src/mesa/main/debug.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * 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_CUBE_MAP_ARRAY, "GL_TEXTURE_CUBE_MAP_ARRAY" },
  55       { GL_TEXTURE_BUFFER, "GL_TEXTURE_BUFFER" },
  56       { GL_TEXTURE_2D_MULTISAMPLE, "GL_TEXTURE_2D_MULTISAMPLE" },
  57       { GL_TEXTURE_2D_MULTISAMPLE_ARRAY, "GL_TEXTURE_2D_MULTISAMPLE_ARRAY" },
  58       { GL_TEXTURE_EXTERNAL_OES, "GL_TEXTURE_EXTERNAL_OES" }
  59    };
  60    GLuint i;
  61    STATIC_ASSERT(Elements(tex_targets) == NUM_TEXTURE_TARGETS);
  62    for (i = 0; i < Elements(tex_targets); i++) {
  63       if (tex_targets[i].target == tgt)
  64          return tex_targets[i].name;
  65    }
  66    return "UNKNOWN TEX TARGET";
  67 }
  68
  69
  70 void
  71 _mesa_print_state( const char *msg, GLuint state )
  72 {
  73    _mesa_debug(NULL,
  74            "%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\n",
  75            msg,
  76            state,
  77            (state & _NEW_MODELVIEW)       ? "ctx->ModelView, " : "",
  78            (state & _NEW_PROJECTION)      ? "ctx->Projection, " : "",
  79            (state & _NEW_TEXTURE_MATRIX)  ? "ctx->TextureMatrix, " : "",
  80            (state & _NEW_COLOR)           ? "ctx->Color, " : "",
  81            (state & _NEW_DEPTH)           ? "ctx->Depth, " : "",
  82            (state & _NEW_EVAL)            ? "ctx->Eval/EvalMap, " : "",
  83            (state & _NEW_FOG)             ? "ctx->Fog, " : "",
  84            (state & _NEW_HINT)            ? "ctx->Hint, " : "",
  85            (state & _NEW_LIGHT)           ? "ctx->Light, " : "",
  86            (state & _NEW_LINE)            ? "ctx->Line, " : "",
  87            (state & _NEW_PIXEL)           ? "ctx->Pixel, " : "",
  88            (state & _NEW_POINT)           ? "ctx->Point, " : "",
  89            (state & _NEW_POLYGON)         ? "ctx->Polygon, " : "",
  90            (state & _NEW_POLYGONSTIPPLE)  ? "ctx->PolygonStipple, " : "",
  91            (state & _NEW_SCISSOR)         ? "ctx->Scissor, " : "",
  92            (state & _NEW_STENCIL)         ? "ctx->Stencil, " : "",
  93            (state & _NEW_TEXTURE)         ? "ctx->Texture, " : "",
  94            (state & _NEW_TRANSFORM)       ? "ctx->Transform, " : "",
  95            (state & _NEW_VIEWPORT)        ? "ctx->Viewport, " : "",
  96            (state & _NEW_ARRAY)           ? "ctx->Array, " : "",
  97            (state & _NEW_RENDERMODE)      ? "ctx->RenderMode, " : "",
  98            (state & _NEW_BUFFERS)         ? "ctx->Visual, ctx->DrawBuffer,, " : "");
  99 }
 100
 101
 102
 103 /**
 104  * Print information about this Mesa version and build options.
