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added transparency

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kirjavascript 2021-05-06 00:05:36 +01:00
parent 784d66ed01
commit 0c8f8986d4
1 changed files with 11 additions and 19 deletions
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30
emu/src/lib.rs
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@ -122,7 +122,7 @@ impl Megadrive {
let vscroll_mode = self.core.mem.vdp.vscroll_mode();
let hscroll_mode = self.core.mem.vdp.registers[0xB] & 3;
let planea_nametable =
((self.core.mem.vdp.registers[4] >> 3) as u32 & 3) << 10;
((self.core.mem.vdp.registers[4] >> 3) as usize & 3) << 10;
let index = match hscroll_mode {
@ -136,11 +136,9 @@ impl Megadrive {
let hscroll = hscroll_addr + (index * 4); // 3 ?
let planeb_nametable =
(self.core.mem.vdp.registers[4] as usize & 3) << 10;
(self.core.mem.vdp.registers[4] as usize & 3) << 14;
let planeb = &self.core.mem.vdp.VRAM[planeb_nametable*0x10..];
println!("{:X}", planeb_nametable);
let planeb = &self.core.mem.vdp.VRAM[planeb_nametable..];
let tiles = (0..cellw).map(|i| {
@ -155,15 +153,6 @@ impl Megadrive {
let tile_y = line & 7;
let y_offset = tile_y * 4;
// let y_offset = 0;
// for i in 0..0xFF {
// print!("{:b} ", planeb[i]);
// }
// println!("");
// tile is 32 bytes
for pixel in 0..screen_width {
@ -177,13 +166,16 @@ impl Megadrive {
px & 0xF
};
let (r, g, b) = self.core.mem.vdp.color(0, px as _);
if px != 0 {
let (r, g, b) = self.core.mem.vdp.color(0, px as _);
let screen_offset = (pixel + (line * screen_width)) * 3;
let screen_offset = (pixel + (line * screen_width)) * 3;
self.screen[screen_offset] = r;
self.screen[screen_offset + 1] = g;
self.screen[screen_offset + 2] = b;
}
self.screen[screen_offset] = r;
self.screen[screen_offset + 1] = g;
self.screen[screen_offset + 2] = b;
}
}