status bar to which such messages shall be directed.

it. All things that use texture prefilter must now accept data of any shape.

earlier. Texture types need to be explicitly enabled for non-shader GL
code.

min/max in the Image class. I am doing this in an attempt to eliminate
duplicate min/max calculations in the ImageTexture class, and to remove
the 'sampled min/max' bug, where the display/clipping ranges are set to
those of a sample, instead of those of the full image. Unfortunately,
load time for big images is now a necessity. Bugfix in Selection -
handling an empty selection.

display-space stuff for Model overlays. Bugfix to ModelOpts - using
incorrect property name.

do soon for Model.

panel. Initial state of toggle buttons was not being set correctly.

tensor modules to do.

works. GLVolume, GLLabel and GLModel ported. All other things broken,
probably.

information about declared variables (in a similar vein to parseGLSL),
and fillARBP replaces variable declarations with arb code.

arb_vf_program parsing changes temporarily, so stuff is not broken
anymore.

texture/param/attribute/varying locations. All the things are broken.

colour image texture to orient vectors.

DisplayOpts instance already has clip/modulate/colour images set.

vertex attribute divisors, as things get screwed otherwise.

so I'll keep this in.

for managing shader programs. GLVolume and GLLabel ported to use it,
everything else is broken.

Also fixed bug in glvolume_frag - clip value was not being inverted when
negative colour map in use.

hacky solution. Still don't know what's going on there, but it will work
until I get a diffusion image with a messed up qform/sform.

coloured by another image.

value of VectorOpts.clipImage, the glvolume or the glvector fragment
shader may be used. GLRGBVector updated to work with this new structure.
Other vector things are broken.