标签：for rect state writer 原因 box new t source ima
最近在研究Unity3D中读取PDF的内容，预想了三种方案，一是用Java来实现，二是调用C#的iTextSharp库或者PDFBox库来实现，三是下载PDF Renderer插件（土豪可以买这个插件，支持的系统也比较全面），java不是很精通，我就研究了一下C#调用iTextSharp库来实现，但是遗憾的是不支持UWP系统。再写代码之前呢，得在Assets下的Plugins文件夹中导入itextsharp.dll、Spire.Pdf.dll、Spire.License.dll、System.Drawing.dll库，才能好使。
直接上传代码：
//读取PDF文字内容
private void ReadPDF_Click()
{
string path = Application.streamingAssetsPath + "/SimplePDF.pdf";
msg.text = OnCreated(path);
}
private string OnCreated(string filepath)
{
try
{
string pdffilename = filepath;
PdfReader pdfReader = new PdfReader(pdffilename);
int numberOfPages = pdfReader.NumberOfPages;
string text = string.Empty;
for (int i = 1; i <= numberOfPages; ++i)
{
iTextSharp.text.pdf.parser.ITextExtractionStrategy strategy = new iTextSharp.text.pdf.parser.SimpleTextExtractionStrategy();
text += iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(pdfReader, i, strategy);
}
pdfReader.Close();
return text;
}
catch (Exception ex)
{
StreamWriter wlog = File.AppendText(System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase + "\\mylog.log");
wlog.WriteLine("出错文件：" + "原因：" + ex.ToString());
wlog.Flush();
wlog.Close();
return null;
}
}//读取PDF中的图片
private void ReadPDFImage()
{
string path = Application.streamingAssetsPath + "/aa.pdf";
ExtractImageEvent(path);
}
private void ExtractImageEvent(string padPath)
{
try
{
int index = 0;
PdfReader pdfReader = new PdfReader(padPath);
Debug.Log(pdfReader.NumberOfPages);
for (int pageNumber = 1; pageNumber <= pdfReader.NumberOfPages; pageNumber++)
{
PdfReader pdf = new PdfReader(padPath);
PdfDictionary pg = pdf.GetPageN(pageNumber);
PdfDictionary res = (PdfDictionary)PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES));
PdfDictionary xobj = (PdfDictionary)PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT));
try
{
foreach (PdfName name in xobj.Keys)
{
PdfObject obj = xobj.Get(name);
if (obj.IsIndirect())
{
PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj);
string width = tg.Get(PdfName.WIDTH).ToString();
string height = tg.Get(PdfName.HEIGHT).ToString();
//ImageRenderInfo imgRI = ImageRenderInfo.CreateForXObject((GraphicsState)new Matrix(float.Parse(width), float.Parse(height)), (PRIndirectReference)obj, tg);
ImageRenderInfo imgRI = ImageRenderInfo.CreateForXObject(new GraphicsState(), (PRIndirectReference)obj, tg);
RenderImageByte(imgRI,index);
}
}
}
catch
{ continue; }
}
}
catch (Exception)
{
throw;
}
}
private void RenderImageByte(ImageRenderInfo renderInfo,int index)
{
PdfImageObject imageObj = renderInfo.GetImage();
pimage = imageObj.GetDrawingImage();
MemoryStream ms = new MemoryStream();
pimage.Save(ms, ImageFormat.Png);
byte[] byteData = new Byte[ms.Length];
ms.Position = 0;
ms.Read(byteData, 0, byteData.Length);
ms.Close();
Texture2D tex2d = new Texture2D(500, 1000);
if (tex2d.LoadImage(byteData))
{
UIimage.texture = tex2d;
}
///保存到本地
//Bitmap dd = new Bitmap(pimage);
//dd.Save(Application.dataPath + "/Resources/wode.Jpeg");
}我只测试了windows下好使，其他的没有测试，希望大家能够用得着，也可以测试一下其他的系统。
标签：for rect state writer 原因 box new t source ima
原文地址：http://blog.51cto.com/myselfdream/2136560
