src/mesa/drivers/dri/common/utils.c

   1 /*
   2  * (C) Copyright IBM Corporation 2002, 2004
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file utils.c
  27  * Utility functions for DRI drivers.
  28  *
  29  * \author Ian Romanick <idr@us.ibm.com>
  30  */
  31
  32 #include <string.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <stdbool.h>
  36 #include <stdint.h>
  37 #include "main/macros.h"
  38 #include "main/mtypes.h"
  39 #include "main/cpuinfo.h"
  40 #include "main/extensions.h"
  41 #include "utils.h"
  42 #include "dri_util.h"
  43
  44 /**
  45  * Create the \c GL_RENDERER string for DRI drivers.
  46  *
  47  * Almost all DRI drivers use a \c GL_RENDERER string of the form:
  48  *
  49  *    "Mesa DRI <chip> <driver date> <AGP speed) <CPU information>"
  50  *
  51  * Using the supplied chip name, driver data, and AGP speed, this function
  52  * creates the string.
  53  *
  54  * \param buffer         Buffer to hold the \c GL_RENDERER string.
  55  * \param hardware_name  Name of the hardware.
  56  * \param agp_mode       AGP mode (speed).
  57  *
  58  * \returns
  59  * The length of the string stored in \c buffer.  This does \b not include
  60  * the terminating \c NUL character.
  61  */
  62 unsigned
  63 driGetRendererString( char * buffer, const char * hardware_name,
  64                       GLuint agp_mode )
  65 {
  66    unsigned offset;
  67    char *cpu;
  68
  69    offset = sprintf( buffer, "Mesa DRI %s", hardware_name );
  70
  71    /* Append any AGP-specific information.
  72     */
  73    switch ( agp_mode ) {
  74    case 1:
  75    case 2:
  76    case 4:
  77    case 8:
  78       offset += sprintf( & buffer[ offset ], " AGP %ux", agp_mode );
  79       break;
  80
  81    default:
  82       break;
  83    }
  84
  85    /* Append any CPU-specific information.
  86     */
  87    cpu = _mesa_get_cpu_string();
  88    if (cpu) {
  89       offset += sprintf(buffer + offset, " %s", cpu);
  90       free(cpu);
  91    }
  92
  93    return offset;
  94 }
  95
  96
  97 /**
  98  * Creates a set of \c struct gl_config that a driver will expose.
  99  *
 100  * A set of \c struct gl_config will be created based on the supplied
 101  * parameters.  The number of modes processed will be 2 *
 102  * \c num_depth_stencil_bits * \c num_db_modes.
 103  *
 104  * For the most part, data is just copied from \c depth_bits, \c stencil_bits,
 105  * \c db_modes, and \c visType into each \c struct gl_config element.
 106  * However, the meanings of \c fb_format and \c fb_type require further
 107  * explanation.  The \c fb_format specifies which color components are in
 108  * each pixel and what the default order is.  For example, \c GL_RGB specifies
 109  * that red, green, blue are available and red is in the "most significant"
 110  * position and blue is in the "least significant".  The \c fb_type specifies
 111  * the bit sizes of each component and the actual ordering.  For example, if
 112  * \c GL_UNSIGNED_SHORT_5_6_5_REV is specified with \c GL_RGB, bits [15:11]
 113  * are the blue value, bits [10:5] are the green value, and bits [4:0] are
 114  * the red value.
 115  *
 116  * One sublte issue is the combination of \c GL_RGB  or \c GL_BGR and either
 117  * of the \c GL_UNSIGNED_INT_8_8_8_8 modes.  The resulting mask values in the
 118  * \c struct gl_config structure is \b identical to the \c GL_RGBA or
 119  * \c GL_BGRA case, except the \c alphaMask is zero.  This means that, as
 120  * far as this routine is concerned, \c GL_RGB with \c GL_UNSIGNED_INT_8_8_8_8
 121  * still uses 32-bits.
 122  *
 123  * If in doubt, look at the tables used in the function.
 124  *
 125  * \param ptr_to_modes  Pointer to a pointer to a linked list of
 126  *                      \c struct gl_config.  Upon completion, a pointer to
 127  *                      the next element to be process will be stored here.
