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56a4cb0a3a2c7a44a2fd8ab3335adf915e19d30c
glfw/src/glx_context.c
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Camilla Löwy 56a4cb0a3a Add runtime platform selection 
This adds compile-time support for multiple platforms and runtime
detection of them.  Window system related platform functions are now
called from shared code via the function pointer struct _GLFWplatform.

The timer, thread and module loading platform functions are still called
directly by name and the implementation chosen at link-time.  These
functions are the same for any backend on a given OS, including the Null
backend.

The platforms are now enabled via CMake dependent options following the
GLFW_BUILD_<platform> pattern instead of a mix of automagic and ad-hoc
option names.  There is no longer any option for the Null backend as it
is now always enabled.

Much of the struct stitching work in platform.h was based on an earlier
experimental branch for runtime platform selection by @ronchaine.

Every platform function related to windows, contexts, monitors, input,
event processing and Vulkan have been renamed so that multiple sets of
them can exist without colliding.  Calls to these are now routed through
the _glfw.platform struct member.  These changes makes up most of this
commit.

For Wayland and X11 the client library loading and display creation is
used to detect a running compositor/server.  The XDG_SESSION_TYPE
environment variable is ignored for now, as X11 is still by far the more
complete implementation.

Closes #1655
Closes #1958
2021-10-13 21:47:11 +02:00

712 lines
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//========================================================================
// GLFW 3.4 GLX - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
// It is fine to use C99 in this file because it will not be built with VS
//========================================================================
#include "internal.h"
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#ifndef GLXBadProfileARB
#define GLXBadProfileARB 13
#endif
// Returns the specified attribute of the specified GLXFBConfig
//
static int getGLXFBConfigAttrib(GLXFBConfig fbconfig, int attrib)
{
int value;
glXGetFBConfigAttrib(_glfw.x11.display, fbconfig, attrib, &value);
return value;
}
// Return the GLXFBConfig most closely matching the specified hints
//
static GLFWbool chooseGLXFBConfig(const _GLFWfbconfig* desired,
GLXFBConfig* result)
{
GLXFBConfig* nativeConfigs;
_GLFWfbconfig* usableConfigs;
const _GLFWfbconfig* closest;
int i, nativeCount, usableCount;
const char* vendor;
GLFWbool trustWindowBit = GLFW_TRUE;
// HACK: This is a (hopefully temporary) workaround for Chromium
// (VirtualBox GL) not setting the window bit on any GLXFBConfigs
vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR);
if (vendor && strcmp(vendor, "Chromium") == 0)
trustWindowBit = GLFW_FALSE;
nativeConfigs =
glXGetFBConfigs(_glfw.x11.display, _glfw.x11.screen, &nativeCount);
if (!nativeConfigs || !nativeCount)
{
_glfwInputError(GLFW_API_UNAVAILABLE, "GLX: No GLXFBConfigs returned");
return GLFW_FALSE;
}
usableConfigs = _glfw_calloc(nativeCount, sizeof(_GLFWfbconfig));
usableCount = 0;
for (i = 0; i < nativeCount; i++)
{
const GLXFBConfig n = nativeConfigs[i];
_GLFWfbconfig* u = usableConfigs + usableCount;
// Only consider RGBA GLXFBConfigs
if (!(getGLXFBConfigAttrib(n, GLX_RENDER_TYPE) & GLX_RGBA_BIT))
continue;
// Only consider window GLXFBConfigs
if (!(getGLXFBConfigAttrib(n, GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
{
if (trustWindowBit)
continue;
}
if (getGLXFBConfigAttrib(n, GLX_DOUBLEBUFFER) != desired->doublebuffer)
continue;
if (desired->transparent)
{
XVisualInfo* vi = glXGetVisualFromFBConfig(_glfw.x11.display, n);
