ShuriZma
/
xenia-canary
mirror of https://github.com/xenia-canary/xenia-canary.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

[D3D12] DXT5A swizzle

This commit is contained in:
Triang3l 2018-08-16 17:36:03 +03:00
parent ed7f4ec4be
commit e572f65d11
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/xenia/gpu/d3d12/texture_cache.cc
View File

@ -542,18 +542,22 @@ void TextureCache::TextureKeyFromFetchConstant(
key_out.endianness = Endian(fetch.endianness);
uint32_t swizzle = fetch.swizzle;
const uint32_t swizzle_constant_mask = 4 | (4 << 3) | (4 << 6) | (4 << 9);
uint32_t swizzle_constant = swizzle & swizzle_constant_mask;
uint32_t swizzle_not_constant = swizzle_constant ^ swizzle_constant_mask;
// Get rid of 6 and 7 values (to prevent device losses if the game has
// something broken) the quick and dirty way - by changing them to 4 and 5.
swizzle &= ~((swizzle & (4 | (4 << 3) | (4 << 6) | (4 << 9))) >> 1);
swizzle &= ~(swizzle_constant >> 1);
// Remap the swizzle according to the texture format.
if (format == TextureFormat::k_DXT3A) {
// DXT3A is emulated as DXT3 with zero color, but the alpha should be
// replicated into all channels.
// http://fileadmin.cs.lth.se/cs/Personal/Michael_Doggett/talks/unc-xenos-doggett.pdf
// If not 0.0 or 1.0 (if the high bit isn't set), make 3 (alpha).
uint32_t swizzle_not_constant =
~swizzle & (4 | (4 << 3) | (4 << 6) | (4 << 9));
swizzle |= (swizzle_not_constant >> 1) | (swizzle_not_constant >> 2);
} else if (format == TextureFormat::k_DXT5A) {
// DXT5A is emulated as BC4, but DXT5 alpha (BC4 red) should be replicated.
swizzle &= ~((swizzle_not_constant >> 1) | (swizzle_not_constant >> 2));
}
swizzle_out = swizzle;
}