skia2/gm/crbug_892988.cpp
Ben Wagner 7fde8e1728 IWYU for gms.
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

34 lines
1.3 KiB
C++

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