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LibWeb: Null-check surface before allocating painter for context2d
Fixes https://github.com/LadybirdBrowser/ladybird/issues/2755
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Notes:
github-actions[bot]
2024-12-04 15:59:49 +00:00
Author: https://github.com/kalenikaliaksandr
Commit: 72f093ba9f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2758
Reviewed-by: https://github.com/gmta ✅
3 changed files with 17 additions and 3 deletions
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@ -199,8 +199,9 @@ void CanvasRenderingContext2D::did_draw(Gfx::FloatRect const&)
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Gfx::Painter* CanvasRenderingContext2D::painter()
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{
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if (!canvas_element().surface()) {
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allocate_painting_surface_if_needed();
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allocate_painting_surface_if_needed();
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auto surface = canvas_element().surface();
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if (!m_painter && surface) {
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canvas_element().document().invalidate_display_list();
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m_painter = make<Gfx::PainterSkia>(*canvas_element().surface());
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}
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@ -217,7 +218,7 @@ void CanvasRenderingContext2D::set_size(Gfx::IntSize const& size)
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void CanvasRenderingContext2D::allocate_painting_surface_if_needed()
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{
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if (m_surface)
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if (m_surface || m_size.is_empty())
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return;
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auto skia_backend_context = canvas_element().navigable()->traversable_navigable()->skia_backend_context();
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m_surface = Gfx::PaintingSurface::create_with_size(skia_backend_context, canvas_element().bitmap_size_for_canvas(), Gfx::BitmapFormat::BGRA8888, Gfx::AlphaType::Premultiplied);
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