NAME
lqr_carver_set_alpha_channel - sets the alpha channel index in a
LqrCarver object
SYNOPSIS
#include <lqr.h>
LqrRetVal lqr_carver_set_alpha_channel(LqrCarver * carver,
gint channel_index);
DESCRIPTION
The function lqr_carver_set_alpha_channel sets the alpha channel index
of the image stored in the LqrCarver pointed to by carver to
channel_index (between 0 and channels - 1, where channels is the number
of colour channels of the carver).
Use a negative value for cahnnel_index to specify that no alpha channel
is present.
If the specified channel coincides with the current value of the black
channel, the black channel is unset.
Calling this function sets the image time of the carver to
LQR_CUSTOM_IMAGE.
RETURN VALUE
The return value follows the Liquid Rescale library signalling system.
SEE ALSO
LqrImageType(3), lqr_carver_new(3), lqr_carver_set_image_type(3),
lqr_carver_set_black_channel(3), lqr_carver_get_image_type(3),
lqr_carver_get_channels(3)
COPYRIGHT
Copyright © 2007-2009 Carlo Baldassi