///
///    This file is part of ILNumerics Community Edition.
///
///    ILNumerics Community Edition - high performance computing for applications.
///    Copyright (C) 2006 - 2012 Haymo Kutschbach, http://ilnumerics.net
///
///    ILNumerics Community Edition is free software: you can redistribute it and/or modify
///    it under the terms of the GNU General Public License version 3 as published by
///    the Free Software Foundation.
///
///    ILNumerics Community Edition 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 ILNumerics Community Edition. See the file License.txt in the root
///    of your distribution package. If not, see <http://www.gnu.org/licenses/>.
///
///    In addition this software uses the following components and/or licenses: 
///
///    =================================================================================
///    The Open Toolkit Library License
///    
///    Copyright (c) 2006 - 2009 the Open Toolkit library.
///    
///    Permission is hereby granted, free of charge, to any person obtaining a copy
///    of this software and associated documentation files (the "Software"), to deal
///    in the Software without restriction, including without limitation the rights to 
///    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
///    the Software, and to permit persons to whom the Software is furnished to do
///    so, subject to the following conditions:
///
///    The above copyright notice and this permission notice shall be included in all
///    copies or substantial portions of the Software.
///
///    =================================================================================
///    

using System;
using ILNumerics.Drawing.Shapes; 
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL; 

namespace ILNumerics.Drawing.Platform.OpenGL {
    /// <summary>
    /// An OpenGL vertex renderer, capable of rendering
    /// vertex arrays of type C4bV3f (simple /-primitive shapes).
    /// </summary>
    public unsafe class ILOGLPointsRendererC4bV3f : ILVertexRenderer {

        #region attributes
        #endregion

        #region properties
        #endregion

        public ILOGLPointsRendererC4bV3f () {
        }
        public override void Draw(ILRenderProperties props, ILShape shape) {
            GL.Enable(EnableCap.Blend);
            GL.BlendFunc (BlendingFactorSrc.SrcAlpha,
                          BlendingFactorDest.OneMinusSrcAlpha); 
            GL.Enable(EnableCap.DepthTest);
            ILPoints points = (shape as ILPoints);
            
            fixed (C4bV3f* pVertices = points.Vertices) {
                GL.InterleavedArrays(InterleavedArrayFormat.C4ubV3f, 0, (IntPtr)pVertices);
                if (points.Shading == ShadingStyles.Flat) {
                    GL.DisableClientState(EnableCap.ColorArray);
                    GL.Color4(points.FillColor);  
                }
                GL.Enable(EnableCap.PointSmooth); 
                GL.PointSize(points.Width); 
                GL.DrawArrays(BeginMode.Points, 0, points.VertexCount);
                GL.Finish();
            }
        }
        public override void Draw(ILRenderProperties props, ILShape shape, int[] indices) {
            GL.Enable(EnableCap.DepthTest);
            GL.Enable(EnableCap.Blend);
            GL.BlendFunc (BlendingFactorSrc.SrcAlpha,
                          BlendingFactorDest.OneMinusSrcAlpha); 
            ILPoints points = shape as ILPoints;
            fixed (int* pIndices = indices) 
            fixed (C4bV3f* pVertices = points.Vertices) {
                GL.InterleavedArrays(InterleavedArrayFormat.C4ubV3f, 0, (IntPtr)pVertices);
                if (points.Shading == ShadingStyles.Flat) {
                    GL.DisableClientState(EnableCap.ColorArray);
                    GL.Color4(points.FillColor);  
                }
                GL.Enable(EnableCap.PointSmooth); 
                GL.PointSize(points.Width); 
                GL.DrawElements(BeginMode.Points, indices.Length,
                                DrawElementsType.UnsignedInt, (IntPtr)pIndices);
                GL.Finish(); 
            }

        }

    }
}