src/mesa/main/debug.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "mtypes.h"
  27 #include "attrib.h"
  28 #include "colormac.h"
  29 #include "enums.h"
  30 #include "formats.h"
  31 #include "hash.h"
  32 #include "imports.h"
  33 #include "debug.h"
  34 #include "get.h"
  35 #include "pixelstore.h"
  36 #include "readpix.h"
  37 #include "texobj.h"
  38
  39
  40 static const char *
  41 tex_target_name(GLenum tgt)
  42 {
  43    static const struct {
  44       GLenum target;
  45       const char *name;
  46    } tex_targets[] = {
  47       { GL_TEXTURE_1D, "GL_TEXTURE_1D" },
  48       { GL_TEXTURE_2D, "GL_TEXTURE_2D" },
  49       { GL_TEXTURE_3D, "GL_TEXTURE_3D" },
  50       { GL_TEXTURE_CUBE_MAP, "GL_TEXTURE_CUBE_MAP" },
  51       { GL_TEXTURE_RECTANGLE, "GL_TEXTURE_RECTANGLE" },
  52       { GL_TEXTURE_1D_ARRAY_EXT, "GL_TEXTURE_1D_ARRAY" },
  53       { GL_TEXTURE_2D_ARRAY_EXT, "GL_TEXTURE_2D_ARRAY" }
  54    };
  55    GLuint i;
  56    for (i = 0; i < Elements(tex_targets); i++) {
  57       if (tex_targets[i].target == tgt)
  58          return tex_targets[i].name;
  59    }
  60    return "UNKNOWN TEX TARGET";
  61 }
  62
  63
  64 void
  65 _mesa_print_state( const char *msg, GLuint state )
  66 {
  67    _mesa_debug(NULL,
  68            "%s: (0x%x) %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
  69            msg,
  70            state,
  71            (state & _NEW_MODELVIEW)       ? "ctx->ModelView, " : "",
  72            (state & _NEW_PROJECTION)      ? "ctx->Projection, " : "",
  73            (state & _NEW_TEXTURE_MATRIX)  ? "ctx->TextureMatrix, " : "",
  74            (state & _NEW_ACCUM)           ? "ctx->Accum, " : "",
  75            (state & _NEW_COLOR)           ? "ctx->Color, " : "",
  76            (state & _NEW_DEPTH)           ? "ctx->Depth, " : "",
  77            (state & _NEW_EVAL)            ? "ctx->Eval/EvalMap, " : "",
  78            (state & _NEW_FOG)             ? "ctx->Fog, " : "",
  79            (state & _NEW_HINT)            ? "ctx->Hint, " : "",
  80            (state & _NEW_LIGHT)           ? "ctx->Light, " : "",
  81            (state & _NEW_LINE)            ? "ctx->Line, " : "",
  82            (state & _NEW_PIXEL)           ? "ctx->Pixel, " : "",
  83            (state & _NEW_POINT)           ? "ctx->Point, " : "",
  84            (state & _NEW_POLYGON)         ? "ctx->Polygon, " : "",
  85            (state & _NEW_POLYGONSTIPPLE)  ? "ctx->PolygonStipple, " : "",
  86            (state & _NEW_SCISSOR)         ? "ctx->Scissor, " : "",
  87            (state & _NEW_STENCIL)         ? "ctx->Stencil, " : "",
  88            (state & _NEW_TEXTURE)         ? "ctx->Texture, " : "",
  89            (state & _NEW_TRANSFORM)       ? "ctx->Transform, " : "",
  90            (state & _NEW_VIEWPORT)        ? "ctx->Viewport, " : "",
