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LibWeb: Add API to allow DecodedImageData to paint itself directly

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Instead of painting DecodedImageData by first asking it for a bitmap
and then painting that, this commit adds two new APIs:

- frame_rect(frame_index):

    Gets the size of the animation frame at the given index.

- paint(context, ...):

    Paints the DecodedImageData into a DisplayListRecordingContext.

The main powerful thing here is that this allows SVGDecodedImageData
to render itself using the GPU when available.
This commit is contained in:
Andreas Kling
2025-11-04 21:20:00 +01:00
committed by Andreas Kling
parent cebd4cc10d
commit 4c2a02370d
Notes: github-actions[bot] 2025-11-05 08:13:04 +00:00 
Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/4c2a02370d9
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6699
Reviewed-by: https://github.com/kalenikaliaksandr
6 changed files with 97 additions and 5 deletions
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12
Libraries/LibWeb/HTML/AnimatedBitmapDecodedImageData.cpp
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@@ -8,6 +8,8 @@
#include <LibGfx/Bitmap.h>
#include <LibJS/Runtime/Realm.h>
#include <LibWeb/HTML/AnimatedBitmapDecodedImageData.h>
#include <LibWeb/Painting/DisplayListRecorder.h>
#include <LibWeb/Painting/DisplayListRecordingContext.h>
namespace Web::HTML {
@@ -56,4 +58,14 @@ Optional<CSSPixelFraction> AnimatedBitmapDecodedImageData::intrinsic_aspect_rati
return CSSPixels(m_frames.first().bitmap->width()) / CSSPixels(m_frames.first().bitmap->height());
}
Optional<Gfx::IntRect> AnimatedBitmapDecodedImageData::frame_rect(size_t frame_index) const
{
return m_frames[frame_index].bitmap->rect();
}
void AnimatedBitmapDecodedImageData::paint(DisplayListRecordingContext& context, size_t frame_index, Gfx::IntRect dst_rect, Gfx::IntRect clip_rect, Gfx::ScalingMode scaling_mode) const
{
context.display_list_recorder().draw_scaled_immutable_bitmap(dst_rect, clip_rect, *m_frames[frame_index].bitmap, scaling_mode);
}
}