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// TODO(kard): destroy this file, i don't care about platform layer rn this is some gpt trash
// it flickers so bad
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
// TODO(kard): we should probably put more thought into this
#include "example.c"
#define DEFAULT_WIDTH 256
#define DEFAULT_HEIGHT 256
static sponge_Canvas canvas = { 0 };
static Display *dpy;
static XImage *ximg = 0;
void init_canvas(uint32_t width, uint32_t height) {
if (ximg) {
XDestroyImage(ximg); // also frees data (why??)
// TODO(kard): you can set ximg->data to null before XDestroyImage
ximg = NULL;
}
canvas.pixels = (uint32_t*)malloc(width * height * 4);
if (!canvas.pixels) {
fprintf(stderr, "failed to allocate pixel buffer\n");
exit(1);
}
canvas.width = width;
canvas.height = height;
canvas.stride = width;
// TODO(kard): i assume this can fail
ximg = XCreateImage(
dpy,
DefaultVisual(dpy, 0),
DefaultDepth(dpy, 0),
ZPixmap,
0,
(char*)canvas.pixels,
width,
height,
32,
0
);
}
int main() {
dpy = XOpenDisplay(NULL);
if (!dpy) {
fprintf(stderr, "failed to open display\n");
return 1;
}
int screen = DefaultScreen(dpy);
// TODO(kard): i assume all of the following x functions can fail
// clanker only checked XOpenDisplay for some reason
Window win = XCreateSimpleWindow(
dpy,
RootWindow(dpy, screen),
10, 10, DEFAULT_WIDTH, DEFAULT_HEIGHT,
1,
BlackPixel(dpy, screen),
BlackPixel(dpy, screen)
);
XStoreName(dpy, win, "sponge");
XSelectInput(dpy, win, ExposureMask | KeyPressMask | StructureNotifyMask);
GC gc = DefaultGC(dpy, screen);
XMapWindow(dpy, win);
init_canvas(DEFAULT_WIDTH, DEFAULT_HEIGHT);
int running = 1;
while (running) {
while (XPending(dpy)) {
XEvent ev;
XNextEvent(dpy, &ev);
switch (ev.type) {
case Expose:
//draw_frame(canvas);
break;
case ConfigureNotify:
// TODO(kard): this is some implicit signed to unsigned conversion
init_canvas(ev.xconfigure.width, ev.xconfigure.height);
break;
case KeyPress:
break;
}
}
draw_frame(canvas);
XPutImage(dpy, win, gc, ximg, 0, 0, 0, 0, canvas.width, canvas.height);
usleep(16000);
}
if (ximg) {
ximg->data = NULL; // prevent double free
XDestroyImage(ximg);
}
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
return 0;
}
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