 105  */
 106 void _mesa_print_info( void )
 107 {
 108    _mesa_debug(NULL, "Mesa GL_VERSION = %s\n",
 109            (char *) _mesa_GetString(GL_VERSION));
 110    _mesa_debug(NULL, "Mesa GL_RENDERER = %s\n",
 111            (char *) _mesa_GetString(GL_RENDERER));
 112    _mesa_debug(NULL, "Mesa GL_VENDOR = %s\n",
 113            (char *) _mesa_GetString(GL_VENDOR));
 114    _mesa_debug(NULL, "Mesa GL_EXTENSIONS = %s\n",
 115            (char *) _mesa_GetString(GL_EXTENSIONS));
 116 #if defined(THREADS)
 117    _mesa_debug(NULL, "Mesa thread-safe: YES\n");
 118 #else
 119    _mesa_debug(NULL, "Mesa thread-safe: NO\n");
 120 #endif
 121 #if defined(USE_X86_ASM)
 122    _mesa_debug(NULL, "Mesa x86-optimized: YES\n");
 123 #else
 124    _mesa_debug(NULL, "Mesa x86-optimized: NO\n");
 125 #endif
 126 #if defined(USE_SPARC_ASM)
 127    _mesa_debug(NULL, "Mesa sparc-optimized: YES\n");
 128 #else
 129    _mesa_debug(NULL, "Mesa sparc-optimized: NO\n");
 130 #endif
 131 }
 132
 133
 134 /**
 135  * Set verbose logging flags.  When these flags are set, GL API calls
 136  * in the various categories will be printed to stderr.
 137  * \param str  a comma-separated list of keywords
 138  */
 139 static void
 140 set_verbose_flags(const char *str)
 141 {
 142 #ifdef DEBUG
 143    struct option {
 144       const char *name;
 145       GLbitfield flag;
 146    };
 147    static const struct option opts[] = {
 148       { "varray",    VERBOSE_VARRAY },
 149       { "tex",       VERBOSE_TEXTURE },
 150       { "mat",       VERBOSE_MATERIAL },
 151       { "pipe",      VERBOSE_PIPELINE },
 152       { "driver",    VERBOSE_DRIVER },
 153       { "state",     VERBOSE_STATE },
 154       { "api",       VERBOSE_API },
 155       { "list",      VERBOSE_DISPLAY_LIST },
 156       { "lighting",  VERBOSE_LIGHTING },
 157       { "disassem",  VERBOSE_DISASSEM },
 158       { "draw",      VERBOSE_DRAW },
 159       { "swap",      VERBOSE_SWAPBUFFERS }
 160    };
 161    GLuint i;
 162
 163    if (!str)
 164       return;
 165
 166    MESA_VERBOSE = 0x0;
 167    for (i = 0; i < Elements(opts); i++) {
 168       if (strstr(str, opts[i].name) || strcmp(str, "all") == 0)
 169          MESA_VERBOSE |= opts[i].flag;
 170    }
 171 #endif
 172 }
 173
 174
 175 /**
 176  * Set debugging flags.  When these flags are set, Mesa will do additional
 177  * debug checks or actions.
 178  * \param str  a comma-separated list of keywords
 179  */
 180 static void
 181 set_debug_flags(const char *str)
 182 {
 183 #ifdef DEBUG
 184    struct option {
 185       const char *name;
 186       GLbitfield flag;
 187    };
 188    static const struct option opts[] = {
 189       { "silent", DEBUG_SILENT }, /* turn off debug messages */
 190       { "flush", DEBUG_ALWAYS_FLUSH }, /* flush after each drawing command */
 191       { "incomplete_tex", DEBUG_INCOMPLETE_TEXTURE },
 192       { "incomplete_fbo", DEBUG_INCOMPLETE_FBO }
 193    };
 194    GLuint i;
 195
 196    if (!str)
 197       return;
 198
 199    MESA_DEBUG_FLAGS = 0x0;
 200    for (i = 0; i < Elements(opts); i++) {
 201       if (strstr(str, opts[i].name))
 202          MESA_DEBUG_FLAGS |= opts[i].flag;
 203    }
 204 #endif
 205 }
 206
 207
 208 /**
 209  * Initialize debugging variables from env vars.
