Rendering a CGPDFPage into a UIImage

Question

I\'m trying to render a CGPDFPage (selected from a CGPDFDocument) into a UIImage to display on a view.

I have the following code in MonoTouch which gets me part wa

Answer 1

I haven't worked with MonoTouch. However, in objective-C you would get an image for a PDF page like this (notice the CTM transforms):

-(UIImage *)getThumbForPage:(int)page_number{
 CGFloat width = 60.0;

    // Get the page
 CGPDFPageRef myPageRef = CGPDFDocumentGetPage(myDocumentRef, page);
 // Changed this line for the line above which is a generic line
 //CGPDFPageRef page = [self getPage:page_number];

 CGRect pageRect = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
 CGFloat pdfScale = width/pageRect.size.width;
 pageRect.size = CGSizeMake(pageRect.size.width*pdfScale, pageRect.size.height*pdfScale);
 pageRect.origin = CGPointZero;


 UIGraphicsBeginImageContext(pageRect.size);

 CGContextRef context = UIGraphicsGetCurrentContext();

 // White BG
 CGContextSetRGBFillColor(context, 1.0,1.0,1.0,1.0);
 CGContextFillRect(context,pageRect);

 CGContextSaveGState(context);

    // ***********
 // Next 3 lines makes the rotations so that the page look in the right direction
    // ***********
 CGContextTranslateCTM(context, 0.0, pageRect.size.height);
 CGContextScaleCTM(context, 1.0, -1.0);
 CGContextConcatCTM(context, CGPDFPageGetDrawingTransform(page, kCGPDFMediaBox, pageRect, 0, true));

 CGContextDrawPDFPage(context, page);
 CGContextRestoreGState(context);

 UIImage *thm = UIGraphicsGetImageFromCurrentImageContext();

 UIGraphicsEndImageContext();
 return thm;

}