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/*
* Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/* $XFree86: xc/programs/glxinfo/glxinfo.c,v 1.10 2002/11/20 04:43:50 dawes Exp $ */
/*
* This program is a work-alike of the IRIX glxinfo program.
* Command line options:
* -t print wide table
* -v print verbose information
* -display DisplayName specify the X display to interogate
* -b only print ID of "best" visual on screen 0
* -i use indirect rendering connection only
* -l print interesting OpenGL limits (added 5 Sep 2002)
*
* Brian Paul 26 January 2000
*/
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <GL/gl.h>
#ifdef DO_GLU
#include <GL/glu.h>
#endif
#include <GL/glx.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifndef GLX_NONE_EXT
#define GLX_NONE_EXT 0x8000
#endif
#ifndef GLX_TRANSPARENT_RGB
#define GLX_TRANSPARENT_RGB 0x8008
#endif
typedef enum
{
Normal,
Wide,
Verbose
} InfoMode;
struct visual_attribs
{
/* X visual attribs */
int id;
int klass;
int depth;
int redMask, greenMask, blueMask;
int colormapSize;
int bitsPerRGB;
/* GL visual attribs */
int supportsGL;
int transparentType;
int transparentRedValue;
int transparentGreenValue;
int transparentBlueValue;
int transparentAlphaValue;
int transparentIndexValue;
int bufferSize;
int level;
int rgba;
int doubleBuffer;
int stereo;
int auxBuffers;
int redSize, greenSize, blueSize, alphaSize;
int depthSize;
int stencilSize;
int accumRedSize, accumGreenSize, accumBlueSize, accumAlphaSize;
int numSamples, numMultisample;
int visualCaveat;
};
/*
* Print a list of extensions, with word-wrapping.
*/
static void
print_extension_list(const char *ext)
{
const char *indentString = " ";
const int indent = 4;
const int max = 79;
int width, i, j;
if (!ext || !ext[0])
return;
width = indent;
printf(indentString);
i = j = 0;
while (1) {
if (ext[j] == ' ' || ext[j] == 0) {
/* found end of an extension name */
const int len = j - i;
if (width + len > max) {
/* start a new line */
printf("\n");
width = indent;
printf(indentString);
}
/* print the extension name between ext[i] and ext[j] */
while (i < j) {
printf("%c", ext[i]);
i++;
}
/* either we're all done, or we'll continue with next extension */
width += len + 1;
if (ext[j] == 0) {
break;
}
else {
i++;
j++;
if (ext[j] == 0)
break;
printf(", ");
width += 2;
}
}
j++;
}
printf("\n");
}
static void
print_display_info(Display *dpy)
{
printf("name of display: %s\n", DisplayString(dpy));
}
static void
print_limits(void)
{
struct token_name {
GLuint count;
GLenum token;
const char *name;
};
static const struct token_name limits[] = {
{ 1, GL_MAX_ATTRIB_STACK_DEPTH, "GL_MAX_ATTRIB_STACK_DEPTH" },
{ 1, GL_MAX_CLIENT_ATTRIB_STACK_DEPTH, "GL_MAX_CLIENT_ATTRIB_STACK_DEPTH" },
{ 1, GL_MAX_CLIP_PLANES, "GL_MAX_CLIP_PLANES" },
{ 1, GL_MAX_COLOR_MATRIX_STACK_DEPTH, "GL_MAX_COLOR_MATRIX_STACK_DEPTH" },
{ 1, GL_MAX_ELEMENTS_VERTICES, "GL_MAX_ELEMENTS_VERTICES" },
{ 1, GL_MAX_ELEMENTS_INDICES, "GL_MAX_ELEMENTS_INDICES" },
{ 1, GL_MAX_EVAL_ORDER, "GL_MAX_EVAL_ORDER" },
{ 1, GL_MAX_LIGHTS, "GL_MAX_LIGHTS" },
{ 1, GL_MAX_LIST_NESTING, "GL_MAX_LIST_NESTING" },
{ 1, GL_MAX_MODELVIEW_STACK_DEPTH, "GL_MAX_MODELVIEW_STACK_DEPTH" },
{ 1, GL_MAX_NAME_STACK_DEPTH, "GL_MAX_NAME_STACK_DEPTH" },
{ 1, GL_MAX_PIXEL_MAP_TABLE, "GL_MAX_PIXEL_MAP_TABLE" },
{ 1, GL_MAX_PROJECTION_STACK_DEPTH, "GL_MAX_PROJECTION_STACK_DEPTH" },
{ 1, GL_MAX_TEXTURE_STACK_DEPTH, "GL_MAX_TEXTURE_STACK_DEPTH" },
{ 1, GL_MAX_TEXTURE_SIZE, "GL_MAX_TEXTURE_SIZE" },
{ 1, GL_MAX_3D_TEXTURE_SIZE, "GL_MAX_3D_TEXTURE_SIZE" },
{ 1, GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB, "GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB" },
#ifdef GL_MAX_RECTANGLE_TEXTURE_SIZE_NV
{ 1, GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, "GL_MAX_RECTANGLE_TEXTURE_SIZE_NV" },
#endif /* GL_MAX_RECTANGLE_TEXTURE_SIZE_NV */
{ 1, GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB, "GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB" },
{ 1, GL_MAX_TEXTURE_UNITS_ARB, "GL_MAX_TEXTURE_UNITS_ARB" },
#ifdef GL_MAX_TEXTURE_LOD_BIAS_EXT
{ 1, GL_MAX_TEXTURE_LOD_BIAS_EXT, "GL_MAX_TEXTURE_LOD_BIAS_EXT" },
#endif /* GL_MAX_TEXTURE_LOD_BIAS_EXT */
{ 1, GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, "GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT" },
{ 2, GL_MAX_VIEWPORT_DIMS, "GL_MAX_VIEWPORT_DIMS" },
{ 2, GL_ALIASED_LINE_WIDTH_RANGE, "GL_ALIASED_LINE_WIDTH_RANGE" },
{ 2, GL_SMOOTH_LINE_WIDTH_RANGE, "GL_SMOOTH_LINE_WIDTH_RANGE" },
{ 2, GL_ALIASED_POINT_SIZE_RANGE, "GL_ALIASED_POINT_SIZE_RANGE" },
{ 2, GL_SMOOTH_POINT_SIZE_RANGE, "GL_SMOOTH_POINT_SIZE_RANGE" },
{ 0, (GLenum) 0, NULL }
};
GLint i, max[2];
printf("OpenGL limits:\n");
for (i = 0; limits[i].count; i++) {
glGetIntegerv(limits[i].token, max);
if (glGetError() == GL_NONE) {
if (limits[i].count == 1)
printf(" %s = %d\n", limits[i].name, max[0]);
else /* XXX fix if we ever query something with more than 2 values */
printf(" %s = %d, %d\n", limits[i].name, max[0], max[1]);
}
}
}
static void
print_screen_info(Display *dpy, int scrnum, Bool allowDirect, GLboolean limits)
{
Window win;
int attribSingle[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
None };
int attribDouble[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
XSetWindowAttributes attr;
unsigned long mask;
Window root;
GLXContext ctx;
XVisualInfo *visinfo;
int width = 100, height = 100;
root = RootWindow(dpy, scrnum);
visinfo = glXChooseVisual(dpy, scrnum, attribSingle);
if (!visinfo) {
visinfo = glXChooseVisual(dpy, scrnum, attribDouble);
if (!visinfo) {
fprintf(stderr, "Error: couldn't find RGB GLX visual\n");
return;
}
}
attr.background_pixel = 0;
attr.border_pixel = 0;
attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
attr.event_mask = StructureNotifyMask | ExposureMask;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
win = XCreateWindow(dpy, root, 0, 0, width, height,
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr);
ctx = glXCreateContext( dpy, visinfo, NULL, allowDirect );
if (!ctx) {
fprintf(stderr, "Error: glXCreateContext failed\n");
XDestroyWindow(dpy, win);
return;
}
if (glXMakeCurrent(dpy, win, ctx)) {
const char *serverVendor = glXQueryServerString(dpy, scrnum, GLX_VENDOR);
const char *serverVersion = glXQueryServerString(dpy, scrnum, GLX_VERSION);
const char *serverExtensions = glXQueryServerString(dpy, scrnum, GLX_EXTENSIONS);
const char *clientVendor = glXGetClientString(dpy, GLX_VENDOR);
const char *clientVersion = glXGetClientString(dpy, GLX_VERSION);
const char *clientExtensions = glXGetClientString(dpy, GLX_EXTENSIONS);
const char *glxExtensions = glXQueryExtensionsString(dpy, scrnum);
const char *glVendor = (const char *) glGetString(GL_VENDOR);
const char *glRenderer = (const char *) glGetString(GL_RENDERER);
const char *glVersion = (const char *) glGetString(GL_VERSION);
const char *glExtensions = (const char *) glGetString(GL_EXTENSIONS);
char *displayName = NULL;
char *colon = NULL, *period = NULL;
