| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "sk_tool_utils.h" |
| #include "SkBitmapSource.h" |
| #include "SkBlurImageFilter.h" |
| #include "SkColor.h" |
| #include "SkDisplacementMapEffect.h" |
| #include "SkDropShadowImageFilter.h" |
| #include "SkGradientShader.h" |
| #include "SkMorphologyImageFilter.h" |
| #include "SkScalar.h" |
| #include "gm.h" |
| |
| namespace skiagm { |
| |
| // This GM draws image filters with a CTM containing shearing / rotation. |
| // It checks that the scale portion of the CTM is correctly extracted |
| // and applied to the image inputs separately from the non-scale portion. |
| |
| class ImageFiltersTransformedGM : public GM { |
| public: |
| ImageFiltersTransformedGM() { |
| this->setBGColor(SK_ColorBLACK); |
| } |
| |
| protected: |
| |
| SkString onShortName() override { return SkString("imagefilterstransformed"); } |
| |
| SkISize onISize() override { return SkISize::Make(420, 240); } |
| |
| void makeGradientCircle(int width, int height) { |
| SkScalar x = SkIntToScalar(width / 2); |
| SkScalar y = SkIntToScalar(height / 2); |
| SkScalar radius = SkMinScalar(x, y) * 0.8f; |
| fGradientCircle.allocN32Pixels(width, height); |
| SkCanvas canvas(fGradientCircle); |
| canvas.clear(0x00000000); |
| SkColor colors[2]; |
| colors[0] = SK_ColorWHITE; |
| colors[1] = SK_ColorBLACK; |
| SkAutoTUnref<SkShader> shader( |
| SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, NULL, 2, |
| SkShader::kClamp_TileMode) |
| ); |
| SkPaint paint; |
| paint.setShader(shader); |
| canvas.drawCircle(x, y, radius, paint); |
| } |
| |
| void onOnceBeforeDraw() override { |
| fCheckerboard.allocN32Pixels(64, 64); |
| SkCanvas checkerboardCanvas(fCheckerboard); |
| sk_tool_utils::draw_checkerboard(&checkerboardCanvas, 0xFFA0A0A0, 0xFF404040, 8); |
| |
| this->makeGradientCircle(64, 64); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkAutoTUnref<SkImageFilter> gradient(SkBitmapSource::Create(fGradientCircle)); |
| SkAutoTUnref<SkImageFilter> checkerboard(SkBitmapSource::Create(fCheckerboard)); |
| SkImageFilter* filters[] = { |
| SkBlurImageFilter::Create(12, 0), |
| SkDropShadowImageFilter::Create(0, 15, 8, 0, SK_ColorGREEN, |
| SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode), |
| SkDisplacementMapEffect::Create(SkDisplacementMapEffect::kR_ChannelSelectorType, |
| SkDisplacementMapEffect::kR_ChannelSelectorType, |
| 12, |
| gradient.get(), |
| checkerboard.get()), |
| SkDilateImageFilter::Create(2, 2, checkerboard.get()), |
| SkErodeImageFilter::Create(2, 2, checkerboard.get()), |
| }; |
| |
| const SkScalar margin = SkIntToScalar(20); |
| const SkScalar size = SkIntToScalar(60); |
| |
| for (size_t j = 0; j < 3; j++) { |
| canvas->save(); |
| canvas->translate(margin, 0); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { |
| SkPaint paint; |
| paint.setColor(SK_ColorWHITE); |
| paint.setImageFilter(filters[i]); |
| paint.setAntiAlias(true); |
| canvas->save(); |
| canvas->translate(size * SK_ScalarHalf, size * SK_ScalarHalf); |
| canvas->scale(SkDoubleToScalar(0.8), SkDoubleToScalar(0.8)); |
| if (j == 1) { |
| canvas->rotate(SkIntToScalar(45)); |
| } else if (j == 2) { |
| canvas->skew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2)); |
| } |
| canvas->translate(-size * SK_ScalarHalf, -size * SK_ScalarHalf); |
| canvas->drawOval(SkRect::MakeXYWH(0, size * SkDoubleToScalar(0.1), |
| size, size * SkDoubleToScalar(0.6)), paint); |
| canvas->restore(); |
| canvas->translate(size + margin, 0); |
| } |
| canvas->restore(); |
| canvas->translate(0, size + margin); |
| } |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { |
| SkSafeUnref(filters[i]); |
| } |
| } |
| |
| private: |
| SkBitmap fCheckerboard; |
| SkBitmap fGradientCircle; |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new ImageFiltersTransformedGM; ) |
| |
| } |