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This instruction specifies the shader version number and works on all shader versions.
ps_mainVer_subVer
Input arguments contain a single main version number with a single sub version number. The allowable combinations are listed in the table below.
| Main versions | Sub versions |
|---|---|
| 1 | 1, 2, 3, 4 |
| 2 | 0, x (extended), sw (software) |
| 3 | 0, sw (software) |
| Pixel shader versions | 1_1 | 1_2 | 1_3 | 1_4 | 2_0 | 2_x | 2_sw | 3_0 | 3_sw |
|---|---|---|---|---|---|---|---|---|---|
| ps | x | x | x | x | x | x | x | x | x |
This instruction must be the first non-comment instruction in a pixel shader.
Hardware accelerated versions of the software (versions without _sw in the version number), can process vertices with hardware accelearation or use software vertex processing. Software versions (versions with _sw in the version number) process vertices only with software.
This partial example declares a version 1_1 pixel shader.
ps_1_1
This partial example declares a version 1_4 pixel shader.
ps_1_4