 128  *                      If the function fails and returns \c GL_FALSE, this
 129  *                      value will be unmodified, but some elements in the
 130  *                      linked list may be modified.
 131  * \param format        Mesa mesa_format enum describing the pixel format
 132  * \param depth_bits    Array of depth buffer sizes to be exposed.
 133  * \param stencil_bits  Array of stencil buffer sizes to be exposed.
 134  * \param num_depth_stencil_bits  Number of entries in both \c depth_bits and
 135  *                      \c stencil_bits.
 136  * \param db_modes      Array of buffer swap modes.  If an element has a
 137  *                      value of \c GLX_NONE, then it represents a
 138  *                      single-buffered mode.  Other valid values are
 139  *                      \c GLX_SWAP_EXCHANGE_OML, \c GLX_SWAP_COPY_OML, and
 140  *                      \c GLX_SWAP_UNDEFINED_OML.  See the
 141  *                      GLX_OML_swap_method extension spec for more details.
 142  * \param num_db_modes  Number of entries in \c db_modes.
 143  * \param msaa_samples  Array of msaa sample count. 0 represents a visual
 144  *                      without a multisample buffer.
 145  * \param num_msaa_modes Number of entries in \c msaa_samples.
 146  * \param enable_accum  Add an accum buffer to the configs
 147  * \param color_depth_match Whether the color depth must match the zs depth
 148  *                          This forces 32-bit color to have 24-bit depth, and
 149  *                          16-bit color to have 16-bit depth.
 150  * \param mutable_render_buffer Enable __DRI_ATTRIB_MUTABLE_RENDER_BUFFER,
 151  *                              which translates to
 152  *                              EGL_MUTABLE_RENDER_BUFFER_BIT_KHR.
 153  *
 154  * \returns
 155  * Pointer to any array of pointers to the \c __DRIconfig structures created
 156  * for the specified formats.  If there is an error, \c NULL is returned.
 157  * Currently the only cause of failure is a bad parameter (i.e., unsupported
 158  * \c format).
 159  */
 160 __DRIconfig **
 161 driCreateConfigs(mesa_format format,
 162                  const uint8_t * depth_bits, const uint8_t * stencil_bits,
 163                  unsigned num_depth_stencil_bits,
 164                  const GLenum * db_modes, unsigned num_db_modes,
 165                  const uint8_t * msaa_samples, unsigned num_msaa_modes,
 166                  GLboolean enable_accum, GLboolean color_depth_match,
 167                  GLboolean mutable_render_buffer)
 168 {
 169    static const uint32_t masks_table[][4] = {
 170       /* MESA_FORMAT_B5G6R5_UNORM */
 171       { 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 },
 172       /* MESA_FORMAT_B8G8R8X8_UNORM */
 173       { 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 },
 174       /* MESA_FORMAT_B8G8R8A8_UNORM */
 175       { 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 },
 176       /* MESA_FORMAT_B10G10R10X2_UNORM */
 177       { 0x3FF00000, 0x000FFC00, 0x000003FF, 0x00000000 },
 178       /* MESA_FORMAT_B10G10R10A2_UNORM */
 179       { 0x3FF00000, 0x000FFC00, 0x000003FF, 0xC0000000 },
 180       /* MESA_FORMAT_R8G8B8A8_UNORM */
