src/glx/x11/dri_common.c

   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 #ifdef GLX_DIRECT_RENDERING
  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 InfoMessageF(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 ErrorMessageF(const char *f, ...)
  69 {
  70     va_list args;
  71     const char *env;
  72
  73     if ((env = getenv("LIBGL_DEBUG")) && !strstr(env, "quiet")) {
  74         fprintf(stderr, "libGL error: ");
  75         va_start(args, f);
  76         vfprintf(stderr, f, args);
  77         va_end(args);
  78     }
  79 }
  80
  81 #ifndef DEFAULT_DRIVER_DIR
  82 /* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
  83 #define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
  84 #endif
  85
  86 /**
  87  * Try to \c dlopen the named driver.
  88  *
  89  * This function adds the "_dri.so" suffix to the driver name and searches the
  90  * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
  91  * order to find the driver.
  92  *
  93  * \param driverName - a name like "tdfx", "i810", "mga", etc.
  94  *
  95  * \returns
  96  * A handle from \c dlopen, or \c NULL if driver file not found.
  97  */
  98 _X_HIDDEN void *driOpenDriver(const char *driverName)
  99 {
 100    void *glhandle, *handle;
 101    const char *libPaths, *p, *next;
 102    char realDriverName[200];
 103    int len;
 104
 105    /* Attempt to make sure libGL symbols will be visible to the driver */
 106    glhandle = dlopen("libGL.so.1", RTLD_NOW | RTLD_GLOBAL);
 107
 108    libPaths = NULL;
 109    if (geteuid() == getuid()) {
 110       /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
 111       libPaths = getenv("LIBGL_DRIVERS_PATH");
 112       if (!libPaths)
 113          libPaths = getenv("LIBGL_DRIVERS_DIR"); /* deprecated */
 114    }
 115    if (libPaths == NULL)
 116        libPaths = DEFAULT_DRIVER_DIR;
 117
 118    handle = NULL;
 119    for (p = libPaths; *p; p = next) {
 120        next = strchr(p, ':');
 121        if (next == NULL) {
 122            len = strlen(p);
 123            next = p + len;
 124        } else {
 125            len = next - p;
 126            next++;
 127        }
 128
 129 #ifdef GLX_USE_TLS
 130       snprintf(realDriverName, sizeof realDriverName,
 131                "%.*s/tls/%s_dri.so", len, p, driverName);
 132       InfoMessageF("OpenDriver: trying %s\n", realDriverName);
 133       handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
 134 #endif
 135
 136       if ( handle == NULL ) {
 137          snprintf(realDriverName, sizeof realDriverName,
 138                   "%.*s/%s_dri.so", len, p, driverName);
 139          InfoMessageF("OpenDriver: trying %s\n", realDriverName);
 140          handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
 141       }
 142
 143       if ( handle != NULL )
 144           break;
 145       else
 146          ErrorMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
 147    }
 148
 149    if (!handle)
 150       ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);
 151
 152    if (glhandle)
 153       dlclose(glhandle);
 154
 155    return handle;
 156 }
 157
 158 _X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
 159     { __DRI_SYSTEM_TIME, __DRI_SYSTEM_TIME_VERSION },
 160     __glXGetUST,
 161     __driGetMscRateOML
 162 };
 163
 164 #define __ATTRIB(attrib, field) \
 165     { attrib, offsetof(__GLcontextModes, field) }
 166
 167 static const struct { unsigned int attrib, offset; } attribMap[] = {
 168     __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE,                  rgbBits),
 169     __ATTRIB(__DRI_ATTRIB_LEVEL,                        level),
 170     __ATTRIB(__DRI_ATTRIB_RED_SIZE,                     redBits),
 171     __ATTRIB(__DRI_ATTRIB_GREEN_SIZE,                   greenBits),
 172     __ATTRIB(__DRI_ATTRIB_BLUE_SIZE,                    blueBits),
 173     __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE,                   alphaBits),
 174     __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE,                   depthBits),
 175     __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE,                 stencilBits),
 176     __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE,               accumRedBits),
 177     __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE,             accumGreenBits),
 178     __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE,              accumBlueBits),
 179     __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE,             accumAlphaBits),
 180     __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS,               sampleBuffers),
