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xenocara/dist/Mesa/progs/xdemos/glxswapcontrol.c
matthieu 8c9bfd57b8 Import MesaDemos 6.5.1
2006-11-25 18:56:37 +00:00

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/*
* Copyright (C) 1999-2001 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.
*/
/*
* This is a port of the infamous "gears" demo to straight GLX (i.e. no GLUT)
* Port by Brian Paul 23 March 2001
*
* Modified by Ian Romanick <idr@us.ibm.com> 09 April 2003 to support
* GLX_{MESA,SGI}_swap_control and GLX_OML_sync_control.
*
* Command line options:
* -display Name of the display to use.
* -info print GL implementation information
* -swap N Attempt to set the swap interval to 1/N second
* -forcegetrate Get the display refresh rate even if the required GLX
* extension is not supported.
*/
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#ifndef __VMS
/*# include <stdint.h>*/
#endif
# define GLX_GLXEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glx.h>
#ifndef GLX_MESA_swap_control
typedef GLint ( * PFNGLXSWAPINTERVALMESAPROC) (unsigned interval);
typedef GLint ( * PFNGLXGETSWAPINTERVALMESAPROC) ( void );
#endif
#if !defined( GLX_OML_sync_control ) && defined( _STDINT_H )
#define GLX_OML_sync_control 1
typedef Bool ( * PFNGLXGETMSCRATEOMLPROC) (Display *dpy, GLXDrawable drawable, int32_t *numerator, int32_t *denominator);
#endif
#ifndef GLX_MESA_swap_frame_usage
#define GLX_MESA_swap_frame_usage 1
typedef int ( * PFNGLXGETFRAMEUSAGEMESAPROC) (Display *dpy, GLXDrawable drawable, float * usage );
#endif
#define BENCHMARK
PFNGLXGETFRAMEUSAGEMESAPROC get_frame_usage = NULL;
#ifdef BENCHMARK
/* XXX this probably isn't very portable */
#include <sys/time.h>
#include <unistd.h>
#define NUL '\0'
/* return current time (in seconds) */
static int
current_time(void)
{
struct timeval tv;
#ifdef __VMS
(void) gettimeofday(&tv, NULL );
#else
struct timezone tz;
(void) gettimeofday(&tv, &tz);
#endif
return (int) tv.tv_sec;
}
#else /*BENCHMARK*/
/* dummy */
static int
current_time(void)
{
return 0;
}
#endif /*BENCHMARK*/
#ifndef M_PI
#define M_PI 3.14159265
#endif
static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
static GLint gear1, gear2, gear3;
static GLfloat angle = 0.0;
static GLboolean has_OML_sync_control = GL_FALSE;
static GLboolean has_SGI_swap_control = GL_FALSE;
static GLboolean has_MESA_swap_control = GL_FALSE;
static GLboolean has_MESA_swap_frame_usage = GL_FALSE;
static char ** extension_table = NULL;
static unsigned num_extensions;
static GLboolean use_ztrick = GL_FALSE;
static GLfloat aspect;
/*
*
* Draw a gear wheel. You'll probably want to call this function when
* building a display list since we do a lot of trig here.
*
* Input: inner_radius - radius of hole at center
* outer_radius - radius at center of teeth
* width - width of gear
* teeth - number of teeth
* tooth_depth - depth of tooth
*/
static void
gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
GLint teeth, GLfloat tooth_depth)
{
GLint i;
GLfloat r0, r1, r2;
GLfloat angle, da;
GLfloat u, v, len;
r0 = inner_radius;
r1 = outer_radius - tooth_depth / 2.0;
r2 = outer_radius + tooth_depth / 2.0;
da = 2.0 * M_PI / teeth / 4.0;
glShadeModel(GL_FLAT);
glNormal3f(0.0, 0.0, 1.0);
/* draw front face */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
if (i < teeth) {
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
}
}
glEnd();
/* draw front sides of teeth */
glBegin(GL_QUADS);
da = 2.0 * M_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
}
glEnd();
glNormal3f(0.0, 0.0, -1.0);
/* draw back face */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
if (i < teeth) {
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
}
}
glEnd();
/* draw back sides of teeth */
glBegin(GL_QUADS);
da = 2.0 * M_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
-width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
}
glEnd();
/* draw outward faces of teeth */
glBegin(GL_QUAD_STRIP);
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
u = r2 * cos(angle + da) - r1 * cos(angle);
v = r2 * sin(angle + da) - r1 * sin(angle);
len = sqrt(u * u + v * v);
u /= len;
v /= len;
glNormal3f(v, -u, 0.0);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
-width * 0.5);
u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
glNormal3f(v, -u, 0.0);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
}
glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
glEnd();
glShadeModel(GL_SMOOTH);
/* draw inside radius cylinder */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glNormal3f(-cos(angle), -sin(angle), 0.0);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
}
glEnd();
}
static void
draw(void)
{
if ( use_ztrick ) {
static GLboolean flip = GL_FALSE;
static const GLfloat vert[4][3] = {
{ -1, -1, -0.999 },
{ 1, -1, -0.999 },
{ 1, 1, -0.999 },
{ -1, 1, -0.999 }
};
static const GLfloat col[4][3] = {
{ 1.0, 0.6, 0.0 },
{ 1.0, 0.6, 0.0 },
{ 0.0, 0.0, 0.0 },
{ 0.0, 0.0, 0.0 },
};
if ( flip ) {
glDepthRange(0, 0.5);
glDepthFunc(GL_LEQUAL);
}
else {
glDepthRange(1.0, 0.4999);
glDepthFunc(GL_GEQUAL);
}
flip = !flip;
/* The famous Quake "Z trick" only works when the whole screen is
* re-drawn each frame.