  91            (state & _NEW_PACKUNPACK)      ? "ctx->Pack/Unpack, " : "",
  92            (state & _NEW_ARRAY)           ? "ctx->Array, " : "",
  93            (state & _NEW_RENDERMODE)      ? "ctx->RenderMode, " : "",
  94            (state & _NEW_BUFFERS)         ? "ctx->Visual, ctx->DrawBuffer,, " : "");
  95 }
  96
  97
  98
  99 void
 100 _mesa_print_tri_caps( const char *name, GLuint flags )
 101 {
 102    _mesa_debug(NULL,
 103            "%s: (0x%x) %s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 104            name,
 105            flags,
 106            (flags & DD_FLATSHADE)           ? "flat-shade, " : "",
 107            (flags & DD_SEPARATE_SPECULAR)   ? "separate-specular, " : "",
 108            (flags & DD_TRI_LIGHT_TWOSIDE)   ? "tri-light-twoside, " : "",
 109            (flags & DD_TRI_TWOSTENCIL)      ? "tri-twostencil, " : "",
 110            (flags & DD_TRI_UNFILLED)        ? "tri-unfilled, " : "",
 111            (flags & DD_TRI_STIPPLE)         ? "tri-stipple, " : "",
 112            (flags & DD_TRI_OFFSET)          ? "tri-offset, " : "",
 113            (flags & DD_TRI_SMOOTH)          ? "tri-smooth, " : "",
 114            (flags & DD_LINE_SMOOTH)         ? "line-smooth, " : "",
 115            (flags & DD_LINE_STIPPLE)        ? "line-stipple, " : "",
 116            (flags & DD_POINT_SMOOTH)        ? "point-smooth, " : "",
 117            (flags & DD_POINT_ATTEN)         ? "point-atten, " : "",
 118            (flags & DD_TRI_CULL_FRONT_BACK) ? "cull-all, " : ""
 119       );
 120 }
 121
 122
 123 /**
 124  * Print information about this Mesa version and build options.
 125  */
 126 void _mesa_print_info( void )
 127 {
 128    _mesa_debug(NULL, "Mesa GL_VERSION = %s\n",
 129            (char *) _mesa_GetString(GL_VERSION));
 130    _mesa_debug(NULL, "Mesa GL_RENDERER = %s\n",
 131            (char *) _mesa_GetString(GL_RENDERER));
 132    _mesa_debug(NULL, "Mesa GL_VENDOR = %s\n",
 133            (char *) _mesa_GetString(GL_VENDOR));
 134    _mesa_debug(NULL, "Mesa GL_EXTENSIONS = %s\n",
 135            (char *) _mesa_GetString(GL_EXTENSIONS));
 136 #if defined(THREADS)
 137    _mesa_debug(NULL, "Mesa thread-safe: YES\n");
 138 #else
 139    _mesa_debug(NULL, "Mesa thread-safe: NO\n");
 140 #endif
 141 #if defined(USE_X86_ASM)
 142    _mesa_debug(NULL, "Mesa x86-optimized: YES\n");
 143 #else
 144    _mesa_debug(NULL, "Mesa x86-optimized: NO\n");
 145 #endif
 146 #if defined(USE_SPARC_ASM)
 147    _mesa_debug(NULL, "Mesa sparc-optimized: YES\n");
 148 #else
 149    _mesa_debug(NULL, "Mesa sparc-optimized: NO\n");
 150 #endif
 151 }
 152
 153
 154 /**
 155  * Set the debugging flags.
 156  *
 157  * \param debug debug string
 158  *
 159  * If compiled with debugging support then search for keywords in \p debug and
 160  * enables the verbose debug output of the respective feature.
