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
  56 typedef enum
  57 {
  58    Normal,
  59    Wide,
  60    Verbose
  61 } InfoMode;
  62
  63
  64 struct visual_attribs
  65 {
  66    /* X visual attribs */
  67    int id;
  68    int klass;
  69    int depth;
  70    int redMask, greenMask, blueMask;
  71    int colormapSize;
  72    int bitsPerRGB;
  73
  74    /* GL visual attribs */
  75    int supportsGL;
  76    int transparentType;
  77    int transparentRedValue;
  78    int transparentGreenValue;
  79    int transparentBlueValue;
  80    int transparentAlphaValue;
  81    int transparentIndexValue;
  82    int bufferSize;
  83    int level;
  84    int rgba;
  85    int doubleBuffer;
  86    int stereo;
  87    int auxBuffers;
  88    int redSize, greenSize, blueSize, alphaSize;
  89    int depthSize;
  90    int stencilSize;
  91    int accumRedSize, accumGreenSize, accumBlueSize, accumAlphaSize;
  92    int numSamples, numMultisample;
  93    int visualCaveat;
  94 };
  95
  96
  97 /*
  98  * Print a list of extensions, with word-wrapping.
  99  */
 100 static void
 101 print_extension_list(const char *ext)
 102 {
 103    const char *indentString = "    ";
 104    const int indent = 4;
 105    const int max = 79;
 106    int width, i, j;
 107
 108    if (!ext || !ext[0])
 109       return;
 110
 111    width = indent;
 112    printf(indentString);
 113    i = j = 0;
 114    while (1) {
 115       if (ext[j] == ' ' || ext[j] == 0) {
 116          /* found end of an extension name */
 117          const int len = j - i;
 118          if (width + len > max) {
 119             /* start a new line */
 120             printf("\n");
 121             width = indent;
 122             printf(indentString);
 123          }
 124          /* print the extension name between ext[i] and ext[j] */
 125          while (i < j) {
 126             printf("%c", ext[i]);
 127             i++;
 128          }
 129          /* either we're all done, or we'll continue with next extension */
 130          width += len + 1;
 131          if (ext[j] == 0) {
 132             break;
 133          }
 134          else {
 135             i++;
 136             j++;
 137             if (ext[j] == 0)
 138                break;
 139             printf(", ");
 140             width += 2;
 141          }
 142       }
 143       j++;
 144    }
 145    printf("\n");
 146 }
 147
 148
 149 static void
 150 print_display_info(Display *dpy)
 151 {
 152    printf("name of display: %s\n", DisplayString(dpy));
 153 }
 154
 155
 156 /**
 157  * Print interesting limits for vertex/fragment programs.
 158  */
 159 static void
 160 print_program_limits(GLenum target)
 161 {
 162 #if defined(GL_ARB_vertex_program) || defined(GL_ARB_fragment_program)
 163    struct token_name {
 164       GLenum token;
 165       const char *name;
 166    };
 167    static const struct token_name limits[] = {
 168       { GL_MAX_PROGRAM_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_INSTRUCTIONS_ARB" },
 169       { GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB" },
 170       { GL_MAX_PROGRAM_TEMPORARIES_ARB, "GL_MAX_PROGRAM_TEMPORARIES_ARB" },
 171       { GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB, "GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB" },
 172       { GL_MAX_PROGRAM_PARAMETERS_ARB, "GL_MAX_PROGRAM_PARAMETERS_ARB" },
 173       { GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB, "GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB" },
 174       { GL_MAX_PROGRAM_ATTRIBS_ARB, "GL_MAX_PROGRAM_ATTRIBS_ARB" },
 175       { GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB, "GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB" },
 176       { GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB, "GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB" },
 177       { GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB, "GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB" },
 178       { GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB, "GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB" },
 179       { GL_MAX_PROGRAM_ENV_PARAMETERS_ARB, "GL_MAX_PROGRAM_ENV_PARAMETERS_ARB" },
 180       { GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB" },
 181       { GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB" },
 182       { GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB, "GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB" },
 183       { GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB" },
 184       { GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB" },
 185       { GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB" },
 186       { (GLenum) 0, NULL }
 187    };
 188    PFNGLGETPROGRAMIVARBPROC GetProgramivARB_func = (PFNGLGETPROGRAMIVARBPROC)
 189       glXGetProcAddressARB((GLubyte *) "glGetProgramivARB");
 190    GLint max[1];
 191    int i;
 192
 193    if (target == GL_VERTEX_PROGRAM_ARB) {
 194       printf("    GL_VERTEX_PROGRAM_ARB:\n");
 195    }
 196    else if (target == GL_FRAGMENT_PROGRAM_ARB) {
 197       printf("    GL_FRAGMENT_PROGRAM_ARB:\n");
 198    }
 199    else {
 200       return; /* something's wrong */
 201    }
 202
 203    for (i = 0; limits[i].token; i++) {
 204       GetProgramivARB_func(target, limits[i].token, max);
 205       if (glGetError() == GL_NO_ERROR) {
 206          printf("        %s = %d\n", limits[i].name, max[0]);
 207       }
 208    }
 209 #endif /* GL_ARB_vertex_program / GL_ARB_fragment_program */
 210 }
 211
 212
 213 /**
 214  * Print interesting limits for vertex/fragment shaders.
