| // Copyright (c) 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| #include "components/viz/common/skia_helper.h" |
| #include "base/trace_event/trace_event.h" |
| #include "cc/base/math_util.h" |
| #include "third_party/skia/include/gpu/GrBackendSurface.h" |
| #include "ui/gfx/skia_util.h" |
| |
| namespace viz { |
| sk_sp<SkImage> SkiaHelper::ApplyImageFilter(sk_sp<SkImage> src_image, |
| const gfx::RectF& src_rect, |
| const gfx::RectF& dst_rect, |
| const gfx::Vector2dF& scale, |
| sk_sp<SkImageFilter> filter, |
| SkIPoint* offset, |
| SkIRect* subset, |
| const gfx::PointF& origin) { |
| if (!filter) |
| return nullptr; |
| |
| if (!src_image) { |
| TRACE_EVENT_INSTANT0("viz", |
| "ApplyImageFilter wrap background texture failed", |
| TRACE_EVENT_SCOPE_THREAD); |
| return nullptr; |
| } |
| |
| // Big filters can sometimes fallback to CPU. Therefore, we need |
| // to disable subnormal floats for performance and security reasons. |
| cc::ScopedSubnormalFloatDisabler disabler; |
| SkMatrix local_matrix; |
| local_matrix.setTranslate(origin.x(), origin.y()); |
| local_matrix.postScale(scale.x(), scale.y()); |
| local_matrix.postTranslate(-src_rect.x(), -src_rect.y()); |
| |
| SkIRect clip_bounds = gfx::RectFToSkRect(dst_rect).roundOut(); |
| clip_bounds.offset(-src_rect.x(), -src_rect.y()); |
| |
| filter = filter->makeWithLocalMatrix(local_matrix); |
| SkIRect in_subset = SkIRect::MakeWH(src_rect.width(), src_rect.height()); |
| |
| sk_sp<SkImage> image = src_image->makeWithFilter(filter.get(), in_subset, |
| clip_bounds, subset, offset); |
| if (!image || !image->isTextureBacked()) { |
| return nullptr; |
| } |
| |
| // Force a flush of the Skia pipeline before we switch back to the compositor |
| // context. |
| image->getBackendTexture(true); |
| CHECK(image->isTextureBacked()); |
| return image; |
| } |
| |
| } // namespace viz |