PostScript: levels and types
Contents
PostScript import
The RedTitan PostScript engine interprets files conforming to Adobe 'level 2' specification and supports many popular 'level 3' features, such as:
Flate decompression
ReusableStreamDecode
Masked images
Rather than just paint the pages, 
EscapeE is able to flatten (and thus simplify) them, facilitating conversion to other formats or document modification.
PostScript export
Compressed files generated for (older) level 2 PostScript printers will work on the (newer) PostScript level 3 printers. These PostScript 3 printers accept more efficient methods of compression (e.g. Flate) than PostScript level 2 and so even smaller files may be generated, but these files may not be usable by PostScript level 2 printers.
The PostScript language encompasses the specification of fonts. There are several 'types' of PostScript fonts.
The original PostScript outline font. |
|
type 2 |
Type1 format updated to a more compact form. |
type 3 |
'User-defined' fonts – fonts sourced from documents. The characters in bitmapped fonts can be recognized as text, but those in vector drawn fonts cannot. |
type 4 |
Cartridge fonts: converted to OpenType in EscapeE. |
type 42 |
Converted to TrueType in EscapeE. |
type 0 |
These are fonts constructed from characters extracted from other fonts. A type 0 font may contain characters used in Western fonts (8-bit, e.g. Roman), Eastern fonts (larger, e.g. Chinese) or a mixture of the two. EscapeE works with the component fonts directly. |
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