[Bf-python] Image loading in GL memory

[Willian Padovani Germano]

Campbell Barton wrote:

> If they are not loaded in the texture view (Alt+Z)
> then the bindcode returned is 0-

Ah ok, thanks.  I took a look at the red book and Blender sources.

Seems what is needed is the texels pointer: image->ibuf->rect, which can 
then be passed to the glTexImage2D function, for example.  My concern 
was how to manage this storage (free it) and in drawmesh.c there's this 
function: void free_all_realtime_images(void), that can be the simplest 
solution to what is needed.

So that's it (names can be changed, of course):

1) add image.getTexelsPtr() method in Blender.Image's BPy_Image object 
-- Python supports pointer types, so we can wrap  / unwrap the pointer 
without casting it to a long int or something.

2) add Blender.Image.FreeAllTextures() function, a wrapper or clone for 
free_all_realtime_images().  If this doesn't crash Blender because we 
deleted its textures (aka if Blender already has code to see that and 
regenerate them), it's all done.  Otherwise we will have to generate 
Blender's own realtime images again inside this function or use some 
other method, maybe leaving cleanup for the script itself.

What do you think?

BTW (unrelated to adding the new functionality), just a foolish 
suggestion: did you consider a 3d thumbnailer in the 3d view?  Like a 
fancy "rack" of embedded 3d screens for the thumbnails, with buttons for 
previous/next page and for selecting?  It should already be possible to 
do this with bpython -- and is possible with the game engine, though 
maybe we need to add a function to Blender.Window to set draw mode for 
individual 3d views.

-- 
Willian