diff options
Diffstat (limited to 'progs/xdemos/glxgears.c')
-rw-r--r-- | progs/xdemos/glxgears.c | 787 |
1 files changed, 0 insertions, 787 deletions
diff --git a/progs/xdemos/glxgears.c b/progs/xdemos/glxgears.c deleted file mode 100644 index 92c75caa5e..0000000000 --- a/progs/xdemos/glxgears.c +++ /dev/null @@ -1,787 +0,0 @@ -/* - * 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 - * - * See usage() below for command line options. - */ - - -#include <math.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <X11/Xlib.h> -#include <X11/keysym.h> -#include <GL/gl.h> -#include <GL/glx.h> -#include <GL/glxext.h> - -#ifndef GLX_MESA_swap_control -#define GLX_MESA_swap_control 1 -typedef int (*PFNGLXGETSWAPINTERVALMESAPROC)(void); -#endif - - -#define BENCHMARK - -#ifdef BENCHMARK - -/* XXX this probably isn't very portable */ - -#include <sys/time.h> -#include <unistd.h> - -/* return current time (in seconds) */ -static double -current_time(void) -{ - struct timeval tv; -#ifdef __VMS - (void) gettimeofday(&tv, NULL ); -#else - struct timezone tz; - (void) gettimeofday(&tv, &tz); -#endif - return (double) tv.tv_sec + tv.tv_usec / 1000000.0; -} - -#else /*BENCHMARK*/ - -/* dummy */ -static double -current_time(void) -{ - /* 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*/ - - - -#ifndef M_PI -#define M_PI 3.14159265 -#endif - - -/** Event handler results: */ -#define NOP 0 -#define EXIT 1 -#define DRAW 2 - -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 fullscreen = GL_FALSE; /* Create a single fullscreen window */ -static GLboolean stereo = GL_FALSE; /* Enable stereo. */ -static GLboolean animate = GL_TRUE; /* Animation */ -static GLfloat eyesep = 5.0; /* Eye separation. */ -static GLfloat fix_point = 40.0; /* Fixation point distance. */ -static GLfloat left, right, asp; /* Stereo frustum params. */ - - -/* - * - * 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) -{ - 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(); -} - - -static void -draw_gears(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); - 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); - draw(); - glPopMatrix(); - } - else { - draw(); - } -} - - -/** Draw single frame, do SwapBuffers, compute FPS */ -static void -draw_frame(Display *dpy, Window win) -{ - static int frames = 0; - static double tRot0 = -1.0, tRate0 = -1.0; - double dt, t = current_time(); - - if (tRot0 < 0.0) - tRot0 = t; - dt = t - tRot0; - tRot0 = t; - - if (animate) { - /* advance rotation for next frame */ - angle += 70.0 * dt; /* 70 degrees per second */ - if (angle > 3600.0) - angle -= 3600.0; - } - - draw_gears(); - glXSwapBuffers(dpy, win); - - frames++; - - 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); - tRate0 = t; - frames = 0; - } -} - - -/* new window size or exposure */ -static void -reshape(int width, int height) -{ - glViewport(0, 0, (GLint) width, (GLint) height); - - 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 -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); -} - - -/** - * Remove window border/decorations. - */ -static void -no_border( Display *dpy, Window w) -{ - static const unsigned MWM_HINTS_DECORATIONS = (1 << 1); - static const int PROP_MOTIF_WM_HINTS_ELEMENTS = 5; - - typedef struct - { - unsigned long flags; - unsigned long functions; - unsigned long decorations; - long inputMode; - unsigned long status; - } PropMotifWmHints; - - PropMotifWmHints motif_hints; - Atom prop, proptype; - unsigned long flags = 0; - - /* setup the property */ - motif_hints.flags = MWM_HINTS_DECORATIONS; - motif_hints.decorations = flags; - - /* get the atom for the property */ - prop = XInternAtom( dpy, "_MOTIF_WM_HINTS", True ); - if (!prop) { - /* something went wrong! */ - return; - } - - /* not sure this is correct, seems to work, XA_WM_HINTS didn't work */ - proptype = prop; - - XChangeProperty( dpy, w, /* display, window */ - prop, proptype, /* property, type */ - 32, /* format: 32-bit datums */ - PropModeReplace, /* mode */ - (unsigned char *) &motif_hints, /* data */ - PROP_MOTIF_WM_HINTS_ELEMENTS /* nelements */ - ); -} - - -/* - * 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 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; - Window root; - Window win; - GLXContext ctx; - XVisualInfo *visinfo; - - scrnum = DefaultScreen( dpy ); - root = RootWindow( dpy, scrnum ); - - 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) { - 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); - } - - /* window