Re: Rendering grayscale on opengl using nsbitmaprep

[Indie AN]

Hi, your repeated assertion made me look back on my code. I found a
flaw. I am initializing nsbitmaprep from the data obtained from
nsimage using method tiffreprentation. I guess it should have been
tiffrepresentationwithcompression:none. I really messed up with my
code and cant test it right now. Thanks for pointing right direction.

On 2/23/11, Fred Kiefer <fredkiefer@gmx.de> wrote:
> Thank you, with that explanation I finally understand where you trying
> to get to. And the code that I pointed you to should work quite well for
> that purpose. My feeling is still that your code that is calling this
> has a problem. If you want you can send me the code off line and I have
> a quick look at what may go wrong here.
>
> Fred
>
> Am 23.02.2011 05:21, schrieb Indie AN:
>> Ok. Let me clear it for once. I am trying to render image using
>> opengl, that we normally do for games. Opengl do not speak nsimage.
>> They speak textures . All i needed is magic piece of code that
>> converts every image to raw rbga or rbg data. In mac they do using
>> coreimage framework.         But its ok. I can live happily without
>> gray scale images. White image is sufficient.  Thanks to everybodies
>> time.
>>
>> On 2/16/11, Fred Kiefer <fredkiefer@gmx.de> wrote:
>>> Sorry, I still don't understand your problem. Why are you converting the
>>> image? The standard code should work fine in displaying it. Actually the
>>> code I pointed you to is used for that.
>>> From your screen shot I would expect that your drawing code uses the
>>> wrong sizes. To verify this it would help if you sent a bit more of your
>>> code.
>>>
>>> Fred
>>>
>>> PS: For drawing pre-multiplied images get used. Better convert in to
>>> that format. But this is completely unrelated to your problem.
>
>

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