C# 多个图片叠加,图片透明.

下载该示例代码



文章出处：http://www.cnblogs.com/kaixin110/archive/2007/08/04/841827.html




using System;


using System.Collections.Generic;


using System.Text;


using System.Collections;




using System.Drawing;


using System.Drawing.Imaging;


using System.Drawing.Drawing2D;




namespace Haix.Utils






{


class GenerateImage






{


public struct favoriteImage






{


private string _imagePath;


private int _x;


private int _y;





public int x






{


get






{


return _x;


}


set






{


_x = value;


}


}




public int y






{


get






{


return _y;


}


set






{


_y = value;


}


}




public string imagePath






{


get






{


return _imagePath;


}


set






{


_imagePath = value;


}


}


}




[STAThread]


static void Main(string[] args)






{


string CurrentDirectory = System.Environment.CurrentDirectory;


string body_path=CurrentDirectory + "//white.png";




favoriteImage[] FaImage = new favoriteImage[2];





FaImage[0].x = -3;


FaImage[0].y = 70;


FaImage[0].imagePath = CurrentDirectory + "//1.png";




FaImage[1].x = 20;//65;


FaImage[1].y = -12;


FaImage[1].imagePath = CurrentDirectory + "//2.png";




generateWinterMark(CurrentDirectory,body_path, FaImage);


}






/**//// <summary>


/// 生成水印


/// </summary>


/// <param name="Main">主图片路径,eg:body</param>


/// <param name="Child">要叠加的图片路径</param>


/// <param name="x">要叠加的图片位置的X坐标</param>


/// <param name="y">要叠加的图片位置的Y坐标</param>


/// <param name="isSave"></param>


/// <returns>生成图片的路径</returns>


private static string generateWinterMark(string savePath,string body_path,favoriteImage[] favorite)






{


//create a image object containing the photograph to watermark


Image imgPhoto = Image.FromFile(body_path);


int phWidth = imgPhoto.Width;


int phHeight = imgPhoto.Height;




//create a Bitmap the Size of the original photograph


Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);




//设置此 Bitmap 的分辨率。


bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);




//load the Bitmap into a Graphics object


Graphics grPhoto = Graphics.FromImage(bmPhoto);


//Set the rendering quality for this Graphics object


grPhoto.SmoothingMode = SmoothingMode.AntiAlias;//清除锯齿的呈现


//haix


for (int i = 0; i < favorite.Length; i++)






{


//Draws the photo Image object at original size to the graphics object.


grPhoto.DrawImage(


imgPhoto, // Photo Image object


new Rectangle(0, 0, phWidth, phHeight), // Rectangle structure


0, // x-coordinate of the portion of the source image to draw.


0, // y-coordinate of the portion of the source image to draw.


phWidth, // Width of the portion of the source image to draw.


phHeight, // Height of the portion of the source image to draw.


GraphicsUnit.Pixel); // Units of measure







//------------------------------------------------------------


//Step #2 - Insert Property image,For example:hair,skirt,shoes etc.


//------------------------------------------------------------


//create a image object containing the watermark


Image imgWatermark = new Bitmap(favorite[i].imagePath);


int wmWidth = imgWatermark.Width;


int wmHeight = imgWatermark.Height;







//Create a Bitmap based on the previously modified photograph Bitmap


Bitmap bmWatermark = new Bitmap(bmPhoto);


bmWatermark.MakeTransparent(); //使默认的透明颜色对此 Bitmap 透明。




//bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);


//Load this Bitmap into a new Graphic Object


Graphics grWatermark = Graphics.FromImage(bmWatermark);






int xPosOfWm = favorite[i].x;


int yPosOfWm = favorite[i].y;




//叠加


grWatermark.DrawImage(imgWatermark,new Rectangle(xPosOfWm, yPosOfWm, wmWidth, wmHeight), //Set the detination Position


0, // x-coordinate of the portion of the source image to draw.


0, // y-coordinate of the portion of the source image to draw.


wmWidth, // Watermark Width


wmHeight, // Watermark Height


GraphicsUnit.Pixel, // Unit of measurment


null); //ImageAttributes Object






//Replace the original photgraphs bitmap with the new Bitmap


imgPhoto = bmWatermark;




//grWatermark.Dispose();


//imgWatermark.Dispose();


//grPhoto.Dispose();


//bmWatermark.Dispose();


}


//haix




string nowTime = DateTime.Now.Year.ToString()+DateTime.Now.Month.ToString()+DateTime.Now.Day.ToString();


nowTime += DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString();




string saveImagePath = savePath + "//FA" + nowTime + ".png";





//save new image to file system.


imgPhoto.Save(saveImagePath, ImageFormat.Png);


imgPhoto.Dispose();







return saveImagePath;


}


}


}



叠加后的图片:

一个body,一个hair,一个西服: