//using O2S.Components.PDFRender4NET;

using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

namespace Common.system
{
    /// <summary>
    /// 
    /// Class to convert a pdf to an image using GhostScript DLL
    /// Credit for this code go to:Rangel Avulso
    /// i only fix a little bug and refactor a little
    /// http://www.hrangel.com.br/index.php/2006/12/04/converter-pdf-para-imagem-jpeg-em-c/
    /// </summary>
    /// <seealso cref="http://www.hrangel.com.br/index.php/2006/12/04/converter-pdf-para-imagem-jpeg-em-c/"/>
    public class PdfTrunImage
    {
        //public enum Definition
        //{
        //    One = 1, Two = 2, Three = 3, Four = 4, Five = 5, Six = 6, Seven = 7, Eight = 8, Nine = 9, Ten = 10
        //}

        ///// <summary>
        ///// 将PDF文档转换为图片的方法
        ///// </summary>
        ///// <param name="pdfInputPath">PDF文件路径</param>
        ///// <param name="imageOutputPath">图片输出路径</param>
        ///// <param name="imageName">生成图片的名字</param>
        ///// <param name="startPageNum">从PDF文档的第几页开始转换</param>
        ///// <param name="endPageNum">从PDF文档的第几页开始停止转换</param>
        ///// <param name="imageFormat">设置所需图片格式</param>
        ///// <param name="definition">设置图片的清晰度，数字越大越清晰</param>
        //public static List<string> ConvertPDF2Image(string pdfInputPath, string imageOutputPath,
        //    string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, Definition definition)
        //{
        //    List<string> images = new List<string>();
        //    try
        //    {
        //        PDFFile pdfFile = PDFFile.Open(pdfInputPath);

        //        if (!Directory.Exists(imageOutputPath))
        //        {
        //            Directory.CreateDirectory(imageOutputPath);
        //        }

        //        // validate pageNum
        //        if (startPageNum <= 0)
        //        {
        //            startPageNum = 1;
        //        }

        //        if (endPageNum == 0 || endPageNum > pdfFile.PageCount)
        //        {
        //            endPageNum = pdfFile.PageCount;
        //        }
        //        if (startPageNum > endPageNum)
        //        {
        //            int tempPageNum = startPageNum;
        //            startPageNum = endPageNum;
        //            endPageNum = startPageNum;
        //        }

        //        // start to convert each page
        //        for (int i = startPageNum; i <= endPageNum; i++)
        //        {
        //            Bitmap pageImage = pdfFile.GetPageImage(i - 1, 56 * (int)definition);
        //            string imgPath = imageOutputPath + imageName + i.ToString() + "." + imageFormat.ToString();
        //            pageImage.Save(imgPath, imageFormat);
        //            images.Add(imgPath);
        //            // 返回的图片绝对路径集合
        //            pageImage.Dispose();
        //        }

        //        pdfFile.Dispose();
        //        return images;
        //    }
        //    catch (System.Exception ex)
        //    {
        //        LogHelper.WriteErrLog("PDF转图片" +
        //            "【PdfTrunImage】" + ex.Message, ex);
        //        images = new List<string>();
        //        return images;
        //    }
        //}
    }
}