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 /**
  41  * Primitive names
  42  */
  43 const char *_mesa_prim_name[GL_POLYGON+4] = {
  44    "GL_POINTS",
  45    "GL_LINES",
  46    "GL_LINE_LOOP",
  47    "GL_LINE_STRIP",
  48    "GL_TRIANGLES",
  49    "GL_TRIANGLE_STRIP",
  50    "GL_TRIANGLE_FAN",
  51    "GL_QUADS",
  52    "GL_QUAD_STRIP",
  53    "GL_POLYGON",
  54    "outside begin/end",
  55    "inside unknown primitive",
  56    "unknown state"
  57 };
  58
  59
  60 static const char *
  61 tex_target_name(GLenum tgt)
  62 {
  63    static const struct {
  64       GLenum target;
  65       const char *name;
  66    } tex_targets[] = {
  67       { GL_TEXTURE_1D, "GL_TEXTURE_1D" },
  68       { GL_TEXTURE_2D, "GL_TEXTURE_2D" },
  69       { GL_TEXTURE_3D, "GL_TEXTURE_3D" },
  70       { GL_TEXTURE_CUBE_MAP, "GL_TEXTURE_CUBE_MAP" },
  71       { GL_TEXTURE_RECTANGLE, "GL_TEXTURE_RECTANGLE" },
  72       { GL_TEXTURE_1D_ARRAY_EXT, "GL_TEXTURE_1D_ARRAY" },
  73       { GL_TEXTURE_2D_ARRAY_EXT, "GL_TEXTURE_2D_ARRAY" }
  74    };
  75    GLuint i;
  76    for (i = 0; i < Elements(tex_targets); i++) {
  77       if (tex_targets[i].target == tgt)
  78          return tex_targets[i].name;
  79    }
  80    return "UNKNOWN TEX TARGET";
  81 }
  82
  83
  84 void
  85 _mesa_print_state( const char *msg, GLuint state )
  86 {
  87    _mesa_debug(NULL,
  88            "%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",
  89            msg,
  90            state,
  91            (state & _NEW_MODELVIEW)       ? "ctx->ModelView, " : "",
  92            (state & _NEW_PROJECTION)      ? "ctx->Projection, " : "",
  93            (state & _NEW_TEXTURE_MATRIX)  ? "ctx->TextureMatrix, " : "",
  94            (state & _NEW_ACCUM)           ? "ctx->Accum, " : "",
  95            (state & _NEW_COLOR)           ? "ctx->Color, " : "",
  96            (state & _NEW_DEPTH)           ? "ctx->Depth, " : "",
  97            (state & _NEW_EVAL)            ? "ctx->Eval/EvalMap, " : "",
  98            (state & _NEW_FOG)             ? "ctx->Fog, " : "",
  99            (state & _NEW_HINT)            ? "ctx->Hint, " : "",
 100            (state & _NEW_LIGHT)           ? "ctx->Light, " : "",
 101            (state & _NEW_LINE)            ? "ctx->Line, " : "",
 102            (state & _NEW_PIXEL)           ? "ctx->Pixel, " : "",
 103            (state & _NEW_POINT)           ? "ctx->Point, " : "",
 104            (state & _NEW_POLYGON)         ? "ctx->Polygon, " : "",
 105            (state & _NEW_POLYGONSTIPPLE)  ? "ctx->PolygonStipple, " : "",
 106            (state & _NEW_SCISSOR)         ? "ctx->Scissor, " : "",
 107            (state & _NEW_STENCIL)         ? "ctx->Stencil, " : "",
 108            (state & _NEW_TEXTURE)         ? "ctx->Texture, " : "",
 109            (state & _NEW_TRANSFORM)       ? "ctx->Transform, " : "",
