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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/canvas/offscreencanvas/offscreen_canvas_module.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_canvas_context_creation_attributes_module.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_offscreen_rendering_context_type.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/offscreencanvas/offscreen_canvas.h"
#include "third_party/blink/renderer/modules/canvas/htmlcanvas/canvas_context_creation_attributes_helpers.h"
#include "third_party/blink/renderer/modules/canvas/offscreencanvas2d/offscreen_canvas_rendering_context_2d.h"
namespace blink {
V8OffscreenRenderingContext* OffscreenCanvasModule::getContext(
ScriptState* script_state,
OffscreenCanvas& offscreen_canvas,
const V8OffscreenRenderingContextType& context_type,
const CanvasContextCreationAttributesModule* attributes,
ExceptionState& exception_state) {
if (offscreen_canvas.IsNeutered()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
"OffscreenCanvas object is detached");
return nullptr;
}
CanvasContextCreationAttributesCore canvas_context_creation_attributes;
if (!ToCanvasContextCreationAttributes(
attributes, canvas_context_creation_attributes, exception_state)) {
return nullptr;
}
CanvasRenderingContext::CanvasRenderingAPI rendering_api;
switch (context_type.AsEnum()) {
case V8OffscreenRenderingContextType::Enum::k2D:
rendering_api = CanvasRenderingContext::CanvasRenderingAPI::k2D;
break;
case V8OffscreenRenderingContextType::Enum::kWebGL:
rendering_api = CanvasRenderingContext::CanvasRenderingAPI::kWebgl;
break;
case V8OffscreenRenderingContextType::Enum::kWebGL2:
rendering_api = CanvasRenderingContext::CanvasRenderingAPI::kWebgl2;
break;
case V8OffscreenRenderingContextType::Enum::kBitmaprenderer:
rendering_api =
CanvasRenderingContext::CanvasRenderingAPI::kBitmaprenderer;
break;
case V8OffscreenRenderingContextType::Enum::kWebGPU:
rendering_api = CanvasRenderingContext::CanvasRenderingAPI::kWebgpu;
break;
default:
NOTREACHED();
}
// OffscreenCanvas cannot be transferred after getContext, so this execution
// context will always be the right one from here on.
CanvasRenderingContext* context = offscreen_canvas.GetCanvasRenderingContext(
ExecutionContext::From(script_state), rendering_api,
canvas_context_creation_attributes);
if (!context)
return nullptr;
return context->AsV8OffscreenRenderingContext();
}
} // namespace blink
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