/* * 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. */ #pragma once #if ENABLE(WEBGL) #include "WebGLRenderingContextBase.h" #include <wtf/RefCounted.h> namespace WebCore { class WebGLExtension : public RefCounted<WebGLExtension> { WTF_MAKE_ISO_ALLOCATED(WebGLExtension); public: // Extension names are needed to properly wrap instances in JavaScript objects. enum ExtensionName { WebGLLoseContextName, EXTBlendMinMaxName, EXTFragDepthName, EXTShaderTextureLODName, EXTTextureCompressionRGTCName, EXTTextureFilterAnisotropicName, EXTsRGBName, KHRParallelShaderCompileName, OESTextureFloatName, OESTextureFloatLinearName, OESTextureHalfFloatName, OESTextureHalfFloatLinearName, OESStandardDerivativesName, OESVertexArrayObjectName, WebGLDebugRendererInfoName, WebGLDebugShadersName, WebGLCompressedTextureS3TCName, WebGLCompressedTextureS3TCsRGBName, WebGLDepthTextureName, WebGLDrawBuffersName, OESElementIndexUintName, OESFBORenderMipmapName, WebGLCompressedTextureATCName, WebGLCompressedTextureETCName, WebGLCompressedTextureETC1Name, WebGLCompressedTexturePVRTCName, WebGLCompressedTextureASTCName, ANGLEInstancedArraysName, EXTColorBufferHalfFloatName, EXTFloatBlendName, WebGLColorBufferFloatName, EXTColorBufferFloatName, }; WebGLRenderingContextBase* context() { return m_context; } virtual ~WebGLExtension(); virtual ExtensionName getName() const = 0; // Lose the parent WebGL context. The context loss mode changes // the behavior specifically of WEBGL_lose_context, which does not // lose its connection to its parent context when it forces a // context loss. However, all extensions must be lost when // destroying their WebGLRenderingContextBase. virtual void loseParentContext(WebGLRenderingContextBase::LostContextMode); bool isLost() { return !m_context; } protected: WebGLExtension(WebGLRenderingContextBase&); WebGLRenderingContextBase* m_context; }; } // namespace WebCore #endif