#ifdef DO_GLU
const char *gluVersion = (const char *) gluGetString(GLU_VERSION);
const char *gluExtensions = (const char *) gluGetString(GLU_EXTENSIONS);
#endif
/* Strip the screen number from the display name, if present. */
if (!(displayName = (char *) malloc(strlen(DisplayString(dpy)) + 1))) {
fprintf(stderr, "Error: malloc() failed\n");
exit(1);
}
strcpy(displayName, DisplayString(dpy));
colon = strrchr(displayName, ':');
if (colon) {
period = strchr(colon, '.');
if (period)
*period = '\0';
}
printf("display: %s screen: %d\n", displayName, scrnum);
free(displayName);
printf("direct rendering: %s\n", glXIsDirect(dpy, ctx) ? "Yes" : "No");
printf("server glx vendor string: %s\n", serverVendor);
printf("server glx version string: %s\n", serverVersion);
printf("server glx extensions:\n");
print_extension_list(serverExtensions);
printf("client glx vendor string: %s\n", clientVendor);
printf("client glx version string: %s\n", clientVersion);
printf("client glx extensions:\n");
print_extension_list(clientExtensions);
printf("GLX extensions:\n");
print_extension_list(glxExtensions);
printf("OpenGL vendor string: %s\n", glVendor);
printf("OpenGL renderer string: %s\n", glRenderer);
printf("OpenGL version string: %s\n", glVersion);
printf("OpenGL extensions:\n");
print_extension_list(glExtensions);
if (limits)
print_limits();
#ifdef DO_GLU
printf("glu version: %s\n", gluVersion);
printf("glu extensions:\n");
print_extension_list(gluExtensions);
#endif
}
else {
fprintf(stderr, "Error: glXMakeCurrent failed\n");
}
glXDestroyContext(dpy, ctx);
XDestroyWindow(dpy, win);
}
static const char *
visual_class_name(int cls)
{
switch (cls) {
case StaticColor:
return "StaticColor";
case PseudoColor:
return "PseudoColor";
case StaticGray:
return "StaticGray";
case GrayScale:
return "GrayScale";
case TrueColor:
return "TrueColor";
case DirectColor:
return "DirectColor";
default:
return "";
}
}
static const char *
visual_class_abbrev(int cls)
{
switch (cls) {
case StaticColor:
return "sc";
case PseudoColor:
return "pc";
case StaticGray:
return "sg";
case GrayScale:
return "gs";
case TrueColor:
return "tc";
case DirectColor:
return "dc";
default:
return "";
}
}
static void
get_visual_attribs(Display *dpy, XVisualInfo *vInfo,
struct visual_attribs *attribs)
{
const char *ext = glXQueryExtensionsString(dpy, vInfo->screen);
memset(attribs, 0, sizeof(struct visual_attribs));
attribs->id = vInfo->visualid;
#if defined(__cplusplus) || defined(c_plusplus)
attribs->klass = vInfo->c_class;
#else
attribs->klass = vInfo->class;
#endif
attribs->depth = vInfo->depth;
attribs->redMask = vInfo->red_mask;
attribs->greenMask = vInfo->green_mask;
attribs->blueMask = vInfo->blue_mask;
attribs->colormapSize = vInfo->colormap_size;
attribs->bitsPerRGB = vInfo->bits_per_rgb;
if (glXGetConfig(dpy, vInfo, GLX_USE_GL, &attribs->supportsGL) != 0)
return;
glXGetConfig(dpy, vInfo, GLX_BUFFER_SIZE, &attribs->bufferSize);
glXGetConfig(dpy, vInfo, GLX_LEVEL, &attribs->level);
glXGetConfig(dpy, vInfo, GLX_RGBA, &attribs->rgba);
glXGetConfig(dpy, vInfo, GLX_DOUBLEBUFFER, &attribs->doubleBuffer);
glXGetConfig(dpy, vInfo, GLX_STEREO, &attribs->stereo);
glXGetConfig(dpy, vInfo, GLX_AUX_BUFFERS, &attribs->auxBuffers);
glXGetConfig(dpy, vInfo, GLX_RED_SIZE, &attribs->redSize);
glXGetConfig(dpy, vInfo, GLX_GREEN_SIZE, &attribs->greenSize);
glXGetConfig(dpy, vInfo, GLX_BLUE_SIZE, &attribs->blueSize);
glXGetConfig(dpy, vInfo, GLX_ALPHA_SIZE, &attribs->alphaSize);
