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Man Pages


Manual Reference Pages  -  PS_OPEN_IMAGE (3)

      uwe@steinmann.cx    

UWE STEINMANN 2003-2011Uwe SteinmannMarch 21, 2011;

NAME

PS_open_image — Reads an image for later placement

CONTENTS

SYNOPSIS

#include <pslib.h>

int PS_open_image(PSDoc *psdoc, char *type, char *source, char *data, int lenght, int width, int height, int components, int bpc, const char *params)

DESCRIPTION

Reads an image which is already available in memory. The parameter
                 source is currently not evaluated and assumed
                        to be ‘memory’. The parameter type can be either
                        ‘raw’ or ‘eps’. Images in raw format are expected to be a stream of pixels
                        starting in the upper left and ending in the lower right corner. Each
                        pixel is a tuple of components representing the colors. Each component
                        consists of bpc bit. Color imgags expect the
                        components to be stored in RGB or CMYK order. The number of components
                        implies the colorspace. 4 components imply a CMYK image and not an
                        RGB image with an alpha channel. This restriction may be removed in
                        later versions.

EPS images are expect as stored in a file. There is no need to
                 set any other paramter. The height und width of the image is
                        taken from the bounding box within the image data.

Since version 0.4.5 of pslib images are read by default for later
                        reuse. This means that the image is saved into a so called reusable
                        stream object. Later calls of PS_place_image(3) will only put a short
                        sequence of postscript code into the output file replaying the image.
                        This reduces the overall postscript file size, speeds up its processing by
                        the postscript rip and allows to place images into templates. This
                        behaviour can be turned off by setting the parameter ‘imagereuse’
                        to false with PS_set_parameter(3).

RETURN VALUE

Returns identifier of the image or zero in case of an error.
                 The identifier is a positiv number greater 0.

SEE ALSO

PS_open_image_file(3), PS_place_image(3), PS_close_image(3)

AUTHOR

This manual page was written by Uwe Steinmann uwe@steinmann.cx.

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