 161  */
 162 static void add_debug_flags( const char *debug )
 163 {
 164 #ifdef DEBUG
 165    struct debug_option {
 166       const char *name;
 167       GLbitfield flag;
 168    };
 169    static const struct debug_option debug_opt[] = {
 170       { "varray",    VERBOSE_VARRAY },
 171       { "tex",       VERBOSE_TEXTURE },
 172       { "mat",       VERBOSE_MATERIAL },
 173       { "pipe",      VERBOSE_PIPELINE },
 174       { "driver",    VERBOSE_DRIVER },
 175       { "state",     VERBOSE_STATE },
 176       { "api",       VERBOSE_API },
 177       { "list",      VERBOSE_DISPLAY_LIST },
 178       { "lighting",  VERBOSE_LIGHTING },
 179       { "disassem",  VERBOSE_DISASSEM },
 180       { "draw",      VERBOSE_DRAW },
 181       { "swap",      VERBOSE_SWAPBUFFERS }
 182    };
 183    GLuint i;
 184
 185    MESA_VERBOSE = 0x0;
 186    for (i = 0; i < Elements(debug_opt); i++) {
 187       if (strstr(debug, debug_opt[i].name))
 188          MESA_VERBOSE |= debug_opt[i].flag;
 189    }
 190
 191    /* Debug flag:
 192     */
 193    if (strstr(debug, "flush"))
 194       MESA_DEBUG_FLAGS |= DEBUG_ALWAYS_FLUSH;
 195
 196 #if defined(_FPU_GETCW) && defined(_FPU_SETCW)
 197    if (strstr(debug, "fpexceptions")) {
 198       /* raise FP exceptions */
 199       fpu_control_t mask;
 200       _FPU_GETCW(mask);
 201       mask &= ~(_FPU_MASK_IM | _FPU_MASK_DM | _FPU_MASK_ZM
 202                 | _FPU_MASK_OM | _FPU_MASK_UM);
 203       _FPU_SETCW(mask);
 204    }
 205 #endif
 206
 207 #else
 208    (void) debug;
 209 #endif
 210 }
 211
 212
 213 void
 214 _mesa_init_debug( struct gl_context *ctx )
 215 {
 216    char *c;
 217
 218    /* Dither disable */
 219    ctx->NoDither = _mesa_getenv("MESA_NO_DITHER") ? GL_TRUE : GL_FALSE;
 220    if (ctx->NoDither) {
 221       if (_mesa_getenv("MESA_DEBUG")) {
 222          _mesa_debug(ctx, "MESA_NO_DITHER set - dithering disabled\n");
 223       }
 224       ctx->Color.DitherFlag = GL_FALSE;
 225    }
 226
 227    c = _mesa_getenv("MESA_DEBUG");
 228    if (c)
 229       add_debug_flags(c);
 230
 231    c = _mesa_getenv("MESA_VERBOSE");
 232    if (c)
 233       add_debug_flags(c);
 234 }
 235
 236
 237 /*
 238  * Write ppm file
 239  */
 240 static void
 241 write_ppm(const char *filename, const GLubyte *buffer, int width, int height,
 242           int comps, int rcomp, int gcomp, int bcomp, GLboolean invert)
 243 {
 244    FILE *f = fopen( filename, "w" );
 245    if (f) {
 246       int x, y;
 247       const GLubyte *ptr = buffer;
 248       fprintf(f,"P6\n");
 249       fprintf(f,"# ppm-file created by osdemo.c\n");
 250       fprintf(f,"%i %i\n", width,height);
 251       fprintf(f,"255\n");
 252       fclose(f);
 253       f = fopen( filename, "ab" );  /* reopen in binary append mode */
 254       for (y=0; y < height; y++) {
 255          for (x = 0; x < width; x++) {
 256             int yy = invert ? (height - 1 - y) : y;
 257             int i = (yy * width + x) * comps;
 258             fputc(ptr[i+rcomp], f); /* write red */
 259             fputc(ptr[i+gcomp], f); /* write green */
 260             fputc(ptr[i+bcomp], f); /* write blue */
 261          }
 262       }
 263       fclose(f);
 264    }
 265 }
 266
 267
 268 /**
 269  * Write a texture image to a ppm file.
