src/glx/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 #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
  52 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
  69 ErrorMessageF(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 *
 100 driOpenDriver(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
 161 static 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
 180 static 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
 227 static int
 228 scalarEqual(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
 242 static int
 243 driConfigEqual(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
 297 static struct glx_config *
 298 createDriMode(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 *
 323 driConvertConfigs(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
 347 driDestroyConfigs(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 *
 357 driFetchDrawable(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
 384 driReleaseDrawables(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
 400    if (gc->currentDrawable != gc->currentReadable &&
 401        __glxHashLookup(priv->drawHash,
 402                        gc->currentReadable, (void *) &pdraw) == 0) {
 403       if (pdraw->drawable == pdraw->xDrawable) {
 404          (*pdraw->destroyDrawable)(pdraw);
 405          __glxHashDelete(priv->drawHash, gc->currentReadable);
 406       }
 407    }
 408 }
 409
 410 #endif /* GLX_DIRECT_RENDERING */