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/* GdkGLExt - OpenGL Extension to GDK
* Copyright (C) 2002-2004 Naofumi Yasufuku
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <string.h>
#ifdef __APPLE__
#include <mach-o/dyld.h>
#else /* __APPLE__ */
#include <gmodule.h>
#endif /* __APPLE__ */
#include <gdk/gdk.h>
#include "gdkglx.h"
#include "gdkglprivate-x11.h"
#include "gdkglconfig-x11.h"
#include "gdkglquery.h"
#include "gdkglquery-x11.h"
gboolean
_gdk_x11_gl_query_extension_for_display (GdkDisplay *display)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
return glXQueryExtension (GDK_DISPLAY_XDISPLAY (display),
NULL, NULL);
}
gboolean
_gdk_x11_gl_query_version_for_display (GdkDisplay *display,
int *major,
int *minor)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
return glXQueryVersion (GDK_DISPLAY_XDISPLAY (display),
major, minor);
}
/*
* This code is based on __glutIsSupportedByGLX().
*/
/**
* gdk_x11_gl_query_glx_extension:
* @glconfig: a #GdkGLConfig.
* @extension: name of GLX extension.
*
* Determines whether a given GLX extension is supported.
*
* Return value: TRUE if the GLX extension is supported, FALSE if not
* supported.
**/
gboolean
gdk_x11_gl_query_glx_extension (GdkGLConfig *glconfig,
const char *extension)
{
static const char *extensions = NULL;
const char *start;
char *where, *terminator;
int major, minor;
g_return_val_if_fail (GDK_IS_X11_GL_CONFIG (glconfig), FALSE);
/* Extension names should not have spaces. */
where = strchr (extension, ' ');
if (where || *extension == '\0')
return FALSE;
if (extensions == NULL)
{
/* Be careful not to call glXQueryExtensionsString if it
looks like the server doesn't support GLX 1.1.
Unfortunately, the original GLX 1.0 didn't have the notion
of GLX extensions. */
glXQueryVersion (GDK_GL_CONFIG_XDISPLAY (glconfig),
&major, &minor);
if ((major == 1 && minor < 1) || (major < 1))
return FALSE;
extensions = glXQueryExtensionsString (GDK_GL_CONFIG_XDISPLAY (glconfig),
GDK_GL_CONFIG_SCREEN_XNUMBER (glconfig));
}
/* It takes a bit of care to be fool-proof about parsing
the GLX extensions string. Don't be fooled by
sub-strings, etc. */
start = extensions;
for (;;)
{
where = strstr (start, extension);
if (where == NULL)
break;
terminator = where + strlen (extension);
if (where == start || *(where - 1) == ' ')
if (*terminator == ' ' || *terminator == '\0')
{
GDK_GL_NOTE (MISC, g_message (" - %s - supported", extension));
return TRUE;
}
start = terminator;
}
GDK_GL_NOTE (MISC, g_message (" - %s - not supported", extension));
return FALSE;
}
GdkGLProc
_gdk_x11_gl_get_proc_address (const char *proc_name)
{
#ifdef __APPLE__
#define _GDK_GL_LIBGL_PATH "/usr/X11R6/lib/libGL.1.dylib"
#define _GDK_GL_LIBGLU_PATH "/usr/X11R6/lib/libGLU.1.dylib"
typedef GdkGLProc (*__glXGetProcAddressProc) (const GLubyte *);
static __glXGetProcAddressProc glx_get_proc_address = (__glXGetProcAddressProc) -1;
const char *image_name;
static const struct mach_header *libgl_image = NULL;
static const struct mach_header *libglu_image = NULL;
NSSymbol symbol;
char *symbol_name;
GdkGLProc proc_address;
GDK_GL_NOTE_FUNC ();
if (strncmp ("glu", proc_name, 3) != 0)
{
/* libGL */
if (libgl_image == NULL)
{
image_name = g_getenv ("GDK_GL_LIBGL_PATH");
if (image_name == NULL)
image_name = _GDK_GL_LIBGL_PATH;
GDK_GL_NOTE (MISC, g_message (" - Add Mach-O image %s", image_name));
libgl_image = NSAddImage (image_name, NSADDIMAGE_OPTION_RETURN_ON_ERROR);
if (libgl_image == NULL)
{
g_warning ("Cannot add Mach-O image %s", image_name);
return NULL;
}
}
if (glx_get_proc_address == (__glXGetProcAddressProc) -1)
{
/*
* Look up glXGetProcAddress () function.