 270  * \param face  cube face in [0,5]
 271  * \param level  mipmap level
 272  */
 273 static void
 274 write_texture_image(struct gl_texture_object *texObj,
 275                     GLuint face, GLuint level)
 276 {
 277    struct gl_texture_image *img = texObj->Image[face][level];
 278    if (img) {
 279       GET_CURRENT_CONTEXT(ctx);
 280       struct gl_pixelstore_attrib store;
 281       GLubyte *buffer;
 282       char s[100];
 283
 284       buffer = (GLubyte *) malloc(img->Width * img->Height
 285                                         * img->Depth * 4);
 286
 287       store = ctx->Pack; /* save */
 288       ctx->Pack = ctx->DefaultPacking;
 289
 290       ctx->Driver.GetTexImage(ctx, texObj->Target, level,
 291                               GL_RGBA, GL_UNSIGNED_BYTE,
 292                               buffer, texObj, img);
 293
 294       /* make filename */
 295       _mesa_snprintf(s, sizeof(s), "/tmp/tex%u.l%u.f%u.ppm", texObj->Name, level, face);
 296
 297       printf("  Writing image level %u to %s\n", level, s);
 298       write_ppm(s, buffer, img->Width, img->Height, 4, 0, 1, 2, GL_FALSE);
 299
 300       ctx->Pack = store; /* restore */
 301
 302       free(buffer);
 303    }
 304 }
 305
 306
 307 /**
 308  * Write renderbuffer image to a ppm file.
 309  */
 310 static void
 311 write_renderbuffer_image(const struct gl_renderbuffer *rb)
 312 {
 313    GET_CURRENT_CONTEXT(ctx);
 314    GLubyte *buffer;
 315    char s[100];
 316    GLenum format, type;
 317
 318    if (rb->_BaseFormat == GL_RGB ||
 319        rb->_BaseFormat == GL_RGBA) {
 320       format = GL_RGBA;
 321       type = GL_UNSIGNED_BYTE;
 322    }
 323    else if (rb->_BaseFormat == GL_DEPTH_STENCIL) {
 324       format = GL_DEPTH_STENCIL;
 325       type = GL_UNSIGNED_INT_24_8;
 326    }
 327    else {
 328       return;
 329    }
 330
 331    buffer = (GLubyte *) malloc(rb->Width * rb->Height * 4);
 332
 333    ctx->Driver.ReadPixels(ctx, 0, 0, rb->Width, rb->Height,
 334                           format, type, &ctx->DefaultPacking, buffer);
 335
 336    /* make filename */
 337    _mesa_snprintf(s, sizeof(s), "/tmp/renderbuffer%u.ppm", rb->Name);
 338
 339    printf("  Writing renderbuffer image to %s\n", s);
 340    write_ppm(s, buffer, rb->Width, rb->Height, 4, 0, 1, 2, GL_TRUE);
 341
 342    free(buffer);
 343 }
 344
 345
 346 /** How many texture images (mipmap levels, faces) to write to files */
 347 #define WRITE_NONE 0
 348 #define WRITE_ONE  1
 349 #define WRITE_ALL  2
 350
 351 static GLuint WriteImages;
 352
 353
 354 static void
 355 dump_texture(struct gl_texture_object *texObj, GLuint writeImages)
 356 {
 357    const GLuint numFaces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
 358    GLboolean written = GL_FALSE;
 359    GLuint i, j;
 360
 361    printf("Texture %u\n", texObj->Name);
 362    printf("  Target %s\n", tex_target_name(texObj->Target));
 363    for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 364       for (j = 0; j < numFaces; j++) {
 365          struct gl_texture_image *texImg = texObj->Image[j][i];
 366          if (texImg) {
 367             printf("  Face %u level %u: %d x %d x %d, format %s at %p\n",
 368                    j, i,
 369                    texImg->Width, texImg->Height, texImg->Depth,
 370                    _mesa_get_format_name(texImg->TexFormat),
 371                    texImg->Data);
 372             if (writeImages == WRITE_ALL ||
 373                 (writeImages == WRITE_ONE && !written)) {
 374                write_texture_image(texObj, j, i);
 375                written = GL_TRUE;
 376             }
 377          }
 378       }
 379    }
 380 }
 381
 382
 383 /**
 384  * Dump a single texture.
