Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Image within a custom NSView gets blurrier as I scale

Yes.
I want to be able to scale +/- a bitmap image.
I can do it with the change of size; but the quality deteriorates (upon return to original size).

That is, given the initial scale of 1.0; reduce or enlarge it; return to original 1.0 scale.
The result quality is LESS than the original image.

And the image gets more blurred as you change the scale, back/forth.

So my question is, do I actually need to re-compose the image upon the NSView?
Or, do some sort of NSAffineTransform or something?

What is the efficient (w/out loss of image resolution) way of scaling an image within a NSView (vs. NSImageView)?

Ric.

On Apr 11, 2006, at 12:45 PM, Corey O'Connor wrote:

Are you trying to scale the image to a size greater than it's original
resolution?

-Corey

On 4/10/06, Frederick C. Lee <email@hidden> wrote:
Greetings:
I have an image within a customized NSView via compositeToPoint
method. The bitmap image gets blurrier as I scale it.
How can I maintain the original quality/resolution as I scale?

Regards,

Ric.



=============================
//  EWMainImageView.m
...
- (void)drawRect:(NSRect)rect {
     [super drawRect:rect];

     if (nil != [self image]) {
         [[self image] compositeToPoint:([self bounds].origin)
operation:NSCompositeSourceOver];
     }

     [[NSColor redColor] set];
     [bezierPath stroke];

} // end drawRect().
...
- (void)setScale:(float)factor {
NSSize imageSize = [self origImageSize];
imageSize.width *= factor;
imageSize.height *= factor;
[[self image]setSize:imageSize];
[self setNeedsDisplay:YES];
}
...
===========================
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/coreyoconnor% 40gmail.com

This email sent to email@hidden



--
-Corey O'Connor


_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/email@hidden

This email sent to email@hidden
References: 
 >Image within a custom NSView gets blurrier as I scale (From: "Frederick C. Lee" <email@hidden>)
 >Re: Image within a custom NSView gets blurrier as I scale (From: "Corey O'Connor" <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.