| /* |
| * 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" |
| #include "SkSurface.h" |
| |
| #define WIDTH 500 |
| #define HEIGHT 500 |
| |
| namespace { |
| |
| void draw_rects(SkCanvas* canvas) { |
| SkPaint rectPaint; |
| rectPaint.setColor(0xFF0000FF); |
| canvas->drawRect(SkRect::MakeXYWH(0, 0, WIDTH / 2, HEIGHT / 2), rectPaint); |
| rectPaint.setColor(0xBFFF0000); |
| canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, 0, WIDTH / 2, HEIGHT / 2), rectPaint); |
| rectPaint.setColor(0x3F00FF00); |
| canvas->drawRect(SkRect::MakeXYWH(0, HEIGHT / 2, WIDTH / 2, HEIGHT / 2), rectPaint); |
| rectPaint.setColor(0x00000000); |
| canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, HEIGHT / 2, WIDTH / 2, HEIGHT / 2), rectPaint); |
| } |
| |
| SkPaint create_filter_paint() { |
| 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); |
| |
| SkPaint paint; |
| paint.setImageFilter(SkAlphaThresholdFilter::Create(region, 0.2f, 0.7f))->unref(); |
| return paint; |
| } |
| |
| }; |
| |
| namespace skiagm { |
| |
| class ImageAlphaThresholdGM : public GM { |
| public: |
| ImageAlphaThresholdGM() { |
| this->setBGColor(0xFFFFFFFF); |
| } |
| |
| protected: |
| |
| SkString onShortName() override { |
| return SkString("imagealphathreshold"); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(WIDTH, HEIGHT); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkMatrix matrix; |
| matrix.reset(); |
| matrix.setTranslate(WIDTH * .1f, HEIGHT * .1f); |
| matrix.postScale(.8f, .8f); |
| |
| canvas->concat(matrix); |
| |
| SkPaint paint = create_filter_paint(); |
| canvas->saveLayer(nullptr, &paint); |
| draw_rects(canvas); |
| |
| canvas->restore(); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| class ImageAlphaThresholdSurfaceGM : public GM { |
| public: |
| ImageAlphaThresholdSurfaceGM() { |
| this->setBGColor(0xFFFFFFFF); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("imagealphathreshold_surface"); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(WIDTH, HEIGHT); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkImageInfo info = SkImageInfo::MakeN32(WIDTH, HEIGHT, kOpaque_SkAlphaType); |
| SkAutoTUnref<SkSurface> surface(canvas->newSurface(info)); |
| if (nullptr == surface) { |
| surface.reset(SkSurface::NewRaster(info)); |
| } |
| surface->getCanvas()->clear(SK_ColorWHITE); |
| draw_rects(surface->getCanvas()); |
| |
| SkAutoTUnref<SkImage> image(surface->newImageSnapshot()); |
| SkPaint paint = create_filter_paint(); |
| canvas->clipRect(SkRect::MakeLTRB(100, 100, WIDTH - 100, HEIGHT - 100)); |
| canvas->drawImage(image, 0, 0, &paint); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new ImageAlphaThresholdGM();) |
| DEF_GM(return new ImageAlphaThresholdSurfaceGM();) |
| |
| } |