On 03/26/2011 04:24 PM, Moritz Moeller wrote:
> I seems calling asap_update() before request() solves it.
> [...]
> I have to run more tests to confirm but so far it looks like it is a
> workaround to the "black rows on first request()" issue.
Correction. I also have a check for is_zero() in my loop!
If I remove this check, I get black pixels again.
It really looks like the is_zero() request is pulling the data. Again,
this doesn't help if asap_update() wasn't called before. Code looks like
this:
_node->asapUpdate();
_node->request( Mask_RGBA, 1 );
ChannelSet channelMask( Mask_RGBA );
channelMask &= _node->info().channels();
unsigned short channels( channelMask.size() );
Row row( 0, width );
bool allZero( true );
for ( unsigned short scanLine( 0 );
scanLine < height;
++scanLine )
{
_node->get( scanLine, 0, width, channelMask, row );
foreach( channel, channelMask ) {
if( !row.is_zero( channel ) ) {
allZero = false;
}
// use row[ channel ] somehow
}
}
This works but is a big wtf for me now. Any insights as to what I may be
missing are still welcome. :)
Again, for the 2nd request, it always works, even if I do not call
asap_update() or is_zero().
.mm
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