using Engine.Renderer.Pixel;
using OpenTK.Graphics.OpenGL;

namespace Engine.Renderer.Texture;

public class DynamicTexture<T> : Texture<T> where T : struct, IPixel
{
    private readonly PixelFormat _format;
    private readonly PixelType _type;
    private readonly PixelInternalFormat _internalFormat;

    public DynamicTexture(int width, int height) : base(width, height)
    {
        var pixel = default(T);
        _format = pixel.Format;
        _type = pixel.Type;
        _internalFormat = pixel.InternalFormat;

        GL.BindTexture(TextureTarget.Texture2D, Handle);
        GL.TexImage2D(TextureTarget.Texture2D, 0, _internalFormat, Width, Height, 0, _format, _type,
            IntPtr.Zero);
    }

    public void Resize(int width, int height)
    {
        if (Width == width && Height == height)
            return;

        Width = width;
        Height = height;

        Bind();
        GL.TexImage2D(TextureTarget.Texture2D, 0, _internalFormat, Width, Height, 0, _format, _type,
            IntPtr.Zero);
    }
}