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( struct gl_context *ctx )
 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
 115    /* use ctx as GL_EXTENSIONS will not work on 3.0 or higher
 116     * core contexts.
 117     */
 118    _mesa_debug(NULL, "Mesa GL_EXTENSIONS = %s\n", ctx->Extensions.String);
 119
 120 #if defined(THREADS)
 121    _mesa_debug(NULL, "Mesa thread-safe: YES\n");
 122 #else
 123    _mesa_debug(NULL, "Mesa thread-safe: NO\n");
 124 #endif
 125 #if defined(USE_X86_ASM)
 126    _mesa_debug(NULL, "Mesa x86-optimized: YES\n");
 127 #else
 128    _mesa_debug(NULL, "Mesa x86-optimized: NO\n");
 129 #endif
 130 #if defined(USE_SPARC_ASM)
 131    _mesa_debug(NULL, "Mesa sparc-optimized: YES\n");
 132 #else
 133    _mesa_debug(NULL, "Mesa sparc-optimized: NO\n");
 134 #endif
 135 }
 136
 137
 138 /**
 139  * Set verbose logging flags.  When these flags are set, GL API calls
 140  * in the various categories will be printed to stderr.
 141  * \param str  a comma-separated list of keywords
 142  */
 143 static void
 144 set_verbose_flags(const char *str)
 145 {
 146 #ifdef DEBUG
 147    struct option {
 148       const char *name;
 149       GLbitfield flag;
 150    };
 151    static const struct option opts[] = {
 152       { "varray",    VERBOSE_VARRAY },
 153       { "tex",       VERBOSE_TEXTURE },
 154       { "mat",       VERBOSE_MATERIAL },
 155       { "pipe",      VERBOSE_PIPELINE },
 156       { "driver",    VERBOSE_DRIVER },
 157       { "state",     VERBOSE_STATE },
 158       { "api",       VERBOSE_API },
 159       { "list",      VERBOSE_DISPLAY_LIST },
 160       { "lighting",  VERBOSE_LIGHTING },
 161       { "disassem",  VERBOSE_DISASSEM },
 162       { "draw",      VERBOSE_DRAW },
 163       { "swap",      VERBOSE_SWAPBUFFERS }
 164    };
 165    GLuint i;
 166
 167    if (!str)
 168       return;
 169
 170    MESA_VERBOSE = 0x0;
 171    for (i = 0; i < Elements(opts); i++) {
 172       if (strstr(str, opts[i].name) || strcmp(str, "all") == 0)
 173          MESA_VERBOSE |= opts[i].flag;
 174    }
 175 #endif
 176 }
 177
 178
 179 /**
 180  * Set debugging flags.  When these flags are set, Mesa will do additional
 181  * debug checks or actions.
 182  * \param str  a comma-separated list of keywords
 183  */
 184 static void
 185 set_debug_flags(const char *str)
 186 {
 187 #ifdef DEBUG
 188    struct option {
 189       const char *name;
 190       GLbitfield flag;
 191    };
 192    static const struct option opts[] = {
 193       { "silent", DEBUG_SILENT }, /* turn off debug messages */
 194       { "flush", DEBUG_ALWAYS_FLUSH }, /* flush after each drawing command */
 195       { "incomplete_tex", DEBUG_INCOMPLETE_TEXTURE },
 196       { "incomplete_fbo", DEBUG_INCOMPLETE_FBO }
 197    };
 198    GLuint i;
 199
 200    if (!str)
 201       return;
 202
 203    MESA_DEBUG_FLAGS = 0x0;
 204    for (i = 0; i < Elements(opts); i++) {
 205       if (strstr(str, opts[i].name))
 206          MESA_DEBUG_FLAGS |= opts[i].flag;
 207    }
 208 #endif
 209 }
 210
 211
 212 /**
 213  * Initialize debugging variables from env vars.
 214  */
 215 void
 216 _mesa_init_debug( struct gl_context *ctx )
 217 {
 218    set_debug_flags(_mesa_getenv("MESA_DEBUG"));
 219    set_verbose_flags(_mesa_getenv("MESA_VERBOSE"));
 220 }
 221
 222
 223 /*
 224  * Write ppm file
 225  */
 226 static void
 227 write_ppm(const char *filename, const GLubyte *buffer, int width, int height,
 228           int comps, int rcomp, int gcomp, int bcomp, GLboolean invert)
 229 {
 230    FILE *f = fopen( filename, "w" );
 231    if (f) {
 232       int x, y;
 233       const GLubyte *ptr = buffer;
 234       fprintf(f,"P6\n");
 235       fprintf(f,"# ppm-file created by osdemo.c\n");
 236       fprintf(f,"%i %i\n", width,height);
 237       fprintf(f,"255\n");
 238       fclose(f);
 239       f = fopen( filename, "ab" );  /* reopen in binary append mode */
 240       for (y=0; y < height; y++) {
 241          for (x = 0; x < width; x++) {
 242             int yy = invert ? (height - 1 - y) : y;
 243             int i = (yy * width + x) * comps;
 244             fputc(ptr[i+rcomp], f); /* write red */
 245             fputc(ptr[i+gcomp], f); /* write green */
 246             fputc(ptr[i+bcomp], f); /* write blue */
 247          }
 248       }
 249       fclose(f);
 250    }
 251    else {
 252       fprintf(stderr, "Unable to create %s in write_ppm()\n", filename);
 253    }
 254 }
 255
 256
 257 /**
 258  * Write a texture image to a ppm file.
 259  * \param face  cube face in [0,5]
 260  * \param level  mipmap level
 261  */
 262 static void
 263 write_texture_image(struct gl_texture_object *texObj,
 264                     GLuint face, GLuint level)
 265 {
 266    struct gl_texture_image *img = texObj->Image[face][level];
 267    if (img) {
 268       GET_CURRENT_CONTEXT(ctx);
 269       struct gl_pixelstore_attrib store;
 270       GLubyte *buffer;
 271       char s[100];
 272
 273       buffer = malloc(img->Width * img->Height
 274                                         * img->Depth * 4);
 275
 276       store = ctx->Pack; /* save */
 277       ctx->Pack = ctx->DefaultPacking;
 278
 279       ctx->Driver.GetTexImage(ctx, GL_RGBA, GL_UNSIGNED_BYTE, buffer, img);
 280
 281       /* make filename */
 282       _mesa_snprintf(s, sizeof(s), "/tmp/tex%u.l%u.f%u.ppm", texObj->Name, level, face);
 283
 284       printf("  Writing image level %u to %s\n", level, s);
 285       write_ppm(s, buffer, img->Width, img->Height, 4, 0, 1, 2, GL_FALSE);
 286
 287       ctx->Pack = store; /* restore */
 288
 289       free(buffer);
 290    }
 291 }
 292
 293
 294 /**
 295  * Write renderbuffer image to a ppm file.
