On Dec 21, 2009, at 8:02 PM, Development wrote:
> Then I don't understand how to do this.
>
> Do I create the context at this larger size? because that's what I did.
> Do I drawInRect the image at it's original size? Because that's what I did.
>
> As near as I can tell, no matter what I do, the image itself, not accounting
> for the shadow, is drawn in the upper left corner. this causes a negative
> shadow, or one to the upper left, to be cut off by the edge of the context.
> I have attempted using drawAtPoint, and accounting for the negative shadow by
> moving the point an amount that should accommodate the shadow. It did not
> work.
>
> Now if the shadow is to the lower right, the adjustments I make work
> perfectly every time and the shadow is exactly what it should be.
>
> I think the point is that I do not understand the context drawing. I thought
> I did but it should be painfully obvious from this thread that I do not.
Are you aware that the context you get from UIGraphicsBeginImageContext has
its origin
at upper left ?
In any case, I have posted a mini example that *appears* to do what you want,
but based
on the descriptions, I might have misunderstood, in which case please excuse me
for
wasting bandwidth . . .
The project is here:
http://www.trilithon.com/download/Shadow.zip
Cheers,
. . . . . . . . Henry
>
>
>
>
> On Dec 21, 2009, at 8:45 PM, Graham Cox wrote:
>
>>
>> On 22/12/2009, at 1:49 PM, Development wrote:
>>
>>> however what I am getting now is a larger image, offset in the view and
>>> still cutting off the shadow. So I honestly do not know how I am suppose to
>>> draw this shadow. I would really be grateful for some additional direction.
>>
>>
>> Try thinking instead of flailing about throwing code at it.
>>
>> You need a bigger image to accommodate the shadow. But the image you want to
>> composite on top is the same size as it always was. So you need to keep its
>> original size around so you can draw it at that size but into the larger
>> image context. If you draw it at the new size you are back at square one,
>> but larger.
>>
>> --Graham
>>
>>
>
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