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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 "SkImage.h"
#include "SkImageSource.h"
// This GM exercises the SkImageSource ImageFilter class.
class ImageSourceGM : public skiagm::GM {
public:
ImageSourceGM() { }
protected:
SkString onShortName() override {
return SkString("imagesource");
}
SkISize onISize() override { return SkISize::Make(500, 150); }
void onOnceBeforeDraw() override {
SkBitmap bm = sk_tool_utils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
fImage.reset(SkImage::NewFromBitmap(bm));
}
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();
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
{
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 = SkRect::MakeIWH(fImage->width(), fImage->height());
SkAutoTUnref<SkImageFilter> imageSource(SkImageSource::Create(fImage));
SkAutoTUnref<SkImageFilter> imageSourceSrcRect(
SkImageSource::Create(fImage, srcRect, srcRect, kHigh_SkFilterQuality));
SkAutoTUnref<SkImageFilter> imageSourceSrcRectDstRect(
SkImageSource::Create(fImage, srcRect, dstRect, kHigh_SkFilterQuality));
SkAutoTUnref<SkImageFilter> imageSourceDstRectOnly(
SkImageSource::Create(fImage, bounds, dstRect, kHigh_SkFilterQuality));
// Draw an unscaled bitmap.
FillRectFiltered(canvas, clipRect, imageSource);
canvas->translate(SkIntToScalar(100), 0);
// Draw an unscaled subset of the source bitmap (srcRect -> srcRect).
FillRectFiltered(canvas, clipRect, imageSourceSrcRect);
canvas->translate(SkIntToScalar(100), 0);
// Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect).
FillRectFiltered(canvas, clipRect, imageSourceSrcRectDstRect);
canvas->translate(SkIntToScalar(100), 0);
// Draw the entire bitmap scaled to a destination rect (bounds -> dstRect).
FillRectFiltered(canvas, clipRect, imageSourceDstRectOnly);
canvas->translate(SkIntToScalar(100), 0);
}
}
private:
SkAutoTUnref<SkImage> fImage;
typedef GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new ImageSourceGM; )
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