using System;
using TerraFX.Interop.DirectX;

namespace Auspex.Rendering.Direct3D;

internal abstract class HlslShaderData<TElement> : IDisposable where TElement : unmanaged
{
	private protected readonly GpuBuffer<TElement> _buffer;

	protected HlslShaderData(string name, FrameRenderContext ctx, int maxCount, bool dynamic)
	{
		_buffer = new GpuBuffer<TElement>(name, ctx, maxCount, 1u, dynamic);
	}

	public void Dispose()
	{
		_buffer.Dispose();
		GC.SuppressFinalize(this);
	}

	private protected unsafe void DrawVertices(FrameRenderContext ctx, int first, int count)
	{
		ID3D11Buffer* buffer = _buffer.Buffer;
		uint elementSize = (uint)_buffer.ElementSize;
		uint num = 0u;
		ctx.Context->IASetVertexBuffers(0u, 1u, &buffer, &elementSize, &num);
		ctx.Context->Draw((uint)count, (uint)first);
	}
}