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Support 8-bit & 12-bit JPEGs using the same build

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Partially implements #199

This commit also implements a request from #178 (the ability to compile
the libjpeg example as a standalone program.)
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DRC
2022-03-08 12:34:11 -06:00
parent fc562d11f0
commit 7fec5074f9
82 changed files with 3800 additions and 676 deletions
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structure.txt
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@@ -57,10 +57,7 @@ Within these limits, any set of compression parameters allowed by the JPEG
spec should be readable for decompression. (We can be more restrictive about
what formats we can generate.) Although the system design allows for all
parameter values, some uncommon settings are not yet implemented and may
never be; nonintegral sampling ratios are the prime example. Furthermore,
we treat 8-bit vs. 12-bit data precision as a compile-time switch, not a
run-time option, because most machines can store 8-bit pixels much more
compactly than 12-bit.
never be; nonintegral sampling ratios are the prime example.
By itself, the library handles only interchange JPEG datastreams --- in
particular the widely used JFIF file format. The library can be used by