绘制合成图(进行中...)

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Drawing;
using System.Drawing.Drawing2D;

namespace DrawGraphic
{
    public class DrawProduct 
    {
        /**//// <summary>
        /// construct(s) function
        /// </summary>
        public DrawProduct()
        { 
        }

        /**//// <summary>
        /// 绘制产品图
        /// </summary>
        /// <param name="product_type">合成底图地址</param>
        /// <param name="product_src">合成图片地址</param>
        /// <param name="txt_context">合成文字内容</param>
        /// <param name="txt_top">合成文字top坐标</param>
        /// <param name="txt_left">合成文字left坐标</param>
        /// <param name="prod_top">合成图片top坐标</param>
        /// <param name="prod_left">合成图片left坐标</param>
        /// <param name="prod_width">合成图片Width</param>
        /// <param name="prod_height">合成图片Height</param>
        /// <param name="txt_size">合成文字Font-Size</param>
        /// <param name="resulturl">保存路径</param>
        /// <param name="model">绘制何种产品,T-shirt(TS),cup(CUP),mouse-mat(MM),picture mosaic(PM)</param>
        /// <returns>返回,绘制成功产品图地址</returns>
        public static void drawProduct(string product_type, string product_src, string txt_context, int txt_top, int txt_left,
            int prod_top, int prod_left, int prod_width, int prod_height, int txt_size, string model, string resulturl)
        {
            //System.Web.HttpServerUtility
            //System.Web.HttpContext.Current.Server.MapPath();
            Image typeImage = null;     //底图
            Image srcImage = null;
            int W = 0;
 
            switch (model)
            {
                case "TS":
                    {
                        if (product_src.Length > 0)
                        {
                            string a1 = System.Web.HttpContext.Current.Server.MapPath(product_src);
                            srcImage = Image.FromFile(System.Web.HttpContext.Current.Server.MapPath(product_src));    //合成图
                            //指定高,宽按比例
                            W = srcImage.Width * 128 / srcImage.Height;
                        }
                        string a2 = System.Web.HttpContext.Current.Server.MapPath(product_type);
                        typeImage = Image.FromFile(System.Web.HttpContext.Current.Server.MapPath(product_type));
                        Graphics g = Graphics.FromImage(typeImage);
                        g.SmoothingMode = SmoothingMode.AntiAlias;
                        //底图大小400x400, 合成图坐标起点128x160,合成图大小160x128; 高128
                        if (product_src.Length > 0)
                        {
                            g.DrawImage(srcImage, 128 + prod_left, 160 + prod_top, W, 128);
                        }
                        if (txt_context.Length > 0)
                        {
                            //Brushes; SolidBrush s = new SolidBrush(Color)
                            g.DrawString(txt_context, new Font("宋体", (float)txt_size, FontStyle.Regular), SystemBrushes.WindowText, new Point(128 + txt_left, 160 + txt_top));
                        }
                        typeImage.Save(resulturl, System.Drawing.Imaging.ImageFormat.Jpeg);
                        g.Dispose();
                        srcImage.Dispose();
                        typeImage.Dispose();
                        break;
                    }
                case "CUP":
                    {
                        //图片切,绘制三个面

                        break;
                    }
                case "MM":
                    {
                        
                        break;
                    }
                case "PM":
                    {

                        break;
                    }
                default :
                    {
                        break;
                    }
            }
        }
    }
}