Re: CGImageDestinationFinalize image destination does not have enough images ?
Re: CGImageDestinationFinalize image destination does not have enough images ?
- Subject: Re: CGImageDestinationFinalize image destination does not have enough images ?
- From: Ken Ferry <email@hidden>
- Date: Tue, 1 Sep 2009 17:08:29 -0700
Hi,
-[NSBitmapImageRep representationOfImageRepsInArray:usingType:properties:]
requires an array of NSBitmapImageReps, not arbitrary NSImageReps.
-Ken
On Tue, Sep 1, 2009 at 3:26 AM, DairyKnight <email@hidden> wrote:
> Hi,
> I'm trying to extract pages from PDF files and save them to jpg. But keep
> getting the 'doesnt have enough images'
> error. Anyone knows why?
>
> Thanks.
>
> Here's the code:
>
> // Opens the pdf file and gets the PdfPage
>
> PDFDocument *pdfDoc = [[PDFDocument alloc] initWithURL:[NSURL
> fileURLWithPath:filename]];
>
> PDFPage *page = [pdfDoc pageAtIndex:1];
>
> NSPDFImageRep *pdfImg = [NSPDFImageRep imageRepWithData:[page
> dataRepresentation]];
>
> NSSize size;
>
> size.width = 1024;
>
> size.height = 768;
>
> NSImage *img = [[NSImage alloc] initWithSize:size];
>
> [img lockFocus];
>
> // Draw the pdf page in an offscreen NSImage
>
> [pdfImg drawInRect:NSMakeRect(0, 0, 1024, 768)];
>
> [img unlockFocus];
>
> [img setCacheMode:NSImageCacheNever];
>
> if (![img isValid])
>
> NSLog(@"img is not valid");
>
> [imgView setImage:img];
>
>
> // Saves the NSImage to disk.... getting the error
>
> NSArray *representations;
>
> NSData *bitmapData;
>
> representations = [img representations];
>
> bitmapData = [NSBitmapImageRep representationOfImageRepsInArray
> :representations
>
> usingType:NSJPEGFileType properties:nil];
>
> [bitmapData writeToFile:@"/Users/Tom/test.jpeg" atomically:YES];
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