原图旋转/缩放 然后画布画图 ImageProcessor

时间：2023-03-08 17:51:33
            //旋转

            byte[] photoBytes = File.ReadAllBytes(HttpContext.Current.Server.MapPath(diyInfo.ImageUrl));

            ImageFactory imageFactory = new ImageFactory();

            imageFactory.Load(photoBytes);

            imageFactory.Rotate(diyInfo.RotationAngle);

            var ss = imageFactory.Image;

            //缩放

            Bitmap bm1 = new Bitmap(ss, Convert.ToInt32(ss.Width * diyInfo.TemplateZoom * diyInfo.PictureZoom), Convert.ToInt32(ss.Height * diyInfo.TemplateZoom * diyInfo.PictureZoom));

            //画布做图

            Bitmap huabu = new Bitmap(Convert.ToInt32(diyInfo.EditWidth), Convert.ToInt32(diyInfo.EditHeight));

            Graphics huabug = Graphics.FromImage(huabu);

            var neww = bm1.Width;

            var newh = bm1.Height;

            var x = Convert.ToInt32(diyInfo.CenterMarginLeft * diyInfo.TemplateZoom - neww / );

            var y = Convert.ToInt32(diyInfo.CenterMarginTop * diyInfo.TemplateZoom - newh / );

            Point ulCorner = new Point(x, y);

            huabug.DrawImage(bm1, ulCorner);

            huabu.Save(@"newbm.jpg");
  //创建一块指定大小的画布

            var bitmap = new Bitmap(, );

            var huabug = Graphics.FromImage(bitmap);

            //在画布指定位置添加一张图片

            var ulCorner = new Point(, );

            var newImage = Image.FromFile(@"C:\\Users\\wei.chen\\Desktop\\ConsoleApplication1\\ConsoleApplication1\\images\\chrome.png");

            huabug.DrawImage(newImage, ulCorner);

            //在画布指定位置写文字

            //定义字体

            var frm = new PrivateFontCollection();

            frm.AddFontFile(@"C:\\Users\\wei.chen\\Desktop\\ConsoleApplication1\\ConsoleApplication1\\fonts\\华康娃娃体.TTF");

            Font font = new Font(frm.Families[], );

            //定义颜色

            SolidBrush sbrush = new SolidBrush(System.Drawing.ColorTranslator.FromHtml("#ff0000"));

            // 绘制围绕点旋转的文本

            PointF point = new PointF(, );

            StringFormat format = new StringFormat();

            format.Alignment = StringAlignment.Center;

            format.LineAlignment = StringAlignment.Center;

            Matrix mtxRotate = huabug.Transform;

            mtxRotate.RotateAt(90f, point); // 旋转角度和平移

            huabug.Transform = mtxRotate;

            huabug.DrawString("从前有座山", font, sbrush, point, format);

            bitmap.Save(@"newbm.jpg");