* 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.
+ * -info print GL implementation information
+ * -stereo use stereo enabled GLX visual
+ *
*/
#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
#define BENCHMARK
#include <sys/time.h>
#include <unistd.h>
-#define NUL '\0'
-
/* return current time (in seconds) */
-static int
+static double
current_time(void)
{
struct timeval tv;
struct timezone tz;
(void) gettimeofday(&tv, &tz);
#endif
- return (int) tv.tv_sec;
+ return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
}
#else /*BENCHMARK*/
/* dummy */
-static int
+static double
current_time(void)
{
- return 0;
+ /* update this function for other platforms! */
+ static double t = 0.0;
+ static int warn = 1;
+ if (warn) {
+ fprintf(stderr, "Warning: current_time() not implemented!!\n");
+ warn = 0;
+ }
+ return t += 1.0;
}
#endif /*BENCHMARK*/
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 fullscreen = GL_FALSE; /* Create a single fullscreen window */
+static GLboolean stereo = GL_FALSE; /* Enable stereo. */
+static GLfloat eyesep = 5.0; /* Eye separation. */
+static GLfloat fix_point = 40.0; /* Fixation point distance. */
+static GLfloat left, right, asp; /* Stereo frustum params. */
-static char ** extension_table = NULL;
-static unsigned num_extensions;
/*
*
static void
-draw(void)
+do_draw(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPopMatrix();
}
+static void
+draw(void)
+{
+ if (stereo) {
+ /* First left eye. */
+ glDrawBuffer(GL_BACK_LEFT);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glFrustum(left, right, -asp, asp, 5.0, 60.0);
+
+ glMatrixMode(GL_MODELVIEW);
+
+ glPushMatrix();
+ glTranslated(+0.5 * eyesep, 0.0, 0.0);
+ do_draw();
+ glPopMatrix();
+
+ /* Then right eye. */
+ glDrawBuffer(GL_BACK_RIGHT);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glFrustum(-right, -left, -asp, asp, 5.0, 60.0);
+
+ glMatrixMode(GL_MODELVIEW);
+
+ glPushMatrix();
+ glTranslated(-0.5 * eyesep, 0.0, 0.0);
+ do_draw();
+ glPopMatrix();
+ } else
+ do_draw();
+}
+
/* new window size or exposure */
static void
reshape(int width, int height)
{
- GLfloat h = (GLfloat) height / (GLfloat) width;
-
glViewport(0, 0, (GLint) width, (GLint) height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
+
+ if (stereo) {
+ GLfloat w;
+
+ asp = (GLfloat) height / (GLfloat) width;
+ w = fix_point * (1.0 / 5.0);
+
+ left = -5.0 * ((w - 0.5 * eyesep) / fix_point);
+ right = 5.0 * ((w + 0.5 * eyesep) / fix_point);
+ } else {
+ GLfloat h = (GLfloat) height / (GLfloat) width;
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
+ }
+
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -40.0);
}
+
static void
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 attribs[] = { GLX_RGBA,
+ GLX_RED_SIZE, 1,
+ GLX_GREEN_SIZE, 1,
+ GLX_BLUE_SIZE, 1,
+ GLX_DOUBLEBUFFER,
+ GLX_DEPTH_SIZE, 1,
+ None };
+ int stereoAttribs[] = { GLX_RGBA,
+ GLX_RED_SIZE, 1,
+ GLX_GREEN_SIZE, 1,
+ GLX_BLUE_SIZE, 1,
+ GLX_DOUBLEBUFFER,
+ GLX_DEPTH_SIZE, 1,
+ GLX_STEREO,
+ None };
int scrnum;
XSetWindowAttributes attr;
unsigned long mask;
scrnum = DefaultScreen( dpy );
root = RootWindow( dpy, scrnum );
- visinfo = glXChooseVisual( dpy, scrnum, attrib );
+ if (fullscreen) {
+ x = 0; y = 0;
+ width = DisplayWidth( dpy, scrnum );
+ height = DisplayHeight( dpy, scrnum );
+ }
+
+ if (stereo)
+ visinfo = glXChooseVisual( dpy, scrnum, stereoAttribs );
+ else
+ visinfo = glXChooseVisual( dpy, scrnum, attribs );
