{simple,shoddy,smart} minsize-oriented linker
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/* "Tiny X11 Trans Flag" by Suricrasia Online, edited a bit to make testing
* easier */
#include<X11/X.h>
#include<X11/Xlib.h>
#include<X11/Xutil.h>
#include <X11/Xatom.h>
#define CANVAS_WIDTH 400
#define CANVAS_HEIGHT ((CANVAS_WIDTH * 2)/3)
#define COLOR(r, g, b) ((r << 16) + (g << 8) + b)
__attribute__((__used__,__externally_visible__))
void _start() {
/*int main() {*/
#ifdef MAKE_ESC_WORK
Atom wmDeleteMessage;
#endif
//initialize the window
Display* dpy = XOpenDisplay(NULL);
//this is so the window isn't resizable
static XSizeHints hints = {
.flags = USPosition | PMinSize | PMaxSize,
.width = CANVAS_WIDTH, .height = CANVAS_HEIGHT,
.max_width = CANVAS_WIDTH, .max_height = CANVAS_HEIGHT,
.min_width = CANVAS_WIDTH, .min_height = CANVAS_HEIGHT,
};
//it seems like just keeping this as 0 is probs ok... lol
const int s = 0;//DefaultScreen(dpy);
Window win = XCreateSimpleWindow(dpy, RootWindow(dpy, s), 0, 0, CANVAS_WIDTH, CANVAS_HEIGHT, 0, 0, COLOR(89, 200, 243));
#ifdef MAKE_ESC_WORK
wmDeleteMessage = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
XSetWMProtocols(dpy, win, &wmDeleteMessage, 1);
#endif
XSelectInput(dpy, win, ExposureMask|KeyPressMask);
XSetWMNormalHints(dpy, win, &hints);
//this actually opens the window
XMapWindow(dpy, win);
XEvent xev;
static XGCValues vals = {};
while(1/*XPending(dpy)>0*/) {
XNextEvent(dpy, &xev);
if (xev.type == Expose) {
GC gc = DefaultGC(dpy, s);
vals.foreground = COLOR(237, 165, 179);
XChangeGC(dpy, gc, GCForeground, &vals);
XFillRectangle(dpy, win, gc, 0, CANVAS_HEIGHT/5, CANVAS_WIDTH, CANVAS_HEIGHT * 3/5);
vals.foreground = COLOR(255, 255, 255);
XChangeGC(dpy, gc, GCForeground, &vals);
XFillRectangle(dpy, win, gc, 0, CANVAS_HEIGHT* 2/5, CANVAS_WIDTH, CANVAS_HEIGHT * 1/5);
}
#ifdef MAKE_ESC_WORK
else if (xev.type == KeyPress) {
if (((XKeyPressedEvent*)&xev)->keycode == XKeysymToKeycode(dpy,XK_Escape)) _exit(0);
} else if (xev.type == ClientMessage) {
if (xev.xclient.data.l[0] == wmDeleteMessage) _exit(0);
}
// swap buffers here
#endif
}
}