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 "SkColorFilterImageFilter.h" 11 #include "SkGradientShader.h" 12 #include "SkTableColorFilter.h" 13 14 static SkShader* make_shader0(int w, int h) { 15 SkPoint pts[] = { {0, 0}, {SkIntToScalar(w), SkIntToScalar(h)} }; 16 SkColor colors[] = { 17 SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN, 18 SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE 19 }; 20 return SkGradientShader::CreateLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors), 21 SkShader::kClamp_TileMode); 22 } 23 static void make_bm0(SkBitmap* bm) { 24 int W = 120; 25 int H = 120; 26 bm->allocN32Pixels(W, H); 27 bm->eraseColor(SK_ColorTRANSPARENT); 28 29 SkCanvas canvas(*bm); 30 SkPaint paint; 31 paint.setShader(make_shader0(W, H))->unref(); 32 canvas.drawPaint(paint); 33 } 34 static SkShader* make_shader1(int w, int h) { 35 SkScalar cx = SkIntToScalar(w)/2; 36 SkScalar cy = SkIntToScalar(h)/2; 37 SkColor colors[] = { 38 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, 39 }; 40 return SkGradientShader::CreateRadial(SkPoint::Make(cx, cy), cx, colors, nullptr, 41 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode); 42 } 43 static void make_bm1(SkBitmap* bm) { 44 int W = 120; 45 int H = 120; 46 SkScalar cx = SkIntToScalar(W)/2; 47 SkScalar cy = SkIntToScalar(H)/2; 48 bm->allocN32Pixels(W, H); 49 bm->eraseColor(SK_ColorTRANSPARENT); 50 51 SkCanvas canvas(*bm); 52 SkPaint paint; 53 paint.setShader(make_shader1(W, H))->unref(); 54 paint.setAntiAlias(true); 55 canvas.drawCircle(cx, cy, cx, paint); 56 } 57 58 static void make_table0(uint8_t table[]) { 59 for (int i = 0; i < 256; ++i) { 60 int n = i >> 5; 61 table[i] = (n << 5) | (n << 2) | (n >> 1); 62 } 63 } 64 static void make_table1(uint8_t table[]) { 65 for (int i = 0; i < 256; ++i) { 66 table[i] = i * i / 255; 67 } 68 } 69 static void make_table2(uint8_t table[]) { 70 for (int i = 0; i < 256; ++i) { 71 float fi = i / 255.0f; 72 table[i] = static_cast<uint8_t>(sqrtf(fi) * 255); 73 } 74 } 75 76 static SkColorFilter* make_null_cf() { 77 return nullptr; 78 } 79 80 static SkColorFilter* make_cf0() { 81 uint8_t table[256]; make_table0(table); 82 return SkTableColorFilter::Create(table); 83 } 84 static SkColorFilter* make_cf1() { 85 uint8_t table[256]; make_table1(table); 86 return SkTableColorFilter::Create(table); 87 } 88 static SkColorFilter* make_cf2() { 89 uint8_t table[256]; make_table2(table); 90 return SkTableColorFilter::Create(table); 91 } 92 static SkColorFilter* make_cf3() { 93 uint8_t table0[256]; make_table0(table0); 94 uint8_t table1[256]; make_table1(table1); 95 uint8_t table2[256]; make_table2(table2); 96 return SkTableColorFilter::CreateARGB(nullptr, table0, table1, table2); 97 } 98 99 class TableColorFilterGM : public skiagm::GM { 100 public: 101 TableColorFilterGM() {} 102 103 protected: 104 virtual SkString onShortName() { 105 return SkString("tablecolorfilter"); 106 } 107 108 virtual SkISize onISize() { 109 return SkISize::Make(700, 1650); 110 } 111 112 virtual void onDraw(SkCanvas* canvas) { 113 canvas->drawColor(sk_tool_utils::color_to_565(0xFFDDDDDD)); 114 canvas->translate(20, 20); 115 116 117 static SkColorFilter* (*gColorFilterMakers[])() = { make_null_cf, make_cf0, make_cf1, 118 make_cf2, make_cf3 }; 119 static void (*gBitmapMakers[])(SkBitmap*) = { make_bm0, make_bm1 }; 120 121 // This test will be done once for each bitmap with the results stacked vertically. 122 // For a single bitmap the resulting image will be the following: 123 // - A first line with the original bitmap, followed by the image drawn once 124 // with each of the N color filters 125 // - N lines of the bitmap drawn N times, this will cover all N*N combinations of 126 // pair of color filters in order to test the collpsing of consecutive table 127 // color filters. 