using System; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Drawing2D;namespace Tutorial { class WaterMark { [STAThread] static void Main(string[] args) { //set a working directory string WorkingDirectory = @"C:\Documents and Settings\administrator.JAZZMINE\My Documents\Projects\Tutorials\WaterMark"; //define a string of text to use as the Copyright message string Copyright = "Copyright ?2002 - AP Photo/David Zalubowski"; //create a image object containing the photograph to water Image imgPhoto = Image.FromFile(WorkingDirectory + "\\water_photo.jpg"); 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); bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); //load the Bitmap into a Graphics object Graphics grPhoto = Graphics.FromImage(bmPhoto); //create a image object containing the water Image imgWater = new Bitmap(WorkingDirectory + "\\water.bmp"); int wmWidth = imgWater.Width; int wmHeight = imgWater.Height; //------------------------------------------------------------ //Step #1 - Insert Copyright message //------------------------------------------------------------ //Set the rendering quality for this Graphics object grPhoto.SmoothingMode = SmoothingMode.AntiAlias; //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 //------------------------------------------------------- //to maximize the size of the Copyright message we will //test multiple Font sizes to determine the largest posible //font we can use for the width of the Photograph //define an array of point sizes you would like to consider as possiblities //------------------------------------------------------- int[] sizes = new int[]{16,14,12,10,8,6,4}; Font crFont = null; SizeF crSize = new SizeF(); //Loop through the defined sizes checking the length of the Copyright string //If its length in pixles is less then the image width choose this Font size. for (int i=0 ;i<7; i++) { //set a Font object to Arial (i)pt, Bold crFont = new Font("arial", sizes[i], FontStyle.Bold); //Measure the Copyright string in this Font crSize = grPhoto.MeasureString(Copyright, crFont); if((ushort)crSize.Width < (ushort)phWidth) break; } //Since all photographs will have varying heights, determine a //position 5% from the bottom of the image int yPixlesFromBottom = (int)(phHeight *.05); //Now that we have a point size use the Copyrights string height //to determine a y-coordinate to draw the string of the photograph float yPosFromBottom = ((phHeight - yPixlesFromBottom)-(crSize.Height/2)); //Determine its x-coordinate by calculating the center of the width of the image float xCenterOfImg = (phWidth/2); //Define the text layout by setting the text alignment to centered StringFormat StrFormat = new StringFormat(); StrFormat.Alignment = StringAlignment.Center; //define a Brush which is semi trasparent black (Alpha set to 153) SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0)); //Draw the Copyright string grPhoto.DrawString(Copyright, //string of text crFont, //font semiTransBrush2, //Brush new PointF(xCenterOfImg+1,yPosFromBottom+1), //Position StrFormat); //define a Brush which is semi trasparent white (Alpha set to 153) SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255)); //Draw the Copyright string a second time to create a shadow effect //Make sure to move this text 1 pixel to the right and down 1 pixel grPhoto.DrawString(Copyright, //string of text crFont, //font semiTransBrush, //Brush new PointF(xCenterOfImg,yPosFromBottom), //Position StrFormat); //Text alignment //------------------------------------------------------------ //Step #2 - Insert Water image //------------------------------------------------------------ //Create a Bitmap based on the previously modified photograph Bitmap Bitmap bmWater = new Bitmap(bmPhoto); bmWater.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); //Load this Bitmap into a new Graphic Object Graphics grWater = Graphics.FromImage(bmWater); //To achieve a transulcent water we will apply (2) color //manipulations by defineing a ImageAttributes object and //seting (2) of its properties. ImageAttributes imageAttributes = new ImageAttributes(); //The first step in manipulating the water image is to replace //the background color with one that is trasparent (Alpha=0, R=0, G=0, B=0) //to do this we will use a Colormap and use this to define a RemapTable ColorMap colorMap = new ColorMap(); //My water was defined with a background of 100% Green this will //be the color we search for and replace with transparency colorMap.OldColor = Color.FromArgb(255, 0, 255, 0); colorMap.NewColor = Color.FromArgb(0, 0, 0, 0); ColorMap[] remapTable = {colorMap}; imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap); //The second color manipulation is used to change the opacity of the //water. This is done by applying a 5x5 matrix that contains the //coordinates for the RGBA space. By setting the 3rd row and 3rd column //to 0.3f we achive a level of opacity float[][] colorMatrixElements = { new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f}, new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f}, new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f}, new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f}, new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}}; ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements); imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); //For this example we will place the water in the upper right //hand corner of the photograph. offset down 10 pixels and to the //left 10 pixles int xPosOfWm = ((phWidth - wmWidth)-10); int yPosOfWm = 10; grWater.DrawImage(imgWater, 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, // Water Width wmHeight, // Water Height GraphicsUnit.Pixel, // Unit of measurment imageAttributes); //ImageAttributes Object //Replace the original photgraphs bitmap with the new Bitmap imgPhoto = bmWater; grPhoto.Dispose(); grWater.Dispose(); //save new image to file system. imgPhoto.Save(WorkingDirectory + "\\water_final.jpg", ImageFormat.Jpeg); imgPhoto.Dispose(); imgWater.Dispose(); } } }
{
using (Bitmap BP = new Bitmap(SourceBP)) {
using (Graphics G = Graphics.FromImage(BP)) {
