IM_PNG(3) 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 inter-
lace (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
Hey, you want this? You have it!
3 Jan 2003 IM_PNG(3)
im_png2vips 7.14.5 - Generated Mon Sep 8 18:36:07 CDT 2008