89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
//========================================================================
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// GLFW - An OpenGL framework
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// Platform: X11/GLX
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// API version: 3.0
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// WWW: http://www.glfw.org/
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include "internal.h"
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void (*glXGetProcAddress(const GLubyte *procName))();
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void (*glXGetProcAddressARB(const GLubyte *procName))();
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void (*glXGetProcAddressEXT(const GLubyte *procName))();
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// We support four different ways for getting addresses for GL/GLX
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// extension functions: glXGetProcAddress, glXGetProcAddressARB,
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// glXGetProcAddressEXT, and dlsym
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#if defined(_GLFW_HAS_GLXGETPROCADDRESSARB)
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#define _glfw_glXGetProcAddress(x) glXGetProcAddressARB(x)
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#elif defined(_GLFW_HAS_GLXGETPROCADDRESS)
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#define _glfw_glXGetProcAddress(x) glXGetProcAddress(x)
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#elif defined(_GLFW_HAS_GLXGETPROCADDRESSEXT)
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#define _glfw_glXGetProcAddress(x) glXGetProcAddressEXT(x)
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#elif defined(_GLFW_HAS_DLOPEN)
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#define _glfw_glXGetProcAddress(x) dlsym(_glfwLibs.libGL,x)
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#define _GLFW_DLOPEN_LIBGL
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#else
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#define _glfw_glXGetProcAddress(x) NULL
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#endif
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//************************************************************************
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//**** Platform implementation functions ****
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//************************************************************************
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//========================================================================
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// Check if an OpenGL extension is available at runtime
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//========================================================================
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int _glfwPlatformExtensionSupported(const char *extension)
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{
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const GLubyte *extensions;
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// Get list of GLX extensions
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extensions = (const GLubyte*) glXQueryExtensionsString(_glfwLibrary.display,
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_glfwWin.screen);
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if (extensions != NULL)
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{
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if (_glfwStringInExtensionString(extension, extensions))
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return GL_TRUE;
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}
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return GL_FALSE;
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}
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//========================================================================
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// Get the function pointer to an OpenGL function
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//========================================================================
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void * _glfwPlatformGetProcAddress(const char *procname)
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{
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return (void *) _glfw_glXGetProcAddress((const GLubyte *) procname);
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}
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