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 visType       GLX visual type.  Usually either \c GLX_TRUE_COLOR or
 147  *                      \c GLX_DIRECT_COLOR.
 148  *
 149  * \returns
 150  * Pointer to any array of pointers to the \c __DRIconfig structures created
 151  * for the specified formats.  If there is an error, \c NULL is returned.
 152  * Currently the only cause of failure is a bad parameter (i.e., unsupported
 153  * \c format).
 154  */
 155 __DRIconfig **
 156 driCreateConfigs(mesa_format format,
 157                  const uint8_t * depth_bits, const uint8_t * stencil_bits,
 158                  unsigned num_depth_stencil_bits,
 159                  const GLenum * db_modes, unsigned num_db_modes,
 160                  const uint8_t * msaa_samples, unsigned num_msaa_modes,
 161                  GLboolean enable_accum)
 162 {
 163    static const uint32_t masks_table[][4] = {
 164       /* MESA_FORMAT_B5G6R5_UNORM */
 165       { 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 },
 166       /* MESA_FORMAT_B8G8R8X8_UNORM */
 167       { 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 },
 168       /* MESA_FORMAT_B8G8R8A8_UNORM */
 169       { 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 },
 170       /* MESA_FORMAT_B10G10R10X2_UNORM */
 171       { 0x3FF00000, 0x000FFC00, 0x000003FF, 0x00000000 },
 172       /* MESA_FORMAT_B10G10R10A2_UNORM */
 173       { 0x3FF00000, 0x000FFC00, 0x000003FF, 0xC0000000 },
 174    };
 175
 176    const uint32_t * masks;
 177    __DRIconfig **configs, **c;
 178    struct gl_config *modes;
 179    unsigned i, j, k, h;
 180    unsigned num_modes;
 181    unsigned num_accum_bits = (enable_accum) ? 2 : 1;
 182    int red_bits;
 183    int green_bits;
 184    int blue_bits;
 185    int alpha_bits;
 186    bool is_srgb;
 187
 188    switch (format) {
 189    case MESA_FORMAT_B5G6R5_UNORM:
 190       masks = masks_table[0];
 191       break;
 192    case MESA_FORMAT_B8G8R8X8_UNORM:
 193    case MESA_FORMAT_B8G8R8X8_SRGB:
 194       masks = masks_table[1];
 195       break;
 196    case MESA_FORMAT_B8G8R8A8_UNORM:
 197    case MESA_FORMAT_B8G8R8A8_SRGB:
 198       masks = masks_table[2];
 199       break;
 200    case MESA_FORMAT_B10G10R10X2_UNORM:
 201       masks = masks_table[3];
 202       break;
 203    case MESA_FORMAT_B10G10R10A2_UNORM:
 204       masks = masks_table[4];
 205       break;
 206    default:
 207       fprintf(stderr, "[%s:%u] Unknown framebuffer type %s (%d).\n",
 208               __func__, __LINE__,
 209               _mesa_get_format_name(format), format);
 210       return NULL;
 211    }
 212
 213    red_bits = _mesa_get_format_bits(format, GL_RED_BITS);
 214    green_bits = _mesa_get_format_bits(format, GL_GREEN_BITS);
 215    blue_bits = _mesa_get_format_bits(format, GL_BLUE_BITS);
 216    alpha_bits = _mesa_get_format_bits(format, GL_ALPHA_BITS);
 217    is_srgb = _mesa_get_format_color_encoding(format) == GL_SRGB;
 218
 219    num_modes = num_depth_stencil_bits * num_db_modes * num_accum_bits * num_msaa_modes;
 220    configs = calloc(num_modes + 1, sizeof *configs);
 221    if (configs == NULL)
 222        return NULL;
 223
 224     c = configs;
 225     for ( k = 0 ; k < num_depth_stencil_bits ; k++ ) {
 226         for ( i = 0 ; i < num_db_modes ; i++ ) {
 227             for ( h = 0 ; h < num_msaa_modes; h++ ) {
 228                 for ( j = 0 ; j < num_accum_bits ; j++ ) {
 229                     *c = malloc (sizeof **c);
 230                     modes = &(*c)->modes;
 231                     c++;
 232
 233                     memset(modes, 0, sizeof *modes);
 234                     modes->redBits   = red_bits;
 235                     modes->greenBits = green_bits;
 236                     modes->blueBits  = blue_bits;
 237                     modes->alphaBits = alpha_bits;
 238                     modes->redMask   = masks[0];
 239                     modes->greenMask = masks[1];
 240                     modes->blueMask  = masks[2];
 241                     modes->alphaMask = masks[3];
 242                     modes->rgbBits   = modes->redBits + modes->greenBits
 243                         + modes->blueBits + modes->alphaBits;
 244
 245                     modes->accumRedBits   = 16 * j;
