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_COLOR_MATRIX)    ? "ctx->ColorMatrix, " : "",
  95            (state & _NEW_ACCUM)           ? "ctx->Accum, " : "",
  96            (state & _NEW_COLOR)           ? "ctx->Color, " : "",
  97            (state & _NEW_DEPTH)           ? "ctx->Depth, " : "",
  98            (state & _NEW_EVAL)            ? "ctx->Eval/EvalMap, " : "",
  99            (state & _NEW_FOG)             ? "ctx->Fog, " : "",
 100            (state & _NEW_HINT)            ? "ctx->Hint, " : "",
 101            (state & _NEW_LIGHT)           ? "ctx->Light, " : "",
 102            (state & _NEW_LINE)            ? "ctx->Line, " : "",
 103            (state & _NEW_PIXEL)           ? "ctx->Pixel, " : "",
 104            (state & _NEW_POINT)           ? "ctx->Point, " : "",
 105            (state & _NEW_POLYGON)         ? "ctx->Polygon, " : "",
 106            (state & _NEW_POLYGONSTIPPLE)  ? "ctx->PolygonStipple, " : "",
 107            (state & _NEW_SCISSOR)         ? "ctx->Scissor, " : "",
 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%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_LINE_WIDTH)          ? "line-wide, " : "",
 137            (flags & DD_POINT_SMOOTH)        ? "point-smooth, " : "",
 138            (flags & DD_POINT_SIZE)          ? "point-size, " : "",
 139            (flags & DD_POINT_ATTEN)         ? "point-atten, " : "",
 140            (flags & DD_TRI_CULL_FRONT_BACK) ? "cull-all, " : ""
 141       );
 142 }
 143
 144
 145 /**
 146  * Print information about this Mesa version and build options.
 147  */
 148 void _mesa_print_info( void )
 149 {
 150    _mesa_debug(NULL, "Mesa GL_VERSION = %s\n",
 151            (char *) _mesa_GetString(GL_VERSION));
 152    _mesa_debug(NULL, "Mesa GL_RENDERER = %s\n",
 153            (char *) _mesa_GetString(GL_RENDERER));
 154    _mesa_debug(NULL, "Mesa GL_VENDOR = %s\n",
 155            (char *) _mesa_GetString(GL_VENDOR));
 156    _mesa_debug(NULL, "Mesa GL_EXTENSIONS = %s\n",
 157            (char *) _mesa_GetString(GL_EXTENSIONS));
 158 #if defined(THREADS)
 159    _mesa_debug(NULL, "Mesa thread-safe: YES\n");
 160 #else
 161    _mesa_debug(NULL, "Mesa thread-safe: NO\n");
 162 #endif
 163 #if defined(USE_X86_ASM)
 164    _mesa_debug(NULL, "Mesa x86-optimized: YES\n");
 165 #else
 166    _mesa_debug(NULL, "Mesa x86-optimized: NO\n");
 167 #endif
 168 #if defined(USE_SPARC_ASM)
 169    _mesa_debug(NULL, "Mesa sparc-optimized: YES\n");
 170 #else
 171    _mesa_debug(NULL, "Mesa sparc-optimized: NO\n");
 172 #endif
 173 }
 174
 175
 176 /**
 177  * Set the debugging flags.
 178  *
 179  * \param debug debug string
 180  *
 181  * If compiled with debugging support then search for keywords in \p debug and
 182  * enables the verbose debug output of the respective feature.
