pdf-rendering | 易学教程

PdfRendering zoom on page

阅读更多关于 PdfRendering zoom on page

问题 I'm working on a project where I need to display PDF content inside our application. I'm trying to use PdfRenderer of Android API. For now, I'm able to show a pdf page as bitmap and move between all other pages. But I don't understand how to implement zoom on a page. I mean I know how to zoom an image, but for pdf it needs to be recalculated at every zoom level (such as tile ?). On zoom I need to recalculate Bitmap with correct Rect and Matrix I guess, that's the point I'm missing. Does some

Android v23 PDFreader keep crashing

阅读更多关于 Android v23 PDFreader keep crashing

问题 I am new here however wondering if someone could point me in the right direction. This is part of my app in which I want to read PDF file from assets and display in the fragment. Android version used 23.4.0 public class PDFFragment extends Fragment { private ParcelFileDescriptor fileDescriptor; private PdfRenderer pdfRenderer; private PdfRenderer.Page currentPage; private ImageView image; private Button buttonPrevious; private Button buttonNext; public PDFFragment() { // Required empty public

CGContextDrawPDFPage memory Leak - App Crash

阅读更多关于 CGContextDrawPDFPage memory Leak - App Crash

问题 When I analyze my app with Instruments, I found out that data allocated by CGContextDrawPDFPage is not released immediately. App getting crash because of CGContextDrawPDFPage . Hello here is my code for drawing pdf in CATiledlayer - (void)drawLayer:(CATiledLayer *)layer inContext:(CGContextRef)context { if (_PDFPageRef == nil) { return; } CGPDFPageRef drawPDFPageRef = NULL; CGPDFDocumentRef drawPDFDocRef = NULL; @synchronized(self) // Briefly block main thread { drawPDFDocRef =

Displaying PDF files with python3

阅读更多关于 Displaying PDF files with python3

问题 I want to write a python3/PyGTK3 application that displays PDF files and I was not able to find a python package that allows me to do that. There is pypoppler, but it looks outdated (?) and does not seem to support python3 (?) Do you have any suggestions? EDIT: Note, that I don't need fancy features, like pdf forms, manipulation or writing. 回答1: It turns out, that newer versions of poppler-glib don't require bindings as such. They ship with GObject Introspection files and can therefore be

How to render whole pdf document using pdf.js library?

阅读更多关于 How to render whole pdf document using pdf.js library?

问题 I tried rendering PDF document using pdf.js library. I know only basics in javascript and I am new to promises, so at first I followed advice on this page: Render .pdf to single Canvas using pdf.js and ImageData (2. answer). But as a result, I rendered my document with all pages blank. All pictures and colors are fine, but not even a line of text. I also tried some other tutorials, but either I get the same result, or the document is completely missing. Right now, my code looks like this: (It

How to render whole pdf document using pdf.js library?

阅读更多关于 How to render whole pdf document using pdf.js library?

I tried rendering PDF document using pdf.js library. I know only basics in javascript and I am new to promises, so at first I followed advice on this page: Render .pdf to single Canvas using pdf.js and ImageData (2. answer). But as a result, I rendered my document with all pages blank. All pictures and colors are fine, but not even a line of text. I also tried some other tutorials, but either I get the same result, or the document is completely missing. Right now, my code looks like this: (It's almost identical to the tutorial) function loadPDFJS(pid, pageUrl){ PDFJS.disableWorker = true;