 246                     modes->accumGreenBits = 16 * j;
 247                     modes->accumBlueBits  = 16 * j;
 248                     modes->accumAlphaBits = (masks[3] != 0) ? 16 * j : 0;
 249                     modes->visualRating = (j == 0) ? GLX_NONE : GLX_SLOW_CONFIG;
 250
 251                     modes->stencilBits = stencil_bits[k];
 252                     modes->depthBits = depth_bits[k];
 253
 254                     modes->transparentPixel = GLX_NONE;
 255                     modes->transparentRed = GLX_DONT_CARE;
 256                     modes->transparentGreen = GLX_DONT_CARE;
 257                     modes->transparentBlue = GLX_DONT_CARE;
 258                     modes->transparentAlpha = GLX_DONT_CARE;
 259                     modes->transparentIndex = GLX_DONT_CARE;
 260                     modes->rgbMode = GL_TRUE;
 261
 262                     if ( db_modes[i] == GLX_NONE ) {
 263                         modes->doubleBufferMode = GL_FALSE;
 264                     }
 265                     else {
 266                         modes->doubleBufferMode = GL_TRUE;
 267                         modes->swapMethod = db_modes[i];
 268                     }
 269
 270                     modes->samples = msaa_samples[h];
 271                     modes->sampleBuffers = modes->samples ? 1 : 0;
 272
 273
 274                     modes->haveAccumBuffer = ((modes->accumRedBits +
 275                                            modes->accumGreenBits +
 276                                            modes->accumBlueBits +
 277                                            modes->accumAlphaBits) > 0);
 278                     modes->haveDepthBuffer = (modes->depthBits > 0);
 279                     modes->haveStencilBuffer = (modes->stencilBits > 0);
 280
 281                     modes->bindToTextureRgb = GL_TRUE;
 282                     modes->bindToTextureRgba = GL_TRUE;
 283                     modes->bindToMipmapTexture = GL_FALSE;
 284                     modes->bindToTextureTargets =
 285                         __DRI_ATTRIB_TEXTURE_1D_BIT |
 286                         __DRI_ATTRIB_TEXTURE_2D_BIT |
 287                         __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT;
 288
 289                     modes->yInverted = GL_TRUE;
 290                     modes->sRGBCapable = is_srgb;
 291                 }
 292             }
 293         }
 294     }
 295     *c = NULL;
 296
 297     return configs;
 298 }
 299
 300 __DRIconfig **driConcatConfigs(__DRIconfig **a,
 301                                __DRIconfig **b)
 302 {
 303     __DRIconfig **all;
 304     int i, j, index;
 305
 306     if (a == NULL || a[0] == NULL)
 307        return b;
 308     else if (b == NULL || b[0] == NULL)
 309        return a;
 310
 311     i = 0;
 312     while (a[i] != NULL)
 313         i++;
 314     j = 0;
 315     while (b[j] != NULL)
 316         j++;
 317
 318     all = malloc((i + j + 1) * sizeof *all);
 319     index = 0;
 320     for (i = 0; a[i] != NULL; i++)
 321         all[index++] = a[i];
 322     for (j = 0; b[j] != NULL; j++)
 323         all[index++] = b[j];
 324     all[index++] = NULL;
 325
 326     free(a);
 327     free(b);
 328
 329     return all;
 330 }
 331
 332 #define __ATTRIB(attrib, field) \
 333     { attrib, offsetof(struct gl_config, field) }
 334
 335 static const struct { unsigned int attrib, offset; } attribMap[] = {
 336     __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE,                  rgbBits),
 337     __ATTRIB(__DRI_ATTRIB_LEVEL,                        level),
 338     __ATTRIB(__DRI_ATTRIB_RED_SIZE,                     redBits),
 339     __ATTRIB(__DRI_ATTRIB_GREEN_SIZE,                   greenBits),
 340     __ATTRIB(__DRI_ATTRIB_BLUE_SIZE,                    blueBits),
 341     __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE,                   alphaBits),
 342     __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE,                   depthBits),
 343     __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE,                 stencilBits),
 344     __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE,               accumRedBits),
 345     __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE,             accumGreenBits),
