FSO doesn't appear to use this any longer. And even when it was enabled the
requirements made it largely useless anyway. Removing to clean up cfile a
bit and so we don't have to keep maintaining it.
Adds bcdec lib to convert compressed DDS textures to RGBA based on what the
system supports. BC7 if BPTC extension not supported, DXT? if S3TC extension
not supported.
Should support cubemaps and volume textures but those were not tested.
Addtional changes:
- remove indexed DDS support since it had bugs but didn't work anyway
(R8 should be used instead)
- fix issues with volume textures (nothing to test with)
- remove old compression support flags as they are now obsolete
Fixes#4920
newer OpenGL extension support
add GL_ARB_texture_rectangle support for non-power-of-2 textures as interface graphics
add cubemap reading and writing support to DDS loader
fix bug in DDS loader that made compressed images with mipmaps use more memory than they really required
add support for a default envmap named "cubemap.dds"
new mission flag "$Environment Map:" to use a pre-existing envmap
minor cleanup of compiler warning messages
get rid of wasteful math from gr_set_proj_matrix()
remove extra gr_set_*_matrix() calls from starfield.cpp as there was no longer a reason for them to be there
clean up bmpman flags in reguards to cubemaps and render targets
disable D3D envmap code until it can be upgraded to current level of code
remove bumpmap code from OpenGL stuff (sorry but it was getting in the way, if it was more than copy-paste it would be worth keeping)
replace gluPerspective() call with glFrustum() call, it's a lot less math this way and saves the extra function call
clean up some DDS error messages and other minor bug/comment fixes
move bitmap stuff from pstypes.h, it makes more sense here anyway
start of 8-bit palette conversion, needs work but is here for WMCoolmon to look at and play with
- use VM_* macros for bmpman since it didn't seem to register the memory correctly (temporary)
- a little "stupid" fix for dds bitmap reading
- fix it so that memory is released properly on bitmap read errors
- some cleanup to model texture loading
- allow model textures to get released rather than just unloaded, saves bitmap slots
- bump MAX_BITMAPS to 4750, should be able to decrease after public testing of new code
Taylor Richards