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r2505 | helixhorned | 2012-03-20 11:32:16 -0700 (Tue, 20 Mar 2012) | 5 lines

Probably fix sheared PNG screenshots.

We shouldn't assume a particular bytes-per-line value and use ylookup[] instead.
Specifically, windowed modes on Windows use a frame buffer that always has odd
x dimension.
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r2504 | helixhorned | 2012-03-20 11:32:00 -0700 (Tue, 20 Mar 2012) | 1 line

Rename 'numpalookups' to 'numshades' internally.
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r2503 | helixhorned | 2012-03-20 11:31:37 -0700 (Tue, 20 Mar 2012) | 4 lines

Weirdness removal in G_LoadExtraPalettes (which reads lookup.dat).

- replace bit tweaking for big endian archs with clear code
- allow palette lookups >= 128, previously we read into a signed byte
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