6f433c8656
This is a monster patch that turns all EventTargets into GC-allocated PlatformObjects. Their C++ wrapper classes are removed, and the LibJS garbage collector is now responsible for their lifetimes. There's a fair amount of hacks and band-aids in this patch, and we'll have a lot of cleanup to do after this.
57 lines
2.7 KiB
C++
57 lines
2.7 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/Wrapper.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/WebGLContextEvent.h>
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#include <LibWeb/WebGL/WebGLRenderingContext.h>
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namespace Web::WebGL {
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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.document().window(), 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, "webglcontextcreationerror"sv);
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}
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JS::ThrowCompletionOr<RefPtr<WebGLRenderingContext>> WebGLRenderingContext::create(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 RefPtr<WebGLRenderingContext> { nullptr };
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}
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#ifndef __serenity__
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// FIXME: Make WebGL work on other platforms.
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(void)context_attributes;
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dbgln("FIXME: WebGL not supported on the current platform");
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fire_webgl_context_creation_error(canvas_element);
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return RefPtr<WebGLRenderingContext> { nullptr };
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#else
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// FIXME: LibGL currently doesn't propagate context creation errors.
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auto context = GL::create_context(*canvas_element.bitmap());
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return adopt_ref(*new WebGLRenderingContext(canvas_element, move(context), context_attributes, context_attributes));
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#endif
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}
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}
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