| /* |
| * 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 "SkOffsetImageFilter.h" |
| #include "SkSurface.h" |
| |
| #define WIDTH 500 |
| #define HEIGHT 500 |
| |
| static void draw_rects(SkCanvas* canvas) { |
| SkPaint rectPaint; |
| rectPaint.setColor(SK_ColorBLUE); |
| 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(SK_ColorTRANSPARENT); |
| canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, HEIGHT / 2, WIDTH / 2, HEIGHT / 2), rectPaint); |
| } |
| |
| static SkPaint create_filter_paint(SkImageFilter::CropRect* cropRect = nullptr) { |
| 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; |
| sk_sp<SkImageFilter> offset(SkOffsetImageFilter::Make(25, 25, nullptr)); |
| paint.setImageFilter(SkAlphaThresholdFilter::Make(region, 0.2f, 0.7f, std::move(offset), cropRect)); |
| return paint; |
| } |
| |
| class ImageAlphaThresholdGM : public skiagm::GM { |
| public: |
| ImageAlphaThresholdGM(bool useCropRect) : fUseCropRect(useCropRect) { |
| this->setBGColor(SK_ColorWHITE); |
| } |
| |
| protected: |
| |
| SkString onShortName() override { |
| if (fUseCropRect) { |
| return SkString("imagealphathreshold_crop"); |
| } |
| |
| 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); |
| |
| SkRect r = SkRect::MakeLTRB(100, 100, WIDTH - 100, HEIGHT - 100); |
| SkImageFilter::CropRect cropRect(r); |
| |
| SkPaint paint = create_filter_paint(fUseCropRect ? &cropRect : nullptr); |
| canvas->saveLayer(nullptr, &paint); |
| draw_rects(canvas); |
| |
| canvas->restore(); |
| } |
| |
| private: |
| bool fUseCropRect; |
| |
| typedef GM INHERITED; |
| }; |
| |
| // Create a 'width' x 'height' SkSurface that matches the colorType of 'canvas' as |
| // best we can |
| static sk_sp<SkSurface> make_color_matching_surface(SkCanvas* canvas, int width, int height, |
| SkAlphaType alphaType) { |
| |
| SkColorType ct = canvas->imageInfo().colorType(); |
| sk_sp<SkColorSpace> cs(sk_ref_sp(canvas->imageInfo().colorSpace())); |
| |
| if (kUnknown_SkColorType == ct) { |
| // For backends that aren't yet color-space aware we just fallback to N32. |
| ct = kN32_SkColorType; |
| cs = nullptr; |
| } |
| |
| SkImageInfo info = SkImageInfo::Make(width, height, ct, alphaType, std::move(cs)); |
| |
| sk_sp<SkSurface> result = canvas->makeSurface(info); |
| if (!result) { |
| result = SkSurface::MakeRaster(info); |
| } |
| |
| return result; |
| } |
| |
| class ImageAlphaThresholdSurfaceGM : public skiagm::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 { |
| SkMatrix matrix; |
| matrix.reset(); |
| matrix.setTranslate(WIDTH * .1f, HEIGHT * .1f); |
| matrix.postScale(.8f, .8f); |
| |
| canvas->concat(matrix); |
| |
| sk_sp<SkSurface> surface(make_color_matching_surface(canvas, WIDTH, HEIGHT, |
| kPremul_SkAlphaType)); |
| if (!surface) { |
| return; |
| } |
| |
| surface->getCanvas()->clear(SK_ColorTRANSPARENT); |
| draw_rects(surface->getCanvas()); |
| |
| SkPaint paint = create_filter_paint(); |
| canvas->clipRect(SkRect::MakeLTRB(100, 100, WIDTH - 100, HEIGHT - 100)); |
| canvas->drawImage(surface->makeImageSnapshot().get(), 0, 0, &paint); |
| } |
| |
| private: |
| typedef skiagm::GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new ImageAlphaThresholdGM(true);) |
| DEF_GM(return new ImageAlphaThresholdGM(false);) |
| DEF_GM(return new ImageAlphaThresholdSurfaceGM();) |