Matt Sarett | a9fd106 | 2016-10-28 13:25:40 -0400 | [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 "SkBitmap.h" |
| 10 | #include "SkColorFilter.h" |
| 11 | |
| 12 | class ColorFilterAlpha8 : public skiagm::GM { |
| 13 | public: |
| 14 | ColorFilterAlpha8() {} |
| 15 | |
| 16 | protected: |
| 17 | SkString onShortName() override { |
| 18 | return SkString("colorfilteralpha8"); |
| 19 | } |
| 20 | |
| 21 | SkISize onISize() override { |
| 22 | return SkISize::Make(400, 400); |
| 23 | } |
| 24 | |
| 25 | void onDraw(SkCanvas* canvas) override { |
| 26 | canvas->clear(SK_ColorRED); |
| 27 | |
| 28 | SkBitmap bitmap; |
| 29 | SkImageInfo info = SkImageInfo::MakeA8(200, 200); |
| 30 | bitmap.allocPixels(info); |
| 31 | bitmap.eraseColor(0x88FFFFFF); |
| 32 | |
| 33 | SkPaint paint; |
| 34 | float opaqueGrayMatrix[20] = { |
| 35 | 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, |
| 36 | 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, |
| 37 | 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, |
| 38 | 0.0f, 0.0f, 0.0f, 0.0f, 255.0f |
| 39 | }; |
| 40 | paint.setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(opaqueGrayMatrix)); |
| 41 | |
| 42 | canvas->drawBitmap(bitmap, 100.0f, 100.0f, &paint); |
| 43 | } |
| 44 | |
| 45 | private: |
| 46 | typedef skiagm::GM INHERITED; |
| 47 | }; |
| 48 | DEF_GM( return new ColorFilterAlpha8; ) |