D3D Shaders - how does it work?

[Thomas Berger]

Hi,

i'm digging in the shader code for some hours right now, to understand what 
must be done to fix #41173 [1] and #40873 [2].

Right now, i don't really understand how the declaration of variables works in 
detail.

Is there any documentation how the handling and registering of variables 
works, or should the could be documentation enough?

[1] https://bugs.winehq.org/show_bug.cgi?id=41173
[2] https://bugs.winehq.org/show_bug.cgi?id=40873

Greetings, 
Thomas