C#打印小票可以与普通打印机一样，调用PrintDocument实现。也可以发送标注你的ESC指令实现。由于 调用PrintDocument类时，无法操作使用串口或TCP/IP接口连接的pos打印机，并且无法发送控制指令实现pos打印机的切纸、走纸等动作。因此个人建议使用ESC指令进行打印会更通用。
本类需要调用 ImageProcessor.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Threading;
using System.Drawing;
using System.Management;
using System.IO;
using LaisonTech.MediaLib;
using LaisonTech.CommonBLL;
using Microsoft.Win32.SafeHandles;
namespace LaisonTech.MediaLib
{
#region 结构体定义
[StructLayout(LayoutKind.Sequential)]
public struct OVERLAPPED
{
int Internal;
int InternalHigh;
int Offset;
int OffSetHigh;
int hEvent;
};
[StructLayout(LayoutKind.Sequential)]
public struct PRINTER_DEFAULTS
{
public int pDatatype;
public int pDevMode;
public int DesiredAccess;
}
///
/// 对齐方式
///
public enum eTextAlignMode
{
Left = 0,
Middle = 1,
Right = 2
}
#endregion
///
/// 小票打印类
/// 使用方法:
/// 1 GetPrinterList获取已经安装的所有打印机列表.
/// Open 打开指定打印机
/// 2 控制打印机动作、执行打印内容之前，必须先调用StartPrint，准备向打印机发送控制指令
/// 3 调用SetLeft, SetBold, SetAlignMode, SetFontSize ... ...设置打印参数
/// 4 PrintText 打印内容.注意：打印该行内容后会自动换行(本类会在该行内容末尾添加一个换行符)
/// PrintImageFile 或 PrintBitMap打印图片
/// 5 控制指令和打印内容都发送完毕后,调用 EndPrint执行真正打印动作
/// 6 退出程序前调用Close
///
public class ReceiptHelper
{
#region 指令定义
private static Byte[] Const_Init = new byte[] { 0x1B, 0x40,
0x20, 0x20, 0x20, 0x0A,
0x1B, 0x64,0x10};
//设置左边距
private const string Const_SetLeft = "1D 4C ";
//设置粗体
private const string Const_SetBold = "1B 45 ";
private const String Const_Bold_YES = "01";
private const String Const_Bold_NO = "00";
//设置对齐方式
private const string Const_SetAlign = "1B 61 ";
private const String Const_Align_Left = "30";
private const String Const_Align_Middle = "31";
private const String Const_Align_Right = "32";
//设置字体大小,与 SetBigFont 不能同时使用
private const string Const_SetFontSize = "1D 21 ";
//设置是否大字体,等同于 SetFontSize = 2
//private const String Const_SetBigFontBold = "1B 21 38";
//private const String Const_SetBigFontNotBold = "1B 21 30";
//private const String Const_SetCancelBigFont = "1B 21 00";
///
/// 打印并走纸
///
private static Byte[] Const_Cmd_Print = new byte[] { 0x1B, 0x4A, 0x00 };
//走纸
private const string Const_FeedForward = "1B 4A ";
private const string Const_FeedBack = "1B 6A ";
//切纸
private static Byte[] Const_SetCut = new byte[] { 0x1D, 0x56, 0x30};
//查询打印机状态
private static Byte[] Const_QueryID = new byte[] { 0x1D, 0x67, 0x61};
//回复帧以 ID 开头
private static String Const_ResponseQueryID = "ID";
///
/// 设置图标的指令
///
private static Byte[] Const_SetImageCommand = new Byte[] { 0x1B, 0x2A, 0x21 };
#endregion
#region 常量定义
///
/// 最大字体大小
///
public const Int32 Const_MaxFontSize = 8;
///
/// 最大走纸距离
///
public const Int32 Const_MaxFeedLength = 5000;
///
/// 最大高宽
///
public const Int32 Const_MaxImageLength = 480;
///
/// 每次通信最多打印的行数
///
public const Int32 Const_OncePrintRowCount = 24;
public const Int32 Const_BrightnessGate = 100;
///
/// 无效句柄
///
public const Int32 Const_InvalidHandle = -1;
#endregion
#region 私有成员
///
