private string ProcessPage(PDFFile pdf, string destDir, string guid, int pageIndex, int pageCount, int imgQuality)
{
string imgPaths = destDir + guid;//Guid.NewGuid().ToString();
if (!Directory.Exists(imgPaths))
{
Directory.CreateDirectory(imgPaths);
}
if (imgQuality == 0)
{
imgQuality = 100;
}
Bitmap oriBmp = pdf.GetPageImage(pageIndex, 96);
Bitmap bmp = ImageUtility.CutAsBmp(oriBmp, CutBorderWidth, CutTopHeight, oriBmp.Width - 2 * CutBorderWidth, oriBmp.Height - CutTopHeight - CutBottomHeight);
string result = string.Format(@"{0}\{1}.jpg", imgPaths, pageIndex);
if (bmp.Width >= 700)
{
_imageHeight = (int)bmp.Height; // / 2;
_imageWidth = (int)bmp.Width; // / 2;
ImageUtility.ThumbAsJPG(bmp, result, _imageWidth, _imageHeight, imgQuality);
//tempImg = bmp.GetThumbnailImage((int)bmp.Width / 2, (int)bmp.Height / 2, new Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);
//tempImg.Save(string.Format(@"{0}\{1}-ori.jpg", imgPaths, i), System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
_imageHeight = bmp.Height;
_imageWidth = bmp.Width;
ImageUtility.CompressAsJPG(bmp, result, imgQuality);
}
return(result);
//bmp.Save(string.Format(@"{0}\{1}.jpg",imgPaths,i), System.Drawing.Imaging.ImageFormat.Jpeg);
}
/// <summary>
/// 转换PDF文件
/// </summary>
/// <param name="srcPath"></param>
/// <param name="destDir"></param>
/// <param name="fileGUID"></param>
/// <param name="pageIndex">转换的页码,-1表示转换所有页</param>
/// <param name="imgQuality"></param>
/// <param name="combineImages"></param>
/// <returns></returns>
public string Convert(string srcPath, string destDir, string fileGUID, Boolean combineImages, int pageIndex = -1, int imgQuality = 0)
{
string imgPaths = destDir + fileGUID;//Guid.NewGuid().ToString();
string result = string.Empty;
if (pageIndex < 0)
{
if (combineImages)
{
result = string.Format(@"{0}\{1}.jpg", imgPaths, fileGUID);
}
else
{
result = string.Format(@"{0}\0.jpg", imgPaths);
}
}
else
{
result = string.Format(@"{0}\{1}.jpg", imgPaths, pageIndex);
}
//如果已经存在，则直接返回
if (File.Exists(result))
{
return(result);
}
if (!Directory.Exists(imgPaths))
{
Directory.CreateDirectory(imgPaths);
}
PDFFile pdf = PDFFile.Open(srcPath);
try
{
int pageCount = pdf.PageCount;
//根据页索取
if (pageIndex >= 0 && pageIndex < pageCount)
{
return(ProcessPage(pdf, destDir, fileGUID, pageIndex, pageCount, imgQuality));
}
//获取所有页
else if (pageIndex == -1)
{
string[] ImgPaths = new string[pdf.PageCount];
//全部取的情况
for (int i = 0; i < pdf.PageCount; i++)
{
ImgPaths[i] = ProcessPage(pdf, destDir, fileGUID, i, pageCount, imgQuality);
}
//拼接图片
if (combineImages)
{
int imgCount = ImgPaths.Count();
if (imgCount > 0)
{
Bitmap resultImg = new Bitmap(_imageWidth, _imageHeight * imgCount);
Graphics resultGraphics = Graphics.FromImage(resultImg);
Image tempImage;
for (int i = 0; i < ImgPaths.Length; i++)
{
tempImage = Image.FromFile(ImgPaths[i]);
if (i == 0)
{
resultGraphics.DrawImage(tempImage, 0, 0);
}
else
{
resultGraphics.DrawImage(tempImage, 0, _imageHeight * i);
}
tempImage.Dispose();
}
ImageUtility.CompressAsJPG(resultImg, result, imgQuality);
resultGraphics.Dispose();
}
}
return(result);
}
return("");
}
finally
{
pdf.Dispose();
}
}
private string ProcessPage(Document doc, string destDir, string fileGUID, int pageCount, int imgQuality, Boolean combineImages)
{
string imgPaths = destDir + fileGUID;//Guid.NewGuid().ToString();
