Rafael hi Thanks for the info,, I will be testing the behavior with some pdfs and see whats better, to keep the CGPDFDocumentRef and destroy it when closing the pdf.. or open-close each time I change.. I guess I must decided what I want speed vs memory usage.
.... G, On 19.5.2010, at 15:02, Rafael Cerioli wrote: > Hi Gustavo, > > When you draw a CGPDFPageRef into a graphic context, Quartz will hold images > inside the PDF page in a sort of cache (at least, it seems with Instrument > Object Alloc). You can only empty that cache by destroying the > CGPDFDocumentRef. > > However, if you do not destroy your CGPDFDocumentRef between two consecutive > renderings, you will gain speed. > I suggest that you test what best fits you. It depends on the rendering speed > you need, and the size of the images in your PDF. > And don't forget to use instruments. > > > Le 19 mai 2010 à 07:32, Gustavo Pizano a écrit : > >> Laurent hi. >> About your warning. >> >> SO If I have a pdf of many many pages, I shall just open de CGPDFDocument, >> then get the required page using CGPDFDocumetnGetPage(), dra the page then >> release the CGPDDocument?.. and when swapping pages just release the current >> page, open document again get next page and render?... I don't like this >> opening and closing CGPDFDocument... but shall it be like this? that only I >> actually load into memory the page Im drawing using the CGContextDrawPDFPage? >> >> G. >> >> >> On 19.5.2010, at 12:11, Laurent Cerveau wrote: >> >>> Gustavo >>> >>> You can use the CGPDF API. However be careful on memory usage (in >>> particular keeping the CGPDFDocument open all the time could lead to some >>> memory issues that could be workarounded by closing and reopening it) >>> >>> Regards >>> >>> laurent >>> >>> >>> On Wednesday, May 19, 2010, at 12:07PM, "Gustavo Pizano" >>> <gustavxcodepic...@gmail.com> wrote: >>>> Hello all. >>>> >>>> I would want to know if I can render pdf into iPad using quartz, or I >>>> have to use UIWebView... or whats the way to achieve this? >>>> >>>> >>>> Any headlights are appreciate it. >>>> >>>> thanks >>>> >>>> Gustavo >>>> >>>> _______________________________________________ >>>> >>>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >>>> >>>> Please do not post admin requests or moderator comments to the list. >>>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >>>> >>>> Help/Unsubscribe/Update your Subscription: >>>> http://lists.apple.com/mailman/options/cocoa-dev/lcerveau%40me.com >>>> >>>> This email sent to lcerv...@me.com >>>> >>>> >> >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/rafael.cerioli%40gmail.com >> >> This email sent to rafael.ceri...@gmail.com > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
