IM_PNG(3)

NAME
im_png2vips, im_png2vips_header, im_png2vips - convert PNG images to and from VIPS format

SYNOPSIS
#include <vips/vips.h> int im_png2vips( const char *filename, IMAGE *out ) int im_png2vips_header( const char *filename, IMAGE *out ) int im_vips2png( IMAGE *in, const char *filename )

DESCRIPTION
im_png2vips() reads the png image in filename, and writes the image out in VIPS format. im_png2vips_header() reads just the header information from the PNG file. You can't read any pixels! im_vips2png() 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 interlace. The mode string has the following syntax:
  <compression>,<interlace> 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.

EXAMPLES
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.

SEE ALSO
im_ispng(3), im_vips2tiff(3)

COPYRIGHT
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