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#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <X11/Xft/Xft.h>
#include <X11/Xlib.h>
#include "pipe.h"
Display* display;
Window win;
GC gc;
XftFont* font;
XftColor fg_color;
static int height = 17;
static int width = 1000;
static float width_ratio = 1;
static int err_code = 1;
void die(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
putc('\n', stderr);
exit(err_code);
}
void draw_bar(void) {
}
void init_x(void) {
display = XOpenDisplay(NULL);
if (display == NULL) {
die("could not open X display");
}
XSetWindowAttributes win_attr = {
.override_redirect = 1,
.background_pixel = 0x202020,
.event_mask = ExposureMask | PropertyChangeMask,
};
Screen* screen = DefaultScreenOfDisplay(display);
width = WidthOfScreen(screen);
win = XCreateWindow(
display,
DefaultRootWindow(display),
0, 0,
width, height,
0,
CopyFromParent,
InputOutput,
CopyFromParent,
CWOverrideRedirect | CWBackPixel | CWEventMask,
&win_attr
);
XMapRaised(display, win);
gc = XCreateGC(display, win, 0, NULL);
XSetForeground(display, gc, 0xFFFFFF);
const char font_name[] = "CommitMono:style=Regular:antialias=true";
font = XftFontOpenName(display, DefaultScreen(display), font_name);
XftColorAllocName(
display,
DefaultVisual(display, DefaultScreen(display)),
DefaultColormap(display, DefaultScreen(display)),
"#FFFFFF",
&fg_color
);
XFlush(display);
}
void deinit_x(void) {
XftFontClose(display, font);
XUnmapWindow(display, win);
XDestroyWindow(display, win);
}
void draw_text(const char* text, int x, int y) {
XftDraw* xft_draw = XftDrawCreate(
display,
win,
DefaultVisual(display, DefaultScreen(display)),
DefaultColormap(display, DefaultScreen(display))
);
int dy = y + (height - font->height) / 2 + font->ascent;
XftDrawString8(xft_draw, &fg_color, font, x, dy, (const FcChar8*)text, strlen(text));
XftDrawDestroy(xft_draw);
}
int main(void) {
init_pipe();
init_x();
while (true) {
XEvent ev;
XNextEvent(display, &ev);
XClearWindow(display, win);
draw_text("Hello, world!", 0, 0);
XFlush(display);
await_change();
}
deinit_x();
return 0;
}
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