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_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\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_ARRAY)           ? "ctx->Array, " : "",
  92            (state & _NEW_RENDERMODE)      ? "ctx->RenderMode, " : "",
  93            (state & _NEW_BUFFERS)         ? "ctx->Visual, ctx->DrawBuffer,, " : "");
  94 }
  95
  96
  97
  98 /**
  99  * Print information about this Mesa version and build options.
 100  */
 101 void _mesa_print_info( void )
 102 {
 103    _mesa_debug(NULL, "Mesa GL_VERSION = %s\n",
 104            (char *) _mesa_GetString(GL_VERSION));
 105    _mesa_debug(NULL, "Mesa GL_RENDERER = %s\n",
 106            (char *) _mesa_GetString(GL_RENDERER));
 107    _mesa_debug(NULL, "Mesa GL_VENDOR = %s\n",
 108            (char *) _mesa_GetString(GL_VENDOR));
 109    _mesa_debug(NULL, "Mesa GL_EXTENSIONS = %s\n",
 110            (char *) _mesa_GetString(GL_EXTENSIONS));
 111 #if defined(THREADS)
 112    _mesa_debug(NULL, "Mesa thread-safe: YES\n");
 113 #else
 114    _mesa_debug(NULL, "Mesa thread-safe: NO\n");
 115 #endif
 116 #if defined(USE_X86_ASM)
 117    _mesa_debug(NULL, "Mesa x86-optimized: YES\n");
 118 #else
 119    _mesa_debug(NULL, "Mesa x86-optimized: NO\n");
 120 #endif
 121 #if defined(USE_SPARC_ASM)
 122    _mesa_debug(NULL, "Mesa sparc-optimized: YES\n");
 123 #else
 124    _mesa_debug(NULL, "Mesa sparc-optimized: NO\n");
 125 #endif
 126 }
 127
 128
 129 /**
 130  * Set verbose logging flags.  When these flags are set, GL API calls
 131  * in the various categories will be printed to stderr.
 132  * \param str  a comma-separated list of keywords
 133  */
 134 static void
 135 set_verbose_flags(const char *str)
 136 {
 137 #ifdef DEBUG
 138    struct option {
 139       const char *name;
 140       GLbitfield flag;
 141    };
 142    static const struct option opts[] = {
 143       { "varray",    VERBOSE_VARRAY },
 144       { "tex",       VERBOSE_TEXTURE },
 145       { "mat",       VERBOSE_MATERIAL },
 146       { "pipe",      VERBOSE_PIPELINE },
 147       { "driver",    VERBOSE_DRIVER },
 148       { "state",     VERBOSE_STATE },
 149       { "api",       VERBOSE_API },
 150       { "list",      VERBOSE_DISPLAY_LIST },
 151       { "lighting",  VERBOSE_LIGHTING },
 152       { "disassem",  VERBOSE_DISASSEM },
 153       { "draw",      VERBOSE_DRAW },
 154       { "swap",      VERBOSE_SWAPBUFFERS }
 155    };
 156    GLuint i;
 157
 158    if (!str)
 159       return;
 160
 161    MESA_VERBOSE = 0x0;
 162    for (i = 0; i < Elements(opts); i++) {
 163       if (strstr(str, opts[i].name) || strcmp(str, "all") == 0)
 164          MESA_VERBOSE |= opts[i].flag;
 165    }
 166 #endif
 167 }
 168
 169
 170 /**
 171  * Set debugging flags.  When these flags are set, Mesa will do additional
 172  * debug checks or actions.
 173  * \param str  a comma-separated list of keywords
 174  */
 175 static void
 176 set_debug_flags(const char *str)
 177 {
 178 #ifdef DEBUG
 179    struct option {
 180       const char *name;
 181       GLbitfield flag;
 182    };
 183    static const struct option opts[] = {
 184       { "silent", DEBUG_SILENT }, /* turn off debug messages */
 185       { "flush", DEBUG_ALWAYS_FLUSH }, /* flush after each drawing command */
 186       { "incomplete_tex", DEBUG_INCOMPLETE_TEXTURE },
 187       { "incomplete_fbo", DEBUG_INCOMPLETE_FBO }
 188    };
 189    GLuint i;
 190
 191    if (!str)
 192       return;
 193
 194    MESA_DEBUG_FLAGS = 0x0;
 195    for (i = 0; i < Elements(opts); i++) {
 196       if (strstr(str, opts[i].name))
 197          MESA_DEBUG_FLAGS |= opts[i].flag;
 198    }
 199 #endif
 200 }
 201
 202
 203 /**
 204  * Initialize debugging variables from env vars.