/// 打印机句柄
///
private int m_Handle = -1;
///
/// 是否已经初始化
///
private Boolean m_Inited = false;
#endregion
#region 私有函数
[DllImport("winspool.Drv", EntryPoint = "OpenPrinterA", SetLastError = true, CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPStr)] string szPrinter,
out Int32 hPrinter, IntPtr pd);
[DllImport("winspool.Drv", EntryPoint = "StartDocPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool StartDocPrinter(Int32 hPrinter, Int32 level, [In, MarshalAs(UnmanagedType.LPStruct)] DOCINFOA di);
[DllImport("winspool.Drv", EntryPoint = "EndDocPrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool EndDocPrinter(Int32 hPrinter);
[DllImport("winspool.Drv", EntryPoint = "StartPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool StartPagePrinter(Int32 hPrinter);
[DllImport("winspool.Drv", EntryPoint = "EndPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool EndPagePrinter(Int32 hPrinter);
[DllImport("winspool.Drv", EntryPoint = "WritePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool WritePrinter(Int32 hPrinter, Byte[] pBytes, Int32 dwCount, out Int32 dwWritten);
[DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool ClosePrinter(Int32 hPrinter);
///
/// 发送指令
///
///
///
private Boolean SendCommand(Byte[] cmd)
{
if (m_Handle == Const_InvalidHandle || cmd == null || cmd.Length < 2)
{
return false;
}
int writelen = 0;
Boolean bl = WritePrinter(m_Handle, cmd, cmd.Length, out writelen);
if (!bl) return false;
return (writelen >= cmd.Length);
}
///
/// 发送文本格式的指令
///
///
///
private Boolean SendCommand(String hexstrcmd)
{
if (m_Handle == Const_InvalidHandle || hexstrcmd == null || hexstrcmd.Length < 4)
{
return false;
}
byte[] mybyte = null;
Boolean bl = DataFormatProcessor.HexStringToBytes(hexstrcmd, out mybyte);
bl = SendCommand(mybyte);
return bl;
}
#endregion
#region 内部处理 - 打印图片
///
/// 把图片转换为指令字节,图片最大高宽不能超过480
///
///
///
///
public static Boolean LoadImage(Bitmap image,
ref Byte[] bitarray,ref Int32 datawidth,ref Int32 dataheight)
{
Int32 newwidth = 0;
Int32 newheight = 0;
Bitmap destimage = image;
Boolean bl = false;
//如果高度超过范围,或宽度超过范围,需要进行缩小
if (image.Width > Const_MaxImageLength || image.Height > Const_MaxImageLength)
{
//按照高度和宽度，较大的那一边，进行缩放
if (image.Width > image.Height)
{
newwidth = Const_MaxImageLength;
newheight = (Int32)(image.Height * newwidth / (float)image.Width);
}
else
{
newheight = Const_MaxImageLength;
newwidth = (Int32)(newheight * image.Width / (float)image.Height);
}
bl = ImageProcessor.ResizeImage(image, newwidth, newheight, ref destimage);
}
//把数据转换为字节数组
bl = GetBitArray(image, ref bitarray, ref datawidth, ref dataheight);
return bl;
}
///
/// 把图片转换为指令字节,图片最大高宽不能超过480
/// 如果图片的高度不是24的整数倍,则修改为24的整数倍
///
///
///
///
public static Boolean LoadImageFromFile(String imagefilename, ref Byte[] bmpbytes,
ref Int32 width, ref Int32 height)
{
Bitmap img = ImageProcessor.LoadBitImage(imagefilename);
if (img == null)
{
return false;
}
