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 21 class 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->allocN32Pixels(W, H); 31 fBM->eraseColor(SK_ColorWHITE); 32 33 const SkColor colors[] = { 34 SK_ColorBLUE, SK_ColorRED, SK_ColorBLACK, SK_ColorGREEN 35 }; 36 37 SkCanvas canvas(*fBM); 38 SkPaint paint; 39 paint.setAntiAlias(true); 40 paint.setStrokeWidth(SkIntToScalar(20)); 41 42 #if 0 43 for (int y = -H*2; y < H; y += 50) { 44 SkScalar yy = SkIntToScalar(y); 45 paint.setColor(colors[y/50 & 0x3]); 46 canvas.drawLine(0, yy, SkIntToScalar(W), yy + SkIntToScalar(W), 47 paint); 48 } 49 #else 50 for (int x = -W; x < W; x += 60) { 51 paint.setColor(colors[x/60 & 0x3]); 52 53 SkScalar xx = SkIntToScalar(x); 54 canvas.drawLine(xx, 0, xx, SkIntToScalar(H), 55 paint); 56 } 57 #endif 58 } 59 return *fBM; 60 } 61 62 public: 63 GiantBitmapGM(SkShader::TileMode mode, bool doFilter, bool doRotate) : fBM(NULL) { 64 fMode = mode; 65 fDoFilter = doFilter; 66 fDoRotate = doRotate; 67 } 68 69 virtual ~GiantBitmapGM() { 70 SkDELETE(fBM); 71 } 72 73 protected: 74 virtual uint32_t onGetFlags() const SK_OVERRIDE { 75 #ifdef SK_BUILD_FOR_ANDROID 76 return kSkipTiled_Flag; 77 #else 78 if (fDoFilter && fDoRotate && fMode != SkShader::kClamp_TileMode) { 79 return kSkipTiled_Flag; 80 } 81 return 0; 82 #endif 83 } 84 85 virtual SkString onShortName() { 86 SkString str("giantbitmap_"); 87 switch (fMode) { 88 case SkShader::kClamp_TileMode: 89 str.append("clamp"); 90 break; 91 case SkShader::kRepeat_TileMode: 92 str.append("repeat"); 93 break; 94 case SkShader::kMirror_TileMode: 95 str.append("mirror"); 96 break; 97 default: 98 break; 99 } 100 str.append(fDoFilter ? "_bilerp" : "_point"); 101 str.append(fDoRotate ? "_rotate" : "_scale"); 102 return str; 103 } 104 105 virtual SkISize onISize() { return SkISize::Make(640, 480); } 106 107 virtual void onDraw(SkCanvas* canvas) { 108 SkPaint paint; 109 110 SkMatrix m; 111 if (fDoRotate) { 112 // m.setRotate(SkIntToScalar(30), 0, 0); 113 m.setSkew(SK_Scalar1, 0, 0, 0); 114 // m.postScale(2*SK_Scalar1/3, 2*SK_Scalar1/3); 115 } else { 116 SkScalar scale = 11*SK_Scalar1/12; 117 m.setScale(scale, scale); 118 } 119 SkShader* s = SkShader::CreateBitmapShader(getBitmap(), fMode, fMode, &m); 120 121 paint.setShader(s)->unref(); 122 paint.setFilterLevel(fDoFilter ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel); 123 124 canvas->translate(SkIntToScalar(50), SkIntToScalar(50)); 125 126 // SkRect r = SkRect::MakeXYWH(-50, -50, 32, 16); 127 // canvas->drawRect(r, paint); return; 128 canvas->drawPaint(paint); 129 } 130 131 private: 132 typedef GM INHERITED; 133 }; 134 135 /////////////////////////////////////////////////////////////////////////////// 136 137 static skiagm::GM* G000(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode, false, false); } 138 static skiagm::GM* G100(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode, false, false); } 139 static skiagm::GM* G200(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode, false, false); } 140 static skiagm::GM* G010(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode, true, false); } 141 static skiagm::GM* G110(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode, true, false); } 142 static skiagm::GM* G210(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode, true, false); } 143 144 static skiagm::GM* G001(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode, false, true); } 145 static skiagm::GM* G101(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode, false, true); } 146 static skiagm::GM* G201(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode, false, true); } 147 static skiagm::GM* G011(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode, true, true); } 148 static skiagm::GM* G111(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode, true, true); } 149 static skiagm::GM* G211(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode, true, true); } 150 151 static skiagm::GMRegistry reg000(G000); 152 static skiagm::GMRegistry reg100(G100); 153 static skiagm::GMRegistry reg200(G200); 154 static skiagm::GMRegistry reg010(G010); 155 static skiagm::GMRegistry reg110(G110); 156 static skiagm::GMRegistry reg210(G210); 157 158 static skiagm::GMRegistry reg001(G001); 159 static skiagm::GMRegistry reg101(G101); 160 static skiagm::GMRegistry reg201(G201); 161 static skiagm::GMRegistry reg011(G011); 162 static skiagm::GMRegistry reg111(G111); 163 static skiagm::GMRegistry reg211(G211); 164
