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       im_png2vips, im_png2vips - convert PNG images to and from VIPS format


       #include <vips/vips.h>

       int im_png2vips( const char *filename, IMAGE *out )

       int im_vips2png( IMAGE *in, const char *filename )


       im_png2vips(3)  reads  the  png image in filename, and writes the image
       out in VIPS format.

       im_vips2png(3) reads the  image  in  and  writes  a  PNG  file  to  the
       specified  filename.  The filename may include an optional mode string,
       following a ’:’ character, which you can use to specify compression and

       The mode string has the following syntax:


       where <compression> is an integer between 0 and 9 specifying the amount
       of compression (6  is  the  default),  and  <interlace>  is  0  for  no
       interlace (this is the default) and 1 for ADAM7 interlace.

       Beware  that  writing  an interlaced image is potentially up to 7 times
       slower than writing a non-interlaced image.

       The image is automatically converted to  RGB  or  Monochrome  (with  an
       optional alpha channel) before saving.


       The call:

         im_vips2png fred.v fred.png

       Writes a compression 6, uninterlaced PNG image.

         im_vips2png fred.v fred.tif:,1

       Writes an interlaced image.


       im_open(3), im_vips2tiff(3)


       Hey, you want this? You have it!

                                  3 Jan 2003                         IM_PNG(3)