# SDL_PushGPUVertexUniformData

Pushes data to a vertex uniform slot on the command buffer.

## Header File

Defined in [<SDL3/SDL_gpu.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_gpu.h)

## Syntax

```c
void SDL_PushGPUVertexUniformData(
    SDL_GPUCommandBuffer *command_buffer,
    Uint32 slot_index,
    const void *data,
    Uint32 length);
```

## Function Parameters

|                                                |                    |                                          |
| ---------------------------------------------- | ------------------ | ---------------------------------------- |
| [SDL_GPUCommandBuffer](SDL_GPUCommandBuffer) * | **command_buffer** | a command buffer.                        |
| [Uint32](Uint32)                               | **slot_index**     | the vertex uniform slot to push data to. |
| const void *                                   | **data**           | client data to write.                    |
| [Uint32](Uint32)                               | **length**         | the length of the data to write.         |

## Remarks

Subsequent draw calls will use this uniform data.

The data being pushed must respect std140 layout conventions. In practical
terms this means you must ensure that vec3 and vec4 fields are 16-byte
aligned.

For detailed information about accessing uniform data from a shader, please
refer to [SDL_CreateGPUShader](SDL_CreateGPUShader).

## Version

This function is available since SDL 3.2.0.

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[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryGPU](CategoryGPU)