 205  */
 206 void
 207 _mesa_init_debug( struct gl_context *ctx )
 208 {
 209    set_debug_flags(_mesa_getenv("MESA_DEBUG"));
 210    set_verbose_flags(_mesa_getenv("MESA_VERBOSE"));
 211 }
 212
 213
 214 /*
 215  * Write ppm file
 216  */
 217 static void
 218 write_ppm(const char *filename, const GLubyte *buffer, int width, int height,
 219           int comps, int rcomp, int gcomp, int bcomp, GLboolean invert)
 220 {
 221    FILE *f = fopen( filename, "w" );
 222    if (f) {
 223       int x, y;
 224       const GLubyte *ptr = buffer;
 225       fprintf(f,"P6\n");
 226       fprintf(f,"# ppm-file created by osdemo.c\n");
 227       fprintf(f,"%i %i\n", width,height);
 228       fprintf(f,"255\n");
 229       fclose(f);
 230       f = fopen( filename, "ab" );  /* reopen in binary append mode */
 231       for (y=0; y < height; y++) {
 232          for (x = 0; x < width; x++) {
 233             int yy = invert ? (height - 1 - y) : y;
 234             int i = (yy * width + x) * comps;
 235             fputc(ptr[i+rcomp], f); /* write red */
 236             fputc(ptr[i+gcomp], f); /* write green */
 237             fputc(ptr[i+bcomp], f); /* write blue */
 238          }
 239       }
 240       fclose(f);
 241    }
 242    else {
 243       fprintf(stderr, "Unable to create %s in write_ppm()\n", filename);
 244    }
 245 }
 246
 247
 248 /**
 249  * Write a texture image to a ppm file.
 250  * \param face  cube face in [0,5]
 251  * \param level  mipmap level
 252  */
 253 static void
 254 write_texture_image(struct gl_texture_object *texObj,
 255                     GLuint face, GLuint level)
 256 {
 257    struct gl_texture_image *img = texObj->Image[face][level];
 258    if (img) {
 259       GET_CURRENT_CONTEXT(ctx);
 260       struct gl_pixelstore_attrib store;
 261       GLubyte *buffer;
 262       char s[100];
 263
 264       buffer = malloc(img->Width * img->Height
 265                                         * img->Depth * 4);
 266
 267       store = ctx->Pack; /* save */
 268       ctx->Pack = ctx->DefaultPacking;
 269
 270       ctx->Driver.GetTexImage(ctx, GL_RGBA, GL_UNSIGNED_BYTE, buffer, img);
 271
 272       /* make filename */
 273       _mesa_snprintf(s, sizeof(s), "/tmp/tex%u.l%u.f%u.ppm", texObj->Name, level, face);
 274
 275       printf("  Writing image level %u to %s\n", level, s);
 276       write_ppm(s, buffer, img->Width, img->Height, 4, 0, 1, 2, GL_FALSE);
 277
 278       ctx->Pack = store; /* restore */
 279
 280       free(buffer);
 281    }
 282 }
 283
 284
 285 /**
 286  * Write renderbuffer image to a ppm file.
 287  */
 288 void
 289 _mesa_write_renderbuffer_image(const struct gl_renderbuffer *rb)
 290 {
 291    GET_CURRENT_CONTEXT(ctx);
 292    GLubyte *buffer;
 293    char s[100];
 294    GLenum format, type;
 295
 296    if (rb->_BaseFormat == GL_RGB ||
 297        rb->_BaseFormat == GL_RGBA) {
 298       format = GL_RGBA;
 299       type = GL_UNSIGNED_BYTE;
 300    }
 301    else if (rb->_BaseFormat == GL_DEPTH_STENCIL) {
 302       format = GL_DEPTH_STENCIL;
 303       type = GL_UNSIGNED_INT_24_8;
 304    }
 305    else {
 306       _mesa_debug(NULL,
 307                   "Unsupported BaseFormat 0x%x in "
 308                   "_mesa_write_renderbuffer_image()\n",
 309                   rb->_BaseFormat);
 310       return;
 311    }
 312
 313    buffer = malloc(rb->Width * rb->Height * 4);
 314
 315    ctx->Driver.ReadPixels(ctx, 0, 0, rb->Width, rb->Height,
 316                           format, type, &ctx->DefaultPacking, buffer);
 317
 318    /* make filename */
 319    _mesa_snprintf(s, sizeof(s), "/tmp/renderbuffer%u.ppm", rb->Name);
 320    _mesa_snprintf(s, sizeof(s), "C:\\renderbuffer%u.ppm", rb->Name);
 321
 322    printf("  Writing renderbuffer image to %s\n", s);
 323
 324    _mesa_debug(NULL, "  Writing renderbuffer image to %s\n", s);
 325
 326    write_ppm(s, buffer, rb->Width, rb->Height, 4, 0, 1, 2, GL_TRUE);
 327
 328    free(buffer);
 329 }
 330
 331
 332 /** How many texture images (mipmap levels, faces) to write to files */
 333 #define WRITE_NONE 0
 334 #define WRITE_ONE  1
 335 #define WRITE_ALL  2
 336
 337 static GLuint WriteImages;
 338
 339
 340 static void
 341 dump_texture(struct gl_texture_object *texObj, GLuint writeImages)
 342 {
 343    const GLuint numFaces = texObj->Target == GL_TEXTURE_CUBE_MAP ? 6 : 1;
 344    GLboolean written = GL_FALSE;
 345    GLuint i, j;
 346
 347    printf("Texture %u\n", texObj->Name);
 348    printf("  Target %s\n", tex_target_name(texObj->Target));
 349    for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 350       for (j = 0; j < numFaces; j++) {
 351          struct gl_texture_image *texImg = texObj->Image[j][i];
 352          if (texImg) {
 353             printf("  Face %u level %u: %d x %d x %d, format %s\n",
 354                    j, i,
 355                    texImg->Width, texImg->Height, texImg->Depth,
 356                    _mesa_get_format_name(texImg->TexFormat));
 357             if (writeImages == WRITE_ALL ||
 358                 (writeImages == WRITE_ONE && !written)) {
 359                write_texture_image(texObj, j, i);
 360                written = GL_TRUE;
 361             }
 362          }
 363       }
 364    }
 365 }
 366
 367
 368 /**
 369  * Dump a single texture.
 370  */
 371 void
 372 _mesa_dump_texture(GLuint texture, GLuint writeImages)
 373 {
 374    GET_CURRENT_CONTEXT(ctx);
 375    struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, texture);
 376    if (texObj) {
 377       dump_texture(texObj, writeImages);
 378    }
 379 }
 380
 381
 382 static void
 383 dump_texture_cb(GLuint id, void *data, void *userData)
 384 {
 385    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 386    (void) userData;
 387    dump_texture(texObj, WriteImages);
 388 }
 389
 390
 391 /**
 392  * Print basic info about all texture objext to stdout.
 393  * If dumpImages is true, write PPM of level[0] image to a file.
 394  */
 395 void
 396 _mesa_dump_textures(GLuint writeImages)
 397 {
 398    GET_CURRENT_CONTEXT(ctx);
 399    WriteImages = writeImages;
 400    _mesa_HashWalk(ctx->Shared->TexObjects, dump_texture_cb, ctx);
 401 }
 402
 403
 404 static void
 405 dump_renderbuffer(const struct gl_renderbuffer *rb, GLboolean writeImage)
 406 {
 407    printf("Renderbuffer %u: %u x %u  IntFormat = %s\n",
 408           rb->Name, rb->Width, rb->Height,
 409           _mesa_lookup_enum_by_nr(rb->InternalFormat));
 410    if (writeImage) {
 411       _mesa_write_renderbuffer_image(rb);
 412    }
 413 }
 414
 415
 416 static void
 417 dump_renderbuffer_cb(GLuint id, void *data, void *userData)
 418 {
 419    const struct gl_renderbuffer *rb = (const struct gl_renderbuffer *) data;
 420    (void) userData;
 421    dump_renderbuffer(rb, WriteImages);
 422 }
 423
 424
 425 /**
 426  * Print basic info about all renderbuffers to stdout.
 427  * If dumpImages is true, write PPM of level[0] image to a file.
 428  */
 429 void
 430 _mesa_dump_renderbuffers(GLboolean writeImages)
 431 {
 432    GET_CURRENT_CONTEXT(ctx);
 433    WriteImages = writeImages;
 434    _mesa_HashWalk(ctx->Shared->RenderBuffers, dump_renderbuffer_cb, ctx);
 435 }
 436
 437
 438
 439 void
 440 _mesa_dump_color_buffer(const char *filename)
 441 {
 442    GET_CURRENT_CONTEXT(ctx);
 443    const GLuint w = ctx->DrawBuffer->Width;
 444    const GLuint h = ctx->DrawBuffer->Height;
 445    GLubyte *buf;
 446
 447    buf = malloc(w * h * 4);
 448
 449    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 450    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 451    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 452
 453    _mesa_ReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, buf);
 454
 455    printf("ReadBuffer %p 0x%x  DrawBuffer %p 0x%x\n",
 456           (void *) ctx->ReadBuffer->_ColorReadBuffer,
 457           ctx->ReadBuffer->ColorReadBuffer,
 458           (void *) ctx->DrawBuffer->_ColorDrawBuffers[0],
 459           ctx->DrawBuffer->ColorDrawBuffer[0]);
 460    printf("Writing %d x %d color buffer to %s\n", w, h, filename);
 461    write_ppm(filename, buf, w, h, 4, 0, 1, 2, GL_TRUE);
 462
 463    _mesa_PopClientAttrib();
 464
 465    free(buf);
 466 }
 467
 468
 469 void
 470 _mesa_dump_depth_buffer(const char *filename)
 471 {
 472    GET_CURRENT_CONTEXT(ctx);
 473    const GLuint w = ctx->DrawBuffer->Width;
 474    const GLuint h = ctx->DrawBuffer->Height;
 475    GLuint *buf;
 476    GLubyte *buf2;
 477    GLuint i;
 478
 479    buf = malloc(w * h * 4);  /* 4 bpp */
 480    buf2 = malloc(w * h * 3); /* 3 bpp */
 481
 482    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 483    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 484    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 485
 486    _mesa_ReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buf);
 487
 488    /* spread 24 bits of Z across R, G, B */
 489    for (i = 0; i < w * h; i++) {
 490       buf2[i*3+0] = (buf[i] >> 24) & 0xff;
 491       buf2[i*3+1] = (buf[i] >> 16) & 0xff;
 492       buf2[i*3+2] = (buf[i] >>  8) & 0xff;
 493    }
 494
 495    printf("Writing %d x %d depth buffer to %s\n", w, h, filename);
 496    write_ppm(filename, buf2, w, h, 3, 0, 1, 2, GL_TRUE);
 497
 498    _mesa_PopClientAttrib();
 499
 500    free(buf);
 501    free(buf2);
 502 }
 503
 504
 505 void
 506 _mesa_dump_stencil_buffer(const char *filename)
 507 {
 508    GET_CURRENT_CONTEXT(ctx);
 509    const GLuint w = ctx->DrawBuffer->Width;
 510    const GLuint h = ctx->DrawBuffer->Height;
 511    GLubyte *buf;
 512    GLubyte *buf2;
 513    GLuint i;
 514
 515    buf = malloc(w * h);  /* 1 bpp */
 516    buf2 = malloc(w * h * 3); /* 3 bpp */
 517
 518    _mesa_PushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 519    _mesa_PixelStorei(GL_PACK_ALIGNMENT, 1);
 520    _mesa_PixelStorei(GL_PACK_INVERT_MESA, GL_TRUE);
 521
 522    _mesa_ReadPixels(0, 0, w, h, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buf);
 523
 524    for (i = 0; i < w * h; i++) {
 525       buf2[i*3+0] = buf[i];
 526       buf2[i*3+1] = (buf[i] & 127) * 2;
 527       buf2[i*3+2] = (buf[i] - 128) * 2;
 528    }
 529
 530    printf("Writing %d x %d stencil 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_image(const char *filename, const void *image, GLuint w, GLuint h,
 542                  GLenum format, GLenum type)
 543 {
 544    GLboolean invert = GL_TRUE;
 545
 546    if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
 547       write_ppm(filename, image, w, h, 4, 0, 1, 2, invert);
