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       { GL_TEXTURE_EXTERNAL_OES, "GL_TEXTURE_EXTERNAL_OES" }
  55    };
  56    GLuint i;
  57    for (i = 0; i < Elements(tex_targets); i++) {
  58       if (tex_targets[i].target == tgt)
  59          return tex_targets[i].name;
  60    }
  61    return "UNKNOWN TEX TARGET";
  62 }
  63
  64
  65 void
  66 _mesa_print_state( const char *msg, GLuint state )
  67 {
  68    _mesa_debug(NULL,
  69            "%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\n",
  70            msg,
  71            state,
  72            (state & _NEW_MODELVIEW)       ? "ctx->ModelView, " : "",
  73            (state & _NEW_PROJECTION)      ? "ctx->Projection, " : "",
  74            (state & _NEW_TEXTURE_MATRIX)  ? "ctx->TextureMatrix, " : "",
  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\n",
 104            name,
 105            flags,
 106            (flags & DD_SEPARATE_SPECULAR)   ? "separate-specular, " : "",
 107            (flags & DD_TRI_LIGHT_TWOSIDE)   ? "tri-light-twoside, " : "",
 108            (flags & DD_TRI_UNFILLED)        ? "tri-unfilled, " : "",
 109            (flags & DD_TRI_STIPPLE)         ? "tri-stipple, " : "",
 110            (flags & DD_TRI_OFFSET)          ? "tri-offset, " : "",
 111            (flags & DD_TRI_SMOOTH)          ? "tri-smooth, " : "",
 112            (flags & DD_LINE_SMOOTH)         ? "line-smooth, " : "",
 113            (flags & DD_LINE_STIPPLE)        ? "line-stipple, " : "",
 114            (flags & DD_POINT_SMOOTH)        ? "point-smooth, " : "",
 115            (flags & DD_POINT_ATTEN)         ? "point-atten, " : ""
 116       );
 117 }
 118
 119
 120 /**
 121  * Print information about this Mesa version and build options.
 122  */
 123 void _mesa_print_info( void )
 124 {
 125    _mesa_debug(NULL, "Mesa GL_VERSION = %s\n",
 126            (char *) _mesa_GetString(GL_VERSION));
 127    _mesa_debug(NULL, "Mesa GL_RENDERER = %s\n",
 128            (char *) _mesa_GetString(GL_RENDERER));
 129    _mesa_debug(NULL, "Mesa GL_VENDOR = %s\n",
 130            (char *) _mesa_GetString(GL_VENDOR));
 131    _mesa_debug(NULL, "Mesa GL_EXTENSIONS = %s\n",
 132            (char *) _mesa_GetString(GL_EXTENSIONS));
 133 #if defined(THREADS)
 134    _mesa_debug(NULL, "Mesa thread-safe: YES\n");
 135 #else
 136    _mesa_debug(NULL, "Mesa thread-safe: NO\n");
 137 #endif
 138 #if defined(USE_X86_ASM)
 139    _mesa_debug(NULL, "Mesa x86-optimized: YES\n");
 140 #else
 141    _mesa_debug(NULL, "Mesa x86-optimized: NO\n");
 142 #endif
 143 #if defined(USE_SPARC_ASM)
 144    _mesa_debug(NULL, "Mesa sparc-optimized: YES\n");
 145 #else
 146    _mesa_debug(NULL, "Mesa sparc-optimized: NO\n");
 147 #endif
 148 }
 149
 150
 151 /**
 152  * Set the debugging flags.
 153  *
 154  * \param debug debug string
 155  *
 156  * If compiled with debugging support then search for keywords in \p debug and
 157  * enables the verbose debug output of the respective feature.
 158  */
 159 static void add_debug_flags( const char *debug )
 160 {
 161 #ifdef DEBUG
 162    struct debug_option {
 163       const char *name;
 164       GLbitfield flag;
 165    };
 166    static const struct debug_option debug_opt[] = {
 167       { "varray",    VERBOSE_VARRAY },
 168       { "tex",       VERBOSE_TEXTURE },
 169       { "mat",       VERBOSE_MATERIAL },
 170       { "pipe",      VERBOSE_PIPELINE },
 171       { "driver",    VERBOSE_DRIVER },
 172       { "state",     VERBOSE_STATE },
 173       { "api",       VERBOSE_API },
 174       { "list",      VERBOSE_DISPLAY_LIST },
 175       { "lighting",  VERBOSE_LIGHTING },
 176       { "disassem",  VERBOSE_DISASSEM },
 177       { "draw",      VERBOSE_DRAW },
 178       { "swap",      VERBOSE_SWAPBUFFERS }
 179    };
 180    GLuint i;
 181
 182    MESA_VERBOSE = 0x0;
 183    for (i = 0; i < Elements(debug_opt); i++) {
 184       if (strstr(debug, debug_opt[i].name) || strcmp(debug, "all") == 0)
 185          MESA_VERBOSE |= debug_opt[i].flag;
 186    }
 187
 188    /* Debug flag:
 189     */
 190    if (strstr(debug, "flush"))
 191       MESA_DEBUG_FLAGS |= DEBUG_ALWAYS_FLUSH;
 192
 193 #else
 194    (void) debug;
 195 #endif
 196 }
 197
 198
 199 void
 200 _mesa_init_debug( struct gl_context *ctx )
 201 {
 202    char *c;
 203    c = _mesa_getenv("MESA_DEBUG");
 204    if (c)
 205       add_debug_flags(c);
 206
 207    c = _mesa_getenv("MESA_VERBOSE");
 208    if (c)
 209       add_debug_flags(c);
 210 }
 211
 212
 213 /*
 214  * Write ppm file
 215  */
 216 static void
 217 write_ppm(const char *filename, const GLubyte *buffer, int width, int height,
 218           int comps, int rcomp, int gcomp, int bcomp, GLboolean invert)
 219 {
 220    FILE *f = fopen( filename, "w" );
 221    if (f) {
 222       int x, y;
 223       const GLubyte *ptr = buffer;
 224       fprintf(f,"P6\n");
 225       fprintf(f,"# ppm-file created by osdemo.c\n");
 226       fprintf(f,"%i %i\n", width,height);
 227       fprintf(f,"255\n");
 228       fclose(f);
 229       f = fopen( filename, "ab" );  /* reopen in binary append mode */
 230       for (y=0; y < height; y++) {
 231          for (x = 0; x < width; x++) {
 232             int yy = invert ? (height - 1 - y) : y;
 233             int i = (yy * width + x) * comps;
 234             fputc(ptr[i+rcomp], f); /* write red */
 235             fputc(ptr[i+gcomp], f); /* write green */
 236             fputc(ptr[i+bcomp], f); /* write blue */
 237          }
 238       }
 239       fclose(f);
 240    }
 241    else {
 242       fprintf(stderr, "Unable to create %s in write_ppm()\n", filename);
 243    }
 244 }
 245
 246
 247 /**
 248  * Write a texture image to a ppm file.
 249  * \param face  cube face in [0,5]
 250  * \param level  mipmap level
 251  */
 252 static void
 253 write_texture_image(struct gl_texture_object *texObj,
 254                     GLuint face, GLuint level)
 255 {
 256    struct gl_texture_image *img = texObj->Image[face][level];
 257    if (img) {
 258       GET_CURRENT_CONTEXT(ctx);
 259       struct gl_pixelstore_attrib store;
 260       GLubyte *buffer;
 261       char s[100];
 262
 263       buffer = (GLubyte *) malloc(img->Width * img->Height
 264                                         * img->Depth * 4);
 265
 266       store = ctx->Pack; /* save */
 267       ctx->Pack = ctx->DefaultPacking;
 268
 269       ctx->Driver.GetTexImage(ctx, GL_RGBA, GL_UNSIGNED_BYTE, buffer, img);
 270
 271       /* make filename */
 272       _mesa_snprintf(s, sizeof(s), "/tmp/tex%u.l%u.f%u.ppm", texObj->Name, level, face);
 273
 274       printf("  Writing image level %u to %s\n", level, s);
 275       write_ppm(s, buffer, img->Width, img->Height, 4, 0, 1, 2, GL_FALSE);
 276
 277       ctx->Pack = store; /* restore */
 278
 279       free(buffer);
 280    }
 281 }
 282
 283
 284 /**
 285  * Write renderbuffer image to a ppm file.