 181       { 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 },
 182       /* MESA_FORMAT_R8G8B8X8_UNORM */
 183       { 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000 },
 184       /* MESA_FORMAT_R10G10B10X2_UNORM */
 185       { 0x000003FF, 0x000FFC00, 0x3FF00000, 0x00000000 },
 186       /* MESA_FORMAT_R10G10B10A2_UNORM */
 187       { 0x000003FF, 0x000FFC00, 0x3FF00000, 0xC0000000 },
 188    };
 189
 190    const uint32_t * masks;
 191    __DRIconfig **configs, **c;
 192    struct gl_config *modes;
 193    unsigned i, j, k, h;
 194    unsigned num_modes;
 195    unsigned num_accum_bits = (enable_accum) ? 2 : 1;
 196    int red_bits;
 197    int green_bits;
 198    int blue_bits;
 199    int alpha_bits;
 200    bool is_srgb;
 201
 202    switch (format) {
 203    case MESA_FORMAT_B5G6R5_UNORM:
 204       masks = masks_table[0];
 205       break;
 206    case MESA_FORMAT_B8G8R8X8_UNORM:
 207    case MESA_FORMAT_B8G8R8X8_SRGB:
 208       masks = masks_table[1];
 209       break;
 210    case MESA_FORMAT_B8G8R8A8_UNORM:
 211    case MESA_FORMAT_B8G8R8A8_SRGB:
 212       masks = masks_table[2];
 213       break;
 214    case MESA_FORMAT_R8G8B8A8_UNORM:
 215    case MESA_FORMAT_R8G8B8A8_SRGB:
 216       masks = masks_table[5];
 217       break;
 218    case MESA_FORMAT_R8G8B8X8_UNORM:
 219       masks = masks_table[6];
 220       break;
 221    case MESA_FORMAT_B10G10R10X2_UNORM:
 222       masks = masks_table[3];
 223       break;
 224    case MESA_FORMAT_B10G10R10A2_UNORM:
 225       masks = masks_table[4];
 226       break;
 227    case MESA_FORMAT_R10G10B10X2_UNORM:
 228       masks = masks_table[7];
 229       break;
 230    case MESA_FORMAT_R10G10B10A2_UNORM:
 231       masks = masks_table[8];
 232       break;
 233    default:
 234       fprintf(stderr, "[%s:%u] Unknown framebuffer type %s (%d).\n",
 235               __func__, __LINE__,
 236               _mesa_get_format_name(format), format);
 237       return NULL;
 238    }
 239
 240    red_bits = _mesa_get_format_bits(format, GL_RED_BITS);
 241    green_bits = _mesa_get_format_bits(format, GL_GREEN_BITS);
 242    blue_bits = _mesa_get_format_bits(format, GL_BLUE_BITS);
 243    alpha_bits = _mesa_get_format_bits(format, GL_ALPHA_BITS);
 244    is_srgb = _mesa_get_format_color_encoding(format) == GL_SRGB;
 245
 246    num_modes = num_depth_stencil_bits * num_db_modes * num_accum_bits * num_msaa_modes;
 247    configs = calloc(num_modes + 1, sizeof *configs);
 248    if (configs == NULL)
 249        return NULL;
 250
 251     c = configs;
 252     for ( k = 0 ; k < num_depth_stencil_bits ; k++ ) {
 253         for ( i = 0 ; i < num_db_modes ; i++ ) {
 254             for ( h = 0 ; h < num_msaa_modes; h++ ) {
 255                 for ( j = 0 ; j < num_accum_bits ; j++ ) {
 256                     if (color_depth_match &&
 257                         (depth_bits[k] || stencil_bits[k])) {
 258                         /* Depth can really only be 0, 16, 24, or 32. A 32-bit
 259                          * color format still matches 24-bit depth, as there
 260                          * is an implicit 8-bit stencil. So really we just
 261                          * need to make sure that color/depth are both 16 or
 262                          * both non-16.
