C# 解析 RAS文件 SUM 光栅文件图象的代码


            使用方法:复制代码 代码如下: ImageRas _Ras = new ImageRas(@"D:\temp\test.ras"); pictureBox1.Image = _Ras.Image; _Ras.SaveRas(@"d:\temp\OK.ras");  我只实现了24位色和8位色 这个结构也太简单了。只有文件头和数据区 。就是8位色的色彩表有些特殊 先是红色表 绿色表 蓝色表 平时都是 RGB、RGB 这样放 这东西居然RRRR.....GGG......B.... 不知道怎么想的。 项目多了很少有时间做这些东西了。下个目标是IFF文件 全部代码 复制代码 代码如下: using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; using System.Drawing.Imaging; using System.Drawing; using System.IO; namespace Zgke.MyImage.ImageFile { /// <summary> /// SUN光栅图形 RAS /// zgke@sina.com /// qq:116149 /// </summary> public class ImageRas { public ImageRas(string p_ImageFile) { if (System.IO.File.Exists(p_ImageFile)) { LoadImage(System.IO.File.ReadAllBytes(p_ImageFile)); } } public ImageRas() { } #region 私有 /// <summary> /// 文件头 956AA659 /// </summary> private uint m_Mageic = 0x956AA659; /// <summary> /// 宽 /// </summary> private uint m_Width = 0; /// <summary> /// 高 /// </summary> private uint m_Height = 0; /// <summary> /// 颜色深 /// </summary> private uint m_Depth = 0; /// <summary> /// 图形区域数据大小 /// </summary> private uint m_Length = 0; /// <summary> /// 数据类型 /// </summary> private uint m_Type = 0; /// <summary> /// 色彩图形类型 /// </summary> private uint m_MapType = 0; /// <summary> /// 色彩长度 /// </summary> private uint m_MapLength = 0; /// <summary> /// 颜色表 /// </summary> private Color[] m_ColorList = new Color[256]; /// <summary> /// 图形 /// </summary> private Bitmap m_Image; #endregion /// <summary> /// 获取图形 /// </summary> public Bitmap Image { get { return m_Image; } set { if (value != null) { m_Image = value; m_Width = (uint)value.Width; m_Height = (uint)value.Height; switch (value.PixelFormat) { case PixelFormat.Format8bppIndexed: break; case PixelFormat.Format32bppArgb: break; default: m_Depth = 24; break; } } } } /// <summary> /// 获取数据 /// </summary> /// <param name="p_ImageBytes"></param> private void LoadImage(byte[] p_ImageBytes) { if (BitConverter.ToUInt32(p_ImageBytes, 0) != m_Mageic) throw new Exception("文件头不正确！"); m_Width = BytesToUint(p_ImageBytes, 4); m_Height = BytesToUint(p_ImageBytes, 8); m_Depth = BytesToUint(p_ImageBytes, 12); m_Length = BytesToUint(p_ImageBytes, 16); m_Type = BytesToUint(p_ImageBytes, 20); m_MapType = BytesToUint(p_ImageBytes, 24); m_MapLength = BytesToUint(p_ImageBytes, 28); int _StarIndex = 32; switch (m_MapType) { case 1: int _ColorTable = (int)m_MapLength / 3; for (int i = 0; i != _ColorTable; i++) { m_ColorList[i] = Color.FromArgb(p_ImageBytes[_StarIndex], p_ImageBytes[_StarIndex + _ColorTable], p_ImageBytes[_StarIndex + (_ColorTable * 2)]); _StarIndex++; } _StarIndex += _ColorTable * 2; break; default: break; } LoadData(p_ImageBytes, _StarIndex); } /// <summary> /// 字节转换为UINT /// </summary> /// <param name="p_Value">字节数组</param> /// <param name="p_Index">开始位置</param> /// <returns></returns> private uint BytesToUint(byte[] p_Value, int p_Index) { byte[] _ValueBytes = new byte[4]; _ValueBytes[0] = p_Value[p_Index + 3]; _ValueBytes[1] = p_Value[p_Index + 2]; _ValueBytes[2] = p_Value[p_Index + 1]; _ValueBytes[3] = p_Value[p_Index]; return BitConverter.ToUInt32(_ValueBytes, 0); } /// <summary> /// 获取反转的BYTES /// </summary> /// <param name="p_Value"></param> /// <returns></returns> private byte[] UintToBytes(uint p_Value) { byte[] _ValueBytes = BitConverter.GetBytes(p_Value); Array.Reverse(_ValueBytes); return _ValueBytes; } /// <summary> /// 获取图形数据 /// </summary> /// <param name="p_ValueBytes">文件留</param> /// <param name="p_StarIndex">RGB留开始位置</param> private void LoadData(byte[] p_ValueBytes, int p_StarIndex) { PixelFormat _Format = PixelFormat.Format24bppRgb; switch (m_Depth) { case 8: _Format = PixelFormat.Format8bppIndexed; break; case 24: _Format = PixelFormat.Format24bppRgb; break; default: throw new Exception("未实现！"); } m_Image = new Bitmap((int)m_Width, (int)m_Height, _Format); BitmapData _Data = m_Image.LockBits(new Rectangle(0, 0, m_Image.Width, m_Image.Height), ImageLockMode.ReadWrite, m_Image.PixelFormat); byte[] _WriteBytes = new byte[_Data.Height * _Data.Stride]; int _StarIndex = 0; int _WriteIndex = 0; for (int i = 0; i != _Data.Height; i++) { _WriteIndex = i * _Data.Stride; _StarIndex = i * ((int)m_Length / (int)m_Height) + p_StarIndex; for (int z = 0; z != _Data.Width; z++) { switch (m_Depth) { case 8: _WriteBytes[_WriteIndex] = p_ValueBytes[_StarIndex]; _WriteIndex++; _StarIndex++; break; case 24: _WriteBytes[_WriteIndex] = p_ValueBytes[_StarIndex + 2]; _WriteBytes[_WriteIndex + 1] = p_ValueBytes[_StarIndex + 1]; _WriteBytes[_WriteIndex + 2] = p_ValueBytes[_StarIndex]; _WriteIndex += 3; _StarIndex += 3; break; } } } switch (m_Depth) { case 8: ColorPalette _Palette = m_Image.Palette; for (int i = 0; i != m_ColorList.Length; i++) { _Palette.Entries[i] = m_ColorList[i]; } m_Image.Palette = _Palette; break; default: break; } Marshal.Copy(_WriteBytes, 0, _Data.Scan0, _WriteBytes.Length); m_Image.UnlockBits(_Data); } /// <summary> /// 保存图形 /// </summary> /// <returns></returns> private byte[] SaveImageOfRas() { if (m_Image == null) return new byte[0]; MemoryStream _Stream = new MemoryStream(); _Stream.Write(BitConverter.GetBytes(m_Mageic), 0, 4); _Stream.Write(UintToBytes(m_Width), 0, 4); _Stream.Write(UintToBytes(m_Height), 0, 4); switch (m_Depth) { case 8: BitmapData _Data256 = m_Image.LockBits(new Rectangle(0, 0, m_Image.Width, m_Image.Height), ImageLockMode.ReadOnly, m_Image.PixelFormat); byte[] _DataBytes = new byte[_Data256.Stride * _Data256.Height]; int _Stride = _Data256.Stride; Marshal.Copy(_Data256.Scan0, _DataBytes, 0, _DataBytes.Length); m_Image.UnlockBits(_Data256); _Stream.Write(UintToBytes(8), 0, 4); uint _WidthCount = (uint)m_Image.Width; if (m_Image.Width % 2 != 0) _WidthCount = (uint)m_Image.Width + 1; uint _AllCount = _WidthCount * (uint)m_Image.Height; _Stream.Write(UintToBytes(_AllCount), 0, 4); _Stream.Write(UintToBytes(0), 0, 4); _Stream.Write(UintToBytes(1), 0, 4); _Stream.Write(UintToBytes(768), 0, 4); byte[] _RedBytes = new byte[256]; byte[] _GreenBytes = new byte[256]; byte[] _BlueBytes = new byte[256]; for (int i = 0; i != 256; i++) { _RedBytes[i] = m_Image.Palette.Entries[i].R; _GreenBytes[i] = m_Image.Palette.Entries[i].G; _BlueBytes[i] = m_Image.Palette.Entries[i].B; } _Stream.Write(_RedBytes, 0, _RedBytes.Length); _Stream.Write(_GreenBytes, 0, _GreenBytes.Length); _Stream.Write(_BlueBytes, 0, _BlueBytes.Length); byte[] _Write = new byte[_WidthCount]; for (int i = 0; i != m_Image.Height; i++) { Array.Copy(_DataBytes, i * _Stride, _Write, 0, _WidthCount); _Stream.Write(_Write, 0, _Write.Length); } break; default: Bitmap _NewBitmap = new Bitmap(m_Image.Width, m_Image.Height, PixelFormat.Format24bppRgb); Graphics _Graphics = Graphics.FromImage(_NewBitmap); _Graphics.DrawImage(m_Image, new Rectangle(0, 0, m_Image.Width, m_Image.Height)); _Graphics.Dispose(); BitmapData _Data24 = _NewBitmap.LockBits(new Rectangle(0, 0, _NewBitmap.Width, _NewBitmap.Height), ImageLockMode.ReadOnly, _NewBitmap.PixelFormat); byte[] _DataBytes24 = new byte[_Data24.Stride * _Data24.Height]; int _Stride24 = _Data24.Stride; Marshal.Copy(_Data24.Scan0, _DataBytes24, 0, _DataBytes24.Length); _NewBitmap.UnlockBits(_Data24); _Stream.Write(UintToBytes(24), 0, 4); uint _WidthCount24 = (uint)_NewBitmap.Width; if (_NewBitmap.Width % 2 != 0) _WidthCount24 = (uint)_NewBitmap.Width + 1; uint _AllCount24 = _WidthCount24 * (uint)_NewBitmap.Height * 3; _WidthCount24 = _WidthCount24 * 3; _Stream.Write(UintToBytes(_AllCount24), 0, 4); _Stream.Write(UintToBytes(0), 0, 4); _Stream.Write(UintToBytes(0), 0, 4); _Stream.Write(UintToBytes(0), 0, 4); byte[] _Write24 = new byte[0]; for (int i = 0; i != m_Image.Height; i++) { _Write24 = new byte[_WidthCount24]; int _WriteIndex = 0; int _StarIndex = i * _Stride24; for (int z = 0; z != m_Image.Width; z++) { _Write24[_WriteIndex] = _DataBytes24[_StarIndex + 2]; _Write24[_WriteIndex + 1] = _DataBytes24[_StarIndex + 1]; _Write24[_WriteIndex + 2] = _DataBytes24[_StarIndex]; _WriteIndex += 3; _StarIndex += 3; } _Stream.Write(_Write24, 0, _Write24.Length); } _NewBitmap.Dispose(); break; } byte[] _Return = _Stream.ToArray(); return _Return; } /// <summary> /// 保存图形到RAS文件 /// </summary> /// <param name="p_File"></param> public void SaveRas(string p_File) { byte[] _Value = SaveImageOfRas(); if (_Value.Length != 0) File.WriteAllBytes(p_File, _Value); } } }