if (vi)
{
u->transparent = _glfwIsVisualTransparentX11(vi->visual);
XFree(vi);
}
}
u->redBits = getGLXFBConfigAttrib(n, GLX_RED_SIZE);
u->greenBits = getGLXFBConfigAttrib(n, GLX_GREEN_SIZE);
u->blueBits = getGLXFBConfigAttrib(n, GLX_BLUE_SIZE);
u->alphaBits = getGLXFBConfigAttrib(n, GLX_ALPHA_SIZE);
u->depthBits = getGLXFBConfigAttrib(n, GLX_DEPTH_SIZE);
u->stencilBits = getGLXFBConfigAttrib(n, GLX_STENCIL_SIZE);
u->accumRedBits = getGLXFBConfigAttrib(n, GLX_ACCUM_RED_SIZE);
u->accumGreenBits = getGLXFBConfigAttrib(n, GLX_ACCUM_GREEN_SIZE);
u->accumBlueBits = getGLXFBConfigAttrib(n, GLX_ACCUM_BLUE_SIZE);
u->accumAlphaBits = getGLXFBConfigAttrib(n, GLX_ACCUM_ALPHA_SIZE);
u->auxBuffers = getGLXFBConfigAttrib(n, GLX_AUX_BUFFERS);
if (getGLXFBConfigAttrib(n, GLX_STEREO))
u->stereo = GLFW_TRUE;
if (_glfw.glx.ARB_multisample)
u->samples = getGLXFBConfigAttrib(n, GLX_SAMPLES);
if (_glfw.glx.ARB_framebuffer_sRGB || _glfw.glx.EXT_framebuffer_sRGB)
u->sRGB = getGLXFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB);
u->handle = (uintptr_t) n;
usableCount++;
}
closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
if (closest)
*result = (GLXFBConfig) closest->handle;
XFree(nativeConfigs);
_glfw_free(usableConfigs);
return closest != NULL;
}
// Create the OpenGL context using legacy API
//
static GLXContext createLegacyContextGLX(_GLFWwindow* window,
GLXFBConfig fbconfig,
GLXContext share)
{
return glXCreateNewContext(_glfw.x11.display,
fbconfig,
GLX_RGBA_TYPE,
share,
True);
}
static void makeContextCurrentGLX(_GLFWwindow* window)
{
if (window)
{
if (!glXMakeCurrent(_glfw.x11.display,
window->context.glx.window,
window->context.glx.handle))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to make context current");
return;
}
}
else
{
if (!glXMakeCurrent(_glfw.x11.display, None, NULL))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to clear current context");
return;
}
}
_glfwPlatformSetTls(&_glfw.contextSlot, window);
}
static void swapBuffersGLX(_GLFWwindow* window)
{
glXSwapBuffers(_glfw.x11.display, window->context.glx.window);
}
static void swapIntervalGLX(int interval)
{
_GLFWwindow* window = _glfwPlatformGetTls(&_glfw.contextSlot);
if (_glfw.glx.EXT_swap_control)
{
_glfw.glx.SwapIntervalEXT(_glfw.x11.display,
window->context.glx.window,
interval);
}
else if (_glfw.glx.MESA_swap_control)
_glfw.glx.SwapIntervalMESA(interval);
else if (_glfw.glx.SGI_swap_control)
{
if (interval > 0)
_glfw.glx.SwapIntervalSGI(interval);
}
}
static int extensionSupportedGLX(const char* extension)
{
const char* extensions =
glXQueryExtensionsString(_glfw.x11.display, _glfw.x11.screen);
if (extensions)
{
if (_glfwStringInExtensionString(extension, extensions))
return GLFW_TRUE;
}
return GLFW_FALSE;
}
static GLFWglproc getProcAddressGLX(const char* procname)
{
if (_glfw.glx.GetProcAddress)
return _glfw.glx.GetProcAddress((const GLubyte*) procname);
else if (_glfw.glx.GetProcAddressARB)
return _glfw.glx.GetProcAddressARB((const GLubyte*) procname);
else
return _glfwPlatformGetModuleSymbol(_glfw.glx.handle, procname);
}
static void destroyContextGLX(_GLFWwindow* window)
{
if (window->context.glx.window)
{
glXDestroyWindow(_glfw.x11.display, window->context.glx.window);
window->context.glx.window = None;
}
if (window->context.glx.handle)
{
glXDestroyContext(_glfw.x11.display, window->context.glx.handle);
window->context.glx.handle = NULL;
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
// Initialize GLX
//
GLFWbool _glfwInitGLX(void)
{
int i;
const char* sonames[] =
{
#if defined(_GLFW_GLX_LIBRARY)
_GLFW_GLX_LIBRARY,
#elif defined(__CYGWIN__)
"libGL-1.so",
#else
"libGL.so.1",
"libGL.so",
#endif
NULL
};
if (_glfw.glx.handle)
return GLFW_TRUE;
for (i = 0; sonames[i]; i++)
{
_glfw.glx.handle = _glfwPlatformLoadModule(sonames[i]);
