1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
plscompression: Set device-compression level
DESCRIPTION:
This function is used in example 31.
SYNOPSIS:
plscompression(compression)
ARGUMENTS:
compression (PLINT, input) : The desired compression level. This is
a device-dependent value. Currently only the jpeg and png devices
use these values. For jpeg value is the jpeg quality which should
normally be in the range 0-95. Higher values denote higher quality
and hence larger image sizes. For png values are in the range -1
to 99. Values of 0-9 are taken as the compression level for zlib.
A value of -1 denotes the default zlib compression level. Values
in the range 10-99 are divided by 10 and then used as the zlib
compression level. Higher compression levels correspond to greater
compression and small file sizes at the expense of more
computation.
|