*/
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1, 1, -1, 1, -1, 1);
glDisable(GL_LIGHTING);
glShadeModel(GL_SMOOTH);
glEnable( GL_VERTEX_ARRAY );
glEnable( GL_COLOR_ARRAY );
glVertexPointer( 3, GL_FLOAT, 0, vert );
glColorPointer( 3, GL_FLOAT, 0, col );
glDrawArrays( GL_POLYGON, 0, 4 );
glDisable( GL_COLOR_ARRAY );
glDisable( GL_VERTEX_ARRAY );
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -aspect, aspect, 5.0, 60.0);
glEnable(GL_LIGHTING);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -40.0);
}
else {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
glPushMatrix();
glRotatef(view_rotx, 1.0, 0.0, 0.0);
glRotatef(view_roty, 0.0, 1.0, 0.0);
glRotatef(view_rotz, 0.0, 0.0, 1.0);
glPushMatrix();
glTranslatef(-3.0, -2.0, 0.0);
glRotatef(angle, 0.0, 0.0, 1.0);
glCallList(gear1);
glPopMatrix();
glPushMatrix();
glTranslatef(3.1, -2.0, 0.0);
glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
glCallList(gear2);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.1, 4.2, 0.0);
glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
glCallList(gear3);
glPopMatrix();
glPopMatrix();
}
/* new window size or exposure */
static void
reshape(int width, int height)
{
aspect = (GLfloat) height / (GLfloat) width;
glViewport(0, 0, (GLint) width, (GLint) height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -aspect, aspect, 5.0, 60.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -40.0);
}
static void
init(void)
{
static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glEnable(GL_CULL_FACE);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
/* make the gears */
gear1 = glGenLists(1);
glNewList(gear1, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
gear(1.0, 4.0, 1.0, 20, 0.7);
glEndList();
gear2 = glGenLists(1);
glNewList(gear2, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
gear(0.5, 2.0, 2.0, 10, 0.7);
glEndList();
gear3 = glGenLists(1);
glNewList(gear3, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
gear(1.3, 2.0, 0.5, 10, 0.7);
glEndList();
glEnable(GL_NORMALIZE);
}
/*
* Create an RGB, double-buffered window.
* Return the window and context handles.