 215  */
 216 static void
 217 print_shader_limits(GLenum target)
 218 {
 219    struct token_name {
 220       GLenum token;
 221       const char *name;
 222    };
 223 #if defined(GL_ARB_vertex_shader)
 224    static const struct token_name vertex_limits[] = {
 225       { GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB, "GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB" },
 226       { GL_MAX_VARYING_FLOATS_ARB, "GL_MAX_VARYING_FLOATS_ARB" },
 227       { GL_MAX_VERTEX_ATTRIBS_ARB, "GL_MAX_VERTEX_ATTRIBS_ARB" },
 228       { GL_MAX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_TEXTURE_IMAGE_UNITS_ARB" },
 229       { GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB" },
 230       { GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB" },
 231       { GL_MAX_TEXTURE_COORDS_ARB, "GL_MAX_TEXTURE_COORDS_ARB" },
 232       { (GLenum) 0, NULL }
 233    };
 234 #endif
 235 #if defined(GL_ARB_fragment_shader)
 236    static const struct token_name fragment_limits[] = {
 237       { GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB, "GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB" },
 238       { GL_MAX_TEXTURE_COORDS_ARB, "GL_MAX_TEXTURE_COORDS_ARB" },
 239       { GL_MAX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_TEXTURE_IMAGE_UNITS_ARB" },
 240       { (GLenum) 0, NULL }
 241    };
 242 #endif
 243    GLint max[1];
 244    int i;
 245
 246 #if defined(GL_ARB_vertex_shader)
 247    if (target == GL_VERTEX_SHADER_ARB) {
 248       printf("    GL_VERTEX_SHADER_ARB:\n");
 249       for (i = 0; vertex_limits[i].token; i++) {
 250          glGetIntegerv(vertex_limits[i].token, max);
 251          if (glGetError() == GL_NO_ERROR) {
 252             printf("        %s = %d\n", vertex_limits[i].name, max[0]);
 253          }
 254       }
 255    }
 256 #endif
 257 #if defined(GL_ARB_fragment_shader)
 258    if (target == GL_FRAGMENT_SHADER_ARB) {
 259       printf("    GL_FRAGMENT_SHADER_ARB:\n");
 260       for (i = 0; fragment_limits[i].token; i++) {
 261          glGetIntegerv(fragment_limits[i].token, max);
 262          if (glGetError() == GL_NO_ERROR) {
 263             printf("        %s = %d\n", fragment_limits[i].name, max[0]);
 264          }
 265       }
 266    }
 267 #endif
 268 }
 269
 270
 271 /**
 272  * Print interesting OpenGL implementation limits.
 273  */
 274 static void
 275 print_limits(const char *extensions)
 276 {
 277    struct token_name {
 278       GLuint count;
 279       GLenum token;
 280       const char *name;
 281    };
 282    static const struct token_name limits[] = {
 283       { 1, GL_MAX_ATTRIB_STACK_DEPTH, "GL_MAX_ATTRIB_STACK_DEPTH" },
 284       { 1, GL_MAX_CLIENT_ATTRIB_STACK_DEPTH, "GL_MAX_CLIENT_ATTRIB_STACK_DEPTH" },
 285       { 1, GL_MAX_CLIP_PLANES, "GL_MAX_CLIP_PLANES" },
 286       { 1, GL_MAX_COLOR_MATRIX_STACK_DEPTH, "GL_MAX_COLOR_MATRIX_STACK_DEPTH" },
 287       { 1, GL_MAX_ELEMENTS_VERTICES, "GL_MAX_ELEMENTS_VERTICES" },
 288       { 1, GL_MAX_ELEMENTS_INDICES, "GL_MAX_ELEMENTS_INDICES" },
 289       { 1, GL_MAX_EVAL_ORDER, "GL_MAX_EVAL_ORDER" },
 290       { 1, GL_MAX_LIGHTS, "GL_MAX_LIGHTS" },
 291       { 1, GL_MAX_LIST_NESTING, "GL_MAX_LIST_NESTING" },
 292       { 1, GL_MAX_MODELVIEW_STACK_DEPTH, "GL_MAX_MODELVIEW_STACK_DEPTH" },
 293       { 1, GL_MAX_NAME_STACK_DEPTH, "GL_MAX_NAME_STACK_DEPTH" },
 294       { 1, GL_MAX_PIXEL_MAP_TABLE, "GL_MAX_PIXEL_MAP_TABLE" },
 295       { 1, GL_MAX_PROJECTION_STACK_DEPTH, "GL_MAX_PROJECTION_STACK_DEPTH" },
 296       { 1, GL_MAX_TEXTURE_STACK_DEPTH, "GL_MAX_TEXTURE_STACK_DEPTH" },
 297       { 1, GL_MAX_TEXTURE_SIZE, "GL_MAX_TEXTURE_SIZE" },
 298       { 1, GL_MAX_3D_TEXTURE_SIZE, "GL_MAX_3D_TEXTURE_SIZE" },
 299       { 2, GL_MAX_VIEWPORT_DIMS, "GL_MAX_VIEWPORT_DIMS" },
 300       { 2, GL_ALIASED_LINE_WIDTH_RANGE, "GL_ALIASED_LINE_WIDTH_RANGE" },
 301       { 2, GL_SMOOTH_LINE_WIDTH_RANGE, "GL_SMOOTH_LINE_WIDTH_RANGE" },
 302       { 2, GL_ALIASED_POINT_SIZE_RANGE, "GL_ALIASED_POINT_SIZE_RANGE" },