 263                          */
 264                         if ((depth_bits[k] + stencil_bits[k] == 16) !=
 265                             (red_bits + green_bits + blue_bits + alpha_bits == 16))
 266                             continue;
 267                     }
 268
 269                     *c = malloc (sizeof **c);
 270                     modes = &(*c)->modes;
 271                     c++;
 272
 273                     memset(modes, 0, sizeof *modes);
 274                     modes->redBits   = red_bits;
 275                     modes->greenBits = green_bits;
 276                     modes->blueBits  = blue_bits;
 277                     modes->alphaBits = alpha_bits;
 278                     modes->redMask   = masks[0];
 279                     modes->greenMask = masks[1];
 280                     modes->blueMask  = masks[2];
 281                     modes->alphaMask = masks[3];
 282                     modes->rgbBits   = modes->redBits + modes->greenBits
 283                         + modes->blueBits + modes->alphaBits;
 284
 285                     modes->accumRedBits   = 16 * j;
 286                     modes->accumGreenBits = 16 * j;
 287                     modes->accumBlueBits  = 16 * j;
 288                     modes->accumAlphaBits = (masks[3] != 0) ? 16 * j : 0;
 289                     modes->visualRating = (j == 0) ? GLX_NONE : GLX_SLOW_CONFIG;
 290
 291                     modes->stencilBits = stencil_bits[k];
 292                     modes->depthBits = depth_bits[k];
 293
 294                     modes->transparentPixel = GLX_NONE;
 295                     modes->transparentRed = GLX_DONT_CARE;
 296                     modes->transparentGreen = GLX_DONT_CARE;
 297                     modes->transparentBlue = GLX_DONT_CARE;
 298                     modes->transparentAlpha = GLX_DONT_CARE;
 299                     modes->transparentIndex = GLX_DONT_CARE;
 300                     modes->rgbMode = GL_TRUE;
 301
 302                     if (db_modes[i] == __DRI_ATTRIB_SWAP_NONE) {
 303                         modes->doubleBufferMode = GL_FALSE;
 304                         modes->swapMethod = __DRI_ATTRIB_SWAP_UNDEFINED;
 305                     }
 306                     else {
 307                         modes->doubleBufferMode = GL_TRUE;
 308                         modes->swapMethod = db_modes[i];
 309                     }
 310
 311                     modes->samples = msaa_samples[h];
 312                     modes->sampleBuffers = modes->samples ? 1 : 0;
 313
 314
 315                     modes->haveAccumBuffer = ((modes->accumRedBits +
 316                                            modes->accumGreenBits +
 317                                            modes->accumBlueBits +
 318                                            modes->accumAlphaBits) > 0);
 319                     modes->haveDepthBuffer = (modes->depthBits > 0);
 320                     modes->haveStencilBuffer = (modes->stencilBits > 0);
 321
 322                     modes->bindToTextureRgb = GL_TRUE;
 323                     modes->bindToTextureRgba = GL_TRUE;
 324                     modes->bindToMipmapTexture = GL_FALSE;
 325                     modes->bindToTextureTargets =
 326                         __DRI_ATTRIB_TEXTURE_1D_BIT |
 327                         __DRI_ATTRIB_TEXTURE_2D_BIT |
 328                         __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT;
 329
 330                     modes->yInverted = GL_TRUE;
 331                     modes->sRGBCapable = is_srgb;
 332                     modes->mutableRenderBuffer = mutable_render_buffer;
 333                 }
 334             }
 335         }
 336     }
 337     *c = NULL;
 338
 339     return configs;
 340 }
 341
 342 __DRIconfig **driConcatConfigs(__DRIconfig **a,
 343                                __DRIconfig **b)
 344 {
 345     __DRIconfig **all;
 346     int i, j, index;
 347
 348     if (a == NULL || a[0] == NULL)
 349        return b;
 350     else if (b == NULL || b[0] == NULL)
 351        return a;
 352
 353     i = 0;
 354     while (a[i] != NULL)
 355         i++;
 356     j = 0;
 357     while (b[j] != NULL)
 358         j++;
 359
 360     all = malloc((i + j + 1) * sizeof *all);
 361     index = 0;
 362     for (i = 0; a[i] != NULL; i++)
 363         all[index++] = a[i];
 364     for (j = 0; b[j] != NULL; j++)
 365         all[index++] = b[j];
 366     all[index++] = NULL;
 367
 368     free(a);
 369     free(b);
 370
 371     return all;
 372 }
 373
 374 #define __ATTRIB(attrib, field) \
 375     { attrib, offsetof(struct gl_config, field) }
 376
 377 static const struct { unsigned int attrib, offset; } attribMap[] = {
 378     __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE,                  rgbBits),
 379     __ATTRIB(__DRI_ATTRIB_LEVEL,                        level),
