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使用方法

? ImageTGA _Tga = new ImageTGA();

??????????? Bitmap _Bitmap = new Bitmap(124, 234);

??????????? this.DrawToBitmap(_Bitmap, new Rectangle(0, 0, 124, 234));

??????????? _Tga.Image = _Bitmap;

??????????? _Tga.SaveImage(@"C:\1.tga");

保存的時候只實現了非RLE的 8位 24位 32位 有需要的自己改寫下 SaveImageToTGA方法,不多說了 代碼不到300行

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using System;??
using System.Collections.Generic;??
using System.IO;??
using System.Text;??
using System.Drawing;??
using System.Drawing.Imaging;??
using System.Runtime.InteropServices;??
?
namespace Zgke.MyImage.ImageFile??
{??
??? /// <summary>??
??? /// Targa文件??
??? /// zgke@sina.com??
??? /// qq:116149??
??? /// </summary>??
??? public class ImageTGA??
??? {??
??????? public ImageTGA()??
??????? {??
??????????????
??????? }??
?
??????? public ImageTGA(string p_FileFullName)??
??????? {??
??????????? if (System.IO.File.Exists(p_FileFullName))??
??????????? {??
??????????????? LoadData(File.ReadAllBytes(p_FileFullName));??
??????????? }??????????????
??????? }?
?
??????? #region 屬性??
??????? /// <summary>??
??????? /// ID區域大小 默認為0??
??????? /// </summary>??
??????? private byte m_IDSize = 0;??
??????? /// <summary>??
??????? /// 色彩表類型 默認為0??
??????? /// </summary>??
??????? private byte m_ColorTableType = 0;??
??????? /// <summary>??
??????? /// 色彩表類型 默認為2??
??????? /// </summary>??
??????? private byte m_ImageType = 2;??
??????? /// <summary>??
??????? /// 色彩表類型開始位置??
??????? /// </summary>??
??????? private ushort m_ColorTableIndex = 0;??
??????? /// <summary>??
??????? /// 色彩表長度??
??????? /// </summary>??
??????? private ushort m_ColorTableCount = 0;??
??????? /// <summary>??
??????? /// 色彩表大小??
??????? /// </summary>??
??????? private byte m_ColorTableSize = 24;??
??????? /// <summary>??
??????? /// 色彩表類型開始位置??
??????? /// </summary>??
??????? private ushort m_ImageX = 0;??
??????? /// <summary>??
??????? /// 色彩表長度??
??????? /// </summary>??
??????? private ushort m_ImageY = 0;??
??????? /// <summary>??
??????? /// 色彩表類型開始位置??
??????? /// </summary>??
??????? private ushort m_ImageWidth = 0;??
??????? /// <summary>??
??????? /// 色彩表長度??
??????? /// </summary>??
??????? private ushort m_ImageHeight = 0;??
??????? /// <summary>??
??????? /// 每像素位數??
??????? /// </summary>??
??????? private byte m_PixSize = 0;??
??????? /// <summary>??
??????? /// 描述占位符??
??????? /// </summary>??
??????? private byte m_Remark = 0;??
??????? /// <summary>??
??????? /// 讀的位置??
??????? /// </summary>??
??????? private uint m_ReadIndex = 0;?????
??????? /// <summary>??
??????? /// 圖形??
??????? /// </summary>??
??????? private Bitmap m_Image;?
??????? #endregion??
?
??????? /// <summary>??
??????? /// 圖形??
??????? /// </summary>??
??????? public Bitmap Image??
??????? {??
??????????? get?
??????????? {??
??????????????? return m_Image;??
??????????? }??
??????????? set?
??????????? {??
??????????????? m_Image = value;??
??????????????? if (value != null)??
??????????????? {??
??????????????????? switch (value.PixelFormat)??
??????????????????? {??
??????????????????????? case PixelFormat.Format8bppIndexed:??
??????????????????????????? m_ColorTableType = 1;??
??????????????????????????? m_ImageType = 1;??
??????????????????????????? m_ColorTableCount = 256;??
??????????????????????????? m_PixSize = 8;??
??????????????????????????? m_Remark = 32;??
??????????????????????????? break;??
??????????????????????? case PixelFormat.Format32bppArgb:??
??????????????????????????? m_ColorTableType = 0;??
??????????????????????????? m_ImageType = 2;??
??????????????????????????? m_ColorTableCount = 0;??
??????????????????????????? m_PixSize = 32;??
??????????????????????????? m_Remark = 32;??
??????????????????????????? break;??
??????????????????????? default:??
??????????????????????????? m_ColorTableType = 0;??
