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//
// Texture.cs
//
// Author:
// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2016 jp
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// 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.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Drawing;
using OpenTK.Graphics.OpenGL;
using System.Drawing.Imaging;
using System.IO;
using System.Diagnostics;
namespace Crow
{
public class Texture
{
public string Map;
public int texRef;
public int Width;
public int Height;
public Texture(string _mapPath, bool flipY = true)
{
using (Stream s = Interface.StaticGetStreamFromPath (_mapPath)) {
try {
Map = _mapPath;
Bitmap bitmap = new Bitmap (s);
if (flipY)
bitmap.RotateFlip (RotateFlipType.RotateNoneFlipY);
BitmapData data = bitmap.LockBits (new System.Drawing.Rectangle (0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
createTexture (data.Scan0, data.Width, data.Height);
bitmap.UnlockBits (data);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.GenerateMipmap (GenerateMipmapTarget.Texture2D);
} catch (Exception ex) {
Debug.WriteLine ("Error loading texture: " + Map + ":" + ex.Message);
}
}
}
public Texture(int width, int height)
{
createTexture (IntPtr.Zero, width, height);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Clamp);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Clamp);
}
void createTexture(IntPtr data, int width, int height)
{
Width = width;
Height = height;
GL.GenTextures(1, out texRef);
GL.BindTexture(TextureTarget.Texture2D, texRef);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0,
OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, data);
}
public static implicit operator int(Texture t)
{
return t == null ? 0: t.texRef;
}
}
}
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