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complicated update to rendering code to allow linewraps

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kirjavascript 2021-05-09 14:08:43 +01:00
parent b4bb6f0e32
commit 8a196bd63a
1 changed files with 8 additions and 14 deletions
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22
emu/src/lib.rs
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@ -164,18 +164,14 @@ impl Megadrive {
// tile is 32 bytes
for pixel in 0..screen_width {
for screen_pixel in 0..screen_width {
// switch to inner tile loop
// do line offset
let pixel = (screen_pixel + 150) % screen_width;
if let Some((priority, palette, vflip, hflip, tile)) = tiles_b.get(pixel / 8) {
let tile_pixel = if *hflip {
pixel ^ 0xF
} else {
pixel
};
let tile_pixel = if *hflip { pixel ^ 0xF } else { pixel };
let x_offset = (tile_pixel & 6) >> 1;
let y_offset = if *vflip { tile_y ^ 7 } else { tile_y } * 4;
@ -191,7 +187,7 @@ impl Megadrive {
if px != 0 {
let (r, g, b) = self.core.mem.vdp.color(*palette, px as _);
let screen_offset = (pixel + (line * screen_width)) * 3;
let screen_offset = (screen_pixel + (line * screen_width)) * 3;
self.screen[screen_offset] = r;
self.screen[screen_offset + 1] = g;
@ -200,12 +196,10 @@ impl Megadrive {
}
let pixel = (screen_pixel + 150) % screen_width;
if let Some((priority, palette, vflip, hflip, tile)) = tiles_a.get(pixel / 8) {
let tile_pixel = if *hflip {
pixel ^ 0xF
} else {
pixel
};
let tile_pixel = if *hflip { pixel ^ 0xF } else { pixel };
let x_offset = (tile_pixel & 6) >> 1;
let y_offset = if *vflip { tile_y ^ 7 } else { tile_y } * 4;
@ -221,7 +215,7 @@ impl Megadrive {
if px != 0 {
let (r, g, b) = self.core.mem.vdp.color(*palette, px as _);
let screen_offset = (pixel + (line * screen_width)) * 3;
let screen_offset = (screen_pixel + (line * screen_width)) * 3;
self.screen[screen_offset] = r;
self.screen[screen_offset + 1] = g;