dri_common.c revision 16887d042a917fa4773e4d853f50051b54e9948c 
1/*
2 * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
3 * Copyright © 2008 Red Hat, Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Soft-
7 * ware"), to deal in the Software without restriction, including without
8 * limitation the rights to use, copy, modify, merge, publish, distribute,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, provided that the above copyright
11 * notice(s) and this permission notice appear in all copies of the Soft-
12 * ware and that both the above copyright notice(s) and this permission
13 * notice appear in supporting documentation.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
17 * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
18 * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
19 * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
20 * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
23 * MANCE OF THIS SOFTWARE.
24 *
25 * Except as contained in this notice, the name of a copyright holder shall
26 * not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization of
28 * the copyright holder.
29 *
30 * Authors:
31 *   Kevin E. Martin <kevin@precisioninsight.com>
32 *   Brian Paul <brian@precisioninsight.com>
33 *   Kristian Høgsberg (krh@redhat.com)
34 */
35
36#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
37
38#include <unistd.h>
39#include <dlfcn.h>
40#include <stdarg.h>
41#include "glxclient.h"
42#include "dri_common.h"
43
44#ifndef RTLD_NOW
45#define RTLD_NOW 0
46#endif
47#ifndef RTLD_GLOBAL
48#define RTLD_GLOBAL 0
49#endif
50
51_X_HIDDEN void
52InfoMessageF(const char *f, ...)
53{
54   va_list args;
55   const char *env;
56
57   if ((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) {
58      fprintf(stderr, "libGL: ");
59      va_start(args, f);
60      vfprintf(stderr, f, args);
61      va_end(args);
62   }
63}
64
65/**
66 * Print error to stderr, unless LIBGL_DEBUG=="quiet".
67 */
68_X_HIDDEN void
69ErrorMessageF(const char *f, ...)
70{
71   va_list args;
72   const char *env;
73
74   if ((env = getenv("LIBGL_DEBUG")) && !strstr(env, "quiet")) {
75      fprintf(stderr, "libGL error: ");
76      va_start(args, f);
77      vfprintf(stderr, f, args);
78      va_end(args);
79   }
80}
81
82#ifndef DEFAULT_DRIVER_DIR
83/* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
84#define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
85#endif
86
87/**
88 * Try to \c dlopen the named driver.
89 *
90 * This function adds the "_dri.so" suffix to the driver name and searches the
91 * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
92 * order to find the driver.
93 *
94 * \param driverName - a name like "tdfx", "i810", "mga", etc.
95 *
96 * \returns
97 * A handle from \c dlopen, or \c NULL if driver file not found.
98 */
99_X_HIDDEN void *
100driOpenDriver(const char *driverName)
101{
102   void *glhandle, *handle;
103   const char *libPaths, *p, *next;
104   char realDriverName[200];
105   int len;
106
107   /* Attempt to make sure libGL symbols will be visible to the driver */
108   glhandle = dlopen("libGL.so.1", RTLD_NOW | RTLD_GLOBAL);
109
110   libPaths = NULL;
111   if (geteuid() == getuid()) {
112      /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
113      libPaths = getenv("LIBGL_DRIVERS_PATH");
114      if (!libPaths)
115         libPaths = getenv("LIBGL_DRIVERS_DIR");        /* deprecated */
116   }
117   if (libPaths == NULL)
118      libPaths = DEFAULT_DRIVER_DIR;
119
120   handle = NULL;
121   for (p = libPaths; *p; p = next) {
122      next = strchr(p, ':');
123      if (next == NULL) {
124         len = strlen(p);
125         next = p + len;
126      }
127      else {
128         len = next - p;
129         next++;
130      }
131
132#ifdef GLX_USE_TLS
133      snprintf(realDriverName, sizeof realDriverName,
134               "%.*s/tls/%s_dri.so", len, p, driverName);
135      InfoMessageF("OpenDriver: trying %s\n", realDriverName);
136      handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
137#endif
138
139      if (handle == NULL) {
140         snprintf(realDriverName, sizeof realDriverName,
141                  "%.*s/%s_dri.so", len, p, driverName);
142         InfoMessageF("OpenDriver: trying %s\n", realDriverName);
143         handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
144      }
145
146      if (handle != NULL)
147         break;
148      else
149         ErrorMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
150   }
151
152   if (!handle)
153      ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);
154
155   if (glhandle)
156      dlclose(glhandle);
157
158   return handle;
159}
160
161static GLboolean
162__driGetMSCRate(__DRIdrawable *draw,
163		int32_t * numerator, int32_t * denominator,
164		void *loaderPrivate)
165{
166   __GLXDRIdrawable *glxDraw = loaderPrivate;
167
168   return __glxGetMscRate(glxDraw, numerator, denominator);
169}
170
171_X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
172   {__DRI_SYSTEM_TIME, __DRI_SYSTEM_TIME_VERSION},
173   __glXGetUST,
174   __driGetMSCRate
175};
176
177#define __ATTRIB(attrib, field) \
178    { attrib, offsetof(struct glx_config, field) }
179
180static const struct
181{
182   unsigned int attrib, offset;
183} attribMap[] = {
184   __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
185      __ATTRIB(__DRI_ATTRIB_LEVEL, level),
186      __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
187      __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
188      __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
189      __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
190      __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
191      __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
192      __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
193      __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
194      __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
195      __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
196      __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
197      __ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
198      __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
199      __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
200      __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
201#if 0
202      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
203      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
204      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
205      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
