| /* |
| * 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/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/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkImageFilters.h" |
| #include "tools/ToolUtils.h" |
| #include "tools/fonts/FontToolUtils.h" |
| |
| #include <utility> |
| |
| #define WIDTH 600 |
| #define HEIGHT 700 |
| #define MARGIN 12 |
| |
| namespace skiagm { |
| |
| class XfermodeImageFilterGM : public GM { |
| public: |
| XfermodeImageFilterGM(){ |
| this->setBGColor(0xFF000000); |
| } |
| |
| protected: |
| SkString getName() const override { return SkString("xfermodeimagefilter"); } |
| |
| SkISize getISize() override { return SkISize::Make(WIDTH, HEIGHT); } |
| |
| void onOnceBeforeDraw() override { |
| fBitmap = ToolUtils::CreateStringBitmap(80, 80, 0xD000D000, 15, 65, 96, "e"); |
| |
| fCheckerboard = ToolUtils::create_checkerboard_image(80, 80, 0xFFA0A0A0, 0xFF404040, 8); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| canvas->clear(SK_ColorBLACK); |
| SkPaint paint; |
| |
| const SkBlendMode gModes[] = { |
| SkBlendMode::kClear, |
| SkBlendMode::kSrc, |
| SkBlendMode::kDst, |
| SkBlendMode::kSrcOver, |
| SkBlendMode::kDstOver, |
| SkBlendMode::kSrcIn, |
| SkBlendMode::kDstIn, |
| SkBlendMode::kSrcOut, |
| SkBlendMode::kDstOut, |
| SkBlendMode::kSrcATop, |
| SkBlendMode::kDstATop, |
| SkBlendMode::kXor, |
| |
| SkBlendMode::kPlus, |
| SkBlendMode::kModulate, |
| SkBlendMode::kScreen, |
| SkBlendMode::kOverlay, |
| SkBlendMode::kDarken, |
| SkBlendMode::kLighten, |
| SkBlendMode::kColorDodge, |
| SkBlendMode::kColorBurn, |
| SkBlendMode::kHardLight, |
| SkBlendMode::kSoftLight, |
| SkBlendMode::kDifference, |
| SkBlendMode::kExclusion, |
| SkBlendMode::kMultiply, |
| SkBlendMode::kHue, |
| SkBlendMode::kSaturation, |
| SkBlendMode::kColor, |
| SkBlendMode::kLuminosity, |
| }; |
| |
| int x = 0, y = 0; |
| sk_sp<SkImageFilter> background(SkImageFilters::Image(fCheckerboard, |
| SkFilterMode::kNearest)); |
| for (size_t i = 0; i < std::size(gModes); i++) { |
| paint.setImageFilter(SkImageFilters::Blend(gModes[i], background)); |
| DrawClippedBitmap(canvas, fBitmap, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| } |
| // Test arithmetic mode as image filter |
| paint.setImageFilter(SkImageFilters::Arithmetic(0, 1, 1, 0, true, background, nullptr)); |
| DrawClippedBitmap(canvas, fBitmap, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| // Test nullptr mode |
| paint.setImageFilter(SkImageFilters::Blend(SkBlendMode::kSrcOver, background)); |
| DrawClippedBitmap(canvas, fBitmap, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| SkRect clipRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() + 4), |
| SkIntToScalar(fBitmap.height() + 4)); |
| // Test offsets on SrcMode (uses fixed-function blend) |
| sk_sp<SkImage> bitmapImage(fBitmap.asImage()); |
| sk_sp<SkImageFilter> foreground(SkImageFilters::Image(std::move(bitmapImage), |
| SkFilterMode::kNearest)); |
| sk_sp<SkImageFilter> offsetForeground(SkImageFilters::Offset(4, -4, foreground)); |
| sk_sp<SkImageFilter> offsetBackground(SkImageFilters::Offset(4, 4, background)); |
| paint.setImageFilter(SkImageFilters::Blend( |
| SkBlendMode::kSrcOver, offsetBackground, offsetForeground)); |
| DrawClippedPaint(canvas, clipRect, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| // Test offsets on Darken (uses shader blend) |
| paint.setImageFilter(SkImageFilters::Blend( |
| SkBlendMode::kDarken, offsetBackground, offsetForeground)); |
| DrawClippedPaint(canvas, clipRect, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| // Test cropping |
| constexpr size_t nbSamples = 3; |
| const SkBlendMode sampledModes[nbSamples] = { |
| SkBlendMode::kOverlay, SkBlendMode::kSrcOver, SkBlendMode::kPlus |
| }; |
| int offsets[nbSamples][4] = {{ 10, 10, -16, -16}, |
| { 10, 10, 10, 10}, |
| {-10, -10, -6, -6}}; |
| for (size_t i = 0; i < nbSamples; ++i) { |
| SkIRect cropRect = SkIRect::MakeXYWH(offsets[i][0], |
| offsets[i][1], |
| fBitmap.width() + offsets[i][2], |
| fBitmap.height() + offsets[i][3]); |
| paint.setImageFilter(SkImageFilters::Blend(sampledModes[i], offsetBackground, |
| offsetForeground, &cropRect)); |
| DrawClippedPaint(canvas, clipRect, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| } |
| // Test small bg, large fg with Screen (uses shader blend) |
| SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 60, 60); |
| sk_sp<SkImageFilter> cropped(SkImageFilters::Offset(0, 0, foreground, &cropRect)); |
| paint.setImageFilter(SkImageFilters::Blend(SkBlendMode::kScreen, cropped, background)); |
| DrawClippedPaint(canvas, clipRect, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| // Test small fg, large bg with Screen (uses shader blend) |
| paint.setImageFilter(SkImageFilters::Blend(SkBlendMode::kScreen, background, cropped)); |
| DrawClippedPaint(canvas, clipRect, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| // Test small fg, large bg with SrcIn with a crop that forces it to full size. |
| // This tests that SkXfermodeImageFilter correctly applies the compositing mode to |
| // the region outside the foreground. |
| SkIRect cropRectFull = SkIRect::MakeXYWH(0, 0, 80, 80); |
| paint.setImageFilter(SkImageFilters::Blend(SkBlendMode::kSrcIn, background, cropped, |
| &cropRectFull)); |
| DrawClippedPaint(canvas, clipRect, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| } |
| |
| private: |
| static void DrawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint, |
| int x, int y) { |
| canvas->save(); |
| canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); |
| canvas->clipIRect(bitmap.bounds()); |
| canvas->drawImage(bitmap.asImage(), 0, 0, SkSamplingOptions(), &paint); |
| canvas->restore(); |
| } |
| |
| static void DrawClippedPaint(SkCanvas* canvas, const SkRect& rect, const SkPaint& paint, |
| int x, int y) { |
| canvas->save(); |
| canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); |
| canvas->clipRect(rect); |
| canvas->drawPaint(paint); |
| canvas->restore(); |
| } |
| |
| SkBitmap fBitmap; |
| sk_sp<SkImage> fCheckerboard; |
| |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new XfermodeImageFilterGM; ); |
| |
| } // namespace skiagm |