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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
driGetRendererString(char * buffer,const char * hardware_name,GLuint agp_mode)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  *
151  * \returns
152  * Pointer to any array of pointers to the \c __DRIconfig structures created
153  * for the specified formats.  If there is an error, \c NULL is returned.
154  * Currently the only cause of failure is a bad parameter (i.e., unsupported
155  * \c format).
156  */
157 __DRIconfig **
driCreateConfigs(mesa_format format,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,GLboolean color_depth_match)158 driCreateConfigs(mesa_format format,
159 		 const uint8_t * depth_bits, const uint8_t * stencil_bits,
160 		 unsigned num_depth_stencil_bits,
161 		 const GLenum * db_modes, unsigned num_db_modes,
162 		 const uint8_t * msaa_samples, unsigned num_msaa_modes,
163 		 GLboolean enable_accum, GLboolean color_depth_match)
164 {
165    static const uint32_t masks_table[][4] = {
166       /* MESA_FORMAT_B5G6R5_UNORM */
167       { 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 },
168       /* MESA_FORMAT_B8G8R8X8_UNORM */
169       { 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 },
170       /* MESA_FORMAT_B8G8R8A8_UNORM */
171       { 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 },
172       /* MESA_FORMAT_B10G10R10X2_UNORM */
173       { 0x3FF00000, 0x000FFC00, 0x000003FF, 0x00000000 },
174       /* MESA_FORMAT_B10G10R10A2_UNORM */
175       { 0x3FF00000, 0x000FFC00, 0x000003FF, 0xC0000000 },
176       /* MESA_FORMAT_R8G8B8A8_UNORM */
177       { 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 },
178       /* MESA_FORMAT_R8G8B8X8_UNORM */
179       { 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000 },
180    };
181 
182    const uint32_t * masks;
183    __DRIconfig **configs, **c;
184    struct gl_config *modes;
185    unsigned i, j, k, h;
186    unsigned num_modes;
187    unsigned num_accum_bits = (enable_accum) ? 2 : 1;
188    int red_bits;
189    int green_bits;
190    int blue_bits;
191    int alpha_bits;
192    bool is_srgb;
193 
194    switch (format) {
195    case MESA_FORMAT_B5G6R5_UNORM:
196       masks = masks_table[0];
197       break;
198    case MESA_FORMAT_B8G8R8X8_UNORM:
199    case MESA_FORMAT_B8G8R8X8_SRGB:
200       masks = masks_table[1];
201       break;
202    case MESA_FORMAT_B8G8R8A8_UNORM:
203    case MESA_FORMAT_B8G8R8A8_SRGB:
204       masks = masks_table[2];
205       break;
206    case MESA_FORMAT_R8G8B8A8_UNORM:
207       masks = masks_table[5];
208       break;
209    case MESA_FORMAT_R8G8B8X8_UNORM:
210       masks = masks_table[6];
211       break;
212    case MESA_FORMAT_B10G10R10X2_UNORM:
213       masks = masks_table[3];
214       break;
215    case MESA_FORMAT_B10G10R10A2_UNORM:
216       masks = masks_table[4];
217       break;
218    default:
219       fprintf(stderr, "[%s:%u] Unknown framebuffer type %s (%d).\n",
220               __func__, __LINE__,
221               _mesa_get_format_name(format), format);
222       return NULL;
223    }
224 
225    red_bits = _mesa_get_format_bits(format, GL_RED_BITS);
226    green_bits = _mesa_get_format_bits(format, GL_GREEN_BITS);
227    blue_bits = _mesa_get_format_bits(format, GL_BLUE_BITS);
228    alpha_bits = _mesa_get_format_bits(format, GL_ALPHA_BITS);
229    is_srgb = _mesa_get_format_color_encoding(format) == GL_SRGB;
230 
231    num_modes = num_depth_stencil_bits * num_db_modes * num_accum_bits * num_msaa_modes;
232    configs = calloc(num_modes + 1, sizeof *configs);
233    if (configs == NULL)
234        return NULL;
235 
236     c = configs;
237     for ( k = 0 ; k < num_depth_stencil_bits ; k++ ) {
238 	for ( i = 0 ; i < num_db_modes ; i++ ) {
239 	    for ( h = 0 ; h < num_msaa_modes; h++ ) {
240 	    	for ( j = 0 ; j < num_accum_bits ; j++ ) {
241 		    if (color_depth_match &&
242 			(depth_bits[k] || stencil_bits[k])) {
243 			/* Depth can really only be 0, 16, 24, or 32. A 32-bit
244 			 * color format still matches 24-bit depth, as there
245 			 * is an implicit 8-bit stencil. So really we just
246 			 * need to make sure that color/depth are both 16 or
247 			 * both non-16.
