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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 "SkBicubicImageFilter.h"
namespace skiagm {
class BicubicGM : public GM {
public:
BicubicGM() : fInitialized(false) {
this->setBGColor(0x00000000);
}
protected:
virtual uint32_t onGetFlags() const SK_OVERRIDE {
return kSkipTiled_Flag;
}
virtual SkString onShortName() {
return SkString("bicubicfilter");
}
void make_checkerboard(int width, int height) {
SkASSERT(width % 2 == 0);
SkASSERT(height % 2 == 0);
fCheckerboard.allocN32Pixels(width, height);
for (int y = 0; y < height; y += 2) {
SkPMColor* s = fCheckerboard.getAddr32(0, y);
for (int x = 0; x < width; x += 2) {
*s++ = 0xFFFFFFFF;
*s++ = 0xFF000000;
}
s = fCheckerboard.getAddr32(0, y + 1);
for (int x = 0; x < width; x += 2) {
*s++ = 0xFF000000;
*s++ = 0xFFFFFFFF;
}
}
}
virtual SkISize onISize() {
return SkISize::Make(400, 300);
}
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
make_checkerboard(4, 4);
fInitialized = true;
}
SkScalar sk32 = SkIntToScalar(32);
canvas->clear(0x00000000);
SkPaint bilinearPaint, bicubicPaint;
SkSize scale = SkSize::Make(sk32, sk32);
canvas->save();
canvas->scale(sk32, sk32);
bilinearPaint.setFilterLevel(SkPaint::kLow_FilterLevel);
canvas->drawBitmap(fCheckerboard, 0, 0, &bilinearPaint);
canvas->restore();
SkAutoTUnref<SkImageFilter> bicubic(SkBicubicImageFilter::CreateMitchell(scale));
bicubicPaint.setImageFilter(bicubic);
SkRect srcBounds;
fCheckerboard.getBounds(&srcBounds);
canvas->translate(SkIntToScalar(140), 0);
canvas->saveLayer(&srcBounds, &bicubicPaint);
canvas->drawBitmap(fCheckerboard, 0, 0);
canvas->restore();
}
private:
typedef GM INHERITED;
SkBitmap fCheckerboard;
bool fInitialized;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new BicubicGM; }
static GMRegistry reg(MyFactory);
}
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