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93 lines
2.7 KiB
93 lines
2.7 KiB
4 months ago
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/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkClipOpPriv.h"
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#include "SkColorFilter.h"
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#include "SkMaskFilter.h"
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#include "SkPaint.h"
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#include "SkRRect.h"
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namespace skiagm {
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// This GM reproduces the precision artifacts seen in crbug.com/560651.
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// It draws a largish blurred circle with its center clipped out.
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class BlurredClippedCircleGM : public GM {
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public:
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BlurredClippedCircleGM() {
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this->setBGColor(0xFFCCCCCC);
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}
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protected:
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SkString onShortName() override {
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return SkString("blurredclippedcircle");
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}
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SkISize onISize() override {
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return SkISize::Make(kWidth, kHeight);
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint whitePaint;
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whitePaint.setColor(SK_ColorWHITE);
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whitePaint.setBlendMode(SkBlendMode::kSrc);
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whitePaint.setAntiAlias(true);
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// This scale exercises precision limits in the circle blur effect (crbug.com/560651)
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constexpr float kScale = 2.0f;
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canvas->scale(kScale, kScale);
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canvas->save();
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SkRect clipRect1 = SkRect::MakeLTRB(0, 0,
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SkIntToScalar(kWidth), SkIntToScalar(kHeight));
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canvas->clipRect(clipRect1);
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canvas->save();
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canvas->clipRect(clipRect1);
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canvas->drawRect(clipRect1, whitePaint);
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canvas->save();
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SkRect clipRect2 = SkRect::MakeLTRB(8, 8, 288, 288);
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SkRRect clipRRect = SkRRect::MakeOval(clipRect2);
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canvas->clipRRect(clipRRect, kDifference_SkClipOp, true);
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SkRect r = SkRect::MakeLTRB(4, 4, 292, 292);
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SkRRect rr = SkRRect::MakeOval(r);
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SkPaint paint;
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paint.setMaskFilter(SkMaskFilter::MakeBlur(
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kNormal_SkBlurStyle,
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1.366025f));
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paint.setColorFilter(SkColorFilter::MakeModeFilter(
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SK_ColorRED,
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SkBlendMode::kSrcIn));
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paint.setAntiAlias(true);
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canvas->drawRRect(rr, paint);
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canvas->restore();
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canvas->restore();
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canvas->restore();
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}
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private:
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static constexpr int kWidth = 1164;
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static constexpr int kHeight = 802;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new BlurredClippedCircleGM;)
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}
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