status = image:SetMaskImage(maskimage)
image:SetMaskImage()
sets the mask image. maskimage
must be a 1-bit gray-scale image.
#HPDF_INVALID_IMAGE
- An invalid image handle was set.
#HPDF_INVALID_BIT_PER_COMPONENT
- An invalid bit-per-component.
#HPDF_FAILED_TO_ALLOC_MEM
- Memory allocation failed.