mirror of
https://github.com/RGBCube/serenity
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271c9d1ae9
This change makes WebGL to use LibGL only in SerenityOS, and the platform's OpenGL driver in Ladybird if it is available. This is implemented by introducing wrapper class between WebGL and OpenGL calls. This way it will also be possible to provide more complete support in Ladybird even if we don't yet have all needed calls implemented in LibGL. For now, the wrapper class makes all GL calls virtual. However, we can get rid of this and implement it at compile time in case of performance problems.
71 lines
3.3 KiB
C++
71 lines
3.3 KiB
C++
/*
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* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/HTML/HTMLCanvasElement.h>
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#include <LibWeb/WebGL/EventNames.h>
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#include <LibWeb/WebGL/WebGLContextEvent.h>
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#include <LibWeb/WebGL/WebGLRenderingContext.h>
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namespace Web::WebGL {
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JS_DEFINE_ALLOCATOR(WebGLRenderingContext);
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#fire-a-webgl-context-event
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static void fire_webgl_context_event(HTML::HTMLCanvasElement& canvas_element, FlyString const& type)
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{
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// To fire a WebGL context event named e means that an event using the WebGLContextEvent interface, with its type attribute [DOM4] initialized to e, its cancelable attribute initialized to true, and its isTrusted attribute [DOM4] initialized to true, is to be dispatched at the given object.
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// FIXME: Consider setting a status message.
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auto event = WebGLContextEvent::create(canvas_element.realm(), type, WebGLContextEventInit {});
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event->set_is_trusted(true);
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event->set_cancelable(true);
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canvas_element.dispatch_event(*event);
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#fire-a-webgl-context-creation-error
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static void fire_webgl_context_creation_error(HTML::HTMLCanvasElement& canvas_element)
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{
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// 1. Fire a WebGL context event named "webglcontextcreationerror" at canvas, optionally with its statusMessage attribute set to a platform dependent string about the nature of the failure.
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fire_webgl_context_event(canvas_element, EventNames::webglcontextcreationerror);
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}
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JS::ThrowCompletionOr<JS::GCPtr<WebGLRenderingContext>> WebGLRenderingContext::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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bool created_bitmap = canvas_element.create_bitmap(/* minimum_width= */ 1, /* minimum_height= */ 1);
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if (!created_bitmap) {
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fire_webgl_context_creation_error(canvas_element);
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return JS::GCPtr<WebGLRenderingContext> { nullptr };
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}
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VERIFY(canvas_element.bitmap());
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auto context = OpenGLContext::create(*canvas_element.bitmap());
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if (!context) {
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fire_webgl_context_creation_error(canvas_element);
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return JS::GCPtr<WebGLRenderingContext> { nullptr };
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}
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return realm.heap().allocate<WebGLRenderingContext>(realm, realm, canvas_element, context.release_nonnull(), context_attributes, context_attributes);
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}
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WebGLRenderingContext::WebGLRenderingContext(JS::Realm& realm, HTML::HTMLCanvasElement& canvas_element, NonnullOwnPtr<OpenGLContext> context, WebGLContextAttributes context_creation_parameters, WebGLContextAttributes actual_context_parameters)
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: WebGLRenderingContextBase(realm, canvas_element, move(context), move(context_creation_parameters), move(actual_context_parameters))
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{
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}
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WebGLRenderingContext::~WebGLRenderingContext() = default;
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void WebGLRenderingContext::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::WebGLRenderingContextPrototype>(realm, "WebGLRenderingContext"_fly_string));
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}
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}
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