 183  */
 184 static void add_debug_flags( const char *debug )
 185 {
 186 #ifdef DEBUG
 187    struct debug_option {
 188       const char *name;
 189       GLbitfield flag;
 190    };
 191    static const struct debug_option debug_opt[] = {
 192       { "varray",    VERBOSE_VARRAY },
 193       { "tex",       VERBOSE_TEXTURE },
 194       { "mat",       VERBOSE_MATERIAL },
 195       { "pipe",      VERBOSE_PIPELINE },
 196       { "driver",    VERBOSE_DRIVER },
 197       { "state",     VERBOSE_STATE },
 198       { "api",       VERBOSE_API },
 199       { "list",      VERBOSE_DISPLAY_LIST },
 200       { "lighting",  VERBOSE_LIGHTING },
 201       { "disassem",  VERBOSE_DISASSEM },
 202       { "draw",      VERBOSE_DRAW },
 203       { "swap",      VERBOSE_SWAPBUFFERS }
 204    };
 205    GLuint i;
 206
 207    MESA_VERBOSE = 0x0;
 208    for (i = 0; i < Elements(debug_opt); i++) {
 209       if (strstr(debug, debug_opt[i].name))
 210          MESA_VERBOSE |= debug_opt[i].flag;
 211    }
 212
 213    /* Debug flag:
 214     */
 215    if (strstr(debug, "flush"))
 216       MESA_DEBUG_FLAGS |= DEBUG_ALWAYS_FLUSH;
 217
 218 #if defined(_FPU_GETCW) && defined(_FPU_SETCW)
 219    if (strstr(debug, "fpexceptions")) {
 220       /* raise FP exceptions */
 221       fpu_control_t mask;
 222       _FPU_GETCW(mask);
 223       mask &= ~(_FPU_MASK_IM | _FPU_MASK_DM | _FPU_MASK_ZM
 224                 | _FPU_MASK_OM | _FPU_MASK_UM);
 225       _FPU_SETCW(mask);
 226    }
 227 #endif
 228
 229 #else
 230    (void) debug;
 231 #endif
 232 }
 233
 234
 235 void
 236 _mesa_init_debug( GLcontext *ctx )
 237 {
 238    char *c;
 239
 240    /* Dither disable */
 241    ctx->NoDither = _mesa_getenv("MESA_NO_DITHER") ? GL_TRUE : GL_FALSE;
 242    if (ctx->NoDither) {
 243       if (_mesa_getenv("MESA_DEBUG")) {
 244          _mesa_debug(ctx, "MESA_NO_DITHER set - dithering disabled\n");
 245       }
 246       ctx->Color.DitherFlag = GL_FALSE;
 247    }
 248
 249    c = _mesa_getenv("MESA_DEBUG");
 250    if (c)
 251       add_debug_flags(c);
 252
 253    c = _mesa_getenv("MESA_VERBOSE");
 254    if (c)
 255       add_debug_flags(c);
 256 }
 257
 258
 259 /*
 260  * Write ppm file
 261  */
 262 static void
 263 write_ppm(const char *filename, const GLubyte *buffer, int width, int height,
 264           int comps, int rcomp, int gcomp, int bcomp, GLboolean invert)
 265 {
 266    FILE *f = fopen( filename, "w" );
 267    if (f) {
 268       int x, y;
 269       const GLubyte *ptr = buffer;
 270       fprintf(f,"P6\n");
 271       fprintf(f,"# ppm-file created by osdemo.c\n");
 272       fprintf(f,"%i %i\n", width,height);
 273       fprintf(f,"255\n");
 274       fclose(f);
 275       f = fopen( filename, "ab" );  /* reopen in binary append mode */
 276       for (y=0; y < height; y++) {
 277          for (x = 0; x < width; x++) {
 278             int yy = invert ? (height - 1 - y) : y;
 279             int i = (yy * width + x) * comps;
 280             fputc(ptr[i+rcomp], f); /* write red */
 281             fputc(ptr[i+gcomp], f); /* write green */
 282             fputc(ptr[i+bcomp], f); /* write blue */
 283          }
 284       }
 285       fclose(f);
 286    }
 287 }
 288
 289
 290 /**
 291  * Write a texture image to a ppm file.