248 			 */
249 			if ((depth_bits[k] + stencil_bits[k] == 16) !=
250 			    (red_bits + green_bits + blue_bits + alpha_bits == 16))
251 			    continue;
252 		    }
253 
254 		    *c = malloc (sizeof **c);
255 		    modes = &(*c)->modes;
256 		    c++;
257 
258 		    memset(modes, 0, sizeof *modes);
259 		    modes->redBits   = red_bits;
260 		    modes->greenBits = green_bits;
261 		    modes->blueBits  = blue_bits;
262 		    modes->alphaBits = alpha_bits;
263 		    modes->redMask   = masks[0];
264 		    modes->greenMask = masks[1];
265 		    modes->blueMask  = masks[2];
266 		    modes->alphaMask = masks[3];
267 		    modes->rgbBits   = modes->redBits + modes->greenBits
268 		    	+ modes->blueBits + modes->alphaBits;
269 
270 		    modes->accumRedBits   = 16 * j;
271 		    modes->accumGreenBits = 16 * j;
272 		    modes->accumBlueBits  = 16 * j;
273 		    modes->accumAlphaBits = (masks[3] != 0) ? 16 * j : 0;
274 		    modes->visualRating = (j == 0) ? GLX_NONE : GLX_SLOW_CONFIG;
275 
276 		    modes->stencilBits = stencil_bits[k];
277 		    modes->depthBits = depth_bits[k];
278 
279 		    modes->transparentPixel = GLX_NONE;
280 		    modes->transparentRed = GLX_DONT_CARE;
281 		    modes->transparentGreen = GLX_DONT_CARE;
282 		    modes->transparentBlue = GLX_DONT_CARE;
283 		    modes->transparentAlpha = GLX_DONT_CARE;
284 		    modes->transparentIndex = GLX_DONT_CARE;
285 		    modes->rgbMode = GL_TRUE;
286 
287 		    if ( db_modes[i] == GLX_NONE ) {
288 		    	modes->doubleBufferMode = GL_FALSE;
289 		    }
290 		    else {
291 		    	modes->doubleBufferMode = GL_TRUE;
292 		    	modes->swapMethod = db_modes[i];
293 		    }
294 
295 		    modes->samples = msaa_samples[h];
296 		    modes->sampleBuffers = modes->samples ? 1 : 0;
297 
298 
299 		    modes->haveAccumBuffer = ((modes->accumRedBits +
300 					   modes->accumGreenBits +
301 					   modes->accumBlueBits +
302 					   modes->accumAlphaBits) > 0);
303 		    modes->haveDepthBuffer = (modes->depthBits > 0);
304 		    modes->haveStencilBuffer = (modes->stencilBits > 0);
305 
306 		    modes->bindToTextureRgb = GL_TRUE;
307 		    modes->bindToTextureRgba = GL_TRUE;
308 		    modes->bindToMipmapTexture = GL_FALSE;
309 		    modes->bindToTextureTargets =
310 			__DRI_ATTRIB_TEXTURE_1D_BIT |
311 			__DRI_ATTRIB_TEXTURE_2D_BIT |
312 			__DRI_ATTRIB_TEXTURE_RECTANGLE_BIT;
313 
314 		    modes->yInverted = GL_TRUE;
315 		    modes->sRGBCapable = is_srgb;
316 		}
317 	    }
318 	}
319     }
320     *c = NULL;
321 
322     return configs;
323 }
324 
driConcatConfigs(__DRIconfig ** a,__DRIconfig ** b)325 __DRIconfig **driConcatConfigs(__DRIconfig **a,
326 			       __DRIconfig **b)
327 {
328     __DRIconfig **all;
329     int i, j, index;
330 
331     if (a == NULL || a[0] == NULL)
332        return b;
333     else if (b == NULL || b[0] == NULL)
334        return a;
335 
336     i = 0;
337     while (a[i] != NULL)
338 	i++;
339     j = 0;
340     while (b[j] != NULL)
341 	j++;
342 
343     all = malloc((i + j + 1) * sizeof *all);
344     index = 0;
345     for (i = 0; a[i] != NULL; i++)
346 	all[index++] = a[i];
347     for (j = 0; b[j] != NULL; j++)
348 	all[index++] = b[j];
349     all[index++] = NULL;
350 
351     free(a);
352     free(b);
353 
354     return all;
355 }
356 
357 #define __ATTRIB(attrib, field) \
358     { attrib, offsetof(struct gl_config, field) }
359 
360 static const struct { unsigned int attrib, offset; } attribMap[] = {
361     __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE,			rgbBits),
362     __ATTRIB(__DRI_ATTRIB_LEVEL,			level),
363     __ATTRIB(__DRI_ATTRIB_RED_SIZE,			redBits),
364     __ATTRIB(__DRI_ATTRIB_GREEN_SIZE,			greenBits),
365     __ATTRIB(__DRI_ATTRIB_BLUE_SIZE,			blueBits),
366     __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE,			alphaBits),
367     __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE,			depthBits),
368     __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE,			stencilBits),
