Changes to Brush texture workflow

This changes how textures are accessed from Brushes, with the intention of simplifying 
the workflow, and reducing the amount of clicking. Rather than the previous texture slots 
(which didn't work as a stack anyway), brushes now have a single texture linked. Rather 
than taking time having to set up your slots in advance, you can now select and change 
textures directly as you sculpt/paint on the fly. For complex brushes, node textures can 
be used, or for fast access, it's easy to make a duplicate of your brush with the texture 
you like and assign a hotkey.

Brush textures can now be chosen from a new Textures panel in the brush tool 
properties - click on the thumbnail to open a texture selector. This is done using a new 
variation on the ID template - the number of rows and columns to display in the popup 
can be customised in the UI scripts.

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index 88b9c7819fd..56157386d4b 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -3171,9 +3171,10 @@ uiBut *uiDefHotKeyevtButS(uiBlock *block, int retval, char *str, short x1, short
 
 
 /* arg is pointer to string/name, use uiButSetSearchFunc() below to make this work */
-uiBut *uiDefSearchBut(uiBlock *block, void *arg, int retval, int icon, int maxlen, short x1, short y1, short x2, short y2, char *tip)
+/* here a1 and a2, if set, control thumbnail preview rows/cols */
+uiBut *uiDefSearchBut(uiBlock *block, void *arg, int retval, int icon, int maxlen, short x1, short y1, short x2, short y2, float a1, float a2, char *tip)
 {
-	uiBut *but= ui_def_but(block, SEARCH_MENU, retval, "", x1, y1, x2, y2, arg, 0.0, maxlen, 0.0, 0.0, tip);
+	uiBut *but= ui_def_but(block, SEARCH_MENU, retval, "", x1, y1, x2, y2, arg, 0.0, maxlen, a1, a2, tip);
 	
 	but->icon= (BIFIconID) icon;
 	but->flag|= UI_HAS_ICON;