Legacy ImageMagick Discussions Archive

by grabbing negative areas with AcquireImagePixels() (e.g.
AcquireImagePixels(image,-3,-3,image->columns+7,7)), what does it mean?

See http://magick.imagemagick.org/script/ar ... .php#cache for a discussion of virtual pixels (e.g. pixels outside the image region).

Just to me more clear. the negative was a position, not an area.

meaning of acquireImagepixels() method with negative area?