 385  */
 386 void
 387 _mesa_dump_texture(GLuint texture, GLuint writeImages)
 388 {
 389    GET_CURRENT_CONTEXT(ctx);
 390    struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, texture);
 391    if (texObj) {
 392       dump_texture(texObj, writeImages);
 393    }
 394 }
 395
 396
 397 static void
 398 dump_texture_cb(GLuint id, void *data, void *userData)
 399 {
 400    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 401    (void) userData;
 402    dump_texture(texObj, WriteImages);
 403 }
 404
 405
 406 /**
 407  * Print basic info about all texture objext to stdout.
 408  * If dumpImages is true, write PPM of level[0] image to a file.
 409  */
 410 void
 411 _mesa_dump_textures(GLuint writeImages)
 412 {
 413    GET_CURRENT_CONTEXT(ctx);
 414    WriteImages = writeImages;
 415    _mesa_HashWalk(ctx->Shared->TexObjects, dump_texture_cb, ctx);
 416 }
 417
 418
 419 static void
 420 dump_renderbuffer(const struct gl_renderbuffer *rb, GLboolean writeImage)
 421 {
 422    printf("Renderbuffer %u: %u x %u  IntFormat = %s\n",
 423           rb->Name, rb->Width, rb->Height,
 424           _mesa_lookup_enum_by_nr(rb->InternalFormat));
 425    if (writeImage) {
 426       write_renderbuffer_image(rb);
 427    }
 428 }
 429
 430
 431 static void
 432 dump_renderbuffer_cb(GLuint id, void *data, void *userData)
 433 {
 434    const struct gl_renderbuffer *rb = (const struct gl_renderbuffer *) data;
 435    (void) userData;
 436    dump_renderbuffer(rb, WriteImages);
 437 }
 438
 439
 440 /**
 441  * Print basic info about all renderbuffers to stdout.
 442  * If dumpImages is true, write PPM of level[0] image to a file.
 443  */
 444 void
 445 _mesa_dump_renderbuffers(GLboolean writeImages)
 446 {
 447    GET_CURRENT_CONTEXT(ctx);
 448    WriteImages = writeImages;
 449    _mesa_HashWalk(ctx->Shared->RenderBuffers, dump_renderbuffer_cb, ctx);
 450 }
 451
 452
 453
 454 void
 455 _mesa_dump_color_buffer(const char *filename)
 456 {
 457    GET_CURRENT_CONTEXT(ctx);
 458    const GLuint w = ctx->DrawBuffer->Width;
 459    const GLuint h = ctx->DrawBuffer->Height;
 460    GLubyte *buf;
 461
 462    buf = (GLubyte *) malloc(w * h * 4);
 463
 464    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 465    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 466    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 467
 468    _mesa_ReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
 469
 470    printf("ReadBuffer %p 0x%x  DrawBuffer %p 0x%x\n",
 471           (void *) ctx->ReadBuffer->_ColorReadBuffer,
 472           ctx->ReadBuffer->ColorReadBuffer,
 473           (void *) ctx->DrawBuffer->_ColorDrawBuffers[0],
 474           ctx->DrawBuffer->ColorDrawBuffer[0]);
 475    printf("Writing %d x %d color buffer to %s\n", w, h, filename);
 476    write_ppm(filename, buf, w, h, 4, 0, 1, 2, GL_TRUE);
 477
 478    _mesa_PopClientAttrib();
 479
 480    free(buf);
 481 }
 482
 483
 484 void
 485 _mesa_dump_depth_buffer(const char *filename)
 486 {
 487    GET_CURRENT_CONTEXT(ctx);
 488    const GLuint w = ctx->DrawBuffer->Width;
 489    const GLuint h = ctx->DrawBuffer->Height;
 490    GLuint *buf;
 491    GLubyte *buf2;
 492    GLuint i;
 493
 494    buf = (GLuint *) malloc(w * h * 4);  /* 4 bpp */
 495    buf2 = (GLubyte *) malloc(w * h * 3); /* 3 bpp */
 496
 497    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 498    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 499    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 500
