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#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/cursorfont.h>
#define ENABLE_X11_SHARED_MEMORY_PIXMAPS
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/time.h>
#include <X11/extensions/XShm.h>
static int UsingSharedMemoryPixmaps = 0;
#endif
#include <assert.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include "Gfx.h"
#include "Vector.h"
#include "Movie.h"
#define NIL (0)
#define EVENT_MASK ( ExposureMask | \
KeyPressMask | \
ButtonPressMask | \
ButtonReleaseMask | \
ButtonMotionMask)
/*** global data ***/
static Display * dpy;
static Visual vis;
static unsigned int blackColor;
static unsigned int whiteColor;
static Window win;
static XEvent e;
static GC gc;
static XImage * image;
static void * offscreen = (void*)0;
static int mydepth;
static signed int startx, starty;
static int width = 400, height = 400;
/*** End of global data ***/
void redraw(void) {
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
if( UsingSharedMemoryPixmaps ) {
XShmPutImage( dpy, win, gc, image, 0, 0, 0, 0, width, height, 0 );
} else {
#endif
XPutImage ( dpy, win, gc, image, 0, 0, 0, 0, width, height );
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
}
#endif
}
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
XShmSegmentInfo * shminfo;
#endif
void handle_signal( int sig ) {
if( sig == SIGINT ) {
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
shmdt( shminfo->shmaddr );
shmctl( shminfo->shmid, IPC_RMID, 0);
#endif
fputs( "Exit\n", stderr);
exit( 0 );
}
if( sig == SIGALRM ) {
if( !Movie_checkframe( ) ) {
Vector_paint();
redraw();
}
}
}
/*** main() ***/
int main(int argc, char **argv) {
char x11_keychar; /* gedrueckte taste */
KeySym key; /* metadaten beim tastendruecken */
int shallredraw = 0;
Cursor curs;
struct itimerval ticks;
signal( SIGINT, handle_signal );
signal( SIGALRM, handle_signal );
Vector_init( 5, 300);
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
shminfo = malloc( sizeof( shminfo ));
#endif
if( (dpy = XOpenDisplay(NIL)) == NULL ) {
fputs( "Can't XOpenDisplay\n", stderr );
exit( 0 );
}
win = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, width, height, 0, blackColor, blackColor);
/*** We want to get MapNotify events ***/
XSelectInput(dpy, win, StructureNotifyMask);
/*** "Map" the window (that is, make it appear on the screen) ***/
XMapWindow(dpy, win);
/*** Create a "Graphics Context" ***/
gc = XCreateGC(dpy, win, 0, NIL);
/*** Wait for the MapNotify event ***/
for(;;) {
XNextEvent(dpy, &e);
if (e.type == MapNotify)
break;
}
curs = XCreateFontCursor(dpy, 39);
XDefineCursor( dpy, win, curs );
switch ( mydepth = DefaultDepth(dpy, DefaultScreen(dpy)) ) {
case 24:
case 32:
break;
default:
fputs( "Screen Resolution Aua\n", stderr );
exit( 0 );
break;
}
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
{
int major, minor;
Bool pixmaps;
if( XShmQueryVersion( dpy, &major, &minor, &pixmaps) && pixmaps ) {
UsingSharedMemoryPixmaps = 1;
if((image = XShmCreateImage( dpy, CopyFromParent, DefaultDepth(dpy, DefaultScreen(dpy)), ZPixmap, NULL, shminfo, width, height )) == NULL ) {
fputs( "Can't XShmCreateImage\n", stderr );
exit( 0 );
}
shminfo->shmid = shmget( IPC_PRIVATE, image->bytes_per_line * image->height, IPC_CREAT | 0777 );
shminfo->shmaddr = offscreen = image->data = shmat( shminfo->shmid, 0, 0);
shminfo->readOnly= 0;
if( XShmAttach( dpy, shminfo ) == NULL ) {
fputs( "Can't XShmAttach\n", stderr );
exit( 0 );
}
} else {
#endif
if( ( image = XCreateImage( dpy, CopyFromParent, DefaultDepth(dpy, DefaultScreen(dpy)), ZPixmap, 0, offscreen, width, height, 32, 0 ) ) == NULL ) {
fputs( "Can't XCreateImage\n", stderr );
exit( 0 );
}
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
}
}
#endif
Gfx_init(offscreen, width, height);
Vector_paint();
/*** draw application***/
redraw();
/*** select events ***/
XSelectInput(dpy, win, EVENT_MASK);
ticks.it_value.tv_sec = 0;
ticks.it_value.tv_usec = 1000 * 40;
ticks.it_interval.tv_sec = 0;
ticks.it_interval.tv_usec = 1000 * 40;
setitimer( ITIMER_REAL, &ticks, (struct itimerval*)0);
while(1) {
XNextEvent(dpy, &e);
switch(e.type) {
case ConfigureNotify:
/* fprintf(stderr, "window resized\n"); */
break;
case Expose:
if(e.xexpose.count == 0) {
redraw();
}
break;
case MotionNotify:
Vector_move( startx - ((XButtonEvent*)&e)->x, starty - ((XButtonEvent*)&e)->y );
shallredraw = 1;
/* Fall through */
case ButtonPress:
startx = ((XButtonEvent*)&e)->x;
starty = ((XButtonEvent*)&e)->y;
break;
case KeyPress:
/* fprintf(stderr, "got keypress-event\n"); */
/*** klarheit verschaffen ***/
XLookupString((XKeyEvent *)&e, &x11_keychar, 1, &key, NULL);
switch((int)key) {
case 'q':
Vector_angle( -0.01, 0, 0);
shallredraw = 1;
break;
case 'w':
Vector_angle( +0.01, 0, 0);
shallredraw = 1;
break;
case 'a':
Vector_angle( 0, -0.01, 0);
shallredraw = 1;
break;
case 's':
Vector_angle( 0, +0.01, 0);
shallredraw = 1;
break;
case 'y':
Vector_angle( 0, 0, -0.01);
shallredraw = 1;
break;
case 'x':
Vector_angle( 0, 0, +0.01);
shallredraw = 1;
break;
case 'c':
Vector_reset( );
shallredraw = 1;
break;
default:
break;
}
default:
break;
}
if( shallredraw == 1 ) {
Vector_paint();
redraw();
shallredraw = 0;
}
}
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
XShmDetach( dpy, shminfo);
#endif
XDestroyImage( image );
#ifdef ENABLE_X11_SHARED_MEMORY_PIXMAPS
shmdt( shminfo->shmaddr );
shmctl( shminfo->shmid, IPC_RMID, 0);
#endif
}
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