Boolean bl = LoadImage(img, ref bmpbytes, ref width, ref height);
return bl;
}
///
/// 把图片转换为位图数组,每个字节的每个比特位,对应当前像素 是否需要打印
///
///
///
///
public static Boolean GetBitArray(Bitmap img,
ref Byte[] allbitary, ref Int32 width, ref Int32 height)
{
if (img == null)
{
return false;
}
//ESC指令格式规定：
//1 打印图片时，每条指令最多只打印24行;不足24行的,也要用全0填充满数据字节
//2 打印24行数据时，按照光栅模式纵向获取数据
// 即先获取所有x=0的点（第0列）转换为3个字节；
// 再获取所有x=1的点转换为3个字节；...直到获取到最右侧一列的点
//3 打印完当前24行数据后，再获取后续24行的数据内容,直到所有的数据获取完毕
//获取亮度数组
Boolean[] briary = null;
Boolean bl = ImageProcessor.ToBooleanArray(img, Const_BrightnessGate, ref briary);
if (!bl)
{
return false;
}
height = img.Height;//如果图像高度不是24整数倍,设置为24的整数倍
if (height % Const_OncePrintRowCount != 0)
{
height = height + Const_OncePrintRowCount - height % Const_OncePrintRowCount;
}
width = img.Width;//如果图像宽度不是8的整数倍,设置为8的整数倍
if (width % 8 != 0)
{
width = width + 8 - width % 8;
}
Int32 bytelen = height * width / 8;//每个像素对应1个比特位,因此总字节数=像素位数/8
allbitary = new Byte[bytelen];
Int32 byteidxInCol = 0;//当前列里首个像素,在目标字节数组里的下标
Int32 byteidx = 0;//当前像素在目标数组里的字节下标
Int32 bitidx = 0;//当前像素在目标数组里当前字节里的比特位下标
Int32 pixidxInCol = 0;//当前像素在当前列里的第几个位置
Int32 pixidx = 0;//当前像素在原始图片里的下标
Int32 rowidx = 0; //当前 处理的像素点所在行,不能超过 图像高度
Int32 curprocrows = 0;//当前需要处理的行数量
while (rowidx < height)
{
//按照纵向次序,把当前列的24个数据,转换为3个字节
for (Int32 colidx = 0; colidx < img.Width; ++colidx)
{
//如果当前还剩余超过24行没处理,处理24行
if (rowidx + Const_OncePrintRowCount <= img.Height)
{
curprocrows = Const_OncePrintRowCount;
}
else
{
//已经不足24行,只处理剩余行数
curprocrows = img.Height - rowidx;
}
pixidxInCol = 0; //本列里从像素0开始处理
for (Int32 y = rowidx; y < rowidx + curprocrows; ++y)
{
//原始图片里像素位置
pixidx = y * img.Width + colidx;
//获取当前像素的亮度值.如果当前像素是黑点,需要把数组里的对应比特位设置为1
if (briary[pixidx])
{
bitidx = 7 - pixidxInCol % 8;//最高比特位对应首个像素.最低比特位对应末个像素
byteidx = byteidxInCol + pixidxInCol / 8; //由于最后一段可能不足24行,因此不能使用byteidx++
DataFormatProcessor.SetBitValue(bitidx, true, ref allbitary[byteidx]);
}
pixidxInCol++;
}
byteidxInCol += 3;//每列固定24个像素,3个字节
}
rowidx += Const_OncePrintRowCount;
}
return true;
}
#endregion
#region 公开函数
private static ReceiptHelper m_instance = new ReceiptHelper();
///
/// 当前使用的打印机名称
///
public String PrinterName
{
get;private set;
}
///
/// 单件模式
///
///
public static ReceiptHelper GetInstance()
{
return m_instance;
}
///
/// 获取本机安装的所有打印机
///
///
public static List
{
List
if (PrinterSettings.InstalledPrinters.Count < 1)
{
return ret;
}
foreach (String printername in PrinterSettings.InstalledPrinters)
{
ret.Add(printername);
}
return ret;
}
///
/// 打开打印机
///
///
///
public Boolean Open(String printername)
{
if (m_Inited)
{
return true;
}
Boolean bl = OpenPrinter(printername.Normalize(), out m_Handle, IntPtr.Zero);
m_Inited = (bl && m_Handle != 0);
return true;
}
///
/// 开始打印，在打印之前必须调用此函数
///
///
public Boolean StartPrint()
{
if (!m_Inited)
{
return false;
}
DOCINFOA di = new DOCINFOA();
di.pDocName = "My C#.NET RAW Document";
di.pDataType = "RAW";
//Start a document.