 380     __ATTRIB(__DRI_ATTRIB_RED_SIZE,                     redBits),
 381     __ATTRIB(__DRI_ATTRIB_GREEN_SIZE,                   greenBits),
 382     __ATTRIB(__DRI_ATTRIB_BLUE_SIZE,                    blueBits),
 383     __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE,                   alphaBits),
 384     __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE,                   depthBits),
 385     __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE,                 stencilBits),
 386     __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE,               accumRedBits),
 387     __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE,             accumGreenBits),
 388     __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE,              accumBlueBits),
 389     __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE,             accumAlphaBits),
 390     __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS,               sampleBuffers),
 391     __ATTRIB(__DRI_ATTRIB_SAMPLES,                      samples),
 392     __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER,                doubleBufferMode),
 393     __ATTRIB(__DRI_ATTRIB_STEREO,                       stereoMode),
 394     __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS,                  numAuxBuffers),
 395     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE,             transparentPixel),
 396     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE,      transparentPixel),
 397     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE,        transparentRed),
 398     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE,      transparentGreen),
 399     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE,       transparentBlue),
 400     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE,      transparentAlpha),
 401     __ATTRIB(__DRI_ATTRIB_RED_MASK,                     redMask),
 402     __ATTRIB(__DRI_ATTRIB_GREEN_MASK,                   greenMask),
 403     __ATTRIB(__DRI_ATTRIB_BLUE_MASK,                    blueMask),
 404     __ATTRIB(__DRI_ATTRIB_ALPHA_MASK,                   alphaMask),
 405     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH,            maxPbufferWidth),
 406     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT,           maxPbufferHeight),
 407     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS,           maxPbufferPixels),
 408     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH,        optimalPbufferWidth),
 409     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT,       optimalPbufferHeight),
 410     __ATTRIB(__DRI_ATTRIB_SWAP_METHOD,                  swapMethod),
 411     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB,          bindToTextureRgb),
 412     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA,         bindToTextureRgba),
 413     __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,       bindToMipmapTexture),
 414     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS,      bindToTextureTargets),
 415     __ATTRIB(__DRI_ATTRIB_YINVERTED,                    yInverted),
 416     __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE,     sRGBCapable),
 417     __ATTRIB(__DRI_ATTRIB_MUTABLE_RENDER_BUFFER,        mutableRenderBuffer),
 418
 419     /* The struct field doesn't matter here, these are handled by the
 420      * switch in driGetConfigAttribIndex.  We need them in the array
 421      * so the iterator includes them though.*/
 422     __ATTRIB(__DRI_ATTRIB_RENDER_TYPE,                  level),
 423     __ATTRIB(__DRI_ATTRIB_CONFIG_CAVEAT,                level),
 424 };
 425
 426
 427 /**
 428  * Return the value of a configuration attribute.  The attribute is
 429  * indicated by the index.
 430  */
 431 static int
 432 driGetConfigAttribIndex(const __DRIconfig *config,
 433                         unsigned int index, unsigned int *value)
 434 {
 435     switch (attribMap[index].attrib) {
 436     case __DRI_ATTRIB_RENDER_TYPE:
 437         /* no support for color index mode */
 438         *value = __DRI_ATTRIB_RGBA_BIT;
 439         break;
 440     case __DRI_ATTRIB_CONFIG_CAVEAT:
 441         if (config->modes.visualRating == GLX_NON_CONFORMANT_CONFIG)
 442             *value = __DRI_ATTRIB_NON_CONFORMANT_CONFIG;
 443         else if (config->modes.visualRating == GLX_SLOW_CONFIG)
 444             *value = __DRI_ATTRIB_SLOW_BIT;
 445         else
 446             *value = 0;
 447         break;
 448     default:
 449         /* any other int-sized field */
 450         *value = *(unsigned int *)
 451             ((char *) &config->modes + attribMap[index].offset);
 452
 453         break;
 454     }
 455
 456     return GL_TRUE;
 457 }
 458
 459
 460 /**
 461  * Get the value of a configuration attribute.
