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 /* WARNING: HACK: Local defines to avoid pulling glx.h.
  45  *
  46  * Any parts of this file that use the following defines are either partial or
  47  * entirely broken wrt EGL.
  48  *
  49  * For example any getConfigAttrib() or indexConfigAttrib() query from EGL for
  50  * SLOW or NON_CONFORMANT_CONFIG will not work as expected since the EGL tokens
  51  * are different from the GLX ones.
  52  */
  53 #define GLX_NONE                                                0x8000
  54 #define GLX_SLOW_CONFIG                                         0x8001
  55 #define GLX_NON_CONFORMANT_CONFIG                               0x800D
  56 #define GLX_DONT_CARE                                           0xFFFFFFFF
  57
  58 /**
  59  * Create the \c GL_RENDERER string for DRI drivers.
  60  *
  61  * Almost all DRI drivers use a \c GL_RENDERER string of the form:
  62  *
  63  *    "Mesa DRI <chip> <driver date> <AGP speed) <CPU information>"
  64  *
  65  * Using the supplied chip name, driver data, and AGP speed, this function
  66  * creates the string.
  67  *
  68  * \param buffer         Buffer to hold the \c GL_RENDERER string.
  69  * \param hardware_name  Name of the hardware.
  70  * \param agp_mode       AGP mode (speed).
  71  *
  72  * \returns
  73  * The length of the string stored in \c buffer.  This does \b not include
  74  * the terminating \c NUL character.
  75  */
  76 unsigned
  77 driGetRendererString( char * buffer, const char * hardware_name,
  78                       GLuint agp_mode )
  79 {
  80    unsigned offset;
  81    char *cpu;
  82
  83    offset = sprintf( buffer, "Mesa DRI %s", hardware_name );
  84
  85    /* Append any AGP-specific information.
  86     */
  87    switch ( agp_mode ) {
  88    case 1:
  89    case 2:
  90    case 4:
  91    case 8:
  92       offset += sprintf( & buffer[ offset ], " AGP %ux", agp_mode );
  93       break;
  94
  95    default:
  96       break;
  97    }
  98
  99    /* Append any CPU-specific information.
 100     */
 101    cpu = _mesa_get_cpu_string();
 102    if (cpu) {
 103       offset += sprintf(buffer + offset, " %s", cpu);
 104       free(cpu);
 105    }
 106
 107    return offset;
 108 }
 109
 110
 111 /**
 112  * Creates a set of \c struct gl_config that a driver will expose.
 113  *
 114  * A set of \c struct gl_config will be created based on the supplied
 115  * parameters.  The number of modes processed will be 2 *
 116  * \c num_depth_stencil_bits * \c num_db_modes.
 117  *
 118  * For the most part, data is just copied from \c depth_bits, \c stencil_bits,
 119  * \c db_modes, and \c visType into each \c struct gl_config element.
 120  * However, the meanings of \c fb_format and \c fb_type require further
 121  * explanation.  The \c fb_format specifies which color components are in
 122  * each pixel and what the default order is.  For example, \c GL_RGB specifies
 123  * that red, green, blue are available and red is in the "most significant"
 124  * position and blue is in the "least significant".  The \c fb_type specifies
 125  * the bit sizes of each component and the actual ordering.  For example, if
 126  * \c GL_UNSIGNED_SHORT_5_6_5_REV is specified with \c GL_RGB, bits [15:11]
 127  * are the blue value, bits [10:5] are the green value, and bits [4:0] are
 128  * the red value.
 129  *
 130  * One sublte issue is the combination of \c GL_RGB  or \c GL_BGR and either
 131  * of the \c GL_UNSIGNED_INT_8_8_8_8 modes.  The resulting mask values in the
 132  * \c struct gl_config structure is \b identical to the \c GL_RGBA or
 133  * \c GL_BGRA case, except the \c alphaMask is zero.  This means that, as
 134  * far as this routine is concerned, \c GL_RGB with \c GL_UNSIGNED_INT_8_8_8_8
 135  * still uses 32-bits.
 136  *
 137  * If in doubt, look at the tables used in the function.