 181     __ATTRIB(__DRI_ATTRIB_SAMPLES,                      samples),
 182     __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER,                doubleBufferMode),
 183     __ATTRIB(__DRI_ATTRIB_STEREO,                       stereoMode),
 184     __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS,                  numAuxBuffers),
 185 #if 0
 186     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE,             transparentPixel),
 187     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE,      transparentIndex),
 188     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE,        transparentRed),
 189     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE,      transparentGreen),
 190     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE,       transparentBlue),
 191     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE,      transparentAlpha),
 192     __ATTRIB(__DRI_ATTRIB_RED_MASK,                     redMask),
 193     __ATTRIB(__DRI_ATTRIB_GREEN_MASK,                   greenMask),
 194     __ATTRIB(__DRI_ATTRIB_BLUE_MASK,                    blueMask),
 195     __ATTRIB(__DRI_ATTRIB_ALPHA_MASK,                   alphaMask),
 196 #endif
 197     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH,            maxPbufferWidth),
 198     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT,           maxPbufferHeight),
 199     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS,           maxPbufferPixels),
 200     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH,        optimalPbufferWidth),
 201     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT,       optimalPbufferHeight),
 202 #if 0
 203     __ATTRIB(__DRI_ATTRIB_SWAP_METHOD,                  swapMethod),
 204 #endif
 205     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB,          bindToTextureRgb),
 206     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA,         bindToTextureRgba),
 207     __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,       bindToMipmapTexture),
 208     __ATTRIB(__DRI_ATTRIB_YINVERTED,                    yInverted),
 209 };
 210
 211 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
 212
 213 static int
 214 scalarEqual(__GLcontextModes *mode, unsigned int attrib, unsigned int value)
 215 {
 216     unsigned int glxValue;
 217     int i;
 218
 219     for (i = 0; i < ARRAY_SIZE(attribMap); i++)
 220         if (attribMap[i].attrib == attrib) {
 221             glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
 222             return glxValue == GLX_DONT_CARE || glxValue == value;
 223         }
 224
 225     return GL_TRUE; /* Is a non-existing attribute equal to value? */
 226 }
 227
 228 static int
 229 driConfigEqual(const __DRIcoreExtension *core,
 230                __GLcontextModes *modes, const __DRIconfig *driConfig)
 231 {
 232     unsigned int attrib, value, glxValue;
 233     int i;
 234
 235     i = 0;
 236     while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
 237         switch (attrib) {
 238         case __DRI_ATTRIB_RENDER_TYPE:
 239             glxValue = 0;
 240             if (value & __DRI_ATTRIB_RGBA_BIT) {
 241                 glxValue |= GLX_RGBA_BIT;
 242             } else if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
 243                 glxValue |= GLX_COLOR_INDEX_BIT;
 244             }
 245             if (glxValue != modes->renderType)
 246                 return GL_FALSE;
 247             break;
 248
 249         case __DRI_ATTRIB_CONFIG_CAVEAT:
 250             if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
 251                 glxValue = GLX_NON_CONFORMANT_CONFIG;
 252             else if (value & __DRI_ATTRIB_SLOW_BIT)
 253                 glxValue = GLX_SLOW_CONFIG;
 254             else
 255                 glxValue = GLX_NONE;
 256             if (glxValue != modes->visualRating)
 257                 return GL_FALSE;
 258             break;
 259
 260         case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
 261             glxValue = 0;
 262             if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
 263                 glxValue |= GLX_TEXTURE_1D_BIT_EXT;
 264             if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
 265                 glxValue |= GLX_TEXTURE_2D_BIT_EXT;
 266             if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
 267                 glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
 268             if (modes->bindToTextureTargets != GLX_DONT_CARE &&
 269                 glxValue != modes->bindToTextureTargets)
 270                 return GL_FALSE;
