| /* |
| * 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 "SkArithmeticMode.h" |
| #include "SkOffsetImageFilter.h" |
| #include "SkXfermodeImageFilter.h" |
| #include "SkBitmapSource.h" |
| |
| #define WIDTH 600 |
| #define HEIGHT 600 |
| #define MARGIN 12 |
| |
| namespace skiagm { |
| |
| class XfermodeImageFilterGM : public GM { |
| public: |
| XfermodeImageFilterGM(){ |
| this->setBGColor(0xFF000000); |
| } |
| |
| protected: |
| virtual SkString onShortName() SK_OVERRIDE { |
| return SkString("xfermodeimagefilter"); |
| } |
| |
| void make_bitmap() { |
| fBitmap.allocN32Pixels(80, 80); |
| SkCanvas canvas(fBitmap); |
| canvas.clear(0x00000000); |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| sk_tool_utils::set_portable_typeface(&paint); |
| paint.setColor(0xD000D000); |
| paint.setTextSize(SkIntToScalar(96)); |
| const char* str = "e"; |
| canvas.drawText(str, strlen(str), SkIntToScalar(15), SkIntToScalar(65), paint); |
| } |
| |
| void make_checkerboard() { |
| fCheckerboard.allocN32Pixels(80, 80); |
| SkCanvas canvas(fCheckerboard); |
| canvas.clear(0x00000000); |
| SkPaint darkPaint; |
| darkPaint.setColor(0xFF404040); |
| SkPaint lightPaint; |
| lightPaint.setColor(0xFFA0A0A0); |
| for (int y = 0; y < 80; y += 16) { |
| for (int x = 0; x < 80; x += 16) { |
| canvas.save(); |
| canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); |
| canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint); |
| canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint); |
| canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint); |
| canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint); |
| canvas.restore(); |
| } |
| } |
| } |
| |
| virtual SkISize onISize() SK_OVERRIDE { |
| return SkISize::Make(WIDTH, HEIGHT); |
| } |
| |
| 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(); |
| } |
| |
| virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| make_bitmap(); |
| make_checkerboard(); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| canvas->clear(0x00000000); |
| 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(SkBitmapSource::Create(fCheckerboard)); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) { |
| SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(gModes[i].fMode)); |
| SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background)); |
| paint.setImageFilter(filter); |
| 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 |
| SkAutoTUnref<SkXfermode> mode(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0)); |
| SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background)); |
| paint.setImageFilter(filter); |
| drawClippedBitmap(canvas, fBitmap, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| // Test NULL mode |
| filter.reset(SkXfermodeImageFilter::Create(NULL, background)); |
| paint.setImageFilter(filter); |
| 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) |
| SkAutoTUnref<SkImageFilter> foreground(SkBitmapSource::Create(fBitmap)); |
| SkAutoTUnref<SkImageFilter> offsetForeground(SkOffsetImageFilter::Create( |
| SkIntToScalar(4), SkIntToScalar(-4), foreground)); |
| SkAutoTUnref<SkImageFilter> offsetBackground(SkOffsetImageFilter::Create( |
| SkIntToScalar(4), SkIntToScalar(4), background)); |
| mode.reset(SkXfermode::Create(SkXfermode::kSrcOver_Mode)); |
| filter.reset(SkXfermodeImageFilter::Create(mode, offsetBackground, offsetForeground)); |
| paint.setImageFilter(filter); |
| 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) |
| mode.reset(SkXfermode::Create(SkXfermode::kDarken_Mode)); |
| filter.reset(SkXfermodeImageFilter::Create(mode, offsetBackground, offsetForeground)); |
| paint.setImageFilter(filter); |
| 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)); |
| mode.reset(SkXfermode::Create(sampledModes[i])); |
| filter.reset(SkXfermodeImageFilter::Create( |
| mode, offsetBackground, offsetForeground, &rect)); |
| paint.setImageFilter(filter); |
| drawClippedPaint(canvas, clipRect, paint, x, y); |
| x += fBitmap.width() + MARGIN; |
| if (x + fBitmap.width() > WIDTH) { |
| x = 0; |
| y += fBitmap.height() + MARGIN; |
| } |
| } |
| } |
| private: |
| SkBitmap fBitmap, fCheckerboard; |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new XfermodeImageFilterGM; ); |
| |
| } |
