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#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <GL/glx.h>
#include <GL/gl.h>
#include "ui.h"
#ifndef M_PI
# define M_PI 3.14159265
#endif
static int attributeList[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
static Bool WaitForNotify(Display *d, XEvent *e, char *arg)
{
return (e->type == MapNotify) && (e->xmap.window == (Window)arg);
}
Display *dpy;
Window win;
void tkSwapBuffers(void)
{
glXSwapBuffers(dpy,win);
}
int ui_loop(int argc, char **argv, const char *name)
{
XVisualInfo *vi;
Colormap cmap;
XSetWindowAttributes swa;
XSizeHints hint;
GLXContext cx;
XEvent event;
int k, width, height;
char buf[80];
XEvent xev;
KeySym keysym;
XComposeStatus status;
/* get a connection */
dpy = XOpenDisplay(NULL);
if (dpy == NULL) {
fprintf(stderr,"Could not open X display\n");
exit(1);
}
/* get an appropriate visual */
vi = glXChooseVisual(dpy, DefaultScreen(dpy), attributeList);
if (vi == NULL) {
fprintf(stderr, "No suitable visual for glx\n");
exit(1);
}
/* create a GLX context */
cx = glXCreateContext(dpy, vi, 0, GL_TRUE);
/* create a color map */
cmap = XCreateColormap(dpy, RootWindow(dpy, vi->screen),
vi->visual, AllocNone);
/* create a window */
width = 400;
height = 300;
hint.x = 0;
hint.y = 0;
hint.width = width;
hint.height = height;
hint.flags = PPosition | PSize;
swa.colormap = cmap;
swa.border_pixel = 0;
swa.event_mask = StructureNotifyMask;
win = XCreateWindow(dpy, RootWindow(dpy, vi->screen), 0, 0, width, height,
0, vi->depth, InputOutput, vi->visual,
CWBorderPixel|CWColormap|CWEventMask, &swa);
XSetStandardProperties (dpy, win, name, name, None, NULL, 0, &hint);
XMapWindow(dpy, win);
XIfEvent(dpy, &event, WaitForNotify, (char*)win);
XSelectInput(dpy, win, KeyPressMask | StructureNotifyMask | ExposureMask);
/* connect the context to the window */
glXMakeCurrent(dpy, win, cx);
init();
reshape(width, height);
while (1) {
if (XPending(dpy) > 0) {
XNextEvent(dpy,&xev);
switch(xev.type) {
case KeyPress:
XLookupString((XKeyEvent *)&xev,buf,80,&keysym,&status);
switch(keysym) {
case XK_Up:
k = KEY_UP;
break;
case XK_Down:
k = KEY_DOWN;
break;
case XK_Left:
k = KEY_LEFT;
break;
case XK_Right:
k = KEY_RIGHT;
break;
case XK_Escape:
k = KEY_ESCAPE;
break;
default:
k = keysym;
}
key(k, 0);
break;
case ConfigureNotify:
{
int width,height;
width = xev.xconfigure.width;
height = xev.xconfigure.height;
glXWaitX();
reshape(width, height);
}
break;
}
} else {
idle();
}
}
return 0;
}
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