blob: 05a50ce413a58da4d2ab53c33b3c8d74271f7443 [file] [log] [blame]
* Copyright 2022 Google LLC
* 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/SkMatrix.h"
#include "include/core/SkRect.h"
#include "include/effects/SkImageFilters.h"
// SkiaRenderer can wind up specifying near-integer scale-and-translate matrices on SkCanvas before
// applying a backdrop blur image filter via saveLayer() with an integer clip, crop rect, and
// SaveLayerRec bounds. Round-out is used to determine the bounds of the input image needed in IFs.
// This could cause an extra row/column of pixels to be included in the blur. When that row/column
// is significantly different in color than the intended blur content and the radius is large then
// clamp mode blur creates a very noticeable color bleed artifact.
DEF_SIMPLE_GM(crbug_1313579, canvas, 110, 110) {
static constexpr auto kBGRect = SkIRect{0, 0, 100, 100};
sk_sp<SkImageFilter> backdrop_filter =
SkImageFilters::Blur(50.f, 50.f, SkTileMode::kClamp, nullptr);
sk_sp<SkImageFilter> crop = SkImageFilters::Offset(0, 0, nullptr, &kBGRect);
backdrop_filter = SkImageFilters::Compose(
crop, SkImageFilters::Compose(std::move(backdrop_filter), crop));
SkMatrix m;
m.setAll(0.999999f, 0, 4.99999f,
0, 0.999999f, 4.99999f,
0, 0, 1);
canvas->saveLayer(SkCanvas::SaveLayerRec(nullptr, nullptr, backdrop_filter.get(), 0));