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| 1 /* |
| 2 * Copyright 2013 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 |
| 11 #if SK_SUPPORT_GPU |
| 12 #include "GrContext.h" |
| 13 |
| 14 namespace skiagm { |
| 15 extern GrContext* GetGr(); |
| 16 }; |
| 17 |
| 18 void GrContext::setMaxTextureSizeOverride(int maxTextureSizeOverride) { |
| 19 fMaxTextureSizeOverride = maxTextureSizeOverride; |
| 20 } |
| 21 #endif |
| 22 |
| 23 // Create a black&white checked texture with a 1-pixel red ring |
| 24 // around the outside edge |
| 25 static void make_red_ringed_bitmap(SkBitmap* result, int width, int height) { |
| 26 SkASSERT(0 == width % 2 && 0 == width % 2); |
| 27 |
| 28 result->setConfig(SkBitmap::kARGB_8888_Config, width, height); |
| 29 result->allocPixels(); |
| 30 SkAutoLockPixels lock(*result); |
| 31 |
| 32 SkPMColor* scanline = result->getAddr32(0, 0); |
| 33 for (int x = 0; x < width; ++x) { |
| 34 scanline[x] = SK_ColorRED; |
| 35 } |
| 36 |
| 37 for (int y = 1; y < height/2; ++y) { |
| 38 scanline = result->getAddr32(0, y); |
| 39 scanline[0] = SK_ColorRED; |
| 40 for (int x = 1; x < width/2; ++x) { |
| 41 scanline[x] = SK_ColorBLACK; |
| 42 } |
| 43 for (int x = width/2; x < width-1; ++x) { |
| 44 scanline[x] = SK_ColorWHITE; |
| 45 } |
| 46 scanline[width-1] = SK_ColorRED; |
| 47 } |
| 48 |
| 49 for (int y = height/2; y < height-1; ++y) { |
| 50 scanline = result->getAddr32(0, y); |
| 51 scanline[0] = SK_ColorRED; |
| 52 for (int x = 1; x < width/2; ++x) { |
| 53 scanline[x] = SK_ColorWHITE; |
| 54 } |
| 55 for (int x = width/2; x < width-1; ++x) { |
| 56 scanline[x] = SK_ColorBLACK; |
| 57 } |
| 58 scanline[width-1] = SK_ColorRED; |
| 59 } |
| 60 |
| 61 scanline = result->getAddr32(0, height-1); |
| 62 for (int x = 0; x < width; ++x) { |
| 63 scanline[x] = SK_ColorRED; |
| 64 } |
| 65 result->setIsOpaque(true); |
| 66 result->setImmutable(); |
| 67 } |
| 68 |
| 69 // This GM exercises the drawBitmapRectToRect "bleed" flag |
| 70 class BleedGM : public skiagm::GM { |
| 71 public: |
| 72 BleedGM() {} |
| 73 |
| 74 protected: |
| 75 virtual SkString onShortName() SK_OVERRIDE { |
| 76 return SkString("bleed"); |
| 77 } |
| 78 |
| 79 virtual SkISize onISize() SK_OVERRIDE { |
| 80 return SkISize::Make(kWidth, kHeight); |
| 81 } |
| 82 |
| 83 virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| 84 make_red_ringed_bitmap(&fBitmapSmall, kSmallTextureSize, kSmallTextureSi
ze); |
| 85 |
| 86 // To exercise the GPU's tiling path we need a texture |
| 87 // too big for the GPU to handle in one go |
| 88 make_red_ringed_bitmap(&fBitmapBig, 2*kMaxTextureSize, 2*kMaxTextureSize
); |
| 89 } |
| 90 |
| 91 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 92 #if SK_SUPPORT_GPU |
| 93 GrContext* ctx = skiagm::GetGr(); |
| 94 int oldMaxTextureSize = 0; |
| 95 if (NULL != ctx) { |
| 96 // shrink the max texture size so all our textures can be reasonably
sized |
| 97 oldMaxTextureSize = ctx->getMaxTextureSize(); |
| 98 ctx->setMaxTextureSizeOverride(kMaxTextureSize); |
| 99 } |
| 100 #endif |
| 101 |
| 102 canvas->clear(SK_ColorGRAY); |
| 103 |
| 104 SkPaint paint; |
| 105 |
| 106 // Bleeding only comes into play when filtering |
| 107 paint.setFilterBitmap(true); |
| 108 |
| 109 // carve out the center of the small bitmap |
| 110 SkRect src = SkRect::MakeXYWH(1, 1, |
| 111 kSmallTextureSize-2, |
| 112 kSmallTextureSize-2); |
| 113 SkRect dst = SkRect::MakeXYWH(10, 10, 100, 100); |
| 114 |
| 115 // first draw without bleeding |
| 116 canvas->drawBitmapRectToRect(fBitmapSmall, &src, dst, &paint); |
| 117 |
| 118 // then draw with bleeding |
| 119 dst = SkRect::MakeXYWH(120, 10, 100, 100); |
| 120 canvas->drawBitmapRectToRect(fBitmapSmall, &src, dst, &paint); |
| 121 |
| 122 // Next test out the GPU's tiling of large textures |
| 123 |
| 124 // first draw almost the whole thing |
| 125 src = SkRect::MakeXYWH(1, 1, |
| 126 SkIntToScalar(fBitmapBig.width()-2), |
| 127 SkIntToScalar(fBitmapBig.height()-2)); |
| 128 dst = SkRect::MakeXYWH(10, 120, 100, 100); |
| 129 |
| 130 // first without bleeding |
| 131 canvas->drawBitmapRectToRect(fBitmapBig, &src, dst, &paint); |
| 132 |
| 133 // then with bleeding |
| 134 dst = SkRect::MakeXYWH(120, 120, 100, 100); |
| 135 canvas->drawBitmapRectToRect(fBitmapBig, &src, dst, &paint); |
| 136 |
| 137 // next draw ~1/4 of the bitmap |
| 138 src = SkRect::MakeXYWH(1, 1, |
| 139 SkIntToScalar(fBitmapBig.width()/2-1), |
| 140 SkIntToScalar(fBitmapBig.height()/2-1)); |
| 141 dst = SkRect::MakeXYWH(10, 230, 100, 100); |
| 142 |
| 143 // first without bleeding |
| 144 canvas->drawBitmapRectToRect(fBitmapBig, &src, dst, &paint); |
| 145 |
| 146 // then with bleeding |
| 147 dst = SkRect::MakeXYWH(120, 230, 100, 100); |
| 148 canvas->drawBitmapRectToRect(fBitmapBig, &src, dst, &paint); |
| 149 |
| 150 #if SK_SUPPORT_GPU |
| 151 if (NULL != ctx) { |
| 152 ctx->setMaxTextureSizeOverride(oldMaxTextureSize); |
| 153 } |
| 154 #endif |
| 155 } |
| 156 |
| 157 private: |
| 158 static const int kWidth = 230; |
| 159 static const int kHeight = 340; |
| 160 |
| 161 static const int kSmallTextureSize = 4; |
| 162 static const int kMaxTextureSize = 32; |
| 163 |
| 164 SkBitmap fBitmapSmall; |
| 165 SkBitmap fBitmapBig; |
| 166 |
| 167 typedef GM INHERITED; |
| 168 }; |
| 169 |
| 170 DEF_GM( return new BleedGM(); ) |
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