Re: imshow problem under OS X

[Marius Schamschula]

Carnë

On Mar 9, 2015, at 9:48 AM, Carnë Draug <address@hidden> wrote:

> On 9 March 2015 at 14:10, Marius Schamschula <address@hidden> wrote:
>> Carnë,
>> 
>> On Mar 9, 2015, at 6:11 AM, Carnë Draug <address@hidden> wrote:
>> 
>>> On 9 March 2015 at 11:03, Marius Schamschula <address@hidden> wrote:
>>>> 
>>>> The GraphicsMagick issue is separate from the imshow issue: I get a warning
>>>> regardless of if GraphicsMagick is built with a depth of 8 or 16 bits.
>>>> 
>>> 
>>> As you should. You will not have a warning if you build it with 
>>> quantum-depth 32
>>> (but then all your images will take 4 times more memory during the reading 
>>> and
>>> writing --- but not after the reading or writing).
>>> 
>>> Carnë
>> 
>> Thanks for the clarification.
>> 
>> The MacPorts default is 8 bit. When I checked the Octave wiki [1], it
>> suggested to pass --with-quantum-depth=16 to configure. I rebuilt
>> GraphicsMagick with this setting and again saw the warning. The wiki
>> needs to be updated.
>> 
> 
> No it does not.  Unless you really have 32bit image files, you do not want
> to build with quantum depth 32.  And even if you, I'd recommend you use 2
> different builds, one with 32 and another with 16 (or maybe 8).
> 
> If you build with quantum-depth 32, your images will take up 4 times more
> more memory during the reading.  And that's the uncompressed size.  Using
> quantum-depth 16 is a good compromise, it will keep the vast majority of
> users happy without causing a massive memory overhead.
> 
> I wrote some text on the wiki's Debian page about it [1]
> 
> Carnë
> 
> [1] http://wiki.octave.org/GraphicsMagick#Quantum_depth

I also think 16 bits should be enough. 

However, I find the warning message a bit confusing, especially for end users. 
Is there a way to disable this message?

Marius
--
Marius Schamschula