Boolean bl = StartDocPrinter(m_Handle, 1, di);
if (!bl)
{
return false;
}
// Start a page.
bl = StartPagePrinter(m_Handle);
return bl;
}
///
/// 结束打印，在打印结束之后必须调用此函数
///
///
public Boolean EndPrint()
{
if (!m_Inited)
{
return false;
}
Boolean bl = EndPagePrinter(m_Handle);
bl = EndDocPrinter(m_Handle);
return bl;
}
///
/// 销毁
///
///
public Boolean Close()
{
if (!m_Inited)
{
return true;
}
m_Inited = false;
//关闭设备句柄
ClosePrinter(m_Handle);
m_Handle = -1;
return true;
}
///
/// 打印文本.在调用本函数之前必须先调用正确的 设置字体、左边距
///
///
///
public Boolean PrintText(String content)
{
if (!m_Inited)
{
return false;
}
byte[] bytes = null;
if (content.Length < 1)
{
content = " ";
}
if (content[content.Length - 1] != (char)0x0D &&
content[content.Length - 1] != (char)0x0A)
{
content = content + (char)0x0A;
}
bytes = DataFormatProcessor.StringToBytes(content);
bool bl = SendCommand(bytes);
return bl;
}
///
/// 设置对齐方式
///
///
///
public bool SetAlignMode(eTextAlignMode alignmode)
{
if (!m_Inited)
{
return false;
}
String code = String.Empty;
switch (alignmode)
{
case eTextAlignMode.Left:
code = Const_Align_Left;
break;
case eTextAlignMode.Middle:
code = Const_Align_Middle;
break;
case eTextAlignMode.Right:
code = Const_Align_Right;
break;
default:
code = Const_Align_Left;
break;
}
//注意：先低字节后高字节
string str = Const_SetAlign + code;
bool bl = SendCommand(str);
return bl;
}
///
/// 设置左边距
///
///
///
public bool SetLeft(int left)
{
if (!m_Inited)
{
return false;
}
//注意：先低字节后高字节
String hexstr = left.ToString("X4");
string str = Const_SetLeft + hexstr.Substring(2, 2) + hexstr.Substring(0, 2);
bool bl = SendCommand(str);
return bl;
}
///
/// 设置粗体
///
///
///
public Boolean SetBold(Boolean bold)
{
if (!m_Inited)
{
return false;
}
//注意：先低字节后高字节
String str = String.Empty;
if (bold)
{
str = Const_SetBold + Const_Bold_YES;
}
else
{
str = Const_SetBold + Const_Bold_NO;
}
bool bl = SendCommand(str);
return bl;
}
///
/// 切纸
///
///
public bool Cut()
{
if (!m_Inited)
{
return false;
}
bool bl = SendCommand(Const_SetCut);
return bl;
}
///
/// 打印图片
///
///
///
public bool PrintImageFile(String imgfilename)
{
if (!m_Inited)
{
return false;
}
Bitmap img = ImageProcessor.LoadBitImage(imgfilename);
if (img == null)
{
return false;
}
Boolean bl = PrintBitmap(img);
return bl;
}
///
/// 打印图片
///
///
///
public bool PrintBitmap(Bitmap bitmap)
{
if (!m_Inited)
{
return false;
}
if (bitmap == null ||
bitmap.Width > Const_MaxImageLength ||
bitmap.Height > Const_MaxImageLength)
{
return false;
}
Byte[] bitary = null;
Int32 width = 0;
Int32 height = 0;
Boolean bl = GetBitArray(bitmap, ref bitary, ref width, ref height);
bl = PrintBitmapBytes(bitary, bitmap.Width, bitmap.Height);
return bl;
}
///
/// 打印图片
///
///
///
public bool PrintBitmapBytes(Byte[] imgbitarray, Int32 width, Int32 height)
{
if (!m_Inited)
{
return false;
}
Int32 bytes = width * height / 8;
//检查是否尺寸符合要求
if (width > Const_MaxImageLength || height > Const_MaxFeedLength ||
width < 1 || height < 1 ||
imgbitarray == null)
{
return false;
}
//每次获取24行的数据进行发送,这24行的字节数
Int32 blockbytes = width * Const_OncePrintRowCount / 8;
if (blockbytes < 1)
{
return false;
}
Boolean bl = false;
//一共需要发送的块数量
Int32 blocks = imgbitarray.Length / blockbytes;
//每次发送的数据字节数 = 1B 2A 21 2字节长度 + 数据内容
Byte[] cmdbytes = new Byte[5 + blockbytes];
//指令
Array.Copy(Const_SetImageCommand, cmdbytes, 3);
//数据长度,即 每行的点数