 346     __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE,              accumBlueBits),
 347     __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE,             accumAlphaBits),
 348     __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS,               sampleBuffers),
 349     __ATTRIB(__DRI_ATTRIB_SAMPLES,                      samples),
 350     __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER,                doubleBufferMode),
 351     __ATTRIB(__DRI_ATTRIB_STEREO,                       stereoMode),
 352     __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS,                  numAuxBuffers),
 353     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE,             transparentPixel),
 354     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE,      transparentPixel),
 355     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE,        transparentRed),
 356     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE,      transparentGreen),
 357     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE,       transparentBlue),
 358     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE,      transparentAlpha),
 359     __ATTRIB(__DRI_ATTRIB_RED_MASK,                     redMask),
 360     __ATTRIB(__DRI_ATTRIB_GREEN_MASK,                   greenMask),
 361     __ATTRIB(__DRI_ATTRIB_BLUE_MASK,                    blueMask),
 362     __ATTRIB(__DRI_ATTRIB_ALPHA_MASK,                   alphaMask),
 363     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH,            maxPbufferWidth),
 364     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT,           maxPbufferHeight),
 365     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS,           maxPbufferPixels),
 366     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH,        optimalPbufferWidth),
 367     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT,       optimalPbufferHeight),
 368     __ATTRIB(__DRI_ATTRIB_SWAP_METHOD,                  swapMethod),
 369     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB,          bindToTextureRgb),
 370     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA,         bindToTextureRgba),
 371     __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,       bindToMipmapTexture),
 372     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS,      bindToTextureTargets),
 373     __ATTRIB(__DRI_ATTRIB_YINVERTED,                    yInverted),
 374     __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE,     sRGBCapable),
 375
 376     /* The struct field doesn't matter here, these are handled by the
 377      * switch in driGetConfigAttribIndex.  We need them in the array
 378      * so the iterator includes them though.*/
 379     __ATTRIB(__DRI_ATTRIB_RENDER_TYPE,                  level),
 380     __ATTRIB(__DRI_ATTRIB_CONFIG_CAVEAT,                level),
 381     __ATTRIB(__DRI_ATTRIB_SWAP_METHOD,                  level)
 382 };
 383
 384
 385 /**
 386  * Return the value of a configuration attribute.  The attribute is
 387  * indicated by the index.
 388  */
 389 static int
 390 driGetConfigAttribIndex(const __DRIconfig *config,
 391                         unsigned int index, unsigned int *value)
 392 {
 393     switch (attribMap[index].attrib) {
 394     case __DRI_ATTRIB_RENDER_TYPE:
 395         /* no support for color index mode */
 396         *value = __DRI_ATTRIB_RGBA_BIT;
 397         break;
 398     case __DRI_ATTRIB_CONFIG_CAVEAT:
 399         if (config->modes.visualRating == GLX_NON_CONFORMANT_CONFIG)
 400             *value = __DRI_ATTRIB_NON_CONFORMANT_CONFIG;
 401         else if (config->modes.visualRating == GLX_SLOW_CONFIG)
 402             *value = __DRI_ATTRIB_SLOW_BIT;
 403         else
 404             *value = 0;
 405         break;
 406     case __DRI_ATTRIB_SWAP_METHOD:
 407         /* XXX no return value??? */
 408         break;
 409
 410     default:
 411         /* any other int-sized field */
 412         *value = *(unsigned int *)
 413             ((char *) &config->modes + attribMap[index].offset);
 414
 415         break;
 416     }
 417
 418     return GL_TRUE;
 419 }
 420
 421
 422 /**
 423  * Get the value of a configuration attribute.
