dri_common.c revision 80b280db883edc9550484dba03bd5c124b6a9bf9 
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 "glcontextmodes.h"
43#include "dri_common.h"
44
45#ifndef RTLD_NOW
46#define RTLD_NOW 0
47#endif
48#ifndef RTLD_GLOBAL
49#define RTLD_GLOBAL 0
50#endif
51
52_X_HIDDEN void
53InfoMessageF(const char *f, ...)
54{
55   va_list args;
56   const char *env;
57
58   if ((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) {
59      fprintf(stderr, "libGL: ");
60      va_start(args, f);
61      vfprintf(stderr, f, args);
62      va_end(args);
63   }
64}
65
66/**
67 * Print error to stderr, unless LIBGL_DEBUG=="quiet".
68 */
69_X_HIDDEN void
70ErrorMessageF(const char *f, ...)
71{
72   va_list args;
73   const char *env;
74
75   if ((env = getenv("LIBGL_DEBUG")) && !strstr(env, "quiet")) {
76      fprintf(stderr, "libGL error: ");
77      va_start(args, f);
78      vfprintf(stderr, f, args);
79      va_end(args);
80   }
81}
82
83#ifndef DEFAULT_DRIVER_DIR
84/* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
85#define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
86#endif
87
88/**
89 * Try to \c dlopen the named driver.
90 *
91 * This function adds the "_dri.so" suffix to the driver name and searches the
92 * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
93 * order to find the driver.
94 *
95 * \param driverName - a name like "tdfx", "i810", "mga", etc.
96 *
97 * \returns
98 * A handle from \c dlopen, or \c NULL if driver file not found.
99 */
100_X_HIDDEN void *
101driOpenDriver(const char *driverName)
102{
103   void *glhandle, *handle;
104   const char *libPaths, *p, *next;
105   char realDriverName[200];
106   int len;
107
108   /* Attempt to make sure libGL symbols will be visible to the driver */
109   glhandle = dlopen("libGL.so.1", RTLD_NOW | RTLD_GLOBAL);
110
111   libPaths = NULL;
112   if (geteuid() == getuid()) {
113      /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
114      libPaths = getenv("LIBGL_DRIVERS_PATH");
115      if (!libPaths)
116         libPaths = getenv("LIBGL_DRIVERS_DIR");        /* deprecated */
117   }
118   if (libPaths == NULL)
119      libPaths = DEFAULT_DRIVER_DIR;
120
121   handle = NULL;
122   for (p = libPaths; *p; p = next) {
123      next = strchr(p, ':');
124      if (next == NULL) {
125         len = strlen(p);
126         next = p + len;
127      }
128      else {
129         len = next - p;
130         next++;
131      }
132
133#ifdef GLX_USE_TLS
134      snprintf(realDriverName, sizeof realDriverName,
135               "%.*s/tls/%s_dri.so", len, p, driverName);
136      InfoMessageF("OpenDriver: trying %s\n", realDriverName);
137      handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
138#endif
139
140      if (handle == NULL) {
141         snprintf(realDriverName, sizeof realDriverName,
142                  "%.*s/%s_dri.so", len, p, driverName);
143         InfoMessageF("OpenDriver: trying %s\n", realDriverName);
144         handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
145      }
146
147      if (handle != NULL)
148         break;
149      else
150         ErrorMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
151   }
152
153   if (!handle)
154      ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);
155
156   if (glhandle)
157      dlclose(glhandle);
158
159   return handle;
160}
161
162_X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
163   {__DRI_SYSTEM_TIME, __DRI_SYSTEM_TIME_VERSION},
164   __glXGetUST,
165   __driGetMscRateOML
166};
167
168#define __ATTRIB(attrib, field) \
169    { attrib, offsetof(__GLcontextModes, field) }
170
171static const struct
172{
173   unsigned int attrib, offset;
174} attribMap[] = {
175   __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
176      __ATTRIB(__DRI_ATTRIB_LEVEL, level),
177      __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
178      __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
179      __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
180      __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
181      __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
182      __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
183      __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
184      __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
185      __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
186      __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
187      __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
