C图片处理总结叠加缩放鼠标拖动.docx

C#图片处理总结——叠加、缩放、鼠标拖动2011-05-03 12:37?1265人阅读?评论(2)?收藏?举报c#floatimageobjectstringnull/////////////用到的命名空间////////////using System.Drawing;using System.Drawing.Drawing2D;using System.Drawing.Imaging;?/////两张图片叠加，float fImage（0—1）透明度///////////////?private void getMixImage(float fImage, string strFrontImage, string strBackImage)??????? {??????????? this.m_image.Dispose();??????????? Bitmap background = new Bitmap(strBackImage);??????????? Bitmap frontImage = new Bitmap(strFrontImage);??????????? int iwidth = background.Width frontImage.Width ? background.Width : frontImage.Width;??????????? int iheight = background.Height frontImage.Height ? background.Height : frontImage.Height;??????????? Bitmap mixImage2 = new Bitmap(iwidth, iheight);??????????? //this.mixImage.Width = iwidth;??????????? //this.mixImage.Height = iheight;??????????? Graphics g = Graphics.FromImage(mixImage2);??????????? float[][] colormatrix ={??????????????????????????????????????? new float[]{1,0,0,0,0},//代表了R??????????????????????????????????????? new float[]{0,1,0,0,0},//代表了G??????????????????????????????????????? new float[]{0,0,1,0,0},//代表了B??????????????????????????????????????? new float[]{0,0,0,fImage,0},//代表了A??????????????????????????????????????? new float[]{0,0,0,0,1}??????????? };??????????? ColorMatrix cm = new ColorMatrix(colormatrix);??????????? ImageAttributes imageAtt = new ImageAttributes();??????????? imageAtt.SetColorMatrix(cm, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);??????????? g.DrawImage(background, new Point(0, 0));??????????? g.DrawImage(frontImage, new Rectangle(0, 0, frontImage.Width, frontImage.Height), 0, 0, frontImage.Width, frontImage.Height, GraphicsUnit.Pixel, imageAtt);??????????? this.pictureBox1.Image = mixImage2;??????????? this.pictureBox1.Update();??????????? this.m_ChangeSize = mixImage2;??????? }??//////////////图片的缩放/////////////public Form1()??????? {??????????? InitializeComponent();????????????/////////////写在初始化时，提高运算速度////////////??????????? b