xorg-server-1.4/hw/xfree86/dixmods/glxmodule.c

   1 /**************************************************************************
   2
   3 Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
   4 All Rights Reserved.
   5
   6 Permission is hereby granted, free of charge, to any person obtaining a
   7 copy of this software and associated documentation files (the
   8 "Software"), to deal in the Software without restriction, including
   9 without limitation the rights to use, copy, modify, merge, publish,
  10 distribute, sub license, and/or sell copies of the Software, and to
  11 permit persons to whom the Software is furnished to do so, subject to
  12 the following conditions:
  13
  14 The above copyright notice and this permission notice (including the
  15 next paragraph) shall be included in all copies or substantial portions
  16 of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  22 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26 **************************************************************************/
  27
  28 /*
  29  * Authors:
  30  *   Kevin E. Martin <kevin@precisioninsight.com>
  31  *
  32  */
  33
  34 #ifdef HAVE_XORG_CONFIG_H
  35 #include <xorg-config.h>
  36 #endif
  37
  38 #include "xf86Module.h"
  39 #include "xf86Priv.h"
  40 #include "xf86.h"
  41 #include "colormap.h"
  42 #include "micmap.h"
  43 #include "globals.h"
  44
  45 typedef struct __GLXscreen __GLXscreen;
  46 typedef struct __GLXprovider __GLXprovider;
  47 struct __GLXprovider {
  48     __GLXscreen *(*screenProbe)(ScreenPtr pScreen);
  49     const char    *name;
  50     __GLXprovider *next;
  51 };
  52
  53 extern void GlxPushProvider(__GLXprovider *provider);
  54 extern void GlxExtensionInit(void);
  55 extern void GlxWrapInitVisuals(miInitVisualsProcPtr *);
  56
  57 static MODULESETUPPROTO(glxSetup);
  58
  59 static const char *initdeps[] = { "DOUBLE-BUFFER", NULL };
  60
  61 static ExtensionModule GLXExt =
  62 {
  63     GlxExtensionInit,
  64     "GLX",
  65     &noGlxExtension,
  66     NULL,
  67     initdeps
  68 };
  69
  70 static XF86ModuleVersionInfo VersRec =
  71 {
  72         "glx",
  73         MODULEVENDORSTRING,
  74         MODINFOSTRING1,
  75         MODINFOSTRING2,
  76         XORG_VERSION_CURRENT,
  77         1, 0, 0,
  78         ABI_CLASS_EXTENSION,
  79         ABI_EXTENSION_VERSION,
  80         MOD_CLASS_NONE,
  81         {0,0,0,0}
  82 };
  83
  84 _X_EXPORT XF86ModuleData glxModuleData = { &VersRec, glxSetup, NULL };
  85
  86 /* We do a little proxy dance here, so we can avoid loading GLcore
  87  * unless we really need to.*/
  88
  89 static pointer glxModule;
  90
  91 static __GLXscreen *
  92 __glXMesaProxyScreenProbe(ScreenPtr pScreen)
  93 {
  94   pointer GLcore;
  95   static __GLXprovider *provider;
  96
  97   if (provider == NULL) {
  98     GLcore = LoadSubModule(glxModule, "GLcore", NULL, NULL, NULL, NULL,
  99                            NULL, NULL);
 100     if (GLcore == NULL)
 101       return NULL;
 102
 103     provider = LoaderSymbol("__glXMesaProvider");
 104     if (provider == NULL)
 105       return NULL;
 106   }
 107
 108   return provider->screenProbe(pScreen);
 109 }
 110
 111 static __GLXprovider __glXMesaProxyProvider = {
 112     __glXMesaProxyScreenProbe,
 113     "MESA-PROXY",
 114     NULL
 115 };
 116
 117
 118 static pointer
 119 glxSetup(pointer module, pointer opts, int *errmaj, int *errmin)
 120 {
 121     static Bool setupDone = FALSE;
 122     __GLXprovider *provider;
 123
 124     if (setupDone) {
 125         if (errmaj) *errmaj = LDR_ONCEONLY;
 126         return NULL;
 127     }
 128
 129     setupDone = TRUE;
 130
 131     glxModule = module;
 132     GlxPushProvider(&__glXMesaProxyProvider);
 133
 134     xf86Msg(xf86Info.aiglxFrom, "AIGLX %s\n",
 135             xf86Info.aiglx ? "enabled" : "disabled");
 136     if (xf86Info.aiglx) {
 137       provider = LoaderSymbol("__glXDRIProvider");
 138       if (provider)
 139         GlxPushProvider(provider);
 140     }
 141
 142     LoadExtension(&GLXExt, FALSE);
 143     /* Wrap the init visuals routine in micmap.c */
 144     GlxWrapInitVisuals(&miInitVisualsProc);
 145     /* Make sure this gets wrapped each time InitVisualWrap is called */
 146     miHookInitVisuals(NULL, GlxWrapInitVisuals);
 147
 148  bail:
 149     return module;
 150 }