summaryrefslogtreecommitdiff
path: root/src/glx/dri_common.c
blob: eb9f1e4b397197f14e9d38e6de04a4ca076303cc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
/*
 * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright © 2008 Red Hat, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Soft-
 * ware"), to deal in the Software without restriction, including without
 * limitation the rights to use, copy, modify, merge, publish, distribute,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, provided that the above copyright
 * notice(s) and this permission notice appear in all copies of the Soft-
 * ware and that both the above copyright notice(s) and this permission
 * notice appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
 * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
 * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
 * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
 * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
 * MANCE OF THIS SOFTWARE.
 *
 * Except as contained in this notice, the name of a copyright holder shall
 * not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization of
 * the copyright holder.
 *
 * Authors:
 *   Kevin E. Martin <kevin@precisioninsight.com>
 *   Brian Paul <brian@precisioninsight.com>
 *   Kristian Høgsberg (krh@redhat.com)
 */

#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)

#include <unistd.h>
#include <dlfcn.h>
#include <stdarg.h>
#include "glxclient.h"
#include "glcontextmodes.h"
#include "dri_common.h"

#ifndef RTLD_NOW
#define RTLD_NOW 0
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif

_X_HIDDEN void
InfoMessageF(const char *f, ...)
{
   va_list args;
   const char *env;

   if ((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) {
      fprintf(stderr, "libGL: ");
      va_start(args, f);
      vfprintf(stderr, f, args);
      va_end(args);
   }
}

/**
 * Print error to stderr, unless LIBGL_DEBUG=="quiet".
 */
_X_HIDDEN void
ErrorMessageF(const char *f, ...)
{
   va_list args;
   const char *env;

   if ((env = getenv("LIBGL_DEBUG")) && !strstr(env, "quiet")) {
      fprintf(stderr, "libGL error: ");
      va_start(args, f);
      vfprintf(stderr, f, args);
      va_end(args);
   }
}

#ifndef DEFAULT_DRIVER_DIR
/* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
#define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
#endif

/**
 * Try to \c dlopen the named driver.
 *
 * This function adds the "_dri.so" suffix to the driver name and searches the
 * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
 * order to find the driver.
 *
 * \param driverName - a name like "tdfx", "i810", "mga", etc.
 *
 * \returns
 * A handle from \c dlopen, or \c NULL if driver file not found.
 */
_X_HIDDEN void *
driOpenDriver(const char *driverName)
{
   void *glhandle, *handle;
   const char *libPaths, *p, *next;
   char realDriverName[200];
   int len;

   /* Attempt to make sure libGL symbols will be visible to the driver */
   glhandle = dlopen("libGL.so.1", RTLD_NOW | RTLD_GLOBAL);

   libPaths = NULL;
   if (geteuid() == getuid()) {
      /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
      libPaths = getenv("LIBGL_DRIVERS_PATH");
      if (!libPaths)
         libPaths = getenv("LIBGL_DRIVERS_DIR");        /* deprecated */
   }
   if (libPaths == NULL)
      libPaths = DEFAULT_DRIVER_DIR;

   handle = NULL;
   for (p = libPaths; *p; p = next) {
      next = strchr(p, ':');
      if (next == NULL) {
         len = strlen(p);
         next = p + len;
      }
      else {
         len = next - p;
         next++;
      }

#ifdef GLX_USE_TLS
      snprintf(realDriverName, sizeof realDriverName,
               "%.*s/tls/%s_dri.so", len, p, driverName);
      InfoMessageF("OpenDriver: trying %s\n", realDriverName);
      handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
#endif

      if (handle == NULL) {
         snprintf(realDriverName, sizeof realDriverName,
                  "%.*s/%s_dri.so", len, p, driverName);
         InfoMessageF("OpenDriver: trying %s\n", realDriverName);
         handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
      }

      if (handle != NULL)
         break;
      else
         ErrorMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
   }

   if (!handle)
      ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);

   if (glhandle)
      dlclose(glhandle);

   return handle;
}

_X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
   {__DRI_SYSTEM_TIME, __DRI_SYSTEM_TIME_VERSION},
   __glXGetUST,
   __driGetMscRateOML
};