128 // 129 // Here is a graphical representation of the result for 2 bitmaps and 2 filters 130 // with the number corresponding to the number of filters the bitmap goes through: 131 // 132 // --bitmap1 133 // 011 134 // 22 135 // 22 136 // --bitmap2 137 // 011 138 // 22 139 // 22 140 141 SkScalar x = 0, y = 0; 142 for (size_t bitmapMaker = 0; bitmapMaker < SK_ARRAY_COUNT(gBitmapMakers); ++bitmapMaker) { 143 SkBitmap bm; 144 gBitmapMakers[bitmapMaker](&bm); 145 146 SkScalar xOffset = SkScalar(bm.width() * 9 / 8); 147 SkScalar yOffset = SkScalar(bm.height() * 9 / 8); 148 149 // Draw the first element of the first line 150 x = 0; 151 SkPaint paint; 152 canvas->drawBitmap(bm, x, y, &paint); 153 154 // Draws the rest of the first line for this bitmap 155 // each draw being at xOffset of the previous one 156 for (unsigned i = 1; i < SK_ARRAY_COUNT(gColorFilterMakers); ++i) { 157 x += xOffset; 158 paint.setColorFilter(gColorFilterMakers[i]())->unref(); 159 canvas->drawBitmap(bm, x, y, &paint); 160 } 161 162 paint.setColorFilter(nullptr); 163 164 for (unsigned i = 0; i < SK_ARRAY_COUNT(gColorFilterMakers); ++i) { 165 SkAutoTUnref<SkColorFilter> colorFilter1(gColorFilterMakers[i]()); 166 SkAutoTUnref<SkImageFilter> imageFilter1(SkColorFilterImageFilter::Create( 167 colorFilter1, nullptr, nullptr)); 168 169 // Move down to the next line and draw it 170 // each draw being at xOffset of the previous one 171 y += yOffset; 172 x = 0; 173 for (unsigned j = 1; j < SK_ARRAY_COUNT(gColorFilterMakers); ++j) { 174 SkAutoTUnref<SkColorFilter> colorFilter2(gColorFilterMakers[j]()); 175 SkAutoTUnref<SkImageFilter> imageFilter2(SkColorFilterImageFilter::Create( 176 colorFilter2, imageFilter1, nullptr)); 177 paint.setImageFilter(imageFilter2); 178 canvas->drawBitmap(bm, x, y, &paint); 179 x += xOffset; 180 } 181 } 182 183 // Move down one line to the beginning of the block for next bitmap 184 y += yOffset; 185 } 186 } 187 188 private: 189 typedef GM INHERITED; 190 }; 191 DEF_GM( return new TableColorFilterGM; ) 192 193 ////////////////////////////////////////////////////////////////////////////// 194 195 class ComposeColorFilterGM : public skiagm::GM { 196 enum { 197 COLOR_COUNT = 3, 198 MODE_COUNT = 4, 199 }; 200 const SkColor* fColors; 201 const SkXfermode::Mode* fModes; 202 SkString fName; 203 204 public: 205 ComposeColorFilterGM(const SkColor colors[], const SkXfermode::Mode modes[], 206 const char suffix[]) 207 : fColors(colors), fModes(modes) 208 { 209 fName.printf("colorcomposefilter_%s", suffix); 210 } 211 212 protected: 213 virtual SkString onShortName() { 214 return fName; 215 } 216 217 virtual SkISize onISize() { 218 return SkISize::Make(790, 790); 219 } 220 221 virtual void onDraw(SkCanvas* canvas) { 222 SkBitmap bm; 223 make_bm1(&bm); 224 225 canvas->drawColor(sk_tool_utils::color_to_565(0xFFDDDDDD)); 226 227 const int MODES = MODE_COUNT * COLOR_COUNT; 228 SkAutoTUnref<SkColorFilter> filters[MODES]; 229 int index = 0; 230 for (int i = 0; i < MODE_COUNT; ++i) { 231 for (int j = 0; j < COLOR_COUNT; ++j) { 232 filters[index++].reset(SkColorFilter::CreateModeFilter(fColors[j], fModes[i])); 233 } 234 } 235 236 SkPaint paint; 237 paint.setShader(make_shader1(50, 50))->unref(); 238 SkRect r = SkRect::MakeWH(50, 50); 239 const SkScalar spacer = 10; 240 241 canvas->translate(spacer, spacer); 242 243 canvas->drawRect(r, paint); // orig 244 245 for (int i = 0; i < MODES; ++i) { 246 paint.setColorFilter(filters[i]); 247 248 canvas->save(); 249 canvas->translate((i + 1) * (r.width() + spacer), 0); 250 canvas->drawRect(r, paint); 251 canvas->restore(); 252 253 canvas->save(); 254 canvas->translate(0, (i + 1) * (r.width() + spacer)); 255 canvas->drawRect(r, paint); 256 canvas->restore(); 257 } 258 259 canvas->translate(r.width() + spacer, r.width() + spacer); 260 261 for (int y = 0; y < MODES; ++y) { 262 canvas->save(); 263 for (int x = 0; x < MODES; ++x) { 264 SkAutoTUnref<SkColorFilter> compose(SkColorFilter::CreateComposeFilter(filters[y], 265 filters[x])); 266 paint.setColorFilter(compose); 267 canvas->drawRect(r, paint); 268 canvas->translate(r.width() + spacer, 0); 269 } 270 canvas->restore(); 271 canvas->translate(0, r.height() + spacer); 272 } 273 } 274 275 private: 276 typedef GM INHERITED; 277 }; 278 279 const SkColor gColors0[] = { SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW }; 280 const SkXfermode::Mode gModes0[] = { 281 SkXfermode::kOverlay_Mode, 282 SkXfermode::kDarken_Mode, 283 SkXfermode::kColorBurn_Mode, 284 SkXfermode::kExclusion_Mode, 285 }; 286 DEF_GM( return new ComposeColorFilterGM(gColors0, gModes0, "wacky"); ) 287 288 const SkColor gColors1[] = { 0x80FF0000, 0x8000FF00, 0x800000FF }; 289 const SkXfermode::Mode gModes1[] = { 290 SkXfermode::kSrcOver_Mode, 291 SkXfermode::kXor_Mode, 292 SkXfermode::kDstOut_Mode, 293 SkXfermode::kSrcATop_Mode, 294 }; 295 DEF_GM( return new ComposeColorFilterGM(gColors1, gModes1, "alpha"); ) 296
