| // Copyright 2017 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CC_PAINT_DECODE_STASHING_IMAGE_PROVIDER_H_ |
| #define CC_PAINT_DECODE_STASHING_IMAGE_PROVIDER_H_ |
| |
| #include "base/memory/raw_ptr.h" |
| #include "cc/paint/image_provider.h" |
| #include "cc/paint/paint_export.h" |
| #include "third_party/abseil-cpp/absl/container/inlined_vector.h" |
| |
| namespace cc { |
| // An ImageProvider that passes decode requests through to the |
| // |source_provider| but keeps the decode cached throughtout its lifetime, |
| // instead of passing the ref to the caller. |
| class CC_PAINT_EXPORT DecodeStashingImageProvider : public ImageProvider { |
| public: |
| // |source_provider| must outlive this class. |
| explicit DecodeStashingImageProvider(ImageProvider* source_provider); |
| DecodeStashingImageProvider(const DecodeStashingImageProvider&) = delete; |
| ~DecodeStashingImageProvider() override; |
| |
| DecodeStashingImageProvider& operator=(const DecodeStashingImageProvider&) = |
| delete; |
| |
| // ImageProvider implementation. |
| ImageProvider::ScopedResult GetRasterContent( |
| const DrawImage& draw_image) override; |
| |
| // Releases all stashed images. The caller must ensure that it is safe to |
| // unlock any images acquired before this. |
| void Reset(); |
| |
| private: |
| raw_ptr<ImageProvider> source_provider_; |
| absl::InlinedVector<ScopedResult, 1> decoded_images_; |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_PAINT_DECODE_STASHING_IMAGE_PROVIDER_H_ |