2692db8699
Note that as of this commit, there aren't any such throwers, and the call site in Heap::allocate will drop exceptions on the floor. This commit only serves to change the declaration of the overrides, make sure they return an empty value, and to propagate OOM errors frm their base initialize invocations.
67 lines
3.2 KiB
C++
67 lines
3.2 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/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, DeprecatedFlyString 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, "webglcontextcreationerror"sv);
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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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auto context_or_error = GL::create_context(*canvas_element.bitmap());
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if (context_or_error.is_error()) {
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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_or_error.release_value(), context_attributes, context_attributes);
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}
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WebGLRenderingContext::WebGLRenderingContext(JS::Realm& realm, HTML::HTMLCanvasElement& canvas_element, NonnullOwnPtr<GL::GLContext> 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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JS::ThrowCompletionOr<void> WebGLRenderingContext::initialize(JS::Realm& realm)
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{
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MUST_OR_THROW_OOM(Base::initialize(realm));
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set_prototype(&Bindings::ensure_web_prototype<Bindings::WebGLRenderingContextPrototype>(realm, "WebGLRenderingContext"));
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return {};
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}
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}
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