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 sk_tool_utils::set_portable_typeface(&paint); 38 paint.setColor(0xD000D000); 39 paint.setTextSize(SkIntToScalar(96)); 40 const char* str = "e"; 41 canvas.drawText(str, strlen(str), SkIntToScalar(15), SkIntToScalar(65), paint); 42 } 43 44 void make_checkerboard() { 45 fCheckerboard.allocN32Pixels(80, 80); 46 SkCanvas canvas(fCheckerboard); 47 canvas.clear(0x00000000); 48 SkPaint darkPaint; 49 darkPaint.setColor(0xFF404040); 50 SkPaint lightPaint; 51 lightPaint.setColor(0xFFA0A0A0); 52 for (int y = 0; y < 80; y += 16) { 53 for (int x = 0; x < 80; x += 16) { 54 canvas.save(); 55 canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); 56 canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint); 57 canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint); 58 canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint); 59 canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint); 60 canvas.restore(); 61 } 62 } 63 } 64 65 virtual SkISize onISize() SK_OVERRIDE { 66 return SkISize::Make(WIDTH, HEIGHT); 67 } 68 69 static void drawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint, 70 int x, int y) { 71 canvas->save(); 72 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 73 canvas->clipRect(SkRect::MakeWH( 74 SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height()))); 75 canvas->drawBitmap(bitmap, 0, 0, &paint); 76 canvas->restore(); 77 } 78 79 static void drawClippedPaint(SkCanvas* canvas, const SkRect& rect, const SkPaint& paint, 80 int x, int y) { 81 canvas->save(); 82 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 83 canvas->clipRect(rect); 84 canvas->drawPaint(paint); 85 canvas->restore(); 86 } 87 88 virtual void onOnceBeforeDraw() SK_OVERRIDE { 89 make_bitmap(); 90 make_checkerboard(); 91 } 92 93 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 94 canvas->clear(0x00000000); 95 SkPaint paint; 96 97 const struct { 98 SkXfermode::Mode fMode; 99 const char* fLabel; 100 } gModes[] = { 101 { SkXfermode::kClear_Mode, "Clear" }, 102 { SkXfermode::kSrc_Mode, "Src" }, 103 { SkXfermode::kDst_Mode, "Dst" }, 104 { SkXfermode::kSrcOver_Mode, "SrcOver" }, 105 { SkXfermode::kDstOver_Mode, "DstOver" }, 106 { SkXfermode::kSrcIn_Mode, "SrcIn" }, 107 { SkXfermode::kDstIn_Mode, "DstIn" }, 108 { SkXfermode::kSrcOut_Mode, "SrcOut" }, 109 { SkXfermode::kDstOut_Mode, "DstOut" }, 110 { SkXfermode::kSrcATop_Mode, "SrcATop" }, 111 { SkXfermode::kDstATop_Mode, "DstATop" }, 112 { SkXfermode::kXor_Mode, "Xor" }, 113 114 { SkXfermode::kPlus_Mode, "Plus" }, 115 { SkXfermode::kModulate_Mode, "Modulate" }, 116 { SkXfermode::kScreen_Mode, "Screen" }, 117 { SkXfermode::kOverlay_Mode, "Overlay" }, 118 { SkXfermode::kDarken_Mode, "Darken" }, 119 { SkXfermode::kLighten_Mode, "Lighten" }, 120 { SkXfermode::kColorDodge_Mode, "ColorDodge" }, 121 { SkXfermode::kColorBurn_Mode, "ColorBurn" }, 122 { SkXfermode::kHardLight_Mode, "HardLight" }, 123 { SkXfermode::kSoftLight_Mode, "SoftLight" }, 124 { SkXfermode::kDifference_Mode, "Difference" }, 125 { SkXfermode::kExclusion_Mode, "Exclusion" }, 126 { SkXfermode::kMultiply_Mode, "Multiply" }, 127 { SkXfermode::kHue_Mode, "Hue" }, 128 { SkXfermode::kSaturation_Mode, "Saturation" }, 129 { SkXfermode::kColor_Mode, "Color" }, 130 { SkXfermode::kLuminosity_Mode, "Luminosity" }, 131 }; 132 133 int x = 0, y = 0; 134 SkAutoTUnref<SkImageFilter> background(SkBitmapSource::Create(fCheckerboard)); 135 for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) { 136 SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(gModes[i].fMode)); 137 SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background)); 138 paint.setImageFilter(filter); 139 drawClippedBitmap(canvas, fBitmap, paint, x, y); 140 x += fBitmap.width() + MARGIN; 141 if (x + fBitmap.width() > WIDTH) { 142 x = 0; 143 y += fBitmap.height() + MARGIN; 144 } 145 } 146 // Test arithmetic mode as image filter 147 SkAutoTUnref<SkXfermode> mode(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0)); 148 SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background)); 149 paint.setImageFilter(filter); 150 drawClippedBitmap(canvas, fBitmap, paint, x, y); 151 x += fBitmap.width() + MARGIN; 152 if (x + fBitmap.width() > WIDTH) { 153 x = 0; 154 y += fBitmap.height() + MARGIN; 155 } 156 // Test NULL mode 157 filter.reset(SkXfermodeImageFilter::Create(NULL, background)); 158 paint.setImageFilter(filter); 159 drawClippedBitmap(canvas, fBitmap, paint, x, y); 160 x += fBitmap.width() + MARGIN; 161 if (x + fBitmap.width() > WIDTH) { 162 x = 0; 163 y += fBitmap.height() + MARGIN; 164 } 165 SkRect clipRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() + 4), 166 SkIntToScalar(fBitmap.height() + 4)); 167 // Test offsets on SrcMode (uses fixed-function blend) 168 SkAutoTUnref<SkImageFilter> foreground(SkBitmapSource::Create(fBitmap)); 169 SkAutoTUnref<SkImageFilter> offsetForeground(SkOffsetImageFilter::Create( 170 SkIntToScalar(4), SkIntToScalar(-4), foreground)); 171 SkAutoTUnref<SkImageFilter> offsetBackground(SkOffsetImageFilter::Create( 172 SkIntToScalar(4), SkIntToScalar(4), background)); 173 mode.reset(SkXfermode::Create(SkXfermode::kSrcOver_Mode)); 174 filter.reset(SkXfermodeImageFilter::Create(mode, offsetBackground, offsetForeground)); 175 paint.setImageFilter(filter); 176 drawClippedPaint(canvas, clipRect, paint, x, y); 177 x += fBitmap.width() + MARGIN; 178 if (x + fBitmap.width() > WIDTH) { 179 x = 0; 180 y += fBitmap.height() + MARGIN; 181 } 182 // Test offsets on Darken (uses shader blend) 183 mode.reset(SkXfermode::Create(SkXfermode::kDarken_Mode)); 184 filter.reset(SkXfermodeImageFilter::Create(mode, offsetBackground, offsetForeground)); 185 paint.setImageFilter(filter); 186 drawClippedPaint(canvas, clipRect, paint, x, y); 187 x += fBitmap.width() + MARGIN; 188 if (x + fBitmap.width() > WIDTH) { 189 x = 0; 190 y += fBitmap.height() + MARGIN; 191 } 192 // Test cropping 193 static const size_t nbSamples = 3; 194 SkXfermode::Mode sampledModes[nbSamples] = {SkXfermode::kOverlay_Mode, 195 SkXfermode::kSrcOver_Mode, 196 SkXfermode::kPlus_Mode}; 197 int offsets[nbSamples][4] = {{ 10, 10, -16, -16}, 198 { 10, 10, 10, 10}, 199 {-10, -10, -6, -6}}; 200 for (size_t i = 0; i < nbSamples; ++i) { 201 SkIRect cropRect = SkIRect::MakeXYWH(offsets[i][0], 202 offsets[i][1], 203 fBitmap.width() + offsets[i][2], 204 fBitmap.height() + offsets[i][3]); 205 SkImageFilter::CropRect rect(SkRect::Make(cropRect)); 206 mode.reset(SkXfermode::Create(sampledModes[i])); 207 filter.reset(SkXfermodeImageFilter::Create( 208 mode, offsetBackground, offsetForeground, &rect)); 209 paint.setImageFilter(filter); 210 drawClippedPaint(canvas, clipRect, paint, x, y); 211 x += fBitmap.width() + MARGIN; 212 if (x + fBitmap.width() > WIDTH) { 213 x = 0; 214 y += fBitmap.height() + MARGIN; 215 } 216 } 217 } 218private: 219 SkBitmap fBitmap, fCheckerboard; 220 typedef GM INHERITED; 221}; 222 223////////////////////////////////////////////////////////////////////////////// 224 225DEF_GM( return new XfermodeImageFilterGM; ); 226 227} 228