学步园

2009-05-20  新添了两个方法  一个保存  另外支持8位色的PCX

连接　　http://blog.csdn.net/zgke/archive/2009/05/20/4204090.aspx

图片来源  ACDESS 3.1 转换出来的PCX文件..

其实分析了下....PCX的24位图还真有意思....先相素红--绿--蓝 ..每个元素都是RLE压缩 到.NET下还的做个标记获取一行相素的循环3次.频繁的跳转..PCX24位图也太个性了..

哎..... 我只实现了 24位PCX文件生成 ..有空再写把...

至于PCX 8位 1位这写的读取 有空我也会写下..目前的问题是没有PCX 8位的文件...

使用方法

 Zgke.MyImage.ImageFile.ImagePcx _Pcx = new Zgke.MyImage.ImageFile.ImagePcx(@"C:/temp/6.pcx");
       
            pictureBox1.Image = _Pcx.PcxImage;

..超级简单把...

全部代码也不多

using System;<br /> using System.Collections.Generic;<br /> using System.Text;<br /> using System.Drawing;<br /> using System.Drawing.Imaging;<br /> using System.IO;<br /> using System.Runtime.InteropServices;</p> <p>namespace Zgke.MyImage.ImageFile<br /> {<br /> /// <summary><br /> /// PCX操作类<br /> /// zgke@sina.com<br /> /// qq:116149<br /> /// </summary><br /> public class ImagePcx<br /> {<br /> /// <summary><br /> /// PCX文件头<br /> /// </summary><br /> private class PCXHEAD<br /> {<br /> public byte[] m_Data = new byte[128];</p> <p> /// <summary><br /> /// 文件头必须为 0A;<br /> /// </summary><br /> public byte Manufacturer { get { return m_Data[0]; } }<br /> /// <summary><br /> /// 0：PC Paintbrush 2.5 版 　　2：PC Paintbrush 2.8 版　　5：PC Paintbrush 3.0 版<br /> /// </summary><br /> public byte Version { get { return m_Data[1]; } set { m_Data[1] = value; } }<br /> /// <summary><br /> /// 其值为1时表示采用RLE压缩编码的方法<br /> /// </summary><br /> public byte Encoding { get { return m_Data[2]; } set { m_Data[2] = value; } }<br /> /// <summary><br /> /// 每个相素的位数<br /> /// </summary><br /> public byte Bits_Per_Pixel { get { return m_Data[3]; } set { m_Data[3] = value; } }</p> <p> public ushort Xmin { get { return BitConverter.ToUInt16(m_Data, 4); } set { SetUshort(4, value); } }<br /> public ushort Ymin { get { return BitConverter.ToUInt16(m_Data, 6); } set { SetUshort(6, value); } }<br /> public ushort Xmax { get { return BitConverter.ToUInt16(m_Data, 8); } set { SetUshort(8, value); } }<br /> public ushort Ymax { get { return BitConverter.ToUInt16(m_Data, 10); } set { SetUshort(10, value); } }<br /> /// <summary><br /> /// 水平分辨率<br /> /// </summary><br /> public ushort Hres1 { get { return BitConverter.ToUInt16(m_Data, 12); } set { SetUshort(12, value); } }<br /> /// <summary><br /> /// 垂直分辨率<br /> /// </summary><br /> public ushort Vres1 { get { return BitConverter.ToUInt16(m_Data, 14); } set { SetUshort(14, value); } }</p> <p> public byte[] Palette<br /> {<br /> get<br /> {<br /> byte[] _Palette = new byte[48];<br /> Array.Copy(m_Data,16,_Palette,0,48);<br /> return _Palette;<br /> }<br /> set<br /> {<br /> if(value.Length!