*/
static void
make_window( Display *dpy, const char *name,
int x, int y, int width, int height,
Window *winRet, GLXContext *ctxRet)
{
int attrib[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
GLX_DEPTH_SIZE, 1,
None };
int scrnum;
XSetWindowAttributes attr;
unsigned long mask;
Window root;
Window win;
GLXContext ctx;
XVisualInfo *visinfo;
scrnum = DefaultScreen( dpy );
root = RootWindow( dpy, scrnum );
visinfo = glXChooseVisual( dpy, scrnum, attrib );
if (!visinfo) {
printf("Error: couldn't get an RGB, Double-buffered visual\n");
exit(1);
}
/* window attributes */
attr.background_pixel = 0;
attr.border_pixel = 0;
attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
win = XCreateWindow( dpy, root, 0, 0, width, height,
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr );
/* set hints and properties */
{
XSizeHints sizehints;
sizehints.x = x;
sizehints.y = y;
sizehints.width = width;
sizehints.height = height;
sizehints.flags = USSize | USPosition;
XSetNormalHints(dpy, win, &sizehints);
XSetStandardProperties(dpy, win, name, name,
None, (char **)NULL, 0, &sizehints);
}
ctx = glXCreateContext( dpy, visinfo, NULL, True );
if (!ctx) {
printf("Error: glXCreateContext failed\n");
exit(1);
}
XFree(visinfo);
*winRet = win;
*ctxRet = ctx;
}
static void
event_loop(Display *dpy, Window win)
{
float frame_usage = 0.0;
while (1) {
while (XPending(dpy) > 0) {
XEvent event;
XNextEvent(dpy, &event);
switch (event.type) {
case Expose:
/* we'll redraw below */
break;
case ConfigureNotify:
reshape(event.xconfigure.width, event.xconfigure.height);
break;
case KeyPress:
{
char buffer[10];
int r, code;
code = XLookupKeysym(&event.xkey, 0);
if (code == XK_Left) {
view_roty += 5.0;
}
else if (code == XK_Right) {
view_roty -= 5.0;
}
else if (code == XK_Up) {
view_rotx += 5.0;
}
else if (code == XK_Down) {
view_rotx -= 5.0;
}
else {
r = XLookupString(&event.xkey, buffer, sizeof(buffer),
NULL, NULL);
if (buffer[0] == 27) {
/* escape */
return;
}
}
}
}
}
/* next frame */
angle += 2.0;
draw();
if ( get_frame_usage != NULL ) {
GLfloat temp;
(*get_frame_usage)( dpy, win, & temp );
frame_usage += temp;
}
glXSwapBuffers(dpy, win);
/* calc framerate */
{
static int t0 = -1;
static int frames = 0;
int t = current_time();
if (t0 < 0)
t0 = t;
frames++;
if (t - t0 >= 5.0) {
GLfloat seconds = t - t0;
GLfloat fps = frames / seconds;
if ( get_frame_usage != NULL ) {
printf("%d frames in %3.1f seconds = %6.3f FPS (%3.1f%% usage)\n",
frames, seconds, fps,
(frame_usage * 100.0) / (float) frames );
}
else {
printf("%d frames in %3.1f seconds = %6.3f FPS\n",
frames, seconds, fps);
}
t0 = t;
frames = 0;
frame_usage = 0.0;
}
}
}
}
/**
* Display the refresh rate of the display using the GLX_OML_sync_control
* extension.
*/
static void
show_refresh_rate( Display * dpy )
{
#if defined(GLX_OML_sync_control) && defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
PFNGLXGETMSCRATEOMLPROC get_msc_rate;
int32_t n;
int32_t d;
get_msc_rate = (PFNGLXGETMSCRATEOMLPROC) glXGetProcAddressARB( (const GLubyte *) "glXGetMscRateOML" );
if ( get_msc_rate != NULL ) {
(*get_msc_rate)( dpy, glXGetCurrentDrawable(), &n, &d );
printf( "refresh rate: %.1fHz\n", (float) n / d );
return;
}
#endif
printf( "glXGetMscRateOML not supported.\n" );
}
/**
* Fill in the table of extension strings from a supplied extensions string
* (as returned by glXQueryExtensionsString).
*
* \param string String of GLX extensions.
* \sa is_extension_supported
*/
static void
make_extension_table( const char * string )
{
char ** string_tab;
unsigned num_strings;
unsigned base;
unsigned idx;
unsigned i;
/* Count the number of spaces in the string. That gives a base-line
* figure for the number of extension in the string.
*/
num_strings = 1;
for ( i = 0 ; string[i] != NUL ; i++ ) {
if ( string[i] == ' ' ) {
num_strings++;
}
}
string_tab = (char **) malloc( sizeof( char * ) * num_strings );
if ( string_tab == NULL ) {
return;
}
base = 0;
idx = 0;
while ( string[ base ] != NUL ) {
/* Determine the length of the next extension string.
*/
for ( i = 0
; (string[ base + i ] != NUL) && (string[ base + i ] != ' ')
; i++ ) {
/* empty */ ;
}
if ( i > 0 ) {
/* If the string was non-zero length, add it to the table. We
* can get zero length strings if there is a space at the end of
* the string or if there are two (or more) spaces next to each
* other in the string.
*/
string_tab[ idx ] = malloc( sizeof( char ) * (i + 1) );
if ( string_tab[ idx ] == NULL ) {
return;
}
(void) memcpy( string_tab[ idx ], & string[ base ], i );
string_tab[ idx ][i] = NUL;
idx++;
}
/* Skip to the start of the next extension string.
*/
for ( base += i
; (string[ base ] == ' ') && (string[ base ] != NUL)
; base++ ) {
/* empty */ ;
}
}
extension_table = string_tab;
num_extensions = idx;
}
/**
* Determine of an extension is supported. The extension string table
* must have already be initialized by calling \c make_extension_table.
*
* \praram ext Extension to be tested.
* \return GL_TRUE of the extension is supported, GL_FALSE otherwise.
