Mike Klein | c9eace8 | 2018-10-31 10:49:38 -0400 | [diff] [blame] | 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 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 8 | #include "gm/gm.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 9 | #include "include/core/SkBitmap.h" |
| 10 | #include "include/core/SkBlendMode.h" |
| 11 | #include "include/core/SkCanvas.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 12 | #include "include/core/SkColor.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 13 | #include "include/core/SkColorSpace.h" |
Mike Reed | 607a382 | 2021-01-24 19:49:21 -0500 | [diff] [blame] | 14 | #include "include/core/SkImage.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 15 | #include "include/core/SkImageInfo.h" |
| 16 | #include "include/core/SkPaint.h" |
| 17 | |
| 18 | #include <string.h> |
Mike Klein | c9eace8 | 2018-10-31 10:49:38 -0400 | [diff] [blame] | 19 | |
| 20 | DEF_SIMPLE_GM(unpremul, canvas, 200, 200) { |
| 21 | const SkColor color = 0xbf400000; |
| 22 | |
| 23 | auto grade = [&](int x, int y){ |
| 24 | SkBitmap bm; |
| 25 | bm.allocPixels(SkImageInfo::Make(1,1, |
| 26 | kBGRA_8888_SkColorType, |
| 27 | kUnpremul_SkAlphaType, |
| 28 | SkColorSpace::MakeSRGB())); |
| 29 | if (!canvas->readPixels(bm, x,y)) { |
| 30 | // Picture-backed canvases, that sort of thing. Just assume they're good. |
| 31 | MarkGMGood(canvas, 140,40); |
| 32 | return; |
| 33 | } |
| 34 | |
| 35 | SkColor pixel; |
| 36 | memcpy(&pixel, bm.getAddr(0,0), sizeof(pixel)); |
| 37 | |
| 38 | auto close = [](int x, int y) { |
| 39 | return x-y < 2 |
| 40 | && y-x < 2; |
| 41 | }; |
| 42 | |
| 43 | if (close(SkColorGetR(pixel), SkColorGetR(color)) && |
| 44 | close(SkColorGetG(pixel), SkColorGetG(color)) && |
| 45 | close(SkColorGetB(pixel), SkColorGetB(color)) && |
| 46 | close(SkColorGetA(pixel), SkColorGetA(color))) { |
| 47 | |
| 48 | MarkGMGood(canvas, 140,40); |
| 49 | } else { |
| 50 | MarkGMBad(canvas, 140,40); |
| 51 | } |
| 52 | }; |
| 53 | |
| 54 | { |
| 55 | SkPaint paint; |
| 56 | paint.setBlendMode(SkBlendMode::kSrc); |
| 57 | paint.setColor(color); |
| 58 | |
| 59 | canvas->drawRect({0,0,100,100}, paint); |
| 60 | grade(50,50); |
| 61 | } |
| 62 | |
| 63 | canvas->translate(0,100); |
| 64 | |
| 65 | { |
| 66 | SkPaint paint; |
| 67 | paint.setBlendMode(SkBlendMode::kSrc); |
| 68 | |
| 69 | SkBitmap bm; |
| 70 | bm.allocPixels(SkImageInfo::Make(100,100, kRGBA_8888_SkColorType, kUnpremul_SkAlphaType)); |
| 71 | bm.eraseColor(color); |
| 72 | |
Mike Reed | 607a382 | 2021-01-24 19:49:21 -0500 | [diff] [blame] | 73 | canvas->drawImage(bm.asImage(), 0,0, SkSamplingOptions(), &paint); |
Mike Klein | c9eace8 | 2018-10-31 10:49:38 -0400 | [diff] [blame] | 74 | grade(50,150); |
| 75 | } |
| 76 | |
| 77 | } |