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