Re: unnamed function586 $$ AMDRadeon X4000GLDriver
Re: unnamed function586 $$ AMDRadeon X4000GLDriver
- Subject: Re: unnamed function586 $$ AMDRadeon X4000GLDriver
- From: Jonathan Mitchell <email@hidden>
- Date: Thu, 23 Jun 2016 21:51:13 +0100
> On 23 Jun 2016, at 21:39, Ken Thomases <email@hidden> wrote:
>
> O
>
> Are there any logs generated from the above call (other than your app's crash log)? Browse around within Console.app's log list to see.
Had a poke around but nothing significant that I can see.
>
>> CIFilter *colorFilter = [CIFilter filterWithName:@"CIColorControls"];
>> [colorFilter setDefaults];
>> [colorFilter setValue:image forKey:kCIInputImageKey];
>> [colorFilter setValue:[NSNumber numberWithFloat:saturationValue] forKey:kCIInputSaturationKey];
>> [colorFilter setValue:[NSNumber numberWithFloat:brightnessValue] forKey:kCIInputBrightnessKey];
>> [colorFilter setValue:[NSNumber numberWithFloat:contrastValue] forKey:kCIInputContrastKey];
>
> Any chance these values are out of valid range?
No. Everything looks sane. The range of arguments passed into the method is very small so there isn’t much variation.
>
>>
>> CIImage *filterImage = [colorFilter valueForKey:kCIOutputImageKey];
>>
>> [filterImage drawAtPoint:NSZeroPoint // << this is the call site that eventually aborts
>> fromRect:bounds
>> operation:NSCompositeCopy
>> fraction:alphaValue];
>
> What does it mean to use a potentially non-1.0 fraction for a copy to an as-yet-uninitialized image? No idea if that might contribute to the problem. Maybe clearing the image to some background color first would help.
>
> Also, have you considered using -[CIContext createCGImage:fromRect:] to create the image instead of drawing into a focus-locked NSImage? To get an NSImage from the CGImage, you can use [[NSImage alloc] initWithCGImage:… size:NSZeroSize].
Thanks for the suggestions I will give them a go.
J
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