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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 "SkColor.h"
#include "SkImageSource.h"
#include "SkRefCnt.h"
#include "SkSurface.h"
namespace skiagm {
class ResizeGM : public GM {
public:
ResizeGM() {
this->setBGColor(0x00000000);
}
protected:
virtual SkString onShortName() {
return SkString("resizeimagefilter");
}
void draw(SkCanvas* canvas,
const SkRect& rect,
const SkSize& deviceSize,
SkFilterQuality filterQuality,
SkImageFilter* input = nullptr) {
SkRect dstRect;
canvas->getTotalMatrix().mapRect(&dstRect, rect);
canvas->save();
SkScalar deviceScaleX = deviceSize.width() / dstRect.width();
SkScalar deviceScaleY = deviceSize.height() / dstRect.height();
canvas->translate(rect.x(), rect.y());
canvas->scale(deviceScaleX, deviceScaleY);
canvas->translate(-rect.x(), -rect.y());
SkMatrix matrix;
matrix.setScale(SkScalarInvert(deviceScaleX),
SkScalarInvert(deviceScaleY));
SkAutoTUnref<SkImageFilter> imageFilter(
SkImageFilter::CreateMatrixFilter(matrix, filterQuality, input));
SkPaint filteredPaint;
filteredPaint.setImageFilter(imageFilter.get());
canvas->saveLayer(&rect, &filteredPaint);
SkPaint paint;
paint.setColor(0xFF00FF00);
SkRect ovalRect = rect;
ovalRect.inset(SkIntToScalar(4), SkIntToScalar(4));
canvas->drawOval(ovalRect, paint);
canvas->restore(); // for saveLayer
canvas->restore();
}
virtual SkISize onISize() {
return SkISize::Make(520, 100);
}
virtual void onDraw(SkCanvas* canvas) {
canvas->clear(SK_ColorBLACK);
SkRect srcRect = SkRect::MakeWH(96, 96);
SkSize deviceSize = SkSize::Make(16, 16);
draw(canvas,
srcRect,
deviceSize,
kNone_SkFilterQuality);
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
draw(canvas,
srcRect,
deviceSize,
kLow_SkFilterQuality);
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
draw(canvas,
srcRect,
deviceSize,
kMedium_SkFilterQuality);
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
draw(canvas,
srcRect,
deviceSize,
kHigh_SkFilterQuality);
SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(16, 16));
SkCanvas* surfaceCanvas = surface->getCanvas();
surfaceCanvas->clear(0x000000);
{
SkPaint paint;
paint.setColor(0xFF00FF00);
SkRect ovalRect = SkRect::MakeWH(16, 16);
ovalRect.inset(SkIntToScalar(2)/3, SkIntToScalar(2)/3);
surfaceCanvas->drawOval(ovalRect, paint);
}
SkAutoTUnref<SkImage> image(surface->newImageSnapshot());
SkRect inRect = SkRect::MakeXYWH(-4, -4, 20, 20);
SkRect outRect = SkRect::MakeXYWH(-24, -24, 120, 120);
SkAutoTUnref<SkImageFilter> source(
SkImageSource::Create(image, inRect, outRect, kHigh_SkFilterQuality));
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
draw(canvas,
srcRect,
deviceSize,
kHigh_SkFilterQuality,
source.get());
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ResizeGM; }
static GMRegistry reg(MyFactory);
}
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