 138  *
 139  * \param ptr_to_modes  Pointer to a pointer to a linked list of
 140  *                      \c struct gl_config.  Upon completion, a pointer to
 141  *                      the next element to be process will be stored here.
 142  *                      If the function fails and returns \c GL_FALSE, this
 143  *                      value will be unmodified, but some elements in the
 144  *                      linked list may be modified.
 145  * \param format        Mesa mesa_format enum describing the pixel format
 146  * \param depth_bits    Array of depth buffer sizes to be exposed.
 147  * \param stencil_bits  Array of stencil buffer sizes to be exposed.
 148  * \param num_depth_stencil_bits  Number of entries in both \c depth_bits and
 149  *                      \c stencil_bits.
 150  * \param db_modes      Array of buffer swap modes.  If an element has a
 151  *                      value of \c __DRI_ATTRIB_SWAP_NONE, then it
 152  *                      represents a single-buffered mode.  Other valid
 153  *                      values are \c __DRI_ATTRIB_SWAP_EXCHANGE,
 154  *                      \c __DRI_ATTRIB_SWAP_COPY, and \c __DRI_ATTRIB_SWAP_UNDEFINED.
 155  *                      They represent the respective GLX values as in
 156  *                      the GLX_OML_swap_method extension spec.
 157  * \param num_db_modes  Number of entries in \c db_modes.
 158  * \param msaa_samples  Array of msaa sample count. 0 represents a visual
 159  *                      without a multisample buffer.
 160  * \param num_msaa_modes Number of entries in \c msaa_samples.
 161  * \param enable_accum  Add an accum buffer to the configs
 162  * \param color_depth_match Whether the color depth must match the zs depth
 163  *                          This forces 32-bit color to have 24-bit depth, and
 164  *                          16-bit color to have 16-bit depth.
 165  * \param mutable_render_buffer Enable __DRI_ATTRIB_MUTABLE_RENDER_BUFFER,
 166  *                              which translates to
 167  *                              EGL_MUTABLE_RENDER_BUFFER_BIT_KHR.
 168  *
 169  * \returns
 170  * Pointer to any array of pointers to the \c __DRIconfig structures created
 171  * for the specified formats.  If there is an error, \c NULL is returned.
 172  * Currently the only cause of failure is a bad parameter (i.e., unsupported
 173  * \c format).
 174  */
 175 __DRIconfig **
 176 driCreateConfigs(mesa_format format,
 177                  const uint8_t * depth_bits, const uint8_t * stencil_bits,
 178                  unsigned num_depth_stencil_bits,
 179                  const GLenum * db_modes, unsigned num_db_modes,
 180                  const uint8_t * msaa_samples, unsigned num_msaa_modes,
 181                  GLboolean enable_accum, GLboolean color_depth_match,
 182                  GLboolean mutable_render_buffer)
 183 {
 184    static const uint32_t masks_table[][4] = {
 185       /* MESA_FORMAT_B5G6R5_UNORM */
 186       { 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 },
 187       /* MESA_FORMAT_B8G8R8X8_UNORM */
 188       { 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 },
 189       /* MESA_FORMAT_B8G8R8A8_UNORM */
 190       { 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 },
 191       /* MESA_FORMAT_B10G10R10X2_UNORM */
 192       { 0x3FF00000, 0x000FFC00, 0x000003FF, 0x00000000 },
