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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 "SkBlurMaskFilter.h"
#include "SkColorFilter.h"
#include "SkPath.h"
namespace skiagm {
/**
* This test exercises bug 1719. An anti-aliased blurred path is rendered through a soft clip. On
* the GPU a scratch texture was used to hold the original path mask as well as the blurred path
* result. The same texture is then incorrectly used to generate the soft clip mask for the draw.
* Thus the same texture is used for both the blur mask and soft mask in a single draw.
*
* The correct image should look like a thin stroked round rect.
*/
class SkBug1719GM : public GM {
public:
SkBug1719GM() {}
protected:
SkString onShortName() override {
return SkString("skbug1719");
}
SkISize onISize() override {
return SkISize::Make(300, 100);
}
void onDrawBackground(SkCanvas* canvas) override {
SkPaint bgPaint;
bgPaint.setColor(sk_tool_utils::color_to_565(0xFF303030));
canvas->drawPaint(bgPaint);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(SkIntToScalar(-800), SkIntToScalar(-650));
// The data is lifted from an SKP that exhibited the bug.
// This is a round rect.
SkPath clipPath;
clipPath.moveTo(832.f, 654.f);
clipPath.lineTo(1034.f, 654.f);
clipPath.cubicTo(1038.4183f, 654.f, 1042.f, 657.58173f, 1042.f, 662.f);
clipPath.lineTo(1042.f, 724.f);
clipPath.cubicTo(1042.f, 728.41827f, 1038.4183f, 732.f, 1034.f, 732.f);
clipPath.lineTo(832.f, 732.f);
clipPath.cubicTo(827.58173f, 732.f, 824.f, 728.41827f, 824.f, 724.f);
clipPath.lineTo(824.f, 662.f);
clipPath.cubicTo(824.f, 657.58173f, 827.58173f, 654.f, 832.f, 654.f);
clipPath.close();
// This is a round rect nested inside a rect.
SkPath drawPath;
drawPath.moveTo(823.f, 653.f);
drawPath.lineTo(1043.f, 653.f);
drawPath.lineTo(1043.f, 733.f);
drawPath.lineTo(823.f, 733.f);
drawPath.lineTo(823.f, 653.f);
drawPath.close();
drawPath.moveTo(832.f, 654.f);
drawPath.lineTo(1034.f, 654.f);
drawPath.cubicTo(1038.4183f, 654.f, 1042.f, 657.58173f, 1042.f, 662.f);
drawPath.lineTo(1042.f, 724.f);
drawPath.cubicTo(1042.f, 728.41827f, 1038.4183f, 732.f, 1034.f, 732.f);
drawPath.lineTo(832.f, 732.f);
drawPath.cubicTo(827.58173f, 732.f, 824.f, 728.41827f, 824.f, 724.f);
drawPath.lineTo(824.f, 662.f);
drawPath.cubicTo(824.f, 657.58173f, 827.58173f, 654.f, 832.f, 654.f);
drawPath.close();
drawPath.setFillType(SkPath::kEvenOdd_FillType);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0xFF000000);
paint.setMaskFilter(
SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
0.78867501f,
SkBlurMaskFilter::kHighQuality_BlurFlag))->unref();
paint.setColorFilter(
SkColorFilter::CreateModeFilter(0xBFFFFFFF, SkXfermode::kSrcIn_Mode))->unref();
canvas->clipPath(clipPath, SkRegion::kIntersect_Op, true);
canvas->drawPath(drawPath, paint);
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new SkBug1719GM;)
}
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