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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WebGLExtension_h
#define WebGLExtension_h
#include "core/html/canvas/WebGLRenderingContext.h"
#include "wtf/RefCounted.h"
namespace WebCore {
class WebGLExtension : public RefCounted<WebGLExtension> {
WTF_MAKE_FAST_ALLOCATED;
public:
// Extension names are needed to properly wrap instances in JavaScript objects.
enum ExtensionName {
ANGLEInstancedArraysName,
EXTFragDepthName,
EXTTextureFilterAnisotropicName,
OESElementIndexUintName,
OESStandardDerivativesName,
OESTextureFloatLinearName,
OESTextureFloatName,
OESTextureHalfFloatLinearName,
OESTextureHalfFloatName,
OESVertexArrayObjectName,
WebGLCompressedTextureATCName,
WebGLCompressedTexturePVRTCName,
WebGLCompressedTextureS3TCName,
WebGLDebugRendererInfoName,
WebGLDebugShadersName,
WebGLDepthTextureName,
WebGLDrawBuffersName,
WebGLLoseContextName,
};
WebGLRenderingContext* context() { return m_context; }
virtual ~WebGLExtension();
virtual ExtensionName name() const = 0;
// Lose this extension. Passing true = force loss. Some extensions
// like WEBGL_lose_context are not normally lost when the context
// is lost but must be lost when destroying their WebGLRenderingContext.
virtual void lose(bool)
{
m_context = 0;
}
bool isLost()
{
return !m_context;
}
protected:
WebGLExtension(WebGLRenderingContext*);
WebGLRenderingContext* m_context;
};
} // namespace WebCore
#endif // WebGLExtension_h
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