 271             break;
 272
 273         default:
 274             if (!scalarEqual(modes, attrib, value))
 275                 return GL_FALSE;
 276         }
 277     }
 278
 279     return GL_TRUE;
 280 }
 281
 282 static __GLcontextModes *
 283 createDriMode(const __DRIcoreExtension *core,
 284               __GLcontextModes *modes, const __DRIconfig **driConfigs)
 285 {
 286     __GLXDRIconfigPrivate *config;
 287     int i;
 288
 289     for (i = 0; driConfigs[i]; i++) {
 290         if (driConfigEqual(core, modes, driConfigs[i]))
 291             break;
 292     }
 293
 294     if (driConfigs[i] == NULL)
 295         return NULL;
 296
 297     config = Xmalloc(sizeof *config);
 298     if (config == NULL)
 299         return NULL;
 300
 301     config->modes = *modes;
 302     config->driConfig = driConfigs[i];
 303
 304     return &config->modes;
 305 }
 306
 307 _X_HIDDEN __GLcontextModes *
 308 driConvertConfigs(const __DRIcoreExtension *core,
 309                   __GLcontextModes *modes, const __DRIconfig **configs)
 310 {
 311     __GLcontextModes head, *tail, *m;
 312
 313     tail = &head;
 314     head.next = NULL;
 315     for (m = modes; m; m = m->next) {
 316         tail->next = createDriMode(core, m, configs);
 317         if (tail->next == NULL) {
 318             /* no matching dri config for m */
 319             continue;
 320         }
 321
 322
 323         tail = tail->next;
 324     }
 325
 326     _gl_context_modes_destroy(modes);
 327
 328     return head.next;
 329 }
 330
 331 _X_HIDDEN void
 332 driBindExtensions(__GLXscreenConfigs *psc, int dri2)
 333 {
 334     const __DRIextension **extensions;
 335     int i;
 336
 337     extensions = psc->core->getExtensions(psc->__driScreen);
 338
 339     for (i = 0; extensions[i]; i++) {
 340 #ifdef __DRI_COPY_SUB_BUFFER
 341         if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
 342             psc->driCopySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 343             __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
 344         }
 345 #endif
 346
 347 #ifdef __DRI_SWAP_CONTROL
 348         /* No DRI2 support for swap_control at the moment, since SwapBuffers
 349          * is done by the X server */
 350         if (strcmp(extensions[i]->name, __DRI_SWAP_CONTROL) == 0 && !dri2) {
 351             psc->swapControl = (__DRIswapControlExtension *) extensions[i];
 352             __glXEnableDirectExtension(psc, "GLX_SGI_swap_control");
 353             __glXEnableDirectExtension(psc, "GLX_MESA_swap_control");
 354         }
 355 #endif
 356
 357 #ifdef __DRI_ALLOCATE
 358         if (strcmp(extensions[i]->name, __DRI_ALLOCATE) == 0) {
 359             psc->allocate = (__DRIallocateExtension *) extensions[i];
 360             __glXEnableDirectExtension(psc, "GLX_MESA_allocate_memory");
 361         }
 362 #endif
 363
 364 #ifdef __DRI_FRAME_TRACKING
 365         if (strcmp(extensions[i]->name, __DRI_FRAME_TRACKING) == 0) {
 366             psc->frameTracking = (__DRIframeTrackingExtension *) extensions[i];
 367             __glXEnableDirectExtension(psc, "GLX_MESA_swap_frame_usage");
 368         }
 369 #endif
 370
 371 #ifdef __DRI_MEDIA_STREAM_COUNTER
 372         if (strcmp(extensions[i]->name, __DRI_MEDIA_STREAM_COUNTER) == 0) {
 373             psc->msc = (__DRImediaStreamCounterExtension *) extensions[i];
 374             __glXEnableDirectExtension(psc, "GLX_SGI_video_sync");
 375         }
 376 #endif
 377
 378 #ifdef __DRI_SWAP_BUFFER_COUNTER
 379         /* No driver supports this at this time and the extension is
 380          * not defined in dri_interface.h.  Will enable
 381          * GLX_OML_sync_control if implemented. */
 382 #endif
 383
 384 #ifdef __DRI_READ_DRAWABLE
 385         if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {
 386             __glXEnableDirectExtension(psc, "GLX_SGI_make_current_read");
 387         }
 388 #endif
 389
 390 #ifdef __DRI_TEX_BUFFER
 391         if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0) && dri2) {
 392             psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 393             __glXEnableDirectExtension(psc, "GLX_EXT_texture_from_pixmap");
 394         }
 395 #endif
 396
 397 #ifdef __DRI2_FLUSH
 398         if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0) && dri2) {
 399             psc->f = (__DRI2flushExtension *) extensions[i];
 400             /* internal driver extension, no GL extension exposed */
 401         }
 402 #endif
 403
 404         /* Ignore unknown extensions */
 405     }
 406 }
 407
 408 #endif /* GLX_DIRECT_RENDERING */