 303       { 2, GL_SMOOTH_POINT_SIZE_RANGE, "GL_SMOOTH_POINT_SIZE_RANGE" },
 304 #if defined(GL_ARB_texture_cube_map)
 305       { 1, GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB, "GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB" },
 306 #endif
 307 #if defined(GLX_NV_texture_rectangle)
 308       { 1, GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, "GL_MAX_RECTANGLE_TEXTURE_SIZE_NV" },
 309 #endif
 310 #if defined(GL_ARB_texture_compression)
 311       { 1, GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB, "GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB" },
 312 #endif
 313 #if defined(GL_ARB_multitexture)
 314       { 1, GL_MAX_TEXTURE_UNITS_ARB, "GL_MAX_TEXTURE_UNITS_ARB" },
 315 #endif
 316 #if defined(GL_EXT_texture_lod_bias)
 317       { 1, GL_MAX_TEXTURE_LOD_BIAS_EXT, "GL_MAX_TEXTURE_LOD_BIAS_EXT" },
 318 #endif
 319 #if defined(GL_EXT_texture_filter_anisotropic)
 320       { 1, GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, "GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT" },
 321 #endif
 322 #if defined(GL_ARB_draw_buffers)
 323       { 1, GL_MAX_DRAW_BUFFERS_ARB, "GL_MAX_DRAW_BUFFERS_ARB" },
 324 #endif
 325       { 0, (GLenum) 0, NULL }
 326    };
 327    GLint i, max[2];
 328
 329    printf("OpenGL limits:\n");
 330    for (i = 0; limits[i].count; i++) {
 331       glGetIntegerv(limits[i].token, max);
 332       if (glGetError() == GL_NO_ERROR) {
 333          if (limits[i].count == 1)
 334             printf("    %s = %d\n", limits[i].name, max[0]);
 335          else /* XXX fix if we ever query something with more than 2 values */
 336             printf("    %s = %d, %d\n", limits[i].name, max[0], max[1]);
 337       }
 338    }
 339
 340    /* these don't fit into the above mechanism, unfortunately */
 341    glGetConvolutionParameteriv(GL_CONVOLUTION_2D, GL_MAX_CONVOLUTION_WIDTH, max);
 342    glGetConvolutionParameteriv(GL_CONVOLUTION_2D, GL_MAX_CONVOLUTION_HEIGHT, max+1);
 343    if (glGetError() == GL_NONE) {
 344       printf("    GL_MAX_CONVOLUTION_WIDTH/HEIGHT = %d, %d\n", max[0], max[1]);
 345    }
 346
 347 #if defined(GL_ARB_vertex_program)
 348    if (strstr(extensions, "GL_ARB_vertex_program")) {
 349       print_program_limits(GL_VERTEX_PROGRAM_ARB);
 350    }
 351 #endif
 352 #if defined(GL_ARB_fragment_program)
 353    if (strstr(extensions, "GL_ARB_fragment_program")) {
 354       print_program_limits(GL_FRAGMENT_PROGRAM_ARB);
 355    }
 356 #endif
 357 #if defined(GL_ARB_vertex_shader)
 358    if (strstr(extensions, "GL_ARB_vertex_shader")) {
 359       print_shader_limits(GL_VERTEX_SHADER_ARB);
 360    }
 361 #endif
 362 #if defined(GL_ARB_fragment_shader)
 363    if (strstr(extensions, "GL_ARB_fragment_shader")) {
 364       print_shader_limits(GL_FRAGMENT_SHADER_ARB);
 365    }
 366 #endif
 367 }
 368
 369
 370 static void
 371 print_screen_info(Display *dpy, int scrnum, Bool allowDirect, GLboolean limits)
 372 {
 373    Window win;
 374    int attribSingle[] = {
 375       GLX_RGBA,
 376       GLX_RED_SIZE, 1,
 377       GLX_GREEN_SIZE, 1,
 378       GLX_BLUE_SIZE, 1,
 379       None };
 380    int attribDouble[] = {
 381       GLX_RGBA,
 382       GLX_RED_SIZE, 1,
 383       GLX_GREEN_SIZE, 1,
 384       GLX_BLUE_SIZE, 1,
 385       GLX_DOUBLEBUFFER,
 386       None };
 387
 388    XSetWindowAttributes attr;
 389    unsigned long mask;
 390    Window root;
 391    GLXContext ctx;
 392    XVisualInfo *visinfo;
 393    int width = 100, height = 100;
 394
 395    root = RootWindow(dpy, scrnum);
 396
 397    visinfo = glXChooseVisual(dpy, scrnum, attribSingle);
 398    if (!visinfo) {
 399       visinfo = glXChooseVisual(dpy, scrnum, attribDouble);
 400       if (!visinfo) {
 401          fprintf(stderr, "Error: couldn't find RGB GLX visual\n");
 402          return;
 403       }
 404    }
 405
 406    attr.background_pixel = 0;
 407    attr.border_pixel = 0;
 408    attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
 409    attr.event_mask = StructureNotifyMask | ExposureMask;
