/* * Copyright 2018 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm/gm.h" #include "include/core/SkBitmap.h" #include "include/core/SkBlendMode.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkColorSpace.h" #include "include/core/SkImageInfo.h" #include "include/core/SkPaint.h" #include <string.h> DEF_SIMPLE_GM(unpremul, canvas, 200, 200) { const SkColor color = 0xbf400000; auto grade = [&](int x, int y){ SkBitmap bm; bm.allocPixels(SkImageInfo::Make(1,1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType, SkColorSpace::MakeSRGB())); if (!canvas->readPixels(bm, x,y)) { // Picture-backed canvases, that sort of thing. Just assume they're good. MarkGMGood(canvas, 140,40); return; } SkColor pixel; memcpy(&pixel, bm.getAddr(0,0), sizeof(pixel)); auto close = [](int x, int y) { return x-y < 2 && y-x < 2; }; if (close(SkColorGetR(pixel), SkColorGetR(color)) && close(SkColorGetG(pixel), SkColorGetG(color)) && close(SkColorGetB(pixel), SkColorGetB(color)) && close(SkColorGetA(pixel), SkColorGetA(color))) { MarkGMGood(canvas, 140,40); } else { MarkGMBad(canvas, 140,40); } }; { SkPaint paint; paint.setBlendMode(SkBlendMode::kSrc); paint.setColor(color); canvas->drawRect({0,0,100,100}, paint); grade(50,50); } canvas->translate(0,100); { SkPaint paint; paint.setBlendMode(SkBlendMode::kSrc); SkBitmap bm; bm.allocPixels(SkImageInfo::Make(100,100, kRGBA_8888_SkColorType, kUnpremul_SkAlphaType)); bm.eraseColor(color); canvas->drawBitmap(bm, 0,0, &paint); grade(50,150); } }