glXGetConfig(dpy, vInfo, GLX_DEPTH_SIZE, &attribs->depthSize);
glXGetConfig(dpy, vInfo, GLX_STENCIL_SIZE, &attribs->stencilSize);
glXGetConfig(dpy, vInfo, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize);
glXGetConfig(dpy, vInfo, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize);
glXGetConfig(dpy, vInfo, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize);
glXGetConfig(dpy, vInfo, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize);
/* get transparent pixel stuff */
glXGetConfig(dpy, vInfo,GLX_TRANSPARENT_TYPE, &attribs->transparentType);
if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue);
glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue);
glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue);
glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue);
}
else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue);
}
/* multisample attribs */
#ifdef GLX_ARB_multisample
if (ext && strstr("GLX_ARB_multisample", ext) == 0) {
glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample);
glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples);
}
#endif
else {
attribs->numSamples = 0;
attribs->numMultisample = 0;
}
#if defined(GLX_EXT_visual_rating)
if (ext && strstr(ext, "GLX_EXT_visual_rating")) {
glXGetConfig(dpy, vInfo, GLX_VISUAL_CAVEAT_EXT, &attribs->visualCaveat);
}
else {
attribs->visualCaveat = GLX_NONE_EXT;
}
#else
attribs->visualCaveat = 0;
#endif
}
static void
print_visual_attribs_verbose(const struct visual_attribs *attribs)
{
printf("Visual ID: %x depth=%d class=%s\n",
attribs->id, attribs->depth, visual_class_name(attribs->klass));
printf(" bufferSize=%d level=%d renderType=%s doubleBuffer=%d stereo=%d\n",
attribs->bufferSize, attribs->level, attribs->rgba ? "rgba" : "ci",
attribs->doubleBuffer, attribs->stereo);
printf(" rgba: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
attribs->redSize, attribs->greenSize,
attribs->blueSize, attribs->alphaSize);
printf(" auxBuffers=%d depthSize=%d stencilSize=%d\n",
attribs->auxBuffers, attribs->depthSize, attribs->stencilSize);
printf(" accum: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
attribs->accumRedSize, attribs->accumGreenSize,
attribs->accumBlueSize, attribs->accumAlphaSize);
printf(" multiSample=%d multiSampleBuffers=%d\n",
attribs->numSamples, attribs->numMultisample);
#ifdef GLX_EXT_visual_rating
if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
printf(" visualCaveat=None\n");
else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
printf(" visualCaveat=Slow\n");
else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
printf(" visualCaveat=Nonconformant\n");
#endif
if (attribs->transparentType == GLX_NONE) {
printf(" Opaque.\n");
}
else if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
printf(" Transparent RGB: Red=%d Green=%d Blue=%d Alpha=%d\n",attribs->transparentRedValue,attribs->transparentGreenValue,attribs->transparentBlueValue,attribs->transparentAlphaValue);
}
else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
printf(" Transparent index=%d\n",attribs->transparentIndexValue);
}
}
static void
print_visual_attribs_short_header(void)
{
printf(" visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav\n");
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");
printf("----------------------------------------------------------------------\n");
}
static void
print_visual_attribs_short(const struct visual_attribs *attribs)
{
char *caveat = NULL;
