What changed in EDuke32, build by build

Rename E_PostInitTables back to E_PostInit and move it back to where it belongs in engine.c (i.e. preinitengine, initengine, "postinitengine"). It should not have been changed.

Fix linking of mdpause variable with POLYMER=0 in screens.c, exposed by Visual Studio. DONT_BUILD.

Add #ifdef USE_OPENGL forgotten in r5024 that causes an OOB access in scansector() and glitchy mirrors with USE_OPENGL=0.

Extend undefinetile to also remove voxels, hightile (including skyboxes) and models.

Add vox_undefine().

Amend r5910 so that the problem is mitigated even when the map load takes place with a different renderer.

Clear wsprinfo[] upon map load. This should address some remaining instances of wall-ornamented sprite z-fighting.

GL .blend support.

In 8-bit, change the precedence of .alpha and .blend.

Remove the Polymer aspect ratio option, as it was always broken, and I don't know what purpose it has besides configuring non-square pixel stretching, which we have a long way to go in terms of configuring anyway.

Some float optimizations in the engine.

Fix ghost tsprite bug introduced in previous commit.

Finish what r5484 started but got reverted in r5723. Cstat 1024 now works properly in Polymost without causing any side effects in Classic. It remains unimplemented in Polymer.

Correct an oversight in r3580.

Revert part of r5481. We can't rely on the sprite trackers to tell us when tsprites change.

Fix the oversight in handling tspr->extra from r5400 by setting it to zero in polymer_scansprites.

A quick hack so that Mapster can load more pre-v7 PALETTE.DAT files.

Factor out the ETC block preparation by moving the ETC function decision from Polymost_SendTexToDriver into Polymost_PickETCFunction.

Allow compressed ART tiles (r_texcompr 2) to be cached.

Tweak the "don't upload textures with dimension > xdim" GL ES rule to limit to the power of two greater than xdim instead of less than it.

Clean up and rearrange some texcache code. No functional changes.

Call texcache_calcid once per texture instead of twice. Clean it up a little while we're at it.

Add "artquality" subtoken to textures, model skins, and skyboxes, which grants the texture HICR_ARTIMMUNITY. In effect, this implies "nodownsize" and signals that texture compression would be undesirable, but okay using r_texcompr mode 2 (aggressive).

Fix shading on ART tiles with fullbrights displayed without masking, such as on a whitewall.

Clean up texcache_enabled.

Add one-bit alpha detection for hightile and model skins.

Add r_texcompr 2, which compresses ART in addition to hightile.

Add HICR_ARTIMMUNITY and DAMETH_ARTIMMUNITY, which currently function identically to NOTEXCOMPRESS and NODOWNSIZE combined, and are only used when:

Move daskinloader into mdloadskin and clean up it and gloadtile_hi against one another.

Refactor all GL internal texture format decision making into uploadtexture().

Rename HICR_NOCOMPRESS to HICR_NODOWNSIZE, CACHEAD_NOCOMPRESS to CACHEAD_NODOWNSIZE, DAMETH_NOCOMPRESS to DAMETH_NODOWNSIZE, and HICR_NOSAVE to HICR_NOTEXCOMPRESS.

Introduce USE_GLEXT macro and use it to conditionally compile out all GL ARB function calls when compiling for GL ES platforms.

Fix POLYMER=0 warnings introduced in r5496.