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Section: C Library Functions (3) Updated: 3 Jan 2003
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NAME

im_png2vips, 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_vips2png( IMAGE *in, const char *filename )

 

DESCRIPTION

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 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_open(3), im_vips2tiff(3)  

COPYRIGHT

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Index

NAME
SYNOPSIS
DESCRIPTION
EXAMPLES
SEE ALSO
COPYRIGHT

This document was created by man2html, using the manual pages.
Time: 21:48:27 GMT, April 16, 2011