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https://github.com/RGBCube/serenity
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d4ddb0013c
This patch adds ImageResource as a subclass of Resource. This new class also keeps a Gfx::ImageDecoder so that we can share decoded bitmaps between all clients of an image resource inside LibWeb. With this, we now share both encoded and decoded data for images. :^) I had to change how the purgeable-volatile flag is updated to keep the volatile-images-outside-the-visible-viewport optimization working. HTMLImageElement now inherits from ImageResourceClient (a subclass of ResourceClient with additional image-specific stuff) and informs its ImageResource about whether it's inside the viewport or outside. This is pretty awesome! :^)
59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <LibWeb/Loader/Resource.h>
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namespace Web {
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class ImageResource final : public Resource {
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friend class Resource;
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public:
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virtual ~ImageResource() override;
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Gfx::ImageDecoder& ensure_decoder();
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void update_volatility();
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private:
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explicit ImageResource(const LoadRequest&);
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RefPtr<Gfx::ImageDecoder> m_decoder;
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};
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class ImageResourceClient : public ResourceClient {
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public:
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virtual ~ImageResourceClient();
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virtual bool is_visible_in_viewport() const { return false; }
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virtual void resource_did_replace_decoder() {}
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protected:
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ImageResource* resource() { return static_cast<ImageResource*>(ResourceClient::resource()); }
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const ImageResource* resource() const { return static_cast<const ImageResource*>(ResourceClient::resource()); }
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};
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}
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