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ImageDecoder: Handle decoding of images in an asynchronous manner

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ImageDecoder now queues up image decoding requests and returns the
images back to the caller later. ImageDecoderClient has a new
promise-based API that allows callers to attach their own resolve/reject
handlers to the responses from ImageDecoder.
This commit is contained in:
Andrew Kaster
2024-04-19 14:23:16 -06:00
committed by Andrew Kaster
parent 0d8064fafc
commit b871bc082c
6 changed files with 132 additions and 31 deletions
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46
Userland/Services/ImageDecoder/ConnectionFromClient.cpp
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@@ -72,20 +72,50 @@ static void decode_image_to_details(Core::AnonymousBuffer const& encoded_buffer,
decode_image_to_bitmaps_and_durations_with_decoder(*decoder, ideal_size, bitmaps, durations);
}
ConnectionFromClient::Job ConnectionFromClient::make_decode_image_job(i64 image_id, Core::AnonymousBuffer encoded_buffer, Optional<Gfx::IntSize> ideal_size, Optional<ByteString> mime_type)
{
return [strong_this = NonnullRefPtr(*this), image_id, encoded_buffer = move(encoded_buffer), ideal_size = move(ideal_size), mime_type = move(mime_type)]() {
bool is_animated = false;
u32 loop_count = 0;
Gfx::FloatPoint scale { 1, 1 };
Vector<Gfx::ShareableBitmap> bitmaps;
Vector<u32> durations;
decode_image_to_details(encoded_buffer, ideal_size, mime_type, is_animated, loop_count, bitmaps, durations, scale);
if (bitmaps.is_empty()) {
strong_this->async_did_fail_to_decode_image(image_id, "Could not decode image"_string);
} else {
strong_this->async_did_decode_image(image_id, is_animated, loop_count, bitmaps, durations, scale);
}
};
}
Messages::ImageDecoderServer::DecodeImageResponse ConnectionFromClient::decode_image(Core::AnonymousBuffer const& encoded_buffer, Optional<Gfx::IntSize> const& ideal_size, Optional<ByteString> const& mime_type)
{
auto image_id = m_next_image_id++;
if (!encoded_buffer.is_valid()) {
dbgln_if(IMAGE_DECODER_DEBUG, "Encoded data is invalid");
return nullptr;
async_did_fail_to_decode_image(image_id, "Encoded data is invalid"_string);
return image_id;
}
bool is_animated = false;
u32 loop_count = 0;
Gfx::FloatPoint scale { 1, 1 };
Vector<Gfx::ShareableBitmap> bitmaps;
Vector<u32> durations;
decode_image_to_details(encoded_buffer, ideal_size, mime_type, is_animated, loop_count, bitmaps, durations, scale);
return { is_animated, loop_count, bitmaps, durations, scale };
m_pending_jobs.set(image_id, make_decode_image_job(image_id, encoded_buffer, ideal_size, mime_type));
Core::deferred_invoke([strong_this = NonnullRefPtr(*this), image_id]() {
if (auto job = strong_this->m_pending_jobs.take(image_id); job.has_value()) {
job.value()();
}
});
return image_id;
}
void ConnectionFromClient::cancel_decoding(i64 image_id)
{
if (auto job = m_pending_jobs.take(image_id); job.has_value()) {
async_did_fail_to_decode_image(image_id, "Decoding was canceled"_string);
}
}
}