if (!Directory.Exists(imgPaths))
{
Directory.CreateDirectory(imgPaths);
}
if (imgQuality == 0)
{
imgQuality = 100;
}
var result = "";
ImageOptions imageOptions = new ImageOptions();
imageOptions.JpegQuality = 100;
var tifImagePath = string.Format(@"{0}\{1}.tif", imgPaths, fileGUID);
doc.SaveToImage(0, doc.PageCount, tifImagePath, imageOptions);
Utils.Tif2Jpeg(tifImagePath, imgQuality, false);
//拼接图片
if (combineImages)
{
int imgCount = pageCount;
if (imgCount > 0)
{
Bitmap resultImg = null;
Graphics resultGraphics = null;
Image tempImage;
for (int i = 0; i < imgCount; i++)
{
var imgFile = imgPaths + "\\" + i + ".jpg";
if (File.Exists(imgFile))
{
tempImage = Image.FromFile(imgFile);
if (resultImg == null)
{
_imageHeight = tempImage.Height;
resultImg = new Bitmap(tempImage.Width, tempImage.Height * imgCount);
resultGraphics = Graphics.FromImage(resultImg);
}
if (i == 0)
{
resultGraphics.DrawImage(tempImage, 0, 0);
}
else
{
resultGraphics.DrawImage(tempImage, 0, _imageHeight * i);
}
tempImage.Dispose();
}
}
result = string.Format(@"{0}\{1}.jpg", imgPaths, fileGUID);
ImageUtility.CompressAsJPG(resultImg, result, imgQuality);
resultGraphics.Dispose();
}
}
else
{
result = string.Format(@"{0}\{1}.jpg", imgPaths, 0);
}
return(result);
}
/// <summary>
/// Tif转换至Jpg
/// </summary>
/// <param name="tifFilePath">tif文件路径</param>
/// <param name="imgQuality"></param>
/// <param name="combineImages">合并图片标识</param>
/// <returns>Jpeg文件路径</returns>
public static string Tif2Jpeg(string tifFilePath, int imgQuality, Boolean combineImages)
{
try
{
int len = tifFilePath.LastIndexOf(".tif");
string fileName2 = tifFilePath.Substring(0, len);
string filePath = fileName2.Substring(0, fileName2.LastIndexOf('\\') + 1);
FileStream stream = File.OpenRead(tifFilePath);
Bitmap bmp = new Bitmap(stream);
System.Drawing.Image image = bmp;
Guid objGuid = image.FrameDimensionsList[0];
FrameDimension objDimension = new FrameDimension(objGuid);
int totFrame = image.GetFrameCount(objDimension);
int count = totFrame;
if (count <= 0)
{
bmp.Dispose();
return("");
}
Bitmap resultImg = null;
Graphics resultGraphics = null;
int imageHeight;
for (int i = 0; i < totFrame; i++)//循环生成多张图片
{
image.SelectActiveFrame(objDimension, i);
//合并图片
if (combineImages)
{
if (resultImg == null)
{
imageHeight = image.Height;
//resultImg = new Bitmap(tempImage.Width, tempImage.Height * imgCount);
resultImg = new Bitmap(792, 1120 * totFrame);
resultGraphics = Graphics.FromImage(resultImg);
}
if (i == 0)
{
resultGraphics.DrawImage(image, 0, 0);
}
else
{
resultGraphics.DrawImage(image, 0, 1120 * i);
//resultGraphics.DrawImage(tempImage, 0, imageHeight * i);
}
}
//保存图片
ImageUtility.CompressAsJPG(new Bitmap(image), filePath + "\\" + i + ".jpg", imgQuality);
//image.Save(filePath + "\\" + i + ".jpg", ImageFormat.Jpeg);
}
string imgFilePath = string.Empty;
if (combineImages)
{
imgFilePath = tifFilePath.Replace(".tif", ".jpg");
//ImageUtility.ThumbAsJPG(resultImg, result, (int)(resultImg.Width * 0.4), (int)(resultImg.Height * 0.4), quality);
ImageUtility.CompressAsJPG(resultImg, imgFilePath, imgQuality);
resultGraphics.Dispose();
}
else
{
imgFilePath = filePath + "\\0.jpg";
}
bmp.Dispose();
image.Dispose();
stream.Close();
//File.Delete(tifFilePath);
return(imgFilePath);
}
catch (Exception e)
{
return(e.Message);
}
}