Load and render a page from PDF with QuartzCore

PDFDocument.cpp

#import "PDFDocument.h"


bool PDFDocument::loadDocument(const char *filename){

  CFStringRef path; 
  CFURLRef url; 
  CGPDFDocumentRef document; 
  size_t count;
  
  path = CFStringCreateWithCString (NULL, filename, kCFStringEncodingUTF8);
  url = CFURLCreateWithFileSystemPath (NULL, path, // 1 kCFURLPOSIXPathStyle, 0);
  CFRelease (path);
  
  document = CGPDFDocumentCreateWithURL (url);// 2
  CFRelease(url);
  
  count = CGPDFDocumentGetNumberOfPages (document);// 3
  
  if (count == 0) {
    printf("`%s' needs at least one page!", filename);
    return false;
  }
  
  mDocument = document;
  
  return true
}

void PDFDocument::drawPage(CGContextRef myContext, size_t pageNumber) {

  assert(mDocument);
  
  CGPDFPageRef page; 
  page = CGPDFDocumentGetPage (mDocument, pageNumber); 
  CGContextDrawPDFPage (myContext, page);
  
}

PDFDocument.h

#pragma once

#import <QuartzCore/QuartzCore.h>

class PDFDocument{
public:
  bool loadDocument(const char *filename);
  void drawPage(CGContextRef myContext, size_t pageNumber);
private:
  CGPDFDocumentRef mDocument;
}