DataFormatProcessor.Int16ToBytes(width, ref cmdbytes, 3);
//数据内容
for (Int32 blockidx = 0; blockidx < blocks; ++blockidx)
{
Array.Copy(imgbitarray, blockidx * blockbytes, cmdbytes, 5, blockbytes);
//发送当前指令
bl = SendCommand(cmdbytes);
if (!bl) return false;
//休眠20毫秒
Thread.Sleep(20);
//发送 打印指令
bl = SendCommand(Const_Cmd_Print);
if (!bl) return false;
}
return bl;
}
///
/// 走纸
///
///
///
public bool Feed(int length)
{
if (!m_Inited)
{
return false;
}
if (length < 1)
length = 1;
if (length > Const_MaxFeedLength)
{
length = Const_MaxFeedLength;
}
string len = length.ToString("X2");
len = Const_FeedForward + len;
bool bl = SendCommand(len);
return bl;
}
///
/// 回退走纸
///
///
///
public bool FeedBack(int length)
{
if (!m_Inited)
{
return false;
}
if (length < 1)
length = 1;
if (length > Const_MaxFeedLength)
{
length = Const_MaxFeedLength;
}
string len = length.ToString("X2");
len = Const_FeedBack + len;
bool bl = SendCommand(len);
return bl;
}
///
/// 设置字体大小.本函数不可与SetBigFont同时使用
///
/// 大小倍率,取值范围 1 - 8
///
public bool SetFontSize(Int32 sizerate)
{
if (!m_Inited)
{
return false;
}
if (sizerate < 1)
{
sizerate = 1;
}
if (sizerate > Const_MaxFontSize)
{
sizerate = Const_MaxFontSize;
}
sizerate--;
String sizecodestr = Const_SetFontSize + sizerate.ToString("X1") + sizerate.ToString("X1");
bool bl = SendCommand(sizecodestr);
return bl;
}
#endregion
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using LaisonTech.CommonBLL;
using System.Drawing.Imaging;
using System.IO;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using AForge.Imaging.Filters;
namespace LaisonTech.MediaLib
{
///
/// 图片格式
///
public enum ePictureFileFormat
{
Bmp = 0,
Gif = 1,
Icon = 2,
Jpeg = 3,
Png = 4,
}
///
/// 转为灰度图像的方式
///
public enum eGrayMode
{
///
/// 算数平均
///
ArithmeticAverage = 0,
///
/// 加权平均
///
WeightedAverage = 1,
}
///
/// 比较2个图片的指定区域范围,像素的相同类型
///
public enum eAreaDifferentType
{
///
/// 所有像素都相同
///
AllSame = 0,
///
/// 所有像素都不同
///
AllDifferent = 1,
///
/// 部分相同部分不同
///
Partial = 2,
}
///
/// 图片文件处理
///
public class ImageProcessor
{
#region 常量定义
public const Byte Const_BrightnessWhite = 255;
public const Byte Const_BrightnessBlack = 0;
///
/// 比较结果的图片里，亮度相同部分的填充颜色
///
public static Color Const_SameBrightnessColor = Color.Black;
///
/// 比较结果的图片里，亮度相同部分的填充颜色
///
public static Color Const_DifferentBrightnessColor = Color.White;
public const Byte Const_BlackBrightness = 0;
public const Byte Const_WhiteBrightness = 255;
public const Int32 Const_MaxBrightness = 255;
public const Int32 Const_MinBrightness = -255;
///
/// 亮度的中间值
///
public const Int32 Const_MiddleBrightness = 128;
#endregion
#region 屏幕截图,打印
///
/// 获取屏幕分辨率
///
///
///
public static void GetScreenSize(ref Int32 width, ref Int32 height)
{
height = Screen.PrimaryScreen.Bounds.Height;
width = Screen.PrimaryScreen.Bounds.Width;
}
///
///截图指定控件上显示的内容
///
///
///
public static Image CaptureControlImage(Control ctrl)
{
if (ctrl == null)
{
return null;
}
Control parent = ctrl;
if (ctrl.Parent != null)
{
parent = ctrl.Parent;
}
Point screenPoint = parent.PointToScreen(ctrl.Location);
Image ret = new Bitmap(ctrl.Width, ctrl.Height);
Graphics g = Graphics.FromImage(ret);
g.CopyFromScreen(screenPoint.X, screenPoint.Y,
0, 0, ctrl.Size);
g.DrawImage(ret, 0, 0);
return ret;
}
#endregion
#region 装载图片
///
/// 装载图像文件
///
///
///
public static Image LoadImage(String filename)
{
