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| 1 /* |
| 2 * Copyright 2013 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 "SkAlphaThresholdFilter.h" |
| 10 #include "SkRandom.h" |
| 11 |
| 12 #define WIDTH 500 |
| 13 #define HEIGHT 500 |
| 14 |
| 15 namespace skiagm { |
| 16 |
| 17 class ImageAlphaThresholdGM : public GM { |
| 18 public: |
| 19 ImageAlphaThresholdGM() { |
| 20 this->setBGColor(0xFFFFFFFF); |
| 21 } |
| 22 |
| 23 protected: |
| 24 virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| 25 return this->INHERITED::onGetFlags() | GM::kSkipTiled_Flag; |
| 26 } |
| 27 |
| 28 virtual SkString onShortName() SK_OVERRIDE { |
| 29 return SkString("imagealphathreshold"); |
| 30 } |
| 31 |
| 32 virtual SkISize onISize() SK_OVERRIDE { |
| 33 return make_isize(WIDTH, HEIGHT); |
| 34 } |
| 35 |
| 36 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 37 SkIRect rects[2]; |
| 38 rects[0] = SkIRect::MakeXYWH(0, 150, WIDTH, HEIGHT - 300); |
| 39 rects[1] = SkIRect::MakeXYWH(150, 0, WIDTH - 300, HEIGHT); |
| 40 SkRegion region; |
| 41 region.setRects(rects, 2); |
| 42 |
| 43 SkMatrix matrix; |
| 44 matrix.reset(); |
| 45 matrix.setTranslate(WIDTH * .1f, HEIGHT * .1f); |
| 46 matrix.postScale(.8, .8); |
| 47 |
| 48 canvas->concat(matrix); |
| 49 |
| 50 SkPaint paint; |
| 51 paint.setImageFilter( |
| 52 SkAlphaThresholdFilter::Create(region, 0.2f, 0.7f))->unref(); |
| 53 canvas->saveLayer(NULL, &paint); |
| 54 paint.setAntiAlias(true); |
| 55 |
| 56 SkPaint rect_paint; |
| 57 rect_paint.setColor(0xFF0000FF); |
| 58 canvas->drawRect(SkRect::MakeXYWH(0, 0, WIDTH / 2, HEIGHT / 2), |
| 59 rect_paint); |
| 60 rect_paint.setColor(0xBFFF0000); |
| 61 canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, 0, WIDTH / 2, HEIGHT / 2), |
| 62 rect_paint); |
| 63 rect_paint.setColor(0x3F00FF00); |
| 64 canvas->drawRect(SkRect::MakeXYWH(0, HEIGHT / 2, WIDTH / 2, HEIGHT / 2), |
| 65 rect_paint); |
| 66 rect_paint.setColor(0x00000000); |
| 67 canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, HEIGHT / 2, WIDTH / 2, HEIG
HT / 2), |
| 68 rect_paint); |
| 69 |
| 70 canvas->restore(); |
| 71 } |
| 72 |
| 73 private: |
| 74 typedef GM INHERITED; |
| 75 }; |
| 76 |
| 77 ////////////////////////////////////////////////////////////////////////////// |
| 78 |
| 79 static GM* MyFactory(void*) { return new ImageAlphaThresholdGM; } |
| 80 static GMRegistry reg(MyFactory); |
| 81 |
| 82 } |
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