Re: Image within a custom NSView gets blurrier as I scale
Re: Image within a custom NSView gets blurrier as I scale
- Subject: Re: Image within a custom NSView gets blurrier as I scale
- From: "Frederick C. Lee" <email@hidden>
- Date: Tue, 11 Apr 2006 13:28:12 -0700
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];
}
...
===========================
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--
-Corey O'Connor
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