41 lines
1.5 KiB
C++
41 lines
1.5 KiB
C++
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/*
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* Copyright 2019 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/SkPath.h"
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#include "include/core/SkPaint.h"
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// crbug.com/982968
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// Intended to draw a curvy triangle.
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// With the bug, we extend the left side of the triangle with lines, a bit like a flag pole.
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// The bug/fix is related to precision of the calculation. The original impl used all floats,
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// but the very shallow angle causes our sin/cos and other calcs to lose too many bits.
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// The fix was to use doubles for this part of the calc in SkPath::arcTo().
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//
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DEF_SIMPLE_GM(shallow_angle_path_arcto, canvas, 300, 300) {
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SkPath path;
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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path.moveTo(313.44189096331155f, 106.6009423589212f);
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path.arcTo(284.3113082008462f, 207.1407719157063f,
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255.15053777129728f, 307.6718505416374f,
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697212.0011054524f);
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path.lineTo(255.15053777129728f, 307.6718505416374f);
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path.arcTo(340.4737465981018f, 252.6907319346971f,
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433.54333477716153f, 212.18116363345337f,
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1251.2484277907251f);
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path.lineTo(433.54333477716153f, 212.18116363345337f);
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path.arcTo(350.19513833839466f, 185.89280014838369f,
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313.44189096331155f, 106.6009423589212f,
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198.03116885327813f);
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canvas->translate(-200, -50);
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canvas->drawPath(path, paint);
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};
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