日期:2014-05-17 浏览次数:21015 次
Graphics g = this.pictureBox1.CreateGraphics();
Bitmap bitmap = new Bitmap(@"D:\My Documents\My Pictures\20100713133939131.jpg");
float[][] matrixItems = {
new float[]{1,0,0,0,0},
new float[]{0,1,0,0,0},
new float[]{0,0,1,0,0},
new float[]{0,0,0,0.8f,0},
new float[]{0,0,0,0,1},
};
ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
ImageAttributes imageAtt = new ImageAttributes();
imageAtt.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int iWidth = bitmap.Width;
int iHeight = bitmap.Height;
g.DrawLine(new Pen(Color.Black, 25), new Point(10, 35), new Point(200, 35));
//图片是半透明的
g.DrawImage(bitmap, new Rectangle(30, 0, iWidth, iHeight), 0, 0, iWidth, iHeight, GraphicsUnit.Pixel, imageAtt);
g.DrawString();
g.Flush();
g.Dispose();