/* 
 * PROJECT: NyARToolkitCSUtils NyARToolkit for C# 支援ライブラリ
 * --------------------------------------------------------------------------------
 * The MIT License
 * Copyright (c) 2008 nyatla
 * airmail(at)ebony.plala.or.jp
 * http://nyatla.jp/nyartoolkit/
 * 
 * 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.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 */
using System;
using System.Drawing;
using System.Collections.Generic;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
using NyARToolkitCSUtils.Raster;
using System.Runtime.InteropServices;
using System.Diagnostics;
using jp.nyatla.nyartoolkit.cs.core;

namespace NyARToolkitCSUtils.Direct3d
{
    /* DsXRGB32Rasterのラスタデータを取り込むことが出来るSurfaceです。
     * このSurfaceはそのままARToolKitの背景描画に使います。
     */
    public class NyARSurface_XRGB32
    {
        private int m_width;
        private int m_height;
        private Microsoft.DirectX.Direct3D.Device m_ref_dev;
        private Surface m_surface;
        public Surface d3d_surface
        {
            get { return this.m_surface; }
        }

        /* i_width x i_heightのテクスチャを格納するインスタンスを生成します。
         * 確保されるテクスチャのサイズは指定したサイズと異なり、i_width x i_heightのサイズを超える
         * 2のべき乗サイズになります。
         * 
         */
        public NyARSurface_XRGB32(Microsoft.DirectX.Direct3D.Device i_dev, int i_width, int i_height)
        {
            this.m_ref_dev = i_dev;

            this.m_height = i_height;
            this.m_width = i_width;

            this.m_surface = i_dev.CreateOffscreenPlainSurface(i_width, i_height, Format.X8R8G8B8, Pool.Default);

            //OK、完成だ。
            return;
        }
        /* DsXRGB32Rasterの内容を保持しているサーフェイスにコピーします。
         */
        public void CopyFromXRGB32(DsXRGB32Raster i_sample)
        {
            Debug.Assert(i_sample.getBufferReader().isEqualBufferType(INyARBufferReader.BUFFERFORMAT_BYTE1D_B8G8R8X8_32));
            GraphicsStream gs = this.m_surface.LockRectangle(LockFlags.None);
            int cp_size = this.m_width * 4;
            int s_idx=0;
            int d_idx = (this.m_height - 1) * cp_size;
            for(int i=this.m_height-1;i>=0;i--){
                //どう考えてもポインタです。
                Marshal.Copy((byte[])i_sample.getBufferReader().getBuffer(),s_idx,(IntPtr)((int)gs.InternalData+d_idx),cp_size);
                s_idx += cp_size;
                d_idx -= cp_size;
            }
            this.m_surface.UnlockRectangle();

            return;
        }

    }
}
