progs/xdemos/glxinfo.c

   1 /*
   2  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  */
  21
  22
  23 /*
  24  * This program is a work-alike of the IRIX glxinfo program.
  25  * Command line options:
  26  *  -t                     print wide table
  27  *  -v                     print verbose information
  28  *  -display DisplayName   specify the X display to interogate
  29  *  -b                     only print ID of "best" visual on screen 0
  30  *  -i                     use indirect rendering connection only
  31  *  -l                     print interesting OpenGL limits (added 5 Sep 2002)
  32  *
  33  * Brian Paul  26 January 2000
  34  */
  35
  36 #define GLX_GLXEXT_PROTOTYPES
  37
  38 #include <X11/Xlib.h>
  39 #include <X11/Xutil.h>
  40 #include <GL/gl.h>
  41 #include <GL/glx.h>
  42 #include <stdio.h>
  43 #include <string.h>
  44 #include <stdlib.h>
  45
  46
  47 #ifndef GLX_NONE_EXT
  48 #define GLX_NONE_EXT  0x8000
  49 #endif
  50
  51 #ifndef GLX_TRANSPARENT_RGB
  52 #define GLX_TRANSPARENT_RGB 0x8008
  53 #endif
  54
  55 #ifndef GLX_RGBA_BIT
  56 #define GLX_RGBA_BIT                    0x00000001
  57 #endif
  58
  59 #ifndef GLX_COLOR_INDEX_BIT
  60 #define GLX_COLOR_INDEX_BIT             0x00000002
  61 #endif
  62
  63 typedef enum
  64 {
  65    Normal,
  66    Wide,
  67    Verbose
  68 } InfoMode;
  69
  70
  71 struct visual_attribs
  72 {
  73    /* X visual attribs */
  74    int id;
  75    int klass;
  76    int depth;
  77    int redMask, greenMask, blueMask;
  78    int colormapSize;
  79    int bitsPerRGB;
  80
  81    /* GL visual attribs */
  82    int supportsGL;
  83    int transparentType;
  84    int transparentRedValue;
  85    int transparentGreenValue;
  86    int transparentBlueValue;
  87    int transparentAlphaValue;
  88    int transparentIndexValue;
  89    int bufferSize;
  90    int level;
  91    int render_type;
  92    int doubleBuffer;
  93    int stereo;
  94    int auxBuffers;
  95    int redSize, greenSize, blueSize, alphaSize;
  96    int depthSize;
  97    int stencilSize;
  98    int accumRedSize, accumGreenSize, accumBlueSize, accumAlphaSize;
  99    int numSamples, numMultisample;
 100    int visualCaveat;
 101 };
 102
 103
 104 /*
 105  * Print a list of extensions, with word-wrapping.
 106  */
 107 static void
 108 print_extension_list(const char *ext)
 109 {
 110    const char *indentString = "    ";
 111    const int indent = 4;
 112    const int max = 79;
 113    int width, i, j;
 114
 115    if (!ext || !ext[0])
 116       return;
 117
 118    width = indent;
 119    printf(indentString);
 120    i = j = 0;
 121    while (1) {
 122       if (ext[j] == ' ' || ext[j] == 0) {
 123          /* found end of an extension name */
 124          const int len = j - i;
 125          if (width + len > max) {
 126             /* start a new line */
 127             printf("\n");
 128             width = indent;
 129             printf(indentString);
 130          }
 131          /* print the extension name between ext[i] and ext[j] */
 132          while (i < j) {
 133             printf("%c", ext[i]);
 134             i++;
 135          }
 136          /* either we're all done, or we'll continue with next extension */
 137          width += len + 1;
 138          if (ext[j] == 0) {
 139             break;
 140          }
 141          else {
 142             i++;
 143             j++;
 144             if (ext[j] == 0)
 145                break;
 146             printf(", ");
 147             width += 2;
 148          }
 149       }
 150       j++;
 151    }
 152    printf("\n");
 153 }
 154
 155
 156 static void
 157 print_display_info(Display *dpy)
 158 {
 159    printf("name of display: %s\n", DisplayString(dpy));
 160 }
 161
 162
 163 /**
 164  * Print interesting limits for vertex/fragment programs.
 165  */
 166 static void
 167 print_program_limits(GLenum target)
 168 {
 169 #if defined(GL_ARB_vertex_program) || defined(GL_ARB_fragment_program)
 170    struct token_name {
 171       GLenum token;
 172       const char *name;
 173    };
 174    static const struct token_name limits[] = {
 175       { GL_MAX_PROGRAM_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_INSTRUCTIONS_ARB" },
 176       { GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB" },
 177       { GL_MAX_PROGRAM_TEMPORARIES_ARB, "GL_MAX_PROGRAM_TEMPORARIES_ARB" },
 178       { GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB, "GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB" },
 179       { GL_MAX_PROGRAM_PARAMETERS_ARB, "GL_MAX_PROGRAM_PARAMETERS_ARB" },
 180       { GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB, "GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB" },
 181       { GL_MAX_PROGRAM_ATTRIBS_ARB, "GL_MAX_PROGRAM_ATTRIBS_ARB" },
 182       { GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB, "GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB" },
 183       { GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB, "GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB" },
 184       { GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB, "GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB" },
 185       { GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB, "GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB" },
 186       { GL_MAX_PROGRAM_ENV_PARAMETERS_ARB, "GL_MAX_PROGRAM_ENV_PARAMETERS_ARB" },
 187       { GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB" },
 188       { GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB" },
 189       { GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB, "GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB" },
 190       { GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB" },
 191       { GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB" },
 192       { GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB" },
 193       { (GLenum) 0, NULL }
 194    };
 195    PFNGLGETPROGRAMIVARBPROC GetProgramivARB_func = (PFNGLGETPROGRAMIVARBPROC)
 196       glXGetProcAddressARB((GLubyte *) "glGetProgramivARB");
 197    GLint max[1];
 198    int i;
 199
 200    if (target == GL_VERTEX_PROGRAM_ARB) {
 201       printf("    GL_VERTEX_PROGRAM_ARB:\n");
 202    }
 203    else if (target == GL_FRAGMENT_PROGRAM_ARB) {
 204       printf("    GL_FRAGMENT_PROGRAM_ARB:\n");
 205    }
 206    else {
 207       return; /* something's wrong */
 208    }
 209
 210    for (i = 0; limits[i].token; i++) {
 211       GetProgramivARB_func(target, limits[i].token, max);
 212       if (glGetError() == GL_NO_ERROR) {
 213          printf("        %s = %d\n", limits[i].name, max[0]);
 214       }
 215    }
 216 #endif /* GL_ARB_vertex_program / GL_ARB_fragment_program */
 217 }
 218
 219
 220 /**
 221  * Print interesting limits for vertex/fragment shaders.
 222  */
 223 static void
 224 print_shader_limits(GLenum target)
 225 {
 226    struct token_name {
 227       GLenum token;
 228       const char *name;
 229    };
 230 #if defined(GL_ARB_vertex_shader)
 231    static const struct token_name vertex_limits[] = {
 232       { GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB, "GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB" },
 233       { GL_MAX_VARYING_FLOATS_ARB, "GL_MAX_VARYING_FLOATS_ARB" },
 234       { GL_MAX_VERTEX_ATTRIBS_ARB, "GL_MAX_VERTEX_ATTRIBS_ARB" },
 235       { GL_MAX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_TEXTURE_IMAGE_UNITS_ARB" },
 236       { GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB" },
 237       { GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB" },
 238       { GL_MAX_TEXTURE_COORDS_ARB, "GL_MAX_TEXTURE_COORDS_ARB" },
 239       { (GLenum) 0, NULL }
 240    };
 241 #endif
 242 #if defined(GL_ARB_fragment_shader)
 243    static const struct token_name fragment_limits[] = {
 244       { GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB, "GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB" },
 245       { GL_MAX_TEXTURE_COORDS_ARB, "GL_MAX_TEXTURE_COORDS_ARB" },
 246       { GL_MAX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_TEXTURE_IMAGE_UNITS_ARB" },
 247       { (GLenum) 0, NULL }
 248    };
 249 #endif
 250    GLint max[1];
 251    int i;
 252
 253 #if defined(GL_ARB_vertex_shader)
 254    if (target == GL_VERTEX_SHADER_ARB) {
 255       printf("    GL_VERTEX_SHADER_ARB:\n");
 256       for (i = 0; vertex_limits[i].token; i++) {
 257          glGetIntegerv(vertex_limits[i].token, max);
 258          if (glGetError() == GL_NO_ERROR) {
 259             printf("        %s = %d\n", vertex_limits[i].name, max[0]);
 260          }
 261       }
 262    }
 263 #endif
 264 #if defined(GL_ARB_fragment_shader)
 265    if (target == GL_FRAGMENT_SHADER_ARB) {
 266       printf("    GL_FRAGMENT_SHADER_ARB:\n");
 267       for (i = 0; fragment_limits[i].token; i++) {
 268          glGetIntegerv(fragment_limits[i].token, max);
 269          if (glGetError() == GL_NO_ERROR) {
 270             printf("        %s = %d\n", fragment_limits[i].name, max[0]);
 271          }
 272       }
 273    }
 274 #endif
 275 }
 276
 277
 278 /**
 279  * Print interesting OpenGL implementation limits.
 280  */
 281 static void
 282 print_limits(const char *extensions)
 283 {
 284    struct token_name {
 285       GLuint count;
 286       GLenum token;
 287       const char *name;
 288    };
 289    static const struct token_name limits[] = {
 290       { 1, GL_MAX_ATTRIB_STACK_DEPTH, "GL_MAX_ATTRIB_STACK_DEPTH" },
 291       { 1, GL_MAX_CLIENT_ATTRIB_STACK_DEPTH, "GL_MAX_CLIENT_ATTRIB_STACK_DEPTH" },
 292       { 1, GL_MAX_CLIP_PLANES, "GL_MAX_CLIP_PLANES" },
 293       { 1, GL_MAX_COLOR_MATRIX_STACK_DEPTH, "GL_MAX_COLOR_MATRIX_STACK_DEPTH" },
 294       { 1, GL_MAX_ELEMENTS_VERTICES, "GL_MAX_ELEMENTS_VERTICES" },
 295       { 1, GL_MAX_ELEMENTS_INDICES, "GL_MAX_ELEMENTS_INDICES" },
 296       { 1, GL_MAX_EVAL_ORDER, "GL_MAX_EVAL_ORDER" },
 297       { 1, GL_MAX_LIGHTS, "GL_MAX_LIGHTS" },
 298       { 1, GL_MAX_LIST_NESTING, "GL_MAX_LIST_NESTING" },
 299       { 1, GL_MAX_MODELVIEW_STACK_DEPTH, "GL_MAX_MODELVIEW_STACK_DEPTH" },
 300       { 1, GL_MAX_NAME_STACK_DEPTH, "GL_MAX_NAME_STACK_DEPTH" },
 301       { 1, GL_MAX_PIXEL_MAP_TABLE, "GL_MAX_PIXEL_MAP_TABLE" },
 302       { 1, GL_MAX_PROJECTION_STACK_DEPTH, "GL_MAX_PROJECTION_STACK_DEPTH" },
 303       { 1, GL_MAX_TEXTURE_STACK_DEPTH, "GL_MAX_TEXTURE_STACK_DEPTH" },
 304       { 1, GL_MAX_TEXTURE_SIZE, "GL_MAX_TEXTURE_SIZE" },
 305       { 1, GL_MAX_3D_TEXTURE_SIZE, "GL_MAX_3D_TEXTURE_SIZE" },
 306       { 2, GL_MAX_VIEWPORT_DIMS, "GL_MAX_VIEWPORT_DIMS" },
 307       { 2, GL_ALIASED_LINE_WIDTH_RANGE, "GL_ALIASED_LINE_WIDTH_RANGE" },
 308       { 2, GL_SMOOTH_LINE_WIDTH_RANGE, "GL_SMOOTH_LINE_WIDTH_RANGE" },
 309       { 2, GL_ALIASED_POINT_SIZE_RANGE, "GL_ALIASED_POINT_SIZE_RANGE" },
 310       { 2, GL_SMOOTH_POINT_SIZE_RANGE, "GL_SMOOTH_POINT_SIZE_RANGE" },
 311 #if defined(GL_ARB_texture_cube_map)
 312       { 1, GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB, "GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB" },
 313 #endif
 314 #if defined(GLX_NV_texture_rectangle)
 315       { 1, GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, "GL_MAX_RECTANGLE_TEXTURE_SIZE_NV" },
 316 #endif
 317 #if defined(GL_ARB_texture_compression)
 318       { 1, GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB, "GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB" },
 319 #endif
 320 #if defined(GL_ARB_multitexture)
 321       { 1, GL_MAX_TEXTURE_UNITS_ARB, "GL_MAX_TEXTURE_UNITS_ARB" },
 322 #endif
 323 #if defined(GL_EXT_texture_lod_bias)
 324       { 1, GL_MAX_TEXTURE_LOD_BIAS_EXT, "GL_MAX_TEXTURE_LOD_BIAS_EXT" },
 325 #endif
 326 #if defined(GL_EXT_texture_filter_anisotropic)
 327       { 1, GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, "GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT" },
 328 #endif
 329 #if defined(GL_ARB_draw_buffers)
 330       { 1, GL_MAX_DRAW_BUFFERS_ARB, "GL_MAX_DRAW_BUFFERS_ARB" },
 331 #endif
 332       { 0, (GLenum) 0, NULL }
 333    };
 334    GLint i, max[2];
 335
 336    printf("OpenGL limits:\n");
 337    for (i = 0; limits[i].count; i++) {
 338       glGetIntegerv(limits[i].token, max);
 339       if (glGetError() == GL_NO_ERROR) {
 340          if (limits[i].count == 1)
 341             printf("    %s = %d\n", limits[i].name, max[0]);
 342          else /* XXX fix if we ever query something with more than 2 values */
 343             printf("    %s = %d, %d\n", limits[i].name, max[0], max[1]);
 344       }
 345    }
 346
 347    /* these don't fit into the above mechanism, unfortunately */
 348    glGetConvolutionParameteriv(GL_CONVOLUTION_2D, GL_MAX_CONVOLUTION_WIDTH, max);
 349    glGetConvolutionParameteriv(GL_CONVOLUTION_2D, GL_MAX_CONVOLUTION_HEIGHT, max+1);
 350    if (glGetError() == GL_NONE) {
 351       printf("    GL_MAX_CONVOLUTION_WIDTH/HEIGHT = %d, %d\n", max[0], max[1]);
 352    }
 353
 354 #if defined(GL_ARB_vertex_program)
 355    if (strstr(extensions, "GL_ARB_vertex_program")) {
 356       print_program_limits(GL_VERTEX_PROGRAM_ARB);
 357    }
 358 #endif
 359 #if defined(GL_ARB_fragment_program)
 360    if (strstr(extensions, "GL_ARB_fragment_program")) {
 361       print_program_limits(GL_FRAGMENT_PROGRAM_ARB);
 362    }
 363 #endif
 364 #if defined(GL_ARB_vertex_shader)
 365    if (strstr(extensions, "GL_ARB_vertex_shader")) {
 366       print_shader_limits(GL_VERTEX_SHADER_ARB);
 367    }
 368 #endif
 369 #if defined(GL_ARB_fragment_shader)
 370    if (strstr(extensions, "GL_ARB_fragment_shader")) {
 371       print_shader_limits(GL_FRAGMENT_SHADER_ARB);
 372    }
 373 #endif
 374 }
 375
 376
 377 static void
 378 print_screen_info(Display *dpy, int scrnum, Bool allowDirect, GLboolean limits)
 379 {
 380    Window win;
 381    int attribSingle[] = {
 382       GLX_RGBA,
 383       GLX_RED_SIZE, 1,
 384       GLX_GREEN_SIZE, 1,
 385       GLX_BLUE_SIZE, 1,
 386       None };
 387    int attribDouble[] = {
 388       GLX_RGBA,
 389       GLX_RED_SIZE, 1,
 390       GLX_GREEN_SIZE, 1,
 391       GLX_BLUE_SIZE, 1,
 392       GLX_DOUBLEBUFFER,
 393       None };
 394
 395    XSetWindowAttributes attr;
 396    unsigned long mask;
 397    Window root;
 398    GLXContext ctx = NULL;
 399    XVisualInfo *visinfo;
 400    int width = 100, height = 100;
 401
 402    root = RootWindow(dpy, scrnum);
 403
 404    visinfo = glXChooseVisual(dpy, scrnum, attribSingle);
 405    if (!visinfo)
 406       visinfo = glXChooseVisual(dpy, scrnum, attribDouble);
 407
 408    if (visinfo)
 409       ctx = glXCreateContext( dpy, visinfo, NULL, allowDirect );
 410
 411 #ifdef GLX_VERSION_1_3
 412    {
 413       int fbAttribSingle[] = {
 414          GLX_RENDER_TYPE,   GLX_RGBA_BIT,
 415          GLX_RED_SIZE,      1,
 416          GLX_GREEN_SIZE,    1,
 417          GLX_BLUE_SIZE,     1,
 418          GLX_DOUBLEBUFFER,  GL_TRUE,
 419          None };
 420       int fbAttribDouble[] = {
 421          GLX_RENDER_TYPE,   GLX_RGBA_BIT,
 422          GLX_RED_SIZE,      1,
 423          GLX_GREEN_SIZE,    1,
 424          GLX_BLUE_SIZE,     1,
 425          None };
 426       GLXFBConfig *configs = NULL;
 427       int nConfigs;
 428
 429       if (!visinfo)
 430          configs = glXChooseFBConfig(dpy, scrnum, fbAttribSingle, &nConfigs);
 431       if (!visinfo)
 432          configs = glXChooseFBConfig(dpy, scrnum, fbAttribDouble, &nConfigs);
 433
 434       if (configs) {
 435          visinfo = glXGetVisualFromFBConfig(dpy, configs[0]);
 436          ctx = glXCreateNewContext(dpy, configs[0], GLX_RGBA_TYPE, NULL, allowDirect);
 437          XFree(configs);
 438       }
 439    }
 440 #endif
 441
 442    if (!visinfo) {
 443       fprintf(stderr, "Error: couldn't find RGB GLX visual or fbconfig\n");
 444       return;
 445    }
 446
 447    if (!ctx) {
 448       fprintf(stderr, "Error: glXCreateContext failed\n");
 449       XFree(visinfo);
 450       return;
 451    }
 452
 453    attr.background_pixel = 0;
 454    attr.border_pixel = 0;
 455    attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
 456    attr.event_mask = StructureNotifyMask | ExposureMask;
 457    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 458    win = XCreateWindow(dpy, root, 0, 0, width, height,
 459                        0, visinfo->depth, InputOutput,
 460                        visinfo->visual, mask, &attr);
 461
 462    if (glXMakeCurrent(dpy, win, ctx)) {
 463       const char *serverVendor = glXQueryServerString(dpy, scrnum, GLX_VENDOR);
 464       const char *serverVersion = glXQueryServerString(dpy, scrnum, GLX_VERSION);
 465       const char *serverExtensions = glXQueryServerString(dpy, scrnum, GLX_EXTENSIONS);
 466       const char *clientVendor = glXGetClientString(dpy, GLX_VENDOR);
 467       const char *clientVersion = glXGetClientString(dpy, GLX_VERSION);
 468       const char *clientExtensions = glXGetClientString(dpy, GLX_EXTENSIONS);
 469       const char *glxExtensions = glXQueryExtensionsString(dpy, scrnum);
 470       const char *glVendor = (const char *) glGetString(GL_VENDOR);
 471       const char *glRenderer = (const char *) glGetString(GL_RENDERER);
 472       const char *glVersion = (const char *) glGetString(GL_VERSION);
 473       const char *glExtensions = (const char *) glGetString(GL_EXTENSIONS);
 474       int glxVersionMajor;
 475       int glxVersionMinor;
 476       char *displayName = NULL;
 477       char *colon = NULL, *period = NULL;
 478
 479       if (! glXQueryVersion( dpy, & glxVersionMajor, & glxVersionMinor )) {
 480          fprintf(stderr, "Error: glXQueryVersion failed\n");
 481          exit(1);
 482       }
 483
 484       /* Strip the screen number from the display name, if present. */
 485       if (!(displayName = (char *) malloc(strlen(DisplayString(dpy)) + 1))) {
 486          fprintf(stderr, "Error: malloc() failed\n");
 487          exit(1);
 488       }
 489       strcpy(displayName, DisplayString(dpy));
 490       colon = strrchr(displayName, ':');
 491       if (colon) {
 492          period = strchr(colon, '.');
 493          if (period)
 494             *period = '\0';
 495       }
 496       printf("display: %s  screen: %d\n", displayName, scrnum);
 497       free(displayName);
 498       printf("direct rendering: ");
 499       if (glXIsDirect(dpy, ctx)) {
 500          printf("Yes\n");
 501       } else {
 502          if (!allowDirect) {
 503             printf("No (-i specified)\n");
 504          } else if (getenv("LIBGL_ALWAYS_INDIRECT")) {
 505             printf("No (LIBGL_ALWAYS_INDIRECT set)\n");
 506          } else {
 507             printf("No (If you want to find out why, try setting "
 508                    "LIBGL_DEBUG=verbose)\n");
 509          }
 510       }
 511       printf("server glx vendor string: %s\n", serverVendor);
 512       printf("server glx version string: %s\n", serverVersion);
 513       printf("server glx extensions:\n");
 514       print_extension_list(serverExtensions);
 515       printf("client glx vendor string: %s\n", clientVendor);
 516       printf("client glx version string: %s\n", clientVersion);
 517       printf("client glx extensions:\n");
 518       print_extension_list(clientExtensions);
 519       printf("GLX version: %u.%u\n", glxVersionMajor, glxVersionMinor);
 520       printf("GLX extensions:\n");
 521       print_extension_list(glxExtensions);
 522       printf("OpenGL vendor string: %s\n", glVendor);
 523       printf("OpenGL renderer string: %s\n", glRenderer);
 524       printf("OpenGL version string: %s\n", glVersion);
 525 #ifdef GL_VERSION_2_0
 526       if (glVersion[0] >= '2' && glVersion[1] == '.') {
 527          char *v = (char *) glGetString(GL_SHADING_LANGUAGE_VERSION);
 528          printf("OpenGL shading language version string: %s\n", v);
 529       }
 530 #endif
 531
 532       printf("OpenGL extensions:\n");
 533       print_extension_list(glExtensions);
 534       if (limits)
 535          print_limits(glExtensions);
 536    }
 537    else {
 538       fprintf(stderr, "Error: glXMakeCurrent failed\n");
 539    }
 540
 541    glXDestroyContext(dpy, ctx);
 542    XFree(visinfo);
 543    XDestroyWindow(dpy, win);
 544 }
 545
 546
 547 static const char *
 548 visual_class_name(int cls)
 549 {
 550    switch (cls) {
 551       case StaticColor:
 552          return "StaticColor";
 553       case PseudoColor:
 554          return "PseudoColor";
 555       case StaticGray:
 556          return "StaticGray";
 557       case GrayScale:
 558          return "GrayScale";
 559       case TrueColor:
 560          return "TrueColor";
 561       case DirectColor:
 562          return "DirectColor";
 563       default:
 564          return "";
 565    }
 566 }
 567
 568
 569 static const char *
 570 visual_class_abbrev(int cls)
 571 {
 572    switch (cls) {
 573       case StaticColor:
 574          return "sc";
 575       case PseudoColor:
 576          return "pc";
 577       case StaticGray:
 578          return "sg";
 579       case GrayScale:
 580          return "gs";
 581       case TrueColor:
 582          return "tc";
 583       case DirectColor:
 584          return "dc";
 585       default:
 586          return "";
 587    }
 588 }
 589
 590 static const char *
 591 visual_render_type_name(int type)
 592 {
 593    switch (type) {
 594       case GLX_RGBA_BIT:
 595          return "rgba";
 596       case GLX_COLOR_INDEX_BIT:
 597          return "ci";
 598       case GLX_RGBA_BIT | GLX_COLOR_INDEX_BIT:
 599          return "rgba|ci";
 600       default:
 601          return "";
 602       }
 603 }
 604
 605 static GLboolean
 606 get_visual_attribs(Display *dpy, XVisualInfo *vInfo,
 607                    struct visual_attribs *attribs)
 608 {
 609    const char *ext = glXQueryExtensionsString(dpy, vInfo->screen);
 610    int rgba;
 611
 612    memset(attribs, 0, sizeof(struct visual_attribs));
 613
 614    attribs->id = vInfo->visualid;
 615 #if defined(__cplusplus) || defined(c_plusplus)
 616    attribs->klass = vInfo->c_class;
 617 #else
 618    attribs->klass = vInfo->class;
 619 #endif
 620    attribs->depth = vInfo->depth;
 621    attribs->redMask = vInfo->red_mask;
 622    attribs->greenMask = vInfo->green_mask;
 623    attribs->blueMask = vInfo->blue_mask;
 624    attribs->colormapSize = vInfo->colormap_size;
 625    attribs->bitsPerRGB = vInfo->bits_per_rgb;
 626
 627    if (glXGetConfig(dpy, vInfo, GLX_USE_GL, &attribs->supportsGL) != 0 ||
 628        !attribs->supportsGL)
 629       return GL_FALSE;
 630    glXGetConfig(dpy, vInfo, GLX_BUFFER_SIZE, &attribs->bufferSize);
 631    glXGetConfig(dpy, vInfo, GLX_LEVEL, &attribs->level);
 632    glXGetConfig(dpy, vInfo, GLX_RGBA, &rgba);
 633    if (rgba)
 634       attribs->render_type = GLX_RGBA_BIT;
 635    else
 636       attribs->render_type = GLX_COLOR_INDEX_BIT;
 637
 638    glXGetConfig(dpy, vInfo, GLX_DOUBLEBUFFER, &attribs->doubleBuffer);
 639    glXGetConfig(dpy, vInfo, GLX_STEREO, &attribs->stereo);
 640    glXGetConfig(dpy, vInfo, GLX_AUX_BUFFERS, &attribs->auxBuffers);
 641    glXGetConfig(dpy, vInfo, GLX_RED_SIZE, &attribs->redSize);
 642    glXGetConfig(dpy, vInfo, GLX_GREEN_SIZE, &attribs->greenSize);
 643    glXGetConfig(dpy, vInfo, GLX_BLUE_SIZE, &attribs->blueSize);
 644    glXGetConfig(dpy, vInfo, GLX_ALPHA_SIZE, &attribs->alphaSize);
 645    glXGetConfig(dpy, vInfo, GLX_DEPTH_SIZE, &attribs->depthSize);
 646    glXGetConfig(dpy, vInfo, GLX_STENCIL_SIZE, &attribs->stencilSize);
 647    glXGetConfig(dpy, vInfo, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize);
 648    glXGetConfig(dpy, vInfo, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize);
 649    glXGetConfig(dpy, vInfo, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize);
 650    glXGetConfig(dpy, vInfo, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize);
 651
 652    /* get transparent pixel stuff */
 653    glXGetConfig(dpy, vInfo,GLX_TRANSPARENT_TYPE, &attribs->transparentType);
 654    if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
 655      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue);
 656      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue);
 657      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue);
 658      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue);
 659    }
 660    else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
 661      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue);
 662    }
 663
 664    /* multisample attribs */
 665 #ifdef GLX_ARB_multisample
 666    if (ext && strstr(ext, "GLX_ARB_multisample")) {
 667       glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample);
 668       glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples);
 669    }
 670 #endif
 671    else {
 672       attribs->numSamples = 0;
 673       attribs->numMultisample = 0;
 674    }
 675
 676 #if defined(GLX_EXT_visual_rating)
 677    if (ext && strstr(ext, "GLX_EXT_visual_rating")) {
 678       glXGetConfig(dpy, vInfo, GLX_VISUAL_CAVEAT_EXT, &attribs->visualCaveat);
 679    }
 680    else {
 681       attribs->visualCaveat = GLX_NONE_EXT;
 682    }
 683 #else
 684    attribs->visualCaveat = 0;
 685 #endif
 686
 687    return GL_TRUE;
 688 }
 689
 690 #ifdef GLX_VERSION_1_3
 691
 692 static int
 693 glx_token_to_visual_class(int visual_type)
 694 {
 695    switch (visual_type) {
 696    case GLX_TRUE_COLOR:
 697       return TrueColor;
 698    case GLX_DIRECT_COLOR:
 699       return DirectColor;
 700    case GLX_PSEUDO_COLOR:
 701       return PseudoColor;
 702    case GLX_STATIC_COLOR:
 703       return StaticColor;
 704    case GLX_GRAY_SCALE:
 705       return GrayScale;
 706    case GLX_STATIC_GRAY:
 707       return StaticGray;
 708    case GLX_NONE:
 709    default:
 710       return None;
 711    }
 712 }
 713
 714 static GLboolean
 715 get_fbconfig_attribs(Display *dpy, GLXFBConfig fbconfig,
 716                      struct visual_attribs *attribs)
 717 {
 718    int visual_type;
 719
 720    memset(attribs, 0, sizeof(struct visual_attribs));
 721
 722    glXGetFBConfigAttrib(dpy, fbconfig, GLX_FBCONFIG_ID, &attribs->id);
 723
 724 #if 0
 725    attribs->depth = vInfo->depth;
 726    attribs->redMask = vInfo->red_mask;
 727    attribs->greenMask = vInfo->green_mask;
 728    attribs->blueMask = vInfo->blue_mask;
 729    attribs->colormapSize = vInfo->colormap_size;
 730    attribs->bitsPerRGB = vInfo->bits_per_rgb;
 731 #endif
 732
 733    glXGetFBConfigAttrib(dpy, fbconfig, GLX_X_VISUAL_TYPE, &visual_type);
 734    attribs->klass = glx_token_to_visual_class(visual_type);
 735
 736    glXGetFBConfigAttrib(dpy, fbconfig, GLX_BUFFER_SIZE, &attribs->bufferSize);
 737    glXGetFBConfigAttrib(dpy, fbconfig, GLX_LEVEL, &attribs->level);
 738    glXGetFBConfigAttrib(dpy, fbconfig, GLX_RENDER_TYPE, &attribs->render_type);
 739    glXGetFBConfigAttrib(dpy, fbconfig, GLX_DOUBLEBUFFER, &attribs->doubleBuffer);
 740    glXGetFBConfigAttrib(dpy, fbconfig, GLX_STEREO, &attribs->stereo);
 741    glXGetFBConfigAttrib(dpy, fbconfig, GLX_AUX_BUFFERS, &attribs->auxBuffers);
 742
 743    glXGetFBConfigAttrib(dpy, fbconfig, GLX_RED_SIZE, &attribs->redSize);
 744    glXGetFBConfigAttrib(dpy, fbconfig, GLX_GREEN_SIZE, &attribs->greenSize);
 745    glXGetFBConfigAttrib(dpy, fbconfig, GLX_BLUE_SIZE, &attribs->blueSize);
 746    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ALPHA_SIZE, &attribs->alphaSize);
 747    glXGetFBConfigAttrib(dpy, fbconfig, GLX_DEPTH_SIZE, &attribs->depthSize);
 748    glXGetFBConfigAttrib(dpy, fbconfig, GLX_STENCIL_SIZE, &attribs->stencilSize);
 749
 750    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize);
 751    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize);
 752    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize);
 753    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize);
 754
 755    /* get transparent pixel stuff */
 756    glXGetFBConfigAttrib(dpy, fbconfig,GLX_TRANSPARENT_TYPE, &attribs->transparentType);
 757    if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
 758      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue);
 759      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue);
 760      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue);
 761      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue);
 762    }
 763    else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
 764      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue);
 765    }
 766
 767    glXGetFBConfigAttrib(dpy, fbconfig, GLX_SAMPLE_BUFFERS, &attribs->numMultisample);
 768    glXGetFBConfigAttrib(dpy, fbconfig, GLX_SAMPLES, &attribs->numSamples);
 769    glXGetFBConfigAttrib(dpy, fbconfig, GLX_CONFIG_CAVEAT, &attribs->visualCaveat);
 770
 771    return GL_TRUE;
 772 }
 773
 774 #endif
 775
 776
 777
 778 static void
 779 print_visual_attribs_verbose(const struct visual_attribs *attribs)
 780 {
 781    printf("Visual ID: %x  depth=%d  class=%s\n",
 782           attribs->id, attribs->depth, visual_class_name(attribs->klass));
 783    printf("    bufferSize=%d level=%d renderType=%s doubleBuffer=%d stereo=%d\n",
 784           attribs->bufferSize, attribs->level,
 785           visual_render_type_name(attribs->render_type),
 786           attribs->doubleBuffer, attribs->stereo);
 787    printf("    rgba: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
 788           attribs->redSize, attribs->greenSize,
 789           attribs->blueSize, attribs->alphaSize);
 790    printf("    auxBuffers=%d depthSize=%d stencilSize=%d\n",
 791           attribs->auxBuffers, attribs->depthSize, attribs->stencilSize);
 792    printf("    accum: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
 793           attribs->accumRedSize, attribs->accumGreenSize,
 794           attribs->accumBlueSize, attribs->accumAlphaSize);
 795    printf("    multiSample=%d  multiSampleBuffers=%d\n",
 796           attribs->numSamples, attribs->numMultisample);
 797 #ifdef GLX_EXT_visual_rating
 798    if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
 799       printf("    visualCaveat=None\n");
 800    else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
 801       printf("    visualCaveat=Slow\n");
 802    else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
 803       printf("    visualCaveat=Nonconformant\n");
 804 #endif
 805    if (attribs->transparentType == GLX_NONE) {
 806      printf("    Opaque.\n");
 807    }
 808    else if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
 809      printf("    Transparent RGB: Red=%d Green=%d Blue=%d Alpha=%d\n",attribs->transparentRedValue,attribs->transparentGreenValue,attribs->transparentBlueValue,attribs->transparentAlphaValue);
 810    }
 811    else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
 812      printf("    Transparent index=%d\n",attribs->transparentIndexValue);
 813    }
 814 }
 815
 816
 817 static void
 818 print_visual_attribs_short_header(void)
 819 {
 820  printf("   visual  x  bf lv rg d st colorbuffer ax dp st accumbuffer  ms  cav\n");
 821  printf(" id dep cl sp sz l  ci b ro  r  g  b  a bf th cl  r  g  b  a ns b eat\n");
 822  printf("----------------------------------------------------------------------\n");
 823 }
 824
 825
 826 static void
 827 print_visual_attribs_short(const struct visual_attribs *attribs)
 828 {
 829    char *caveat = NULL;
 830 #ifdef GLX_EXT_visual_rating
 831    if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
 832       caveat = "None";
 833    else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
 834       caveat = "Slow";
 835    else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
 836       caveat = "Ncon";
 837    else
 838       caveat = "None";
 839 #else
 840    caveat = "None";
 841 #endif
 842
 843    printf("0x%02x %2d %2s %2d %2d %2d %c%c %c  %c %2d %2d %2d %2d %2d %2d %2d",
 844           attribs->id,
 845           attribs->depth,
 846           visual_class_abbrev(attribs->klass),
 847           attribs->transparentType != GLX_NONE,
 848           attribs->bufferSize,
 849           attribs->level,
 850           (attribs->render_type & GLX_RGBA_BIT) ? 'r' : ' ',
 851           (attribs->render_type & GLX_COLOR_INDEX_BIT) ? 'c' : ' ',
 852           attribs->doubleBuffer ? 'y' : '.',
 853           attribs->stereo ? 'y' : '.',
