43 lines
2.0 KiB
C++
43 lines
2.0 KiB
C++
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/*
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* Copyright 2021 Google LLC
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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/SkCanvas.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkRect.h"
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// Outsetting of very thin, nearly line, quads for AA would go haywire and draw far outside of the
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// quad. Artifacts seemed to occur more when coord values are large, hence the large GM size. At the
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// time of GM creation this was fixed by dropping AA, which makes these quads practically never draw
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// as it's very unlikely a pixel center would fall inside the geometry.
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DEF_SIMPLE_GM(crbug_1174186, canvas, 1200, 1200) {
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auto m = SkMatrix::MakeAll(
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SkBits2Float(0x24480629), SkBits2Float(0xbf3555c2), SkBits2Float(0x4377d67b),
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SkBits2Float(0x23a61d51), SkBits2Float(0x3f34b400), SkBits2Float(0x4453f572),
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SkBits2Float(0x00000000), SkBits2Float(0x00000000), SkBits2Float(0x3f800000));
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SkPoint pts[] = {{SkBits2Float(0x3f7ffff2), SkBits2Float(0x43483d60)},
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{SkBits2Float(0x00000000), SkBits2Float(0x43483d60)},
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{SkBits2Float(0x00000000), SkBits2Float(0x4311a628)},
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{SkBits2Float(0x3f800000), SkBits2Float(0x43130f8c)}};
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SkColor color = SK_ColorGREEN;
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canvas->translate(-500, 0);
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for (int i = 0; i < 10; ++i) {
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for (int flags = 0; flags < static_cast<int>(SkCanvas::kAll_QuadAAFlags); ++flags) {
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SkCanvas::QuadAAFlags aaFlags = static_cast<SkCanvas::QuadAAFlags>(flags);
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canvas->save();
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canvas->concat(m);
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canvas->experimental_DrawEdgeAAQuad(SkRect::MakeWH(1000, 1000), pts, aaFlags, color,
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SkBlendMode::kSrcOver);
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canvas->restore();
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canvas->translate(5.1f, 0);
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SkColor rgb = color & 0x00FFFFFF;
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color = 0xFF000000 | (rgb << 4) | (rgb >> 20);
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}
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}
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}
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