I think it's begin/end, not begin/number. So it would be
> file->read_scanlines(spec.width, spec.height, 0, i, i+1, spec.format,
> out_data);
Unless it's not working properly?
On May 31, 2013, at 12:01 AM, Michel Lerenard wrote:
> Colin,
> quite simple:
> for (int i=0; i < spec.nchannels ; i++){
> file->read_scanlines(spec.width, spec.height, 0, i, 1,
> spec.format, out_data);
> //...do whatever you want with out_data
> }
>
> 'i' tells you need the i-th channel, the 1 after that you want to read only
> one channel.
>
> This snippet reads entire channels one after the other.
>
> On 05/30/2013 10:48 PM, Larry Gritz wrote:
>> You can't request the channels be returned and not interleaved.
>>
>> But there are varieties of read_scanlines and read_tiles that let you select
>> a channel range (including just one channel), so you could do it with one
>> call per channel. Look in imageio.h for the calls with "chbegin" and
>> "chend" in the argument lists.
>>
>>
>>
>> On May 29, 2013, at 5:13 PM, Colin Doncaster wrote:
>>
>>> Hi there -
>>>
>>> What is the default buffer layout when using read_image(TypeDesc::FLOAT,
>>> data)? It appears to be interleaved channels ( rgbargba... ), if that's
>>> the case is it possible to request the data to NOT be interleaved (
>>> rrrrggggbbbb... )? It appears that we can define stride lengths but for
>>> dimensions of the whole image, not the channels themselves.
>>>
>>> Thank you!
>> --
>> Larry Gritz
>> [email protected]
>>
>>
>> _______________________________________________
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>> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
>
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--
Larry Gritz
[email protected]
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