if (_glfw.glx.handle)
break;
}
if (!_glfw.glx.handle)
{
_glfwInputError(GLFW_API_UNAVAILABLE, "GLX: Failed to load GLX");
return GLFW_FALSE;
}
_glfw.glx.GetFBConfigs = (PFNGLXGETFBCONFIGSPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetFBConfigs");
_glfw.glx.GetFBConfigAttrib = (PFNGLXGETFBCONFIGATTRIBPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetFBConfigAttrib");
_glfw.glx.GetClientString = (PFNGLXGETCLIENTSTRINGPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetClientString");
_glfw.glx.QueryExtension = (PFNGLXQUERYEXTENSIONPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXQueryExtension");
_glfw.glx.QueryVersion = (PFNGLXQUERYVERSIONPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXQueryVersion");
_glfw.glx.DestroyContext = (PFNGLXDESTROYCONTEXTPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXDestroyContext");
_glfw.glx.MakeCurrent = (PFNGLXMAKECURRENTPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXMakeCurrent");
_glfw.glx.SwapBuffers = (PFNGLXSWAPBUFFERSPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXSwapBuffers");
_glfw.glx.QueryExtensionsString = (PFNGLXQUERYEXTENSIONSSTRINGPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXQueryExtensionsString");
_glfw.glx.CreateNewContext = (PFNGLXCREATENEWCONTEXTPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXCreateNewContext");
_glfw.glx.CreateWindow = (PFNGLXCREATEWINDOWPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXCreateWindow");
_glfw.glx.DestroyWindow = (PFNGLXDESTROYWINDOWPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXDestroyWindow");
_glfw.glx.GetProcAddress = (PFNGLXGETPROCADDRESSPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetProcAddress");
_glfw.glx.GetProcAddressARB = (PFNGLXGETPROCADDRESSPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetProcAddressARB");
_glfw.glx.GetVisualFromFBConfig = (PFNGLXGETVISUALFROMFBCONFIGPROC)
_glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetVisualFromFBConfig");
if (!_glfw.glx.GetFBConfigs ||
!_glfw.glx.GetFBConfigAttrib ||
!_glfw.glx.GetClientString ||
!_glfw.glx.QueryExtension ||
!_glfw.glx.QueryVersion ||
!_glfw.glx.DestroyContext ||
!_glfw.glx.MakeCurrent ||
!_glfw.glx.SwapBuffers ||
!_glfw.glx.QueryExtensionsString ||
!_glfw.glx.CreateNewContext ||
!_glfw.glx.CreateWindow ||
!_glfw.glx.DestroyWindow ||
!_glfw.glx.GetProcAddress ||
!_glfw.glx.GetProcAddressARB ||
!_glfw.glx.GetVisualFromFBConfig)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to load required entry points");
return GLFW_FALSE;
}
if (!glXQueryExtension(_glfw.x11.display,
&_glfw.glx.errorBase,
&_glfw.glx.eventBase))
{
_glfwInputError(GLFW_API_UNAVAILABLE, "GLX: GLX extension not found");
return GLFW_FALSE;
}
if (!glXQueryVersion(_glfw.x11.display, &_glfw.glx.major, &_glfw.glx.minor))
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: Failed to query GLX version");
return GLFW_FALSE;
}
if (_glfw.glx.major == 1 && _glfw.glx.minor < 3)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: GLX version 1.3 is required");
return GLFW_FALSE;
}
if (extensionSupportedGLX("GLX_EXT_swap_control"))
{
_glfw.glx.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)
getProcAddressGLX("glXSwapIntervalEXT");
if (_glfw.glx.SwapIntervalEXT)
_glfw.glx.EXT_swap_control = GLFW_TRUE;
}
if (extensionSupportedGLX("GLX_SGI_swap_control"))
{
_glfw.glx.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)
getProcAddressGLX("glXSwapIntervalSGI");
if (_glfw.glx.SwapIntervalSGI)
_glfw.glx.SGI_swap_control = GLFW_TRUE;
}
if (extensionSupportedGLX("GLX_MESA_swap_control"))
{
_glfw.glx.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)
getProcAddressGLX("glXSwapIntervalMESA");
if (_glfw.glx.SwapIntervalMESA)
_glfw.glx.MESA_swap_control = GLFW_TRUE;
}
if (extensionSupportedGLX("GLX_ARB_multisample"))
