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/*
* Copyright 2014 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 "Resources.h"
#include "SkBitmap.h"
#include "SkPaint.h"
#include "SkShader.h"
#include "SkStream.h"
/***
*
* This GM reproduces Skia bug 2904, in which a tiled bitmap shader was failing to draw correctly
* when fractional image scaling was ignored by the high quality bitmap scaler.
*
***/
namespace skiagm {
class TiledScaledBitmapGM : public GM {
public:
TiledScaledBitmapGM() {
}
protected:
SkString onShortName() override {
return SkString("tiledscaledbitmap");
}
SkISize onISize() override {
return SkISize::Make(1016, 616);
}
static SkBitmap make_bm(int width, int height) {
SkBitmap bm;
bm.allocN32Pixels(width, height);
bm.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(bm);
SkPaint paint;
paint.setAntiAlias(true);
canvas.drawCircle(width/2.f, height/2.f, width/4.f, paint);
return bm;
}
void onOnceBeforeDraw() override {
fBitmap = make_bm(360, 288);
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
paint.setFilterQuality(kHigh_SkFilterQuality);
SkMatrix mat;
mat.setScale(121.f/360.f, 93.f/288.f);
mat.postTranslate(-72, -72);
paint.setShader(SkShader::MakeBitmapShader(fBitmap, SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode, &mat));
canvas->drawRect({ 8, 8, 1008, 608 }, paint);
}
private:
SkBitmap fBitmap;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new TiledScaledBitmapGM;)
}
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