188      __ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
189      __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
190      __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
191      __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
192#if 0
193      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
194      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
195      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
196      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
197      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
198      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
199      __ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
200      __ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
201      __ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
202      __ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
203#endif
204      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
205      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
206      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
207      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
208      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
209#if 0
210      __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
211#endif
212__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
213      __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
214      __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
215                     bindToMipmapTexture),
216      __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),};
217
218#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
219
220static int
221scalarEqual(__GLcontextModes * mode, unsigned int attrib, unsigned int value)
222{
223   unsigned int glxValue;
224   int i;
225
226   for (i = 0; i < ARRAY_SIZE(attribMap); i++)
227      if (attribMap[i].attrib == attrib) {
228         glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
229         return glxValue == GLX_DONT_CARE || glxValue == value;
230      }
231
232   return GL_TRUE;              /* Is a non-existing attribute equal to value? */
233}
234
235static int
236driConfigEqual(const __DRIcoreExtension * core,
237               __GLcontextModes * modes, const __DRIconfig * driConfig)
238{
239   unsigned int attrib, value, glxValue;
240   int i;
241
242   i = 0;
243   while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
244      switch (attrib) {
245      case __DRI_ATTRIB_RENDER_TYPE:
246         glxValue = 0;
247         if (value & __DRI_ATTRIB_RGBA_BIT) {
248            glxValue |= GLX_RGBA_BIT;
249         }
250         else if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
251            glxValue |= GLX_COLOR_INDEX_BIT;
252         }
253         if (glxValue != modes->renderType)
254            return GL_FALSE;
255         break;
256
257      case __DRI_ATTRIB_CONFIG_CAVEAT:
258         if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
259            glxValue = GLX_NON_CONFORMANT_CONFIG;
260         else if (value & __DRI_ATTRIB_SLOW_BIT)
261            glxValue = GLX_SLOW_CONFIG;
262         else
263            glxValue = GLX_NONE;
264         if (glxValue != modes->visualRating)
265            return GL_FALSE;
266         break;
267
268      case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
269         glxValue = 0;
270         if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
271            glxValue |= GLX_TEXTURE_1D_BIT_EXT;
272         if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
273            glxValue |= GLX_TEXTURE_2D_BIT_EXT;
274         if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
275            glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
276         if (modes->bindToTextureTargets != GLX_DONT_CARE &&
277             glxValue != modes->bindToTextureTargets)
278            return GL_FALSE;
279         break;
280
281      default:
282         if (!scalarEqual(modes, attrib, value))
283            return GL_FALSE;
284      }
285   }
286
287   return GL_TRUE;
288}
289
290static __GLcontextModes *
291createDriMode(const __DRIcoreExtension * core,
292              __GLcontextModes * modes, const __DRIconfig ** driConfigs)
293{
294   __GLXDRIconfigPrivate *config;
295   int i;
296
297   for (i = 0; driConfigs[i]; i++) {
298      if (driConfigEqual(core, modes, driConfigs[i]))
299         break;
300   }
301
302   if (driConfigs[i] == NULL)
303      return NULL;