_glfw.glx.ARB_multisample = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_framebuffer_sRGB"))
_glfw.glx.ARB_framebuffer_sRGB = GLFW_TRUE;
if (extensionSupportedGLX("GLX_EXT_framebuffer_sRGB"))
_glfw.glx.EXT_framebuffer_sRGB = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_create_context"))
{
_glfw.glx.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
getProcAddressGLX("glXCreateContextAttribsARB");
if (_glfw.glx.CreateContextAttribsARB)
_glfw.glx.ARB_create_context = GLFW_TRUE;
}
if (extensionSupportedGLX("GLX_ARB_create_context_robustness"))
_glfw.glx.ARB_create_context_robustness = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_create_context_profile"))
_glfw.glx.ARB_create_context_profile = GLFW_TRUE;
if (extensionSupportedGLX("GLX_EXT_create_context_es2_profile"))
_glfw.glx.EXT_create_context_es2_profile = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_create_context_no_error"))
_glfw.glx.ARB_create_context_no_error = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_context_flush_control"))
_glfw.glx.ARB_context_flush_control = GLFW_TRUE;
return GLFW_TRUE;
}
// Terminate GLX
//
void _glfwTerminateGLX(void)
{
// NOTE: This function must not call any X11 functions, as it is called
// after XCloseDisplay (see _glfwTerminateX11 for details)
if (_glfw.glx.handle)
{
_glfwPlatformFreeModule(_glfw.glx.handle);
_glfw.glx.handle = NULL;
}
}
#define setAttrib(a, v) \
{ \
assert(((size_t) index + 1) < sizeof(attribs) / sizeof(attribs[0])); \
attribs[index++] = a; \
attribs[index++] = v; \
}
// Create the OpenGL or OpenGL ES context
//
GLFWbool _glfwCreateContextGLX(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
int attribs[40];
GLXFBConfig native = NULL;
GLXContext share = NULL;
if (ctxconfig->share)
share = ctxconfig->share->context.glx.handle;
if (!chooseGLXFBConfig(fbconfig, &native))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"GLX: Failed to find a suitable GLXFBConfig");
return GLFW_FALSE;
}
if (ctxconfig->client == GLFW_OPENGL_ES_API)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile ||
!_glfw.glx.EXT_create_context_es2_profile)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: OpenGL ES requested but GLX_EXT_create_context_es2_profile is unavailable");
return GLFW_FALSE;
}
}
if (ctxconfig->forward)
{
if (!_glfw.glx.ARB_create_context)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: Forward compatibility requested but GLX_ARB_create_context_profile is unavailable");
return GLFW_FALSE;
}
}
if (ctxconfig->profile)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: An OpenGL profile requested but GLX_ARB_create_context_profile is unavailable");
return GLFW_FALSE;
}
}
_glfwGrabErrorHandlerX11();
if (_glfw.glx.ARB_create_context)
{
int index = 0, mask = 0, flags = 0;
if (ctxconfig->client == GLFW_OPENGL_API)
{
if (ctxconfig->forward)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
}
else
mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
if (ctxconfig->debug)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
if (ctxconfig->robustness)
{
if (_glfw.glx.ARB_create_context_robustness)
{
if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
{
setAttrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
GLX_NO_RESET_NOTIFICATION_ARB);
}
else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
{
setAttrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
GLX_LOSE_CONTEXT_ON_RESET_ARB);
}
flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
}
}
if (ctxconfig->release)
{
if (_glfw.glx.ARB_context_flush_control)
{
if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
{
setAttrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB);
}
else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH)
{
setAttrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB);