 286  */
 287 void
 288 _mesa_write_renderbuffer_image(const struct gl_renderbuffer *rb)
 289 {
 290    GET_CURRENT_CONTEXT(ctx);
 291    GLubyte *buffer;
 292    char s[100];
 293    GLenum format, type;
 294
 295    if (rb->_BaseFormat == GL_RGB ||
 296        rb->_BaseFormat == GL_RGBA) {
 297       format = GL_RGBA;
 298       type = GL_UNSIGNED_BYTE;
 299    }
 300    else if (rb->_BaseFormat == GL_DEPTH_STENCIL) {
 301       format = GL_DEPTH_STENCIL;
 302       type = GL_UNSIGNED_INT_24_8;
 303    }
 304    else {
 305       _mesa_debug(NULL,
 306                   "Unsupported BaseFormat 0x%x in "
 307                   "_mesa_write_renderbuffer_image()\n",
 308                   rb->_BaseFormat);
 309       return;
 310    }
 311
 312    buffer = (GLubyte *) malloc(rb->Width * rb->Height * 4);
 313
 314    ctx->Driver.ReadPixels(ctx, 0, 0, rb->Width, rb->Height,
 315                           format, type, &ctx->DefaultPacking, buffer);
 316
 317    /* make filename */
 318    _mesa_snprintf(s, sizeof(s), "/tmp/renderbuffer%u.ppm", rb->Name);
 319    _mesa_snprintf(s, sizeof(s), "C:\\renderbuffer%u.ppm", rb->Name);
 320
 321    printf("  Writing renderbuffer image to %s\n", s);
 322
 323    _mesa_debug(NULL, "  Writing renderbuffer image to %s\n", s);
 324
 325    write_ppm(s, buffer, rb->Width, rb->Height, 4, 0, 1, 2, GL_TRUE);
 326
 327    free(buffer);
 328 }
 329
 330
 331 /** How many texture images (mipmap levels, faces) to write to files */
 332 #define WRITE_NONE 0
 333 #define WRITE_ONE  1
 334 #define WRITE_ALL  2
 335
 336 static GLuint WriteImages;
 337
 338
 339 static void
 340 dump_texture(struct gl_texture_object *texObj, GLuint writeImages)
 341 {
 342    const GLuint numFaces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
 343    GLboolean written = GL_FALSE;
 344    GLuint i, j;
 345
 346    printf("Texture %u\n", texObj->Name);
 347    printf("  Target %s\n", tex_target_name(texObj->Target));
 348    for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 349       for (j = 0; j < numFaces; j++) {
 350          struct gl_texture_image *texImg = texObj->Image[j][i];
 351          if (texImg) {
 352             printf("  Face %u level %u: %d x %d x %d, format %s\n",
 353                    j, i,
 354                    texImg->Width, texImg->Height, texImg->Depth,
 355                    _mesa_get_format_name(texImg->TexFormat));
 356             if (writeImages == WRITE_ALL ||
 357                 (writeImages == WRITE_ONE && !written)) {
 358                write_texture_image(texObj, j, i);
 359                written = GL_TRUE;
 360             }
 361          }
 362       }
 363    }
 364 }
 365
 366
 367 /**
 368  * Dump a single texture.
 369  */
 370 void
 371 _mesa_dump_texture(GLuint texture, GLuint writeImages)
 372 {
 373    GET_CURRENT_CONTEXT(ctx);
 374    struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, texture);
 375    if (texObj) {
 376       dump_texture(texObj, writeImages);
 377    }
 378 }
 379
 380
 381 static void
 382 dump_texture_cb(GLuint id, void *data, void *userData)
 383 {
 384    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 385    (void) userData;
 386    dump_texture(texObj, WriteImages);
 387 }
 388
 389
 390 /**
 391  * Print basic info about all texture objext to stdout.
 392  * If dumpImages is true, write PPM of level[0] image to a file.