 292  * \param face  cube face in [0,5]
 293  * \param level  mipmap level
 294  */
 295 static void
 296 write_texture_image(struct gl_texture_object *texObj,
 297                     GLuint face, GLuint level)
 298 {
 299    struct gl_texture_image *img = texObj->Image[face][level];
 300    if (img) {
 301       GET_CURRENT_CONTEXT(ctx);
 302       struct gl_pixelstore_attrib store;
 303       GLubyte *buffer;
 304       char s[100];
 305
 306       buffer = (GLubyte *) malloc(img->Width * img->Height
 307                                         * img->Depth * 4);
 308
 309       store = ctx->Pack; /* save */
 310       ctx->Pack = ctx->DefaultPacking;
 311
 312       ctx->Driver.GetTexImage(ctx, texObj->Target, level,
 313                               GL_RGBA, GL_UNSIGNED_BYTE,
 314                               buffer, texObj, img);
 315
 316       /* make filename */
 317       sprintf(s, "/tmp/tex%u.l%u.f%u.ppm", texObj->Name, level, face);
 318
 319       printf("  Writing image level %u to %s\n", level, s);
 320       write_ppm(s, buffer, img->Width, img->Height, 4, 0, 1, 2, GL_FALSE);
 321
 322       ctx->Pack = store; /* restore */
 323
 324       free(buffer);
 325    }
 326 }
 327
 328
 329 /**
 330  * Write renderbuffer image to a ppm file.
 331  */
 332 static void
 333 write_renderbuffer_image(const struct gl_renderbuffer *rb)
 334 {
 335    GET_CURRENT_CONTEXT(ctx);
 336    GLubyte *buffer;
 337    char s[100];
 338    GLenum format, type;
 339
 340    if (rb->_BaseFormat == GL_RGB ||
 341        rb->_BaseFormat == GL_RGBA) {
 342       format = GL_RGBA;
 343       type = GL_UNSIGNED_BYTE;
 344    }
 345    else if (rb->_BaseFormat == GL_DEPTH_STENCIL) {
 346       format = GL_DEPTH_STENCIL;
 347       type = GL_UNSIGNED_INT_24_8;
 348    }
 349    else {
 350       return;
 351    }
 352
 353    buffer = (GLubyte *) malloc(rb->Width * rb->Height * 4);
 354
 355    ctx->Driver.ReadPixels(ctx, 0, 0, rb->Width, rb->Height,
 356                           format, type, &ctx->DefaultPacking, buffer);
 357
 358    /* make filename */
 359    sprintf(s, "/tmp/renderbuffer%u.ppm", rb->Name);
 360
 361    printf("  Writing renderbuffer image to %s\n", s);
 362    write_ppm(s, buffer, rb->Width, rb->Height, 4, 0, 1, 2, GL_TRUE);
 363
 364    free(buffer);
 365 }
 366
 367
 368 /** How many texture images (mipmap levels, faces) to write to files */
 369 #define WRITE_NONE 0
 370 #define WRITE_ONE  1
 371 #define WRITE_ALL  2
 372
 373 static GLuint WriteImages;
 374
 375
 376 static void
 377 dump_texture(struct gl_texture_object *texObj, GLuint writeImages)
 378 {
 379    const GLuint numFaces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
 380    GLboolean written = GL_FALSE;
 381    GLuint i, j;
 382
 383    printf("Texture %u\n", texObj->Name);
 384    printf("  Target %s\n", tex_target_name(texObj->Target));
 385    for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 386       for (j = 0; j < numFaces; j++) {
 387          struct gl_texture_image *texImg = texObj->Image[j][i];
 388          if (texImg) {
 389             printf("  Face %u level %u: %d x %d x %d, format %s at %p\n",
 390                    j, i,
 391                    texImg->Width, texImg->Height, texImg->Depth,
 392                    _mesa_get_format_name(texImg->TexFormat),
 393                    texImg->Data);
 394             if (writeImages == WRITE_ALL ||
 395                 (writeImages == WRITE_ONE && !written)) {
 396                write_texture_image(texObj, j, i);
 397                written = GL_TRUE;
 398             }
 399          }
 400       }
 401    }
 402 }
 403
 404
 405 /**
 406  * Dump a single texture.
