using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Security.Permissions;
using System.Windows.Forms;
using Tao.OpenGl;


namespace Nux
{
    public class Texture
    {
        private int[] index;
        private int width;
        private int height;

        [EnvironmentPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]//For codeanalyst
        public Texture(string path)
        {
            index = new int[1];
            Gl.glGenTextures(1, index);
            LoadTexture(path);
        }

        [EnvironmentPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]//For codeanalyst
        public void LoadTexture(string path)
        {
            Bitmap image;

            try
            {
                image = new Bitmap(path);

                image.RotateFlip(RotateFlipType.RotateNoneFlipY);
                Rectangle rect = new Rectangle(0, 0, image.Width, image.Height);
                height = image.Height;
                width = image.Width;
                BitmapData bitmapdata = image.LockBits(rect, ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
                Gl.glBindTexture(Gl.GL_TEXTURE_2D, index[0]);
                Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA, image.Width, image.Height,
                                0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, bitmapdata.Scan0);
                Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR);
                Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR);
                Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_WRAP_S, Gl.GL_CLAMP);
                Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_WRAP_T, Gl.GL_CLAMP);
                image.UnlockBits(bitmapdata);
                image.Dispose();
            }
            catch (ArgumentException)
            {
                if (!string.IsNullOrEmpty(path))
                {
                    MessageBox.Show("The image " + path + " was not found. The system will now exit",
                                    "Image Not Found",
                                    MessageBoxButtons.OK,
                                    MessageBoxIcon.Warning,
                                    MessageBoxDefaultButton.Button1,
                                    MessageBoxOptions.ServiceNotification);
                }
                else
                {
                    MessageBox.Show("The system attempted to access a resource that does not exist and will exit", 
                                    "Damaged Resource File",
                                    MessageBoxButtons.OK, 
                                    MessageBoxIcon.Warning, 
                                    MessageBoxDefaultButton.Button1, 
                                    MessageBoxOptions.ServiceNotification);
                }

                Environment.Exit(0);
            }
        }

        public void Activate()
        {
            Gl.glBindTexture(Gl.GL_TEXTURE_2D, index[0]);
        }

        public int GetWidth
        {
            get { return width; }
        }

        public int GetHeight
        {
            get { return height; }
        }
    }
}