 410    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 411    win = XCreateWindow(dpy, root, 0, 0, width, height,
 412                        0, visinfo->depth, InputOutput,
 413                        visinfo->visual, mask, &attr);
 414
 415    ctx = glXCreateContext( dpy, visinfo, NULL, allowDirect );
 416    if (!ctx) {
 417       fprintf(stderr, "Error: glXCreateContext failed\n");
 418       XFree(visinfo);
 419       XDestroyWindow(dpy, win);
 420       return;
 421    }
 422
 423    if (glXMakeCurrent(dpy, win, ctx)) {
 424       const char *serverVendor = glXQueryServerString(dpy, scrnum, GLX_VENDOR);
 425       const char *serverVersion = glXQueryServerString(dpy, scrnum, GLX_VERSION);
 426       const char *serverExtensions = glXQueryServerString(dpy, scrnum, GLX_EXTENSIONS);
 427       const char *clientVendor = glXGetClientString(dpy, GLX_VENDOR);
 428       const char *clientVersion = glXGetClientString(dpy, GLX_VERSION);
 429       const char *clientExtensions = glXGetClientString(dpy, GLX_EXTENSIONS);
 430       const char *glxExtensions = glXQueryExtensionsString(dpy, scrnum);
 431       const char *glVendor = (const char *) glGetString(GL_VENDOR);
 432       const char *glRenderer = (const char *) glGetString(GL_RENDERER);
 433       const char *glVersion = (const char *) glGetString(GL_VERSION);
 434       const char *glExtensions = (const char *) glGetString(GL_EXTENSIONS);
 435       int glxVersionMajor;
 436       int glxVersionMinor;
 437       char *displayName = NULL;
 438       char *colon = NULL, *period = NULL;
 439
 440       if (! glXQueryVersion( dpy, & glxVersionMajor, & glxVersionMinor )) {
 441          fprintf(stderr, "Error: glXQueryVersion failed\n");
 442          exit(1);
 443       }
 444
 445       /* Strip the screen number from the display name, if present. */
 446       if (!(displayName = (char *) malloc(strlen(DisplayString(dpy)) + 1))) {
 447          fprintf(stderr, "Error: malloc() failed\n");
 448          exit(1);
 449       }
 450       strcpy(displayName, DisplayString(dpy));
 451       colon = strrchr(displayName, ':');
 452       if (colon) {
 453          period = strchr(colon, '.');
 454          if (period)
 455             *period = '\0';
 456       }
 457       printf("display: %s  screen: %d\n", displayName, scrnum);
 458       free(displayName);
 459       printf("direct rendering: %s\n", glXIsDirect(dpy, ctx) ? "Yes" : "No");
 460       printf("server glx vendor string: %s\n", serverVendor);
 461       printf("server glx version string: %s\n", serverVersion);
 462       printf("server glx extensions:\n");
 463       print_extension_list(serverExtensions);
 464       printf("client glx vendor string: %s\n", clientVendor);
 465       printf("client glx version string: %s\n", clientVersion);
 466       printf("client glx extensions:\n");
 467       print_extension_list(clientExtensions);
 468       printf("GLX version: %u.%u\n", glxVersionMajor, glxVersionMinor);
 469       printf("GLX extensions:\n");
 470       print_extension_list(glxExtensions);
 471       printf("OpenGL vendor string: %s\n", glVendor);
 472       printf("OpenGL renderer string: %s\n", glRenderer);
 473       printf("OpenGL version string: %s\n", glVersion);
 474       printf("OpenGL extensions:\n");
 475       print_extension_list(glExtensions);
 476       if (limits)
 477          print_limits(glExtensions);
 478    }
 479    else {
 480       fprintf(stderr, "Error: glXMakeCurrent failed\n");
 481    }
 482
 483    glXDestroyContext(dpy, ctx);
 484    XFree(visinfo);
 485    XDestroyWindow(dpy, win);
 486 }
 487
 488
 489 static const char *
 490 visual_class_name(int cls)
 491 {
 492    switch (cls) {
 493       case StaticColor:
 494          return "StaticColor";
 495       case PseudoColor:
 496          return "PseudoColor";
 497       case StaticGray:
 498          return "StaticGray";
 499       case GrayScale:
 500          return "GrayScale";
 501       case TrueColor:
 502          return "TrueColor";
 503       case DirectColor:
