Re: [PATCH 0/2] MR6983: wined3d: Add B4G4R4A4 and B5G5R5A1 support in Vulkan.

[Stefan Dösinger (＠stefan)]

On Fri Dec 13 17:11:47 2024 +0000, Jan Sikorski wrote:
> It looks like it should be `ZYXW`, or am I reading the fixup wrong?

Admitedly I found this via trial and error - YZWX was the one that got the textures in Maple Story right.

Here's a more thoughtful attempt in explaining it. I prefer Vulkan's pixel format enums over dxgi since someone at Microsoft insisted on reordering them vs their d3d9 counterparts...

WINED3DFMT_B4G4R4A4_UNORM matches VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT. My patch is using R4G4B4A4_UNORM for now:

```
VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT
VK_FORMAT_R4G4B4A4_UNORM_PACK16

A/W is in R/X
R/X is in G/Y
G/Y is in B/Z
B/Z is in A/W
```

we want to have RGBA in the shader read, so YZWX.