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 (at) us.ibm.com> 30 */ 31 32 #include <string.h> 33 #include <stdlib.h> 34 #include "main/mtypes.h" 35 #include "main/cpuinfo.h" 36 #include "main/extensions.h" 37 #include "utils.h" 38 39 40 unsigned 41 driParseDebugString( const char * debug, 42 const struct dri_debug_control * control ) 43 { 44 unsigned flag; 45 46 47 flag = 0; 48 if ( debug != NULL ) { 49 while( control->string != NULL ) { 50 if ( !strcmp( debug, "all" ) || 51 strstr( debug, control->string ) != NULL ) { 52 flag |= control->flag; 53 } 54 55 control++; 56 } 57 } 58 59 return flag; 60 } 61 62 63 64 /** 65 * Create the \c GL_RENDERER string for DRI drivers. 66 * 67 * Almost all DRI drivers use a \c GL_RENDERER string of the form: 68 * 69 * "Mesa DRI <chip> <driver date> <AGP speed) <CPU information>" 70 * 71 * Using the supplied chip name, driver data, and AGP speed, this function 72 * creates the string. 73 * 74 * \param buffer Buffer to hold the \c GL_RENDERER string. 75 * \param hardware_name Name of the hardware. 76 * \param agp_mode AGP mode (speed). 77 * 78 * \returns 79 * The length of the string stored in \c buffer. This does \b not include 80 * the terminating \c NUL character. 81 */ 82 unsigned 83 driGetRendererString( char * buffer, const char * hardware_name, 84 GLuint agp_mode ) 85 { 86 unsigned offset; 87 char *cpu; 88 89 offset = sprintf( buffer, "Mesa DRI %s", hardware_name ); 90 91 /* Append any AGP-specific information. 92 */ 93 switch ( agp_mode ) { 94 case 1: 95 case 2: 96 case 4: 97 case 8: 98 offset += sprintf( & buffer[ offset ], " AGP %ux", agp_mode ); 99 break; 100 101 default: 102 break; 103 } 104 105 /* Append any CPU-specific information. 106 */ 107 cpu = _mesa_get_cpu_string(); 108 if (cpu) { 109 offset += sprintf(buffer + offset, " %s", cpu); 110 free(cpu); 111 } 112 113 return offset; 114 } 115 116 117 /** 118 * Creates a set of \c struct gl_config that a driver will expose. 119 * 120 * A set of \c struct gl_config will be created based on the supplied 121 * parameters. The number of modes processed will be 2 * 122 * \c num_depth_stencil_bits * \c num_db_modes. 123 * 124 * For the most part, data is just copied from \c depth_bits, \c stencil_bits, 125 * \c db_modes, and \c visType into each \c struct gl_config element. 126 * However, the meanings of \c fb_format and \c fb_type require further 127 * explanation. The \c fb_format specifies which color components are in 128 * each pixel and what the default order is. For example, \c GL_RGB specifies 129 * that red, green, blue are available and red is in the "most significant" 130 * position and blue is in the "least significant". The \c fb_type specifies 131 * the bit sizes of each component and the actual ordering. For example, if 132 * \c GL_UNSIGNED_SHORT_5_6_5_REV is specified with \c GL_RGB, bits [15:11] 133 * are the blue value, bits [10:5] are the green value, and bits [4:0] are 134 * the red value. 135 * 136 * One sublte issue is the combination of \c GL_RGB or \c GL_BGR and either 137 * of the \c GL_UNSIGNED_INT_8_8_8_8 modes. The resulting mask values in the 138 * \c struct gl_config structure is \b identical to the \c GL_RGBA or 139 * \c GL_BGRA case, except the \c alphaMask is zero. This means that, as 140 * far as this routine is concerned, \c GL_RGB with \c GL_UNSIGNED_INT_8_8_8_8 141 * still uses 32-bits. 142 * 143 * If in doubt, look at the tables used in the function. 144 * 145 * \param ptr_to_modes Pointer to a pointer to a linked list of 146 * \c struct gl_config. Upon completion, a pointer to 147 * the next element to be process will be stored here. 148 * If the function fails and returns \c GL_FALSE, this 149 * value will be unmodified, but some elements in the 150 * linked list may be modified. 151 * \param fb_format Format of the framebuffer. Currently only \c GL_RGB, 152 * \c GL_RGBA, \c GL_BGR, and \c GL_BGRA are supported. 153 * \param fb_type Type of the pixels in the framebuffer. Currently only 154 * \c GL_UNSIGNED_SHORT_5_6_5, 155 * \c GL_UNSIGNED_SHORT_5_6_5_REV, 156 * \c GL_UNSIGNED_INT_8_8_8_8, and 157 * \c GL_UNSIGNED_INT_8_8_8_8_REV are supported. 158 * \param depth_bits Array of depth buffer sizes to be exposed. 159 * \param stencil_bits Array of stencil buffer sizes to be exposed. 160 * \param num_depth_stencil_bits Number of entries in both \c depth_bits and 161 * \c stencil_bits. 162 * \param db_modes Array of buffer swap modes. If an element has a 163 * value of \c GLX_NONE, then it represents a 164 * single-buffered mode. Other valid values are 165 * \c GLX_SWAP_EXCHANGE_OML, \c GLX_SWAP_COPY_OML, and 166 * \c GLX_SWAP_UNDEFINED_OML. See the 167 * GLX_OML_swap_method extension spec for more details. 168 * \param num_db_modes Number of entries in \c db_modes. 169 * \param msaa_samples Array of msaa sample count. 0 represents a visual 170 * without a multisample buffer. 171 * \param num_msaa_modes Number of entries in \c msaa_samples. 172 * \param visType GLX visual type. Usually either \c GLX_TRUE_COLOR or 173 * \c GLX_DIRECT_COLOR. 174 * 175 * \returns 176 * \c GL_TRUE on success or \c GL_FALSE on failure. Currently the only 177 * cause of failure is a bad parameter (i.e., unsupported \c fb_format or 178 * \c fb_type). 179 * 180 * \todo 181 * There is currently no way to support packed RGB modes (i.e., modes with 182 * exactly 3 bytes per pixel) or floating-point modes. This could probably 183 * be done by creating some new, private enums with clever names likes 184 * \c GL_UNSIGNED_3BYTE_8_8_8, \c GL_4FLOAT_32_32_32_32, 185 * \c GL_4HALF_16_16_16_16, etc. We can cross that bridge when we come to it. 186 */ 187 __DRIconfig ** 188 driCreateConfigs(GLenum fb_format, GLenum fb_type, 189 const uint8_t * depth_bits, const uint8_t * stencil_bits, 190 unsigned num_depth_stencil_bits, 191 const GLenum * db_modes, unsigned num_db_modes, 192 const uint8_t * msaa_samples, unsigned num_msaa_modes, 193 GLboolean enable_accum) 194 { 195 static const uint8_t bits_table[4][4] = { 196 /* R G B A */ 197 { 3, 3, 2, 0 }, /* Any GL_UNSIGNED_BYTE_3_3_2 */ 198 { 5, 6, 5, 0 }, /* Any GL_UNSIGNED_SHORT_5_6_5 */ 199 { 8, 8, 8, 0 }, /* Any RGB with any GL_UNSIGNED_INT_8_8_8_8 */ 200 { 8, 8, 8, 8 } /* Any RGBA with any GL_UNSIGNED_INT_8_8_8_8 */ 201 }; 202 203 static const uint32_t masks_table_rgb[6][4] = { 204 { 0x000000E0, 0x0000001C, 0x00000003, 0x00000000 }, /* 3_3_2 */ 205 { 0x00000007, 0x00000038, 0x000000C0, 0x00000000 }, /* 2_3_3_REV */ 206 { 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 }, /* 5_6_5 */ 207 { 0x0000001F, 0x000007E0, 0x0000F800, 0x00000000 }, /* 5_6_5_REV */ 208 { 0xFF000000, 0x00FF0000, 0x0000FF00, 0x00000000 }, /* 8_8_8_8 */ 209 { 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000 } /* 8_8_8_8_REV */ 210 }; 211 212 static const uint32_t masks_table_rgba[6][4] = { 213 { 0x000000E0, 0x0000001C, 0x00000003, 0x00000000 }, /* 3_3_2 */ 214 { 0x00000007, 0x00000038, 0x000000C0, 0x00000000 }, /* 2_3_3_REV */ 215 { 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 }, /* 5_6_5 */ 216 { 0x0000001F, 0x000007E0, 0x0000F800, 0x00000000 }, /* 5_6_5_REV */ 217 { 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF }, /* 8_8_8_8 */ 218 { 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 }, /* 8_8_8_8_REV */ 219 }; 220 221 static const uint32_t masks_table_bgr[6][4] = { 222 { 0x00000007, 0x00000038, 0x000000C0, 0x00000000 }, /* 3_3_2 */ 223 { 0x000000E0, 0x0000001C, 0x00000003, 0x00000000 }, /* 2_3_3_REV */ 224 { 0x0000001F, 0x000007E0, 0x0000F800, 0x00000000 }, /* 5_6_5 */ 225 { 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 }, /* 5_6_5_REV */ 226 { 0x0000FF00, 0x00FF0000, 0xFF000000, 0x00000000 }, /* 8_8_8_8 */ 227 { 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 }, /* 8_8_8_8_REV */ 228 }; 229 230 static const uint32_t masks_table_bgra[6][4] = { 231 { 0x00000007, 0x00000038, 0x000000C0, 0x00000000 }, /* 3_3_2 */ 232 { 0x000000E0, 0x0000001C, 0x00000003, 0x00000000 }, /* 2_3_3_REV */ 233 { 0x0000001F, 0x000007E0, 0x0000F800, 0x00000000 }, /* 5_6_5 */ 234 { 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 }, /* 5_6_5_REV */ 235 { 0x0000FF00, 0x00FF0000, 0xFF000000, 0x000000FF }, /* 8_8_8_8 */ 236 { 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 }, /* 8_8_8_8_REV */ 237 }; 238 239 static const uint8_t bytes_per_pixel[6] = { 240 1, /* 3_3_2 */ 241 1, /* 2_3_3_REV */ 242 2, /* 5_6_5 */ 243 2, /* 5_6_5_REV */ 244 4, /* 8_8_8_8 */ 245 4 /* 8_8_8_8_REV */ 246 }; 247 248 const uint8_t * bits; 249 const uint32_t * masks; 250 int index; 251 __DRIconfig **configs, **c; 252 struct gl_config *modes; 253 unsigned i, j, k, h; 254 unsigned num_modes; 255 unsigned num_accum_bits = (enable_accum) ? 2 : 1; 256 257 switch ( fb_type ) { 258 case GL_UNSIGNED_BYTE_3_3_2: 259 index = 0; 260 break; 261 case GL_UNSIGNED_BYTE_2_3_3_REV: 262 index = 1; 263 break; 264 case GL_UNSIGNED_SHORT_5_6_5: 265 index = 2; 266 break; 267 case GL_UNSIGNED_SHORT_5_6_5_REV: 268 index = 3; 269 break; 270 case GL_UNSIGNED_INT_8_8_8_8: 271 index = 4; 272 break; 273 case GL_UNSIGNED_INT_8_8_8_8_REV: 274 index = 5; 275 break; 276 default: 277 fprintf( stderr, "[%s:%u] Unknown framebuffer type 0x%04x.\n", 278 __FUNCTION__, __LINE__, fb_type ); 279 return NULL; 280 } 281 282 283 /* Valid types are GL_UNSIGNED_SHORT_5_6_5 and GL_UNSIGNED_INT_8_8_8_8 and 284 * the _REV versions. 285 * 286 * Valid formats are GL_RGBA, GL_RGB, and GL_BGRA. 287 */ 288 289 switch ( fb_format ) { 290 case GL_RGB: 291 masks = masks_table_rgb[ index ]; 292 break; 293 294 case GL_RGBA: 295 masks = masks_table_rgba[ index ]; 296 break; 297 298 case GL_BGR: 299 masks = masks_table_bgr[ index ]; 300 break; 301 302 case GL_BGRA: 303 masks = masks_table_bgra[ index ]; 304 break; 305 306 default: 307 fprintf( stderr, "[%s:%u] Unknown framebuffer format 0x%04x.\n", 308 __FUNCTION__, __LINE__, fb_format ); 309 return NULL; 310 } 311 312 switch ( bytes_per_pixel[ index ] ) { 313 case 1: 314 bits = bits_table[0]; 315 break; 316 case 2: 317 bits = bits_table[1]; 318 break; 319 default: 320 bits = ((fb_format == GL_RGB) || (fb_format == GL_BGR)) 321 ? bits_table[2] 322 : bits_table[3]; 323 break; 324 } 325 326 num_modes = num_depth_stencil_bits * num_db_modes * num_accum_bits * num_msaa_modes; 327 configs = calloc(1, (num_modes + 1) * sizeof *configs); 328 if (configs == NULL) 329 return NULL; 330 331 c = configs; 332 for ( k = 0 ; k < num_depth_stencil_bits ; k++ ) { 333 for ( i = 0 ; i < num_db_modes ; i++ ) { 334 for ( h = 0 ; h < num_msaa_modes; h++ ) { 335 for ( j = 0 ; j < num_accum_bits ; j++ ) { 336 *c = malloc (sizeof **c); 337 modes = &(*c)->modes; 338 c++; 339 340 memset(modes, 0, sizeof *modes); 341 modes->redBits = bits[0]; 342 modes->greenBits = bits[1]; 343 modes->blueBits = bits[2]; 344 modes->alphaBits = bits[3]; 345 modes->redMask = masks[0]; 346 modes->greenMask = masks[1]; 347 modes->blueMask = masks[2]; 348 modes->alphaMask = masks[3]; 349 modes->rgbBits = modes->redBits + modes->greenBits 350 + modes->blueBits + modes->alphaBits; 351 352 modes->accumRedBits = 16 * j; 353 modes->accumGreenBits = 16 * j; 354 modes->accumBlueBits = 16 * j; 355 modes->accumAlphaBits = (masks[3] != 0) ? 16 * j : 0; 356 modes->visualRating = (j == 0) ? GLX_NONE : GLX_SLOW_CONFIG; 357 358 modes->stencilBits = stencil_bits[k]; 359 modes->depthBits = depth_bits[k]; 360 361 modes->transparentPixel = GLX_NONE; 362 modes->transparentRed = GLX_DONT_CARE; 363 modes->transparentGreen = GLX_DONT_CARE; 364 modes->transparentBlue = GLX_DONT_CARE; 365 modes->transparentAlpha = GLX_DONT_CARE; 366 modes->transparentIndex = GLX_DONT_CARE; 367 modes->rgbMode = GL_TRUE; 368 369 if ( db_modes[i] == GLX_NONE ) { 370 modes->doubleBufferMode = GL_FALSE; 371 } 372 else { 373 modes->doubleBufferMode = GL_TRUE; 374 modes->swapMethod = db_modes[i]; 375 } 376 377 modes->samples = msaa_samples[h]; 378 modes->sampleBuffers = modes->samples ? 1 : 0; 379 380 381 modes->haveAccumBuffer = ((modes->accumRedBits + 382 modes->accumGreenBits + 383 modes->accumBlueBits + 384 modes->accumAlphaBits) > 0); 385 modes->haveDepthBuffer = (modes->depthBits > 0); 386 modes->haveStencilBuffer = (modes->stencilBits > 0); 387 388 modes->bindToTextureRgb = GL_TRUE; 389 modes->bindToTextureRgba = GL_TRUE; 390 modes->bindToMipmapTexture = GL_FALSE; 391 modes->bindToTextureTargets = 392 __DRI_ATTRIB_TEXTURE_1D_BIT | 393 __DRI_ATTRIB_TEXTURE_2D_BIT | 394 __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT; 395 396 modes->sRGBCapable = GL_FALSE; 397 } 398 } 399 } 400 } 401 *c = NULL; 402 403 return configs; 404 } 405 406 __DRIconfig **driConcatConfigs(__DRIconfig **a, 407 __DRIconfig **b) 408 { 409 __DRIconfig **all; 410 int i, j, index; 411 412 if (a == NULL || a[0] == NULL) 413 return b; 414 else if (b == NULL || b[0] == NULL) 415 return a; 416 417 i = 0; 418 while (a[i] != NULL) 419 i++; 420 j = 0; 421 while (b[j] != NULL) 422 j++; 423 424 all = malloc((i + j + 1) * sizeof *all); 425 index = 0; 426 for (i = 0; a[i] != NULL; i++) 427 all[index++] = a[i]; 428 for (j = 0; b[j] != NULL; j++) 429 all[index++] = b[j]; 430 all[index++] = NULL; 431 432 free(a); 433 free(b); 434 435 return all; 436 } 437 438 #define __ATTRIB(attrib, field) \ 439 { attrib, offsetof(struct gl_config, field) } 440 441 static const struct { unsigned int attrib, offset; } attribMap[] = { 442 __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits), 443 __ATTRIB(__DRI_ATTRIB_LEVEL, level), 444 __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits), 445 __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits), 446 __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits), 447 __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits), 448 __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits), 449 __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits), 450 __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits), 451 __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits), 452 __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits), 453 __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits), 454 __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers), 455 __ATTRIB(__DRI_ATTRIB_SAMPLES, samples), 456 __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode), 457 __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode), 458 __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers), 459 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel), 460 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentPixel), 461 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed), 462 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen), 463 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue), 464 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha), 465 __ATTRIB(__DRI_ATTRIB_FLOAT_MODE, floatMode), 466 __ATTRIB(__DRI_ATTRIB_RED_MASK, redMask), 467 __ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask), 468 __ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask), 469 __ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask), 470 __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth), 471 __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight), 472 __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels), 473 __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth), 474 __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight), 475 __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod), 476 __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb), 477 __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba), 478 __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE, bindToMipmapTexture), 479 __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS, bindToTextureTargets), 480 __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted), 481 __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable), 482 483 /* The struct field doesn't matter here, these are handled by the 484 * switch in driGetConfigAttribIndex. We need them in the array 485 * so the iterator includes them though.*/ 486 __ATTRIB(__DRI_ATTRIB_RENDER_TYPE, level), 487 __ATTRIB(__DRI_ATTRIB_CONFIG_CAVEAT, level), 488 __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, level) 489 }; 490 491 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 492 493 494 /** 495 * Return the value of a configuration attribute. The attribute is 496 * indicated by the index. 497 */ 498 static int 499 driGetConfigAttribIndex(const __DRIconfig *config, 500 unsigned int index, unsigned int *value) 501 { 502 switch (attribMap[index].attrib) { 503 case __DRI_ATTRIB_RENDER_TYPE: 504 /* no support for color index mode */ 505 *value = __DRI_ATTRIB_RGBA_BIT; 506 break; 507 case __DRI_ATTRIB_CONFIG_CAVEAT: 508 if (config->modes.visualRating == GLX_NON_CONFORMANT_CONFIG) 509 *value = __DRI_ATTRIB_NON_CONFORMANT_CONFIG; 510 else if (config->modes.visualRating == GLX_SLOW_CONFIG) 511 *value = __DRI_ATTRIB_SLOW_BIT; 512 else 513 *value = 0; 514 break; 515 case __DRI_ATTRIB_SWAP_METHOD: 516 /* XXX no return value??? */ 517 break; 518 519 case __DRI_ATTRIB_FLOAT_MODE: 520 /* this field is not int-sized */ 521 *value = config->modes.floatMode; 522 break; 523 524 default: 525 /* any other int-sized field */ 526 *value = *(unsigned int *) 527 ((char *) &config->modes + attribMap[index].offset); 528 529 break; 530 } 531 532 return GL_TRUE; 533 } 534 535 536 /** 537 * Get the value of a configuration attribute. 538 * \param attrib the attribute (one of the _DRI_ATTRIB_x tokens) 539 * \param value returns the attribute's value 540 * \return 1 for success, 0 for failure 541 */ 542 int 543 driGetConfigAttrib(const __DRIconfig *config, 544 unsigned int attrib, unsigned int *value) 545 { 546 int i; 547 548 for (i = 0; i < ARRAY_SIZE(attribMap); i++) 549 if (attribMap[i].attrib == attrib) 550 return driGetConfigAttribIndex(config, i, value); 551 552 return GL_FALSE; 553 } 554 555 556 /** 557 * Get a configuration attribute name and value, given an index. 558 * \param index which field of the __DRIconfig to query 559 * \param attrib returns the attribute name (one of the _DRI_ATTRIB_x tokens) 560 * \param value returns the attribute's value 561 * \return 1 for success, 0 for failure 562 */ 563 int 564 driIndexConfigAttrib(const __DRIconfig *config, int index, 565 unsigned int *attrib, unsigned int *value) 566 { 567 if (index >= 0 && index < ARRAY_SIZE(attribMap)) { 568 *attrib = attribMap[index].attrib; 569 return driGetConfigAttribIndex(config, index, value); 570 } 571 572 return GL_FALSE; 573 } 574
