| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkAlphaThresholdFilter.h" |
| #include "SkRandom.h" |
| |
| #define WIDTH 500 |
| #define HEIGHT 500 |
| |
| namespace skiagm { |
| |
| class ImageAlphaThresholdGM : public GM { |
| public: |
| ImageAlphaThresholdGM() { |
| this->setBGColor(0xFFFFFFFF); |
| } |
| |
| protected: |
| virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| return this->INHERITED::onGetFlags() | GM::kSkipTiled_Flag; |
| } |
| |
| virtual SkString onShortName() SK_OVERRIDE { |
| return SkString("imagealphathreshold"); |
| } |
| |
| virtual SkISize onISize() SK_OVERRIDE { |
| return make_isize(WIDTH, HEIGHT); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| SkIRect rects[2]; |
| rects[0] = SkIRect::MakeXYWH(0, 150, WIDTH, HEIGHT - 300); |
| rects[1] = SkIRect::MakeXYWH(150, 0, WIDTH - 300, HEIGHT); |
| SkRegion region; |
| region.setRects(rects, 2); |
| |
| SkMatrix matrix; |
| matrix.reset(); |
| matrix.setTranslate(WIDTH * .1f, HEIGHT * .1f); |
| matrix.postScale(.8, .8); |
| |
| canvas->concat(matrix); |
| |
| SkPaint paint; |
| paint.setImageFilter( |
| SkAlphaThresholdFilter::Create(region, 0.2f, 0.7f))->unref(); |
| canvas->saveLayer(NULL, &paint); |
| paint.setAntiAlias(true); |
| |
| SkPaint rect_paint; |
| rect_paint.setColor(0xFF0000FF); |
| canvas->drawRect(SkRect::MakeXYWH(0, 0, WIDTH / 2, HEIGHT / 2), |
| rect_paint); |
| rect_paint.setColor(0xBFFF0000); |
| canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, 0, WIDTH / 2, HEIGHT / 2), |
| rect_paint); |
| rect_paint.setColor(0x3F00FF00); |
| canvas->drawRect(SkRect::MakeXYWH(0, HEIGHT / 2, WIDTH / 2, HEIGHT / 2), |
| rect_paint); |
| rect_paint.setColor(0x00000000); |
| canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, HEIGHT / 2, WIDTH / 2, HEIGHT / 2), |
| rect_paint); |
| |
| canvas->restore(); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new ImageAlphaThresholdGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |