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       XDestroyWindow(dpy, win);
 451       return;
 452    }
 453
 454    attr.background_pixel = 0;
 455    attr.border_pixel = 0;
 456    attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
 457    attr.event_mask = StructureNotifyMask | ExposureMask;
 458    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 459    win = XCreateWindow(dpy, root, 0, 0, width, height,
 460                        0, visinfo->depth, InputOutput,
 461                        visinfo->visual, mask, &attr);
 462
 463    if (glXMakeCurrent(dpy, win, ctx)) {
 464       const char *serverVendor = glXQueryServerString(dpy, scrnum, GLX_VENDOR);
 465       const char *serverVersion = glXQueryServerString(dpy, scrnum, GLX_VERSION);
 466       const char *serverExtensions = glXQueryServerString(dpy, scrnum, GLX_EXTENSIONS);
 467       const char *clientVendor = glXGetClientString(dpy, GLX_VENDOR);
 468       const char *clientVersion = glXGetClientString(dpy, GLX_VERSION);
 469       const char *clientExtensions = glXGetClientString(dpy, GLX_EXTENSIONS);
 470       const char *glxExtensions = glXQueryExtensionsString(dpy, scrnum);
 471       const char *glVendor = (const char *) glGetString(GL_VENDOR);
 472       const char *glRenderer = (const char *) glGetString(GL_RENDERER);
 473       const char *glVersion = (const char *) glGetString(GL_VERSION);
 474       const char *glExtensions = (const char *) glGetString(GL_EXTENSIONS);
 475       int glxVersionMajor;
 476       int glxVersionMinor;
 477       char *displayName = NULL;
 478       char *colon = NULL, *period = NULL;
 479
 480       if (! glXQueryVersion( dpy, & glxVersionMajor, & glxVersionMinor )) {
 481          fprintf(stderr, "Error: glXQueryVersion failed\n");
 482          exit(1);
 483       }
 484
 485       /* Strip the screen number from the display name, if present. */
 486       if (!(displayName = (char *) malloc(strlen(DisplayString(dpy)) + 1))) {
 487          fprintf(stderr, "Error: malloc() failed\n");
 488          exit(1);
 489       }
 490       strcpy(displayName, DisplayString(dpy));
 491       colon = strrchr(displayName, ':');
 492       if (colon) {
 493          period = strchr(colon, '.');
 494          if (period)
 495             *period = '\0';
 496       }
 497       printf("display: %s  screen: %d\n", displayName, scrnum);
 498       free(displayName);
 499       printf("direct rendering: ");
 500       if (glXIsDirect(dpy, ctx)) {
 501          printf("Yes\n");
 502       } else {
 503          if (!allowDirect) {
 504             printf("No (-i specified)\n");
 505          } else if (getenv("LIBGL_ALWAYS_INDIRECT")) {
 506             printf("No (LIBGL_ALWAYS_INDIRECT set)\n");
 507          } else {
 508             printf("No (If you want to find out why, try setting "
 509                    "LIBGL_DEBUG=verbose)\n");
 510          }
 511       }
 512       printf("server glx vendor string: %s\n", serverVendor);
 513       printf("server glx version string: %s\n", serverVersion);
 514       printf("server glx extensions:\n");
 515       print_extension_list(serverExtensions);
 516       printf("client glx vendor string: %s\n", clientVendor);
 517       printf("client glx version string: %s\n", clientVersion);
 518       printf("client glx extensions:\n");
 519       print_extension_list(clientExtensions);
 520       printf("GLX version: %u.%u\n", glxVersionMajor, glxVersionMinor);
 521       printf("GLX extensions:\n");
 522       print_extension_list(glxExtensions);
 523       printf("OpenGL vendor string: %s\n", glVendor);
 524       printf("OpenGL renderer string: %s\n", glRenderer);
 525       printf("OpenGL version string: %s\n", glVersion);
 526 #ifdef GL_VERSION_2_0
 527       if (glVersion[0] >= '2' && glVersion[1] == '.') {
 528          char *v = (char *) glGetString(GL_SHADING_LANGUAGE_VERSION);
 529          printf("OpenGL shading language version string: %s\n", v);
 530       }
 531 #endif
 532
 533       printf("OpenGL extensions:\n");
 534       print_extension_list(glExtensions);
 535       if (limits)
 536          print_limits(glExtensions);
 537    }
 538    else {
 539       fprintf(stderr, "Error: glXMakeCurrent failed\n");
 540    }
 541
 542    glXDestroyContext(dpy, ctx);
 543    XFree(visinfo);
 544    XDestroyWindow(dpy, win);
 545 }
 546
 547
 548 static const char *
 549 visual_class_name(int cls)
 550 {
 551    switch (cls) {
 552       case StaticColor:
 553          return "StaticColor";
 554       case PseudoColor:
 555          return "PseudoColor";
 556       case StaticGray:
 557          return "StaticGray";
 558       case GrayScale:
 559          return "GrayScale";
 560       case TrueColor:
 561          return "TrueColor";
 562       case DirectColor:
 563          return "DirectColor";
 564       default:
 565          return "";
 566    }
 567 }
 568
 569
 570 static const char *
 571 visual_class_abbrev(int cls)
 572 {
 573    switch (cls) {
 574       case StaticColor:
 575          return "sc";
 576       case PseudoColor:
 577          return "pc";
 578       case StaticGray:
 579          return "sg";
 580       case GrayScale:
 581          return "gs";
 582       case TrueColor:
 583          return "tc";
 584       case DirectColor:
 585          return "dc";
 586       default:
 587          return "";
 588    }
 589 }
 590
 591 static const char *
 592 visual_render_type_name(int type)
 593 {
 594    switch (type) {
 595       case GLX_RGBA_BIT:
 596          return "rgba";
 597       case GLX_COLOR_INDEX_BIT:
 598          return "ci";
 599       case GLX_RGBA_BIT | GLX_COLOR_INDEX_BIT:
 600          return "rgba|ci";
 601       default:
 602          return "";
 603       }
 604 }
 605
 606 static GLboolean
 607 get_visual_attribs(Display *dpy, XVisualInfo *vInfo,
 608                    struct visual_attribs *attribs)
 609 {
 610    const char *ext = glXQueryExtensionsString(dpy, vInfo->screen);
 611    int rgba;
 612
 613    memset(attribs, 0, sizeof(struct visual_attribs));
 614
 615    attribs->id = vInfo->visualid;
 616 #if defined(__cplusplus) || defined(c_plusplus)
 617    attribs->klass = vInfo->c_class;
 618 #else
 619    attribs->klass = vInfo->class;
 620 #endif
 621    attribs->depth = vInfo->depth;
 622    attribs->redMask = vInfo->red_mask;
 623    attribs->greenMask = vInfo->green_mask;
 624    attribs->blueMask = vInfo->blue_mask;
 625    attribs->colormapSize = vInfo->colormap_size;
 626    attribs->bitsPerRGB = vInfo->bits_per_rgb;
 627
 628    if (glXGetConfig(dpy, vInfo, GLX_USE_GL, &attribs->supportsGL) != 0 ||
 629        !attribs->supportsGL)
 630       return GL_FALSE;
 631    glXGetConfig(dpy, vInfo, GLX_BUFFER_SIZE, &attribs->bufferSize);
 632    glXGetConfig(dpy, vInfo, GLX_LEVEL, &attribs->level);
 633    glXGetConfig(dpy, vInfo, GLX_RGBA, &rgba);
 634    if (rgba)
 635       attribs->render_type = GLX_RGBA_BIT;
 636    else
 637       attribs->render_type = GLX_COLOR_INDEX_BIT;
 638
 639    glXGetConfig(dpy, vInfo, GLX_DOUBLEBUFFER, &attribs->doubleBuffer);
 640    glXGetConfig(dpy, vInfo, GLX_STEREO, &attribs->stereo);
 641    glXGetConfig(dpy, vInfo, GLX_AUX_BUFFERS, &attribs->auxBuffers);
 642    glXGetConfig(dpy, vInfo, GLX_RED_SIZE, &attribs->redSize);
 643    glXGetConfig(dpy, vInfo, GLX_GREEN_SIZE, &attribs->greenSize);
 644    glXGetConfig(dpy, vInfo, GLX_BLUE_SIZE, &attribs->blueSize);
 645    glXGetConfig(dpy, vInfo, GLX_ALPHA_SIZE, &attribs->alphaSize);
 646    glXGetConfig(dpy, vInfo, GLX_DEPTH_SIZE, &attribs->depthSize);
 647    glXGetConfig(dpy, vInfo, GLX_STENCIL_SIZE, &attribs->stencilSize);
 648    glXGetConfig(dpy, vInfo, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize);
 649    glXGetConfig(dpy, vInfo, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize);
 650    glXGetConfig(dpy, vInfo, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize);
 651    glXGetConfig(dpy, vInfo, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize);
 652
 653    /* get transparent pixel stuff */
 654    glXGetConfig(dpy, vInfo,GLX_TRANSPARENT_TYPE, &attribs->transparentType);
 655    if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
 656      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue);
 657      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue);
 658      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue);
 659      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue);
 660    }
 661    else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
 662      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue);
 663    }
 664
 665    /* multisample attribs */
 666 #ifdef GLX_ARB_multisample
 667    if (ext && strstr(ext, "GLX_ARB_multisample")) {
 668       glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample);
 669       glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples);
 670    }
 671 #endif
 672    else {
 673       attribs->numSamples = 0;
 674       attribs->numMultisample = 0;
 675    }
 676
 677 #if defined(GLX_EXT_visual_rating)
 678    if (ext && strstr(ext, "GLX_EXT_visual_rating")) {
 679       glXGetConfig(dpy, vInfo, GLX_VISUAL_CAVEAT_EXT, &attribs->visualCaveat);
 680    }
 681    else {
 682       attribs->visualCaveat = GLX_NONE_EXT;
 683    }
 684 #else
 685    attribs->visualCaveat = 0;
 686 #endif
 687
 688    return GL_TRUE;
 689 }
 690
 691 #ifdef GLX_VERSION_1_3
 692
 693 static int
 694 glx_token_to_visual_class(int visual_type)
 695 {
 696    switch (visual_type) {
 697    case GLX_TRUE_COLOR:
 698       return TrueColor;
 699    case GLX_DIRECT_COLOR:
 700       return DirectColor;
 701    case GLX_PSEUDO_COLOR:
 702       return PseudoColor;
 703    case GLX_STATIC_COLOR:
 704       return StaticColor;
 705    case GLX_GRAY_SCALE:
 706       return GrayScale;
 707    case GLX_STATIC_GRAY:
 708       return StaticGray;
 709    case GLX_NONE:
 710    default:
 711       return None;
 712    }
 713 }
 714
 715 static GLboolean
 716 get_fbconfig_attribs(Display *dpy, GLXFBConfig fbconfig,
 717                      struct visual_attribs *attribs)
 718 {
 719    int visual_type;
 720
 721    memset(attribs, 0, sizeof(struct visual_attribs));
 722
 723    glXGetFBConfigAttrib(dpy, fbconfig, GLX_FBCONFIG_ID, &attribs->id);
 724
 725 #if 0
 726    attribs->depth = vInfo->depth;
 727    attribs->redMask = vInfo->red_mask;
 728    attribs->greenMask = vInfo->green_mask;
 729    attribs->blueMask = vInfo->blue_mask;
 730    attribs->colormapSize = vInfo->colormap_size;
 731    attribs->bitsPerRGB = vInfo->bits_per_rgb;
 732 #endif
 733
 734    glXGetFBConfigAttrib(dpy, fbconfig, GLX_X_VISUAL_TYPE, &visual_type);
 735    attribs->klass = glx_token_to_visual_class(visual_type);
 736
 737    glXGetFBConfigAttrib(dpy, fbconfig, GLX_BUFFER_SIZE, &attribs->bufferSize);
 738    glXGetFBConfigAttrib(dpy, fbconfig, GLX_LEVEL, &attribs->level);
 739    glXGetFBConfigAttrib(dpy, fbconfig, GLX_RENDER_TYPE, &attribs->render_type);
 740    glXGetFBConfigAttrib(dpy, fbconfig, GLX_DOUBLEBUFFER, &attribs->doubleBuffer);
 741    glXGetFBConfigAttrib(dpy, fbconfig, GLX_STEREO, &attribs->stereo);
 742    glXGetFBConfigAttrib(dpy, fbconfig, GLX_AUX_BUFFERS, &attribs->auxBuffers);
 743
 744    glXGetFBConfigAttrib(dpy, fbconfig, GLX_RED_SIZE, &attribs->redSize);
 745    glXGetFBConfigAttrib(dpy, fbconfig, GLX_GREEN_SIZE, &attribs->greenSize);
 746    glXGetFBConfigAttrib(dpy, fbconfig, GLX_BLUE_SIZE, &attribs->blueSize);
 747    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ALPHA_SIZE, &attribs->alphaSize);
 748    glXGetFBConfigAttrib(dpy, fbconfig, GLX_DEPTH_SIZE, &attribs->depthSize);
 749    glXGetFBConfigAttrib(dpy, fbconfig, GLX_STENCIL_SIZE, &attribs->stencilSize);
 750
 751    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize);
 752    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize);
 753    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize);
 754    glXGetFBConfigAttrib(dpy, fbconfig, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize);
 755
 756    /* get transparent pixel stuff */
 757    glXGetFBConfigAttrib(dpy, fbconfig,GLX_TRANSPARENT_TYPE, &attribs->transparentType);
 758    if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
 759      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue);
 760      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue);
 761      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue);
 762      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue);
 763    }
 764    else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
 765      glXGetFBConfigAttrib(dpy, fbconfig, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue);
 766    }
 767
 768    glXGetFBConfigAttrib(dpy, fbconfig, GLX_SAMPLE_BUFFERS, &attribs->numMultisample);
 769    glXGetFBConfigAttrib(dpy, fbconfig, GLX_SAMPLES, &attribs->numSamples);
 770    glXGetFBConfigAttrib(dpy, fbconfig, GLX_CONFIG_CAVEAT, &attribs->visualCaveat);
 771
 772    return GL_TRUE;
 773 }
 774
 775 #endif
 776
 777
 778
 779 static void
 780 print_visual_attribs_verbose(const struct visual_attribs *attribs)
 781 {
 782    printf("Visual ID: %x  depth=%d  class=%s\n",
 783           attribs->id, attribs->depth, visual_class_name(attribs->klass));
 784    printf("    bufferSize=%d level=%d renderType=%s doubleBuffer=%d stereo=%d\n",
 785           attribs->bufferSize, attribs->level,
 786           visual_render_type_name(attribs->render_type),
 787           attribs->doubleBuffer, attribs->stereo);
 788    printf("    rgba: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
 789           attribs->redSize, attribs->greenSize,
 790           attribs->blueSize, attribs->alphaSize);
 791    printf("    auxBuffers=%d depthSize=%d stencilSize=%d\n",
 792           attribs->auxBuffers, attribs->depthSize, attribs->stencilSize);
 793    printf("    accum: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
 794           attribs->accumRedSize, attribs->accumGreenSize,
 795           attribs->accumBlueSize, attribs->accumAlphaSize);
 796    printf("    multiSample=%d  multiSampleBuffers=%d\n",
 797           attribs->numSamples, attribs->numMultisample);
 798 #ifdef GLX_EXT_visual_rating
 799    if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
 800       printf("    visualCaveat=None\n");
 801    else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
 802       printf("    visualCaveat=Slow\n");
 803    else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
 804       printf("    visualCaveat=Nonconformant\n");
 805 #endif
 806    if (attribs->transparentType == GLX_NONE) {
 807      printf("    Opaque.\n");
 808    }
 809    else if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
 810      printf("    Transparent RGB: Red=%d Green=%d Blue=%d Alpha=%d\n",attribs->transparentRedValue,attribs->transparentGreenValue,attribs->transparentBlueValue,attribs->transparentAlphaValue);
 811    }
 812    else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
 813      printf("    Transparent index=%d\n",attribs->transparentIndexValue);
 814    }
 815 }
 816
 817
 818 static void
 819 print_visual_attribs_short_header(void)
 820 {
 821  printf("   visual  x  bf lv rg d st colorbuffer ax dp st accumbuffer  ms  cav\n");
 822  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");
 823  printf("----------------------------------------------------------------------\n");
 824 }
 825
 826
 827 static void
 828 print_visual_attribs_short(const struct visual_attribs *attribs)
 829 {
 830    char *caveat = NULL;
 831 #ifdef GLX_EXT_visual_rating
 832    if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
 833       caveat = "None";
 834    else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
 835       caveat = "Slow";
 836    else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
 837       caveat = "Ncon";
 838    else
 839       caveat = "None";
 840 #else
 841    caveat = "None";
 842 #endif
 843
 844    printf("0x%02x %2d %2s %2d %2d %2d %c%c %c  %c %2d %2d %2d %2d %2d %2d %2d",
 845           attribs->id,
 846           attribs->depth,
 847           visual_class_abbrev(attribs->klass),
 848           attribs->transparentType != GLX_NONE,
 849           attribs->bufferSize,
 850           attribs->level,
 851           (attribs->render_type & GLX_RGBA_BIT) ? 'r' : ' ',
 852           (attribs->render_type & GLX_COLOR_INDEX_BIT) ? 'c' : ' ',
 853           attribs->doubleBuffer ? 'y' : '.',
 854           attribs->stereo ? 'y' : '.',
 855           attribs->redSize, attribs->greenSize,
 856           attribs->blueSize, attribs->alphaSize,
 857           attribs->auxBuffers,
 858           attribs->depthSize,
 859           attribs->stencilSize
 860           );
 861
 862    printf(" %2d %2d %2d %2d %2d %1d %s\n",
 863           attribs->accumRedSize, attribs->accumGreenSize,
 864           attribs->accumBlueSize, attribs->accumAlphaSize,
 865           attribs->numSamples, attribs->numMultisample,
 866           caveat
 867           );
 868 }
 869
 870
 871 static void
 872 print_visual_attribs_long_header(void)
 873 {
 874  printf("Vis  Vis   Visual Trans  buff lev render DB ste  r   g   b   a  aux dep ste  accum buffers  MS   MS\n");
 875  printf(" ID Depth   Type  parent size el   type     reo sz  sz  sz  sz  buf th  ncl  r   g   b   a  num bufs\n");
 876  printf("----------------------------------------------------------------------------------------------------\n");
 877 }
 878
 879
 880 static void
 881 print_visual_attribs_long(const struct visual_attribs *attribs)
 882 {
 883    printf("0x%2x %2d %-11s %2d     %2d %2d  %4s %3d %3d %3d %3d %3d %3d",
 884           attribs->id,
 885           attribs->depth,
 886           visual_class_name(attribs->klass),
 887           attribs->transparentType != GLX_NONE,
 888           attribs->bufferSize,
 889           attribs->level,
 890           visual_render_type_name(attribs->render_type),
 891           attribs->doubleBuffer,
 892           attribs->stereo,
 893           attribs->redSize, attribs->greenSize,
 894           attribs->blueSize, attribs->alphaSize
 895           );
 896
 897    printf(" %3d %4d %2d %3d %3d %3d %3d  %2d  %2d\n",
 898           attribs->auxBuffers,
 899           attribs->depthSize,
 900           attribs->stencilSize,
 901           attribs->accumRedSize, attribs->accumGreenSize,
 902           attribs->accumBlueSize, attribs->accumAlphaSize,
 903           attribs->numSamples, attribs->numMultisample
 904           );
 905 }
 906
 907
 908 static void
 909 print_visual_info(Display *dpy, int scrnum, InfoMode mode)
 910 {
 911    XVisualInfo theTemplate;
 912    XVisualInfo *visuals;
 913    int numVisuals, numGlxVisuals;
 914    long mask;
 915    int i;
 916    struct visual_attribs attribs;
 917
 918    /* get list of all visuals on this screen */
 919    theTemplate.screen = scrnum;
 920    mask = VisualScreenMask;
 921    visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
 922
 923    numGlxVisuals = 0;
 924    for (i = 0; i < numVisuals; i++) {
 925       if (get_visual_attribs(dpy, &visuals[i], &attribs))
 926          numGlxVisuals++;
 927    }
 928
 929    if (numGlxVisuals == 0)
 930       return;
 931
 932    printf("%d GLX Visuals\n", numGlxVisuals);
 933
 934    if (mode == Normal)
 935       print_visual_attribs_short_header();
 936    else if (mode == Wide)
 937       print_visual_attribs_long_header();
 938
 939    for (i = 0; i < numVisuals; i++) {
 940       if (!get_visual_attribs(dpy, &visuals[i], &attribs))
 941          continue;
 942
 943       if (mode == Verbose)
 944          print_visual_attribs_verbose(&attribs);
 945       else if (mode == Normal)
 946          print_visual_attribs_short(&attribs);
 947       else if (mode == Wide)
 948          print_visual_attribs_long(&attribs);
 949    }
 950    printf("\n");
 951
 952    XFree(visuals);
 953 }
 954
 955 #ifdef GLX_VERSION_1_3
 956
 957 static void
 958 print_fbconfig_info(Display *dpy, int scrnum, InfoMode mode)
 959 {
 960    int numFBConfigs;
 961    struct visual_attribs attribs;
 962    GLXFBConfig *fbconfigs;
 963    int i;
 964
 965    /* get list of all fbconfigs on this screen */
 966    fbconfigs = glXGetFBConfigs(dpy, scrnum, &numFBConfigs);
 967
 968    if (numFBConfigs == 0)
 969       return;
 970
 971    printf("%d GLXFBConfigs:\n", numFBConfigs);
 972    if (mode == Normal)
 973       print_visual_attribs_short_header();
 974    else if (mode == Wide)
 975       print_visual_attribs_long_header();
 976
 977    for (i = 0; i < numFBConfigs; i++) {
 978       get_fbconfig_attribs(dpy, fbconfigs[i], &attribs);
 979
 980       if (mode == Verbose)
 981          print_visual_attribs_verbose(&attribs);
 982       else if (mode == Normal)
 983          print_visual_attribs_short(&attribs);
 984       else if (mode == Wide)
 985          print_visual_attribs_long(&attribs);
 986    }
 987    printf("\n");
 988
 989    XFree(fbconfigs);
 990 }
 991
 992 #endif
 993
 994 /*
 995  * Stand-alone Mesa doesn't really implement the GLX protocol so it
 996  * doesn't really know the GLX attributes associated with an X visual.
 997  * The first time a visual is presented to Mesa's pseudo-GLX it
 998  * attaches ancilliary buffers to it (like depth and stencil).
 999  * But that usually only works if glXChooseVisual is used.
1000  * This function calls glXChooseVisual() to sort of "prime the pump"
1001  * for Mesa's GLX so that the visuals that get reported actually
1002  * reflect what applications will see.
1003  * This has no effect when using true GLX.
1004  */
1005 static void
1006 mesa_hack(Display *dpy, int scrnum)
1007 {
1008    static int attribs[] = {
1009       GLX_RGBA,
1010       GLX_RED_SIZE, 1,
1011       GLX_GREEN_SIZE, 1,
1012       GLX_BLUE_SIZE, 1,
1013       GLX_DEPTH_SIZE, 1,
1014       GLX_STENCIL_SIZE, 1,
1015       GLX_ACCUM_RED_SIZE, 1,
1016       GLX_ACCUM_GREEN_SIZE, 1,
1017       GLX_ACCUM_BLUE_SIZE, 1,
1018       GLX_ACCUM_ALPHA_SIZE, 1,
1019       GLX_DOUBLEBUFFER,
1020       None
1021    };
1022    XVisualInfo *visinfo;
1023
1024    visinfo = glXChooseVisual(dpy, scrnum, attribs);
1025    if (visinfo)
1026       XFree(visinfo);
1027 }
1028
1029
1030 /*
1031  * Examine all visuals to find the so-called best one.
1032  * We prefer deepest RGBA buffer with depth, stencil and accum
1033  * that has no caveats.