G.DrawImage(WaterMsk, new Rectangle(Pt.X, Pt.Y, WaterMsk.Width / 100 * Scal, WaterMsk.Height / 100 * Scal), new Rectangle(0, 0, WaterMsk.Width, WaterMsk.Height), GraphicsUnit.Pixel);
return BP;
}
}
}
// 参数:
//WaterMsk=用来合成的水印图
//SourceBP=要被合成处理的原图
//Pt=水印图左上角坐标点
//Scal=水印图的缩放百分比
Bitmap
这里有很多类和方法
具体怎么做自己研究了
如果是动态的,就用GDI画
//WaterMsk=用来合成的水印图
//SourceBP=要被合成处理的原图
这两个参数不太明白,可否解释一下?谢谢了~
要把印章合成到风景上
WaterMsk就是印章图
SourceBP就是风景图
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;namespace Tutorial
{
class WaterMark
{ [STAThread]
static void Main(string[] args)
{
//set a working directory
string WorkingDirectory = @"C:\Documents and Settings\administrator.JAZZMINE\My Documents\Projects\Tutorials\WaterMark"; //define a string of text to use as the Copyright message
string Copyright = "Copyright ?2002 - AP Photo/David Zalubowski"; //create a image object containing the photograph to water
Image imgPhoto = Image.FromFile(WorkingDirectory + "\\water_photo.jpg");
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); bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); //load the Bitmap into a Graphics object
Graphics grPhoto = Graphics.FromImage(bmPhoto); //create a image object containing the water
Image imgWater = new Bitmap(WorkingDirectory + "\\water.bmp");
int wmWidth = imgWater.Width;
int wmHeight = imgWater.Height; //------------------------------------------------------------
//Step #1 - Insert Copyright message
//------------------------------------------------------------ //Set the rendering quality for this Graphics object
grPhoto.SmoothingMode = SmoothingMode.AntiAlias; //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 //-------------------------------------------------------
//to maximize the size of the Copyright message we will
//test multiple Font sizes to determine the largest posible
//font we can use for the width of the Photograph
//define an array of point sizes you would like to consider as possiblities
//-------------------------------------------------------
int[] sizes = new int[]{16,14,12,10,8,6,4}; Font crFont = null;
SizeF crSize = new SizeF(); //Loop through the defined sizes checking the length of the Copyright string
//If its length in pixles is less then the image width choose this Font size.
for (int i=0 ;i<7; i++)
{
//set a Font object to Arial (i)pt, Bold
crFont = new Font("arial", sizes[i], FontStyle.Bold);
//Measure the Copyright string in this Font
crSize = grPhoto.MeasureString(Copyright, crFont); if((ushort)crSize.Width < (ushort)phWidth)
break;
} //Since all photographs will have varying heights, determine a
//position 5% from the bottom of the image
int yPixlesFromBottom = (int)(phHeight *.05); //Now that we have a point size use the Copyrights string height
//to determine a y-coordinate to draw the string of the photograph
float yPosFromBottom = ((phHeight - yPixlesFromBottom)-(crSize.Height/2)); //Determine its x-coordinate by calculating the center of the width of the image
float xCenterOfImg = (phWidth/2); //Define the text layout by setting the text alignment to centered
StringFormat StrFormat = new StringFormat();
StrFormat.Alignment = StringAlignment.Center; //define a Brush which is semi trasparent black (Alpha set to 153)
SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0)); //Draw the Copyright string
grPhoto.DrawString(Copyright, //string of text
crFont, //font
semiTransBrush2, //Brush
new PointF(xCenterOfImg+1,yPosFromBottom+1), //Position
StrFormat); //define a Brush which is semi trasparent white (Alpha set to 153)
SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255)); //Draw the Copyright string a second time to create a shadow effect
//Make sure to move this text 1 pixel to the right and down 1 pixel
grPhoto.DrawString(Copyright, //string of text
crFont, //font
semiTransBrush, //Brush
new PointF(xCenterOfImg,yPosFromBottom), //Position
StrFormat); //Text alignment //------------------------------------------------------------
//Step #2 - Insert Water image
//------------------------------------------------------------ //Create a Bitmap based on the previously modified photograph Bitmap
Bitmap bmWater = new Bitmap(bmPhoto);
bmWater.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
//Load this Bitmap into a new Graphic Object
Graphics grWater = Graphics.FromImage(bmWater); //To achieve a transulcent water we will apply (2) color
//manipulations by defineing a ImageAttributes object and
//seting (2) of its properties.
ImageAttributes imageAttributes = new ImageAttributes(); //The first step in manipulating the water image is to replace
//the background color with one that is trasparent (Alpha=0, R=0, G=0, B=0)
//to do this we will use a Colormap and use this to define a RemapTable
ColorMap colorMap = new ColorMap(); //My water was defined with a background of 100% Green this will
//be the color we search for and replace with transparency
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0); ColorMap[] remapTable = {colorMap}; imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap); //The second color manipulation is used to change the opacity of the
//water. This is done by applying a 5x5 matrix that contains the
//coordinates for the RGBA space. By setting the 3rd row and 3rd column
//to 0.3f we achive a level of opacity
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}};
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements); imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default,
ColorAdjustType.Bitmap); //For this example we will place the water in the upper right
//hand corner of the photograph. offset down 10 pixels and to the
//left 10 pixles int xPosOfWm = ((phWidth - wmWidth)-10);
int yPosOfWm = 10; grWater.DrawImage(imgWater,
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, // Water Width
wmHeight, // Water Height
GraphicsUnit.Pixel, // Unit of measurment
imageAttributes); //ImageAttributes Object //Replace the original photgraphs bitmap with the new Bitmap
imgPhoto = bmWater;
grPhoto.Dispose();
grWater.Dispose(); //save new image to file system.
imgPhoto.Save(WorkingDirectory + "\\water_final.jpg", ImageFormat.Jpeg);
imgPhoto.Dispose();
imgWater.Dispose(); }
}
}
用GDI+
不会看看msdn
有例子呢