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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 <bits/time.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#define SPONGE_IMPLEMENTATION
#include "../../sponge.h"
#define STB_IMAGE_IMPLEMENTATION
#include "../vendor/stb_image.h"
#include "../example.h"
#define DEFAULT_WIDTH 1280
#define DEFAULT_HEIGHT 720
#define TARGET_FRAME_TIME_NS 16666667L
static size_t pixels_buffer_count = 0;
static sponge_Texture canvas = { 0 };
static float *depths = NULL;
static Display *dpy;
static XImage *ximg = NULL;
void timespec_add_ns(struct timespec *inout_t, long ns) {
inout_t->tv_nsec += ns;
while (inout_t->tv_nsec >= 1000000000L) {
inout_t->tv_nsec -= 1000000000L;
inout_t->tv_sec += 1;
}
}
long long timespec_sub_ns(struct timespec *a, struct timespec *b) {
long long sec = a->tv_sec - b->tv_sec;
long long result = a->tv_nsec - b->tv_nsec;
result += sec * 1000000000L;
return result;
}
int timespec_cmp(struct timespec *a, struct timespec *b) {
if (a->tv_sec < b->tv_sec) return -1;
if (a->tv_sec > b->tv_sec) return 1;
if (a->tv_nsec < b->tv_nsec) return -1;
if (a->tv_nsec > b->tv_nsec) return 1;
return 0;
}
void init_canvas(uint32_t width, uint32_t height) {
if (ximg) {
ximg->data = NULL;
XDestroyImage(ximg);
ximg = NULL;
}
size_t new_count = width * height;
if (new_count > pixels_buffer_count) {
sponge_Color32 *new_pixels_buffer = malloc(new_count * sizeof(uint32_t));
float *new_depths = malloc(new_count * sizeof(float));
if (!new_pixels_buffer || !new_depths) {
free(new_pixels_buffer);
free(new_depths);
exit(1);
fprintf(stderr, "failed to allocate pixel buffer\n");
}
free(canvas.pixels);
free(depths);
canvas.pixels = new_pixels_buffer;
depths = new_depths;
pixels_buffer_count = new_count;
}
canvas.width = width;
canvas.height = height;
canvas.stride_pixels = 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)
);
Atom atom_wm_delete_window = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
XSetWMProtocols(dpy, win, &atom_wm_delete_window, 1);
XStoreName(dpy, win, "sponge");
XSelectInput(dpy, win, ExposureMask | PointerMotionMask | StructureNotifyMask);
GC gc = DefaultGC(dpy, screen);
XMapWindow(dpy, win);
init_canvas(DEFAULT_WIDTH, DEFAULT_HEIGHT);
init();
struct timespec ts_next;
if (clock_gettime(CLOCK_MONOTONIC, &ts_next)) {
fprintf(stderr, "clock_gettime fail\n");
return 1;
}
timespec_add_ns(&ts_next, TARGET_FRAME_TIME_NS);
int running = 1;
while (running) {
if (clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts_next, NULL)) {
fprintf(stderr, "clock_nanosleep fail\n");
return 1;
}
struct timespec ts_now;
if (clock_gettime(CLOCK_MONOTONIC, &ts_now)) {
fprintf(stderr, "clock_gettime fail\n");
return 1;
}
if (sponge_texture_valid(canvas)) {
draw_frame_3d(canvas, depths);
struct timespec ts_draw;
if (clock_gettime(CLOCK_MONOTONIC, &ts_draw)) {
fprintf(stderr, "clock_gettime fail\n");
return 1;
}
long long draw_time = timespec_sub_ns(&ts_draw, &ts_now);
fprintf(stderr, "draw time: %3lld.%03lldms\n", draw_time / 1000000, (draw_time % 1000000) / 1000);
XPutImage(dpy, win, gc, ximg, 0, 0, 0, 0, canvas.width, canvas.height);
}
while (XPending(dpy)) {
XEvent ev;
XNextEvent(dpy, &ev);
switch (ev.type) {
case Expose:
//draw_frame(canvas);
break;
case ConfigureNotify:
init_canvas(ev.xconfigure.width, ev.xconfigure.height);
break;
case MotionNotify:
mouse_move(ev.xmotion.x, ev.xmotion.y);
break;
case ClientMessage:
if ((Atom)ev.xclient.data.l[0] == atom_wm_delete_window) {
running = 0;
}
break;
}
}
while (timespec_cmp(&ts_next, &ts_now) <= 0) {
timespec_add_ns(&ts_next, TARGET_FRAME_TIME_NS);
if (clock_gettime(CLOCK_MONOTONIC, &ts_now)) {
fprintf(stderr, "clock_gettime fail\n");
return 1;
}
}
}
if (ximg) {
ximg->data = NULL; // prevent double free
XDestroyImage(ximg);
}
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
return 0;
}
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