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 "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
  53 InfoMessageF(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
  70 ErrorMessageF(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 *
 101 driOpenDriver(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 static 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(__GLcontextModes, field) }
 180
 181 static 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
 228 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
 229
 230 static int
 231 scalarEqual(__GLcontextModes * mode, unsigned int attrib, unsigned int value)
 232 {
 233    unsigned int glxValue;
 234    int i;
 235
 236    for (i = 0; i < ARRAY_SIZE(attribMap); i++)
 237       if (attribMap[i].attrib == attrib) {
 238          glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
 239          return glxValue == GLX_DONT_CARE || glxValue == value;
 240       }
 241
 242    return GL_TRUE;              /* Is a non-existing attribute equal to value? */
 243 }
 244
 245 static int
 246 driConfigEqual(const __DRIcoreExtension * core,
 247                __GLcontextModes * modes, const __DRIconfig * driConfig)
 248 {
 249    unsigned int attrib, value, glxValue;
 250    int i;
 251
 252    i = 0;
 253    while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
 254       switch (attrib) {
 255       case __DRI_ATTRIB_RENDER_TYPE:
 256          glxValue = 0;
 257          if (value & __DRI_ATTRIB_RGBA_BIT) {
 258             glxValue |= GLX_RGBA_BIT;
 259          }
 260          else if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
 261             glxValue |= GLX_COLOR_INDEX_BIT;
 262          }
 263          if (glxValue != modes->renderType)
 264             return GL_FALSE;
 265          break;
 266
 267       case __DRI_ATTRIB_CONFIG_CAVEAT:
 268          if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
 269             glxValue = GLX_NON_CONFORMANT_CONFIG;
 270          else if (value & __DRI_ATTRIB_SLOW_BIT)
 271             glxValue = GLX_SLOW_CONFIG;
 272          else
 273             glxValue = GLX_NONE;
 274          if (glxValue != modes->visualRating)
 275             return GL_FALSE;
 276          break;
 277
 278       case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
 279          glxValue = 0;
 280          if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
 281             glxValue |= GLX_TEXTURE_1D_BIT_EXT;
 282          if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
 283             glxValue |= GLX_TEXTURE_2D_BIT_EXT;
 284          if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
 285             glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
 286          if (modes->bindToTextureTargets != GLX_DONT_CARE &&
 287              glxValue != modes->bindToTextureTargets)
 288             return GL_FALSE;
 289          break;
 290
 291       default:
 292          if (!scalarEqual(modes, attrib, value))
 293             return GL_FALSE;
 294       }
 295    }
 296
 297    return GL_TRUE;
 298 }
 299
 300 static __GLcontextModes *
 301 createDriMode(const __DRIcoreExtension * core,
 302               __GLcontextModes * modes, const __DRIconfig ** driConfigs)
 303 {
 304    __GLXDRIconfigPrivate *config;
 305    int i;
 306
 307    for (i = 0; driConfigs[i]; i++) {
 308       if (driConfigEqual(core, modes, driConfigs[i]))
 309          break;
 310    }
 311
 312    if (driConfigs[i] == NULL)
 313       return NULL;
 314
 315    config = Xmalloc(sizeof *config);
 316    if (config == NULL)
 317       return NULL;
 318
 319    config->modes = *modes;
 320    config->driConfig = driConfigs[i];
 321
 322    return &config->modes;
 323 }
 324
 325 _X_HIDDEN __GLcontextModes *
 326 driConvertConfigs(const __DRIcoreExtension * core,
 327                   __GLcontextModes * modes, const __DRIconfig ** configs)
 328 {
 329    __GLcontextModes head, *tail, *m;
 330
 331    tail = &head;
 332    head.next = NULL;
 333    for (m = modes; m; m = m->next) {
 334       tail->next = createDriMode(core, m, configs);
 335       if (tail->next == NULL) {
 336          /* no matching dri config for m */
 337          continue;
 338       }
 339
 340
 341       tail = tail->next;
 342    }
 343
 344    _gl_context_modes_destroy(modes);
 345
 346    return head.next;
 347 }
 348
 349 _X_HIDDEN void
 350 driDestroyConfigs(const __DRIconfig **configs)
 351 {
 352    int i;
 353
 354    for (i = 0; configs[i]; i++)
 355       free((__DRIconfig *) configs[i]);
 356    free(configs);
 357 }
 358
 359 #endif /* GLX_DIRECT_RENDERING */