34 lines
1.3 KiB
C++
34 lines
1.3 KiB
C++
/*
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* Copyright 2018 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/gm.h"
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#include "include/core/SkBlendMode.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRect.h"
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// The root cause of this bug was that when dual source blending was not supported and we made a
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// copy of the destination to perform blending we would clip the copy bounds to the current clip.
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// However, it is possible for anti-aliased that are fully contained by the clip in a geometric
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// sense to actually draw outside the clip in pixel space because we don't consider aa bloat when
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// determining if the draw is contained by the clip.
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DEF_SIMPLE_GM(crbug_892988, canvas, 256, 256) {
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SkPaint paint1;
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paint1.setStyle(SkPaint::kStroke_Style);
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paint1.setStrokeWidth(1.f);
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paint1.setAntiAlias(true);
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canvas->drawRect(SkRect::MakeLTRB(11.5, 0.5, 245.5, 245.5), paint1);
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canvas->clipRect(SkRect::MakeLTRB(12, 1, 244, 244), true);
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SkPaint paint2;
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// Use src mode with a non-opaque color to produce a blend that can't be handled with
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// simple blend coefficients.
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paint2.setColor(0xF0FFFFFF);
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paint2.setBlendMode(SkBlendMode::kSrc);
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paint2.setAntiAlias(true);
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canvas->drawRect(SkRect::MakeLTRB(12, 1, 244, 244), paint2);
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}
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