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116 lines
2.9 KiB
C++
116 lines
2.9 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGfx/Bitmap.h>
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#include <LibImageDecoderClient/Client.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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int ImageResource::frame_duration(size_t frame_index) const
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{
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decode_if_needed();
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if (frame_index >= m_decoded_frames.size())
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return 0;
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return m_decoded_frames[frame_index].duration;
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}
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static ImageDecoderClient::Client& image_decoder_client()
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{
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static RefPtr<ImageDecoderClient::Client> image_decoder_client;
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if (!image_decoder_client) {
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image_decoder_client = ImageDecoderClient::Client::construct();
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image_decoder_client->on_death = [&] {
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image_decoder_client = nullptr;
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};
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}
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return *image_decoder_client;
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}
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void ImageResource::decode_if_needed() const
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{
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if (!has_encoded_data())
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return;
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if (m_has_attempted_decode)
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return;
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if (!m_decoded_frames.is_empty())
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return;
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NonnullRefPtr decoder = image_decoder_client();
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auto image = decoder->decode_image(encoded_data());
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if (image.has_value()) {
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m_loop_count = image.value().loop_count;
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m_animated = image.value().is_animated;
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m_decoded_frames.resize(image.value().frames.size());
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for (size_t i = 0; i < m_decoded_frames.size(); ++i) {
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auto& frame = m_decoded_frames[i];
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frame.bitmap = image.value().frames[i].bitmap;
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frame.duration = image.value().frames[i].duration;
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}
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}
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m_has_attempted_decode = true;
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}
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const Gfx::Bitmap* ImageResource::bitmap(size_t frame_index) const
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{
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decode_if_needed();
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if (frame_index >= m_decoded_frames.size())
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return nullptr;
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return m_decoded_frames[frame_index].bitmap;
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}
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void ImageResource::update_volatility()
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{
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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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for (auto& frame : m_decoded_frames) {
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if (frame.bitmap)
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frame.bitmap->set_volatile();
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}
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return;
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}
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bool still_has_decoded_image = true;
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for (auto& frame : m_decoded_frames) {
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if (!frame.bitmap) {
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still_has_decoded_image = false;
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} else {
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bool was_purged = false;
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bool bitmap_has_memory = frame.bitmap->set_nonvolatile(was_purged);
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if (!bitmap_has_memory || was_purged)
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still_has_decoded_image = false;
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}
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}
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if (still_has_decoded_image)
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return;
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m_decoded_frames.clear();
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m_has_attempted_decode = false;
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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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