Copy a part of src_im onto
dst_im starting at the x,y coordinates
src_x, src_y with
a width of src_w and a height of
src_h. The portion defined will be copied
onto the x,y coordinates, dst_x and
dst_y.
dst_imDestination image link resource
src_imSource image link resource
dst_xx-coordinate of destination point
dst_yy-coordinate of destination point
src_xx-coordinate of source point
src_yy-coordinate of source point
src_wSource width
src_hSource height
pct
The two images will be merged according to pct
which can range from 0 to 100. When pct = 0,
no action is taken, when 100 this function behaves identically
to imagecopy() for pallete images, while it
implements alpha transparency for true colour images.