using global::System;
using global::System.Drawing;
using Bitmap = System.Drawing.Bitmap;
using global::System.Drawing.Imaging;
using global::OpenTK.Graphics.OpenGL;

namespace Pilz.Drawing.Drawing3D.OpenGLFactory.RenderingN
{
    public class ContentPipe
    {
        public static int LoadTexture(string filepath)
        {
            var bitmap = new Bitmap(filepath);
            return LoadTexture(bitmap);
        }

        public static int LoadTexture(Bitmap bitmap)
        {
            int id = GL.GenTexture();
            LoadTexture(bitmap, id);
            return id;
        }

        public static void LoadTexture(Bitmap bitmap, int id)
        {
            var bmpData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            GL.BindTexture(TextureTarget.Texture2D, id);
            GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, bitmap.Width, bitmap.Height, 0, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, bmpData.Scan0);
            bitmap.UnlockBits(bmpData);
            GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)Math.Truncate((decimal)TextureMinFilter.Linear));
            GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)Math.Truncate((decimal)TextureMagFilter.Linear));
        }
    }
}