??????????????????????????? m_ImageType = 2;??
??????????????????????????? m_ColorTableCount = 0;??
??????????????????????????? m_PixSize = 24;??
??????????????????????????? m_Remark = 32;??
??????????????????????????? break;??
??????????????????? }??
??????????????????? m_ImageWidth = (ushort)value.Width;??
??????????????????? m_ImageHeight = (ushort)value.Height;??
??????????????? }??
??????????? }??
??????? }??
?
??????? /// <summary>??
??????? /// 獲取數據??
??????? /// </summary>??
??????? /// <param name="p_TGABytes"></param>??
??????? private void LoadData(byte[] p_TGABytes)??
??????? {??
??????????? m_IDSize = p_TGABytes[0];??
??????????? m_ColorTableType = p_TGABytes[1];??
??????????? m_ImageType = p_TGABytes[2];??
??????????? m_ColorTableIndex = BitConverter.ToUInt16(p_TGABytes, 3);??
??????????? m_ColorTableCount = BitConverter.ToUInt16(p_TGABytes, 5);??
??????????? m_ColorTableSize = p_TGABytes[7];??
??????????? m_ImageX = BitConverter.ToUInt16(p_TGABytes, 8);??
??????????? m_ImageY = BitConverter.ToUInt16(p_TGABytes, 10);??
??????????? m_ImageWidth = BitConverter.ToUInt16(p_TGABytes, 12);??
??????????? m_ImageHeight = BitConverter.ToUInt16(p_TGABytes, 14);??
??????????? m_PixSize = p_TGABytes[16];??
??????????? m_Remark = p_TGABytes[17];??
??????????? m_ReadIndex = 18;??
??????????? LoadImage(p_TGABytes);??
??????? }??
?
??????? private void LoadImage(byte[] p_TAGBytes)??
??????? {??
??????????? switch (m_PixSize)??
??????????? {??
??????????????? case 24:??
??????????????????? m_Image = new Bitmap(m_ImageWidth, m_ImageHeight, PixelFormat.Format24bppRgb);??
??????????????????? LoadImageNotRLE(p_TAGBytes, 3);??
??????????????????? break;??
??????????????? case 32:??
??????????????????? m_Image = new Bitmap(m_ImageWidth, m_ImageHeight, PixelFormat.Format24bppRgb);??
??????????????????? LoadImageNotRLE(p_TAGBytes, 4);??
??????????????????? break;??
??????????????? case 8:??
??????????????????? m_Image = new Bitmap(m_ImageWidth, m_ImageHeight, PixelFormat.Format8bppIndexed);??
??????????????????? ColorPalette _Palette = m_Image.Palette;??
??????????????????? for (int i = 0; i != m_ColorTableCount; i++)??
??????????????????? {??
??????????????????????? _Palette.Entries[i] = Color.FromArgb(255, p_TAGBytes[m_ReadIndex + 2], p_TAGBytes[m_ReadIndex + 1], p_TAGBytes[m_ReadIndex]);??
??????????????????????? m_ReadIndex += 3;??
??????????????????? }??
??????????????????? m_Image.Palette = _Palette;??
??????????????????? LoadImageNotRLE(p_TAGBytes, 1);??
??????????????????? break;??
??????????? }??
??????? }??
?
??????? /// <summary>??
??????? /// 獲取非RLE壓縮的圖形??
??????? /// </summary>??
??????? /// <param name="p_TagBytes"></param>??
??????? /// <param name="p_Size"></param>??
??????? private void LoadImageNotRLE(byte[] p_TagBytes, int p_Size)??
??????? {??
??????????? int _Index = 0;??
??????????? PixelFormat _Format = PixelFormat.Format24bppRgb;??
??????????? switch (p_Size)??
??????????? {??
??????????????? case 3:??
??????????????????? _Format = PixelFormat.Format24bppRgb;??
??????????????????? break;??
??????????????? case 4:??
??????????????????? _Format = PixelFormat.Format32bppArgb;??
??????????????????? break;??
??????????????? case 1:??
??????????????????? _Format = PixelFormat.Format8bppIndexed;??
??????????????????? break;??
??????????? }??
??????????? BitmapData _ImageData = m_Image.LockBits(new Rectangle(0, 0, m_ImageWidth, m_ImageHeight), ImageLockMode.ReadWrite, _Format);??
??????????? byte[] _ValueBytes = new byte[_ImageData.Stride * _ImageData.Height];??
??????????? for (int i = 0; i != _ImageData.Height; i++)??
??????????? {??
??????????????? _Index = _ImageData.Stride * i;??
?
??????????????? Array.Copy(p_TagBytes, m_ReadIndex, _ValueBytes, _Index, _ImageData.Width * p_Size);??
??????????????? m_ReadIndex += (uint)_ImageData.Width * (uint)p_Size;??
??????????? }??