 393  */
 394 void
 395 _mesa_dump_textures(GLuint writeImages)
 396 {
 397    GET_CURRENT_CONTEXT(ctx);
 398    WriteImages = writeImages;
 399    _mesa_HashWalk(ctx->Shared->TexObjects, dump_texture_cb, ctx);
 400 }
 401
 402
 403 static void
 404 dump_renderbuffer(const struct gl_renderbuffer *rb, GLboolean writeImage)
 405 {
 406    printf("Renderbuffer %u: %u x %u  IntFormat = %s\n",
 407           rb->Name, rb->Width, rb->Height,
 408           _mesa_lookup_enum_by_nr(rb->InternalFormat));
 409    if (writeImage) {
 410       _mesa_write_renderbuffer_image(rb);
 411    }
 412 }
 413
 414
 415 static void
 416 dump_renderbuffer_cb(GLuint id, void *data, void *userData)
 417 {
 418    const struct gl_renderbuffer *rb = (const struct gl_renderbuffer *) data;
 419    (void) userData;
 420    dump_renderbuffer(rb, WriteImages);
 421 }
 422
 423
 424 /**
 425  * Print basic info about all renderbuffers to stdout.
 426  * If dumpImages is true, write PPM of level[0] image to a file.
 427  */
 428 void
 429 _mesa_dump_renderbuffers(GLboolean writeImages)
 430 {
 431    GET_CURRENT_CONTEXT(ctx);
 432    WriteImages = writeImages;
 433    _mesa_HashWalk(ctx->Shared->RenderBuffers, dump_renderbuffer_cb, ctx);
 434 }
 435
 436
 437
 438 void
 439 _mesa_dump_color_buffer(const char *filename)
 440 {
 441    GET_CURRENT_CONTEXT(ctx);
 442    const GLuint w = ctx->DrawBuffer->Width;
 443    const GLuint h = ctx->DrawBuffer->Height;
 444    GLubyte *buf;
 445
 446    buf = (GLubyte *) malloc(w * h * 4);
 447
 448    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 449    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 450    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 451
 452    _mesa_ReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
 453
 454    printf("ReadBuffer %p 0x%x  DrawBuffer %p 0x%x\n",
 455           (void *) ctx->ReadBuffer->_ColorReadBuffer,
 456           ctx->ReadBuffer->ColorReadBuffer,
 457           (void *) ctx->DrawBuffer->_ColorDrawBuffers[0],
 458           ctx->DrawBuffer->ColorDrawBuffer[0]);
 459    printf("Writing %d x %d color buffer to %s\n", w, h, filename);
 460    write_ppm(filename, buf, w, h, 4, 0, 1, 2, GL_TRUE);
 461
 462    _mesa_PopClientAttrib();
 463
 464    free(buf);
 465 }
 466
 467
 468 void
 469 _mesa_dump_depth_buffer(const char *filename)
 470 {
 471    GET_CURRENT_CONTEXT(ctx);
 472    const GLuint w = ctx->DrawBuffer->Width;
 473    const GLuint h = ctx->DrawBuffer->Height;
 474    GLuint *buf;
 475    GLubyte *buf2;
 476    GLuint i;
 477
 478    buf = (GLuint *) malloc(w * h * 4);  /* 4 bpp */
 479    buf2 = (GLubyte *) malloc(w * h * 3); /* 3 bpp */
 480
 481    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 482    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 483    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 484
 485    _mesa_ReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buf);
 486
 487    /* spread 24 bits of Z across R, G, B */
 488    for (i = 0; i < w * h; i++) {
 489       buf2[i*3+0] = (buf[i] >> 24) & 0xff;
 490       buf2[i*3+1] = (buf[i] >> 16) & 0xff;
 491       buf2[i*3+2] = (buf[i] >>  8) & 0xff;
 492    }
 493
 494    printf("Writing %d x %d depth buffer to %s\n", w, h, filename);
 495    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 496
 497    _mesa_PopClientAttrib();
 498
 499    free(buf);
 500    free(buf2);
 501 }
 502
 503
 504 void
 505 _mesa_dump_stencil_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    GLubyte *buf;
 511    GLubyte *buf2;
 512    GLuint i;
 513
 514    buf = (GLubyte *) malloc(w * h);  /* 1 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_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
 522
 523    for (i = 0; i < w * h; i++) {
 524       buf2[i*3+0] = buf[i];
 525       buf2[i*3+1] = (buf[i] & 127) * 2;
 526       buf2[i*3+2] = (buf[i] - 128) * 2;
 527    }
 528
 529    printf("Writing %d x %d stencil buffer to %s\n", w, h, filename);
 530    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 531
