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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.
*/
#include <string.h>
#include "gdkglwin32.h"
#include "gdkglprivate-win32.h"
#include "gdkglquery.h"
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
#include <gdk/gdkdisplay.h>
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
gboolean
gdk_gl_query_extension (void)
{
return TRUE;
#if 0
DWORD version = GetVersion ();
DWORD major = (DWORD) (LOBYTE (LOWORD (version)));
if (version < 0x80000000) /* Windows NT/2000/XP */
{
if (major >= 3)
return TRUE;
}
else /* Windows 95/98/Me */
{
if (major >= 4)
return TRUE;
}
return FALSE;
#endif
}
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
gboolean
gdk_gl_query_extension_for_display (GdkDisplay *display)
{
g_return_val_if_fail (display == gdk_display_get_default (), FALSE);
return TRUE;
#if 0
DWORD version = GetVersion ();
DWORD major = (DWORD) (LOBYTE (LOWORD (version)));
if (version < 0x80000000) /* Windows NT/2000/XP */
{
if (major >= 3)
return TRUE;
}
else /* Windows 95/98/Me */
{
if (major >= 4)
return TRUE;
}
return FALSE;
#endif
}
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
gboolean
gdk_gl_query_version (int *major,
int *minor)
{
DWORD version = GetVersion ();
/* return Windows version. */
*major = (int) (LOBYTE (LOWORD (version)));
*minor = (int) (HIBYTE (LOWORD (version)));
return TRUE;
}
#ifdef GDKGLEXT_MULTIHEAD_SUPPORT
gboolean
gdk_gl_query_version_for_display (GdkDisplay *display,
int *major,
int *minor)
{
DWORD version;
g_return_val_if_fail (display == gdk_display_get_default (), FALSE);
version = GetVersion ();
/* return Windows version. */
*major = (int) (LOBYTE (LOWORD (version)));
*minor = (int) (HIBYTE (LOWORD (version)));
return TRUE;
}
#endif /* GDKGLEXT_MULTIHEAD_SUPPORT */
gboolean
gdk_win32_gl_query_wgl_extension (GdkGLConfig *glconfig,
const char *extension)
{
typedef const char * (WINAPI * __wglGetExtensionsStringARBProc) (HDC);
typedef const char * (WINAPI * __wglGetExtensionsStringEXTProc) (void);
__wglGetExtensionsStringARBProc wgl_get_extensions_string_arb;
__wglGetExtensionsStringEXTProc wgl_get_extensions_string_ext;
static const char *extensions = NULL;
const char *start;
char *where, *terminator;
HDC hdc;
/* Extension names should not have spaces. */
where = strchr (extension, ' ');
if (where || *extension == '\0')
return FALSE;
if (extensions == NULL)
{
/* Try wglGetExtensionsStringARB. */
wgl_get_extensions_string_arb =
(__wglGetExtensionsStringARBProc) gdk_gl_get_proc_address ("wglGetExtensionsStringARB");
if (wgl_get_extensions_string_arb)
{
hdc = GetDC (NULL);
if (hdc == NULL)
{
g_warning ("cannot get DC");
}
else
{
extensions = wgl_get_extensions_string_arb (hdc);
ReleaseDC (NULL, hdc);
}
}
if (extensions == NULL)
{
/* Try wglGetExtensionsStringEXT. */
wgl_get_extensions_string_ext =
(__wglGetExtensionsStringEXTProc) gdk_gl_get_proc_address ("wglGetExtensionsStringEXT");
if (wgl_get_extensions_string_ext)
extensions = wgl_get_extensions_string_ext ();
}
if (extensions == NULL)
return FALSE;
}
/* It takes a bit of care to be fool-proof about parsing
the WGL 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_gl_get_proc_address (const char *proc_name)
{
GdkGLProc proc_address = NULL;
HMODULE hmodule;
GDK_GL_NOTE_FUNC ();
if (strncmp ("glu", proc_name, 3) != 0)
{
/* Try wglGetProcAddress () */
proc_address = (GdkGLProc) wglGetProcAddress (proc_name);
GDK_GL_NOTE (IMPL, g_message (" ** wglGetProcAddress () - %s",
proc_address ? "succeeded" : "failed"));
if (proc_address != NULL)
return proc_address;
/* Try GetProcAddress () */
/* opengl32.dll */
GDK_GL_NOTE (MISC, g_message (" - Get opengl32.dll module handle"));
hmodule = GetModuleHandle ("opengl32.dll");
if (hmodule == NULL)
g_warning ("Cannot get opengl32.dll module handle");
else
proc_address = (GdkGLProc) GetProcAddress (hmodule, proc_name);
GDK_GL_NOTE (IMPL, g_message (" ** GetProcAddress () - %s",
proc_address ? "succeeded" : "failed"));
}
else
{
/* glu32.dll */
GDK_GL_NOTE (MISC, g_message (" - Get glu32.dll module handle"));
hmodule = GetModuleHandle ("glu32.dll");
if (hmodule == NULL)
g_warning ("Cannot get glu32.dll module handle");
else
proc_address = (GdkGLProc) GetProcAddress (hmodule, proc_name);
GDK_GL_NOTE (IMPL, g_message (" ** GetProcAddress () - %s",
proc_address ? "succeeded" : "failed"));
}
return proc_address;
}
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