 110            (state & _NEW_VIEWPORT)        ? "ctx->Viewport, " : "",
 111            (state & _NEW_PACKUNPACK)      ? "ctx->Pack/Unpack, " : "",
 112            (state & _NEW_ARRAY)           ? "ctx->Array, " : "",
 113            (state & _NEW_RENDERMODE)      ? "ctx->RenderMode, " : "",
 114            (state & _NEW_BUFFERS)         ? "ctx->Visual, ctx->DrawBuffer,, " : "");
 115 }
 116
 117
 118
 119 void
 120 _mesa_print_tri_caps( const char *name, GLuint flags )
 121 {
 122    _mesa_debug(NULL,
 123            "%s: (0x%x) %s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 124            name,
 125            flags,
 126            (flags & DD_FLATSHADE)           ? "flat-shade, " : "",
 127            (flags & DD_SEPARATE_SPECULAR)   ? "separate-specular, " : "",
 128            (flags & DD_TRI_LIGHT_TWOSIDE)   ? "tri-light-twoside, " : "",
 129            (flags & DD_TRI_TWOSTENCIL)      ? "tri-twostencil, " : "",
 130            (flags & DD_TRI_UNFILLED)        ? "tri-unfilled, " : "",
 131            (flags & DD_TRI_STIPPLE)         ? "tri-stipple, " : "",
 132            (flags & DD_TRI_OFFSET)          ? "tri-offset, " : "",
 133            (flags & DD_TRI_SMOOTH)          ? "tri-smooth, " : "",
 134            (flags & DD_LINE_SMOOTH)         ? "line-smooth, " : "",
 135            (flags & DD_LINE_STIPPLE)        ? "line-stipple, " : "",
 136            (flags & DD_POINT_SMOOTH)        ? "point-smooth, " : "",
 137            (flags & DD_POINT_ATTEN)         ? "point-atten, " : "",
 138            (flags & DD_TRI_CULL_FRONT_BACK) ? "cull-all, " : ""
 139       );
 140 }
 141
 142
 143 /**
 144  * Print information about this Mesa version and build options.
 145  */
 146 void _mesa_print_info( void )
 147 {
 148    _mesa_debug(NULL, "Mesa GL_VERSION = %s\n",
 149            (char *) _mesa_GetString(GL_VERSION));
 150    _mesa_debug(NULL, "Mesa GL_RENDERER = %s\n",
 151            (char *) _mesa_GetString(GL_RENDERER));
 152    _mesa_debug(NULL, "Mesa GL_VENDOR = %s\n",
 153            (char *) _mesa_GetString(GL_VENDOR));
 154    _mesa_debug(NULL, "Mesa GL_EXTENSIONS = %s\n",
 155            (char *) _mesa_GetString(GL_EXTENSIONS));
 156 #if defined(THREADS)
 157    _mesa_debug(NULL, "Mesa thread-safe: YES\n");
 158 #else
 159    _mesa_debug(NULL, "Mesa thread-safe: NO\n");
 160 #endif
 161 #if defined(USE_X86_ASM)
 162    _mesa_debug(NULL, "Mesa x86-optimized: YES\n");
 163 #else
 164    _mesa_debug(NULL, "Mesa x86-optimized: NO\n");
 165 #endif
 166 #if defined(USE_SPARC_ASM)
 167    _mesa_debug(NULL, "Mesa sparc-optimized: YES\n");
 168 #else
 169    _mesa_debug(NULL, "Mesa sparc-optimized: NO\n");
 170 #endif
 171 }
 172
 173
 174 /**
 175  * Set the debugging flags.
 176  *
 177  * \param debug debug string
 178  *
 179  * If compiled with debugging support then search for keywords in \p debug and
 180  * enables the verbose debug output of the respective feature.
