1/* 2 * Copyright (C) 2012 Intel Corporation. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef GLPlatformContext_h 27#define GLPlatformContext_h 28 29#include "GLDefs.h" 30#include "GLPlatformSurface.h" 31#include "GraphicsContext3D.h" 32#include <wtf/Noncopyable.h> 33 34// Encapsulates an OpenGL context, hiding platform specific management. 35namespace WebCore { 36 37class GLPlatformContext { 38 WTF_MAKE_NONCOPYABLE(GLPlatformContext); 39 40public: 41 // From http://www.khronos.org/registry/gles/extensions/EXT/EXT_robustness.txt 42 enum PlatformContextReset { 43 PLATFORMCONTEXT_NO_ERROR = 0x0000, 44 PLATFORMCONTEXT_GUILTY_CONTEXT_RESET = 0x8253, 45 PLATFORMCONTEXT_INNOCENT_CONTEXT_RESET = 0x8254, 46 PLATFORMCONTEXT_UNKNOWN_CONTEXT_RESET = 0x8255, 47 }; 48 49 static std::unique_ptr<GLPlatformContext> createContext(GraphicsContext3D::RenderStyle); 50 51 static bool supportsGLExtension(const String&); 52 53#if USE(EGL) 54 static bool supportsEGLExtension(EGLDisplay, const String&); 55#endif 56 57#if USE(GLX) 58 static bool supportsGLXExtension(Display*, const String&); 59#endif 60 61 virtual ~GLPlatformContext(); 62 63 virtual bool initialize(GLPlatformSurface*, PlatformContext = 0); 64 65 // Makes this and surface as current context and drawable. 66 // Calling this function with no surface is same as calling releaseCurrent. 67 // Does nothing if this is already current Context. 68 bool makeCurrent(GLPlatformSurface* = 0); 69 70 // Sets Current Context and Drawable as Null. 71 // Doesn't have any effect if this is not the current Context. 72 void releaseCurrent(); 73 74 virtual PlatformContext handle() const; 75 76 virtual bool isCurrentContext() const; 77 78 bool isValid() const; 79 80 // Destroys any GL resources associated with this context. 81 virtual void destroy(); 82 83 static GLPlatformContext* getCurrent(); 84 85protected: 86 GLPlatformContext(); 87 virtual bool platformMakeCurrent(GLPlatformSurface*); 88 virtual void platformReleaseCurrent(); 89 PlatformContext m_contextHandle; 90 bool m_resetLostContext; 91 bool m_contextLost; 92}; 93 94} // namespace WebCore 95 96#endif // GLNativeContext_H 97