| /* |
| * Copyright 2012 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 "SkBlendImageFilter.h" |
| #include "SkBitmapSource.h" |
| |
| namespace skiagm { |
| |
| class ImageBlendGM : public GM { |
| public: |
| ImageBlendGM() : fInitialized(false) { |
| this->setBGColor(0xFF000000); |
| } |
| |
| protected: |
| virtual SkString onShortName() { |
| return SkString("blend"); |
| } |
| |
| void make_bitmap() { |
| fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 80, 80); |
| fBitmap.allocPixels(); |
| SkDevice device(fBitmap); |
| SkCanvas canvas(&device); |
| canvas.clear(0x00000000); |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| 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.setConfig(SkBitmap::kARGB_8888_Config, 80, 80); |
| fCheckerboard.allocPixels(); |
| SkDevice device(fCheckerboard); |
| SkCanvas canvas(&device); |
| 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() { |
| return make_isize(500, 100); |
| } |
| |
| void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x) { |
| canvas->save(); |
| canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), 0, |
| SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height()))); |
| canvas->drawBitmap(fBitmap, SkIntToScalar(x), 0, &paint); |
| canvas->restore(); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| if (!fInitialized) { |
| make_bitmap(); |
| make_checkerboard(); |
| fInitialized = true; |
| } |
| canvas->clear(0x00000000); |
| SkPaint paint; |
| SkAutoTUnref<SkImageFilter> background(SkNEW_ARGS(SkBitmapSource, (fCheckerboard))); |
| paint.setImageFilter(SkNEW_ARGS(SkBlendImageFilter, (SkBlendImageFilter::kNormal_Mode, background)))->unref(); |
| drawClippedBitmap(canvas, paint, 0); |
| paint.setImageFilter(SkNEW_ARGS(SkBlendImageFilter, (SkBlendImageFilter::kModulate_Mode, background)))->unref(); |
| drawClippedBitmap(canvas, paint, 100); |
| paint.setImageFilter(SkNEW_ARGS(SkBlendImageFilter, (SkBlendImageFilter::kScreen_Mode, background)))->unref(); |
| drawClippedBitmap(canvas, paint, 200); |
| paint.setImageFilter(SkNEW_ARGS(SkBlendImageFilter, (SkBlendImageFilter::kDarken_Mode, background)))->unref(); |
| drawClippedBitmap(canvas, paint, 300); |
| paint.setImageFilter(SkNEW_ARGS(SkBlendImageFilter, (SkBlendImageFilter::kLighten_Mode, background)))->unref(); |
| drawClippedBitmap(canvas, paint, 400); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| SkBitmap fBitmap, fCheckerboard; |
| bool fInitialized; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new ImageBlendGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |