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 <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
driParseDebugString(const char * debug,const struct dri_debug_control * control)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
driGetRendererString(char * buffer,const char * hardware_name,GLuint agp_mode)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 **
driCreateConfigs(GLenum fb_format,GLenum fb_type,const uint8_t * depth_bits,const uint8_t * stencil_bits,unsigned num_depth_stencil_bits,const GLenum * db_modes,unsigned num_db_modes,const uint8_t * msaa_samples,unsigned num_msaa_modes,GLboolean enable_accum)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
driConcatConfigs(__DRIconfig ** a,__DRIconfig ** b)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
driGetConfigAttribIndex(const __DRIconfig * config,unsigned int index,unsigned int * value)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
driGetConfigAttrib(const __DRIconfig * config,unsigned int attrib,unsigned int * value)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
driIndexConfigAttrib(const __DRIconfig * config,int index,unsigned int * attrib,unsigned int * value)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