 407  */
 408 void
 409 _mesa_dump_texture(GLuint texture, GLuint writeImages)
 410 {
 411    GET_CURRENT_CONTEXT(ctx);
 412    struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, texture);
 413    if (texObj) {
 414       dump_texture(texObj, writeImages);
 415    }
 416 }
 417
 418
 419 static void
 420 dump_texture_cb(GLuint id, void *data, void *userData)
 421 {
 422    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 423    (void) userData;
 424    dump_texture(texObj, WriteImages);
 425 }
 426
 427
 428 /**
 429  * Print basic info about all texture objext to stdout.
 430  * If dumpImages is true, write PPM of level[0] image to a file.
 431  */
 432 void
 433 _mesa_dump_textures(GLuint writeImages)
 434 {
 435    GET_CURRENT_CONTEXT(ctx);
 436    WriteImages = writeImages;
 437    _mesa_HashWalk(ctx->Shared->TexObjects, dump_texture_cb, ctx);
 438 }
 439
 440
 441 static void
 442 dump_renderbuffer(const struct gl_renderbuffer *rb, GLboolean writeImage)
 443 {
 444    printf("Renderbuffer %u: %u x %u  IntFormat = %s\n",
 445           rb->Name, rb->Width, rb->Height,
 446           _mesa_lookup_enum_by_nr(rb->InternalFormat));
 447    if (writeImage) {
 448       write_renderbuffer_image(rb);
 449    }
 450 }
 451
 452
 453 static void
 454 dump_renderbuffer_cb(GLuint id, void *data, void *userData)
 455 {
 456    const struct gl_renderbuffer *rb = (const struct gl_renderbuffer *) data;
 457    (void) userData;
 458    dump_renderbuffer(rb, WriteImages);
 459 }
 460
 461
 462 /**
 463  * Print basic info about all renderbuffers to stdout.
 464  * If dumpImages is true, write PPM of level[0] image to a file.
 465  */
 466 void
 467 _mesa_dump_renderbuffers(GLboolean writeImages)
 468 {
 469    GET_CURRENT_CONTEXT(ctx);
 470    WriteImages = writeImages;
 471    _mesa_HashWalk(ctx->Shared->RenderBuffers, dump_renderbuffer_cb, ctx);
 472 }
 473
 474
 475
 476 void
 477 _mesa_dump_color_buffer(const char *filename)
 478 {
 479    GET_CURRENT_CONTEXT(ctx);
 480    const GLuint w = ctx->DrawBuffer->Width;
 481    const GLuint h = ctx->DrawBuffer->Height;
 482    GLubyte *buf;
 483
 484    buf = (GLubyte *) malloc(w * h * 4);
 485
 486    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 487    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 488    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 489
 490    _mesa_ReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
 491
 492    printf("ReadBuffer %p 0x%x  DrawBuffer %p 0x%x\n",
 493           (void *) ctx->ReadBuffer->_ColorReadBuffer,
 494           ctx->ReadBuffer->ColorReadBuffer,
 495           (void *) ctx->DrawBuffer->_ColorDrawBuffers[0],
 496           ctx->DrawBuffer->ColorDrawBuffer[0]);
 497    printf("Writing %d x %d color buffer to %s\n", w, h, filename);
 498    write_ppm(filename, buf, w, h, 4, 0, 1, 2, GL_TRUE);
 499
 500    _mesa_PopClientAttrib();
 501
 502    free(buf);
 503 }
 504
 505
 506 void
 507 _mesa_dump_depth_buffer(const char *filename)
 508 {
 509    GET_CURRENT_CONTEXT(ctx);
 510    const GLuint w = ctx->DrawBuffer->Width;
 511    const GLuint h = ctx->DrawBuffer->Height;
 512    GLuint *buf;
 513    GLubyte *buf2;
 514    GLuint i;
 515
 516    buf = (GLuint *) malloc(w * h * 4);  /* 4 bpp */
 517    buf2 = (GLubyte *) malloc(w * h * 3); /* 3 bpp */
 518
 519    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 520    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 521    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 522