 181  */
 182 static void add_debug_flags( const char *debug )
 183 {
 184 #ifdef DEBUG
 185    struct debug_option {
 186       const char *name;
 187       GLbitfield flag;
 188    };
 189    static const struct debug_option debug_opt[] = {
 190       { "varray",    VERBOSE_VARRAY },
 191       { "tex",       VERBOSE_TEXTURE },
 192       { "mat",       VERBOSE_MATERIAL },
 193       { "pipe",      VERBOSE_PIPELINE },
 194       { "driver",    VERBOSE_DRIVER },
 195       { "state",     VERBOSE_STATE },
 196       { "api",       VERBOSE_API },
 197       { "list",      VERBOSE_DISPLAY_LIST },
 198       { "lighting",  VERBOSE_LIGHTING },
 199       { "disassem",  VERBOSE_DISASSEM },
 200       { "draw",      VERBOSE_DRAW },
 201       { "swap",      VERBOSE_SWAPBUFFERS }
 202    };
 203    GLuint i;
 204
 205    MESA_VERBOSE = 0x0;
 206    for (i = 0; i < Elements(debug_opt); i++) {
 207       if (strstr(debug, debug_opt[i].name))
 208          MESA_VERBOSE |= debug_opt[i].flag;
 209    }
 210
 211    /* Debug flag:
 212     */
 213    if (strstr(debug, "flush"))
 214       MESA_DEBUG_FLAGS |= DEBUG_ALWAYS_FLUSH;
 215
 216 #if defined(_FPU_GETCW) && defined(_FPU_SETCW)
 217    if (strstr(debug, "fpexceptions")) {
 218       /* raise FP exceptions */
 219       fpu_control_t mask;
 220       _FPU_GETCW(mask);
 221       mask &= ~(_FPU_MASK_IM | _FPU_MASK_DM | _FPU_MASK_ZM
 222                 | _FPU_MASK_OM | _FPU_MASK_UM);
 223       _FPU_SETCW(mask);
 224    }
 225 #endif
 226
 227 #else
 228    (void) debug;
 229 #endif
 230 }
 231
 232
 233 void
 234 _mesa_init_debug( struct gl_context *ctx )
 235 {
 236    char *c;
 237
 238    /* Dither disable */
 239    ctx->NoDither = _mesa_getenv("MESA_NO_DITHER") ? GL_TRUE : GL_FALSE;
 240    if (ctx->NoDither) {
 241       if (_mesa_getenv("MESA_DEBUG")) {
 242          _mesa_debug(ctx, "MESA_NO_DITHER set - dithering disabled\n");
 243       }
 244       ctx->Color.DitherFlag = GL_FALSE;
 245    }
 246
 247    c = _mesa_getenv("MESA_DEBUG");
 248    if (c)
 249       add_debug_flags(c);
 250
 251    c = _mesa_getenv("MESA_VERBOSE");
 252    if (c)
 253       add_debug_flags(c);
 254 }
 255
 256
 257 /*
 258  * Write ppm file
 259  */
 260 static void
 261 write_ppm(const char *filename, const GLubyte *buffer, int width, int height,
 262           int comps, int rcomp, int gcomp, int bcomp, GLboolean invert)
 263 {
 264    FILE *f = fopen( filename, "w" );
 265    if (f) {
 266       int x, y;
 267       const GLubyte *ptr = buffer;
 268       fprintf(f,"P6\n");
 269       fprintf(f,"# ppm-file created by osdemo.c\n");
 270       fprintf(f,"%i %i\n", width,height);
 271       fprintf(f,"255\n");
 272       fclose(f);
 273       f = fopen( filename, "ab" );  /* reopen in binary append mode */
 274       for (y=0; y < height; y++) {
 275          for (x = 0; x < width; x++) {
 276             int yy = invert ? (height - 1 - y) : y;
 277             int i = (yy * width + x) * comps;
 278             fputc(ptr[i+rcomp], f); /* write red */
 279             fputc(ptr[i+gcomp], f); /* write green */
 280             fputc(ptr[i+bcomp], f); /* write blue */
 281          }
 282       }
 283       fclose(f);
 284    }
 285 }
 286
 287
 288 /**
 289  * Write a texture image to a ppm file.
