Function SDL_DrawGPUPrimitives 

pub unsafe extern "C" fn SDL_DrawGPUPrimitives(
    render_pass: *mut SDL_GPURenderPass,
    num_vertices: Uint32,
    num_instances: Uint32,
    first_vertex: Uint32,
    first_instance: Uint32,
)

Draws data using bound graphics state.

You must not call this function before binding a graphics pipeline.

Note that the first_vertex and first_instance parameters are NOT compatible with built-in vertex/instance ID variables in shaders (for example, SV_VertexID); GPU APIs and shader languages do not define these built-in variables consistently, so if your shader depends on them, the only way to keep behavior consistent and portable is to always pass 0 for the correlating parameter in the draw calls.

Parameter: render_pass a render pass handle. Parameter: num_vertices the number of vertices to draw. Parameter: num_instances the number of instances that will be drawn. Parameter: first_vertex the index of the first vertex to draw. Parameter: first_instance the ID of the first instance to draw.

Available Since: This function is available since SDL 3.2.0.