Microsoft DirectX 8.0 (C++) |
The following table lists the minimum available input registers for use by a Microsoft® DirectX® 8.0 vertex shader. Note that this table applies to version 1.0 pixel shaders.
Name | Count | I/O Permissions | Number Allowed per Instruction |
---|---|---|---|
an | 1 scalar | write/use only | 0 in version 1.0; 1 in version 1.1 |
c[n] | 96 vectors | read-only | 1 |
rn | 12 vectors | read/write | 3 |
vn | 16 vectors | read-only | 1 |