 504          return "DirectColor";
 505       default:
 506          return "";
 507    }
 508 }
 509
 510
 511 static const char *
 512 visual_class_abbrev(int cls)
 513 {
 514    switch (cls) {
 515       case StaticColor:
 516          return "sc";
 517       case PseudoColor:
 518          return "pc";
 519       case StaticGray:
 520          return "sg";
 521       case GrayScale:
 522          return "gs";
 523       case TrueColor:
 524          return "tc";
 525       case DirectColor:
 526          return "dc";
 527       default:
 528          return "";
 529    }
 530 }
 531
 532
 533 static void
 534 get_visual_attribs(Display *dpy, XVisualInfo *vInfo,
 535                    struct visual_attribs *attribs)
 536 {
 537    const char *ext = glXQueryExtensionsString(dpy, vInfo->screen);
 538
 539    memset(attribs, 0, sizeof(struct visual_attribs));
 540
 541    attribs->id = vInfo->visualid;
 542 #if defined(__cplusplus) || defined(c_plusplus)
 543    attribs->klass = vInfo->c_class;
 544 #else
 545    attribs->klass = vInfo->class;
 546 #endif
 547    attribs->depth = vInfo->depth;
 548    attribs->redMask = vInfo->red_mask;
 549    attribs->greenMask = vInfo->green_mask;
 550    attribs->blueMask = vInfo->blue_mask;
 551    attribs->colormapSize = vInfo->colormap_size;
 552    attribs->bitsPerRGB = vInfo->bits_per_rgb;
 553
 554    if (glXGetConfig(dpy, vInfo, GLX_USE_GL, &attribs->supportsGL) != 0)
 555       return;
 556    glXGetConfig(dpy, vInfo, GLX_BUFFER_SIZE, &attribs->bufferSize);
 557    glXGetConfig(dpy, vInfo, GLX_LEVEL, &attribs->level);
 558    glXGetConfig(dpy, vInfo, GLX_RGBA, &attribs->rgba);
 559    glXGetConfig(dpy, vInfo, GLX_DOUBLEBUFFER, &attribs->doubleBuffer);
 560    glXGetConfig(dpy, vInfo, GLX_STEREO, &attribs->stereo);
 561    glXGetConfig(dpy, vInfo, GLX_AUX_BUFFERS, &attribs->auxBuffers);
 562    glXGetConfig(dpy, vInfo, GLX_RED_SIZE, &attribs->redSize);
 563    glXGetConfig(dpy, vInfo, GLX_GREEN_SIZE, &attribs->greenSize);
 564    glXGetConfig(dpy, vInfo, GLX_BLUE_SIZE, &attribs->blueSize);
 565    glXGetConfig(dpy, vInfo, GLX_ALPHA_SIZE, &attribs->alphaSize);
 566    glXGetConfig(dpy, vInfo, GLX_DEPTH_SIZE, &attribs->depthSize);
 567    glXGetConfig(dpy, vInfo, GLX_STENCIL_SIZE, &attribs->stencilSize);
 568    glXGetConfig(dpy, vInfo, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize);
 569    glXGetConfig(dpy, vInfo, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize);
 570    glXGetConfig(dpy, vInfo, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize);
 571    glXGetConfig(dpy, vInfo, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize);
 572
 573    /* get transparent pixel stuff */
 574    glXGetConfig(dpy, vInfo,GLX_TRANSPARENT_TYPE, &attribs->transparentType);
 575    if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
 576      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue);
 577      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue);
 578      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue);
 579      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue);
 580    }
 581    else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
 582      glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue);
 583    }
 584
 585    /* multisample attribs */
 586 #ifdef GLX_ARB_multisample
 587    if (ext && strstr(ext, "GLX_ARB_multisample") == 0) {
 588       glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample);
 589       glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples);
 590    }
 591 #endif
 592    else {
 593       attribs->numSamples = 0;
 594       attribs->numMultisample = 0;
 595    }
 596
 597 #if defined(GLX_EXT_visual_rating)
 598    if (ext && strstr(ext, "GLX_EXT_visual_rating")) {
 599       glXGetConfig(dpy, vInfo, GLX_VISUAL_CAVEAT_EXT, &attribs->visualCaveat);
 600    }
 601    else {
 602       attribs->visualCaveat = GLX_NONE_EXT;
 603    }
 604 #else
 605    attribs->visualCaveat = 0;
 606 #endif
 607 }
 608
 609
 610 static void
