diff options
| -rw-r--r-- | progs/xdemos/glxgears.c | 196 |
1 files changed, 121 insertions, 75 deletions
diff --git a/progs/xdemos/glxgears.c b/progs/xdemos/glxgears.c index 75d63e51a2..c98c3157b5 100644 --- a/progs/xdemos/glxgears.c +++ b/progs/xdemos/glxgears.c @@ -88,12 +88,18 @@ current_time(void) #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. */ @@ -239,7 +245,7 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width, static void -do_draw(void) +draw(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); @@ -269,8 +275,9 @@ do_draw(void) glPopMatrix(); } + static void -draw(void) +draw_gears(void) { if (stereo) { /* First left eye. */ @@ -284,7 +291,7 @@ draw(void) glPushMatrix(); glTranslated(+0.5 * eyesep, 0.0, 0.0); - do_draw(); + draw(); glPopMatrix(); /* Then right eye. */ @@ -298,10 +305,50 @@ draw(void) glPushMatrix(); glTranslated(-0.5 * eyesep, 0.0, 0.0); - do_draw(); + draw(); glPopMatrix(); - } else - do_draw(); + } + 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; + } } @@ -319,7 +366,8 @@ reshape(int width, int height) left = -5.0 * ((w - 0.5 * eyesep) / fix_point); right = 5.0 * ((w + 0.5 * eyesep) / fix_point); - } else { + } + else { GLfloat h = (GLfloat) height / (GLfloat) width; glMatrixMode(GL_PROJECTION); @@ -430,10 +478,11 @@ make_window( Display *dpy, const char *name, 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! */ attr.override_redirect = fullscreen; mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect; - win = XCreateWindow( dpy, root, 0, 0, width, height, + win = XCreateWindow( dpy, root, x, y, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr ); @@ -463,79 +512,70 @@ make_window( Display *dpy, const char *name, } +/** + * Handle one X event. + * \return NOP, EXIT or DRAW + */ +static int +handle_event(Display *dpy, Window win, XEvent *event) +{ + 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) { - while (XPending(dpy) > 0) { + int op; + while (!animate || 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; - } - } - } - } + op = handle_event(dpy, win, &event); + if (op == EXIT) + return; + else if (op == DRAW) + break; } - { - 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; - - /* advance rotation for next frame */ - angle += 70.0 * dt; /* 70 degrees per second */ - if (angle > 3600.0) - angle -= 3600.0; - - draw(); - 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; - } - } + draw_frame(dpy, win); } } @@ -548,13 +588,15 @@ usage(void) 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[]) { - const int winWidth = 300, winHeight = 300; + unsigned int winWidth = 300, winHeight = 300; + int x = 0, y = 0; Display *dpy; Window win; GLXContext ctx; @@ -576,6 +618,10 @@ main(int argc, char *argv[]) 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; @@ -589,7 +635,7 @@ main(int argc, char *argv[]) return -1; } - make_window(dpy, "glxgears", 0, 0, winWidth, winHeight, &win, &ctx); + make_window(dpy, "glxgears", x, y, winWidth, winHeight, &win, &ctx); XMapWindow(dpy, win); glXMakeCurrent(dpy, win, ctx); |