=48)throw new Exception("错误的byte[]长度不是48");<br /> Array.Copy(value, 0, m_Data, 16, 48);<br /> }</p> <p> }<br /> /// <summary><br /> /// 位知<br /> /// </summary><br /> public byte Reserved { get { return m_Data[64]; } set { m_Data[64] = value; } }<br /> /// <summary><br /> /// 未知<br /> /// </summary><br /> public byte Colour_Planes { get { return m_Data[65]; } set { m_Data[65] = value; } }<br /> /// <summary><br /> /// 解码缓冲区<br /> /// </summary><br /> public ushort Bytes_Per_Line { get { return BitConverter.ToUInt16(m_Data, 66); } set { SetUshort(66, value); } }<br /> /// <summary><br /> /// 位知<br /> /// </summary><br /> public ushort Palette_Type { get { return BitConverter.ToUInt16(m_Data, 68); } set { SetUshort(68, value); } }<br /> /// <summary><br /> /// 填充<br /> /// </summary><br /> public byte[] Filler<br /> {<br /> get<br /> {<br /> byte[] m_Bytes = new byte[58];<br /> Array.Copy(m_Data, 70, m_Bytes, 0, 58);<br /> return m_Bytes;<br /> }<br /> }</p> <p> public PCXHEAD(byte[] p_Data)<br /> {<br /> Array.Copy(p_Data, m_Data, 128);<br /> }</p> <p> public PCXHEAD()<br /> {<br /> m_Data[0] = 0xA;<br /> Version = 0x5;<br /> Encoding = 0x1;<br /> Bits_Per_Pixel = 0x8;<br /> Palette = new byte[] { 0x00, 0x00, 0xCD, 0x00, 0x90, 0xE7, 0x37, 0x01, 0x80, 0xF6, 0x95, 0x7C, 0x28, 0xFB, 0x95, 0x7C, 0xFF, 0xFF, 0xFF, 0xFF, 0x23, 0xFB, 0x95, 0x7C, 0xB3, 0x16, 0x34, 0x7C, 0x00, 0x00, 0xCD, 0x00, 0x00, 0x00, 0x00, 0x00, 0xB8, 0x16, 0x34, 0x7C, 0x64, 0xF3, 0x37, 0x01, 0xD8, 0x54, 0xB8, 0x00 };<br /> Reserved = 0x01;<br /> Colour_Planes = 0x03;<br /> Palette_Type = 1;<br /> }</p> <p> public int Width { get { return Xmax - Xmin + 1; } }</p> <p> public int Height { get { return Ymax - Ymin + 1; } }</p> <p> /// <summary><br /> /// 设置16位数据保存到数据表<br /> /// </summary><br /> /// <param name="p_Index">索引</param><br /> /// <param name="p_Data">数据</param><br /> private void SetUshort(int p_Index, ushort p_Data)<br /> {<br /> byte[] _ValueBytes = BitConverter.GetBytes(p_Data);<br /> m_Data[p_Index] = _ValueBytes[0];<br /> m_Data[p_Index + 1] = _ValueBytes[1];<br /> }<br /> }</p> <p> private PCXHEAD m_Head = new PCXHEAD();</p> <p> private Bitmap m_Image;</p> <p> /// <summary><br /> /// 获取图形<br /> /// </summary><br /> public Bitmap PcxImage { get { return m_Image; } set { m_Image = value; } }</p> <p> public ImagePcx(string p_FileFullName)<br /> {<br /> if (!File.Exists(p_FileFullName)) return;<br /> Load(File.ReadAllBytes(p_FileFullName));<br /> }</p> <p> public ImagePcx(byte[] p_Data)<br /> {<br /> Load(p_Data);<br /> }</p> <p> public ImagePcx()<br /> { </p> <p> }</p> <p> /// <summary><br /> /// 开始获取数据<br /> /// </summary><br /> /// <param name="p_Bytes">PCX文件信息</param><br /> private void Load(byte[] p_Bytes)<br /> {<br /> byte[] _Bytes = p_Bytes;<br /> if (_Bytes[0] != 0x0A) return;<br /> m_Head = new PCXHEAD(_Bytes);<br /> m_ReadIndex = 128;<br /> PixelFormat _PixFormate = PixelFormat.Format24bppRgb;<br /> if (m_Head.Colour_Planes == 1) _PixFormate = PixelFormat.Format8bppIndexed;</p> <p> m_Image = new Bitmap(m_Head.Width, m_Head.Height, _PixFormate);<br /> BitmapData _Data = m_Image.LockBits(new Rectangle(0, 0, m_Image.Width, m_Image.Height), ImageLockMode.ReadWrite, _PixFormate);<br /> byte[] _BmpData = new byte[_Data.Stride * _Data.Height];</p> <p> for (int i = 0; i != m_Head.Height; i++)<br /> {<br /> byte[] _RowColorValue=new byte[0];<br /> switch (m_Head.Colour_Planes)<br /> {<br /> case 3: //24位<br /> _RowColorValue = LoadPCXLine24(_Bytes);<br /> break;<br /> case 1: //256色<br /> _RowColorValue = LoadPCXLine8(_Bytes);<br /> break;<br /> }<br /> int _Count = _RowColorValue.Length;<br /> Array.Copy(_RowColorValue, 0, _BmpData, i * _Data.Stride, _Count);<br /> }<br /> Marshal.Copy(_BmpData, 0, _Data.Scan0, _BmpData.Length);<br /> m_Image.UnlockBits(_Data);</p> <p> switch (m_Head.Colour_Planes)<br /> {<br /> case 1:<br /> ColorPalette _Palette = m_Image.Palette;<br /> m_ReadIndex = p_Bytes.Length - 256 * 3;<br /> for (int i = 0; i != 256; i++)<br /> {<br /> _Palette.Entries[i] = Color.FromArgb(p_Bytes[m_ReadIndex], p_Bytes[m_ReadIndex + 1], p_Bytes[m_ReadIndex + 2]);<br /> m_ReadIndex += 3;<br /> }<br /> m_Image.Palette = _Palette;<br /> break;<br /> }<br /> }</p> <p> /// <summary><br /> /// 保存成PCX文件<br /> /// </summary><br /> /// <param name="p_FileFullName">完成路径</param><br /> public void Save(string p_FileFullName)<br /> {<br /> if (m_Image == null) return;<br /> m_Head.Xmax = (ushort)(m_Image.Width - 1);<br /> m_Head.Ymax = (ushort)(m_Image.Height - 1);<br /> m_Head.Vres1 = (ushort)(m_Head.Xmax + 1);<br /> m_Head.Hres1 = (ushort)(m_Head.Ymax + 1);<br /> m_Head.Bytes_Per_Line = (ushort)m_Head.Width;</p> <p> MemoryStream _SaveData = new MemoryStream();</p> <p> switch (m_Image.PixelFormat)<br /> {<br /> #region 8位<br /> case PixelFormat.Format8bppIndexed:<br /> m_Head.Colour_Planes = 1;<br /> BitmapData _ImageData = m_Image.LockBits(new Rectangle(0, 0, m_Head.Width, m_Head.Height), ImageLockMode.ReadOnly, m_Image.PixelFormat);<br /> byte[] _ImageByte = new byte[_ImageData.Stride * _ImageData.Height];<br /> Marshal.Copy(_ImageData.Scan0, _ImageByte, 0, _ImageByte.Length);<br /> m_Image.UnlockBits(_ImageData);</p> <p> m_SaveIndex = 0;<br /> byte[] _RowBytes = SavePCXLine8(_ImageByte);<br /> _SaveData.Write(_RowBytes, 0, _RowBytes.Length);</p> <p> _SaveData.WriteByte(0x0C);<br /> for (int i = 0; i != 256; i++)<br /> {<br /> _SaveData.WriteByte((byte)m_Image.Palette.Entries[i].R);<br /> _SaveData.WriteByte((byte)m_Image.Palette.Entries[i].G);<br /> _SaveData.WriteByte((byte)m_Image.Palette.Entries[i].B);<br /> }<br /> break;<br /> #endregion<br /> #region 其他都按24位保存<br /> default:<br /> m_Head.Colour_Planes = 3;<br /> Bitmap _Bitamp24 = new Bitmap(m_Head.Width, m_Head.Height, PixelFormat.Format24bppRgb);<br /> Graphics _Graphics = Graphics.FromImage(_Bitamp24);<br /> _Graphics.DrawImage(m_Image, 0, 0, m_Head.Width, m_Head.Height);<br /> _Graphics.Dispose();<br /> BitmapData _ImageData24 = _Bitamp24.LockBits(new Rectangle(0, 0, m_Head.Width, m_Head.Height), ImageLockMode.ReadOnly, _Bitamp24.PixelFormat);<br /> byte[] _ImageByte24 = new byte[_ImageData24.Stride * _ImageData24.Height];<br /> Marshal.Copy(_ImageData24.Scan0, _ImageByte24, 0, _ImageByte24.Length);<br /> _Bitamp24.UnlockBits(_ImageData24);<br /> m_SaveIndex = 0;<br /> for (int i = 0; i != _ImageData24.Height; i++)<br /> {<br /> byte[] _RowBytes24 = SavePCXLine24(_ImageByte24);<br /> _SaveData.Write(_RowBytes24, 0, _RowBytes24.Length);<br /> }<br /> _SaveData.WriteByte(0x0C);<br /> _SaveData.Write(new byte[768], 0, 768);</p> <p> break;<br /> #endregion<br /> }<br /> FileStream _FileStream = new FileStream(p_FileFullName, FileMode.Create, FileAccess.Write);<br /> _FileStream.Write(m_Head.m_Data, 0, 128);<br /> byte[] _FileData = _SaveData.ToArray();<br /> _FileStream.Write(_FileData, 0, _FileData.Length);<br /> _FileStream.Close();<br /> }</p> <p> #region 取数据行<br /> /// <summary><br /> /// 读取标记<br /> /// </summary><br /> private int m_ReadIndex = 0;<br /> /// <summary><br /> /// 获取PCX一行信息 24位色<br /> /// </summary><br /> /// <param name="p_Data">数据</param><br /> /// <returns>BMP的行信息</returns><br /> private byte[] LoadPCXLine24(byte[] p_Data)<br /> {<br /> int _LineWidth = m_Head.Bytes_Per_Line;<br /> byte[] _ReturnBytes = new byte[_LineWidth * 3];<br /> int _EndBytesLength = p_Data.Length - 1;<br /> int _WriteIndex = 2;<br /> int _ReadIndex = 0;<br /> while (true)<br /> {<br /> if (m_ReadIndex > _EndBytesLength) break; //判断行扫描结束返回码<br /> byte _Data = p_Data[m_ReadIndex];</p> <p> if (_Data > 0xC0)<br /> {<br /> int _Count = _Data - 0xC0;<br /> m_ReadIndex++;<br /> for (int i = 0; i != _Count; i++)<br /> {<br /> if (i + _ReadIndex >= _LineWidth) //2009-6-12 RLE数据 会换行<br /> {<br /> _WriteIndex--;<br /> _ReadIndex = 0;<br /> _Count = _Count - i;<br /> i = 0;<br /> }<br /> int _RVA = ((i + _ReadIndex) * 3) + _WriteIndex;<br /> _ReturnBytes[_RVA] = p_Data[m_ReadIndex];<br /> }<br /> _ReadIndex += _Count;<br /> m_ReadIndex++;<br /> }<br /> else<br /> {<br /> int _RVA = (_ReadIndex * 3) + _WriteIndex;<br /> _ReturnBytes[_RVA] = _Data;<br /> m_ReadIndex++;<br /> _ReadIndex++;<br /> }<br /> if (_ReadIndex >= _LineWidth)<br /> {<br /> _WriteIndex--;<br /> _ReadIndex = 0;<br /> }</p> <p> if (_WriteIndex == -1) break;<br /> }<br /> return _ReturnBytes;<br /> }<br /> /// <summary><br /> /// 获取PCX一行信息 8位色<br /> /// </summary><br /> /// <param name="p_Data">数据</param><br /> /// <returns>BMP的行信息</returns><br /> private byte[] LoadPCXLine8(byte[] p_Data)<br /> {<br /> int _LineWidth = m_Head.Bytes_Per_Line;<br /> byte[] _ReturnBytes = new byte[_LineWidth];<br /> int _EndBytesLength = p_Data.Length - 1 - (256 * 3); //数据行不够就不执行了。。