C# 基于WINFORM的，图片剪裁

Question

本帖最后由 u012847695 于 2015-01-23 11:36:25 编辑

Answer 1

自己动脑，丰衣足食啊。
public static Bitmap getImg(Bitmap b, int destwidth, int destheight)
        {
            Image imgsource = b;
           
            Bitmap outbmp = new Bitmap(destwidth, destheight);
            Graphics g = Graphics.FromImage(outbmp);
            g.Clear(Color.Transparent);
            // 设置画布的描绘质量         
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            g.DrawImage(imgsource, new Rectangle(0, 0, destwidth, destheight), 0, 0, imgsource.Width, imgsource.Height, GraphicsUnit.Pixel);
            g.Dispose();
            // 以下代码为保存图片时，设置压缩质量     
            System.Drawing.Imaging.EncoderParameters encoderparams = new System.Drawing.Imaging.EncoderParameters();
            long[] quality = new long[1];
            quality[0] = 100;
            System.Drawing.Imaging.EncoderParameter encoderparam = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
            encoderparams.Param[0] = encoderparam;
            imgsource.Dispose();
            return outbmp;

}