summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/util/p_debug.c
blob: 2c2f2f8931f473c9986cef666d1b8382459c784d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
/**************************************************************************
 * 
 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/


#include "pipe/p_config.h" 

#include <stdarg.h>


#ifdef PIPE_SUBSYSTEM_WINDOWS_DISPLAY

#include <windows.h>
#include <winddi.h>

#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)

#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN      // Exclude rarely-used stuff from Windows headers
#endif
#include <windows.h>

#else

#include <stdio.h>
#include <stdlib.h>

#endif

#include "pipe/p_compiler.h" 
#include "pipe/p_util.h" 
#include "pipe/p_debug.h" 
#include "pipe/p_format.h" 
#include "pipe/p_state.h" 
#include "pipe/p_inlines.h" 
#include "util/u_string.h" 


#ifdef PIPE_SUBSYSTEM_WINDOWS_DISPLAY
static INLINE void 
_EngDebugPrint(const char *format, ...)
{
   va_list ap;
   va_start(ap, format);
   EngDebugPrint("", (PCHAR)format, ap);
   va_end(ap);
}
#endif


void _debug_vprintf(const char *format, va_list ap)
{
#if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
   /* EngDebugPrint does not handle float point arguments, so we need to use
    * our own vsnprintf implementation. It is also very slow, so buffer until
    * we find a newline. */
   static char buf[512 + 1] = {'\0'};
   size_t len = strlen(buf);
   int ret = util_vsnprintf(buf + len, sizeof(buf) - len, format, ap);
   if(ret > (int)(sizeof(buf) - len - 1) || util_strchr(buf + len, '\n')) {
      _EngDebugPrint("%s", buf);
      buf[0] = '\0';
   }
#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
   /* EngDebugPrint does not handle float point arguments, so we need to use
    * our own vsnprintf implementation. It is also very slow, so buffer until
    * we find a newline. */
   static char buf[512 + 1] = {'\0'};
   size_t len = strlen(buf);
   int ret = util_vsnprintf(buf + len, sizeof(buf) - len, format, ap);
   if(ret > (int)(sizeof(buf) - len - 1) || util_strchr(buf + len, '\n')) {
      OutputDebugStringA(buf);
      buf[0] = '\0';
   }
#elif defined(PIPE_SUBSYSTEM_WINDOWS_CE) || defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT) 
   /* TODO */
#else /* !PIPE_SUBSYSTEM_WINDOWS */
   vfprintf(stderr, format, ap);
#endif
}


#ifdef DEBUG
void debug_print_blob( const char *name,
                       const void *blob,
                       unsigned size )
{
   const unsigned *ublob = (const unsigned *)blob;
   unsigned i;

   debug_printf("%s (%d dwords%s)\n", name, size/4,
                size%4 ? "... plus a few bytes" : "");

   for (i = 0; i < size/4; i++) {
      debug_printf("%d:\t%08x\n", i, ublob[i]);
   }
}
#endif


void _debug_break(void) 
{
#if defined(PIPE_ARCH_X86) && defined(PIPE_CC_GCC)
   __asm("int3");
#elif defined(PIPE_ARCH_X86) && defined(PIPE_CC_MSVC)
   _asm {int 3};
#elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
   EngDebugBreak();
#else
   abort();
#endif
}


#ifdef PIPE_SUBSYSTEM_WINDOWS_DISPLAY
static const char *
find(const char *start, const char *end, char c) 
{
   const char *p;
   for(p = start; !end || p != end; ++p) {
      if(*p == c)
	 return p;
      if(*p < 32)
	 break;
   }
   return NULL;
}

static int 
compare(const char *start, const char *end, const char *s)
{
   const char *p, *q;
   for(p = start, q = s; p != end && *q != '\0'; ++p, ++q) {
      if(*p != *q)
	 return 0;
   }
   return p == end && *q == '\0';
}

static void 
copy(char *dst, const char *start, const char *end, size_t n) 
{
   const char *p;
   char *q;
   for(p = start, q = dst, n = n - 1; p != end && n; ++p, ++q, --n)
      *q = *p;
   *q = '\0';
}
#endif


static INLINE const char *
_debug_get_option(const char *name)
{
#if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
   /* EngMapFile creates the file if it does not exists, so it must either be
    * disabled on release versions (or put in a less conspicuous place). */
#ifdef DEBUG
   const char *result = NULL;
   ULONG_PTR iFile = 0;
   const void *pMap = NULL;
   const char *sol, *eol, *sep;
   static char output[1024];
   
