C#图片处理总结——叠加、缩放、鼠标拖动

1、C#图片处理总结一一叠加、缩放、鼠标拖动2011-05-0312:371265人阅读评论收藏举报c#floatimageobjectstringnull/用到的命名空间/usingSystem.Drawing;usingSystem.Drawing.Drawing2D;usingSystem.Drawing.lmaging;/两张图片叠加，floatfImage(01)透明度/privatevoidgetMixlmage(floatfImage,stringstrFrontImage,stringstrBackImage)this.m_image.Dispose();Bitmapbackgro

2、und=newBitmap(strBackImage);BitmapfrontImage=newBitmap(strFrontlmage);intiwidth=background.Width>frontImage.Width?background.Width:frontImage.Width;intiheight=background.Height>frontImage.Height?background.Height:frontImage.Height;BitmapmixImage2=newBitmap(iwidth,iheight);/this.mixImage.Width=

3、iwidth;/this.mixImage.Height=iheight;Graphicsg=Graphics.Fromlmage(mixlmage2);floatcolormatrix=newfloat1,0,0,0,0,代表了代表了G代表了newfloat0,1,0,0,0,/newfloat0,0,1,0,0,/newfloat0,0,0,flmage,0,代表了Anewfloat0,0,0,0,1;ColorMatrixcm=newColorMatrix(colormatrix);ImageAttributesimageAtt=newlmageAttributes();imageAtt

4、.SetColorMatrix(cm,ColorMatrixFIag.Default,ColorAdjustType.Bitmap);g.Drawlmage(background,newPoint(O,0);g.DrawImage(frontlmage,newRectangle(0,0,frontImage.Width,frontImage.Height),0,0,frontImage.Width,frontImage.Height,GraphicsUnit.Pixel,imageAtt);this.pictureBox1.Image=mixImage2;this.pictureBox1.Up

5、date();this.m_ChangeSize=mixImage2;/图片的缩放/publicForm1()InitializeComponent();/写在初始化时，提高运算速度/base.SetStyle(ControlStyles.OptimizedDoubleBuffer|ControlStyles.AllPaintingInWmPaint|ControlStyles.UserPaint,true);base.SetStyle(ControlStyles.ResizeRedraw|ControlStyles.Selectable,true);/放大/privatevoidbutton

6、PicSizeEnlarge_Click(objectsender,EventArgse)this.nPicSize+;if(this.nPicSize<1)this.nPicSize=1;MessageBox.Show(”无法再减弱”)；if(this.nPicSize>6)MessageBox.Show(”无法再增强”)；this.nPicSize=6;elsethis.picSizeColor();if(this.nReset=0)mmage=m_Reset;if(this.pictureBox1.lmage.Width>this.splitContainer1.Pan

7、el1.Width&&this.pictureBox1.lmage.Height>this.splitContainer1.Panel1.Height&&pictureBox1.Image.Height>=mmage.Height*4)MessageBox.Show(”已是最大");elsethis.nReset=this.nReset+1;Rectangleoldrct;Bitmapbmp=(Bitmap)this.pictureBox1.Image;oldrct=newRectangle(0,0,bmp.Width,bmp.Height

8、);this.pictureBox1.Image=bmp;Bitmaptmpbmp=null;tmpbmp=newBitmap(bmp.Width*2,bmp.Height*2);if(bmp.Width<mmage.Width)oldrct=newRectangle(0,0,m_image.Width,m_image.Height);Graphicsg=Graphics.Fromlmage(tmpbmp);Rectanglenewrct=newRectangle(0,0,tmpbmp.Width,tmpbmp.Height);g.DrawImage(m_image,newrct,old

9、rct,GraphicsUnit.Pixel);g.lnterpolationMode=System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;pictureBoxI.Image=tmpbmp;g.Dispose();pictureBox1.Update();elseGraphicsg=Graphics.Fromlmage(tmpbmp);Rectanglenewrct=newRectangle(0,0,tmpbmp.Width,tmpbmp.Height);g.DrawImage(bmp,newrct,oldrct,Grap

10、hicsUnit.Pixel);g.lnterpolationMode=System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;pictureBox1.Image=tmpbmp;g.Dispose();pictureBox1.Update();this.mmage=(Bitmap)this.pictureBox1.Image;/缩小/privatevoidbuttonPicSizeNarrow_Click(objectsender,EventArgse)this.nPicSize-;if(this.nPicSize<1)

11、this.nPicSize=1;MessageBox.Show(”无法再缩小”)；if(this.nPicSize>6)MessageBox.Show(”无法再增大”)；this.nPicSize=6;elsethis.picSizeColor();if(this.nReset=0)mmage=m_Reset;if(pictureBoxl.lmage.Width<=this.splitContainerl.Panell.Width&&pictureBoxI.Image.Height<=this.splitContainer1.Panel1.Height)Mes

12、sageBox.Show(”已经最小”)；elsethis.nReset=this.nReset-1;Rectangleoldrct;Bitmapbmp=(Bitmap)this.pictureBox1.Image;oldrct=newRectangle(0,0,bmp.Width,bmp.Height);this.pictureBox1.Image=bmp;Bitmaptmpbmp=null;tmpbmp=newBitmap(bmp.Width/2,bmp.Height/2);Graphicsg=Graphics.Fromlmage(tmpbmp);Rectanglenewrct=newRe

13、ctangle(0,0,tmpbmp.Width,tmpbmp.Height);g.Drawlmage(bmp,newrct,oldrct,GraphicsUnit.Pixel);g.lnterpolationMode=system.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;pictureBox1.Image=tmpbmp;g.Dispose();pictureBox1.Update();this.mmage=(Bitmap)this.pictureBox1.Image;/鼠标拖动图片/定义图片位置，全局变量/PointM_p

14、ot_p=newPoint();原始位置intMnt_mx=0,Mnt_my=0;/下次能继续intMnt_maxX,Mnt_maxY;加快读取用privatevoidpictureBox1_MouseDown(objectsender,MouseEventArgse)Bitmaptmpbmp=(Bitmap)this.pictureBox1.Image;M_pot_p=e.Location;Mnt_maxX=pictureBox1.Width-tmpbmp.Width;Mnt_maxY=pictureBox1.Height-tmpbmp.Height;Cursor=Cursors.SizeA

15、II;privatevoidpictureBox1_MouseMove(objectsender,MouseEventArgse)if(e.Button=MouseButtons.Left)/当按左键的时候/算差值Bitmaptmpbmp=(Bitmap)this.pictureBox1.Image;Mnt_mx=Mnt_mx-M_pot_p.X+e.X;Mnt_my=Mnt_my-M_pot_p.Y+e.Y;/锁定范围Mnt_mx=Math.Min(0,Math.Max(Mnt_maxX,M_int_mx);Mnt_my=Math.Min(0,Math.Max(Mnt_maxY,Mnt_my);Graphicsg