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#include <camellia/syscalls.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <user/lib/draw/draw.h>
void dirty_reset(struct rect *d) {
d->x1 = ~0; d->y1 = ~0;
d->x2 = 0; d->y2 = 0;
}
void dirty_mark(struct rect *d, uint32_t x, uint32_t y) {
if (d->x1 > x) d->x1 = x;
if (d->x2 < x) d->x2 = x;
if (d->y1 > y) d->y1 = y;
if (d->y2 < y) d->y2 = y;
}
int fb_setup(struct framebuf *fb, const char *base) {
char path[64], *spec;
size_t pos;
FILE *f;
f = fopen(base, "r");
if (!f) return -errno;
pos = strlen(base);
memcpy(path, base, pos);
spec = path + pos;
fread(spec, 1, sizeof(path) - pos, f);
/* assumes the read went correctly */
fclose(f);
fb->fd = _syscall_open(path, strlen(path), 0);
if (fb->fd < 0) return fb->fd;
fb->width = strtol(spec, &spec, 0);
if (*spec++ != 'x') return -EINVAL;
fb->height = strtol(spec, &spec, 0);
if (*spec++ != 'x') return -EINVAL;
fb->bpp = strtol(spec, &spec, 0);
if (fb->bpp != 32) return -EINVAL;
fb->len = _syscall_getsize(fb->fd);
fb->pitch = fb->len / fb->height;
fb->b = malloc(fb->len);
_syscall_read(fb->fd, fb->b, fb->len, 0);
return 0;
}
int fb_anon(struct framebuf *fb, size_t w, size_t h) {
fb->width = w;
fb->height = h;
fb->bpp = 32;
fb->pitch = fb->width * fb->bpp / 8;
fb->len = fb->pitch * fb->height;
fb->b = malloc(fb->len);
fb->fd = -1;
return 0;
}
uint32_t *fb_pixel(struct framebuf *fb, uint32_t x, uint32_t y) {
if (x < fb->width && y < fb->height)
return (void*)fb->b + fb->pitch * y + 4 * x;
return NULL;
}
void fb_cpy(
struct framebuf *dest, const struct framebuf *src,
size_t xd, size_t yd, size_t xs, size_t ys, size_t w, size_t h)
{
for (size_t y = 0; y < h; y++) {
memcpy(
fb_pixel( dest, xd, yd + y),
fb_pixel((void*)src, xs, ys + y),
w * 4
);
}
}
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