   pMap = EngMapFile(L"\\??\\c:\\gallium.cfg", 0, &iFile);
   if(pMap) {
      sol = (const char *)pMap;
      while(1) {
	 /* TODO: handle LF line endings */
	 eol = find(sol, NULL, '\r');
	 if(!eol || eol == sol)
	    break;
	 sep = find(sol, eol, '=');
	 if(!sep)
	    break;
	 if(compare(sol, sep, name)) {
	    copy(output, sep + 1, eol, sizeof(output));
	    result = output;
	    break;
	 }
	 sol = eol + 2;
      }
      EngUnmapFile(iFile);
   }
   return result;
#else
   return NULL;
#endif
#elif defined(PIPE_SUBSYSTEM_WINDOWS_CE) || defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT) 
   /* TODO: implement */
   return NULL;
#else
   return getenv(name);
#endif
}

const char *
debug_get_option(const char *name, const char *dfault)
{
   const char *result;

   result = _debug_get_option(name);
   if(!result)
      result = dfault;
      
   debug_printf("%s: %s = %s\n", __FUNCTION__, name, result ? result : "(null)");
   
   return result;
}

boolean
debug_get_bool_option(const char *name, boolean dfault)
{
   const char *str = _debug_get_option(name);
   boolean result;
   
   if(str == NULL)
      result = dfault;
   else if(!util_strcmp(str, "n"))
      result = FALSE;
   else if(!util_strcmp(str, "no"))
      result = FALSE;
   else if(!util_strcmp(str, "0"))
      result = FALSE;
   else if(!util_strcmp(str, "f"))
      result = FALSE;
   else if(!util_strcmp(str, "false"))
      result = FALSE;
   else
      result = TRUE;

   debug_printf("%s: %s = %s\n", __FUNCTION__, name, result ? "TRUE" : "FALSE");
   
   return result;
}


long
debug_get_num_option(const char *name, long dfault)
{
   long result;
   const char *str;
   
   str = _debug_get_option(name);
   if(!str)
      result = dfault;
   else {
      long sign;
      char c;
      c = *str++;
      if(c == '-') {
	 sign = -1;
	 c = *str++;
      } 
      else {
	 sign = 1;
      }
      result = 0;
      while('0' <= c && c <= '9') {
	 result = result*10 + (c - '0');
	 c = *str++;
      }
      result *= sign;
   }
   
   debug_printf("%s: %s = %li\n", __FUNCTION__, name, result);

   return result;
}


unsigned long
debug_get_flags_option(const char *name, 
                       const struct debug_named_value *flags,
                       unsigned long dfault)
{
   unsigned long result;
   const char *str;
   
   str = _debug_get_option(name);
   if(!str)
      result = dfault;
   else {
      result = 0;
      while( flags->name ) {
	 if (!util_strcmp(str, "all") || util_strstr(str, flags->name ))
	    result |= flags->value;
	 ++flags;
      }
   }

   debug_printf("%s: %s = 0x%lx\n", __FUNCTION__, name, result);

   return result;
}


void _debug_assert_fail(const char *expr, 
                        const char *file, 
                        unsigned line, 
                        const char *function) 
{
   _debug_printf("%s:%u:%s: Assertion `%s' failed.\n", file, line, function, expr);
#if defined(PIPE_OS_WINDOWS)
   if (debug_get_bool_option("GALLIUM_ABORT_ON_ASSERT", FALSE))
#else
   if (debug_get_bool_option("GALLIUM_ABORT_ON_ASSERT", TRUE))
#endif
      debug_break();
   else
      _debug_printf("continuing...\n");
}


const char *
debug_dump_enum(const struct debug_named_value *names, 
                unsigned long value)
{
   static char rest[64];
   
   while(names->name) {
      if(names->value == value)
	 return names->name;
      ++names;
   }

   util_snprintf(rest, sizeof(rest), "0x%08lx", value);
   return rest;
}


const char *
debug_dump_flags(const struct debug_named_value *names, 
                 unsigned long value)
{
   static char output[4096];
   static char rest[256];
   int first = 1;

   output[0] = '\0';

   while(names->name) {
      if((names->value & value) == names->value) {
	 if (!first)
	    util_strncat(output, "|", sizeof(output));
	 else
	    first = 0;
	 util_strncat(output, names->name, sizeof(output));
	 value &= ~names->value;
      }
      ++names;
   }
   