 296  */
 297 void
 298 _mesa_write_renderbuffer_image(const struct gl_renderbuffer *rb)
 299 {
 300    GET_CURRENT_CONTEXT(ctx);
 301    GLubyte *buffer;
 302    char s[100];
 303    GLenum format, type;
 304
 305    if (rb->_BaseFormat == GL_RGB ||
 306        rb->_BaseFormat == GL_RGBA) {
 307       format = GL_RGBA;
 308       type = GL_UNSIGNED_BYTE;
 309    }
 310    else if (rb->_BaseFormat == GL_DEPTH_STENCIL) {
 311       format = GL_DEPTH_STENCIL;
 312       type = GL_UNSIGNED_INT_24_8;
 313    }
 314    else {
 315       _mesa_debug(NULL,
 316                   "Unsupported BaseFormat 0x%x in "
 317                   "_mesa_write_renderbuffer_image()\n",
 318                   rb->_BaseFormat);
 319       return;
 320    }
 321
 322    buffer = malloc(rb->Width * rb->Height * 4);
 323
 324    ctx->Driver.ReadPixels(ctx, 0, 0, rb->Width, rb->Height,
 325                           format, type, &ctx->DefaultPacking, buffer);
 326
 327    /* make filename */
 328    _mesa_snprintf(s, sizeof(s), "/tmp/renderbuffer%u.ppm", rb->Name);
 329    _mesa_snprintf(s, sizeof(s), "C:\\renderbuffer%u.ppm", rb->Name);
 330
 331    printf("  Writing renderbuffer image to %s\n", s);
 332
 333    _mesa_debug(NULL, "  Writing renderbuffer image to %s\n", s);
 334
 335    write_ppm(s, buffer, rb->Width, rb->Height, 4, 0, 1, 2, GL_TRUE);
 336
 337    free(buffer);
 338 }
 339
 340
 341 /** How many texture images (mipmap levels, faces) to write to files */
 342 #define WRITE_NONE 0
 343 #define WRITE_ONE  1
 344 #define WRITE_ALL  2
 345
 346 static GLuint WriteImages;
 347
 348
 349 static void
 350 dump_texture(struct gl_texture_object *texObj, GLuint writeImages)
 351 {
 352    const GLuint numFaces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
 353    GLboolean written = GL_FALSE;
 354    GLuint i, j;
 355
 356    printf("Texture %u\n", texObj->Name);
 357    printf("  Target %s\n", tex_target_name(texObj->Target));
 358    for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 359       for (j = 0; j < numFaces; j++) {
 360          struct gl_texture_image *texImg = texObj->Image[j][i];
 361          if (texImg) {
 362             printf("  Face %u level %u: %d x %d x %d, format %s\n",
 363                    j, i,
 364                    texImg->Width, texImg->Height, texImg->Depth,
 365                    _mesa_get_format_name(texImg->TexFormat));
 366             if (writeImages == WRITE_ALL ||
 367                 (writeImages == WRITE_ONE && !written)) {
 368                write_texture_image(texObj, j, i);
 369                written = GL_TRUE;
 370             }
 371          }
 372       }
 373    }
 374 }
 375
 376
 377 /**
 378  * Dump a single texture.
 379  */
 380 void
 381 _mesa_dump_texture(GLuint texture, GLuint writeImages)
 382 {
 383    GET_CURRENT_CONTEXT(ctx);
 384    struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, texture);
 385    if (texObj) {
 386       dump_texture(texObj, writeImages);
 387    }
 388 }
 389
 390
 391 static void
 392 dump_texture_cb(GLuint id, void *data, void *userData)
 393 {
 394    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 395    (void) userData;
 396    dump_texture(texObj, WriteImages);
 397 }
 398
 399
 400 /**
 401  * Print basic info about all texture objext to stdout.
 402  * If dumpImages is true, write PPM of level[0] image to a file.
 403  */
 404 void
 405 _mesa_dump_textures(GLuint writeImages)
 406 {
 407    GET_CURRENT_CONTEXT(ctx);
 408    WriteImages = writeImages;
 409    _mesa_HashWalk(ctx->Shared->TexObjects, dump_texture_cb, ctx);
 410 }
 411
 412
 413 static void
 414 dump_renderbuffer(const struct gl_renderbuffer *rb, GLboolean writeImage)
 415 {
 416    printf("Renderbuffer %u: %u x %u  IntFormat = %s\n",
 417           rb->Name, rb->Width, rb->Height,
 418           _mesa_lookup_enum_by_nr(rb->InternalFormat));
 419    if (writeImage) {
 420       _mesa_write_renderbuffer_image(rb);
 421    }
 422 }
 423
 424
 425 static void
 426 dump_renderbuffer_cb(GLuint id, void *data, void *userData)
 427 {
 428    const struct gl_renderbuffer *rb = (const struct gl_renderbuffer *) data;
 429    (void) userData;
 430    dump_renderbuffer(rb, WriteImages);
 431 }
 432
 433
 434 /**
 435  * Print basic info about all renderbuffers to stdout.
 436  * If dumpImages is true, write PPM of level[0] image to a file.
 437  */
 438 void
 439 _mesa_dump_renderbuffers(GLboolean writeImages)
 440 {
 441    GET_CURRENT_CONTEXT(ctx);
 442    WriteImages = writeImages;
 443    _mesa_HashWalk(ctx->Shared->RenderBuffers, dump_renderbuffer_cb, ctx);
 444 }
 445
 446
 447
 448 void
 449 _mesa_dump_color_buffer(const char *filename)
 450 {
 451    GET_CURRENT_CONTEXT(ctx);
 452    const GLuint w = ctx->DrawBuffer->Width;
 453    const GLuint h = ctx->DrawBuffer->Height;
 454    GLubyte *buf;
 455
 456    buf = malloc(w * h * 4);
 457
 458    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 459    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 460    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 461
 462    _mesa_ReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
 463
 464    printf("ReadBuffer %p 0x%x  DrawBuffer %p 0x%x\n",
 465           (void *) ctx->ReadBuffer->_ColorReadBuffer,
 466           ctx->ReadBuffer->ColorReadBuffer,
 467           (void *) ctx->DrawBuffer->_ColorDrawBuffers[0],
 468           ctx->DrawBuffer->ColorDrawBuffer[0]);
 469    printf("Writing %d x %d color buffer to %s\n", w, h, filename);
 470    write_ppm(filename, buf, w, h, 4, 0, 1, 2, GL_TRUE);
 471
 472    _mesa_PopClientAttrib();
 473
 474    free(buf);
 475 }
 476
 477
 478 void
 479 _mesa_dump_depth_buffer(const char *filename)
 480 {
 481    GET_CURRENT_CONTEXT(ctx);
 482    const GLuint w = ctx->DrawBuffer->Width;
 483    const GLuint h = ctx->DrawBuffer->Height;
 484    GLuint *buf;
 485    GLubyte *buf2;
 486    GLuint i;
 487
 488    buf = malloc(w * h * 4);  /* 4 bpp */
 489    buf2 = malloc(w * h * 3); /* 3 bpp */
 490
 491    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 492    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 493    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 494
 495    _mesa_ReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buf);
 496
 497    /* spread 24 bits of Z across R, G, B */
 498    for (i = 0; i < w * h; i++) {
 499       buf2[i*3+0] = (buf[i] >> 24) & 0xff;
 500       buf2[i*3+1] = (buf[i] >> 16) & 0xff;
 501       buf2[i*3+2] = (buf[i] >>  8) & 0xff;
 502    }
 503
 504    printf("Writing %d x %d depth buffer to %s\n", w, h, filename);
 505    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 506
 507    _mesa_PopClientAttrib();
 508
 509    free(buf);
 510    free(buf2);
 511 }
 512
 513
 514 void
 515 _mesa_dump_stencil_buffer(const char *filename)
 516 {
 517    GET_CURRENT_CONTEXT(ctx);
 518    const GLuint w = ctx->DrawBuffer->Width;
 519    const GLuint h = ctx->DrawBuffer->Height;
 520    GLubyte *buf;
 521    GLubyte *buf2;
 522    GLuint i;
 523
 524    buf = malloc(w * h);  /* 1 bpp */
 525    buf2 = malloc(w * h * 3); /* 3 bpp */
 526
 527    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 528    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 529    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 530
 531    _mesa_ReadPixels(0, 0, w, h, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
 532
 533    for (i = 0; i < w * h; i++) {
 534       buf2[i*3+0] = buf[i];
 535       buf2[i*3+1] = (buf[i] & 127) * 2;
 536       buf2[i*3+2] = (buf[i] - 128) * 2;
 537    }
 538
 539    printf("Writing %d x %d stencil buffer to %s\n", w, h, filename);
 540    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 541
 542    _mesa_PopClientAttrib();
 543
 544    free(buf);
 545    free(buf2);
 546 }
 547
 548
 549 void
 550 _mesa_dump_image(const char *filename, const void *image, GLuint w, GLuint h,
 551                  GLenum format, GLenum type)
 552 {
 553    GLboolean invert = GL_TRUE;
 554
 555    if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
