Re: CGShading

FROM : John C. Randolph
DATE : Tue Oct 12 20:48:39 2004

On Oct 12, 2004, at 11:38 AM, John C. Randolph wrote:



>
> On Aug 1, 2004, at 9:27 AM, Ricky Sharp wrote:
>
>
>
>

>> On Aug 1, 2004, at 9:13 AM, Ricky Sharp wrote:
>>
>>
>>

>>>  Here's some sample code that creates a pretty cool gradient by 
>>> using a Category for NSImage:
>>>
>>> <http://developer.apple.com/samplecode/Transformed_Image/

>>> Transformed_Image.html>
>>>

>
> When I wrote that code, CGShading wasn't available.  If I were 
> writing that sample today, I'd use GCShading.  I should also point out 
> that the code assumes that bytesPerRow == pixelsWide, which isn't 
> necessarily the case.


Correction:  I meant to say it assumes that bytesPerRow  == (pixelsWide 
*  4), which isn't necessarily true.  In future versions of AppKit and 
CoreImage, bitmaps may get padded to allow for word or long word 
alignment for optimization.

-jcr




John C. Randolph <<email_removed>> (408) 974-8819
Sr. Cocoa Software Engineer,
Apple Worldwide Developer Relations
http://developer.apple.com/cocoa/index.html