redstrate/physis
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Simplify texture code for now, add actual BC5 support

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This commit is contained in:
Joshua Goins 2024-04-17 20:26:45 -04:00
parent 58f411005d
commit 7cf6ab8f60
1 changed files with 17 additions and 18 deletions
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35
src/tex.rs
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@ -49,7 +49,8 @@ bitflags! {
enum TextureFormat {
B8G8R8A8 = 0x1450,
BC1 = 0x3420,
BC5 = 0x3431,
BC3 = 0x3431,
BC5 = 0x6230,
}
#[binrw]
@ -84,31 +85,18 @@ impl Texture {
let mut cursor = Cursor::new(buffer);
let header = TexHeader::read(&mut cursor).ok()?;
// TODO: Adapted from Lumina, but this really can be written better...
let mut texture_data_size = vec![0; min(13, header.mip_levels as usize)];
let size = texture_data_size.len();
for i in 0..size - 1 {
texture_data_size[i] = header.offset_to_surface[i + 1] - header.offset_to_surface[i];
}
texture_data_size[size - 1] =
(buffer.len() - header.offset_to_surface[size - 1] as usize) as u32;
cursor
.seek(SeekFrom::Start(header.offset_to_surface[0] as u64))
.seek(SeekFrom::Start(std::mem::size_of::<TexHeader>() as u64))
.ok()?;
let mut src = vec![0u8; texture_data_size.iter().sum::<u32>() as usize];
let mut src = vec![0u8; buffer.len() - std::mem::size_of::<TexHeader>() as usize];
cursor.read_exact(src.as_mut_slice()).ok()?;
let mut dst;
match header.format {
TextureFormat::B8G8R8A8 => {
dst =
vec![0u8; texture_data_size.iter().sum::<u32>() as usize];
dst.copy_from_slice(&src);
dst = src;
}
TextureFormat::BC1 => {
dst = vec![0u8; header.width as usize * header.height as usize * 4];
@ -121,7 +109,7 @@ impl Texture {
dst.as_mut_slice(),
);
}
TextureFormat::BC5 => {
TextureFormat::BC3 => {
dst = vec![0u8; header.width as usize * header.height as usize * 4];
let format = Format::Bc3;
@ -132,6 +120,17 @@ impl Texture {
dst.as_mut_slice(),
);
}
TextureFormat::BC5 => {
dst = vec![0u8; header.width as usize * header.height as usize * 4];
let format = Format::Bc5;
format.decompress(
&src,
header.width as usize,
header.height as usize,
dst.as_mut_slice(),
);
}
}
Some(Texture {