*/
symbol = NSLookupSymbolInImage (libgl_image,
"_glXGetProcAddress",
NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
if (symbol == NULL)
{
symbol = NSLookupSymbolInImage (libgl_image,
"_glXGetProcAddressARB",
NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
if (symbol == NULL)
{
symbol = NSLookupSymbolInImage (libgl_image,
"_glXGetProcAddressEXT",
NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
}
}
GDK_GL_NOTE (MISC, g_message (" - glXGetProcAddress () - %s",
symbol ? "supported" : "not supported"));
if (symbol != NULL)
glx_get_proc_address = NSAddressOfSymbol (symbol);
else
glx_get_proc_address = NULL;
}
/* Try glXGetProcAddress () */
if (glx_get_proc_address != NULL)
{
proc_address = glx_get_proc_address ((unsigned char *) proc_name);
GDK_GL_NOTE (IMPL, g_message (" ** glXGetProcAddress () - %s",
proc_address ? "succeeded" : "failed"));
if (proc_address != NULL)
return proc_address;
}
/* Try Mach-O dyld */
symbol_name = g_strconcat ("_", proc_name, NULL);
symbol = NSLookupSymbolInImage (libgl_image,
symbol_name,
NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
GDK_GL_NOTE (MISC, g_message (" - NSLookupSymbolInImage () - %s",
symbol ? "succeeded" : "failed"));
g_free (symbol_name);
if (symbol != NULL)
return NSAddressOfSymbol (symbol);
}
else
{
/* libGLU */
if (libglu_image == NULL)
{
image_name = g_getenv ("GDK_GL_LIBGLU_PATH");
if (image_name == NULL)
image_name = _GDK_GL_LIBGLU_PATH;
GDK_GL_NOTE (MISC, g_message (" - Add Mach-O image %s", image_name));
libglu_image = NSAddImage (image_name, NSADDIMAGE_OPTION_RETURN_ON_ERROR);
if (libglu_image == NULL)
{
g_warning ("Cannot add Mach-O image %s", image_name);
return NULL;
}
}
symbol_name = g_strconcat ("_", proc_name, NULL);
symbol = NSLookupSymbolInImage (libglu_image,
symbol_name,
NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
GDK_GL_NOTE (MISC, g_message (" - NSLookupSymbolInImage () - %s",
symbol ? "succeeded" : "failed"));
g_free (symbol_name);
if (symbol != NULL)
return NSAddressOfSymbol (symbol);
}
return NULL;
#else /* __APPLE__ */
typedef GdkGLProc (*__glXGetProcAddressProc) (const GLubyte *);
static __glXGetProcAddressProc glx_get_proc_address = (__glXGetProcAddressProc) -1;
gchar *file_name;
GModule *module;
GdkGLProc proc_address = NULL;
GDK_GL_NOTE_FUNC ();
if (strncmp ("glu", proc_name, 3) != 0)
{
if (glx_get_proc_address == (__glXGetProcAddressProc) -1)
{
/*
* Look up glXGetProcAddress () function.