 290  * \param face  cube face in [0,5]
 291  * \param level  mipmap level
 292  */
 293 static void
 294 write_texture_image(struct gl_texture_object *texObj,
 295                     GLuint face, GLuint level)
 296 {
 297    struct gl_texture_image *img = texObj->Image[face][level];
 298    if (img) {
 299       GET_CURRENT_CONTEXT(ctx);
 300       struct gl_pixelstore_attrib store;
 301       GLubyte *buffer;
 302       char s[100];
 303
 304       buffer = (GLubyte *) malloc(img->Width * img->Height
 305                                         * img->Depth * 4);
 306
 307       store = ctx->Pack; /* save */
 308       ctx->Pack = ctx->DefaultPacking;
 309
 310       ctx->Driver.GetTexImage(ctx, texObj->Target, level,
 311                               GL_RGBA, GL_UNSIGNED_BYTE,
 312                               buffer, texObj, img);
 313
 314       /* make filename */
 315       _mesa_snprintf(s, sizeof(s), "/tmp/tex%u.l%u.f%u.ppm", texObj->Name, level, face);
 316
 317       printf("  Writing image level %u to %s\n", level, s);
 318       write_ppm(s, buffer, img->Width, img->Height, 4, 0, 1, 2, GL_FALSE);
 319
 320       ctx->Pack = store; /* restore */
 321
 322       free(buffer);
 323    }
 324 }
 325
 326
 327 /**
 328  * Write renderbuffer image to a ppm file.
 329  */
 330 static void
 331 write_renderbuffer_image(const struct gl_renderbuffer *rb)
 332 {
 333    GET_CURRENT_CONTEXT(ctx);
 334    GLubyte *buffer;
 335    char s[100];
 336    GLenum format, type;
 337
 338    if (rb->_BaseFormat == GL_RGB ||
 339        rb->_BaseFormat == GL_RGBA) {
 340       format = GL_RGBA;
 341       type = GL_UNSIGNED_BYTE;
 342    }
 343    else if (rb->_BaseFormat == GL_DEPTH_STENCIL) {
 344       format = GL_DEPTH_STENCIL;
 345       type = GL_UNSIGNED_INT_24_8;
 346    }
 347    else {
 348       return;
 349    }
 350
 351    buffer = (GLubyte *) malloc(rb->Width * rb->Height * 4);
 352
 353    ctx->Driver.ReadPixels(ctx, 0, 0, rb->Width, rb->Height,
 354                           format, type, &ctx->DefaultPacking, buffer);
 355
 356    /* make filename */
 357    _mesa_snprintf(s, sizeof(s), "/tmp/renderbuffer%u.ppm", rb->Name);
 358
 359    printf("  Writing renderbuffer image to %s\n", s);
 360    write_ppm(s, buffer, rb->Width, rb->Height, 4, 0, 1, 2, GL_TRUE);
 361
 362    free(buffer);
 363 }
 364
 365
 366 /** How many texture images (mipmap levels, faces) to write to files */
 367 #define WRITE_NONE 0
 368 #define WRITE_ONE  1
 369 #define WRITE_ALL  2
 370
 371 static GLuint WriteImages;
 372
 373
 374 static void
 375 dump_texture(struct gl_texture_object *texObj, GLuint writeImages)
 376 {
 377    const GLuint numFaces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
 378    GLboolean written = GL_FALSE;
 379    GLuint i, j;
 380
 381    printf("Texture %u\n", texObj->Name);
 382    printf("  Target %s\n", tex_target_name(texObj->Target));
 383    for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 384       for (j = 0; j < numFaces; j++) {
 385          struct gl_texture_image *texImg = texObj->Image[j][i];
 386          if (texImg) {
 387             printf("  Face %u level %u: %d x %d x %d, format %s at %p\n",
 388                    j, i,
 389                    texImg->Width, texImg->Height, texImg->Depth,
 390                    _mesa_get_format_name(texImg->TexFormat),
 391                    texImg->Data);
 392             if (writeImages == WRITE_ALL ||
 393                 (writeImages == WRITE_ONE && !written)) {
 394                write_texture_image(texObj, j, i);
 395                written = GL_TRUE;
 396             }
 397          }
 398       }
 399    }
 400 }
 401
 402
 403 /**
 404  * Dump a single texture.
