a80babffb6
Canvas rendering is a major remaining path where WebContent directly owns GPU-facing drawing state. Back 2D and WebGL canvas contexts with remote Compositor transports, so WebContent talks to canvas surfaces through IPC while the Compositor owns the rasterization resources. This is a large step toward GPU sandboxing because canvas GPU work now lives behind the Compositor boundary. It also gives OffscreenCanvas the process-independent canvas plumbing that HTMLCanvasElement now uses, making worker-owned canvases possible without another WebContent-local rendering path.
116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
/*
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* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
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* Copyright (c) 2024, Andrew Kaster <andrew@ladybird.org>
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* Copyright (c) 2023, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/ArrayBuffer.h>
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#include <LibJS/Runtime/TypedArray.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/WebGL2RenderingContext.h>
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#include <LibWeb/HTML/HTMLCanvasElement.h>
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#include <LibWeb/Infra/Strings.h>
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#include <LibWeb/Painting/Paintable.h>
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#include <LibWeb/WebGL/EventNames.h>
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#include <LibWeb/WebGL/WebGL2RenderingContext.h>
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#include <LibWeb/WebGL/WebGLContextEvent.h>
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#include <LibWeb/WebGL/WebGLContextProxy.h>
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#include <LibWeb/WebGL/WebGLRenderingContext.h>
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#include <LibWeb/WebGL/WebGLShader.h>
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#include <LibWeb/WebIDL/Buffers.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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namespace Web::WebGL {
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GC_DEFINE_ALLOCATOR(WebGL2RenderingContext);
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JS::ThrowCompletionOr<GC::Ptr<WebGL2RenderingContext>> WebGL2RenderingContext::create(JS::Realm& realm, HTML::HTMLCanvasElement& canvas_element, JS::Value options)
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{
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// We should be coming here from getContext being called on a wrapped <canvas> element.
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auto context_attributes = TRY(convert_value_to_context_attributes_dictionary(canvas_element.vm(), options));
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auto context = create_webgl_context_proxy(canvas_element, WebGLVersion::WebGL2, context_attributes);
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if (!context) {
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fire_webgl_context_creation_error(canvas_element);
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return GC::Ptr<WebGL2RenderingContext> { nullptr };
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}
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return realm.create<WebGL2RenderingContext>(realm, canvas_element, context.release_nonnull(), context_attributes, context_attributes);
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}
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WebGL2RenderingContext::WebGL2RenderingContext(JS::Realm& realm, HTML::HTMLCanvasElement& canvas_element, NonnullOwnPtr<WebGLContextProxy> context, WebGLContextAttributes context_creation_parameters, WebGLContextAttributes actual_context_parameters)
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: WebGL2RenderingContextOverloads(realm, move(context))
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, m_canvas_element(canvas_element)
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, m_context_creation_parameters(context_creation_parameters)
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, m_actual_context_parameters(actual_context_parameters)
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{
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}
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WebGL2RenderingContext::~WebGL2RenderingContext() = default;
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void WebGL2RenderingContext::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(WebGL2RenderingContext);
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Base::initialize(realm);
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}
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void WebGL2RenderingContext::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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WebGL2RenderingContextImpl::visit_edges(visitor);
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visitor.visit(m_canvas_element);
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}
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void WebGL2RenderingContext::prepare_for_compositing()
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{
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context().present_canvas_for_compositing(m_context_creation_parameters.preserve_drawing_buffer);
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}
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GC::Ref<HTML::HTMLCanvasElement> WebGL2RenderingContext::canvas_for_binding() const
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{
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return *m_canvas_element;
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}
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void WebGL2RenderingContext::did_update_canvas_content()
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{
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m_canvas_element->set_canvas_content_dirty();
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m_canvas_element->set_needs_repaint();
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}
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Optional<WebGLContextAttributes> WebGL2RenderingContext::get_context_attributes()
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{
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if (is_context_lost())
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return {};
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return m_actual_context_parameters;
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}
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void WebGL2RenderingContext::set_size(Gfx::IntSize const& size)
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{
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Gfx::IntSize final_size;
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final_size.set_width(clamp(size.width(), 1, max_webgl_drawing_buffer_dimension));
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final_size.set_height(clamp(size.height(), 1, max_webgl_drawing_buffer_dimension));
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context().set_size(final_size);
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}
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void WebGL2RenderingContext::reset_to_default_state()
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{
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}
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WebIDL::Long WebGL2RenderingContext::drawing_buffer_width() const
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{
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auto size = canvas_for_binding()->bitmap_size_for_canvas();
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return min(size.width(), max_webgl_drawing_buffer_dimension);
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}
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WebIDL::Long WebGL2RenderingContext::drawing_buffer_height() const
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{
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auto size = canvas_for_binding()->bitmap_size_for_canvas();
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return min(size.height(), max_webgl_drawing_buffer_dimension);
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}
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}
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