Sorry, three commits in one, became difficult to untangle..

Editors Modules

* render/ module added in editors, moved the preview render code there and
  also shading related operators.
* physics/ module made more consistent with other modules. renaming files,
  making a single physics_ops.c for operators and keymaps. Also move all
  particle related operators here now.
* space_buttons/ now should have only operators relevant to the buttons
  specificially.

Updates & Notifiers

* Material/Texture/World/Lamp can now be passed to DAG_id_flush_update,
  which will go back to a callback in editors. Eventually these should
  be in the depsgraph itself, but for now this gives a unified call for
  doing updates.
* GLSL materials are now refreshed on changes. There's still various
  cases missing, 
* Preview icons now hook into this system, solving various update cases
  that were missed before.
* Also fixes issue in my last commit, where some preview would not render,
  problem is avoided in the new system.

Icon Rendering

* On systems with support for non-power of two textures, an OpenGL texture
  is now used instead of glDrawPixels. This avoids problems with icons get
  clipped on region borders. On my Linux desktop, this gives an 1.1x speedup,
  and on my Mac laptop a 2.3x speedup overall in redrawing the full window,
  with the default setup. The glDrawPixels implementation on Mac seems to
  have a lot of overhread.
* Preview icons are now drawn using proper premul alpha, and never faded so
  you can see them clearly.
* Also tried to fix issue with texture node preview rendering, globals can't
  be used with threads reliably.

4 files changed, 28 insertions, 27 deletions

diff --git a/source/blender/editors/include/ED_particle.h b/source/blender/editors/include/ED_particle.h
index 28807caa255..a052142102d 100644
--- a/source/blender/editors/include/ED_particle.h
+++ b/source/blender/editors/include/ED_particle.h
@@ -38,6 +38,7 @@ struct RadialControl;
 struct rcti;
 struct wmWindowManager;
 struct PTCacheEdit;
+struct Scene;
 
 /* particle edit mode */
 void PE_free_ptcache_edit(struct PTCacheEdit *edit);
@@ -46,7 +47,7 @@ int PE_start_edit(struct PTCacheEdit *edit);
 /* access */
 struct PTCacheEdit *PE_get_current(struct Scene *scene, struct Object *ob);
 int PE_minmax(struct Scene *scene, float *min, float *max);
-struct ParticleEditSettings *PE_settings(Scene *scene);
+struct ParticleEditSettings *PE_settings(struct Scene *scene);
 
 /* update calls */
 void PE_hide_keys_time(struct Scene *scene, struct PTCacheEdit *edit, float cfra);
@@ -59,15 +60,11 @@ int PE_circle_select(struct bContext *C, int selecting, short *mval, float rad);
 int PE_lasso_select(struct bContext *C, short mcords[][2], short moves, short select);
 
 /* undo */
-void PE_undo_push(Scene *scene, char *str);
-void PE_undo_step(Scene *scene, int step);
-void PE_undo(Scene *scene);
-void PE_redo(Scene *scene);
-void PE_undo_menu(Scene *scene, Object *ob);
-
-/* operators */
-void ED_operatortypes_particle(void);
-void ED_keymap_particle(struct wmWindowManager *wm);
+void PE_undo_push(struct Scene *scene, char *str);
+void PE_undo_step(struct Scene *scene, int step);
+void PE_undo(struct Scene *scene);
+void PE_redo(struct Scene *scene);
+void PE_undo_menu(struct Scene *scene, struct Object *ob);
 
 #endif /* ED_PARTICLE_H */
 
diff --git a/source/blender/editors/include/ED_physics.h b/source/blender/editors/include/ED_physics.h
index 6ab804230d0..ee340c54e7d 100644
--- a/source/blender/editors/include/ED_physics.h
+++ b/source/blender/editors/include/ED_physics.h
@@ -31,11 +31,8 @@
 #define ED_PHYSICS_H
 
 /* operators */
-
-void ED_operatortypes_boids(void);
-void ED_operatortypes_pointcache(void);
-void ED_operatortypes_fluid(void);
-//void ED_keymap_pointcache(struct wmWindowManager *wm);
+void ED_operatortypes_physics(void);
+void ED_keymap_physics(struct wmWindowManager *wm);
 
 #endif /* ED_PHYSICS_H */
 
diff --git a/source/blender/editors/include/ED_previewrender.h b/source/blender/editors/include/ED_render.h
index b858a269236..be93bf92e5e 100644
--- a/source/blender/editors/include/ED_previewrender.h
+++ b/source/blender/editors/include/ED_render.h
@@ -21,22 +21,29 @@
  * ***** END GPL LICENSE BLOCK *****
  */
 
-#ifndef ED_PREVIEWRENDER_H
-#define ED_PREVIEWRENDER_H
+#ifndef ED_RENDER_H
+#define ED_RENDER_H
 
 #include "DNA_vec_types.h"
 
-struct View3D;
-struct SpaceButs;
-struct RenderInfo;
-struct Scene;
-struct Image;
-struct Render;
 struct bContext;
 struct ID;
+struct Main;
 struct MTex;
+struct Render;
+struct RenderInfo;
+
+/* render_ops.c */
+
+void ED_operatortypes_render(void);
+
+/* render_shading.c */
+
+void ED_render_id_flush_update(struct Main *bmain, struct ID *id);
+
+/* render_preview.c */
 
-#define PREVIEW_RENDERSIZE 140
+#define _RENDERSIZE 140
 
 /* stores rendered preview  - is also used for icons */
 typedef struct RenderInfo {
diff --git a/source/blender/editors/include/UI_interface_icons.h b/source/blender/editors/include/UI_interface_icons.h
index bf160b4ad68..afe6a2b9dcb 100644
--- a/source/blender/editors/include/UI_interface_icons.h
+++ b/source/blender/editors/include/UI_interface_icons.h
@@ -57,9 +57,9 @@ int UI_icon_get_height(int icon_id);
 void UI_icon_draw(float x, float y, int icon_id);
 void UI_icon_draw_preview(float x, float y, int icon_id, int nocreate);
 
-void UI_icon_draw_aspect(float x, float y, int icon_id, float aspect);
-void UI_icon_draw_aspect_blended(float x, float y, int icon_id, float aspect, int shade);
-void UI_icon_draw_size_blended(float x, float y, int size, int icon_id, int shade);
+void UI_icon_draw_aspect(float x, float y, int icon_id, float aspect, float alpha);
+void UI_icon_draw_aspect_color(float x, float y, int icon_id, float aspect, float *rgb);
+void UI_icon_draw_size(float x, float y, int size, int icon_id, float alpha);
 void UI_icons_free();
 void UI_icons_free_drawinfo(void *drawinfo);