83 lines
1.8 KiB
Rust
83 lines
1.8 KiB
Rust
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use std::sync::{Arc, Mutex};
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use crate::error::Error;
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use crate::system::System;
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use crate::devices::{ClockElapsed, Address, Addressable, Steppable, Transmutable};
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use crate::host::gfx::FrameSwapper;
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use crate::host::traits::{Host, BlitableSurface};
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const SCRN_BASE: u32 = 0x07A700;
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pub struct MacVideo {
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pub swapper: Arc<Mutex<FrameSwapper>>,
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}
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impl MacVideo {
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pub fn create<H: Host>(host: &mut H) -> Result<Self, Error> {
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let swapper = FrameSwapper::new_shared(512, 342);
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host.add_window(FrameSwapper::to_boxed(swapper.clone()))?;
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Ok(Self {
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swapper,
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})
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}
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}
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pub struct BitIter {
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pub bit: i8,
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pub data: u16,
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}
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impl BitIter {
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pub fn new(data: u16) -> Self {
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Self {
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bit: 15,
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data,
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}
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}
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}
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impl Iterator for BitIter {
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type Item = u32;
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fn next(&mut self) -> Option<Self::Item> {
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if self.bit < 0 {
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None
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} else {
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let bit = (self.data & (1 << self.bit)) != 0;
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self.bit -= 1;
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if bit {
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Some(0xC0C0C0)
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} else {
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Some(0)
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}
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}
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}
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}
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impl Steppable for MacVideo {
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fn step(&mut self, system: &System) -> Result<ClockElapsed, Error> {
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let mut memory = system.get_bus();
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let mut swapper = self.swapper.lock().unwrap();
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for y in 0..342 {
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for x in 0..(512 / 16) {
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let word = memory.read_beu16((SCRN_BASE + (x * 2) + (y * (512 / 8))) as Address)?;
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swapper.current.blit(x * 16, y, BitIter::new(word), 16, 1);
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}
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}
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Ok(16_600_000)
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}
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}
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impl Transmutable for MacVideo {
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fn as_steppable(&mut self) -> Option<&mut dyn Steppable> {
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Some(self)
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}
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}
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