 193       /* MESA_FORMAT_B10G10R10A2_UNORM */
 194       { 0x3FF00000, 0x000FFC00, 0x000003FF, 0xC0000000 },
 195       /* MESA_FORMAT_R8G8B8A8_UNORM */
 196       { 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 },
 197       /* MESA_FORMAT_R8G8B8X8_UNORM */
 198       { 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000 },
 199       /* MESA_FORMAT_R10G10B10X2_UNORM */
 200       { 0x000003FF, 0x000FFC00, 0x3FF00000, 0x00000000 },
 201       /* MESA_FORMAT_R10G10B10A2_UNORM */
 202       { 0x000003FF, 0x000FFC00, 0x3FF00000, 0xC0000000 },
 203    };
 204
 205    const uint32_t * masks;
 206    __DRIconfig **configs, **c;
 207    struct gl_config *modes;
 208    unsigned i, j, k, h;
 209    unsigned num_modes;
 210    unsigned num_accum_bits = (enable_accum) ? 2 : 1;
 211    int red_bits;
 212    int green_bits;
 213    int blue_bits;
 214    int alpha_bits;
 215    bool is_srgb;
 216
 217    switch (format) {
 218    case MESA_FORMAT_B5G6R5_UNORM:
 219       masks = masks_table[0];
 220       break;
 221    case MESA_FORMAT_B8G8R8X8_UNORM:
 222    case MESA_FORMAT_B8G8R8X8_SRGB:
 223       masks = masks_table[1];
 224       break;
 225    case MESA_FORMAT_B8G8R8A8_UNORM:
 226    case MESA_FORMAT_B8G8R8A8_SRGB:
 227       masks = masks_table[2];
 228       break;
 229    case MESA_FORMAT_R8G8B8A8_UNORM:
 230    case MESA_FORMAT_R8G8B8A8_SRGB:
 231       masks = masks_table[5];
 232       break;
 233    case MESA_FORMAT_R8G8B8X8_UNORM:
 234       masks = masks_table[6];
 235       break;
 236    case MESA_FORMAT_B10G10R10X2_UNORM:
 237       masks = masks_table[3];
 238       break;
 239    case MESA_FORMAT_B10G10R10A2_UNORM:
 240       masks = masks_table[4];
 241       break;
 242    case MESA_FORMAT_R10G10B10X2_UNORM:
 243       masks = masks_table[7];
 244       break;
 245    case MESA_FORMAT_R10G10B10A2_UNORM:
 246       masks = masks_table[8];
 247       break;
 248    default:
 249       fprintf(stderr, "[%s:%u] Unknown framebuffer type %s (%d).\n",
 250               __func__, __LINE__,
 251               _mesa_get_format_name(format), format);
 252       return NULL;
 253    }
 254
 255    red_bits = _mesa_get_format_bits(format, GL_RED_BITS);
 256    green_bits = _mesa_get_format_bits(format, GL_GREEN_BITS);
 257    blue_bits = _mesa_get_format_bits(format, GL_BLUE_BITS);
 258    alpha_bits = _mesa_get_format_bits(format, GL_ALPHA_BITS);
 259    is_srgb = _mesa_get_format_color_encoding(format) == GL_SRGB;
 260
 261    num_modes = num_depth_stencil_bits * num_db_modes * num_accum_bits * num_msaa_modes;
 262    configs = calloc(num_modes + 1, sizeof *configs);
 263    if (configs == NULL)
 264        return NULL;
 265
 266     c = configs;
 267     for ( k = 0 ; k < num_depth_stencil_bits ; k++ ) {
 268         for ( i = 0 ; i < num_db_modes ; i++ ) {
 269             for ( h = 0 ; h < num_msaa_modes; h++ ) {
 270                 for ( j = 0 ; j < num_accum_bits ; j++ ) {
 271                     if (color_depth_match &&
 272                         (depth_bits[k] || stencil_bits[k])) {
 273                         /* Depth can really only be 0, 16, 24, or 32. A 32-bit
 274                          * color format still matches 24-bit depth, as there
 275                          * is an implicit 8-bit stencil. So really we just
 276                          * need to make sure that color/depth are both 16 or
 277                          * both non-16.
