#region ================== Copyright (c) 2007 Pascal vd Heiden

/*
 * Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
 * This program is released under GNU General Public License
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 */

#endregion

#region ================== Namespaces

using System;
using System.Drawing;
using System.IO;
using CodeImp.DoomBuilder.IO;

#endregion

namespace CodeImp.DoomBuilder.Data
{
	internal class SimpleTextureImage : ImageData
	{
		#region ================== Constants

		#endregion

		#region ================== Variables

		private readonly string lumpname;

		#endregion

		#region ================== Constructor / Disposer

		// Constructor
		public SimpleTextureImage(string name, string lumpname, float scalex, float scaley)
		{
			// Initialize
			this.scale.x = scalex;
			this.scale.y = scaley;
			this.lumpname = lumpname;
			SetName(name);
			virtualname = "[Textures]/" + this.name; //mxd
			
			// We have no destructor
			GC.SuppressFinalize(this);
		}

		#endregion

		#region ================== Methods

		// This loads the image
		protected override LocalLoadResult LocalLoadImage()
		{
			// Get the patch data stream
			Bitmap bitmap = null;
            string error = null;
			string patchlocation = string.Empty; //mxd
			Stream patchdata = General.Map.Data.GetTextureData(lumpname, hasLongName, ref patchlocation);
			if(patchdata != null)
			{
				// Copy patch data to memory
				byte[] membytes = new byte[(int)patchdata.Length];

				lock(patchdata) //mxd
				{
					patchdata.Seek(0, SeekOrigin.Begin);
					patchdata.Read(membytes, 0, (int)patchdata.Length);
				}
					
				MemoryStream mem = new MemoryStream(membytes);
				mem.Seek(0, SeekOrigin.Begin);

				bitmap = ImageDataFormat.TryLoadImage(mem, ImageDataFormat.DOOMPICTURE, General.Map.Data.Palette);

				// Not loaded?
				if(bitmap == null)
				{
					error = "Image lump \"" + Path.Combine(patchlocation, lumpname) + "\" data format could not be read, while loading texture \"" + this.Name + "\". Does this lump contain valid picture data at all?";
				}

				// Done
				mem.Dispose();
			}
			else
			{
				error = "Image lump \"" + lumpname + "\" could not be found, while loading texture \"" + this.Name + "\". Did you forget to include required resources?";
			}
				
			return new LocalLoadResult(bitmap, error);
		}
		
		#endregion
	}
}