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-rw-r--r--progs/xdemos/glxgears.c229
1 files changed, 226 insertions, 3 deletions
diff --git a/progs/xdemos/glxgears.c b/progs/xdemos/glxgears.c
index 59691513e2c..40d2f2fc3d9 100644
--- a/progs/xdemos/glxgears.c
+++ b/progs/xdemos/glxgears.c
@@ -23,9 +23,15 @@
* This is a port of the infamous "gears" demo to straight GLX (i.e. no GLUT)
* Port by Brian Paul 23 March 2001
*
- * Command line options:
- * -info print GL implementation information
+ * Modified by Ian Romanick <[email protected]> 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.
*/
@@ -35,9 +41,20 @@
#include <string.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
+#include <stdint.h>
+#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
@@ -48,6 +65,8 @@
#include <sys/time.h>
#include <unistd.h>
+#define NUL '\0'
+
/* return current time (in seconds) */
static int
current_time(void)
@@ -84,6 +103,12 @@ 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 char ** extension_table = NULL;
+static unsigned num_extensions;
/*
*
@@ -452,6 +477,133 @@ event_loop(Display *dpy, Window win)
}
+/**
+ * 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 )
+{
+ 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[])
{
@@ -459,17 +611,46 @@ main(int argc, char *argv[])
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) {
+ 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], "-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(" -forcgetrate Try to use glXGetMscRateOML function\n");
+ return 0;
+ }
}
dpy = XOpenDisplay(dpyName);
@@ -482,11 +663,53 @@ main(int argc, char *argv[])
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();
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