 210  */
 211 void
 212 _mesa_init_debug( struct gl_context *ctx )
 213 {
 214    set_debug_flags(_mesa_getenv("MESA_DEBUG"));
 215    set_verbose_flags(_mesa_getenv("MESA_VERBOSE"));
 216 }
 217
 218
 219 /*
 220  * Write ppm file
 221  */
 222 static void
 223 write_ppm(const char *filename, const GLubyte *buffer, int width, int height,
 224           int comps, int rcomp, int gcomp, int bcomp, GLboolean invert)
 225 {
 226    FILE *f = fopen( filename, "w" );
 227    if (f) {
 228       int x, y;
 229       const GLubyte *ptr = buffer;
 230       fprintf(f,"P6\n");
 231       fprintf(f,"# ppm-file created by osdemo.c\n");
 232       fprintf(f,"%i %i\n", width,height);
 233       fprintf(f,"255\n");
 234       fclose(f);
 235       f = fopen( filename, "ab" );  /* reopen in binary append mode */
 236       for (y=0; y < height; y++) {
 237          for (x = 0; x < width; x++) {
 238             int yy = invert ? (height - 1 - y) : y;
 239             int i = (yy * width + x) * comps;
 240             fputc(ptr[i+rcomp], f); /* write red */
 241             fputc(ptr[i+gcomp], f); /* write green */
 242             fputc(ptr[i+bcomp], f); /* write blue */
 243          }
 244       }
 245       fclose(f);
 246    }
 247    else {
 248       fprintf(stderr, "Unable to create %s in write_ppm()\n", filename);
 249    }
 250 }
 251
 252
 253 /**
 254  * Write a texture image to a ppm file.
 255  * \param face  cube face in [0,5]
 256  * \param level  mipmap level
 257  */
 258 static void
 259 write_texture_image(struct gl_texture_object *texObj,
 260                     GLuint face, GLuint level)
 261 {
 262    struct gl_texture_image *img = texObj->Image[face][level];
 263    if (img) {
 264       GET_CURRENT_CONTEXT(ctx);
 265       struct gl_pixelstore_attrib store;
 266       GLubyte *buffer;
 267       char s[100];
 268
 269       buffer = malloc(img->Width * img->Height
 270                                         * img->Depth * 4);
 271
 272       store = ctx->Pack; /* save */
 273       ctx->Pack = ctx->DefaultPacking;
 274
 275       ctx->Driver.GetTexImage(ctx, GL_RGBA, GL_UNSIGNED_BYTE, buffer, img);
 276
 277       /* make filename */
 278       _mesa_snprintf(s, sizeof(s), "/tmp/tex%u.l%u.f%u.ppm", texObj->Name, level, face);
 279
 280       printf("  Writing image level %u to %s\n", level, s);
 281       write_ppm(s, buffer, img->Width, img->Height, 4, 0, 1, 2, GL_FALSE);
 282
 283       ctx->Pack = store; /* restore */
 284
 285       free(buffer);
 286    }
 287 }
 288
 289
 290 /**
 291  * Write renderbuffer image to a ppm file.
 292  */
 293 void
 294 _mesa_write_renderbuffer_image(const struct gl_renderbuffer *rb)
 295 {
 296    GET_CURRENT_CONTEXT(ctx);
 297    GLubyte *buffer;
 298    char s[100];
 299    GLenum format, type;
 300
 301    if (rb->_BaseFormat == GL_RGB ||
 302        rb->_BaseFormat == GL_RGBA) {
 303       format = GL_RGBA;
 304       type = GL_UNSIGNED_BYTE;
 305    }
 306    else if (rb->_BaseFormat == GL_DEPTH_STENCIL) {
 307       format = GL_DEPTH_STENCIL;
 308       type = GL_UNSIGNED_INT_24_8;
 309    }
 310    else {
 311       _mesa_debug(NULL,
 312                   "Unsupported BaseFormat 0x%x in "
 313                   "_mesa_write_renderbuffer_image()\n",
 314                   rb->_BaseFormat);
 315       return;
 316    }
 317
 318    buffer = malloc(rb->Width * rb->Height * 4);
 319
 320    ctx->Driver.ReadPixels(ctx, 0, 0, rb->Width, rb->Height,