206      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
207      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
208      __ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
209      __ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
210      __ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
211      __ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
212#endif
213      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
214      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
215      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
216      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
217      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
218#if 0
219      __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
220#endif
221__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
222      __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
223      __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
224                     bindToMipmapTexture),
225      __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),};
226
227static int
228scalarEqual(struct glx_config *mode, unsigned int attrib, unsigned int value)
229{
230   unsigned int glxValue;
231   int i;
232
233   for (i = 0; i < ARRAY_SIZE(attribMap); i++)
234      if (attribMap[i].attrib == attrib) {
235         glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
236         return glxValue == GLX_DONT_CARE || glxValue == value;
237      }
238
239   return GL_TRUE;              /* Is a non-existing attribute equal to value? */
240}
241
242static int
243driConfigEqual(const __DRIcoreExtension *core,
244               struct glx_config *config, const __DRIconfig *driConfig)
245{
246   unsigned int attrib, value, glxValue;
247   int i;
248
249   i = 0;
250   while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
251      switch (attrib) {
252      case __DRI_ATTRIB_RENDER_TYPE:
253         glxValue = 0;
254         if (value & __DRI_ATTRIB_RGBA_BIT) {
255            glxValue |= GLX_RGBA_BIT;
256         }
257         else if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
258            glxValue |= GLX_COLOR_INDEX_BIT;
259         }
260         if (glxValue != config->renderType)
261            return GL_FALSE;
262         break;
263
264      case __DRI_ATTRIB_CONFIG_CAVEAT:
265         if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
266            glxValue = GLX_NON_CONFORMANT_CONFIG;
267         else if (value & __DRI_ATTRIB_SLOW_BIT)
268            glxValue = GLX_SLOW_CONFIG;
269         else
270            glxValue = GLX_NONE;
271         if (glxValue != config->visualRating)
272            return GL_FALSE;
273         break;
274
275      case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
276         glxValue = 0;
277         if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
278            glxValue |= GLX_TEXTURE_1D_BIT_EXT;
279         if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
280            glxValue |= GLX_TEXTURE_2D_BIT_EXT;
281         if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
282            glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
283         if (config->bindToTextureTargets != GLX_DONT_CARE &&
284             glxValue != config->bindToTextureTargets)
285            return GL_FALSE;
286         break;
287
288      default:
289         if (!scalarEqual(config, attrib, value))
290            return GL_FALSE;
291      }
292   }
293
294   return GL_TRUE;
295}
296
297static struct glx_config *
298createDriMode(const __DRIcoreExtension * core,
299	      struct glx_config *config, const __DRIconfig **driConfigs)
300{
301   __GLXDRIconfigPrivate *driConfig;
302   int i;
303
304   for (i = 0; driConfigs[i]; i++) {
305      if (driConfigEqual(core, config, driConfigs[i]))
306         break;
307   }
308
309   if (driConfigs[i] == NULL)
310      return NULL;
311
312   driConfig = Xmalloc(sizeof *driConfig);
313   if (driConfig == NULL)
314      return NULL;
315
316   driConfig->base = *config;
317   driConfig->driConfig = driConfigs[i];
318
319   return &driConfig->base;
320}
321
322_X_HIDDEN struct glx_config *
323driConvertConfigs(const __DRIcoreExtension * core,
324                  struct glx_config *configs, const __DRIconfig **driConfigs)
325{
326   struct glx_config head, *tail, *m;
327
328   tail = &head;
329   head.next = NULL;
330   for (m = configs; m; m = m->next) {
331      tail->next = createDriMode(core, m, driConfigs);
332      if (tail->next == NULL) {
333         /* no matching dri config for m */
334         continue;
335      }
336
337
338      tail = tail->next;
339   }
340
341   glx_config_destroy_list(configs);
342
343   return head.next;
344}
345
346_X_HIDDEN void
347driDestroyConfigs(const __DRIconfig **configs)
348{
349   int i;
350
351   for (i = 0; configs[i]; i++)
352      free((__DRIconfig *) configs[i]);
353   free(configs);
354}
355
356_X_HIDDEN __GLXDRIdrawable *
357driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable)
358{
359   struct glx_display *const priv = __glXInitialize(gc->psc->dpy);
360   __GLXDRIdrawable *pdraw;
361   struct glx_screen *psc;
362
363   if (priv == NULL)
364      return NULL;
365
366   psc = priv->screens[gc->screen];
367   if (priv->drawHash == NULL)
368      return NULL;
369
370   if (__glxHashLookup(priv->drawHash, glxDrawable, (void *) &pdraw) == 0)
371      return pdraw;
372
373   pdraw = psc->driScreen->createDrawable(psc, glxDrawable,
374                                          glxDrawable, gc->config);
375   if (__glxHashInsert(priv->drawHash, glxDrawable, pdraw)) {
376      (*pdraw->destroyDrawable) (pdraw);
377      return NULL;
378   }
379
380   return pdraw;
381}
382
383_X_HIDDEN void
384driReleaseDrawables(struct glx_context *gc)
385{
386   struct glx_display *const priv = __glXInitialize(gc->psc->dpy);
387   __GLXDRIdrawable *pdraw;
388
389   if (priv == NULL)
390      return;
391
392   if (__glxHashLookup(priv->drawHash,
393		       gc->currentDrawable, (void *) &pdraw) == 0) {
394      if (pdraw->drawable == pdraw->xDrawable)
395	 (*pdraw->destroyDrawable)(pdraw);
396      __glxHashDelete(priv->drawHash, gc->currentDrawable);
397   }
398
399   if (gc->currentDrawable != gc->currentReadable &&
400       __glxHashLookup(priv->drawHash,
401		       gc->currentReadable, (void *) &pdraw) == 0) {
402      if (pdraw->drawable == pdraw->xDrawable)
403	 (*pdraw->destroyDrawable)(pdraw);
404      __glxHashDelete(priv->drawHash, gc->currentReadable);
405   }
406}
407
408#endif /* GLX_DIRECT_RENDERING */
409