81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
/*
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* Copyright 2019 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/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPathBuilder.h"
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/*
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* Canvas example. Expected large blue stroked circle, white middle, small red circle.
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* GPU-accelerated canvas produces large blue stroked circle, white middle, NO red circle.
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*
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* 1: var c = document.getElementById("myCanvas");
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* 2: var ctx = c.getContext("2d");
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* 3: ctx.beginPath();
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* 4: ctx.scale(203.20, 203.20);
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* 5: ctx.translate(-14.55, -711.51);
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* 6: ctx.fillStyle = "red";
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* 7: ctx.strokeStyle = "blue";
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* 8: //ctx.lineWidth = 1/203.20;
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* 9: ctx.arc(19.221, 720-6.76,0.0295275590551181,0,2*Math.PI);
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* 10: ctx.stroke();
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* 11: ctx.fill();
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* 12: ctx.closePath();
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*/
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DEF_SIMPLE_GM_BG(crbug_996140, canvas, 300, 300, SK_ColorWHITE) {
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// Specific parameters taken from the canvas minimum working example
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SkScalar cx = 19.221f;
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SkScalar cy = 720-6.76f;
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SkScalar radius = 0.0295275590551181f;
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SkScalar s = 203.20f;
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SkScalar tx = -14.55f;
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SkScalar ty = -711.51f;
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// 0: The test canvas was 1920x574 and the circle was located in the bottom left, but that's
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// not necessary to reproduce the problem, so translate to make a smaller GM.
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canvas->translate(-800, -200);
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// 3: ctx.beginPath();
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// 4: ctx.scale(203.20, 203.20);
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canvas->scale(s, s);
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// 5: ctx.translate(-14.55, -711.51);
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canvas->translate(tx, ty);
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// 6: ctx.fillStyle = "red";
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SkPaint fill;
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fill.setColor(SK_ColorRED);
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fill.setStyle(SkPaint::kFill_Style);
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fill.setAntiAlias(true);
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// 7: ctx.strokeStyle = "blue";
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SkPaint stroke;
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stroke.setColor(SK_ColorBLUE);
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stroke.setStrokeWidth(1.f);
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stroke.setStyle(SkPaint::kStroke_Style);
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stroke.setAntiAlias(true);
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// 9: ctx.arc(19.221, 720-6.76,0.0295275590551181,0,2*Math.PI);
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// This matches how Canvas prepares an arc(x, y, radius, 0, 2pi) call
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SkRect boundingBox = SkRect::MakeLTRB(cx - radius, cy - radius, cx + radius, cy + radius);
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auto path = SkPathBuilder().arcTo(boundingBox, 0, 180.f, false)
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.arcTo(boundingBox, 180.f, 180.f, false)
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.detach();
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// 12: ctx.closePath();
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// path.close();
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// 10: ctx.stroke(); (NOT NEEDED TO REPRODUCE FAILING RED CIRCLE)
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canvas->drawPath(path, stroke);
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// 11: ctx.fill()
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canvas->drawPath(path, fill);
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}
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