 321                           format, type, &ctx->DefaultPacking, buffer);
 322
 323    /* make filename */
 324    _mesa_snprintf(s, sizeof(s), "/tmp/renderbuffer%u.ppm", rb->Name);
 325    _mesa_snprintf(s, sizeof(s), "C:\\renderbuffer%u.ppm", rb->Name);
 326
 327    printf("  Writing renderbuffer image to %s\n", s);
 328
 329    _mesa_debug(NULL, "  Writing renderbuffer image to %s\n", s);
 330
 331    write_ppm(s, buffer, rb->Width, rb->Height, 4, 0, 1, 2, GL_TRUE);
 332
 333    free(buffer);
 334 }
 335
 336
 337 /** How many texture images (mipmap levels, faces) to write to files */
 338 #define WRITE_NONE 0
 339 #define WRITE_ONE  1
 340 #define WRITE_ALL  2
 341
 342 static GLuint WriteImages;
 343
 344
 345 static void
 346 dump_texture(struct gl_texture_object *texObj, GLuint writeImages)
 347 {
 348    const GLuint numFaces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
 349    GLboolean written = GL_FALSE;
 350    GLuint i, j;
 351
 352    printf("Texture %u\n", texObj->Name);
 353    printf("  Target %s\n", tex_target_name(texObj->Target));
 354    for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 355       for (j = 0; j < numFaces; j++) {
 356          struct gl_texture_image *texImg = texObj->Image[j][i];
 357          if (texImg) {
 358             printf("  Face %u level %u: %d x %d x %d, format %s\n",
 359                    j, i,
 360                    texImg->Width, texImg->Height, texImg->Depth,
 361                    _mesa_get_format_name(texImg->TexFormat));
 362             if (writeImages == WRITE_ALL ||
 363                 (writeImages == WRITE_ONE && !written)) {
 364                write_texture_image(texObj, j, i);
 365                written = GL_TRUE;
 366             }
 367          }
 368       }
 369    }
 370 }
 371
 372
 373 /**
 374  * Dump a single texture.
 375  */
 376 void
 377 _mesa_dump_texture(GLuint texture, GLuint writeImages)
 378 {
 379    GET_CURRENT_CONTEXT(ctx);
 380    struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, texture);
 381    if (texObj) {
 382       dump_texture(texObj, writeImages);
 383    }
 384 }
 385
 386
 387 static void
 388 dump_texture_cb(GLuint id, void *data, void *userData)
 389 {
 390    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 391    (void) userData;
 392    dump_texture(texObj, WriteImages);
 393 }
 394
 395
 396 /**
 397  * Print basic info about all texture objext to stdout.
 398  * If dumpImages is true, write PPM of level[0] image to a file.
 399  */
 400 void
 401 _mesa_dump_textures(GLuint writeImages)
 402 {
 403    GET_CURRENT_CONTEXT(ctx);
 404    WriteImages = writeImages;
 405    _mesa_HashWalk(ctx->Shared->TexObjects, dump_texture_cb, ctx);
 406 }
 407
 408
 409 static void
 410 dump_renderbuffer(const struct gl_renderbuffer *rb, GLboolean writeImage)
 411 {
 412    printf("Renderbuffer %u: %u x %u  IntFormat = %s\n",
 413           rb->Name, rb->Width, rb->Height,
 414           _mesa_lookup_enum_by_nr(rb->InternalFormat));
 415    if (writeImage) {
 416       _mesa_write_renderbuffer_image(rb);
 417    }
 418 }
 419
 420
 421 static void
 422 dump_renderbuffer_cb(GLuint id, void *data, void *userData)
 423 {
 424    const struct gl_renderbuffer *rb = (const struct gl_renderbuffer *) data;
 425    (void) userData;
 426    dump_renderbuffer(rb, WriteImages);
 427 }
 428
 429
 430 /**
 431  * Print basic info about all renderbuffers to stdout.
 432  * If dumpImages is true, write PPM of level[0] image to a file.
