| // Copyright 2019 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. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_MEMORY_MANAGED_PAINT_CANVAS_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_MEMORY_MANAGED_PAINT_CANVAS_H_ |
| |
| #include <memory> |
| |
| #include "cc/paint/paint_canvas.h" |
| #include "cc/paint/record_paint_canvas.h" |
| #include "third_party/blink/public/platform/platform.h" |
| #include "third_party/blink/renderer/platform/wtf/casting.h" |
| #include "third_party/blink/renderer/platform/wtf/hash_set.h" |
| |
| namespace blink { |
| |
| // MemoryManagedPaintCanvas overrides the potentially memory intensive image |
| // drawing methods of PaintCanvas and keeps track of how much memory is |
| // being pinned between flushes. This allows the rendering context to flush if |
| // too much memory is used. |
| class PLATFORM_EXPORT MemoryManagedPaintCanvas final |
| : public cc::RecordPaintCanvas { |
| public: |
| MemoryManagedPaintCanvas(cc::DisplayItemList* list, |
| const SkRect& bounds, |
| base::RepeatingClosure set_needs_flush_callback); |
| explicit MemoryManagedPaintCanvas(const cc::RecordPaintCanvas&) = delete; |
| ~MemoryManagedPaintCanvas() override; |
| |
| void drawImage(const cc::PaintImage& image, |
| SkScalar left, |
| SkScalar top, |
| const SkSamplingOptions&, |
| const cc::PaintFlags* flags) override; |
| void drawImageRect(const cc::PaintImage& image, |
| const SkRect& src, |
| const SkRect& dst, |
| const SkSamplingOptions&, |
| const cc::PaintFlags* flags, |
| SkCanvas::SrcRectConstraint constraint) override; |
| |
| bool IsCachingImage(const cc::PaintImage::ContentId content_id) const; |
| |
| private: |
| void UpdateMemoryUsage(const cc::PaintImage& image); |
| |
| HashSet<cc::PaintImage::ContentId, |
| DefaultHash<cc::PaintImage::ContentId>::Hash, |
| WTF::UnsignedWithZeroKeyHashTraits<cc::PaintImage::ContentId>> |
| cached_image_ids_; |
| uint64_t total_stored_image_memory_ = 0; |
| |
| base::RepeatingClosure set_needs_flush_callback_; |
| |
| // The same value as is used in content::WebGraphicsConext3DProviderImpl. |
| static constexpr uint64_t kMaxPinnedMemory = 64 * 1024 * 1024; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_MEMORY_MANAGED_PAINT_CANVAS_H_ |