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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! :^)
80 lines
2.5 KiB
C++
80 lines
2.5 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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#include <AK/Function.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/ImageDecoder.h>
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#include <LibWeb/Loader/ImageResource.h>
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namespace Web {
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ImageResource::ImageResource(const LoadRequest& request)
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: Resource(Type::Image, request)
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{
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}
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ImageResource::~ImageResource()
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{
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}
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Gfx::ImageDecoder& ImageResource::ensure_decoder()
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{
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if (!m_decoder)
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m_decoder = Gfx::ImageDecoder::create(encoded_data());
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return *m_decoder;
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}
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void ImageResource::update_volatility()
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{
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if (!m_decoder)
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return;
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bool visible_in_viewport = false;
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for_each_client([&](auto& client) {
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if (static_cast<const ImageResourceClient&>(client).is_visible_in_viewport())
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visible_in_viewport = true;
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});
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if (!visible_in_viewport) {
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m_decoder->set_volatile();
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return;
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}
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bool still_has_decoded_image = m_decoder->set_nonvolatile();
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if (still_has_decoded_image)
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return;
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m_decoder = nullptr;
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for_each_client([&](auto& client) {
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static_cast<ImageResourceClient&>(client).resource_did_replace_decoder();
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});
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}
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ImageResourceClient::~ImageResourceClient()
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{
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}
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}
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