 433  */
 434 void
 435 _mesa_dump_renderbuffers(GLboolean writeImages)
 436 {
 437    GET_CURRENT_CONTEXT(ctx);
 438    WriteImages = writeImages;
 439    _mesa_HashWalk(ctx->Shared->RenderBuffers, dump_renderbuffer_cb, ctx);
 440 }
 441
 442
 443
 444 void
 445 _mesa_dump_color_buffer(const char *filename)
 446 {
 447    GET_CURRENT_CONTEXT(ctx);
 448    const GLuint w = ctx->DrawBuffer->Width;
 449    const GLuint h = ctx->DrawBuffer->Height;
 450    GLubyte *buf;
 451
 452    buf = malloc(w * h * 4);
 453
 454    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 455    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 456    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 457
 458    _mesa_ReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
 459
 460    printf("ReadBuffer %p 0x%x  DrawBuffer %p 0x%x\n",
 461           (void *) ctx->ReadBuffer->_ColorReadBuffer,
 462           ctx->ReadBuffer->ColorReadBuffer,
 463           (void *) ctx->DrawBuffer->_ColorDrawBuffers[0],
 464           ctx->DrawBuffer->ColorDrawBuffer[0]);
 465    printf("Writing %d x %d color buffer to %s\n", w, h, filename);
 466    write_ppm(filename, buf, w, h, 4, 0, 1, 2, GL_TRUE);
 467
 468    _mesa_PopClientAttrib();
 469
 470    free(buf);
 471 }
 472
 473
 474 void
 475 _mesa_dump_depth_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    GLuint *buf;
 481    GLubyte *buf2;
 482    GLuint i;
 483
 484    buf = malloc(w * h * 4);  /* 4 bpp */
 485    buf2 = malloc(w * h * 3); /* 3 bpp */
 486
 487    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 488    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 489    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 490
 491    _mesa_ReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buf);
 492
 493    /* spread 24 bits of Z across R, G, B */
 494    for (i = 0; i < w * h; i++) {
 495       buf2[i*3+0] = (buf[i] >> 24) & 0xff;
 496       buf2[i*3+1] = (buf[i] >> 16) & 0xff;
 497       buf2[i*3+2] = (buf[i] >>  8) & 0xff;
 498    }
 499
 500    printf("Writing %d x %d depth buffer to %s\n", w, h, filename);
 501    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 502
 503    _mesa_PopClientAttrib();
 504
 505    free(buf);
 506    free(buf2);
 507 }
 508
 509
 510 void
 511 _mesa_dump_stencil_buffer(const char *filename)
 512 {
 513    GET_CURRENT_CONTEXT(ctx);
 514    const GLuint w = ctx->DrawBuffer->Width;
 515    const GLuint h = ctx->DrawBuffer->Height;
 516    GLubyte *buf;
 517    GLubyte *buf2;
 518    GLuint i;
 519
 520    buf = malloc(w * h);  /* 1 bpp */
 521    buf2 = malloc(w * h * 3); /* 3 bpp */
 522
 523    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 524    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 525    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 526
 527    _mesa_ReadPixels(0, 0, w, h, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
 528
 529    for (i = 0; i < w * h; i++) {
 530       buf2[i*3+0] = buf[i];
 531       buf2[i*3+1] = (buf[i] & 127) * 2;
 532       buf2[i*3+2] = (buf[i] - 128) * 2;
 533    }
 534
 535    printf("Writing %d x %d stencil buffer to %s\n", w, h, filename);
 536    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 537
 538    _mesa_PopClientAttrib();
 539
 540    free(buf);
 541    free(buf2);
 542 }
 543
 544
 545 void
 546 _mesa_dump_image(const char *filename, const void *image, GLuint w, GLuint h,
 547                  GLenum format, GLenum type)
 548 {
 549    GLboolean invert = GL_TRUE;
 550
 551    if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
 552       write_ppm(filename, image, w, h, 4, 0, 1, 2, invert);
