mirror of
https://github.com/gwm17/glfw.git
synced 2025-02-17 03:08:51 -05:00
d82f068f7e
The default behavior of WGL, EGL and GLX is to choose a config that has /at least/ the specified number of bits, whereas the GLFW 2 behavior was to choose the closest match with very few hard constraints. Moving the responsibility of finding the supported minimum values to the client was problematic, as there's no way to enumerate supported configurations, forcing the client to perform multiple (and slow) window/context creation attempts. Not even the currently set defaults (24-bit color and depth, 8-bit stencil) is universally supported, as bug reports show.
130 lines
4.8 KiB
C
130 lines
4.8 KiB
C
//========================================================================
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// GLFW - An OpenGL library
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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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#ifndef _glx_platform_h_
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#define _glx_platform_h_
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#define GLX_GLXEXT_LEGACY
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#include <GL/glx.h>
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// This path may need to be changed if you build GLFW using your own setup
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// We ship and use our own copy of glxext.h since GLFW uses fairly new
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// extensions and not all operating systems come with an up-to-date version
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#include "../deps/GL/glxext.h"
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// Do we have support for dlopen/dlsym?
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#if defined(_GLFW_HAS_DLOPEN)
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#include <dlfcn.h>
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#endif
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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(_glfw.glx.libGL, x)
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#define _GLFW_DLOPEN_LIBGL
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#else
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#error "No OpenGL entry point retrieval mechanism was enabled"
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#endif
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#define _GLFW_PLATFORM_FBCONFIG GLXFBConfig glx
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#define _GLFW_PLATFORM_CONTEXT_STATE _GLFWcontextGLX glx
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#define _GLFW_PLATFORM_LIBRARY_OPENGL_STATE _GLFWlibraryGLX glx
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#ifndef GLX_MESA_swap_control
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typedef int (*PFNGLXSWAPINTERVALMESAPROC)(int);
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#endif
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//========================================================================
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// GLFW platform specific types
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//========================================================================
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//------------------------------------------------------------------------
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// Platform-specific OpenGL context structure
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//------------------------------------------------------------------------
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typedef struct _GLFWcontextGLX
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{
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GLXContext context; // OpenGL rendering context
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XVisualInfo* visual; // Visual for selected GLXFBConfig
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} _GLFWcontextGLX;
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//------------------------------------------------------------------------
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// Platform-specific library global data for GLX
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//------------------------------------------------------------------------
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typedef struct _GLFWlibraryGLX
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{
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// Server-side GLX version
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int versionMajor, versionMinor;
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int eventBase;
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int errorBase;
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// TLS key for per-thread current context/window
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pthread_key_t current;
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// GLX error code received by Xlib error callback
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int errorCode;
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// GLX extensions
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PFNGLXSWAPINTERVALSGIPROC SwapIntervalSGI;
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PFNGLXSWAPINTERVALEXTPROC SwapIntervalEXT;
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PFNGLXSWAPINTERVALMESAPROC SwapIntervalMESA;
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PFNGLXGETFBCONFIGATTRIBSGIXPROC GetFBConfigAttribSGIX;
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PFNGLXCHOOSEFBCONFIGSGIXPROC ChooseFBConfigSGIX;
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PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC CreateContextWithConfigSGIX;
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PFNGLXGETVISUALFROMFBCONFIGSGIXPROC GetVisualFromFBConfigSGIX;
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PFNGLXCREATECONTEXTATTRIBSARBPROC CreateContextAttribsARB;
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GLboolean SGIX_fbconfig;
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GLboolean SGI_swap_control;
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GLboolean EXT_swap_control;
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GLboolean MESA_swap_control;
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GLboolean ARB_multisample;
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GLboolean ARB_framebuffer_sRGB;
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GLboolean ARB_create_context;
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GLboolean ARB_create_context_profile;
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GLboolean ARB_create_context_robustness;
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GLboolean EXT_create_context_es2_profile;
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#if defined(_GLFW_DLOPEN_LIBGL)
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void* libGL; // dlopen handle for libGL.so
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#endif
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} _GLFWlibraryGLX;
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#endif // _glx_platform_h_
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