Sorry to be so late to the party. What Ken suggested will work. But generally, watermarks, header, and footers are drawn via your own -drawPageBorderWithSize: method.
http://developer.apple.com/library/mac/#documentation/cocoa/conceptual/Printing/Tasks/PaginatingViews.html%23//apple_ref/doc/uid/20000912-BBCHHAHI -raleigh On Jan 15, 2011, at 1:18 PM, Ken Ferry wrote: > Hi Olivier, > > Unless I misread this, this section cannot be doing anything helpful: > > NSImageView *tempIm = [[NSImageView alloc] initWithFrame:frontRect]; >> [tempIm setImage:[cusThumbFront image]]; >> >> NSData* theData = [tempIm dataWithPDFInsideRect:[tempIm bounds]]; >> NSPDFImageRep* pdfRep = [NSPDFImageRep imageRepWithData:theData]; >> >> // Create a new image to hold the PDF representation. >> NSImage* pdfImage = [[NSImage alloc] initWithSize:IMG_SIZE]; >> [pdfImage addRepresentation:pdfRep]; > > > > Have you tried just using [cusThumbFront image] instead of going through > this? The system cannot create data where there isn't any, so the pdfImage > cannot contain any data that wasn't already in the cusThumbFrontImage. > > Okay, that aside, it happens I haven't implemented printing before, so > forgive me if it turns out this is a non-standard way to do things. > > It is the subview hierarchy that is printed. If you want to put a watermark > on top of an image, have a view that draws the base image and then draws the > watermark image. Or, make a subview of the view that draws the base that > draws the watermark. > > It is possible to produce an NSImage that has the watermark and still has > all the quality available in the original, I just suspect it isn't the most > straightforward way to do what you'd like to here. > > The way you'd make such an image is to subclass NSImageRep. Subclassing > NSImageRep is pretty much the same as subclassing NSView. Where in NSView > you override drawRect:, in NSImageRep you override -draw. The main > difference between an image and a view is in the guarantees on how they > scale. If you stretch a button horizontally, the text doesn't stretch out, > it stays centered. An image scales… like an image (i.e. linearly). > > So here's how you might make an NSImageRep that drew a base image and an > overlay without rasterizing anything, even though I think this isn't the > best way to solve your problem. > > @interface CompositeImageRep : NSImageRep { > > NSImage *_baseImage; > > NSImage *_overlayImage; > > > > NSRect _overlayFrame; > > } > > > - (id)initWithBaseImage:(NSImage *)baseImage > overlayImage:(NSImage*)overlayImage overlayFrame:( > NSRect)overlayFrame; > > > @property (readonly) NSImage *baseImage; > > @property (readonly) NSImage *overlayImage; > > @property (readonly) NSRect overlayFrame; > > > @end > > @implementation CompositeImageRep > > > - (id)initWithBaseImage:(NSImage *)baseImage > overlayImage:(NSImage*)overlayImage overlayFrame:( > NSRect)overlayFrame { > > NSParameterAssert(baseImage != nil); > > > > self = [super init]; > > if (self) { > > { > > _baseImage = [baseImage retain]; > > _overlayImage = [overlayImage retain]; > > _overlayFrame = overlayFrame; > > > [self setSize:[baseImage size]]; > > } > > } > > > > return self; > > } > > > -(void)dealloc { > > [_baseImage release]; > > [_overlayImage release]; > > [super dealloc]; > > } > > > > - (BOOL)draw { > > NSRect bounds = (NSRect){NSZeroPoint, [self size]}; > > > > [_baseImage drawInRect:bounds fromRect:NSZeroRect operation: > NSCompositeSourceOver fraction:1.0]; > > [_overlayImage drawInRect:_overlayFrame fromRect:NSZeroRect operation: > NSCompositeSourceOver fraction:1.0]; > > return YES; > > } > > > - (id)copyWithZone:(NSZone *)zone { > > CompositeImageRep *rep = [super copyWithZone:zone]; > > // careful - superclass uses NSCopyObject. :-( > > rep->_baseImage = [_baseImage retain]; > > rep->_overlayImage = [_baseImage retain]; > > rep->_overlayFrame = _overlayFrame; > > return rep; > > } > > > @synthesize baseImage=_baseImage, overlayImage=_overlayImage, > overlayFrame=_overlayFrame; > > > @end > > > > On Tue, Jan 11, 2011 at 7:57 AM, Olivier Palliere < > oliv...@sunprotectingfactory.com> wrote: > >> Hi Guys, >> >> >> >> I'm working on an app for my personal use that needs to print images I drag >> on an NSImageView to display a thumbnail. >> >> >> >> Source images are about 500x500 at 300dpi for most. >> >> >> >> When I want to print them, I use this snippet of code from Apple's >> doc: >> >> frontRect = NSMakeRect(0,0,500, 500); >> >> >> >> NSImageView *tempIm = [[NSImageView alloc] initWithFrame:frontRect]; >> [tempIm setImage:[cusThumbFront image]]; >> >> NSData* theData = [tempIm dataWithPDFInsideRect:[tempIm bounds]]; >> NSPDFImageRep* pdfRep = [NSPDFImageRep imageRepWithData:theData]; >> >> // Create a new image to hold the PDF representation. >> NSImage* pdfImage = [[NSImage alloc] initWithSize:IMG_SIZE]; >> [pdfImage addRepresentation:pdfRep]; >> >> >> >> When I add this image to a NSImageView and give it to a printOperation, it >> is printed crystal clear with the right resolution. >> >> >> >> If I try however, to draw this image in a new one to add my borders like >> this: >> >> >> [compositeImage lockFocus]; >> [pdfRep drawInRect:frontRect fromRect:NSZeroRect >> operation:NSCompositeSourceOver >> fraction:1.0]; >> >> fpath = [NSBezierPath bezierPathWithRect:frontRect]; >> [fpath setLineWidth:1]; >> [[NSColor blackColor] set]; >> [fpath stroke]; >> [compositeImage unlockFocus]; >> >> >> >> (I tried to drawInRect both the PDFImageRep or the NSImage directly with >> the same failed results) >> >> >> >> The resulting image looses the printing resolution and the printed image >> is blurry. I read similar posts that explains that >> lockFocus/unlockFocus rasterizes the image, and that I should use PDFKit >> but the doc on that one is sparse (to me at least). I also found some >> post indicating I should use bestRepresentationForDevice but this method >> is deprecated in 10.6 which is my target system. >> >> >> >> >> >> What would be the best way to have my high res picture print with my >> watermark on it? >> >> >> >> I know from my unsuccessful searches for the past weeks that this theme >> has been addressed several times but I just can't seem to find an easy >> answer to my problem. >> >> >> >> Many thanks for your help, >> >> Olivier./. >> >> _______________________________________________ >> >> 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/kenferry%40gmail.com >> >> This email sent to kenfe...@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/ledet%40apple.com > > This email sent to le...@apple.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