attributes */ - attr.background_pixel = 0; - attr.border_pixel = 0; - attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone); - attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask; - /* XXX this is a bad way to get a borderless window! */ - mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask; - - win = XCreateWindow( dpy, root, x, y, width, height, - 0, visinfo->depth, InputOutput, - visinfo->visual, mask, &attr ); - - if (fullscreen) - no_border(dpy, win); - - /* 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; -} - - -/** - * Determine whether or not a GLX extension is supported. - */ -static int -is_glx_extension_supported(Display *dpy, const char *query) -{ - const int scrnum = DefaultScreen(dpy); - const char *glx_extensions = NULL; - const size_t len = strlen(query); - const char *ptr; - - if (glx_extensions == NULL) { - glx_extensions = glXQueryExtensionsString(dpy, scrnum); - } - - ptr = strstr(glx_extensions, query); - return ((ptr != NULL) && ((ptr[len] == ' ') || (ptr[len] == '\0'))); -} - - -/** - * Attempt to determine whether or not the display is synched to vblank. - */ -static void -query_vsync(Display *dpy, GLXDrawable drawable) -{ - int interval = 0; - -#if defined(GLX_EXT_swap_control) - if (is_glx_extension_supported(dpy, "GLX_EXT_swap_control")) { - unsigned int tmp = -1; - glXQueryDrawable(dpy, drawable, GLX_SWAP_INTERVAL_EXT, &tmp); - interval = tmp; - } else -#endif - if (is_glx_extension_supported(dpy, "GLX_MESA_swap_control")) { - PFNGLXGETSWAPINTERVALMESAPROC pglXGetSwapIntervalMESA = - (PFNGLXGETSWAPINTERVALMESAPROC) - glXGetProcAddressARB((const GLubyte *) "glXGetSwapIntervalMESA"); - - interval = (*pglXGetSwapIntervalMESA)(); - } else if (is_glx_extension_supported(dpy, "GLX_SGI_swap_control")) { - /* The default swap interval with this extension is 1. Assume that it - * is set to the default. - * - * Many Mesa-based drivers default to 0, but all of these drivers also - * export GLX_MESA_swap_control. In that case, this branch will never - * be taken, and the correct result should be reported. - */ - interval = 1; - } - - - if (interval > 0) { - printf("Running synchronized to the vertical refresh. The framerate should be\n"); - if (interval == 1) { - printf("approximately the same as the monitor refresh rate.\n"); - } else if (interval > 1) { - printf("approximately 1/%d the monitor refresh rate.\n", - interval); - } - } -} - -/** - * Handle one X event. - * \return NOP, EXIT or DRAW - */ -static int -handle_event(Display *dpy, Window win, XEvent *event) -{ - (void) dpy; - (void) win; - - switch (event->type) { - case Expose: - return DRAW; - 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 EXIT; - } - else if (buffer[0] == 'a' || buffer[0] == 'A') { - animate = !animate; - } - } - return DRAW; - } - } - return NOP; -} - - -static void -event_loop(Display *dpy, Window win) -{ - while (1) { - int op; - while (!animate || XPending(dpy) > 0) { - XEvent event; - XNextEvent(dpy, &event); - op = handle_event(dpy, win, &event); - if (op == EXIT) - return; - else if (op == DRAW) - break; - } - - draw_frame(dpy, win); - } -} - - -static void -usage(void) -{ - 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"); - printf(" -geometry WxH+X+Y window geometry\n"); -} - - -int -main(int argc, char *argv[]) -{ - unsigned int winWidth = 300, winHeight = 300; - int x = 0, y = 0; - Display *dpy; - Window win; - GLXContext ctx; - char *dpyName = NULL; - GLboolean printInfo = GL_FALSE; - int i; - - for (i = 1; i < argc; i++) { - 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], "-stereo") == 0) { - stereo = GL_TRUE; - } - else if (strcmp(argv[i], "-fullscreen") == 0) { - fullscreen = GL_TRUE; - } - else if (i < argc-1 && strcmp(argv[i], "-geometry") == 0) { - XParseGeometry(argv[i+1], &x, &y, &winWidth, &winHeight); - i++; - } - else { - usage(); - return -1; - } - } - - dpy = XOpenDisplay(dpyName); - if (!dpy) { - printf("Error: couldn't open display %s\n", - dpyName ? dpyName : getenv("DISPLAY")); - return -1; - } - - make_window(dpy, "glxgears", x, y, winWidth, winHeight, &win, &ctx); - XMapWindow(dpy, win); - glXMakeCurrent(dpy, win, ctx); - query_vsync(dpy, win); - - 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)); - } - - 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); - glXMakeCurrent(dpy, None, NULL); - glXDestroyContext(dpy, ctx); - XDestroyWindow(dpy, win); - XCloseDisplay(dpy); - - return 0; -} |