 278                          */
 279                         if ((depth_bits[k] + stencil_bits[k] == 16) !=
 280                             (red_bits + green_bits + blue_bits + alpha_bits == 16))
 281                             continue;
 282                     }
 283
 284                     *c = malloc (sizeof **c);
 285                     modes = &(*c)->modes;
 286                     c++;
 287
 288                     memset(modes, 0, sizeof *modes);
 289                     modes->redBits   = red_bits;
 290                     modes->greenBits = green_bits;
 291                     modes->blueBits  = blue_bits;
 292                     modes->alphaBits = alpha_bits;
 293                     modes->redMask   = masks[0];
 294                     modes->greenMask = masks[1];
 295                     modes->blueMask  = masks[2];
 296                     modes->alphaMask = masks[3];
 297                     modes->rgbBits   = modes->redBits + modes->greenBits
 298                         + modes->blueBits + modes->alphaBits;
 299
 300                     modes->accumRedBits   = 16 * j;
 301                     modes->accumGreenBits = 16 * j;
 302                     modes->accumBlueBits  = 16 * j;
 303                     modes->accumAlphaBits = (masks[3] != 0) ? 16 * j : 0;
 304                     modes->visualRating = (j == 0) ? GLX_NONE : GLX_SLOW_CONFIG;
 305
 306                     modes->stencilBits = stencil_bits[k];
 307                     modes->depthBits = depth_bits[k];
 308
 309                     modes->transparentPixel = GLX_NONE;
 310                     modes->transparentRed = GLX_DONT_CARE;
 311                     modes->transparentGreen = GLX_DONT_CARE;
 312                     modes->transparentBlue = GLX_DONT_CARE;
 313                     modes->transparentAlpha = GLX_DONT_CARE;
 314                     modes->transparentIndex = GLX_DONT_CARE;
 315                     modes->rgbMode = GL_TRUE;
 316
 317                     if (db_modes[i] == __DRI_ATTRIB_SWAP_NONE) {
 318                         modes->doubleBufferMode = GL_FALSE;
 319                         modes->swapMethod = __DRI_ATTRIB_SWAP_UNDEFINED;
 320                     }
 321                     else {
 322                         modes->doubleBufferMode = GL_TRUE;
 323                         modes->swapMethod = db_modes[i];
 324                     }
 325
 326                     modes->samples = msaa_samples[h];
 327                     modes->sampleBuffers = modes->samples ? 1 : 0;
 328
 329
 330                     modes->haveAccumBuffer = ((modes->accumRedBits +
 331                                            modes->accumGreenBits +
 332                                            modes->accumBlueBits +
 333                                            modes->accumAlphaBits) > 0);
 334                     modes->haveDepthBuffer = (modes->depthBits > 0);
 335                     modes->haveStencilBuffer = (modes->stencilBits > 0);
 336
 337                     modes->bindToTextureRgb = GL_TRUE;
 338                     modes->bindToTextureRgba = GL_TRUE;
 339                     modes->bindToMipmapTexture = GL_FALSE;
 340                     modes->bindToTextureTargets =
 341                         __DRI_ATTRIB_TEXTURE_1D_BIT |
 342                         __DRI_ATTRIB_TEXTURE_2D_BIT |
 343                         __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT;
 344
 345                     modes->yInverted = GL_TRUE;
 346                     modes->sRGBCapable = is_srgb;
 347                     modes->mutableRenderBuffer = mutable_render_buffer;
 348                 }
 349             }
 350         }
 351     }
 352     *c = NULL;
 353
 354     return configs;
 355 }
 356
 357 __DRIconfig **driConcatConfigs(__DRIconfig **a,
 358                                __DRIconfig **b)
 359 {
 360     __DRIconfig **all;
 361     int i, j, index;
 362
 363     if (a == NULL || a[0] == NULL)
 364        return b;
 365     else if (b == NULL || b[0] == NULL)
 366        return a;
 367
 368     i = 0;
 369     while (a[i] != NULL)
 370         i++;
 371     j = 0;
 372     while (b[j] != NULL)
 373         j++;
 374
 375     all = malloc((i + j + 1) * sizeof *all);
 376     index = 0;
 377     for (i = 0; a[i] != NULL; i++)
 378         all[index++] = a[i];
 379     for (j = 0; b[j] != NULL; j++)
 380         all[index++] = b[j];
 381     all[index++] = NULL;
 382
 383     free(a);
 384     free(b);
 385
 386     return all;
 387 }
 388
 389 #define __ATTRIB(attrib, field) \
 390     { attrib, offsetof(struct gl_config, field) }
 391
 392 static const struct { unsigned int attrib, offset; } attribMap[] = {
 393     __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE,                  rgbBits),
 394     __ATTRIB(__DRI_ATTRIB_LEVEL,                        level),