#ifdef GLX_EXT_visual_rating
if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
caveat = "None";
else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
caveat = "Slow";
else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
caveat = "Ncon";
else
caveat = "None";
#else
caveat = "None";
#endif
printf("0x%2x %2d %2s %2d %2d %2d %1s %2s %2s %2d %2d %2d %2d %2d %2d %2d",
attribs->id,
attribs->depth,
visual_class_abbrev(attribs->klass),
attribs->transparentType != GLX_NONE,
attribs->bufferSize,
attribs->level,
attribs->rgba ? "r" : "c",
attribs->doubleBuffer ? "y" : ".",
attribs->stereo ? "y" : ".",
attribs->redSize, attribs->greenSize,
attribs->blueSize, attribs->alphaSize,
attribs->auxBuffers,
attribs->depthSize,
attribs->stencilSize
);
printf(" %2d %2d %2d %2d %2d %1d %s\n",
attribs->accumRedSize, attribs->accumGreenSize,
attribs->accumBlueSize, attribs->accumAlphaSize,
attribs->numSamples, attribs->numMultisample,
caveat
);
}
static void
print_visual_attribs_long_header(void)
{
printf("Vis Vis Visual Trans buff lev render DB ste r g b a aux dep ste accum buffers MS MS\n");
printf(" ID Depth Type parent size el type reo sz sz sz sz buf th ncl r g b a num bufs\n");
printf("----------------------------------------------------------------------------------------------------\n");
}
static void
print_visual_attribs_long(const struct visual_attribs *attribs)
{
printf("0x%2x %2d %-11s %2d %2d %2d %4s %3d %3d %3d %3d %3d %3d",
attribs->id,
attribs->depth,
visual_class_name(attribs->klass),
attribs->transparentType != GLX_NONE,
attribs->bufferSize,
attribs->level,
attribs->rgba ? "rgba" : "ci ",
attribs->doubleBuffer,
attribs->stereo,
attribs->redSize, attribs->greenSize,
attribs->blueSize, attribs->alphaSize
);
printf(" %3d %4d %2d %3d %3d %3d %3d %2d %2d\n",
attribs->auxBuffers,
attribs->depthSize,
attribs->stencilSize,
attribs->accumRedSize, attribs->accumGreenSize,
attribs->accumBlueSize, attribs->accumAlphaSize,
attribs->numSamples, attribs->numMultisample
);
}
static void
print_visual_info(Display *dpy, int scrnum, InfoMode mode)
{
XVisualInfo theTemplate;
XVisualInfo *visuals;
int numVisuals;
long mask;
int i;
/* get list of all visuals on this screen */
theTemplate.screen = scrnum;
mask = VisualScreenMask;
visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
if (mode == Verbose) {
for (i = 0; i < numVisuals; i++) {
struct visual_attribs attribs;
get_visual_attribs(dpy, &visuals[i], &attribs);
print_visual_attribs_verbose(&attribs);
}
}
else if (mode == Normal) {
print_visual_attribs_short_header();
for (i = 0; i < numVisuals; i++) {
struct visual_attribs attribs;
get_visual_attribs(dpy, &visuals[i], &attribs);
print_visual_attribs_short(&attribs);
}
}
else if (mode == Wide) {
print_visual_attribs_long_header();
for (i = 0; i < numVisuals; i++) {
struct visual_attribs attribs;
get_visual_attribs(dpy, &visuals[i], &attribs);
print_visual_attribs_long(&attribs);
}
}
XFree(visuals);
}
/*
* Stand-alone Mesa doesn't really implement the GLX protocol so it
* doesn't really know the GLX attributes associated with an X visual.
* The first time a visual is presented to Mesa's pseudo-GLX it
* attaches ancilliary buffers to it (like depth and stencil).
* But that usually only works if glXChooseVisual is used.
* This function calls glXChooseVisual() to sort of "prime the pump"
* for Mesa's GLX so that the visuals that get reported actually
* reflect what applications will see.
* This has no effect when using true GLX.
