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ImageDecoder+LibImageDecoder+LibWeb: Support animations in ImageDecoder

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The ImageDecoder service now returns a list of image frames, each with
a duration value.

The code for in-process image decoding is removed from LibWeb, an all
image decode requests are sent out-of-process to ImageDecoder. :^)

This won't scale super well to very long and/or large animations, but
we can work on improving that separately. The main goal here is simply
to stop doing any image decoding inside LibWeb.

Fixes #5165.
This commit is contained in:
Andreas Kling 2021-01-29 22:30:48 +01:00
parent 449d56ef74
commit 7449c1b27f
10 changed files with 143 additions and 73 deletions
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33
Userland/Libraries/LibWeb/Loader/ImageResource.h
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@ -35,17 +35,40 @@ class ImageResource final : public Resource {
public:
virtual ~ImageResource() override;
Gfx::ImageDecoder& ensure_decoder();
const Gfx::Bitmap* bitmap(size_t frame_index = 0) const;
bool should_decode_in_process() const;
struct Frame {
RefPtr<Gfx::Bitmap> bitmap;
size_t duration { 0 };
};
const Gfx::Bitmap* bitmap(size_t frame_index = 0) const;
int frame_duration(size_t frame_index) const;
size_t frame_count() const
{
decode_if_needed();
return m_decoded_frames.size();
}
bool is_animated() const
{
decode_if_needed();
return m_animated;
}
size_t loop_count() const
{
decode_if_needed();
return m_loop_count;
}
void update_volatility();
private:
explicit ImageResource(const LoadRequest&);
RefPtr<Gfx::ImageDecoder> m_decoder;
mutable RefPtr<Gfx::Bitmap> m_decoded_image;
void decode_if_needed() const;
mutable bool m_animated { false };
mutable int m_loop_count { 0 };
mutable Vector<Frame> m_decoded_frames;
mutable bool m_has_attempted_decode { false };
};