| /* |
| * 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 "sk_tool_utils.h" |
| #include "SkArithmeticMode.h" |
| #include "SkImage.h" |
| #include "SkImageSource.h" |
| #include "SkOffsetImageFilter.h" |
| #include "SkXfermodeImageFilter.h" |
| |
| #define WIDTH 600 |
| #define HEIGHT 700 |
| #define MARGIN 12 |
| |
| namespace skiagm { |
| |
| class XfermodeImageFilterGM : public GM { |
| public: |
| XfermodeImageFilterGM(){ |
| this->setBGColor(0xFF000000); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("xfermodeimagefilter"); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(WIDTH, HEIGHT); |
| } |
| |
| void onOnceBeforeDraw() override { |
| fBitmap = sk_tool_utils::create_string_bitmap(80, 80, 0xD000D000, 15, 65, 96, "e"); |
| |
| fCheckerboard = SkImage::MakeFromBitmap( |
| sk_tool_utils::create_checkerboard_bitmap(80, 80, |
| sk_tool_utils::color_to_565(0xFFA0A0A0), |
| sk_tool_utils::color_to_565(0xFF404040), |
| 8)); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| canvas->clear(SK_ColorBLACK); |
| SkPaint paint; |
| |
| const struct { |
| SkXfermode::Mode fMode; |
| const char* fLabel; |
| } gModes[] = { |
| { SkXfermode::kClear_Mode, "Clear" }, |
| { SkXfermode::kSrc_Mode, "Src" }, |
| { SkXfermode::kDst_Mode, "Dst" }, |
| { SkXfermode::kSrcOver_Mode, "SrcOver" }, |
| { SkXfermode::kDstOver_Mode, "DstOver" }, |
| { SkXfermode::kSrcIn_Mode, "SrcIn" }, |
| { SkXfermode::kDstIn_Mode, "DstIn" }, |
| { SkXfermode::kSrcOut_Mode, "SrcOut" }, |
| { SkXfermode::kDstOut_Mode, "DstOut" }, |
| { SkXfermode::kSrcATop_Mode, "SrcATop" }, |
| { SkXfermode::kDstATop_Mode, "DstATop" }, |
| { SkXfermode::kXor_Mode, "Xor" }, |
| |
| { SkXfermode::kPlus_Mode, "Plus" }, |
| { SkXfermode::kModulate_Mode, "Modulate" }, |
| { SkXfermode::kScreen_Mode, "Screen" }, |
| { SkXfermode::kOverlay_Mode, "Overlay" }, |
| { SkXfermode::kDarken_Mode, "Darken" }, |
| { SkXfermode::kLighten_Mode, "Lighten" }, |
| { SkXfermode::kColorDodge_Mode, "ColorDodge" }, |
| { SkXfermode::kColorBurn_Mode, "ColorBurn" }, |
| { SkXfermode::kHardLight_Mode, "HardLight" }, |
| { SkXfermode::kSoftLight_Mode, "SoftLight" }, |
| { SkXfermode::kDifference_Mode, "Difference" }, |
| { SkXfermode::kExclusion_Mode, "Exclusion" }, |
| { SkXfermode::kMultiply_Mode, "Multiply" }, |
| { SkXfermode::kHue_Mode, "Hue" }, |
| { SkXfermode::kSaturation_Mode, "Saturation" }, |
| { SkXfermode::kColor_Mode, "Color" }, |
| { SkXfermode::kLuminosity_Mode, "Luminosity" }, |
| }; |
| |
| int x = 0, y = 0; |
| SkAutoTUnref<SkImageFilter> background(SkImageSource::Create(fCheckerboard.get())); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) { |
| paint.setImageFilter(SkXfermodeImageFilter::Make(SkXfermode::Make(gModes[i].fMode), |
| 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(SkXfermodeImageFilter::Make( |
| SkArithmeticMode::Make(0, SK_Scalar1, SK_Scalar1, 0), background)); |
| 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(SkXfermodeImageFilter::Make(nullptr, 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(SkImage::MakeFromBitmap(fBitmap)); |
| SkAutoTUnref<SkImageFilter> foreground(SkImageSource::Create(bitmapImage.get())); |
| SkAutoTUnref<SkImageFilter> offsetForeground(SkOffsetImageFilter::Create( |
| SkIntToScalar(4), SkIntToScalar(-4), foreground)); |
| SkAutoTUnref<SkImageFilter> offsetBackground(SkOffsetImageFilter::Create( |
| SkIntToScalar(4), SkIntToScalar(4), background)); |
| paint.setImageFilter(SkXfermodeImageFilter::Make( |
| SkXfermode::Make(SkXfermode::kSrcOver_Mode), offsetBackground, |
| offsetForeground, nullptr)); |
| 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(SkXfermodeImageFilter::Make(SkXfermode::Make(SkXfermode::kDarken_Mode), |
| offsetBackground, offsetForeground, nullptr)); |
| DrawClippedPaint(canvas, clipRect, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| // Test cropping |
| static const size_t nbSamples = 3; |
| SkXfermode::Mode sampledModes[nbSamples] = {SkXfermode::kOverlay_Mode, |
| SkXfermode::kSrcOver_Mode, |
| SkXfermode::kPlus_Mode}; |
| 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]); |
| SkImageFilter::CropRect rect(SkRect::Make(cropRect)); |
| paint.setImageFilter(SkXfermodeImageFilter::Make( |
| SkXfermode::Make(sampledModes[i]), offsetBackground, offsetForeground, &rect)); |
| 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) |
| auto mode = SkXfermode::Make(SkXfermode::kScreen_Mode); |
| SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(10, 10, 60, 60)); |
| SkAutoTUnref<SkImageFilter> cropped( |
| SkOffsetImageFilter::Create(0, 0, foreground, &cropRect)); |
| paint.setImageFilter(SkXfermodeImageFilter::Make(mode, cropped, background, nullptr)); |
| 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(SkXfermodeImageFilter::Make(mode, background, cropped, nullptr)); |
| 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->clipRect(SkRect::MakeWH( |
| SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height()))); |
| canvas->drawBitmap(bitmap, 0, 0, &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; |
| |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new XfermodeImageFilterGM; ); |
| |
| } |