From 50253ea0a3d9fb4a4f0436825cdb37616be6f238 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Mon, 8 Sep 2003 15:06:23 +0000 Subject: [PATCH] Remove all the swap_control stuff from glxgears demo (restored to vers 1.2). New glxswapcontrol.c file added. --- progs/xdemos/Makefile.X11 | 1 + progs/xdemos/glxgears.c | 339 +------------- progs/xdemos/glxswapcontrol.c | 824 ++++++++++++++++++++++++++++++++++ 3 files changed, 833 insertions(+), 331 deletions(-) create mode 100644 progs/xdemos/glxswapcontrol.c diff --git a/progs/xdemos/Makefile.X11 b/progs/xdemos/Makefile.X11 index 36fa9e57d07..264fc2491c5 100644 --- a/progs/xdemos/Makefile.X11 +++ b/progs/xdemos/Makefile.X11 @@ -17,6 +17,7 @@ PROGS = glthreads \ glxheads \ glxinfo \ glxpixmap \ + glxswapcontrol \ manywin \ offset \ pbinfo \ diff --git a/progs/xdemos/glxgears.c b/progs/xdemos/glxgears.c index da2ba1e1c52..59691513e2c 100644 --- a/progs/xdemos/glxgears.c +++ b/progs/xdemos/glxgears.c @@ -23,15 +23,9 @@ * 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 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 + * */ @@ -41,32 +35,12 @@ #include #include #include -#ifndef __VMS -# include -#endif -# define GLX_GLXEXT_PROTOTYPES #include #include -#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 */ @@ -74,8 +48,6 @@ PFNGLXGETFRAMEUSAGEMESAPROC get_frame_usage = NULL; #include #include -#define NUL '\0' - /* return current time (in seconds) */ static int current_time(void) @@ -112,16 +84,6 @@ 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; /* * @@ -265,65 +227,7 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width, 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); @@ -356,14 +260,12 @@ draw(void) 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); @@ -480,8 +382,6 @@ make_window( Display *dpy, const char *name, static void event_loop(Display *dpy, Window win) { - float frame_usage = 0.0; - while (1) { while (XPending(dpy) > 0) { XEvent event; @@ -526,13 +426,6 @@ event_loop(Display *dpy, Window win) 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 */ @@ -549,152 +442,16 @@ event_loop(Display *dpy, Window win) 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[]) { @@ -702,49 +459,17 @@ 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); @@ -757,59 +482,11 @@ 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" ); - 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(); diff --git a/progs/xdemos/glxswapcontrol.c b/progs/xdemos/glxswapcontrol.c new file mode 100644 index 00000000000..6a9a852e688 --- /dev/null +++ b/progs/xdemos/glxswapcontrol.c @@ -0,0 +1,824 @@ +/* + * 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 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 +#include +#include +#include +#include +#include +#ifndef __VMS +/*# include */ +#endif +# define GLX_GLXEXT_PROTOTYPES +#include +#include + +#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 +#include + +#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; +} -- 2.30.2