1034  */
1035 static int
1036 find_best_visual(Display *dpy, int scrnum)
1037 {
1038    XVisualInfo theTemplate;
1039    XVisualInfo *visuals;
1040    int numVisuals;
1041    long mask;
1042    int i;
1043    struct visual_attribs bestVis;
1044
1045    /* get list of all visuals on this screen */
1046    theTemplate.screen = scrnum;
1047    mask = VisualScreenMask;
1048    visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
1049
1050    /* init bestVis with first visual info */
1051    get_visual_attribs(dpy, &visuals[0], &bestVis);
1052
1053    /* try to find a "better" visual */
1054    for (i = 1; i < numVisuals; i++) {
1055       struct visual_attribs vis;
1056
1057       get_visual_attribs(dpy, &visuals[i], &vis);
1058
1059       /* always skip visuals with caveats */
1060       if (vis.visualCaveat != GLX_NONE_EXT)
1061          continue;
1062
1063       /* see if this vis is better than bestVis */
1064       if ((!bestVis.supportsGL && vis.supportsGL) ||
1065           (bestVis.visualCaveat != GLX_NONE_EXT) ||
1066           (!(bestVis.render_type & GLX_RGBA_BIT) && (vis.render_type & GLX_RGBA_BIT)) ||
1067           (!bestVis.doubleBuffer && vis.doubleBuffer) ||
1068           (bestVis.redSize < vis.redSize) ||
1069           (bestVis.greenSize < vis.greenSize) ||
1070           (bestVis.blueSize < vis.blueSize) ||
1071           (bestVis.alphaSize < vis.alphaSize) ||
1072           (bestVis.depthSize < vis.depthSize) ||
1073           (bestVis.stencilSize < vis.stencilSize) ||
1074           (bestVis.accumRedSize < vis.accumRedSize)) {
1075          /* found a better visual */
1076          bestVis = vis;
1077       }
1078    }
1079
1080    XFree(visuals);
1081
1082    return bestVis.id;
1083 }
1084
1085
1086 static void
1087 usage(void)
1088 {
1089    printf("Usage: glxinfo [-v] [-t] [-h] [-i] [-b] [-display <dname>]\n");
1090    printf("\t-v: Print visuals info in verbose form.\n");
1091    printf("\t-t: Print verbose table.\n");
1092    printf("\t-display <dname>: Print GLX visuals on specified server.\n");
1093    printf("\t-h: This information.\n");
1094    printf("\t-i: Force an indirect rendering context.\n");
1095    printf("\t-b: Find the 'best' visual and print it's number.\n");
1096    printf("\t-l: Print interesting OpenGL limits.\n");
1097 }
1098
1099
1100 int
1101 main(int argc, char *argv[])
1102 {
1103    char *displayName = NULL;
1104    Display *dpy;
1105    int numScreens, scrnum;
1106    InfoMode mode = Normal;
1107    GLboolean findBest = GL_FALSE;
1108    GLboolean limits = GL_FALSE;
1109    Bool allowDirect = True;
1110    int i;
1111
1112    for (i = 1; i < argc; i++) {
1113       if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
1114          displayName = argv[i + 1];
1115          i++;
1116       }
1117       else if (strcmp(argv[i], "-t") == 0) {
1118          mode = Wide;
1119       }
1120       else if (strcmp(argv[i], "-v") == 0) {
1121          mode = Verbose;
1122       }
1123       else if (strcmp(argv[i], "-b") == 0) {
1124          findBest = GL_TRUE;
1125       }
1126       else if (strcmp(argv[i], "-i") == 0) {
1127          allowDirect = False;
1128       }
1129       else if (strcmp(argv[i], "-l") == 0) {
1130          limits = GL_TRUE;
1131       }
1132       else if (strcmp(argv[i], "-h") == 0) {
1133          usage();
1134          return 0;
1135       }
1136       else {
1137          printf("Unknown option `%s'\n", argv[i]);
1138          usage();
1139          return 0;
1140       }
1141    }
1142
1143    dpy = XOpenDisplay(displayName);
1144    if (!dpy) {
1145       fprintf(stderr, "Error: unable to open display %s\n", XDisplayName(displayName));
1146       return -1;
1147    }
1148
1149    if (findBest) {
1150       int b;
1151       mesa_hack(dpy, 0);
1152       b = find_best_visual(dpy, 0);
1153       printf("%d\n", b);
1154    }
1155    else {
1156       numScreens = ScreenCount(dpy);
1157       print_display_info(dpy);
1158       for (scrnum = 0; scrnum < numScreens; scrnum++) {
1159          mesa_hack(dpy, scrnum);
1160          print_screen_info(dpy, scrnum, allowDirect, limits);
1161          printf("\n");
1162          print_visual_info(dpy, scrnum, mode);
1163 #ifdef GLX_VERSION_1_3
1164          print_fbconfig_info(dpy, scrnum, mode);
1165 #endif
1166          if (scrnum + 1 < numScreens)
1167             printf("\n\n");
1168       }
1169    }
1170
1171    XCloseDisplay(dpy);
1172
1173    return 0;
1174 }