if (!visinfo) {
- printf("Error: couldn't get an RGB, Double-buffered visual\n");
+ if (stereo) {
+ printf("Error: couldn't get an RGB, "
+ "Double-buffered, Stereo visual\n");
+ } else
+ printf("Error: couldn't get an RGB, Double-buffered visual\n");
exit(1);
}
attr.border_pixel = 0;
attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
- mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+ attr.override_redirect = fullscreen;
+ mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
win = XCreateWindow( dpy, root, 0, 0, width, height,
0, visinfo->depth, InputOutput,
}
}
- /* next frame */
- angle += 2.0;
-
- draw();
- glXSwapBuffers(dpy, win);
-
- /* calc framerate */
{
- static int t0 = -1;
static int frames = 0;
- int t = current_time();
+ static double tRot0 = -1.0, tRate0 = -1.0;
+ double dt, t = current_time();
+ if (tRot0 < 0.0)
+ tRot0 = t;
+ dt = t - tRot0;
+ tRot0 = t;
+
+ /* advance rotation for next frame */
+ angle += 70.0 * dt; /* 70 degrees per second */
+ if (angle > 3600.0)
+ angle -= 3600.0;
- if (t0 < 0)
- t0 = t;
+ draw();
+ glXSwapBuffers(dpy, win);
frames++;
- if (t - t0 >= 5.0) {
- GLfloat seconds = t - t0;
+ if (tRate0 < 0.0)
+ tRate0 = t;
+ if (t - tRate0 >= 5.0) {
+ GLfloat seconds = t - tRate0;
GLfloat fps = frames / seconds;
printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
fps);
- t0 = t;
+ tRate0 = t;
frames = 0;
}
}
}
-/**
- * Display the refresh rate of the display using the GLX_OML_sync_control
- * extension.
- */
-
-static void
-show_refresh_rate( Display * dpy )
-{
-#ifdef GLX_OML_sync_control
- 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 )
+usage(void)
{
- 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;
+ printf("Usage:\n");
+ printf(" -display <displayname> set the display to run on\n");
+ printf(" -stereo run in stereo mode\n");
+ printf(" -fullscreen run in fullscreen mode\n");
+ printf(" -info display OpenGL renderer info\n");
}
-
-
-/**
- * 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[])
{
+ const int winWidth = 300, winHeight = 300;
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;
+ char *dpyName = NULL;
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) {
+ if (strcmp(argv[i], "-display") == 0) {
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], "-stereo") == 0) {
+ stereo = GL_TRUE;
}
- 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], "-fullscreen") == 0) {
+ fullscreen = 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;
+ else {
+ usage();
+ return -1;
}
}
dpy = XOpenDisplay(dpyName);
if (!dpy) {
- printf("Error: couldn't open display %s\n", dpyName);
+ printf("Error: couldn't open display %s\n",
+ dpyName ? dpyName : getenv("DISPLAY"));
return -1;
}
- make_window(dpy, "glxgears", 0, 0, 300, 300, &win, &ctx);
+ make_window(dpy, "glxgears", 0, 0, winWidth, winHeight, &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" );
-
- 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 (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();
+ /* Set initial projection/viewing transformation.
+ * We can't be sure we'll get a ConfigureNotify event when the window
+ * first appears.
+ */
+ reshape(winWidth, winHeight);
+
event_loop(dpy, win);
+ glDeleteLists(gear1, 1);
+ glDeleteLists(gear2, 1);
+ glDeleteLists(gear3, 1);
glXDestroyContext(dpy, ctx);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
projects / mesa.git / blobdiff