 405  */
 406 void
 407 _mesa_dump_texture(GLuint texture, GLuint writeImages)
 408 {
 409    GET_CURRENT_CONTEXT(ctx);
 410    struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, texture);
 411    if (texObj) {
 412       dump_texture(texObj, writeImages);
 413    }
 414 }
 415
 416
 417 static void
 418 dump_texture_cb(GLuint id, void *data, void *userData)
 419 {
 420    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 421    (void) userData;
 422    dump_texture(texObj, WriteImages);
 423 }
 424
 425
 426 /**
 427  * Print basic info about all texture objext to stdout.
 428  * If dumpImages is true, write PPM of level[0] image to a file.
 429  */
 430 void
 431 _mesa_dump_textures(GLuint writeImages)
 432 {
 433    GET_CURRENT_CONTEXT(ctx);
 434    WriteImages = writeImages;
 435    _mesa_HashWalk(ctx->Shared->TexObjects, dump_texture_cb, ctx);
 436 }
 437
 438
 439 static void
 440 dump_renderbuffer(const struct gl_renderbuffer *rb, GLboolean writeImage)
 441 {
 442    printf("Renderbuffer %u: %u x %u  IntFormat = %s\n",
 443           rb->Name, rb->Width, rb->Height,
 444           _mesa_lookup_enum_by_nr(rb->InternalFormat));
 445    if (writeImage) {
 446       write_renderbuffer_image(rb);
 447    }
 448 }
 449
 450
 451 static void
 452 dump_renderbuffer_cb(GLuint id, void *data, void *userData)
 453 {
 454    const struct gl_renderbuffer *rb = (const struct gl_renderbuffer *) data;
 455    (void) userData;
 456    dump_renderbuffer(rb, WriteImages);
 457 }
 458
 459
 460 /**
 461  * Print basic info about all renderbuffers to stdout.
 462  * If dumpImages is true, write PPM of level[0] image to a file.
 463  */
 464 void
 465 _mesa_dump_renderbuffers(GLboolean writeImages)
 466 {
 467    GET_CURRENT_CONTEXT(ctx);
 468    WriteImages = writeImages;
 469    _mesa_HashWalk(ctx->Shared->RenderBuffers, dump_renderbuffer_cb, ctx);
 470 }
 471
 472
 473
 474 void
 475 _mesa_dump_color_buffer(const char *filename)
 476 {
 477    GET_CURRENT_CONTEXT(ctx);
 478    const GLuint w = ctx->DrawBuffer->Width;
 479    const GLuint h = ctx->DrawBuffer->Height;
 480    GLubyte *buf;
 481
 482    buf = (GLubyte *) malloc(w * h * 4);
 483
 484    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 485    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 486    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 487
 488    _mesa_ReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
 489
 490    printf("ReadBuffer %p 0x%x  DrawBuffer %p 0x%x\n",
 491           (void *) ctx->ReadBuffer->_ColorReadBuffer,
 492           ctx->ReadBuffer->ColorReadBuffer,
 493           (void *) ctx->DrawBuffer->_ColorDrawBuffers[0],
 494           ctx->DrawBuffer->ColorDrawBuffer[0]);
 495    printf("Writing %d x %d color buffer to %s\n", w, h, filename);
 496    write_ppm(filename, buf, w, h, 4, 0, 1, 2, GL_TRUE);
 497
 498    _mesa_PopClientAttrib();
 499
 500    free(buf);
 501 }
 502
 503
 504 void
 505 _mesa_dump_depth_buffer(const char *filename)
 506 {
 507    GET_CURRENT_CONTEXT(ctx);
 508    const GLuint w = ctx->DrawBuffer->Width;
 509    const GLuint h = ctx->DrawBuffer->Height;
 510    GLuint *buf;
 511    GLubyte *buf2;
 512    GLuint i;
 513
 514    buf = (GLuint *) malloc(w * h * 4);  /* 4 bpp */
 515    buf2 = (GLubyte *) malloc(w * h * 3); /* 3 bpp */
 516
 517    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 518    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 519    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 520
