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#include <camellia.h>
#include <camellia/syscalls.h>
#include <shared/container/ring.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <user/lib/draw/draw.h>
#define MOUSE_SIZE 10
#define eprintf(fmt, ...) fprintf(stderr, "drawmouse: "fmt"\n" __VA_OPT__(,) __VA_ARGS__)
struct framebuf fb, lastbehind;
struct rect dirty;
static uint8_t r_buf[64];
static ring_t r = {(void*)r_buf, sizeof r_buf, 0, 0};
static struct {uint32_t x, y;} cursor, lastcur;
static void draw_mouse(void) {
static bool drawn = false;
if (drawn)
fb_cpy(&fb, &lastbehind, lastcur.x, lastcur.y, 0, 0, MOUSE_SIZE, MOUSE_SIZE);
drawn = true;
dirty_mark(&dirty, lastcur.x, lastcur.y);
dirty_mark(&dirty, lastcur.x + MOUSE_SIZE, lastcur.y + MOUSE_SIZE);
fb_cpy(&lastbehind, &fb, 0, 0, cursor.x, cursor.y, MOUSE_SIZE, MOUSE_SIZE);
for (int i = 0; i < MOUSE_SIZE; i++) {
for (int j = 0; j < MOUSE_SIZE - i; j++) {
uint32_t *px = fb_pixel(&fb, cursor.x + i, cursor.y + j);
if (px) {
*px ^= 0x808080;
dirty_mark(&dirty, cursor.x + i, cursor.y + j);
}
}
}
lastcur = cursor;
}
struct packet {
uint8_t left : 1;
uint8_t right : 1;
uint8_t middle : 1;
uint8_t _useless : 5;
int8_t dx, dy;
} __attribute__((packed));
int main(void) {
char buf[64];
hid_t fd = camellia_open("/kdev/ps2/mouse", OPEN_READ);
if (fd < 0) {
eprintf("couldn't open mouse");
return 1;
}
if (fb_setup(&fb, "/kdev/video/") < 0) {
eprintf("fb_setup error");
return 1;
}
fb_anon(&lastbehind, MOUSE_SIZE, MOUSE_SIZE);
for (;;) {
int len = _sys_read(fd, buf, sizeof buf, 0);
if (len == 0) break;
ring_put(&r, buf, len);
while (ring_used(&r) >= 3) {
struct packet p;
ring_get(&r, &p, sizeof p);
p.dy *= -1;
// TODO check mouse click
if (-p.dx > (int)cursor.x) p.dx = -cursor.x;
if (-p.dy > (int)cursor.y) p.dy = -cursor.y;
cursor.x += p.dx;
cursor.y += p.dy;
if (cursor.x >= fb.width) cursor.x = fb.width - 1;
if (cursor.y >= fb.height) cursor.y = fb.height - 1;
draw_mouse();
if (p.left && p.right) return 0;
}
dirty_flush(&dirty, &fb);
}
return 0;
}
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