1 /* 2 * Copyright 2018 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/gm.h" 9 #include "include/core/SkBitmap.h" 10 #include "include/core/SkBlendMode.h" 11 #include "include/core/SkCanvas.h" 12 #include "include/core/SkColor.h" 13 #include "include/core/SkColorSpace.h" 14 #include "include/core/SkImageInfo.h" 15 #include "include/core/SkPaint.h" 16 17 #include <string.h> 18 19 DEF_SIMPLE_GM(unpremul, canvas, 200, 200) { 20 const SkColor color = 0xbf400000; 21 __anonfd3df41a0102(int x, int y)22 auto grade = [&](int x, int y){ 23 SkBitmap bm; 24 bm.allocPixels(SkImageInfo::Make(1,1, 25 kBGRA_8888_SkColorType, 26 kUnpremul_SkAlphaType, 27 SkColorSpace::MakeSRGB())); 28 if (!canvas->readPixels(bm, x,y)) { 29 // Picture-backed canvases, that sort of thing. Just assume they're good. 30 MarkGMGood(canvas, 140,40); 31 return; 32 } 33 34 SkColor pixel; 35 memcpy(&pixel, bm.getAddr(0,0), sizeof(pixel)); 36 37 auto close = [](int x, int y) { 38 return x-y < 2 39 && y-x < 2; 40 }; 41 42 if (close(SkColorGetR(pixel), SkColorGetR(color)) && 43 close(SkColorGetG(pixel), SkColorGetG(color)) && 44 close(SkColorGetB(pixel), SkColorGetB(color)) && 45 close(SkColorGetA(pixel), SkColorGetA(color))) { 46 47 MarkGMGood(canvas, 140,40); 48 } else { 49 MarkGMBad(canvas, 140,40); 50 } 51 }; 52 53 { 54 SkPaint paint; 55 paint.setBlendMode(SkBlendMode::kSrc); 56 paint.setColor(color); 57 58 canvas->drawRect({0,0,100,100}, paint); 59 grade(50,50); 60 } 61 62 canvas->translate(0,100); 63 64 { 65 SkPaint paint; 66 paint.setBlendMode(SkBlendMode::kSrc); 67 68 SkBitmap bm; 69 bm.allocPixels(SkImageInfo::Make(100,100, kRGBA_8888_SkColorType, kUnpremul_SkAlphaType)); 70 bm.eraseColor(color); 71 72 canvas->drawBitmap(bm, 0,0, &paint); 73 grade(50,150); 74 } 75 76 } 77