 556       write_ppm(filename, image, w, h, 4, 0, 1, 2, invert);
 557    }
 558    else if (format == GL_BGRA && type == GL_UNSIGNED_BYTE) {
 559       write_ppm(filename, image, w, h, 4, 2, 1, 0, invert);
 560    }
 561    else if (format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE) {
 562       write_ppm(filename, image, w, h, 2, 1, 0, 0, invert);
 563    }
 564    else if (format == GL_RED && type == GL_UNSIGNED_BYTE) {
 565       write_ppm(filename, image, w, h, 1, 0, 0, 0, invert);
 566    }
 567    else if (format == GL_RGBA && type == GL_FLOAT) {
 568       /* convert floats to ubyte */
 569       GLubyte *buf = malloc(w * h * 4 * sizeof(GLubyte));
 570       const GLfloat *f = (const GLfloat *) image;
 571       GLuint i;
 572       for (i = 0; i < w * h * 4; i++) {
 573          UNCLAMPED_FLOAT_TO_UBYTE(buf[i], f[i]);
 574       }
 575       write_ppm(filename, buf, w, h, 4, 0, 1, 2, invert);
 576       free(buf);
 577    }
 578    else if (format == GL_RED && type == GL_FLOAT) {
 579       /* convert floats to ubyte */
 580       GLubyte *buf = malloc(w * h * sizeof(GLubyte));
 581       const GLfloat *f = (const GLfloat *) image;
 582       GLuint i;
 583       for (i = 0; i < w * h; i++) {
 584          UNCLAMPED_FLOAT_TO_UBYTE(buf[i], f[i]);
 585       }
 586       write_ppm(filename, buf, w, h, 1, 0, 0, 0, invert);
 587       free(buf);
 588    }
 589    else {
 590       _mesa_problem(NULL,
 591                  "Unsupported format 0x%x / type 0x%x in _mesa_dump_image()",
 592                  format, type);
 593    }
 594 }
 595
 596
 597 /**
 598  * Quick and dirty function to "print" a texture to stdout.
 599  */
 600 void
 601 _mesa_print_texture(struct gl_context *ctx, struct gl_texture_image *img)
 602 {
 603    const GLint slice = 0;
 604    GLint srcRowStride;
 605    GLuint i, j, c;
 606    GLubyte *data;
 607
 608    ctx->Driver.MapTextureImage(ctx, img, slice,
 609                                0, 0, img->Width, img->Height, GL_MAP_READ_BIT,
 610                                &data, &srcRowStride);
 611
 612    if (!data) {
 613       printf("No texture data\n");
 614    }
 615    else {
 616       /* XXX add more formats or make into a new format utility function */
 617       switch (img->TexFormat) {
 618          case MESA_FORMAT_A8:
 619          case MESA_FORMAT_L8:
 620          case MESA_FORMAT_I8:
 621             c = 1;
 622             break;
 623          case MESA_FORMAT_AL88:
 624          case MESA_FORMAT_AL88_REV:
 625             c = 2;
 626             break;
 627          case MESA_FORMAT_RGB888:
 628          case MESA_FORMAT_BGR888:
 629             c = 3;
 630             break;
 631          case MESA_FORMAT_RGBA8888:
 632          case MESA_FORMAT_ARGB8888:
 633             c = 4;
 634             break;
 635          default:
 636             _mesa_problem(NULL, "error in PrintTexture\n");
 637             return;
 638       }
 639
 640       for (i = 0; i < img->Height; i++) {
 641          for (j = 0; j < img->Width; j++) {
 642             if (c==1)
 643                printf("%02x  ", data[0]);
 644             else if (c==2)
 645                printf("%02x%02x  ", data[0], data[1]);
 646             else if (c==3)
 647                printf("%02x%02x%02x  ", data[0], data[1], data[2]);
 648             else if (c==4)
 649                printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
 650             data += (srcRowStride - img->Width) * c;
 651          }
 652          /* XXX use img->ImageStride here */
 653          printf("\n");
 654
 655       }
 656    }
 657
 658    ctx->Driver.UnmapTextureImage(ctx, img, slice);
 659 }