304
305   config = Xmalloc(sizeof *config);
306   if (config == NULL)
307      return NULL;
308
309   config->modes = *modes;
310   config->driConfig = driConfigs[i];
311
312   return &config->modes;
313}
314
315_X_HIDDEN __GLcontextModes *
316driConvertConfigs(const __DRIcoreExtension * core,
317                  __GLcontextModes * modes, const __DRIconfig ** configs)
318{
319   __GLcontextModes head, *tail, *m;
320
321   tail = &head;
322   head.next = NULL;
323   for (m = modes; m; m = m->next) {
324      tail->next = createDriMode(core, m, configs);
325      if (tail->next == NULL) {
326         /* no matching dri config for m */
327         continue;
328      }
329
330
331      tail = tail->next;
332   }
333
334   _gl_context_modes_destroy(modes);
335
336   return head.next;
337}
338
339/* Bind DRI1 specific extensions */
340_X_HIDDEN void
341driBindExtensions(__GLXscreenConfigs *psc)
342{
343   const __DRIextension **extensions;
344   int i;
345
346   extensions = psc->core->getExtensions(psc->__driScreen);
347
348   for (i = 0; extensions[i]; i++) {
349#ifdef __DRI_SWAP_CONTROL
350      /* No DRI2 support for swap_control at the moment, since SwapBuffers
351       * is done by the X server */
352      if (strcmp(extensions[i]->name, __DRI_SWAP_CONTROL) == 0) {
353	 psc->swapControl = (__DRIswapControlExtension *) extensions[i];
354	 __glXEnableDirectExtension(psc, "GLX_SGI_swap_control");
355	 __glXEnableDirectExtension(psc, "GLX_MESA_swap_control");
356      }
357#endif
358
359#ifdef __DRI_MEDIA_STREAM_COUNTER
360      if (strcmp(extensions[i]->name, __DRI_MEDIA_STREAM_COUNTER) == 0) {
361         psc->msc = (__DRImediaStreamCounterExtension *) extensions[i];
362         __glXEnableDirectExtension(psc, "GLX_SGI_video_sync");
363      }
364#endif
365
366#ifdef __DRI_SWAP_BUFFER_COUNTER
367      /* No driver supports this at this time and the extension is
368       * not defined in dri_interface.h.  Will enable
369       * GLX_OML_sync_control if implemented. */
370#endif
371
372      /* Ignore unknown extensions */
373   }
374}
375
376/* Bind DRI2 specific extensions */
377_X_HIDDEN void
378dri2BindExtensions(__GLXscreenConfigs *psc)
379{
380   const __DRIextension **extensions;
381   int i;
382
383   extensions = psc->core->getExtensions(psc->__driScreen);
384
385   for (i = 0; extensions[i]; i++) {
386#ifdef __DRI_TEX_BUFFER
387      if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
388	 psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
389	 __glXEnableDirectExtension(psc, "GLX_EXT_texture_from_pixmap");
390      }
391#endif
392
393      __glXEnableDirectExtension(psc, "GLX_SGI_video_sync");
394      __glXEnableDirectExtension(psc, "GLX_SGI_swap_control");
395      __glXEnableDirectExtension(psc, "GLX_MESA_swap_control");
396
397      /* FIXME: if DRI2 version supports it... */
398      __glXEnableDirectExtension(psc, "INTEL_swap_event");
399
400#ifdef __DRI2_FLUSH
401      if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
402	 psc->f = (__DRI2flushExtension *) extensions[i];
403	 /* internal driver extension, no GL extension exposed */
404      }
405#endif
406   }
407}
408
409/* Bind extensions common to DRI1 and DRI2 */
410_X_HIDDEN void
411driBindCommonExtensions(__GLXscreenConfigs *psc)
412{
413   const __DRIextension **extensions;
414   int i;
415
416   extensions = psc->core->getExtensions(psc->__driScreen);
417
418   for (i = 0; extensions[i]; i++) {
419#ifdef __DRI_COPY_SUB_BUFFER
420      if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
421	 psc->driCopySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
422	 __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
423      }
424#endif
425
426#ifdef __DRI_ALLOCATE
427      if (strcmp(extensions[i]->name, __DRI_ALLOCATE) == 0) {
428	 psc->allocate = (__DRIallocateExtension *) extensions[i];
429	 __glXEnableDirectExtension(psc, "GLX_MESA_allocate_memory");
430      }
431#endif
432
433#ifdef __DRI_FRAME_TRACKING
434      if (strcmp(extensions[i]->name, __DRI_FRAME_TRACKING) == 0) {
435	 psc->frameTracking = (__DRIframeTrackingExtension *) extensions[i];
436	 __glXEnableDirectExtension(psc, "GLX_MESA_swap_frame_usage");
437      }
438#endif
439
440#ifdef __DRI_READ_DRAWABLE
441      if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {
442	 __glXEnableDirectExtension(psc, "GLX_SGI_make_current_read");
443      }
444#endif
445
446      /* Ignore unknown extensions */
447   }
448}
449
450#endif /* GLX_DIRECT_RENDERING */
451