369     __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE,		accumRedBits),
370     __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE,		accumGreenBits),
371     __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE,		accumBlueBits),
372     __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE,		accumAlphaBits),
373     __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS,		sampleBuffers),
374     __ATTRIB(__DRI_ATTRIB_SAMPLES,			samples),
375     __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER,		doubleBufferMode),
376     __ATTRIB(__DRI_ATTRIB_STEREO,			stereoMode),
377     __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS,			numAuxBuffers),
378     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE,		transparentPixel),
379     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE,	transparentPixel),
380     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE,	transparentRed),
381     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE,	transparentGreen),
382     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE,	transparentBlue),
383     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE,	transparentAlpha),
384     __ATTRIB(__DRI_ATTRIB_RED_MASK,			redMask),
385     __ATTRIB(__DRI_ATTRIB_GREEN_MASK,			greenMask),
386     __ATTRIB(__DRI_ATTRIB_BLUE_MASK,			blueMask),
387     __ATTRIB(__DRI_ATTRIB_ALPHA_MASK,			alphaMask),
388     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH,		maxPbufferWidth),
389     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT,		maxPbufferHeight),
390     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS,		maxPbufferPixels),
391     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH,	optimalPbufferWidth),
392     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT,	optimalPbufferHeight),
393     __ATTRIB(__DRI_ATTRIB_SWAP_METHOD,			swapMethod),
394     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB,		bindToTextureRgb),
395     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA,		bindToTextureRgba),
396     __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,	bindToMipmapTexture),
397     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS,	bindToTextureTargets),
398     __ATTRIB(__DRI_ATTRIB_YINVERTED,			yInverted),
399     __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE,	sRGBCapable),
400 
401     /* The struct field doesn't matter here, these are handled by the
402      * switch in driGetConfigAttribIndex.  We need them in the array
403      * so the iterator includes them though.*/
404     __ATTRIB(__DRI_ATTRIB_RENDER_TYPE,			level),
405     __ATTRIB(__DRI_ATTRIB_CONFIG_CAVEAT,		level),
406     __ATTRIB(__DRI_ATTRIB_SWAP_METHOD,			level)
407 };
408 
409 
410 /**
411  * Return the value of a configuration attribute.  The attribute is
412  * indicated by the index.
413  */
414 static int
driGetConfigAttribIndex(const __DRIconfig * config,unsigned int index,unsigned int * value)415 driGetConfigAttribIndex(const __DRIconfig *config,
416 			unsigned int index, unsigned int *value)
417 {
418     switch (attribMap[index].attrib) {
419     case __DRI_ATTRIB_RENDER_TYPE:
420         /* no support for color index mode */
421 	*value = __DRI_ATTRIB_RGBA_BIT;
422 	break;
423     case __DRI_ATTRIB_CONFIG_CAVEAT:
424 	if (config->modes.visualRating == GLX_NON_CONFORMANT_CONFIG)
425 	    *value = __DRI_ATTRIB_NON_CONFORMANT_CONFIG;
426 	else if (config->modes.visualRating == GLX_SLOW_CONFIG)
427 	    *value = __DRI_ATTRIB_SLOW_BIT;
428 	else
429 	    *value = 0;
430 	break;
431     case __DRI_ATTRIB_SWAP_METHOD:
432         /* XXX no return value??? */
433 	break;
434 
435     default:
436         /* any other int-sized field */
437 	*value = *(unsigned int *)
438 	    ((char *) &config->modes + attribMap[index].offset);
439 
440 	break;
441     }
442 
443     return GL_TRUE;
444 }
445 
446 
447 /**
448  * Get the value of a configuration attribute.
