dri_common.c revision 6ddf66e9230ee862ac341c4767cf6b3b2dd2552b 
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
162static GLboolean
163__driGetMSCRate(__DRIdrawable *draw,
164		int32_t * numerator, int32_t * denominator,
165		void *loaderPrivate)
166{
167   __GLXDRIdrawable *glxDraw = loaderPrivate;
168
169   return __glxGetMscRate(glxDraw, numerator, denominator);
170}
171
172_X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
173   {__DRI_SYSTEM_TIME, __DRI_SYSTEM_TIME_VERSION},
174   __glXGetUST,
175   __driGetMSCRate
176};
177
178#define __ATTRIB(attrib, field) \
179    { attrib, offsetof(struct glx_config, field) }
180
181static const struct
182{
183   unsigned int attrib, offset;
184} attribMap[] = {
185   __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
186      __ATTRIB(__DRI_ATTRIB_LEVEL, level),
187      __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
188      __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
189      __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
190      __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
191      __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
192      __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
193      __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
194      __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
195      __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
196      __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
197      __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
198      __ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
199      __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
200      __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
201      __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
202#if 0
203      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
204      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
205      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
206      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
207      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
208      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
209      __ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
210      __ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
211      __ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
212      __ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
213#endif
214      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
215      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
216      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
217      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
218      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
219#if 0
220      __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
221#endif
222__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
223      __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
224      __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
225                     bindToMipmapTexture),
226      __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),};
227
228static int
229scalarEqual(struct glx_config *mode, unsigned int attrib, unsigned int value)
230{
231   unsigned int glxValue;
232   int i;
233
234   for (i = 0; i < ARRAY_SIZE(attribMap); i++)
235      if (attribMap[i].attrib == attrib) {
236         glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
237         return glxValue == GLX_DONT_CARE || glxValue == value;
238      }
239
240   return GL_TRUE;              /* Is a non-existing attribute equal to value? */
241}
242
243static int
244driConfigEqual(const __DRIcoreExtension *core,
245               struct glx_config *config, const __DRIconfig *driConfig)
246{
247   unsigned int attrib, value, glxValue;
248   int i;
249
250   i = 0;
251   while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
252      switch (attrib) {
253      case __DRI_ATTRIB_RENDER_TYPE:
254         glxValue = 0;
255         if (value & __DRI_ATTRIB_RGBA_BIT) {
256            glxValue |= GLX_RGBA_BIT;
257         }
258         else if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
259            glxValue |= GLX_COLOR_INDEX_BIT;
260         }
261         if (glxValue != config->renderType)
262            return GL_FALSE;
263         break;
264
265      case __DRI_ATTRIB_CONFIG_CAVEAT:
266         if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
267            glxValue = GLX_NON_CONFORMANT_CONFIG;
268         else if (value & __DRI_ATTRIB_SLOW_BIT)
269            glxValue = GLX_SLOW_CONFIG;
270         else
271            glxValue = GLX_NONE;
272         if (glxValue != config->visualRating)
273            return GL_FALSE;
274         break;
275
276      case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
277         glxValue = 0;
278         if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
279            glxValue |= GLX_TEXTURE_1D_BIT_EXT;
280         if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
281            glxValue |= GLX_TEXTURE_2D_BIT_EXT;
282         if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
283            glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
284         if (config->bindToTextureTargets != GLX_DONT_CARE &&
285             glxValue != config->bindToTextureTargets)
286            return GL_FALSE;
287         break;
288
289      default:
290         if (!scalarEqual(config, attrib, value))
291            return GL_FALSE;
292      }
293   }
294
295   return GL_TRUE;
296}
297
298static struct glx_config *
299createDriMode(const __DRIcoreExtension * core,
300	      struct glx_config *config, const __DRIconfig **driConfigs)
301{
302   __GLXDRIconfigPrivate *driConfig;
303   int i;
304
305   for (i = 0; driConfigs[i]; i++) {
306      if (driConfigEqual(core, config, driConfigs[i]))
307         break;
308   }
309
310   if (driConfigs[i] == NULL)
311      return NULL;
312
313   driConfig = Xmalloc(sizeof *driConfig);
314   if (driConfig == NULL)
315      return NULL;
316
317   driConfig->base = *config;
318   driConfig->driConfig = driConfigs[i];
319
320   return &driConfig->base;
321}
322
323_X_HIDDEN struct glx_config *
324driConvertConfigs(const __DRIcoreExtension * core,
325                  struct glx_config *configs, const __DRIconfig **driConfigs)
326{
327   struct glx_config head, *tail, *m;
328
329   tail = &head;
330   head.next = NULL;
331   for (m = configs; m; m = m->next) {
332      tail->next = createDriMode(core, m, driConfigs);
333      if (tail->next == NULL) {
334         /* no matching dri config for m */
335         continue;
336      }
337
338
339      tail = tail->next;
340   }
341
342   glx_config_destroy_list(configs);
343
344   return head.next;
345}
346
347_X_HIDDEN void
348driDestroyConfigs(const __DRIconfig **configs)
349{
350   int i;
351
352   for (i = 0; configs[i]; i++)
353      free((__DRIconfig *) configs[i]);
354   free(configs);
355}
356
357#endif /* GLX_DIRECT_RENDERING */
358