NAME¶
PS_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 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.