57 lines
1.5 KiB
Groff
57 lines
1.5 KiB
Groff
.TH IM_PNG 3 "3 Jan 2003"
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.SH NAME
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im_png2vips, im_png2vips_header, im_png2vips \- convert PNG images to and from VIPS format
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.SH SYNOPSIS
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#include <vips/vips.h>
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int im_png2vips( const char *filename, IMAGE *out )
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int im_png2vips_header( const char *filename, IMAGE *out )
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int im_vips2png( IMAGE *in, const char *filename )
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.SH DESCRIPTION
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.B im_png2vips()
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reads the png image in filename, and writes the image out
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in VIPS format.
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.B im_png2vips_header()
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reads just the header information from the PNG file. You can't read any
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pixels!
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.B im_vips2png()
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reads the image in and writes a PNG file to the specified
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filename. The filename may include an optional mode string, following a ':'
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character, which you can use to specify compression and interlace.
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The mode string has the following syntax:
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<compression>,<interlace>
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where <compression> is an integer between 0 and 9 specifying the amount of
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compression (6 is the default), and <interlace> is 0 for no interlace (this is
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the default) and 1 for ADAM7 interlace.
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Beware that writing an interlaced image is potentially up to 7 times slower
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than writing a non-interlaced image.
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The image is automatically converted to RGB or Monochrome (with an optional
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alpha channel) before saving.
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.SH EXAMPLES
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The call:
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im_vips2png fred.v fred.png
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Writes a compression 6, uninterlaced PNG image.
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im_vips2png fred.v fred.tif:,1
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Writes an interlaced image.
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.SH SEE ALSO
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im_ispng(3), im_vips2tiff(3)
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.SH COPYRIGHT
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Hey, you want this? You have it!
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