glxmodule.c revision 05b261ec 
1/**************************************************************************
2
3Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
4All Rights Reserved.
5
6Permission is hereby granted, free of charge, to any person obtaining a
7copy of this software and associated documentation files (the
8"Software"), to deal in the Software without restriction, including
9without limitation the rights to use, copy, modify, merge, publish,
10distribute, sub license, and/or sell copies of the Software, and to
11permit persons to whom the Software is furnished to do so, subject to
12the following conditions:
13
14The above copyright notice and this permission notice (including the
15next paragraph) shall be included in all copies or substantial portions
16of the Software.
17
18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
22ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24SOFTWARE 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
45typedef struct __GLXscreen __GLXscreen;
46typedef struct __GLXprovider __GLXprovider;
47struct __GLXprovider {
48    __GLXscreen *(*screenProbe)(ScreenPtr pScreen);
49    const char    *name;
50    __GLXprovider *next;
51};
52
53extern void GlxPushProvider(__GLXprovider *provider);
54extern void GlxExtensionInit(void);
55extern void GlxWrapInitVisuals(miInitVisualsProcPtr *);
56
57static MODULESETUPPROTO(glxSetup);
58
59static const char *initdeps[] = { "DOUBLE-BUFFER", NULL };
60
61static ExtensionModule GLXExt =
62{
63    GlxExtensionInit,
64    "GLX",
65    &noGlxExtension,
66    NULL,
67    initdeps
68};
69
70static 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
89static pointer glxModule;
90
91static __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
111static __GLXprovider __glXMesaProxyProvider = {
112    __glXMesaProxyScreenProbe,
113    "MESA-PROXY",
114    NULL
115};
116
117
118static pointer
119glxSetup(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}
151