| /* |
| * 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 "gm/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkBlendMode.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkImageFilter.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "include/effects/SkImageFilters.h" |
| #include "tools/ToolUtils.h" |
| |
| #include <utility> |
| |
| 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. |
| |
| static sk_sp<SkImage> make_gradient_circle(int width, int height) { |
| SkScalar x = SkIntToScalar(width / 2); |
| SkScalar y = SkIntToScalar(height / 2); |
| SkScalar radius = std::min(x, y) * 0.8f; |
| |
| auto surface(SkSurface::MakeRasterN32Premul(width, height)); |
| SkCanvas* canvas = surface->getCanvas(); |
| |
| canvas->clear(0x00000000); |
| SkColor colors[2]; |
| colors[0] = SK_ColorWHITE; |
| colors[1] = SK_ColorBLACK; |
| SkPaint paint; |
| paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr, 2, |
| SkTileMode::kClamp)); |
| canvas->drawCircle(x, y, radius, paint); |
| |
| return surface->makeImageSnapshot(); |
| } |
| |
| 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 onOnceBeforeDraw() override { |
| fCheckerboard = SkImage::MakeFromBitmap( |
| ToolUtils::create_checkerboard_bitmap(64, 64, 0xFFA0A0A0, 0xFF404040, 8)); |
| fGradientCircle = make_gradient_circle(64, 64); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| sk_sp<SkImageFilter> gradient(SkImageFilters::Image(fGradientCircle)); |
| sk_sp<SkImageFilter> checkerboard(SkImageFilters::Image(fCheckerboard)); |
| sk_sp<SkImageFilter> filters[] = { |
| SkImageFilters::Blur(12, 0, nullptr), |
| SkImageFilters::DropShadow(0, 15, 8, 0, SK_ColorGREEN, nullptr), |
| SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kR, 12, |
| std::move(gradient), checkerboard), |
| SkImageFilters::Dilate(2, 2, checkerboard), |
| SkImageFilters::Erode(2, 2, checkerboard), |
| }; |
| |
| 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); |
| } |
| } |
| |
| private: |
| sk_sp<SkImage> fCheckerboard; |
| sk_sp<SkImage> fGradientCircle; |
| typedef GM INHERITED; |
| }; |
| DEF_GM( return new ImageFiltersTransformedGM; ) |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SIMPLE_GM(rotate_imagefilter, canvas, 500, 500) { |
| SkPaint paint; |
| |
| const SkRect r = SkRect::MakeXYWH(50, 50, 100, 100); |
| |
| sk_sp<SkImageFilter> filters[] = { |
| nullptr, |
| SkImageFilters::Blur(6, 0, nullptr), |
| SkImageFilters::Xfermode(SkBlendMode::kSrcOver, nullptr), |
| }; |
| |
| for (auto& filter : filters) { |
| paint.setAntiAlias(false); |
| paint.setImageFilter(filter); |
| |
| canvas->save(); |
| |
| canvas->drawRect(r, paint); |
| |
| canvas->translate(150, 0); |
| canvas->save(); |
| canvas->rotate(30, 100, 100); |
| canvas->drawRect(r, paint); |
| canvas->restore(); |
| |
| paint.setAntiAlias(true); |
| canvas->translate(150, 0); |
| canvas->save(); |
| canvas->rotate(30, 100, 100); |
| canvas->drawRect(r, paint); |
| canvas->restore(); |
| |
| canvas->restore(); |
| canvas->translate(0, 150); |
| } |
| } |