* 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
+ *
*/
#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)
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;
/*
*
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);
- }
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(view_rotx, 1.0, 0.0, 0.0);
static void
reshape(int width, int height)
{
- aspect = (GLfloat) height / (GLfloat) width;
+ GLfloat h = (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);
+ glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -40.0);
static void
event_loop(Display *dpy, Window win)
{
- float frame_usage = 0.0;
-
while (1) {
while (XPending(dpy) > 0) {
XEvent event;
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 */
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);
- }
-
+ 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 )
-{
-#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[])
{
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) {
+ 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], "-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);
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();
--- /dev/null
+/*
+ * 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 )
+{
+#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[])
+{
+ 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;
+}
projects / mesa.git / commitdiff