 395     __ATTRIB(__DRI_ATTRIB_RED_SIZE,                     redBits),
 396     __ATTRIB(__DRI_ATTRIB_GREEN_SIZE,                   greenBits),
 397     __ATTRIB(__DRI_ATTRIB_BLUE_SIZE,                    blueBits),
 398     __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE,                   alphaBits),
 399     __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE,                   depthBits),
 400     __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE,                 stencilBits),
 401     __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE,               accumRedBits),
 402     __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE,             accumGreenBits),
 403     __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE,              accumBlueBits),
 404     __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE,             accumAlphaBits),
 405     __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS,               sampleBuffers),
 406     __ATTRIB(__DRI_ATTRIB_SAMPLES,                      samples),
 407     __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER,                doubleBufferMode),
 408     __ATTRIB(__DRI_ATTRIB_STEREO,                       stereoMode),
 409     __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS,                  numAuxBuffers),
 410     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE,             transparentPixel),
 411     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE,      transparentPixel),
 412     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE,        transparentRed),
 413     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE,      transparentGreen),
 414     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE,       transparentBlue),
 415     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE,      transparentAlpha),
 416     __ATTRIB(__DRI_ATTRIB_RED_MASK,                     redMask),
 417     __ATTRIB(__DRI_ATTRIB_GREEN_MASK,                   greenMask),
 418     __ATTRIB(__DRI_ATTRIB_BLUE_MASK,                    blueMask),
 419     __ATTRIB(__DRI_ATTRIB_ALPHA_MASK,                   alphaMask),
 420     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH,            maxPbufferWidth),
 421     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT,           maxPbufferHeight),
 422     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS,           maxPbufferPixels),
 423     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH,        optimalPbufferWidth),
 424     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT,       optimalPbufferHeight),
 425     __ATTRIB(__DRI_ATTRIB_SWAP_METHOD,                  swapMethod),
 426     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB,          bindToTextureRgb),
 427     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA,         bindToTextureRgba),
 428     __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,       bindToMipmapTexture),
 429     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS,      bindToTextureTargets),
 430     __ATTRIB(__DRI_ATTRIB_YINVERTED,                    yInverted),
 431     __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE,     sRGBCapable),
 432     __ATTRIB(__DRI_ATTRIB_MUTABLE_RENDER_BUFFER,        mutableRenderBuffer),
 433
 434     /* The struct field doesn't matter here, these are handled by the
 435      * switch in driGetConfigAttribIndex.  We need them in the array
 436      * so the iterator includes them though.*/
 437     __ATTRIB(__DRI_ATTRIB_RENDER_TYPE,                  level),
 438     __ATTRIB(__DRI_ATTRIB_CONFIG_CAVEAT,                level),
 439 };
 440
 441
 442 /**
 443  * Return the value of a configuration attribute.  The attribute is
 444  * indicated by the index.
 445  */
 446 static int
 447 driGetConfigAttribIndex(const __DRIconfig *config,
 448                         unsigned int index, unsigned int *value)
 449 {
 450     switch (attribMap[index].attrib) {
 451     case __DRI_ATTRIB_RENDER_TYPE:
 452         /* no support for color index mode */
 453         *value = __DRI_ATTRIB_RGBA_BIT;
 454         break;
 455     case __DRI_ATTRIB_CONFIG_CAVEAT:
 456         if (config->modes.visualRating == GLX_NON_CONFORMANT_CONFIG)
 457             *value = __DRI_ATTRIB_NON_CONFORMANT_CONFIG;
 458         else if (config->modes.visualRating == GLX_SLOW_CONFIG)
 459             *value = __DRI_ATTRIB_SLOW_BIT;
 460         else
 461             *value = 0;
 462         break;
 463     default:
 464         /* any other int-sized field */
 465         *value = *(unsigned int *)
 466             ((char *) &config->modes + attribMap[index].offset);
 467
 468         break;
 469     }
 470
 471     return GL_TRUE;
 472 }
 473
 474
 475 /**
 476  * Get the value of a configuration attribute.
