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LibWeb: Implement GLES2 context creation

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For now only macOS is supported.

IOSurface is used as a backing store because it will allow us to read
it from Skia and write to it from OpenGL without any extra copying:
- ANGLE_metal_texture_client_buffer extension is used to create
  EGLSurface from IOSurface.
- Then the same IOSurface is wrapped into Metal texture and passed to
  Skia allowing to share the same memory between Skia Metal backend and
  ANGLE.
This commit is contained in:
Aliaksandr Kalenik 2024-11-29 22:15:02 +01:00 • committed by Alexander Kalenik
commit 38488b9ef3
Notes: github-actions[bot] 2024-12-03 22:37:28 +00:00
5 changed files with 223 additions and 19 deletions
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16
Libraries/LibWeb/WebGL/WebGLRenderingContext.cpp
View file

@ -57,13 +57,16 @@ JS::ThrowCompletionOr<GC::Ptr<WebGLRenderingContext>> WebGLRenderingContext::cre
// We should be coming here from getContext being called on a wrapped <canvas> element.
auto context_attributes = TRY(convert_value_to_context_attributes_dictionary(canvas_element.vm(), options));
auto context = OpenGLContext::create();
auto skia_backend_context = canvas_element.navigable()->traversable_navigable()->skia_backend_context();
auto context = OpenGLContext::create(*skia_backend_context);
if (!context) {
fire_webgl_context_creation_error(canvas_element);
return GC::Ptr<WebGLRenderingContext> { nullptr };
}
context->set_size(canvas_element.bitmap_size_for_canvas(1, 1));
return realm.create<WebGLRenderingContext>(realm, canvas_element, context.release_nonnull(), context_attributes, context_attributes);
}
@ -137,9 +140,9 @@ bool WebGLRenderingContext::is_context_lost() const
return m_context_lost;
}
void WebGLRenderingContext::set_size(Gfx::IntSize const&)
void WebGLRenderingContext::set_size(Gfx::IntSize const& size)
{
TODO();
m_context->set_size(size);
}
void WebGLRenderingContext::reset_to_default_state()
@ -148,7 +151,12 @@ void WebGLRenderingContext::reset_to_default_state()
RefPtr<Gfx::PaintingSurface> WebGLRenderingContext::surface()
{
TODO();
return m_context->surface();
}
void WebGLRenderingContext::allocate_painting_surface_if_needed()
{
m_context->allocate_painting_surface_if_needed();
}
Optional<Vector<String>> WebGLRenderingContext::get_supported_extensions() const