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- // Copyright 2017 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 CC_PAINT_DECODE_STASHING_IMAGE_PROVIDER_H_
- #define CC_PAINT_DECODE_STASHING_IMAGE_PROVIDER_H_
- #include "base/containers/stack_container.h"
- #include "cc/paint/image_provider.h"
- #include "cc/paint/paint_export.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:
- ImageProvider* source_provider_;
- base::StackVector<ScopedResult, 1> decoded_images_;
- };
- } // namespace cc
- #endif // CC_PAINT_DECODE_STASHING_IMAGE_PROVIDER_H_
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