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use crate::cio::{Cmd, IOCB};
use crate::consts;
use ufmt_write::uWrite;
pub fn show_cursor(visible: bool) {
unsafe {
*crate::consts::CRSINH = !visible as u8;
}
}
pub fn clear_atract() {
unsafe { *consts::ATRACT = 0 }
}
pub fn gotoxy(x: i16, y: i16) {
unsafe {
**consts::OLDADR = *consts::OLDCHR;
*consts::OLDADR = (*consts::SAVMSC).add(40 * y as usize + x as usize);
let c = **consts::OLDADR;
*consts::OLDCHR = c;
if *consts::CRSINH == 0 {
**consts::OLDADR |= 0x80;
}
set_pos(x, y);
}
}
pub fn set_pos(x: i16, y: i16) {
unsafe {
*consts::COLCRS = x as u16;
*consts::ROWCRS = y as u8;
}
}
pub fn set_start_pos(x: i16, y: i16) {
unsafe {
*consts::OLDCOL = x as u16;
*consts::OLDROW = y as u8;
}
}
pub fn init_graphics(mode: u8, open_mode: u8) {
IOCB::new(6)
.cmd(Cmd::Open as u8)
.buffer(b"S:\x9b")
.icax1(open_mode)
.icax2(mode)
.call();
}
pub fn close_graphics() {
IOCB::new(6).cmd(Cmd::Close as u8).call();
}
pub fn draw_line(x: i16, y: i16, dx: i16, dy: i16) {
set_start_pos(x, y);
draw_to(dx, dy);
}
pub fn draw_to(dx: i16, dy: i16) {
set_pos(dx, dy);
IOCB::new(6).cmd(17).icax1(12).icax2(0).call();
}
pub fn set_color(color: u8) {
unsafe {
*consts::ATACHR = color;
}
}
pub fn plot(x: i16, y: i16) {
set_pos(x, y);
let color = unsafe { *consts::ATACHR };
IOCB::new(6)
.cmd(Cmd::PutBytes as u8)
.buffer(&[])
.call_with_a(color);
}
pub fn clrscr() {
let scr_slice = unsafe {
let scr_addr = *consts::SAVMSC;
core::slice::from_raw_parts_mut(scr_addr, 40 * 24)
};
scr_slice.fill(0);
}
pub fn atascii_to_screen(b: u8) -> u8 {
(match b & 0x7f {
0..=31 => b + 64,
32..=95 => b - 32,
_ => b,
}) | (b & 128)
}
pub struct ScreenMemoryWriter<'a> {
buffer: &'a mut [u8],
written: usize,
}
impl<'a> ScreenMemoryWriter<'a> {
pub fn new(buffer: &'a mut [u8]) -> ScreenMemoryWriter<'a> {
ScreenMemoryWriter { buffer, written: 0 }
}
}
impl<'a> uWrite for ScreenMemoryWriter<'a> {
type Error = ();
fn write_str(&mut self, s: &str) -> Result<(), Self::Error> {
for b in s.bytes().map(atascii_to_screen) {
if self.written >= self.buffer.len() {
return Err(());
}
self.buffer[self.written] = b;
self.written += 1;
}
Ok(())
}
}