*/
file_name = g_module_build_path (NULL, "GL");
GDK_GL_NOTE (MISC, g_message (" - Open %s", file_name));
module = g_module_open (file_name, G_MODULE_BIND_LAZY);
g_free (file_name);
if (module != NULL)
{
g_module_symbol (module, "glXGetProcAddress",
(gpointer) &glx_get_proc_address);
if (glx_get_proc_address == NULL)
{
g_module_symbol (module, "glXGetProcAddressARB",
(gpointer) &glx_get_proc_address);
if (glx_get_proc_address == NULL)
{
g_module_symbol (module, "glXGetProcAddressEXT",
(gpointer) &glx_get_proc_address);
}
}
GDK_GL_NOTE (MISC, g_message (" - glXGetProcAddress () - %s",
glx_get_proc_address ? "supported" : "not supported"));
g_module_close (module);
}
else
{
g_warning ("Cannot open %s", file_name);
glx_get_proc_address = NULL;
return NULL;
}
}
/* Try glXGetProcAddress () */
if (glx_get_proc_address != NULL)
{
proc_address = glx_get_proc_address ((unsigned char *) proc_name);
GDK_GL_NOTE (IMPL, g_message (" ** glXGetProcAddress () - %s",
proc_address ? "succeeded" : "failed"));
if (proc_address != NULL)
return proc_address;
}
/* Try g_module_symbol () */
/* libGL */
file_name = g_module_build_path (NULL, "GL");
GDK_GL_NOTE (MISC, g_message (" - Open %s", file_name));
module = g_module_open (file_name, G_MODULE_BIND_LAZY);
g_free (file_name);
if (module != NULL)
{
g_module_symbol (module, proc_name, (gpointer) &proc_address);
GDK_GL_NOTE (MISC, g_message (" - g_module_symbol () - %s",
proc_address ? "succeeded" : "failed"));
g_module_close (module);
}
else
{
g_warning ("Cannot open %s", file_name);
}
if (proc_address == NULL)
{
/* libGLcore */
file_name = g_module_build_path (NULL, "GLcore");
GDK_GL_NOTE (MISC, g_message (" - Open %s", file_name));
module = g_module_open (file_name, G_MODULE_BIND_LAZY);
g_free (file_name);
if (module != NULL)
{
g_module_symbol (module, proc_name, (gpointer) &proc_address);
GDK_GL_NOTE (MISC, g_message (" - g_module_symbol () - %s",
proc_address ? "succeeded" : "failed"));
g_module_close (module);
}
}
}
else
{
/* libGLU */
file_name = g_module_build_path (NULL, "GLU");
GDK_GL_NOTE (MISC, g_message (" - Open %s", file_name));
module = g_module_open (file_name, G_MODULE_BIND_LAZY);
g_free (file_name);
if (module != NULL)
{
g_module_symbol (module, proc_name, (gpointer) &proc_address);
GDK_GL_NOTE (MISC, g_message (" - g_module_symbol () - %s",
proc_address ? "succeeded" : "failed"));
g_module_close (module);
}
else
{
g_warning ("Cannot open %s", file_name);
}
}
return proc_address;
#endif /* __APPLE__ */
}
/*< private >*/
void
_gdk_x11_gl_print_glx_info (Display *xdisplay,
int screen_num)
{
static gboolean done = FALSE;
if (!done)
{
g_message (" -- Server GLX_VENDOR : %s",
glXQueryServerString (xdisplay, screen_num, GLX_VENDOR));
g_message (" -- Server GLX_VERSION : %s",
glXQueryServerString (xdisplay, screen_num, GLX_VERSION));
g_message (" -- Server GLX_EXTENSIONS : %s",
glXQueryServerString (xdisplay, screen_num, GLX_EXTENSIONS));
g_message (" -- Client GLX_VENDOR : %s",
glXGetClientString (xdisplay, GLX_VENDOR));
g_message (" -- Client GLX_VERSION : %s",
glXGetClientString (xdisplay, GLX_VERSION));
g_message (" -- Client GLX_EXTENSIONS : %s",
glXGetClientString (xdisplay, GLX_EXTENSIONS));
done = TRUE;
}
}
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