//Boolean bl = FileProcessor.FileExist(filename);
//if (!bl)
//{
// return null;
//}
//Bitmap image = (Bitmap)Bitmap.FromFile(filename);
//return image;
//以上方法会导致图片文件被锁定,无法删除移动
Byte[] photodata = null;
Boolean bl = FileProcessor.FileExist(filename);
if (!bl)
{
return null;
}
bl = FileProcessor.ReadFileBytes(filename, out photodata);
if (!bl)
{
return null;
}
MemoryStream ms = null;
Image myImage = null;
try
{
ms = new MemoryStream(photodata);
myImage = Bitmap.FromStream(ms);
ms.Close();
}
catch (System.Exception ex)
{
Console.WriteLine("LoadImage error:" + ex.Message);
myImage = null;
}
return myImage;
}
///
/// 装载图像文件
///
///
///
public static Bitmap LoadBitImage(String filename)
{
Bitmap ret = (Bitmap)LoadImage(filename);
return ret;
}
///
/// 保存图片到指定路径
///
///
///
///
public static Boolean SaveImage(Image img, String filename)
{
FileProcessor.DeleteFile(filename);
if (img == null)
{
return false;
}
//获取保存图片的路径，如果路径不存在，新建
String folder = FileProcessor.GetDirectoryName(filename);
if (!FileProcessor.DirectoryExist(folder))
{
FileProcessor.CreateDirectory(folder);
}
img.Save(filename);
Boolean bl = FileProcessor.FileExist(filename);
return bl;
}
#endregion
#region 转换图片格式
///
/// 转换图片格式
///
///
///
///
public static Boolean BmpToJpg(String bmpfilename, String jpgfilename)
{
Boolean bl = ChangeFileFormat(bmpfilename, jpgfilename, ePictureFileFormat.Jpeg);
return bl;
}
///
/// 转换图片格式
///
///
///
///
///
public static Boolean ChangeFileFormat(String srcfilename, String destfilename, ePictureFileFormat destformat)
{
Boolean bl = FileProcessor.FileExist(srcfilename);
if (!bl)
{
return false;
}
Image image = Image.FromFile(srcfilename);
ImageFormat IFMT = null;
switch (destformat)
{
case ePictureFileFormat.Bmp:
IFMT = ImageFormat.Bmp;
break;
case ePictureFileFormat.Gif:
IFMT = ImageFormat.Gif;
break;
case ePictureFileFormat.Icon:
IFMT = ImageFormat.Icon;
break;
case ePictureFileFormat.Jpeg:
IFMT = ImageFormat.Jpeg;
break;
case ePictureFileFormat.Png:
IFMT = ImageFormat.Png;
break;
default:
IFMT = ImageFormat.Jpeg;
break;
}
image.Save(destfilename, IFMT);
image.Dispose();
bl = FileProcessor.FileExist(destfilename);
if (!bl)
{
return false;
}
Int32 filelen = FileProcessor.GetFileLength(destfilename);
return (filelen > 0);
}
///
/// 变成黑白图
///
/// 原始图
/// 模式。0:加权平均 1:算数平均
///
public static Bitmap ToGray(Bitmap bitmap, eGrayMode mode = eGrayMode.ArithmeticAverage)
{
if (bitmap == null)
{
return null;
}
int width = bitmap.Width;
int height = bitmap.Height;
byte newColor = 0;
try
{
BitmapData srcData = bitmap.LockBits(new Rectangle(0, 0, width, height),
ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
unsafe
{
byte* curpix = (byte*)srcData.Scan0.ToPointer();
if (mode == eGrayMode.ArithmeticAverage)// 算数平均
{
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
newColor = (byte)((float)(curpix[0] + curpix[1] + curpix[2]) / 3.0f);
curpix[0] = newColor;
curpix[1] = newColor;
curpix[2] = newColor;
curpix += 3;
}
curpix += srcData.Stride - width * 3;
}
}
else
{
// 加权平均
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
newColor = (byte)((float)curpix[0] * 0.114f + (float)curpix[1] * 0.587f + (float)curpix[2] * 0.299f);
curpix[0] = newColor;
curpix[1] = newColor;
curpix[2] = newColor;
curpix += 3;
}
curpix += srcData.Stride - width * 3;
}
}
bitmap.UnlockBits(srcData);
}
}
catch
{
bitmap = null;
}
return bitmap;
}