 523    _mesa_ReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buf);
 524
 525    /* spread 24 bits of Z across R, G, B */
 526    for (i = 0; i < w * h; i++) {
 527       buf2[i*3+0] = (buf[i] >> 24) & 0xff;
 528       buf2[i*3+1] = (buf[i] >> 16) & 0xff;
 529       buf2[i*3+2] = (buf[i] >>  8) & 0xff;
 530    }
 531
 532    printf("Writing %d x %d depth buffer to %s\n", w, h, filename);
 533    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 534
 535    _mesa_PopClientAttrib();
 536
 537    free(buf);
 538    free(buf2);
 539 }
 540
 541
 542 void
 543 _mesa_dump_stencil_buffer(const char *filename)
 544 {
 545    GET_CURRENT_CONTEXT(ctx);
 546    const GLuint w = ctx->DrawBuffer->Width;
 547    const GLuint h = ctx->DrawBuffer->Height;
 548    GLubyte *buf;
 549    GLubyte *buf2;
 550    GLuint i;
 551
 552    buf = (GLubyte *) malloc(w * h);  /* 1 bpp */
 553    buf2 = (GLubyte *) malloc(w * h * 3); /* 3 bpp */
 554
 555    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 556    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 557    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 558
 559    _mesa_ReadPixels(0, 0, w, h, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
 560
 561    for (i = 0; i < w * h; i++) {
 562       buf2[i*3+0] = buf[i];
 563       buf2[i*3+1] = (buf[i] & 127) * 2;
 564       buf2[i*3+2] = (buf[i] - 128) * 2;
 565    }
 566
 567    printf("Writing %d x %d stencil buffer to %s\n", w, h, filename);
 568    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 569
 570    _mesa_PopClientAttrib();
 571
 572    free(buf);
 573    free(buf2);
 574 }
 575
 576
 577 /**
 578  * Quick and dirty function to "print" a texture to stdout.
 579  */
 580 void
 581 _mesa_print_texture(GLcontext *ctx, const struct gl_texture_image *img)
 582 {
 583 #if CHAN_TYPE != GL_UNSIGNED_BYTE
 584    _mesa_problem(NULL, "PrintTexture not supported");
 585 #else
 586    GLuint i, j, c;
 587    const GLubyte *data = (const GLubyte *) img->Data;
 588
 589    if (!data) {
 590       printf("No texture data\n");
 591       return;
 592    }
 593
 594    /* XXX add more formats or make into a new format utility function */
 595    switch (img->TexFormat) {
 596       case MESA_FORMAT_A8:
 597       case MESA_FORMAT_L8:
 598       case MESA_FORMAT_I8:
 599       case MESA_FORMAT_CI8:
 600          c = 1;
 601          break;
 602       case MESA_FORMAT_AL88:
 603       case MESA_FORMAT_AL88_REV:
 604          c = 2;
 605          break;
 606       case MESA_FORMAT_RGB888:
 607       case MESA_FORMAT_BGR888:
 608          c = 3;
 609          break;
 610       case MESA_FORMAT_RGBA8888:
 611       case MESA_FORMAT_ARGB8888:
 612          c = 4;
 613          break;
 614       default:
 615          _mesa_problem(NULL, "error in PrintTexture\n");
 616          return;
 617    }
 618
 619    for (i = 0; i < img->Height; i++) {
 620       for (j = 0; j < img->Width; j++) {
 621          if (c==1)
 622             printf("%02x  ", data[0]);
 623          else if (c==2)
 624             printf("%02x%02x  ", data[0], data[1]);
 625          else if (c==3)
 626             printf("%02x%02x%02x  ", data[0], data[1], data[2]);
 627          else if (c==4)
 628             printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
 629          data += (img->RowStride - img->Width) * c;
 630       }
 631       /* XXX use img->ImageStride here */
 632       printf("\n");
 633    }
 634 #endif
 635 }