[Poppler-bugs] [Bug 46556] [patch] pdftops git 23feb12 regression with -level1 bitmaps

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=46556

--- Comment #6 from thomasf <Thomas.Freitag at alfa.de> 2012-02-26 08:27:37 PST ---
(In reply to comment #4)
> Thomas,
> I think that Level 1 supports only gray, while Level 2 supports color, but
> there is also a "Level 1.5" middle ground with Level 1 plus a limited number of
> color operators that color printers used before Level 2 was adopted.  "pdftops
> -level1sep" generates only the "Level 1.5" color operators.  Software color
> separation usually supports only the simpler "Level 1.5" color operators.  That
> is why I need -level1sep to work, and to run quickly on large files.  ("large"
> is several hundred MB for a graphic the size of a broadsheet newspaper page
> with embedded high resolution color images, like an ad for a car dealer.)
> William

You're not completely true: already level 1 supports colors, but NOT for
images. When You say "Level 1.5" You probably mean the colorimage operator. So
i.e. text which should be printed in another colorspace than grayscale is
already possible in level 1, but would be converted to gray with poppler if
transparancy occurs on the page. The probably better way would be to use the
colorimage operator, which is introduced in "level 1.5", but nevertheless, this
would cause some work on level 1 which probably isn't use such often that we
should spend time on it!

Thomas

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