* \sa make_extension_table
*/
static GLboolean
is_extension_supported( const char * ext )
{
unsigned i;
for ( i = 0 ; i < num_extensions ; i++ ) {
if ( strcmp( ext, extension_table[i] ) == 0 ) {
return GL_TRUE;
}
}
return GL_FALSE;
}
int
main(int argc, char *argv[])
{
Display *dpy;
Window win;
GLXContext ctx;
char *dpyName = ":0";
int swap_interval = 1;
GLboolean do_swap_interval = GL_FALSE;
GLboolean force_get_rate = GL_FALSE;
GLboolean printInfo = GL_FALSE;
int i;
PFNGLXSWAPINTERVALMESAPROC set_swap_interval = NULL;
PFNGLXGETSWAPINTERVALMESAPROC get_swap_interval = NULL;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
dpyName = argv[i+1];
i++;
}
else if (strcmp(argv[i], "-info") == 0) {
printInfo = GL_TRUE;
}
else if (strcmp(argv[i], "-swap") == 0 && i + 1 < argc) {
swap_interval = atoi( argv[i+1] );
do_swap_interval = GL_TRUE;
i++;
}
else if (strcmp(argv[i], "-forcegetrate") == 0) {
/* This option was put in because some DRI drivers don't support the
* full GLX_OML_sync_control extension, but they do support
* glXGetMscRateOML.
*/
force_get_rate = GL_TRUE;
}
else if (strcmp(argv[i], "-ztrick") == 0) {
use_ztrick = GL_TRUE;
}
else if (strcmp(argv[i], "-help") == 0) {
printf("Usage:\n");
printf(" gears [options]\n");
printf("Options:\n");
printf(" -help Print this information\n");
printf(" -display displayName Specify X display\n");
printf(" -info Display GL information\n");
printf(" -swap N Swap no more than once per N vertical refreshes\n");
printf(" -forcegetrate Try to use glXGetMscRateOML function\n");
return 0;
}
}
dpy = XOpenDisplay(dpyName);
if (!dpy) {
printf("Error: couldn't open display %s\n", dpyName);
return -1;
}
make_window(dpy, "glxgears", 0, 0, 300, 300, &win, &ctx);
XMapWindow(dpy, win);
glXMakeCurrent(dpy, win, ctx);
make_extension_table( (char *) glXQueryExtensionsString(dpy,DefaultScreen(dpy)) );
has_OML_sync_control = is_extension_supported( "GLX_OML_sync_control" );
has_SGI_swap_control = is_extension_supported( "GLX_SGI_swap_control" );
has_MESA_swap_control = is_extension_supported( "GLX_MESA_swap_control" );
has_MESA_swap_frame_usage = is_extension_supported( "GLX_MESA_swap_frame_usage" );
if ( has_MESA_swap_control ) {
set_swap_interval = (PFNGLXSWAPINTERVALMESAPROC) glXGetProcAddressARB( (const GLubyte *) "glXSwapIntervalMESA" );
get_swap_interval = (PFNGLXGETSWAPINTERVALMESAPROC) glXGetProcAddressARB( (const GLubyte *) "glXGetSwapIntervalMESA" );
}
else if ( has_SGI_swap_control ) {
set_swap_interval = (PFNGLXSWAPINTERVALMESAPROC) glXGetProcAddressARB( (const GLubyte *) "glXSwapIntervalSGI" );
}
if ( has_MESA_swap_frame_usage ) {
get_frame_usage = (PFNGLXGETFRAMEUSAGEMESAPROC) glXGetProcAddressARB( (const GLubyte *) "glXGetFrameUsageMESA" );
}
if (printInfo) {
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
if ( has_OML_sync_control || force_get_rate ) {
show_refresh_rate( dpy );
}
if ( get_swap_interval != NULL ) {
printf("Default swap interval = %d\n", (*get_swap_interval)() );
}
}
if ( do_swap_interval ) {
if ( set_swap_interval != NULL ) {
if ( ((swap_interval == 0) && !has_MESA_swap_control)
|| (swap_interval < 0) ) {
printf( "Swap interval must be non-negative or greater than zero "
"if GLX_MESA_swap_control is not supported.\n" );
}
else {
(*set_swap_interval)( swap_interval );
}
if ( printInfo && (get_swap_interval != NULL) ) {
printf("Current swap interval = %d\n", (*get_swap_interval)() );
}
}
else {
printf("Unable to set swap-interval. Neither GLX_SGI_swap_control "
"nor GLX_MESA_swap_control are supported.\n" );
}
}
init();
event_loop(dpy, win);
glXDestroyContext(dpy, ctx);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
return 0;
}
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