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Diffstat (limited to 'gm/bitmapsource.cpp')
-rw-r--r-- | gm/bitmapsource.cpp | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/gm/bitmapsource.cpp b/gm/bitmapsource.cpp new file mode 100644 index 0000000000..d6e98a5bbd --- /dev/null +++ b/gm/bitmapsource.cpp @@ -0,0 +1,91 @@ +/* + * 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 "SkBitmapSource.h" + +// This GM exercises the SkBitmapSource ImageFilter class. + +class BitmapSourceGM : public skiagm::GM { +public: + BitmapSourceGM() { + } + +protected: + virtual SkString onShortName() SK_OVERRIDE { + return SkString("bitmapsource"); + } + + void makeBitmap() { + fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100); + fBitmap.allocPixels(); + SkBitmapDevice device(fBitmap); + SkCanvas canvas(&device); + canvas.clear(0x00000000); + SkPaint paint; + paint.setAntiAlias(true); + paint.setColor(0xFFFFFFFF); + paint.setTextSize(SkIntToScalar(96)); + const char* str = "e"; + canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint); + } + + virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(500, 150); } + + virtual void onOnceBeforeDraw() SK_OVERRIDE { + this->makeBitmap(); + } + + static void fillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkImageFilter* filter) { + SkPaint paint; + paint.setImageFilter(filter); + canvas->save(); + canvas->clipRect(clipRect); + canvas->drawPaint(paint); + canvas->restore(); + } + + virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { + canvas->clear(0x00000000); + { + SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30); + SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60); + SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100); + SkRect bounds; + fBitmap.getBounds(&bounds); + SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap)); + SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(new SkBitmapSource(fBitmap, srcRect, srcRect)); + SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(new SkBitmapSource(fBitmap, srcRect, dstRect)); + SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(new SkBitmapSource(fBitmap, bounds, dstRect)); + + // Draw an unscaled bitmap. + fillRectFiltered(canvas, clipRect, bitmapSource); + canvas->translate(SkIntToScalar(100), 0); + + // Draw an unscaled subset of the source bitmap (srcRect -> srcRect). + fillRectFiltered(canvas, clipRect, bitmapSourceSrcRect); + canvas->translate(SkIntToScalar(100), 0); + + // Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect). + fillRectFiltered(canvas, clipRect, bitmapSourceSrcRectDstRect); + canvas->translate(SkIntToScalar(100), 0); + + // Draw the entire bitmap scaled to a destination rect (bounds -> dstRect). + fillRectFiltered(canvas, clipRect, bitmapSourceDstRectOnly); + canvas->translate(SkIntToScalar(100), 0); + } + } + +private: + SkBitmap fBitmap; + typedef GM INHERITED; +}; + +/////////////////////////////////////////////////////////////////////////////// + +DEF_GM( return new BitmapSourceGM; ) |