C#解析PCX图形文件..

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