449  * \param attrib  the attribute (one of the _DRI_ATTRIB_x tokens)
450  * \param value  returns the attribute's value
451  * \return 1 for success, 0 for failure
452  */
453 int
driGetConfigAttrib(const __DRIconfig * config,unsigned int attrib,unsigned int * value)454 driGetConfigAttrib(const __DRIconfig *config,
455 		   unsigned int attrib, unsigned int *value)
456 {
457     unsigned i;
458 
459     for (i = 0; i < ARRAY_SIZE(attribMap); i++)
460 	if (attribMap[i].attrib == attrib)
461 	    return driGetConfigAttribIndex(config, i, value);
462 
463     return GL_FALSE;
464 }
465 
466 
467 /**
468  * Get a configuration attribute name and value, given an index.
469  * \param index  which field of the __DRIconfig to query
470  * \param attrib  returns the attribute name (one of the _DRI_ATTRIB_x tokens)
471  * \param value  returns the attribute's value
472  * \return 1 for success, 0 for failure
473  */
474 int
driIndexConfigAttrib(const __DRIconfig * config,int index,unsigned int * attrib,unsigned int * value)475 driIndexConfigAttrib(const __DRIconfig *config, int index,
476 		     unsigned int *attrib, unsigned int *value)
477 {
478     if (index >= 0 && index < ARRAY_SIZE(attribMap)) {
479 	*attrib = attribMap[index].attrib;
480 	return driGetConfigAttribIndex(config, index, value);
481     }
482 
483     return GL_FALSE;
484 }
485 
486 /**
487  * Implement queries for values that are common across all Mesa drivers
488  *
489  * Currently only the following queries are supported by this function:
490  *
491  *     - \c __DRI2_RENDERER_VERSION
492  *     - \c __DRI2_RENDERER_PREFERRED_PROFILE
493  *     - \c __DRI2_RENDERER_OPENGL_CORE_PROFILE_VERSION
494  *     - \c __DRI2_RENDERER_OPENGL_COMPATIBLITY_PROFILE_VERSION
495  *     - \c __DRI2_RENDERER_ES_PROFILE_VERSION
496  *     - \c __DRI2_RENDERER_ES2_PROFILE_VERSION
497  *
498  * \returns
499  * Zero if a recognized value of \c param is supplied, -1 otherwise.
500  */
501 int
driQueryRendererIntegerCommon(__DRIscreen * psp,int param,unsigned int * value)502 driQueryRendererIntegerCommon(__DRIscreen *psp, int param, unsigned int *value)
503 {
504    switch (param) {
505    case __DRI2_RENDERER_VERSION: {
506       static const char *const ver = PACKAGE_VERSION;
507       char *endptr;
508       int v[3];
509 
510       v[0] = strtol(ver, &endptr, 10);
511       assert(endptr[0] == '.');
512       if (endptr[0] != '.')
513          return -1;
514 
515       v[1] = strtol(endptr + 1, &endptr, 10);
516       assert(endptr[0] == '.');
517       if (endptr[0] != '.')
518          return -1;
519 
520       v[2] = strtol(endptr + 1, &endptr, 10);
521 
522       value[0] = v[0];
523       value[1] = v[1];
524       value[2] = v[2];
525       return 0;
526    }
527    case __DRI2_RENDERER_PREFERRED_PROFILE:
528       value[0] = (psp->max_gl_core_version != 0)
529          ? (1U << __DRI_API_OPENGL_CORE) : (1U << __DRI_API_OPENGL);
530       return 0;
531    case __DRI2_RENDERER_OPENGL_CORE_PROFILE_VERSION:
532       value[0] = psp->max_gl_core_version / 10;
533       value[1] = psp->max_gl_core_version % 10;
534       return 0;
535    case __DRI2_RENDERER_OPENGL_COMPATIBILITY_PROFILE_VERSION:
536       value[0] = psp->max_gl_compat_version / 10;
537       value[1] = psp->max_gl_compat_version % 10;
538       return 0;
539    case __DRI2_RENDERER_OPENGL_ES_PROFILE_VERSION:
540       value[0] = psp->max_gl_es1_version / 10;
541       value[1] = psp->max_gl_es1_version % 10;
542       return 0;
543    case __DRI2_RENDERER_OPENGL_ES2_PROFILE_VERSION:
544       value[0] = psp->max_gl_es2_version / 10;
545       value[1] = psp->max_gl_es2_version % 10;
546       return 0;
547    default:
548       break;
549    }
550 
551    return -1;
552 }
553