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LibWeb: Null-check surface before allocating painter for context2d

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Fixes https://github.com/LadybirdBrowser/ladybird/issues/2755
This commit is contained in:
Aliaksandr Kalenik 2024-12-04 16:22:27 +01:00 • committed by Alexander Kalenik
commit 72f093ba9f
Notes: github-actions[bot] 2024-12-04 15:59:49 +00:00
3 changed files with 17 additions and 3 deletions
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7
Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
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@ -199,8 +199,9 @@ void CanvasRenderingContext2D::did_draw(Gfx::FloatRect const&)
Gfx::Painter* CanvasRenderingContext2D::painter()
{
if (!canvas_element().surface()) {
allocate_painting_surface_if_needed();
allocate_painting_surface_if_needed();
auto surface = canvas_element().surface();
if (!m_painter && surface) {
canvas_element().document().invalidate_display_list();
m_painter = make<Gfx::PainterSkia>(*canvas_element().surface());
}
@ -217,7 +218,7 @@ void CanvasRenderingContext2D::set_size(Gfx::IntSize const& size)
void CanvasRenderingContext2D::allocate_painting_surface_if_needed()
{
if (m_surface)
if (m_surface || m_size.is_empty())
return;
auto skia_backend_context = canvas_element().navigable()->traversable_navigable()->skia_backend_context();
m_surface = Gfx::PaintingSurface::create_with_size(skia_backend_context, canvas_element().bitmap_size_for_canvas(), Gfx::BitmapFormat::BGRA8888, Gfx::AlphaType::Premultiplied);