Robert Phillips | 8ced688 | 2016-12-16 11:47:46 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 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 "SkImageShader.h" |
| 10 | |
| 11 | static const sk_sp<SkImage> make_image(int firstBlackRow, int lastBlackRow) { |
| 12 | static const int kWidth = 25; |
| 13 | static const int kHeight = 27; |
| 14 | |
| 15 | SkBitmap bm; |
| 16 | bm.allocN32Pixels(kWidth, kHeight); |
| 17 | bm.eraseColor(SK_ColorWHITE); |
| 18 | for (int y = firstBlackRow; y < lastBlackRow; ++y) { |
| 19 | for (int x = 0; x < kWidth; ++x) { |
| 20 | *bm.getAddr32(x, y) = SkPackARGB32(0xFF, 0x0, 0x0, 0x0); |
| 21 | } |
| 22 | } |
| 23 | |
| 24 | bm.setAlphaType(SkAlphaType::kOpaque_SkAlphaType); |
| 25 | bm.setImmutable(); |
| 26 | |
| 27 | return SkImage::MakeFromBitmap(bm); |
| 28 | } |
| 29 | |
| 30 | // GM to reproduce crbug.com/673261. |
| 31 | class FilterBugGM : public skiagm::GM { |
| 32 | public: |
| 33 | FilterBugGM() { this->setBGColor(SK_ColorRED); } |
| 34 | |
| 35 | protected: |
| 36 | SkString onShortName() override { return SkString("filterbug"); } |
| 37 | |
| 38 | SkISize onISize() override { return SkISize::Make(150, 150); } |
| 39 | |
| 40 | void onOnceBeforeDraw() override { |
| 41 | // The top texture has 5 black rows on top and then 22 white rows on the bottom |
| 42 | fTop = make_image(0, 5); |
| 43 | // The bottom texture has 5 black rows on the bottom and then 22 white rows on the top |
| 44 | fBot = make_image(22, 27); |
| 45 | } |
| 46 | |
| 47 | void onDraw(SkCanvas* canvas) override { |
| 48 | static const SkFilterQuality kFilterQuality = SkFilterQuality::kHigh_SkFilterQuality; |
| 49 | static const bool kDoAA = true; |
| 50 | |
| 51 | { |
| 52 | SkRect r1 = SkRect::MakeXYWH(50.0f, 0.0f, 50.0f, 50.0f); |
| 53 | SkPaint p1; |
| 54 | p1.setAntiAlias(kDoAA); |
| 55 | p1.setFilterQuality(kFilterQuality); |
| 56 | SkMatrix localMat; |
| 57 | localMat.setScaleTranslate(2.0f, 2.0f, 50.0f, 0.0f); |
| 58 | p1.setShader(SkImageShader::Make(fTop, |
| 59 | SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, |
| 60 | &localMat)); |
| 61 | |
| 62 | canvas->drawRect(r1, p1); |
| 63 | } |
| 64 | |
| 65 | { |
| 66 | SkRect r2 = SkRect::MakeXYWH(50.0f, 50.0f, 50.0f, 36.0f); |
| 67 | |
| 68 | SkPaint p2; |
| 69 | p2.setColor(SK_ColorWHITE); |
| 70 | p2.setAntiAlias(kDoAA); |
| 71 | p2.setFilterQuality(kFilterQuality); |
| 72 | |
| 73 | canvas->drawRect(r2, p2); |
| 74 | } |
| 75 | |
| 76 | { |
| 77 | SkRect r3 = SkRect::MakeXYWH(50.0f, 86.0f, 50.0f, 50.0f); |
| 78 | |
| 79 | SkPaint p3; |
| 80 | p3.setAntiAlias(kDoAA); |
| 81 | p3.setFilterQuality(kFilterQuality); |
| 82 | SkMatrix localMat; |
| 83 | localMat.setScaleTranslate(2.0f, 2.0f, 50.0f, 86.0f); |
| 84 | p3.setShader(SkImageShader::Make(fBot, |
| 85 | SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, |
| 86 | &localMat)); |
| 87 | |
| 88 | canvas->drawRect(r3, p3); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | private: |
| 93 | sk_sp<SkImage> fTop; |
| 94 | sk_sp<SkImage> fBot; |
| 95 | |
| 96 | typedef skiagm::GM INHERITED; |
| 97 | }; |
| 98 | |
| 99 | ////////////////////////////////////////////////////////////////////////////// |
| 100 | |
| 101 | DEF_GM(return new FilterBugGM;) |