 553    }
 554    else if (format == GL_BGRA && type == GL_UNSIGNED_BYTE) {
 555       write_ppm(filename, image, w, h, 4, 2, 1, 0, invert);
 556    }
 557    else if (format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE) {
 558       write_ppm(filename, image, w, h, 2, 1, 0, 0, invert);
 559    }
 560    else if (format == GL_RED && type == GL_UNSIGNED_BYTE) {
 561       write_ppm(filename, image, w, h, 1, 0, 0, 0, invert);
 562    }
 563    else if (format == GL_RGBA && type == GL_FLOAT) {
 564       /* convert floats to ubyte */
 565       GLubyte *buf = malloc(w * h * 4 * sizeof(GLubyte));
 566       const GLfloat *f = (const GLfloat *) image;
 567       GLuint i;
 568       for (i = 0; i < w * h * 4; i++) {
 569          UNCLAMPED_FLOAT_TO_UBYTE(buf[i], f[i]);
 570       }
 571       write_ppm(filename, buf, w, h, 4, 0, 1, 2, invert);
 572       free(buf);
 573    }
 574    else if (format == GL_RED && type == GL_FLOAT) {
 575       /* convert floats to ubyte */
 576       GLubyte *buf = malloc(w * h * sizeof(GLubyte));
 577       const GLfloat *f = (const GLfloat *) image;
 578       GLuint i;
 579       for (i = 0; i < w * h; i++) {
 580          UNCLAMPED_FLOAT_TO_UBYTE(buf[i], f[i]);
 581       }
 582       write_ppm(filename, buf, w, h, 1, 0, 0, 0, invert);
 583       free(buf);
 584    }
 585    else {
 586       _mesa_problem(NULL,
 587                  "Unsupported format 0x%x / type 0x%x in _mesa_dump_image()",
 588                  format, type);
 589    }
 590 }
 591
 592
 593 /**
 594  * Quick and dirty function to "print" a texture to stdout.
 595  */
 596 void
 597 _mesa_print_texture(struct gl_context *ctx, struct gl_texture_image *img)
 598 {
 599    const GLint slice = 0;
 600    GLint srcRowStride;
 601    GLuint i, j, c;
 602    GLubyte *data;
 603
 604    ctx->Driver.MapTextureImage(ctx, img, slice,
 605                                0, 0, img->Width, img->Height, GL_MAP_READ_BIT,
 606                                &data, &srcRowStride);
 607
 608    if (!data) {
 609       printf("No texture data\n");
 610    }
 611    else {
 612       /* XXX add more formats or make into a new format utility function */
 613       switch (img->TexFormat) {
 614          case MESA_FORMAT_A8:
 615          case MESA_FORMAT_L8:
 616          case MESA_FORMAT_I8:
 617             c = 1;
 618             break;
 619          case MESA_FORMAT_AL88:
 620          case MESA_FORMAT_AL88_REV:
 621             c = 2;
 622             break;
 623          case MESA_FORMAT_RGB888:
 624          case MESA_FORMAT_BGR888:
 625             c = 3;
 626             break;
 627          case MESA_FORMAT_RGBA8888:
 628          case MESA_FORMAT_ARGB8888:
 629             c = 4;
 630             break;
 631          default:
 632             _mesa_problem(NULL, "error in PrintTexture\n");
 633             return;
 634       }
 635
 636       for (i = 0; i < img->Height; i++) {
 637          for (j = 0; j < img->Width; j++) {
 638             if (c==1)
 639                printf("%02x  ", data[0]);
 640             else if (c==2)
 641                printf("%02x%02x  ", data[0], data[1]);
 642             else if (c==3)
 643                printf("%02x%02x%02x  ", data[0], data[1], data[2]);
 644             else if (c==4)
 645                printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
 646             data += (srcRowStride - img->Width) * c;
 647          }
 648          /* XXX use img->ImageStride here */
 649          printf("\n");
 650
 651       }
 652    }
 653
 654    ctx->Driver.UnmapTextureImage(ctx, img, slice);
 655 }