* Drawing code from wm_event_system.c split into separate wm_draw.c file.
Now there's 3 different draw methods implemented, not sure what survives
or will be added but is useful for debugging.
* Draw All: redraws everything each time, for reference.
* Draw Overlap All: what the code did before this commit, only draw
regions marked for redraw, and anything that overlaps them.
* Triple Buffer: copies/retores all area regions into a texture, and
blits that before drawing. Menus, brushes, gestures, etc are redrawn
always on top of that.
Currently "Draw Overlap All" is set hardcoded to be used still. Triple
Buffer code is not complete, it doesn't handle window resize yet. Cards
that don't support non power of two textures can need quite large
textures as well, this could be split into multiple smaller ones.
using linking together the precompiled library shader code and
material code and recompiling it all again for each material even
if it gives a performance hit, since the previous workaround only
worked on some driver versions still.
the features that are needed to run the game. Compile tested with
scons, make, but not cmake, that seems to have an issue not related
to these changes. The changes include:
* GLSL support in the viewport and game engine, enable in the game
menu in textured draw mode.
* Synced and merged part of the duplicated blender and gameengine/
gameplayer drawing code.
* Further refactoring of game engine drawing code, especially mesh
storage changed a lot.
* Optimizations in game engine armatures to avoid recomputations.
* A python function to get the framerate estimate in game.
* An option take object color into account in materials.
* An option to restrict shadow casters to a lamp's layers.
* Increase from 10 to 18 texture slots for materials, lamps, word.
An extra texture slot shows up once the last slot is used.
* Memory limit for undo, not enabled by default yet because it
needs the .B.blend to be changed.
* Multiple undo for image painting.
* An offset for dupligroups, so not all objects in a group have to
be at the origin.