   if (value) {
      if (!first)
	 util_strncat(output, "|", sizeof(output));
      else
	 first = 0;
      
      util_snprintf(rest, sizeof(rest), "0x%08lx", value);
      util_strncat(output, rest, sizeof(output));
   }
   
   if(first)
      return "0";
   
   return output;
}


static const struct debug_named_value pipe_format_names[] = {
#ifdef DEBUG
   DEBUG_NAMED_VALUE(PIPE_FORMAT_NONE),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_A8R8G8B8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_X8R8G8B8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_B8G8R8A8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_B8G8R8X8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_A1R5G5B5_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_A4R4G4B4_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R5G6B5_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_A2B10G10R10_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_L8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_A8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_I8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_A8L8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_L16_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_YCBCR),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_YCBCR_REV),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_Z16_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_Z32_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_Z32_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_S8Z24_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_Z24S8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_X8Z24_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_Z24X8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_S8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R64_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R64G64_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R64G64B64_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R64G64B64A64_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32A32_FLOAT),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32A32_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32A32_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32A32_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R32G32B32A32_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16B16_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16B16A16_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16B16_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16B16A16_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16B16_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16B16A16_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16B16_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R16G16B16A16_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8A8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8X8_UNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8A8_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8X8_USCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8A8_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8X8_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_B6G5R5_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_A8B8G8R8_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_X8B8G8R8_SNORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8A8_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8X8_SSCALED),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_L8_SRGB),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_A8_L8_SRGB),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8_SRGB),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8A8_SRGB),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_R8G8B8X8_SRGB),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_X8UB8UG8SR8S_NORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_B6UG5SR5S_NORM),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_DXT1_RGB),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_DXT1_RGBA),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_DXT3_RGBA),
   DEBUG_NAMED_VALUE(PIPE_FORMAT_DXT5_RGBA),
#endif
   DEBUG_NAMED_VALUE_END
};

#ifdef DEBUG
void debug_print_format(const char *msg, unsigned fmt )
{
   debug_printf("%s: %s\n", msg, debug_dump_enum(pipe_format_names, fmt)); 
}
#endif

const char *pf_name( enum pipe_format format )
{
   return debug_dump_enum(pipe_format_names, format);
}


#ifdef DEBUG
void debug_dump_image(const char *prefix,
                      unsigned format, unsigned cpp,
                      unsigned width, unsigned height,
                      unsigned stride,
                      const void *data)     
{
#ifdef PIPE_SUBSYSTEM_WINDOWS_DISPLAY
   static unsigned no = 0; 
   char filename[256];
   WCHAR wfilename[sizeof(filename)];
   ULONG_PTR iFile = 0;
   struct {
      unsigned format;
      unsigned cpp;
      unsigned width;
      unsigned height;
   } header;
   unsigned char *pMap = NULL;
   unsigned i;

   util_snprintf(filename, sizeof(filename), "\\??\\c:\\%03u%s.raw", ++no, prefix);
   for(i = 0; i < sizeof(filename); ++i)
      wfilename[i] = (WCHAR)filename[i];
   
   pMap = (unsigned char *)EngMapFile(wfilename, sizeof(header) + height*width*cpp, &iFile);
   if(!pMap)
      return;
   
   header.format = format;
   header.cpp = cpp;
   header.width = width;
   header.height = height;
   memcpy(pMap, &header, sizeof(header));
   pMap += sizeof(header);
   
   for(i = 0; i < height; ++i) {
      memcpy(pMap, (unsigned char *)data + stride*i, cpp*width);
      pMap += cpp*width;
   }
      
   EngUnmapFile(iFile);
#endif
}

void debug_dump_surface(const char *prefix,
                        struct pipe_surface *surface)     
{
   unsigned surface_usage;
   void *data;

   if (!surface)
      goto error1;

   /* XXX: force mappable surface */
   surface_usage = surface->usage;
   surface->usage |= PIPE_BUFFER_USAGE_CPU_READ;
   
   data = pipe_surface_map(surface, 
                           PIPE_BUFFER_USAGE_CPU_READ);
   if(!data)
      goto error2;
   
   debug_dump_image(prefix, 
                    surface->format,
                    surface->block.size, 
                    surface->nblocksx,
                    surface->nblocksy,
                    surface->stride,
                    data);
   
   pipe_surface_unmap(surface);
error2:
   surface->usage = surface_usage;
error1:
   ;
}
#endif