 462  * \param attrib  the attribute (one of the _DRI_ATTRIB_x tokens)
 463  * \param value  returns the attribute's value
 464  * \return 1 for success, 0 for failure
 465  */
 466 int
 467 driGetConfigAttrib(const __DRIconfig *config,
 468                    unsigned int attrib, unsigned int *value)
 469 {
 470     unsigned i;
 471
 472     for (i = 0; i < ARRAY_SIZE(attribMap); i++)
 473         if (attribMap[i].attrib == attrib)
 474             return driGetConfigAttribIndex(config, i, value);
 475
 476     return GL_FALSE;
 477 }
 478
 479
 480 /**
 481  * Get a configuration attribute name and value, given an index.
 482  * \param index  which field of the __DRIconfig to query
 483  * \param attrib  returns the attribute name (one of the _DRI_ATTRIB_x tokens)
 484  * \param value  returns the attribute's value
 485  * \return 1 for success, 0 for failure
 486  */
 487 int
 488 driIndexConfigAttrib(const __DRIconfig *config, int index,
 489                      unsigned int *attrib, unsigned int *value)
 490 {
 491     if (index >= 0 && index < ARRAY_SIZE(attribMap)) {
 492         *attrib = attribMap[index].attrib;
 493         return driGetConfigAttribIndex(config, index, value);
 494     }
 495
 496     return GL_FALSE;
 497 }
 498
 499 /**
 500  * Implement queries for values that are common across all Mesa drivers
 501  *
 502  * Currently only the following queries are supported by this function:
 503  *
 504  *     - \c __DRI2_RENDERER_VERSION
 505  *     - \c __DRI2_RENDERER_PREFERRED_PROFILE
 506  *     - \c __DRI2_RENDERER_OPENGL_CORE_PROFILE_VERSION
 507  *     - \c __DRI2_RENDERER_OPENGL_COMPATIBLITY_PROFILE_VERSION
 508  *     - \c __DRI2_RENDERER_ES_PROFILE_VERSION
 509  *     - \c __DRI2_RENDERER_ES2_PROFILE_VERSION
 510  *
 511  * \returns
 512  * Zero if a recognized value of \c param is supplied, -1 otherwise.
 513  */
 514 int
 515 driQueryRendererIntegerCommon(__DRIscreen *psp, int param, unsigned int *value)
 516 {
 517    switch (param) {
 518    case __DRI2_RENDERER_VERSION: {
 519       static const char *const ver = PACKAGE_VERSION;
 520       char *endptr;
 521       int v[3];
 522
 523       v[0] = strtol(ver, &endptr, 10);
 524       assert(endptr[0] == '.');
 525       if (endptr[0] != '.')
 526          return -1;
 527
 528       v[1] = strtol(endptr + 1, &endptr, 10);
 529       assert(endptr[0] == '.');
 530       if (endptr[0] != '.')
 531          return -1;
 532
 533       v[2] = strtol(endptr + 1, &endptr, 10);
 534
 535       value[0] = v[0];
 536       value[1] = v[1];
 537       value[2] = v[2];
 538       return 0;
 539    }
 540    case __DRI2_RENDERER_PREFERRED_PROFILE:
 541       value[0] = (psp->max_gl_core_version != 0)
 542          ? (1U << __DRI_API_OPENGL_CORE) : (1U << __DRI_API_OPENGL);
 543       return 0;
 544    case __DRI2_RENDERER_OPENGL_CORE_PROFILE_VERSION:
 545       value[0] = psp->max_gl_core_version / 10;
 546       value[1] = psp->max_gl_core_version % 10;
 547       return 0;
 548    case __DRI2_RENDERER_OPENGL_COMPATIBILITY_PROFILE_VERSION:
 549       value[0] = psp->max_gl_compat_version / 10;
 550       value[1] = psp->max_gl_compat_version % 10;
 551       return 0;
 552    case __DRI2_RENDERER_OPENGL_ES_PROFILE_VERSION:
 553       value[0] = psp->max_gl_es1_version / 10;
 554       value[1] = psp->max_gl_es1_version % 10;
 555       return 0;
 556    case __DRI2_RENDERER_OPENGL_ES2_PROFILE_VERSION:
 557       value[0] = psp->max_gl_es2_version / 10;
 558       value[1] = psp->max_gl_es2_version % 10;
 559       return 0;
 560    default:
 561       break;
 562    }
 563
 564    return -1;
 565 }