 548    }
 549    else if (format == GL_BGRA && type == GL_UNSIGNED_BYTE) {
 550       write_ppm(filename, image, w, h, 4, 2, 1, 0, invert);
 551    }
 552    else if (format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE) {
 553       write_ppm(filename, image, w, h, 2, 1, 0, 0, invert);
 554    }
 555    else if (format == GL_RED && type == GL_UNSIGNED_BYTE) {
 556       write_ppm(filename, image, w, h, 1, 0, 0, 0, invert);
 557    }
 558    else if (format == GL_RGBA && type == GL_FLOAT) {
 559       /* convert floats to ubyte */
 560       GLubyte *buf = malloc(w * h * 4 * sizeof(GLubyte));
 561       const GLfloat *f = (const GLfloat *) image;
 562       GLuint i;
 563       for (i = 0; i < w * h * 4; i++) {
 564          UNCLAMPED_FLOAT_TO_UBYTE(buf[i], f[i]);
 565       }
 566       write_ppm(filename, buf, w, h, 4, 0, 1, 2, invert);
 567       free(buf);
 568    }
 569    else if (format == GL_RED && type == GL_FLOAT) {
 570       /* convert floats to ubyte */
 571       GLubyte *buf = malloc(w * h * sizeof(GLubyte));
 572       const GLfloat *f = (const GLfloat *) image;
 573       GLuint i;
 574       for (i = 0; i < w * h; i++) {
 575          UNCLAMPED_FLOAT_TO_UBYTE(buf[i], f[i]);
 576       }
 577       write_ppm(filename, buf, w, h, 1, 0, 0, 0, invert);
 578       free(buf);
 579    }
 580    else {
 581       _mesa_problem(NULL,
 582                  "Unsupported format 0x%x / type 0x%x in _mesa_dump_image()",
 583                  format, type);
 584    }
 585 }
 586
 587
 588 /**
 589  * Quick and dirty function to "print" a texture to stdout.
 590  */
 591 void
 592 _mesa_print_texture(struct gl_context *ctx, struct gl_texture_image *img)
 593 {
 594    const GLint slice = 0;
 595    GLint srcRowStride;
 596    GLuint i, j, c;
 597    GLubyte *data;
 598
 599    ctx->Driver.MapTextureImage(ctx, img, slice,
 600                                0, 0, img->Width, img->Height, GL_MAP_READ_BIT,
 601                                &data, &srcRowStride);
 602
 603    if (!data) {
 604       printf("No texture data\n");
 605    }
 606    else {
 607       /* XXX add more formats or make into a new format utility function */
 608       switch (img->TexFormat) {
 609          case MESA_FORMAT_A8:
 610          case MESA_FORMAT_L8:
 611          case MESA_FORMAT_I8:
 612             c = 1;
 613             break;
 614          case MESA_FORMAT_AL88:
 615          case MESA_FORMAT_AL88_REV:
 616             c = 2;
 617             break;
 618          case MESA_FORMAT_RGB888:
 619          case MESA_FORMAT_BGR888:
 620             c = 3;
 621             break;
 622          case MESA_FORMAT_RGBA8888:
 623          case MESA_FORMAT_ARGB8888:
 624             c = 4;
 625             break;
 626          default:
 627             _mesa_problem(NULL, "error in PrintTexture\n");
 628             return;
 629       }
 630
 631       for (i = 0; i < img->Height; i++) {
 632          for (j = 0; j < img->Width; j++) {
 633             if (c==1)
 634                printf("%02x  ", data[0]);
 635             else if (c==2)
 636                printf("%02x%02x  ", data[0], data[1]);
 637             else if (c==3)
 638                printf("%02x%02x%02x  ", data[0], data[1], data[2]);
 639             else if (c==4)
 640                printf("%02x%02x%02x%02x  ", data[0], data[1], data[2], data[3]);
 641             data += (srcRowStride - img->Width) * c;
 642          }
 643          /* XXX use img->ImageStride here */
 644          printf("\n");
 645
 646       }
 647    }
 648
 649    ctx->Driver.UnmapTextureImage(ctx, img, slice);
 650 }