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ImageDecoder: Pass decoded images as Gfx::Bitmap over IPC

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Before this change, we were passing them as Gfx::ShareableBitmap. The
problem is that shareable bitmaps keep their underlying file descriptor
open, so that they can be shared again with someone else.

When a Gfx::Bitmap is decoded from an IPC message, the file descriptor
is closed and recovered immediately.

This fixes an issue where we'd accumulate one file descriptor for every
image decoded. This eventually led to descriptor starvation after enough
images were loaded and still referenced at the same time.
This commit is contained in:
Andreas Kling
2024-07-17 19:14:44 +02:00
committed by Andreas Kling
parent 9f1a853cc8
commit 166e603c5e
5 changed files with 9 additions and 9 deletions
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6
Userland/Services/ImageDecoder/ConnectionFromClient.cpp
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@@ -75,16 +75,16 @@ Messages::ImageDecoderServer::ConnectNewClientsResponse ConnectionFromClient::co
return files;
}
static void decode_image_to_bitmaps_and_durations_with_decoder(Gfx::ImageDecoder const& decoder, Optional<Gfx::IntSize> ideal_size, Vector<Gfx::ShareableBitmap>& bitmaps, Vector<u32>& durations)
static void decode_image_to_bitmaps_and_durations_with_decoder(Gfx::ImageDecoder const& decoder, Optional<Gfx::IntSize> ideal_size, Vector<Optional<NonnullRefPtr<Gfx::Bitmap>>>& bitmaps, Vector<u32>& durations)
{
for (size_t i = 0; i < decoder.frame_count(); ++i) {
auto frame_or_error = decoder.frame(i, ideal_size);
if (frame_or_error.is_error()) {
bitmaps.append(Gfx::ShareableBitmap {});
bitmaps.append({});
durations.append(0);
} else {
auto frame = frame_or_error.release_value();
bitmaps.append(frame.image->to_shareable_bitmap());
bitmaps.append(frame.image.release_nonnull());
durations.append(frame.duration);
}
}