/* * 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: 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(); } } } 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(); } void onOnceBeforeDraw() SK_OVERRIDE { make_bitmap(); make_checkerboard(); } 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 background(SkBitmapSource::Create(fCheckerboard)); for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) { SkAutoTUnref mode(SkXfermode::Create(gModes[i].fMode)); SkAutoTUnref 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 mode(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0)); SkAutoTUnref 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 foreground(SkBitmapSource::Create(fBitmap)); SkAutoTUnref offsetForeground(SkOffsetImageFilter::Create( SkIntToScalar(4), SkIntToScalar(-4), foreground)); SkAutoTUnref 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; ); }