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 "SkArithmeticMode.h" 10#include "SkOffsetImageFilter.h" 11#include "SkXfermodeImageFilter.h" 12#include "SkBitmapSource.h" 13 14#define WIDTH 600 15#define HEIGHT 600 16#define MARGIN 12 17 18namespace skiagm { 19 20class XfermodeImageFilterGM : public GM { 21public: 22 XfermodeImageFilterGM(){ 23 this->setBGColor(0xFF000000); 24 } 25 26protected: 27 virtual SkString onShortName() SK_OVERRIDE { 28 return SkString("xfermodeimagefilter"); 29 } 30 31 void make_bitmap() { 32 fBitmap.allocN32Pixels(80, 80); 33 SkCanvas canvas(fBitmap); 34 canvas.clear(0x00000000); 35 SkPaint paint; 36 paint.setAntiAlias(true); 37 paint.setColor(0xD000D000); 38 paint.setTextSize(SkIntToScalar(96)); 39 const char* str = "e"; 40 canvas.drawText(str, strlen(str), SkIntToScalar(15), SkIntToScalar(65), paint); 41 } 42 43 void make_checkerboard() { 44 fCheckerboard.allocN32Pixels(80, 80); 45 SkCanvas canvas(fCheckerboard); 46 canvas.clear(0x00000000); 47 SkPaint darkPaint; 48 darkPaint.setColor(0xFF404040); 49 SkPaint lightPaint; 50 lightPaint.setColor(0xFFA0A0A0); 51 for (int y = 0; y < 80; y += 16) { 52 for (int x = 0; x < 80; x += 16) { 53 canvas.save(); 54 canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); 55 canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint); 56 canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint); 57 canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint); 58 canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint); 59 canvas.restore(); 60 } 61 } 62 } 63 64 virtual SkISize onISize() SK_OVERRIDE { 65 return SkISize::Make(WIDTH, HEIGHT); 66 } 67 68 static void drawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint, 69 int x, int y) { 70 canvas->save(); 71 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 72 canvas->clipRect(SkRect::MakeWH( 73 SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height()))); 74 canvas->drawBitmap(bitmap, 0, 0, &paint); 75 canvas->restore(); 76 } 77 78 static void drawClippedPaint(SkCanvas* canvas, const SkRect& rect, const SkPaint& paint, 79 int x, int y) { 80 canvas->save(); 81 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 82 canvas->clipRect(rect); 83 canvas->drawPaint(paint); 84 canvas->restore(); 85 } 86 87 virtual void onOnceBeforeDraw() SK_OVERRIDE { 88 make_bitmap(); 89 make_checkerboard(); 90 } 91 92 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 93 canvas->clear(0x00000000); 94 SkPaint paint; 95 96 const struct { 97 SkXfermode::Mode fMode; 98 const char* fLabel; 99 } gModes[] = { 100 { SkXfermode::kClear_Mode, "Clear" }, 101 { SkXfermode::kSrc_Mode, "Src" }, 102 { SkXfermode::kDst_Mode, "Dst" }, 103 { SkXfermode::kSrcOver_Mode, "SrcOver" }, 104 { SkXfermode::kDstOver_Mode, "DstOver" }, 105 { SkXfermode::kSrcIn_Mode, "SrcIn" }, 106 { SkXfermode::kDstIn_Mode, "DstIn" }, 107 { SkXfermode::kSrcOut_Mode, "SrcOut" }, 108 { SkXfermode::kDstOut_Mode, "DstOut" }, 109 { SkXfermode::kSrcATop_Mode, "SrcATop" }, 110 { SkXfermode::kDstATop_Mode, "DstATop" }, 111 { SkXfermode::kXor_Mode, "Xor" }, 112 113 { SkXfermode::kPlus_Mode, "Plus" }, 114 { SkXfermode::kModulate_Mode, "Modulate" }, 115 { SkXfermode::kScreen_Mode, "Screen" }, 116 { SkXfermode::kOverlay_Mode, "Overlay" }, 117 { SkXfermode::kDarken_Mode, "Darken" }, 118 { SkXfermode::kLighten_Mode, "Lighten" }, 119 { SkXfermode::kColorDodge_Mode, "ColorDodge" }, 120 { SkXfermode::kColorBurn_Mode, "ColorBurn" }, 121 { SkXfermode::kHardLight_Mode, "HardLight" }, 122 { SkXfermode::kSoftLight_Mode, "SoftLight" }, 123 { SkXfermode::kDifference_Mode, "Difference" }, 124 { SkXfermode::kExclusion_Mode, "Exclusion" }, 125 { SkXfermode::kMultiply_Mode, "Multiply" }, 126 { SkXfermode::kHue_Mode, "Hue" }, 127 { SkXfermode::kSaturation_Mode, "Saturation" }, 128 { SkXfermode::kColor_Mode, "Color" }, 129 { SkXfermode::kLuminosity_Mode, "Luminosity" }, 130 }; 131 132 int x = 0, y = 0; 133 SkAutoTUnref<SkImageFilter> background(SkBitmapSource::Create(fCheckerboard)); 134 for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) { 135 SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(gModes[i].fMode)); 136 SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background)); 137 paint.setImageFilter(filter); 138 drawClippedBitmap(canvas, fBitmap, paint, x, y); 139 x += fBitmap.width() + MARGIN; 140 if (x + fBitmap.width() > WIDTH) { 141 x = 0; 142 y += fBitmap.height() + MARGIN; 143 } 144 } 145 // Test arithmetic mode as image filter 146 SkAutoTUnref<SkXfermode> mode(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0)); 147 SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background)); 148 paint.setImageFilter(filter); 149 drawClippedBitmap(canvas, fBitmap, paint, x, y); 150 x += fBitmap.width() + MARGIN; 151 if (x + fBitmap.width() > WIDTH) { 152 x = 0; 153 y += fBitmap.height() + MARGIN; 154 } 155 // Test NULL mode 156 filter.reset(SkXfermodeImageFilter::Create(NULL, background)); 157 paint.setImageFilter(filter); 158 drawClippedBitmap(canvas, fBitmap, paint, x, y); 159 x += fBitmap.width() + MARGIN; 160 if (x + fBitmap.width() > WIDTH) { 161 x = 0; 162 y += fBitmap.height() + MARGIN; 163 } 164 SkRect clipRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() + 4), 165 SkIntToScalar(fBitmap.height() + 4)); 166 // Test offsets on SrcMode (uses fixed-function blend) 167 SkAutoTUnref<SkImageFilter> foreground(SkBitmapSource::Create(fBitmap)); 168 SkAutoTUnref<SkImageFilter> offsetForeground(SkOffsetImageFilter::Create( 169 SkIntToScalar(4), SkIntToScalar(-4), foreground)); 170 SkAutoTUnref<SkImageFilter> offsetBackground(SkOffsetImageFilter::Create( 171 SkIntToScalar(4), SkIntToScalar(4), background)); 172 mode.reset(SkXfermode::Create(SkXfermode::kSrcOver_Mode)); 173 filter.reset(SkXfermodeImageFilter::Create(mode, offsetBackground, offsetForeground)); 174 paint.setImageFilter(filter); 175 drawClippedPaint(canvas, clipRect, paint, x, y); 176 x += fBitmap.width() + MARGIN; 177 if (x + fBitmap.width() > WIDTH) { 178 x = 0; 179 y += fBitmap.height() + MARGIN; 180 } 181 // Test offsets on Darken (uses shader blend) 182 mode.reset(SkXfermode::Create(SkXfermode::kDarken_Mode)); 183 filter.reset(SkXfermodeImageFilter::Create(mode, offsetBackground, offsetForeground)); 184 paint.setImageFilter(filter); 185 drawClippedPaint(canvas, clipRect, paint, x, y); 186 x += fBitmap.width() + MARGIN; 187 if (x + fBitmap.width() > WIDTH) { 188 x = 0; 189 y += fBitmap.height() + MARGIN; 190 } 191 // Test cropping 192 static const size_t nbSamples = 3; 193 SkXfermode::Mode sampledModes[nbSamples] = {SkXfermode::kOverlay_Mode, 194 SkXfermode::kSrcOver_Mode, 195 SkXfermode::kPlus_Mode}; 196 int offsets[nbSamples][4] = {{ 10, 10, -16, -16}, 197 { 10, 10, 10, 10}, 198 {-10, -10, -6, -6}}; 199 for (size_t i = 0; i < nbSamples; ++i) { 200 SkIRect cropRect = SkIRect::MakeXYWH(offsets[i][0], 201 offsets[i][1], 202 fBitmap.width() + offsets[i][2], 203 fBitmap.height() + offsets[i][3]); 204 SkImageFilter::CropRect rect(SkRect::Make(cropRect)); 205 mode.reset(SkXfermode::Create(sampledModes[i])); 206 filter.reset(SkXfermodeImageFilter::Create( 207 mode, offsetBackground, offsetForeground, &rect)); 208 paint.setImageFilter(filter); 209 drawClippedPaint(canvas, clipRect, paint, x, y); 210 x += fBitmap.width() + MARGIN; 211 if (x + fBitmap.width() > WIDTH) { 212 x = 0; 213 y += fBitmap.height() + MARGIN; 214 } 215 } 216 } 217private: 218 SkBitmap fBitmap, fCheckerboard; 219 typedef GM INHERITED; 220}; 221 222////////////////////////////////////////////////////////////////////////////// 223 224DEF_GM( return new XfermodeImageFilterGM; ); 225 226} 227