 477  * \param attrib  the attribute (one of the _DRI_ATTRIB_x tokens)
 478  * \param value  returns the attribute's value
 479  * \return 1 for success, 0 for failure
 480  */
 481 int
 482 driGetConfigAttrib(const __DRIconfig *config,
 483                    unsigned int attrib, unsigned int *value)
 484 {
 485     unsigned i;
 486
 487     for (i = 0; i < ARRAY_SIZE(attribMap); i++)
 488         if (attribMap[i].attrib == attrib)
 489             return driGetConfigAttribIndex(config, i, value);
 490
 491     return GL_FALSE;
 492 }
 493
 494
 495 /**
 496  * Get a configuration attribute name and value, given an index.
 497  * \param index  which field of the __DRIconfig to query
 498  * \param attrib  returns the attribute name (one of the _DRI_ATTRIB_x tokens)
 499  * \param value  returns the attribute's value
 500  * \return 1 for success, 0 for failure
 501  */
 502 int
 503 driIndexConfigAttrib(const __DRIconfig *config, int index,
 504                      unsigned int *attrib, unsigned int *value)
 505 {
 506     if (index >= 0 && index < ARRAY_SIZE(attribMap)) {
 507         *attrib = attribMap[index].attrib;
 508         return driGetConfigAttribIndex(config, index, value);
 509     }
 510
 511     return GL_FALSE;
 512 }
 513
 514 /**
 515  * Implement queries for values that are common across all Mesa drivers
 516  *
 517  * Currently only the following queries are supported by this function:
 518  *
 519  *     - \c __DRI2_RENDERER_VERSION
 520  *     - \c __DRI2_RENDERER_PREFERRED_PROFILE
 521  *     - \c __DRI2_RENDERER_OPENGL_CORE_PROFILE_VERSION
 522  *     - \c __DRI2_RENDERER_OPENGL_COMPATIBLITY_PROFILE_VERSION
 523  *     - \c __DRI2_RENDERER_ES_PROFILE_VERSION
 524  *     - \c __DRI2_RENDERER_ES2_PROFILE_VERSION
 525  *
 526  * \returns
 527  * Zero if a recognized value of \c param is supplied, -1 otherwise.
 528  */
 529 int
 530 driQueryRendererIntegerCommon(__DRIscreen *psp, int param, unsigned int *value)
 531 {
 532    switch (param) {
 533    case __DRI2_RENDERER_VERSION: {
 534       static const char *const ver = PACKAGE_VERSION;
 535       char *endptr;
 536       int v[3];
 537
 538       v[0] = strtol(ver, &endptr, 10);
 539       assert(endptr[0] == '.');
 540       if (endptr[0] != '.')
 541          return -1;
 542
 543       v[1] = strtol(endptr + 1, &endptr, 10);
 544       assert(endptr[0] == '.');
 545       if (endptr[0] != '.')
 546          return -1;
 547
 548       v[2] = strtol(endptr + 1, &endptr, 10);
 549
 550       value[0] = v[0];
 551       value[1] = v[1];
 552       value[2] = v[2];
 553       return 0;
 554    }
 555    case __DRI2_RENDERER_PREFERRED_PROFILE:
 556       value[0] = (psp->max_gl_core_version != 0)
 557          ? (1U << __DRI_API_OPENGL_CORE) : (1U << __DRI_API_OPENGL);
 558       return 0;
 559    case __DRI2_RENDERER_OPENGL_CORE_PROFILE_VERSION:
 560       value[0] = psp->max_gl_core_version / 10;
 561       value[1] = psp->max_gl_core_version % 10;
 562       return 0;
 563    case __DRI2_RENDERER_OPENGL_COMPATIBILITY_PROFILE_VERSION:
 564       value[0] = psp->max_gl_compat_version / 10;
 565       value[1] = psp->max_gl_compat_version % 10;
 566       return 0;
 567    case __DRI2_RENDERER_OPENGL_ES_PROFILE_VERSION:
 568       value[0] = psp->max_gl_es1_version / 10;
 569       value[1] = psp->max_gl_es1_version % 10;
 570       return 0;
 571    case __DRI2_RENDERER_OPENGL_ES2_PROFILE_VERSION:
 572       value[0] = psp->max_gl_es2_version / 10;
 573       value[1] = psp->max_gl_es2_version % 10;
 574       return 0;
 575    default:
 576       break;
 577    }
 578
 579    return -1;
 580 }