??????????? Marshal.Copy(_ValueBytes, 0, _ImageData.Scan0, _ValueBytes.Length);??
??????????? m_Image.UnlockBits(_ImageData);??
??????? }??
?
??????? /// <summary>??
??????? /// 保存圖形為TGA??
??????? /// </summary>??
??????? /// <returns></returns>??
??????? private byte[] SaveImageToTGA()??
??????? {??
??????????? if (m_Image == null) return null;??
??????????? MemoryStream _ImageMemory = new MemoryStream();??
??????????? _ImageMemory.WriteByte(m_IDSize);??
??????????? _ImageMemory.WriteByte(m_ColorTableType);??
??????????? _ImageMemory.WriteByte(m_ImageType);??
??????????? _ImageMemory.Write(BitConverter.GetBytes(m_ColorTableIndex), 0, 2);??
??????????? _ImageMemory.Write(BitConverter.GetBytes(m_ColorTableCount), 0, 2);??
??????????? _ImageMemory.WriteByte(m_ColorTableSize);??
??????????? _ImageMemory.Write(BitConverter.GetBytes(m_ImageX), 0, 2);??
??????????? _ImageMemory.Write(BitConverter.GetBytes(m_ImageY), 0, 2);??
??????????? _ImageMemory.Write(BitConverter.GetBytes(m_ImageWidth), 0, 2);??
??????????? _ImageMemory.Write(BitConverter.GetBytes(m_ImageHeight), 0, 2);??
??????????? _ImageMemory.WriteByte(m_PixSize);??
??????????? _ImageMemory.WriteByte(m_Remark);??
??????????? int _ColorSize = 0;??
??????????? Bitmap _SaveBitmap = m_Image;??
??????????? switch (_SaveBitmap.PixelFormat)??
??????????? {??
??????????????? case PixelFormat.Format24bppRgb:??
??????????????????? _ColorSize = 3;??
??????????????????? break;??
??????????????? case PixelFormat.Format8bppIndexed:??
??????????????????? _ColorSize = 1;??
??????????????????? for (int i = 0; i != m_ColorTableCount; i++)??
??????????????????? {??
??????????????????????? _ImageMemory.WriteByte(m_Image.Palette.Entries[i].B);??
??????????????????????? _ImageMemory.WriteByte(m_Image.Palette.Entries[i].G);??
??????????????????????? _ImageMemory.WriteByte(m_Image.Palette.Entries[i].R);??
??????????????????? }??
??????????????????? break;??
??????????????? case PixelFormat.Format32bppArgb:??
??????????????????? _ColorSize = 4;??
??????????????????? break;??
??????????????? default:??
??????????????????? _SaveBitmap = new Bitmap(m_Image.Width, m_Image.Height, PixelFormat.Format24bppRgb);??
??????????????????? Graphics _Graphics = Graphics.FromImage(_SaveBitmap);??
??????????????????? _Graphics.DrawImage(m_Image, new Rectangle(0, 0, _SaveBitmap.Width, _SaveBitmap.Height));??
??????????????????? _Graphics.Dispose();??
??????????????????? _ColorSize = 3;??
??????????????????? break;??
??????????? }??
??????????? BitmapData _ImageData = _SaveBitmap.LockBits(new Rectangle(0, 0, _SaveBitmap.Width, _SaveBitmap.Height), ImageLockMode.ReadWrite, _SaveBitmap.PixelFormat);??
??????????? byte[] _ValueBytes = new byte[_ImageData.Stride * _ImageData.Height];??
??????????? Marshal.Copy(_ImageData.Scan0, _ValueBytes, 0, _ValueBytes.Length);??
??????????? _SaveBitmap.UnlockBits(_ImageData);??
??????????? int _Index = 0;??
??????????? for (int i = 0; i != _ImageData.Height; i++)??
??????????? {??
??????????????? _Index = _ImageData.Stride * i;??
??????????????? _ImageMemory.Write(_ValueBytes, _Index, _ColorSize * _ImageData.Width);??
??????????? }??
??????????? return _ImageMemory.ToArray();??
??????? }??
?
??????? /// <summary>??
??????? /// 保存圖形到文件??
??????? /// </summary>??
??????? /// <param name="p_FileFullName"></param>??
??????? public void SaveImage(string p_FileFullName)??
??????? {??
??????????? byte[] _ValueBytes = SaveImageToTGA();??
??????????? if (_ValueBytes != null) File.WriteAllBytes(p_FileFullName, _ValueBytes);??
??????? }?????????
?
??? }??
}?

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本文來自CSDN博客，轉載請標明出處：http://blog.csdn.net/zgke/archive/2009/10/14/4667499.aspx

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轉載于:https://www.cnblogs.com/JohnXIe/archive/2011/06/02/2068555.html

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