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PS_OPEN_IMAGE(3) Library Functions Manual PS_OPEN_IMAGE(3)
uwe@steinmann.cx
UWE STEINMANN 2003-2011Uwe SteinmannMarch 21, 2011;
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 ex-
pect 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 chan-
nel. 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 tem-
plates. This behaviour can be turned off by setting the pa-
rameter `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.
PS_OPEN_IMAGE(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | AUTHOR
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