 532    _mesa_PopClientAttrib();
 533
 534    free(buf);
 535    free(buf2);
 536 }
 537
 538
 539 void
 540 _mesa_dump_image(const char *filename, const void *image, GLuint w, GLuint h,
 541                  GLenum format, GLenum type)
 542 {
 543    GLboolean invert = GL_TRUE;
 544
 545    if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
 546       write_ppm(filename, image, w, h, 4, 0, 1, 2, invert);
 547    }
 548    else if (format == GL_BGRA && type == GL_UNSIGNED_BYTE) {
 549       write_ppm(filename, image, w, h, 4, 2, 1, 0, invert);
 550    }
 551    else if (format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE) {
 552       write_ppm(filename, image, w, h, 2, 1, 0, 0, invert);
 553    }
 554    else if (format == GL_RED && type == GL_UNSIGNED_BYTE) {
 555       write_ppm(filename, image, w, h, 1, 0, 0, 0, invert);
 556    }
 557    else if (format == GL_RGBA && type == GL_FLOAT) {
 558       /* convert floats to ubyte */
 559       GLubyte *buf = (GLubyte *) malloc(w * h * 4 * sizeof(GLubyte));
 560       const GLfloat *f = (const GLfloat *) image;
 561       GLuint i;
 562       for (i = 0; i < w * h * 4; i++) {
 563          UNCLAMPED_FLOAT_TO_UBYTE(buf[i], f[i]);
 564       }
 565       write_ppm(filename, buf, w, h, 4, 0, 1, 2, invert);
 566       free(buf);
 567    }
 568    else if (format == GL_RED && type == GL_FLOAT) {
 569       /* convert floats to ubyte */
 570       GLubyte *buf = (GLubyte *) malloc(w * h * sizeof(GLubyte));
 571       const GLfloat *f = (const GLfloat *) image;
 572       GLuint i;
 573       for (i = 0; i < w * h; i++) {
 574          UNCLAMPED_FLOAT_TO_UBYTE(buf[i], f[i]);
 575       }
 576       write_ppm(filename, buf, w, h, 1, 0, 0, 0, invert);
 577       free(buf);
 578    }
 579    else {
 580       _mesa_problem(NULL,
 581                  "Unsupported format 0x%x / type 0x%x in _mesa_dump_image()",
 582                  format, type);
 583    }
 584 }
 585
 586
 587 /**
 588  * Quick and dirty function to "print" a texture to stdout.
 589  */
 590 void
 591 _mesa_print_texture(struct gl_context *ctx, struct gl_texture_image *img)
 592 {
 593    const GLint slice = 0;
 594    GLint srcRowStride;
 595    GLuint i, j, c;
 596    GLubyte *data;
 597
 598    ctx->Driver.MapTextureImage(ctx, img, slice,
 599                                0, 0, img->Width, img->Height, GL_MAP_READ_BIT,
 600                                &data, &srcRowStride);
 601
 602    if (!data) {
 603       printf("No texture data\n");
 604    }
 605    else {
 606       /* XXX add more formats or make into a new format utility function */
 607       switch (img->TexFormat) {
 608          case MESA_FORMAT_A8:
 609          case MESA_FORMAT_L8:
 610          case MESA_FORMAT_I8:
 611             c = 1;
 612             break;
 613          case MESA_FORMAT_AL88:
 614          case MESA_FORMAT_AL88_REV:
 615             c = 2;
 616             break;
 617          case MESA_FORMAT_RGB888:
 618          case MESA_FORMAT_BGR888:
 619             c = 3;
 620             break;
 621          case MESA_FORMAT_RGBA8888:
 622          case MESA_FORMAT_ARGB8888:
 623             c = 4;
 624             break;
 625          default:
 626             _mesa_problem(NULL, "error in PrintTexture\n");
 627             return;
 628       }
 629
 630       for (i = 0; i < img->Height; i++) {
 631          for (j = 0; j < img->Width; j++) {
 632             if (c==1)
 633                printf("%02x  ", data[0]);
 634             else if (c==2)
 635                printf("%02x%02x  ", data[0], data[1]);
 636             else if (c==3)
 637                printf("%02x%02x%02x  ", data[0], data[1], data[2]);
 638             else if (c==4)
 639                printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
 640             data += (srcRowStride - img->Width) * c;
 641          }
 642          /* XXX use img->ImageStride here */
 643          printf("\n");
 644
 645       }
 646    }
 647
 648    ctx->Driver.UnmapTextureImage(ctx, img, slice);
 649 }