 611 print_visual_attribs_verbose(const struct visual_attribs *attribs)
 612 {
 613    printf("Visual ID: %x  depth=%d  class=%s\n",
 614           attribs->id, attribs->depth, visual_class_name(attribs->klass));
 615    printf("    bufferSize=%d level=%d renderType=%s doubleBuffer=%d stereo=%d\n",
 616           attribs->bufferSize, attribs->level, attribs->rgba ? "rgba" : "ci",
 617           attribs->doubleBuffer, attribs->stereo);
 618    printf("    rgba: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
 619           attribs->redSize, attribs->greenSize,
 620           attribs->blueSize, attribs->alphaSize);
 621    printf("    auxBuffers=%d depthSize=%d stencilSize=%d\n",
 622           attribs->auxBuffers, attribs->depthSize, attribs->stencilSize);
 623    printf("    accum: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
 624           attribs->accumRedSize, attribs->accumGreenSize,
 625           attribs->accumBlueSize, attribs->accumAlphaSize);
 626    printf("    multiSample=%d  multiSampleBuffers=%d\n",
 627           attribs->numSamples, attribs->numMultisample);
 628 #ifdef GLX_EXT_visual_rating
 629    if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
 630       printf("    visualCaveat=None\n");
 631    else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
 632       printf("    visualCaveat=Slow\n");
 633    else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
 634       printf("    visualCaveat=Nonconformant\n");
 635 #endif
 636    if (attribs->transparentType == GLX_NONE) {
 637      printf("    Opaque.\n");
 638    }
 639    else if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
 640      printf("    Transparent RGB: Red=%d Green=%d Blue=%d Alpha=%d\n",attribs->transparentRedValue,attribs->transparentGreenValue,attribs->transparentBlueValue,attribs->transparentAlphaValue);
 641    }
 642    else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
 643      printf("    Transparent index=%d\n",attribs->transparentIndexValue);
 644    }
 645 }
 646
 647
 648 static void
 649 print_visual_attribs_short_header(void)
 650 {
 651  printf("   visual  x  bf lv rg d st colorbuffer ax dp st accumbuffer  ms  cav\n");
 652  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");
 653  printf("----------------------------------------------------------------------\n");
 654 }
 655
 656
 657 static void
 658 print_visual_attribs_short(const struct visual_attribs *attribs)
 659 {
 660    char *caveat = NULL;
 661 #ifdef GLX_EXT_visual_rating
 662    if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
 663       caveat = "None";
 664    else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
 665       caveat = "Slow";
 666    else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
 667       caveat = "Ncon";
 668    else
 669       caveat = "None";
 670 #else
 671    caveat = "None";
 672 #endif
 673
 674    printf("0x%2x %2d %2s %2d %2d %2d %1s %2s %2s %2d %2d %2d %2d %2d %2d %2d",
 675           attribs->id,
 676           attribs->depth,
 677           visual_class_abbrev(attribs->klass),
 678           attribs->transparentType != GLX_NONE,
 679           attribs->bufferSize,
 680           attribs->level,
 681           attribs->rgba ? "r" : "c",
 682           attribs->doubleBuffer ? "y" : ".",
 683           attribs->stereo ? "y" : ".",
 684           attribs->redSize, attribs->greenSize,
 685           attribs->blueSize, attribs->alphaSize,
 686           attribs->auxBuffers,
 687           attribs->depthSize,
 688           attribs->stencilSize
 689           );
 690
 691    printf(" %2d %2d %2d %2d %2d %1d %s\n",
 692           attribs->accumRedSize, attribs->accumGreenSize,
 693           attribs->accumBlueSize, attribs->accumAlphaSize,
 694           attribs->numSamples, attribs->numMultisample,
 695           caveat
 696           );
 697 }
 698
 699
 700 static void
 701 print_visual_attribs_long_header(void)
 702 {
 703  printf("Vis  Vis   Visual Trans  buff lev render DB ste  r   g   b   a  aux dep ste  accum buffers  MS   MS\n");
 704  printf(" ID Depth   Type  parent size el   type     reo sz  sz  sz  sz  buf th  ncl  r   g   b   a  num bufs\n");
 705  printf("----------------------------------------------------------------------------------------------------\n");
 706 }
 707
 708
 709 static void
 710 print_visual_attribs_long(const struct visual_attribs *attribs)
 711 {
 712    printf("0x%2x %2d %-11s %2d     %2d %2d  %4s %3d %3d %3d %3d %3d %3d",
 713           attribs->id,
 714           attribs->depth,
 715           visual_class_name(attribs->klass),
 716           attribs->transparentType != GLX_NONE,
 717           attribs->bufferSize,
 718           attribs->level,
 719           attribs->rgba ? "rgba" : "ci  ",
 720           attribs->doubleBuffer,
 721           attribs->stereo,
 722           attribs->redSize, attribs->greenSize,
 723           attribs->blueSize, attribs->alphaSize
 724           );
 725
 726    printf(" %3d %4d %2d %3d %3d %3d %3d  %2d  %2d\n",
 727           attribs->auxBuffers,
 728           attribs->depthSize,
 729           attribs->stencilSize,
 730           attribs->accumRedSize, attribs->accumGreenSize,
 731           attribs->accumBlueSize, attribs->accumAlphaSize,
 732           attribs->numSamples, attribs->numMultisample
 733           );
 734 }
 735
 736
 737 static void
 738 print_visual_info(Display *dpy, int scrnum, InfoMode mode)
 739 {
 740    XVisualInfo theTemplate;
 741    XVisualInfo *visuals;
 742    int numVisuals;
 743    long mask;
 744    int i;
 745
 746    /* get list of all visuals on this screen */
 747    theTemplate.screen = scrnum;
 748    mask = VisualScreenMask;
 749    visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
 750
 751    if (mode == Verbose) {
 752       for (i = 0; i < numVisuals; i++) {
 753          struct visual_attribs attribs;
 754          get_visual_attribs(dpy, &visuals[i], &attribs);
 755          print_visual_attribs_verbose(&attribs);
 756       }
 757    }
 758    else if (mode == Normal) {
 759       print_visual_attribs_short_header();
 760       for (i = 0; i < numVisuals; i++) {
 761          struct visual_attribs attribs;
 762          get_visual_attribs(dpy, &visuals[i], &attribs);
 763          print_visual_attribs_short(&attribs);
 764       }
 765    }
 766    else if (mode == Wide) {
 767       print_visual_attribs_long_header();
 768       for (i = 0; i < numVisuals; i++) {
 769          struct visual_attribs attribs;
 770          get_visual_attribs(dpy, &visuals[i], &attribs);
 771          print_visual_attribs_long(&attribs);
 772       }
 773    }
 774
 775    XFree(visuals);
 776 }
 777
 778
 779 /*
 780  * Stand-alone Mesa doesn't really implement the GLX protocol so it
 781  * doesn't really know the GLX attributes associated with an X visual.
 782  * The first time a visual is presented to Mesa's pseudo-GLX it
 783  * attaches ancilliary buffers to it (like depth and stencil).
 784  * But that usually only works if glXChooseVisual is used.
 785  * This function calls glXChooseVisual() to sort of "prime the pump"
 786  * for Mesa's GLX so that the visuals that get reported actually
 787  * reflect what applications will see.
 788  * This has no effect when using true GLX.
 789  */
 790 static void
 791 mesa_hack(Display *dpy, int scrnum)
 792 {
 793    static int attribs[] = {
 794       GLX_RGBA,
 795       GLX_RED_SIZE, 1,
 796       GLX_GREEN_SIZE, 1,
 797       GLX_BLUE_SIZE, 1,
 798       GLX_DEPTH_SIZE, 1,
 799       GLX_STENCIL_SIZE, 1,
 800       GLX_ACCUM_RED_SIZE, 1,
 801       GLX_ACCUM_GREEN_SIZE, 1,
 802       GLX_ACCUM_BLUE_SIZE, 1,
 803       GLX_ACCUM_ALPHA_SIZE, 1,
 804       GLX_DOUBLEBUFFER,
 805       None
 806    };
 807    XVisualInfo *visinfo;
 808
 809    visinfo = glXChooseVisual(dpy, scrnum, attribs);
 810    if (visinfo)
 811       XFree(visinfo);
 812 }
 813
 814
 815 /*
 816  * Examine all visuals to find the so-called best one.
 817  * We prefer deepest RGBA buffer with depth, stencil and accum
 818  * that has no caveats.