 424  * \param attrib  the attribute (one of the _DRI_ATTRIB_x tokens)
 425  * \param value  returns the attribute's value
 426  * \return 1 for success, 0 for failure
 427  */
 428 int
 429 driGetConfigAttrib(const __DRIconfig *config,
 430                    unsigned int attrib, unsigned int *value)
 431 {
 432     unsigned i;
 433
 434     for (i = 0; i < ARRAY_SIZE(attribMap); i++)
 435         if (attribMap[i].attrib == attrib)
 436             return driGetConfigAttribIndex(config, i, value);
 437
 438     return GL_FALSE;
 439 }
 440
 441
 442 /**
 443  * Get a configuration attribute name and value, given an index.
 444  * \param index  which field of the __DRIconfig to query
 445  * \param attrib  returns the attribute name (one of the _DRI_ATTRIB_x tokens)
 446  * \param value  returns the attribute's value
 447  * \return 1 for success, 0 for failure
 448  */
 449 int
 450 driIndexConfigAttrib(const __DRIconfig *config, int index,
 451                      unsigned int *attrib, unsigned int *value)
 452 {
 453     if (index >= 0 && index < ARRAY_SIZE(attribMap)) {
 454         *attrib = attribMap[index].attrib;
 455         return driGetConfigAttribIndex(config, index, value);
 456     }
 457
 458     return GL_FALSE;
 459 }
 460
 461 /**
 462  * Implement queries for values that are common across all Mesa drivers
 463  *
 464  * Currently only the following queries are supported by this function:
 465  *
 466  *     - \c __DRI2_RENDERER_VERSION
 467  *     - \c __DRI2_RENDERER_PREFERRED_PROFILE
 468  *     - \c __DRI2_RENDERER_OPENGL_CORE_PROFILE_VERSION
 469  *     - \c __DRI2_RENDERER_OPENGL_COMPATIBLITY_PROFILE_VERSION
 470  *     - \c __DRI2_RENDERER_ES_PROFILE_VERSION
 471  *     - \c __DRI2_RENDERER_ES2_PROFILE_VERSION
 472  *
 473  * \returns
 474  * Zero if a recognized value of \c param is supplied, -1 otherwise.
 475  */
 476 int
 477 driQueryRendererIntegerCommon(__DRIscreen *psp, int param, unsigned int *value)
 478 {
 479    switch (param) {
 480    case __DRI2_RENDERER_VERSION: {
 481       static const char *const ver = PACKAGE_VERSION;
 482       char *endptr;
 483       int v[3];
 484
 485       v[0] = strtol(ver, &endptr, 10);
 486       assert(endptr[0] == '.');
 487       if (endptr[0] != '.')
 488          return -1;
 489
 490       v[1] = strtol(endptr + 1, &endptr, 10);
 491       assert(endptr[0] == '.');
 492       if (endptr[0] != '.')
 493          return -1;
 494
 495       v[2] = strtol(endptr + 1, &endptr, 10);
 496
 497       value[0] = v[0];
 498       value[1] = v[1];
 499       value[2] = v[2];
 500       return 0;
 501    }
 502    case __DRI2_RENDERER_PREFERRED_PROFILE:
 503       value[0] = (psp->max_gl_core_version != 0)
 504          ? (1U << __DRI_API_OPENGL_CORE) : (1U << __DRI_API_OPENGL);
 505       return 0;
 506    case __DRI2_RENDERER_OPENGL_CORE_PROFILE_VERSION:
 507       value[0] = psp->max_gl_core_version / 10;
 508       value[1] = psp->max_gl_core_version % 10;
 509       return 0;
 510    case __DRI2_RENDERER_OPENGL_COMPATIBILITY_PROFILE_VERSION:
 511       value[0] = psp->max_gl_compat_version / 10;
 512       value[1] = psp->max_gl_compat_version % 10;
 513       return 0;
 514    case __DRI2_RENDERER_OPENGL_ES_PROFILE_VERSION:
 515       value[0] = psp->max_gl_es1_version / 10;
 516       value[1] = psp->max_gl_es1_version % 10;
 517       return 0;
 518    case __DRI2_RENDERER_OPENGL_ES2_PROFILE_VERSION:
 519       value[0] = psp->max_gl_es2_version / 10;
 520       value[1] = psp->max_gl_es2_version % 10;
 521       return 0;
 522    default:
 523       break;
 524    }
 525
 526    return -1;
 527 }