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/*
* 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.allocN32Pixels(100, 100);
SkCanvas canvas(fBitmap);
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; )
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