*/
static void
mesa_hack(Display *dpy, int scrnum)
{
static int attribs[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DEPTH_SIZE, 1,
GLX_STENCIL_SIZE, 1,
GLX_ACCUM_RED_SIZE, 1,
GLX_ACCUM_GREEN_SIZE, 1,
GLX_ACCUM_BLUE_SIZE, 1,
GLX_ACCUM_ALPHA_SIZE, 1,
GLX_DOUBLEBUFFER,
None
};
XVisualInfo *visinfo;
visinfo = glXChooseVisual(dpy, scrnum, attribs);
if (visinfo)
XFree(visinfo);
}
/*
* Examine all visuals to find the so-called best one.
* We prefer deepest RGBA buffer with depth, stencil and accum
* that has no caveats.
*/
static int
find_best_visual(Display *dpy, int scrnum)
{
XVisualInfo theTemplate;
XVisualInfo *visuals;
int numVisuals;
long mask;
int i;
struct visual_attribs bestVis;
/* get list of all visuals on this screen */
theTemplate.screen = scrnum;
mask = VisualScreenMask;
visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
/* init bestVis with first visual info */
get_visual_attribs(dpy, &visuals[0], &bestVis);
/* try to find a "better" visual */
for (i = 1; i < numVisuals; i++) {
struct visual_attribs vis;
get_visual_attribs(dpy, &visuals[i], &vis);
/* always skip visuals with caveats */
if (vis.visualCaveat != GLX_NONE_EXT)
continue;
/* see if this vis is better than bestVis */
if ((!bestVis.supportsGL && vis.supportsGL) ||
(bestVis.visualCaveat != GLX_NONE_EXT) ||
(!bestVis.rgba && vis.rgba) ||
(!bestVis.doubleBuffer && vis.doubleBuffer) ||
(bestVis.redSize < vis.redSize) ||
(bestVis.greenSize < vis.greenSize) ||
(bestVis.blueSize < vis.blueSize) ||
(bestVis.alphaSize < vis.alphaSize) ||
(bestVis.depthSize < vis.depthSize) ||
(bestVis.stencilSize < vis.stencilSize) ||
(bestVis.accumRedSize < vis.accumRedSize)) {
/* found a better visual */
bestVis = vis;
}
}
XFree(visuals);
return bestVis.id;
}
static void
usage(void)
{
printf("Usage: glxinfo [-v] [-t] [-h] [-i] [-b] [-display <dname>]\n");
printf("\t-v: Print visuals info in verbose form.\n");
printf("\t-t: Print verbose table.\n");
printf("\t-display <dname>: Print GLX visuals on specified server.\n");
printf("\t-h: This information.\n");
printf("\t-i: Force an indirect rendering context.\n");
printf("\t-b: Find the 'best' visual and print it's number.\n");
printf("\t-l: Print interesting OpenGL limits.\n");
}
int
main(int argc, char *argv[])
{
char *displayName = NULL;
Display *dpy;
int numScreens, scrnum;
InfoMode mode = Normal;
GLboolean findBest = GL_FALSE;
GLboolean limits = GL_FALSE;
Bool allowDirect = True;
int i;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
displayName = argv[i + 1];
i++;
}
else if (strcmp(argv[i], "-t") == 0) {
mode = Wide;
}
else if (strcmp(argv[i], "-v") == 0) {
mode = Verbose;
}
else if (strcmp(argv[i], "-b") == 0) {
findBest = GL_TRUE;
}
else if (strcmp(argv[i], "-i") == 0) {
allowDirect = False;
}
else if (strcmp(argv[i], "-l") == 0) {
limits = GL_TRUE;
}
else if (strcmp(argv[i], "-h") == 0) {
usage();
return 0;
}
else {
printf("Unknown option `%s'\n", argv[i]);
usage();
return 0;
}
}
dpy = XOpenDisplay(displayName);
if (!dpy) {
fprintf(stderr, "Error: unable to open display %s\n", displayName);
return -1;
}
if (findBest) {
int b;
mesa_hack(dpy, 0);
b = find_best_visual(dpy, 0);
printf("%d\n", b);
}
else {
numScreens = ScreenCount(dpy);
print_display_info(dpy);
for (scrnum = 0; scrnum < numScreens; scrnum++) {
mesa_hack(dpy, scrnum);
print_screen_info(dpy, scrnum, allowDirect, limits);
printf("\n");
print_visual_info(dpy, scrnum, mode);
if (scrnum + 1 < numScreens)
printf("\n\n");
}
}
XCloseDisplay(dpy);
return 0;
}