 501    _mesa_ReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buf);
 502
 503    /* spread 24 bits of Z across R, G, B */
 504    for (i = 0; i < w * h; i++) {
 505       buf2[i*3+0] = (buf[i] >> 24) & 0xff;
 506       buf2[i*3+1] = (buf[i] >> 16) & 0xff;
 507       buf2[i*3+2] = (buf[i] >>  8) & 0xff;
 508    }
 509
 510    printf("Writing %d x %d depth buffer to %s\n", w, h, filename);
 511    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 512
 513    _mesa_PopClientAttrib();
 514
 515    free(buf);
 516    free(buf2);
 517 }
 518
 519
 520 void
 521 _mesa_dump_stencil_buffer(const char *filename)
 522 {
 523    GET_CURRENT_CONTEXT(ctx);
 524    const GLuint w = ctx->DrawBuffer->Width;
 525    const GLuint h = ctx->DrawBuffer->Height;
 526    GLubyte *buf;
 527    GLubyte *buf2;
 528    GLuint i;
 529
 530    buf = (GLubyte *) malloc(w * h);  /* 1 bpp */
 531    buf2 = (GLubyte *) malloc(w * h * 3); /* 3 bpp */
 532
 533    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 534    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 535    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 536
 537    _mesa_ReadPixels(0, 0, w, h, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
 538
 539    for (i = 0; i < w * h; i++) {
 540       buf2[i*3+0] = buf[i];
 541       buf2[i*3+1] = (buf[i] & 127) * 2;
 542       buf2[i*3+2] = (buf[i] - 128) * 2;
 543    }
 544
 545    printf("Writing %d x %d stencil buffer to %s\n", w, h, filename);
 546    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 547
 548    _mesa_PopClientAttrib();
 549
 550    free(buf);
 551    free(buf2);
 552 }
 553
 554
 555 /**
 556  * Quick and dirty function to "print" a texture to stdout.
 557  */
 558 void
 559 _mesa_print_texture(struct gl_context *ctx, const struct gl_texture_image *img)
 560 {
 561 #if CHAN_TYPE != GL_UNSIGNED_BYTE
 562    _mesa_problem(NULL, "PrintTexture not supported");
 563 #else
 564    GLuint i, j, c;
 565    const GLubyte *data = (const GLubyte *) img->Data;
 566
 567    if (!data) {
 568       printf("No texture data\n");
 569       return;
 570    }
 571
 572    /* XXX add more formats or make into a new format utility function */
 573    switch (img->TexFormat) {
 574       case MESA_FORMAT_A8:
 575       case MESA_FORMAT_L8:
 576       case MESA_FORMAT_I8:
 577       case MESA_FORMAT_CI8:
 578          c = 1;
 579          break;
 580       case MESA_FORMAT_AL88:
 581       case MESA_FORMAT_AL88_REV:
 582          c = 2;
 583          break;
 584       case MESA_FORMAT_RGB888:
 585       case MESA_FORMAT_BGR888:
 586          c = 3;
 587          break;
 588       case MESA_FORMAT_RGBA8888:
 589       case MESA_FORMAT_ARGB8888:
 590          c = 4;
 591          break;
 592       default:
 593          _mesa_problem(NULL, "error in PrintTexture\n");
 594          return;
 595    }
 596
 597    for (i = 0; i < img->Height; i++) {
 598       for (j = 0; j < img->Width; j++) {
 599          if (c==1)
 600             printf("%02x  ", data[0]);
 601          else if (c==2)
 602             printf("%02x%02x  ", data[0], data[1]);
 603          else if (c==3)
 604             printf("%02x%02x%02x  ", data[0], data[1], data[2]);
 605          else if (c==4)
 606             printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
 607          data += (img->RowStride - img->Width) * c;
 608       }
 609       /* XXX use img->ImageStride here */
 610       printf("\n");
 611    }
 612 #endif
 613 }