glbackend tests, copy first try from hg reposglbackend

1 files changed, 103 insertions, 0 deletions

diff --git a/src/OpenGL/GLBackend/Surface.cs b/src/OpenGL/GLBackend/Surface.cs
new file mode 100644
index 00000000..010a0f54
--- /dev/null
+++ b/src/OpenGL/GLBackend/Surface.cs
@@ -0,0 +1,103 @@
+using System;
+using OpenTK.Graphics.OpenGL;
+
+namespace go.GLBackend
+{
+	[Serializable]
+	public enum Format
+	{
+		Argb32,
+		Rgb24,
+		A8,
+		A1,
+		Rgb16565,
+		ARGB32,
+		RGB24
+	}
+	[Serializable]
+	public enum LineJoin
+	{
+		Miter,
+		Round,
+		Bevel
+	}
+	[Serializable]
+	public enum LineCap
+	{
+		Butt,
+		Round,
+		Square
+	}
+	public class Surface : IDisposable
+	{
+		public static int samples;
+
+		public int 	texId,
+					width,
+					height;
+		Format format;
+
+		public PixelFormat PixelFormat;
+		public PixelInternalFormat InternalFormat;
+
+		public Surface (int _width, int _height)
+		{
+			format = Format.Argb32;
+			width = _width;
+			height = _height;
+
+			createTexture ();
+		}
+
+		public Surface (Format _format,int _width, int _height)
+		{
+			format = _format;
+			width = _width;
+			height = _height;
+
+			InternalFormat = PixelInternalFormat.Rgba;
+			PixelFormat = PixelFormat.Bgra;
+
+			createTexture ();
+		}
+
+		public Surface CreateSimilar()
+		{
+			return new Surface (format, width, height);
+		}
+			
+		void createTexture()
+		{
+			texId = GL.GenTexture();
+			GL.BindTexture(TextureTarget.Texture2D, texId);
+			GL.TexImage2D(TextureTarget.Texture2D,0,
+				PixelInternalFormat.Rgba, width, height,0,PixelFormat.Bgra,PixelType.UnsignedByte,IntPtr.Zero);
+			GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Nearest);
+			GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Nearest);
+			GL.BindTexture(TextureTarget.Texture2D, 0);
+		}
+
+
+		public void Save(string fileName)
+		{
+			GL.BindTexture(TextureTarget.Texture2D, texId);
+			System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+			System.Drawing.Imaging.BitmapData data = bmp.LockBits(new System.Drawing.Rectangle(0, 0, width, height),
+				System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+			GL.GetTexImage(TextureTarget.Texture2D, 0, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, data.Scan0);
+			bmp.UnlockBits(data);
+			bmp.RotateFlip (System.Drawing.RotateFlipType.RotateNoneFlipY);
+			bmp.Save(fileName);
+			GL.BindTexture(TextureTarget.Texture2D, 0);
+		}
+
+		#region IDisposable implementation
+		public void Dispose ()
+		{
+			if (GL.IsTexture (texId))
+				GL.DeleteTexture (texId);
+		}
+		#endregion
+	}
+}
+