 67 fDoRotate = doRotate; 68 } 69 70 virtual ~GiantBitmapGM() { 71 SkDELETE(fBM); 72 } 73 74protected: 75 virtual SkString onShortName() { 76 SkString str("giantbitmap_"); 77 switch (fMode) { 78 case SkShader::kClamp_TileMode: 79 str.append("clamp"); 80 break; 81 case SkShader::kRepeat_TileMode: 82 str.append("repeat"); 83 break; 84 case SkShader::kMirror_TileMode: 85 str.append("mirror"); 86 break; 87 default: 88 break; 89 } 90 str.append(fDoFilter ? "_bilerp" : "_point"); 91 str.append(fDoRotate ? "_rotate" : "_scale"); 92 return str; 93 } 94 95 virtual SkISize onISize() { return SkISize::Make(640, 480); } 96 97 virtual void onDraw(SkCanvas* canvas) { 98 SkPaint paint; 99 SkShader* s = SkShader::CreateBitmapShader(getBitmap(), fMode, fMode); 100 101 SkMatrix m; 102 if (fDoRotate) { 103// m.setRotate(SkIntToScalar(30), 0, 0); 104 m.setSkew(SK_Scalar1, 0, 0, 0); 105// m.postScale(2*SK_Scalar1/3, 2*SK_Scalar1/3); 106 } else { 107 SkScalar scale = 11*SK_Scalar1/12; 108 m.setScale(scale, scale); 109 } 110 s->setLocalMatrix(m); 111 112 paint.setShader(s)->unref(); 113 paint.setFilterBitmap(fDoFilter); 114 115 canvas->translate(SkIntToScalar(50), SkIntToScalar(50)); 116 117// SkRect r = SkRect::MakeXYWH(-50, -50, 32, 16); 118// canvas->drawRect(r, paint); return; 119 canvas->drawPaint(paint); 120 } 121 122private: 123 typedef GM INHERITED; 124}; 125 126/////////////////////////////////////////////////////////////////////////////// 127 128static skiagm::GM* G000(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode, false, false); } 129static skiagm::GM* G100(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode, false, false); } 130static skiagm::GM* G200(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode, false, false); } 131static skiagm::GM* G010(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode, true, false); } 132static skiagm::GM* G110(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode, true, false); } 133static skiagm::GM* G210(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode, true, false); } 134 135static skiagm::GM* G001(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode, false, true); } 136static skiagm::GM* G101(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode, false, true); } 137static skiagm::GM* G201(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode, false, true); } 138static skiagm::GM* G011(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode, true, true); } 139static skiagm::GM* G111(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode, true, true); } 140static skiagm::GM* G211(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode, true, true); } 141 142static skiagm::GMRegistry reg000(G000); 143static skiagm::GMRegistry reg100(G100); 144static skiagm::GMRegistry reg200(G200); 145static skiagm::GMRegistry reg010(G010); 146static skiagm::GMRegistry reg110(G110); 147static skiagm::GMRegistry reg210(G210); 148 149static skiagm::GMRegistry reg001(G001); 150static skiagm::GMRegistry reg101(G101); 151static skiagm::GMRegistry reg201(G201); 152static skiagm::GMRegistry reg011(G011); 153static skiagm::GMRegistry reg111(G111); 154static skiagm::GMRegistry reg211(G211); 155