#define __ATTRIB(attrib, field) \
    { attrib, offsetof(__GLcontextModes, field) }

static const struct
{
   unsigned int attrib, offset;
} attribMap[] = {
   __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
      __ATTRIB(__DRI_ATTRIB_LEVEL, level),
      __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
      __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
      __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
      __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
      __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
      __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
      __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
      __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
      __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
      __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
      __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
      __ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
      __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
      __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
      __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
#if 0
      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
      __ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
      __ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
      __ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
      __ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
#endif
      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
#if 0
      __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
#endif
__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
      __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
      __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
                     bindToMipmapTexture),
      __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),};

#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))

static int
scalarEqual(__GLcontextModes * mode, unsigned int attrib, unsigned int value)
{
   unsigned int glxValue;
   int i;

   for (i = 0; i < ARRAY_SIZE(attribMap); i++)
      if (attribMap[i].attrib == attrib) {
         glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
         return glxValue == GLX_DONT_CARE || glxValue == value;
      }

   return GL_TRUE;              /* Is a non-existing attribute equal to value? */
}

static int
driConfigEqual(const __DRIcoreExtension * core,
               __GLcontextModes * modes, const __DRIconfig * driConfig)
{
   unsigned int attrib, value, glxValue;
   int i;

   i = 0;
   while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
      switch (attrib) {
      case __DRI_ATTRIB_RENDER_TYPE:
         glxValue = 0;
         if (value & __DRI_ATTRIB_RGBA_BIT) {
            glxValue |= GLX_RGBA_BIT;
         }
         else if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
            glxValue |= GLX_COLOR_INDEX_BIT;
         }
         if (glxValue != modes->renderType)
            return GL_FALSE;
         break;

      case __DRI_ATTRIB_CONFIG_CAVEAT:
         if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
            glxValue = GLX_NON_CONFORMANT_CONFIG;
         else if (value & __DRI_ATTRIB_SLOW_BIT)
            glxValue = GLX_SLOW_CONFIG;
         else
            glxValue = GLX_NONE;
         if (glxValue != modes->visualRating)
            return GL_FALSE;
         break;

      case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
         glxValue = 0;
         if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
            glxValue |= GLX_TEXTURE_1D_BIT_EXT;
         if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
            glxValue |= GLX_TEXTURE_2D_BIT_EXT;
         if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
            glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
         if (modes->bindToTextureTargets != GLX_DONT_CARE &&
             glxValue != modes->bindToTextureTargets)
            return GL_FALSE;
         break;

      default:
         if (!scalarEqual(modes, attrib, value))
            return GL_FALSE;
      }
   }

   return GL_TRUE;
}

static __GLcontextModes *
createDriMode(const __DRIcoreExtension * core,
              __GLcontextModes * modes, const __DRIconfig ** driConfigs)
{
   __GLXDRIconfigPrivate *config;
   int i;

   for (i = 0; driConfigs[i]; i++) {
      if (driConfigEqual(core, modes, driConfigs[i]))
         break;
   }

   if (driConfigs[i] == NULL)
      return NULL;

   config = Xmalloc(sizeof *config);
   if (config == NULL)
      return NULL;

   config->modes = *modes;
   config->driConfig = driConfigs[i];

   return &config->modes;
}

_X_HIDDEN __GLcontextModes *
driConvertConfigs(const __DRIcoreExtension * core,
                  __GLcontextModes * modes, const __DRIconfig ** configs)
{
   __GLcontextModes head, *tail, *m;

   tail = &head;
   head.next = NULL;
   for (m = modes; m; m = m->next) {
      tail->next = createDriMode(core, m, configs);
      if (tail->next == NULL) {
         /* no matching dri config for m */
         continue;
      }


      tail = tail->next;
   }

   _gl_context_modes_destroy(modes);

   return head.next;
}

_X_HIDDEN void
driDestroyConfigs(const __DRIconfig **configs)
{
   int i;

   for (i = 0; configs[i]; i++)
      free((__DRIconfig *) configs[i]);
   free(configs);
}

#endif /* GLX_DIRECT_RENDERING */