 819  */
 820 static int
 821 find_best_visual(Display *dpy, int scrnum)
 822 {
 823    XVisualInfo theTemplate;
 824    XVisualInfo *visuals;
 825    int numVisuals;
 826    long mask;
 827    int i;
 828    struct visual_attribs bestVis;
 829
 830    /* get list of all visuals on this screen */
 831    theTemplate.screen = scrnum;
 832    mask = VisualScreenMask;
 833    visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
 834
 835    /* init bestVis with first visual info */
 836    get_visual_attribs(dpy, &visuals[0], &bestVis);
 837
 838    /* try to find a "better" visual */
 839    for (i = 1; i < numVisuals; i++) {
 840       struct visual_attribs vis;
 841
 842       get_visual_attribs(dpy, &visuals[i], &vis);
 843
 844       /* always skip visuals with caveats */
 845       if (vis.visualCaveat != GLX_NONE_EXT)
 846          continue;
 847
 848       /* see if this vis is better than bestVis */
 849       if ((!bestVis.supportsGL && vis.supportsGL) ||
 850           (bestVis.visualCaveat != GLX_NONE_EXT) ||
 851           (!bestVis.rgba && vis.rgba) ||
 852           (!bestVis.doubleBuffer && vis.doubleBuffer) ||
 853           (bestVis.redSize < vis.redSize) ||
 854           (bestVis.greenSize < vis.greenSize) ||
 855           (bestVis.blueSize < vis.blueSize) ||
 856           (bestVis.alphaSize < vis.alphaSize) ||
 857           (bestVis.depthSize < vis.depthSize) ||
 858           (bestVis.stencilSize < vis.stencilSize) ||
 859           (bestVis.accumRedSize < vis.accumRedSize)) {
 860          /* found a better visual */
 861          bestVis = vis;
 862       }
 863    }
 864
 865    XFree(visuals);
 866
 867    return bestVis.id;
 868 }
 869
 870
 871 static void
 872 usage(void)
 873 {
 874    printf("Usage: glxinfo [-v] [-t] [-h] [-i] [-b] [-display <dname>]\n");
 875    printf("\t-v: Print visuals info in verbose form.\n");
 876    printf("\t-t: Print verbose table.\n");
 877    printf("\t-display <dname>: Print GLX visuals on specified server.\n");
 878    printf("\t-h: This information.\n");
 879    printf("\t-i: Force an indirect rendering context.\n");
 880    printf("\t-b: Find the 'best' visual and print it's number.\n");
 881    printf("\t-l: Print interesting OpenGL limits.\n");
 882 }
 883
 884
 885 int
 886 main(int argc, char *argv[])
 887 {
 888    char *displayName = NULL;
 889    Display *dpy;
 890    int numScreens, scrnum;
 891    InfoMode mode = Normal;
 892    GLboolean findBest = GL_FALSE;
 893    GLboolean limits = GL_FALSE;
 894    Bool allowDirect = True;
 895    int i;
 896
 897    for (i = 1; i < argc; i++) {
 898       if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
 899          displayName = argv[i + 1];
 900          i++;
 901       }
 902       else if (strcmp(argv[i], "-t") == 0) {
 903          mode = Wide;
 904       }
 905       else if (strcmp(argv[i], "-v") == 0) {
 906          mode = Verbose;
 907       }
 908       else if (strcmp(argv[i], "-b") == 0) {
 909          findBest = GL_TRUE;
 910       }
 911       else if (strcmp(argv[i], "-i") == 0) {
 912          allowDirect = False;
 913       }
 914       else if (strcmp(argv[i], "-l") == 0) {
 915          limits = GL_TRUE;
 916       }
 917       else if (strcmp(argv[i], "-h") == 0) {
 918          usage();
 919          return 0;
 920       }
 921       else {
 922          printf("Unknown option `%s'\n", argv[i]);
 923          usage();
 924          return 0;
 925       }
 926    }
 927
 928    dpy = XOpenDisplay(displayName);
 929    if (!dpy) {
 930       fprintf(stderr, "Error: unable to open display %s\n", displayName);
 931       return -1;
 932    }
 933
 934    if (findBest) {
 935       int b;
 936       mesa_hack(dpy, 0);
 937       b = find_best_visual(dpy, 0);
 938       printf("%d\n", b);
 939    }
 940    else {
 941       numScreens = ScreenCount(dpy);
 942       print_display_info(dpy);
 943       for (scrnum = 0; scrnum < numScreens; scrnum++) {
 944          mesa_hack(dpy, scrnum);
 945          print_screen_info(dpy, scrnum, allowDirect, limits);
 946          printf("\n");
 947          print_visual_info(dpy, scrnum, mode);
 948          if (scrnum + 1 < numScreens)
 949             printf("\n\n");
 950       }
 951    }
 952
 953    XCloseDisplay(dpy);
 954
 955    return 0;
 956 }