}
}
}
if (ctxconfig->noerror)
{
if (_glfw.glx.ARB_create_context_no_error)
setAttrib(GLX_CONTEXT_OPENGL_NO_ERROR_ARB, GLFW_TRUE);
}
// NOTE: Only request an explicitly versioned context when necessary, as
// explicitly requesting version 1.0 does not always return the
// highest version supported by the driver
if (ctxconfig->major != 1 || ctxconfig->minor != 0)
{
setAttrib(GLX_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major);
setAttrib(GLX_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor);
}
if (mask)
setAttrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
if (flags)
setAttrib(GLX_CONTEXT_FLAGS_ARB, flags);
setAttrib(None, None);
window->context.glx.handle =
_glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
native,
share,
True,
attribs);
// HACK: This is a fallback for broken versions of the Mesa
// implementation of GLX_ARB_create_context_profile that fail
// default 1.0 context creation with a GLXBadProfileARB error in
// violation of the extension spec
if (!window->context.glx.handle)
{
if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
ctxconfig->client == GLFW_OPENGL_API &&
ctxconfig->profile == GLFW_OPENGL_ANY_PROFILE &&
ctxconfig->forward == GLFW_FALSE)
{
window->context.glx.handle =
createLegacyContextGLX(window, native, share);
}
}
}
else
{
window->context.glx.handle =
createLegacyContextGLX(window, native, share);
}
_glfwReleaseErrorHandlerX11();
if (!window->context.glx.handle)
{
_glfwInputErrorX11(GLFW_VERSION_UNAVAILABLE, "GLX: Failed to create context");
return GLFW_FALSE;
}
window->context.glx.window =
glXCreateWindow(_glfw.x11.display, native, window->x11.handle, NULL);
if (!window->context.glx.window)
{
_glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to create window");
return GLFW_FALSE;
}
window->context.makeCurrent = makeContextCurrentGLX;
window->context.swapBuffers = swapBuffersGLX;
window->context.swapInterval = swapIntervalGLX;
window->context.extensionSupported = extensionSupportedGLX;
window->context.getProcAddress = getProcAddressGLX;
window->context.destroy = destroyContextGLX;
return GLFW_TRUE;
}
#undef setAttrib
// Returns the Visual and depth of the chosen GLXFBConfig
//
GLFWbool _glfwChooseVisualGLX(const _GLFWwndconfig* wndconfig,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig,
Visual** visual, int* depth)
{
GLXFBConfig native;
XVisualInfo* result;
if (!chooseGLXFBConfig(fbconfig, &native))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"GLX: Failed to find a suitable GLXFBConfig");
return GLFW_FALSE;
}
result = glXGetVisualFromFBConfig(_glfw.x11.display, native);
if (!result)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to retrieve Visual for GLXFBConfig");
return GLFW_FALSE;
}
*visual = result->visual;
*depth = result->depth;
XFree(result);
return GLFW_TRUE;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* handle)
{
_GLFWwindow* window = (_GLFWwindow*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
if (_glfw.platform.platformID != GLFW_PLATFORM_X11)
{
_glfwInputError(GLFW_PLATFORM_UNAVAILABLE, "GLX: Platform not initialized");
return NULL;
}
if (window->context.client != GLFW_NATIVE_CONTEXT_API)
{
_glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
return NULL;
}
return window->context.glx.handle;
}
GLFWAPI GLXWindow glfwGetGLXWindow(GLFWwindow* handle)
{
_GLFWwindow* window = (_GLFWwindow*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(None);
if (_glfw.platform.platformID != GLFW_PLATFORM_X11)
{
_glfwInputError(GLFW_PLATFORM_UNAVAILABLE, "GLX: Platform not initialized");
return None;
}
if (window->context.client != GLFW_NATIVE_CONTEXT_API)
{
_glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
return None;
}
return window->context.glx.window;
}
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