imageGrayToMono
Gray-to-monochrome color setting for rasterization.
[read-only property]
imageGrayToMono([out, retval] int *color)
Specifies grayscale (8-bit) rasterization, converted to monochrome (1-bit).
This property is only useful as an argument to
convertPageToPicture, convertRegionToPicture,
writePageBitmap, or writeRegionBitmap.