The answer to this is a bit lateral:
Let's say we have some image data in memory that is 128x128. We
want to draw it into an NSImage that is 128x128. We can do
something like this:
//--------------------------------------------
// draw image data into a new NSImage, without any tiling
NSSize aSize = NSMakeSize(128, 128);
NSRect newImageRect = NSMakeRect(0, 0, aSize.width, aSize.height)
NSImage *newImage = [[NSImage alloc] initWithSize:aSize];
[newImage lockFocus];
[yourOtherImageData drawInRect:newImageRect fromRect:newImageRect
operation:NSCompositeSourceAtop fraction:1.0];
[newImage unlockFocus];
//--------------------------------------------
Let's say, though, that we have a 10x128 image that we want to
tile into a 128x128 square. If we're using NSImage, we can do this
with NSImage to accomplish that:
//--------------------------------------------
// draw image data into a new NSImage, tiling a 10px-wide image
horizontally
NSRect imageTileRect = NSMakeRect(0, 0, 1, [yourOtherImageData
size].height)
NSSize aSize = NSMakeSize(10, 128);
NSRect newImageRect = NSMakeRect(0, 0, aSize.width, aSize.height)
NSImage *newImage = [[NSImage alloc] initWithSize:aSize];
[newImage lockFocus];
[yourOtherImageData drawInRect:newImageRect fromRect:imageTileRect
operation:NSCompositeSourceAtop fraction:1.0];
[newImage unlockFocus];
//--------------------------------------------
What happens is that you're telling newImage to fill its entire
rect with an image smaller than the newImageRect dimensions, so
NSImage automatically tiles the drawn image.
Note: Untested code, written in e-mail, may contain typos or other
errors. But you get the idea.
--
Michael Watson
On 27 Jul, 2006, at 18:16, Alan Smith wrote:
It would help if I knew how to "tile" an NSImage. In your
explanation
it seems that I just make an NSImage with a 1px wide image and
I'm all
set. Well, I need the image to repeated over and over again in one
direction, creating a "bar." I can't figure out how to do this with
NSImage.
Thanks for being so patient, Alan
--
// Quotes from yours truly -------------------------
"You don't forget, you just don't remember."
"Maturity resides in the mind."
"Silence is the Universe's greatest gift."
"Don't waste your life doing things others have already done."
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