 854           attribs->redSize, attribs->greenSize,
 855           attribs->blueSize, attribs->alphaSize,
 856           attribs->auxBuffers,
 857           attribs->depthSize,
 858           attribs->stencilSize
 859           );
 860
 861    printf(" %2d %2d %2d %2d %2d %1d %s\n",
 862           attribs->accumRedSize, attribs->accumGreenSize,
 863           attribs->accumBlueSize, attribs->accumAlphaSize,
 864           attribs->numSamples, attribs->numMultisample,
 865           caveat
 866           );
 867 }
 868
 869
 870 static void
 871 print_visual_attribs_long_header(void)
 872 {
 873  printf("Vis  Vis   Visual Trans  buff lev render DB ste  r   g   b   a  aux dep ste  accum buffers  MS   MS\n");
 874  printf(" ID Depth   Type  parent size el   type     reo sz  sz  sz  sz  buf th  ncl  r   g   b   a  num bufs\n");
 875  printf("----------------------------------------------------------------------------------------------------\n");
 876 }
 877
 878
 879 static void
 880 print_visual_attribs_long(const struct visual_attribs *attribs)
 881 {
 882    printf("0x%2x %2d %-11s %2d     %2d %2d  %4s %3d %3d %3d %3d %3d %3d",
 883           attribs->id,
 884           attribs->depth,
 885           visual_class_name(attribs->klass),
 886           attribs->transparentType != GLX_NONE,
 887           attribs->bufferSize,
 888           attribs->level,
 889           visual_render_type_name(attribs->render_type),
 890           attribs->doubleBuffer,
 891           attribs->stereo,
 892           attribs->redSize, attribs->greenSize,
 893           attribs->blueSize, attribs->alphaSize
 894           );
 895
 896    printf(" %3d %4d %2d %3d %3d %3d %3d  %2d  %2d\n",
 897           attribs->auxBuffers,
 898           attribs->depthSize,
 899           attribs->stencilSize,
 900           attribs->accumRedSize, attribs->accumGreenSize,
 901           attribs->accumBlueSize, attribs->accumAlphaSize,
 902           attribs->numSamples, attribs->numMultisample
 903           );
 904 }
 905
 906
 907 static void
 908 print_visual_info(Display *dpy, int scrnum, InfoMode mode)
 909 {
 910    XVisualInfo theTemplate;
 911    XVisualInfo *visuals;
 912    int numVisuals, numGlxVisuals;
 913    long mask;
 914    int i;
 915    struct visual_attribs attribs;
 916
 917    /* get list of all visuals on this screen */
 918    theTemplate.screen = scrnum;
 919    mask = VisualScreenMask;
 920    visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
 921
 922    numGlxVisuals = 0;
 923    for (i = 0; i < numVisuals; i++) {
 924       if (get_visual_attribs(dpy, &visuals[i], &attribs))
 925          numGlxVisuals++;
 926    }
 927
 928    if (numGlxVisuals == 0)
 929       return;
 930
 931    printf("%d GLX Visuals\n", numGlxVisuals);
 932
 933    if (mode == Normal)
 934       print_visual_attribs_short_header();
 935    else if (mode == Wide)
 936       print_visual_attribs_long_header();
 937
 938    for (i = 0; i < numVisuals; i++) {
 939       if (!get_visual_attribs(dpy, &visuals[i], &attribs))
 940          continue;
 941
 942       if (mode == Verbose)
 943          print_visual_attribs_verbose(&attribs);
 944       else if (mode == Normal)
 945          print_visual_attribs_short(&attribs);
 946       else if (mode == Wide)
 947          print_visual_attribs_long(&attribs);
 948    }
 949    printf("\n");
 950
 951    XFree(visuals);
 952 }
 953
 954 #ifdef GLX_VERSION_1_3
 955
 956 static void
 957 print_fbconfig_info(Display *dpy, int scrnum, InfoMode mode)
 958 {
 959    int numFBConfigs;
 960    struct visual_attribs attribs;
 961    GLXFBConfig *fbconfigs;
 962    int i;
 963
 964    /* get list of all fbconfigs on this screen */
 965    fbconfigs = glXGetFBConfigs(dpy, scrnum, &numFBConfigs);
 966
 967    if (numFBConfigs == 0)
 968       return;
 969
 970    printf("%d GLXFBConfigs:\n", numFBConfigs);
 971    if (mode == Normal)
 972       print_visual_attribs_short_header();
 973    else if (mode == Wide)
 974       print_visual_attribs_long_header();
 975
 976    for (i = 0; i < numFBConfigs; i++) {
 977       get_fbconfig_attribs(dpy, fbconfigs[i], &attribs);
 978
 979       if (mode == Verbose)
 980          print_visual_attribs_verbose(&attribs);
 981       else if (mode == Normal)
 982          print_visual_attribs_short(&attribs);
 983       else if (mode == Wide)
 984          print_visual_attribs_long(&attribs);
 985    }
 986    printf("\n");
 987
 988    XFree(fbconfigs);
 989 }
 990
 991 #endif
 992
 993 /*
 994  * Stand-alone Mesa doesn't really implement the GLX protocol so it
 995  * doesn't really know the GLX attributes associated with an X visual.
 996  * The first time a visual is presented to Mesa's pseudo-GLX it
 997  * attaches ancilliary buffers to it (like depth and stencil).
 998  * But that usually only works if glXChooseVisual is used.
 999  * This function calls glXChooseVisual() to sort of "prime the pump"
1000  * for Mesa's GLX so that the visuals that get reported actually
1001  * reflect what applications will see.
1002  * This has no effect when using true GLX.
1003  */
1004 static void
1005 mesa_hack(Display *dpy, int scrnum)
1006 {
1007    static int attribs[] = {
1008       GLX_RGBA,
1009       GLX_RED_SIZE, 1,
1010       GLX_GREEN_SIZE, 1,
1011       GLX_BLUE_SIZE, 1,
1012       GLX_DEPTH_SIZE, 1,
1013       GLX_STENCIL_SIZE, 1,
1014       GLX_ACCUM_RED_SIZE, 1,
1015       GLX_ACCUM_GREEN_SIZE, 1,
1016       GLX_ACCUM_BLUE_SIZE, 1,
1017       GLX_ACCUM_ALPHA_SIZE, 1,
1018       GLX_DOUBLEBUFFER,
1019       None
1020    };
1021    XVisualInfo *visinfo;
1022
1023    visinfo = glXChooseVisual(dpy, scrnum, attribs);
1024    if (visinfo)
1025       XFree(visinfo);
1026 }
1027
1028
1029 /*
1030  * Examine all visuals to find the so-called best one.
1031  * We prefer deepest RGBA buffer with depth, stencil and accum
1032  * that has no caveats.
1033  */
1034 static int
1035 find_best_visual(Display *dpy, int scrnum)
1036 {
1037    XVisualInfo theTemplate;
1038    XVisualInfo *visuals;
1039    int numVisuals;
1040    long mask;
1041    int i;
1042    struct visual_attribs bestVis;
1043
1044    /* get list of all visuals on this screen */
1045    theTemplate.screen = scrnum;
1046    mask = VisualScreenMask;
1047    visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
1048
1049    /* init bestVis with first visual info */
1050    get_visual_attribs(dpy, &visuals[0], &bestVis);
1051
1052    /* try to find a "better" visual */
1053    for (i = 1; i < numVisuals; i++) {
1054       struct visual_attribs vis;
1055
1056       get_visual_attribs(dpy, &visuals[i], &vis);
1057
1058       /* always skip visuals with caveats */
1059       if (vis.visualCaveat != GLX_NONE_EXT)
1060          continue;
1061
1062       /* see if this vis is better than bestVis */
1063       if ((!bestVis.supportsGL && vis.supportsGL) ||
1064           (bestVis.visualCaveat != GLX_NONE_EXT) ||
1065           (!(bestVis.render_type & GLX_RGBA_BIT) && (vis.render_type & GLX_RGBA_BIT)) ||
1066           (!bestVis.doubleBuffer && vis.doubleBuffer) ||
1067           (bestVis.redSize < vis.redSize) ||
1068           (bestVis.greenSize < vis.greenSize) ||
1069           (bestVis.blueSize < vis.blueSize) ||
1070           (bestVis.alphaSize < vis.alphaSize) ||
1071           (bestVis.depthSize < vis.depthSize) ||
1072           (bestVis.stencilSize < vis.stencilSize) ||
1073           (bestVis.accumRedSize < vis.accumRedSize)) {
1074          /* found a better visual */
1075          bestVis = vis;
1076       }
1077    }
1078
1079    XFree(visuals);
1080
1081    return bestVis.id;
1082 }
1083
1084
1085 static void
1086 usage(void)
1087 {
1088    printf("Usage: glxinfo [-v] [-t] [-h] [-i] [-b] [-display <dname>]\n");
1089    printf("\t-v: Print visuals info in verbose form.\n");
1090    printf("\t-t: Print verbose table.\n");
1091    printf("\t-display <dname>: Print GLX visuals on specified server.\n");
1092    printf("\t-h: This information.\n");
1093    printf("\t-i: Force an indirect rendering context.\n");
1094    printf("\t-b: Find the 'best' visual and print it's number.\n");
1095    printf("\t-l: Print interesting OpenGL limits.\n");
1096 }
1097
1098
1099 int
1100 main(int argc, char *argv[])
1101 {
1102    char *displayName = NULL;
1103    Display *dpy;
1104    int numScreens, scrnum;
1105    InfoMode mode = Normal;
1106    GLboolean findBest = GL_FALSE;
1107    GLboolean limits = GL_FALSE;
1108    Bool allowDirect = True;
1109    int i;
1110
1111    for (i = 1; i < argc; i++) {
1112       if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
1113          displayName = argv[i + 1];
1114          i++;
1115       }
1116       else if (strcmp(argv[i], "-t") == 0) {
1117          mode = Wide;
1118       }
1119       else if (strcmp(argv[i], "-v") == 0) {
1120          mode = Verbose;
1121       }
1122       else if (strcmp(argv[i], "-b") == 0) {
1123          findBest = GL_TRUE;
1124       }
1125       else if (strcmp(argv[i], "-i") == 0) {
1126          allowDirect = False;
1127       }
1128       else if (strcmp(argv[i], "-l") == 0) {
1129          limits = GL_TRUE;
1130       }
1131       else if (strcmp(argv[i], "-h") == 0) {
1132          usage();
1133          return 0;
1134       }
1135       else {
1136          printf("Unknown option `%s'\n", argv[i]);
1137          usage();
1138          return 0;
1139       }
1140    }
1141
1142    dpy = XOpenDisplay(displayName);
1143    if (!dpy) {
1144       fprintf(stderr, "Error: unable to open display %s\n", XDisplayName(displayName));
1145       return -1;
1146    }
1147
1148    if (findBest) {
1149       int b;
1150       mesa_hack(dpy, 0);
1151       b = find_best_visual(dpy, 0);
1152       printf("%d\n", b);
1153    }
1154    else {
1155       numScreens = ScreenCount(dpy);
1156       print_display_info(dpy);
1157       for (scrnum = 0; scrnum < numScreens; scrnum++) {
1158          mesa_hack(dpy, scrnum);
1159          print_screen_info(dpy, scrnum, allowDirect, limits);
1160          printf("\n");
1161          print_visual_info(dpy, scrnum, mode);
1162 #ifdef GLX_VERSION_1_3
1163          print_fbconfig_info(dpy, scrnum, mode);
1164 #endif
1165          if (scrnum + 1 < numScreens)
1166             printf("\n\n");
1167       }
1168    }
1169
1170    XCloseDisplay(dpy);
1171
1172    return 0;
1173 }