PS_OPEN_IMAGE(3)PS_OPEN_IMAGE(3)
uwe@steinmann.cx
UWE STEINMANN 2003-2011Uwe SteinmannMarch 21, 2011;
NAMEPS_open_image — Reads an image for later placement
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 com‐
ponents 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 replay‐
ing 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 ALSOPS_open_image_file(3), PS_place_image(3), PS_close_image(3)AUTHOR
This manual page was written by Uwe Steinmann uwe@steinmann.cx.
PS_OPEN_IMAGE(3)
