emit_stream (sm5 - asm)
Emit a vertex to a given stream.
| emit_stream streamIndex |
|---|
| Item | Description |
|---|---|
| streamIndex |
[in] The stream index. |
Remarks
This instruction causes all declared o# registers for the given stream to be read out of the geometry shader to generate a vertex. Afer the emit, all data in all output registers for all streams become uninitialized, not just the stream emitted to.
streamIndex must be an immediate value [0..3] for a declared stream.
As multiple emit_stream calls are issued, primitives are generated.
Restrictions
- emit_stream can appear any number of times in a geometry shader, including within flow control.
- If streams have not been declared, then you must use emit instead of emit_stream.
This instruction applies to the following shader stages:
| Vertex | Hull | Domain | Geometry | Pixel | Compute |
|---|---|---|---|---|---|
| X |
Minimum Shader Model
This instruction is supported in the following shader models:
| Shader Model | Supported |
|---|---|
| Shader Model 5 | yes |
| Shader Model 4.1 | no |
| Shader Model 4 | no |
| Shader Model 3 (DirectX HLSL) | no |
| Shader Model 2 (DirectX HLSL) | no |
| Shader Model 1 (DirectX HLSL) | no |