michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef WEBGLCONTEXTUTILS_H_
michael@0: #define WEBGLCONTEXTUTILS_H_
michael@0: 
michael@0: #include "WebGLContext.h"
michael@0: #include "mozilla/Assertions.h"
michael@0: #include "mozilla/dom/BindingUtils.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: bool IsGLDepthFormat(GLenum webGLFormat);
michael@0: bool IsGLDepthStencilFormat(GLenum webGLFormat);
michael@0: bool FormatHasAlpha(GLenum webGLFormat);
michael@0: void DriverFormatsFromFormatAndType(gl::GLContext* gl, GLenum webGLFormat, GLenum webGLType,
michael@0:                                     GLenum* out_driverInternalFormat, GLenum* out_driverFormat);
michael@0: GLenum DriverTypeFromType(gl::GLContext* gl, GLenum webGLType);
michael@0: 
michael@0: template <typename WebGLObjectType>
michael@0: JS::Value
michael@0: WebGLContext::WebGLObjectAsJSValue(JSContext *cx, const WebGLObjectType *object, ErrorResult& rv) const
michael@0: {
michael@0:     if (!object) {
michael@0:         return JS::NullValue();
michael@0:     }
michael@0:     MOZ_ASSERT(this == object->Context());
michael@0:     JS::Rooted<JS::Value> v(cx);
michael@0:     JS::Rooted<JSObject*> wrapper(cx, GetWrapper());
michael@0:     JSAutoCompartment ac(cx, wrapper);
michael@0:     if (!dom::WrapNewBindingObject(cx, const_cast<WebGLObjectType*>(object), &v)) {
michael@0:         rv.Throw(NS_ERROR_FAILURE);
michael@0:         return JS::NullValue();
michael@0:     }
michael@0:     return v;
michael@0: }
michael@0: 
michael@0: template <typename WebGLObjectType>
michael@0: JSObject*
michael@0: WebGLContext::WebGLObjectAsJSObject(JSContext *cx, const WebGLObjectType *object, ErrorResult& rv) const
michael@0: {
michael@0:     JS::Value v = WebGLObjectAsJSValue(cx, object, rv);
michael@0:     if (v.isNull()) {
michael@0:         return nullptr;
michael@0:     }
michael@0:     return &v.toObject();
michael@0: }
michael@0: 
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // WEBGLCONTEXTUTILS_H_