 521    _mesa_ReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buf);
 522
 523    /* spread 24 bits of Z across R, G, B */
 524    for (i = 0; i < w * h; i++) {
 525       buf2[i*3+0] = (buf[i] >> 24) & 0xff;
 526       buf2[i*3+1] = (buf[i] >> 16) & 0xff;
 527       buf2[i*3+2] = (buf[i] >>  8) & 0xff;
 528    }
 529
 530    printf("Writing %d x %d depth buffer to %s\n", w, h, filename);
 531    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 532
 533    _mesa_PopClientAttrib();
 534
 535    free(buf);
 536    free(buf2);
 537 }
 538
 539
 540 void
 541 _mesa_dump_stencil_buffer(const char *filename)
 542 {
 543    GET_CURRENT_CONTEXT(ctx);
 544    const GLuint w = ctx->DrawBuffer->Width;
 545    const GLuint h = ctx->DrawBuffer->Height;
 546    GLubyte *buf;
 547    GLubyte *buf2;
 548    GLuint i;
 549
 550    buf = (GLubyte *) malloc(w * h);  /* 1 bpp */
 551    buf2 = (GLubyte *) malloc(w * h * 3); /* 3 bpp */
 552
 553    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 554    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 555    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 556
 557    _mesa_ReadPixels(0, 0, w, h, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
 558
 559    for (i = 0; i < w * h; i++) {
 560       buf2[i*3+0] = buf[i];
 561       buf2[i*3+1] = (buf[i] & 127) * 2;
 562       buf2[i*3+2] = (buf[i] - 128) * 2;
 563    }
 564
 565    printf("Writing %d x %d stencil buffer to %s\n", w, h, filename);
 566    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 567
 568    _mesa_PopClientAttrib();
 569
 570    free(buf);
 571    free(buf2);
 572 }
 573
 574
 575 /**
 576  * Quick and dirty function to "print" a texture to stdout.
 577  */
 578 void
 579 _mesa_print_texture(struct gl_context *ctx, const struct gl_texture_image *img)
 580 {
 581 #if CHAN_TYPE != GL_UNSIGNED_BYTE
 582    _mesa_problem(NULL, "PrintTexture not supported");
 583 #else
 584    GLuint i, j, c;
 585    const GLubyte *data = (const GLubyte *) img->Data;
 586
 587    if (!data) {
 588       printf("No texture data\n");
 589       return;
 590    }
 591
 592    /* XXX add more formats or make into a new format utility function */
 593    switch (img->TexFormat) {
 594       case MESA_FORMAT_A8:
 595       case MESA_FORMAT_L8:
 596       case MESA_FORMAT_I8:
 597       case MESA_FORMAT_CI8:
 598          c = 1;
 599          break;
 600       case MESA_FORMAT_AL88:
 601       case MESA_FORMAT_AL88_REV:
 602          c = 2;
 603          break;
 604       case MESA_FORMAT_RGB888:
 605       case MESA_FORMAT_BGR888:
 606          c = 3;
 607          break;
 608       case MESA_FORMAT_RGBA8888:
 609       case MESA_FORMAT_ARGB8888:
 610          c = 4;
 611          break;
 612       default:
 613          _mesa_problem(NULL, "error in PrintTexture\n");
 614          return;
 615    }
 616
 617    for (i = 0; i < img->Height; i++) {
 618       for (j = 0; j < img->Width; j++) {
 619          if (c==1)
 620             printf("%02x  ", data[0]);
 621          else if (c==2)
 622             printf("%02x%02x  ", data[0], data[1]);
 623          else if (c==3)
 624             printf("%02x%02x%02x  ", data[0], data[1], data[2]);
 625          else if (c==4)
 626             printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
 627          data += (img->RowStride - img->Width) * c;
 628       }
 629       /* XXX use img->ImageStride here */
 630       printf("\n");
 631    }
 632 #endif
 633 }