skia2/gm/crbug_996140.cpp
Mike Reed cfb130c662 Add arc methods to path builder
Bug: skia:9000
Change-Id: I0a25c6f792f59230762651386da74e547b073930
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/307558
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2020-08-03 15:50:01 +00:00

81 lines
2.5 KiB
C++

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