<br /> int _ReadIndex = 0;<br /> while (true)<br /> {<br /> if (m_ReadIndex > _EndBytesLength) break; //判断行扫描结束返回码 </p> <p> byte _Data = p_Data[m_ReadIndex];<br /> if (_Data > 0xC0)<br /> {<br /> int _Count = _Data - 0xC0;<br /> m_ReadIndex++;<br /> for (int i = 0; i != _Count; i++)<br /> {<br /> _ReturnBytes[i + _ReadIndex] = p_Data[m_ReadIndex];<br /> }<br /> _ReadIndex += _Count;<br /> m_ReadIndex++;<br /> }<br /> else<br /> {<br /> _ReturnBytes[_ReadIndex] = _Data;<br /> m_ReadIndex++;<br /> _ReadIndex++;<br /> }<br /> if (_ReadIndex >= _LineWidth) break;<br /> }<br /> return _ReturnBytes;<br /> }<br /> #endregion</p> <p> #region 存数据行<br /> private int m_SaveIndex = 0;<br /> /// <summary><br /> /// 返回PCX8位色数据<br /> /// </summary><br /> /// <param name="p_Data">原始数据</param><br /> /// <returns>数据</returns><br /> private byte[] SavePCXLine8(byte[] p_Data)<br /> {<br /> MemoryStream _Memory = new MemoryStream();<br /> byte _Value = p_Data[m_SaveIndex];<br /> byte _Count = 1;<br /> for (int i = 1; i != p_Data.Length; i++)<br /> {<br /> byte _Temp = p_Data[m_SaveIndex+i];<br /> if (_Temp == _Value)<br /> {<br /> _Count++;<br /> if (_Count == 63)<br /> {<br /> _Memory.WriteByte(0xFF);<br /> _Memory.WriteByte(_Value);<br /> _Count = 0;<br /> }<br /> }<br /> else<br /> {<br /> if (_Count == 1 && _Value< 0xC0 && _Value!=0x00)<br /> {<br /> _Memory.WriteByte(_Value);<br /> }<br /> else<br /> {<br /> _Memory.WriteByte((byte)(0xC0 + _Count));<br /> _Memory.WriteByte(_Value);<br /> }<br /> _Count = 1;<br /> _Value = _Temp;<br /> }<br /> }<br /> if (_Count == 1 && _Value < 0xC0 && _Value != 0x00)<br /> {<br /> _Memory.WriteByte(_Value);<br /> }<br /> else<br /> {<br /> _Memory.WriteByte((byte)(0xC0 + _Count));<br /> _Memory.WriteByte(_Value);<br /> }<br /> return _Memory.ToArray();<br /> }<br /> /// <summary><br /> /// 返回24位色数据<br /> /// </summary><br /> /// <param name="p_Data">原始数据</param><br /> /// <returns>数据</returns><br /> private byte[] SavePCXLine24(byte[] p_Data)<br /> {<br /> MemoryStream _Read = new MemoryStream();<br /> MemoryStream _Green = new MemoryStream();<br /> MemoryStream _Blue = new MemoryStream();</p> <p> for (int i = 0; i != m_Head.Width; i++)<br /> {<br /> _Read.WriteByte(p_Data[m_SaveIndex+2]);<br /> _Green.WriteByte(p_Data[m_SaveIndex+1]);<br /> _Blue.WriteByte(p_Data[m_SaveIndex]);<br /> m_SaveIndex += 3;<br /> }</p> <p> MemoryStream _All = new MemoryStream();<br /> int _OleIndex = m_SaveIndex;<br /> m_SaveIndex = 0;<br /> byte[] _Bytes = SavePCXLine8(_Read.ToArray());<br /> _All.Write(_Bytes, 0, _Bytes.Length);<br /> m_SaveIndex = 0;<br /> _Bytes = SavePCXLine8(_Green.ToArray());<br /> _All.Write(_Bytes, 0, _Bytes.Length);<br /> m_SaveIndex = 0;<br /> _Bytes = SavePCXLine8(_Blue.ToArray());<br /> _All.Write(_Bytes, 0, _Bytes.Length);<br /> m_SaveIndex = _OleIndex;<br /> return _All.ToArray();<br /> }<br /> #endregion</p> <p> }<br /> }