What you need is to set base SDK to most recent (10.8), and set deployment
target to 10.6
Sandy
On Jun 20, 2013, at 5:11 PM, Thierry Cantet <thierry.can...@tvpaint.fr> wrote:
> Hello Richard,
>
> I have tried your solution, however it does not work.
>
> I have these messages when I try to build with the base SDK set to 10.6 :
> (Warning)Instance method '-convertRectToBacking:' not found (return type
> defaults to 'id')
> (Error)No viable conversion from 'id' to 'NSRect' (aka 'CGRect')
>
>
>
> Le 20/06/13 16:18, Richard Heard a écrit :
>> No retina devices can run 10.6, therefore you can safely assume 1.0.
>> This means you can use a runtime check for the selector, and if its not
>> available default to a 1.0 multiple
>> eg:
>>
>>> - (NSRect)backingBounds {
>>> if ([self respondsToSelector:@selector(convertRectToBacking:)]){
>>> return [self convertRectToBacking:self.bounds];
>>> }
>>> return self.bounds;
>>> }
>>
>> -Richard
>>
>> On 20/06/2013, at 11:49:18 PM, Thierry Cantet <thierry.can...@tvpaint.fr
>> <mailto:thierry.can...@tvpaint.fr>> wrote:
>>
>>> Hello !
>>>
>>> I have a quick question concerning Retina displays.
>>> My software uses OpenGL for displaying the pixels. However, on a Retina
>>> screen, OpenGL behaves strangely.
>>>
>>> There is a fix (
>>> https://developer.apple.com/library/mac/#documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/CapturingScreenContents/CapturingScreenContents.html#//apple_ref/doc/uid/TP40012302-CH10-SW1
>>> ) that requires you to use :
>>>
>>> NSRect backingBounds = [self convertRectToBacking:[self bounds]];
>>> GLsizei backingPixelWidth = (GLsizei)(backingBounds.size.width),
>>> backingPixelHeight = (GLsizei)(backingBounds.size.height);
>>> glViewport(0, 0, backingPixelWidth, backingPixelHeight);
>>>
>>> inside the drawRect method.
>>>
>>> The main issue is, the /convertRectToBacking/ method exists only since OS X
>>> 10.7, and my software still supports OS X 10.6 (so I need to build it with
>>> a 10.6 SDK, and not 10.7).
>>> I could drop the 10.6 support, but that is not an option for now.
>>>
>>> I have looked for another way, and I found the /backingScaleFactor/ method
>>> (it returns the scale factor, which is 2 for Retina displays, and 1 for
>>> other screens). But then again, this method is available only from 10.7.
>>>
>>> So, my question is, is there any way of detecting a Retina display, but
>>> usable with 10.6 ?
>>>
>>> Thanks in advance :)
>>>
>>> --
>>> Thierry CANTET
>>>
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>>
> --
> Thierry CANTET
>
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