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.

1 files changed, 38 insertions, 2 deletions

diff --git a/source/blender/makesrna/intern/rna_brush.c b/source/blender/makesrna/intern/rna_brush.c
index 15125795e01..d5195110314 100644
--- a/source/blender/makesrna/intern/rna_brush.c
+++ b/source/blender/makesrna/intern/rna_brush.c
@@ -51,6 +51,9 @@ EnumPropertyItem brush_sculpt_tool_items[] = {
 
 #include "BKE_texture.h"
 
+#include "WM_api.h"
+#include "WM_types.h"
+
 static void rna_Brush_mtex_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
 {
 	Brush *brush= (Brush*)ptr->data;
@@ -87,6 +90,12 @@ static void rna_Brush_active_texture_set(PointerRNA *ptr, PointerRNA value)
 	}
 }
 
+static void rna_Brush_update(bContext *C, PointerRNA *ptr)
+{
+	Brush *br= (Brush*)ptr->data;
+	WM_event_add_notifier(C, NC_BRUSH|NA_EDITED, br);
+}
+
 #else
 
 static void rna_def_brush(BlenderRNA *brna)
@@ -118,130 +127,157 @@ static void rna_def_brush(BlenderRNA *brna)
 	prop= RNA_def_property(srna, "blend", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_items(prop, prop_blend_items);
 	RNA_def_property_ui_text(prop, "Blending mode", "Brush blending mode.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "sculpt_tool", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_items(prop, brush_sculpt_tool_items);
 	RNA_def_property_ui_text(prop, "Sculpt Tool", "");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "direction", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_bitflag_sdna(prop, NULL, "flag");
 	RNA_def_property_enum_items(prop, prop_flip_direction_items);
 	RNA_def_property_ui_text(prop, "Direction", "Mapping type to use for this image in the game engine.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	/* number values */
 	prop= RNA_def_property(srna, "size", PROP_INT, PROP_NONE);
 	RNA_def_property_range(prop, 1, 200);
 	RNA_def_property_ui_text(prop, "Size", "Diameter of the brush.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "jitter", PROP_FLOAT, PROP_NONE);
 	RNA_def_property_float_sdna(prop, NULL, "jitter");
 	RNA_def_property_range(prop, 0.0f, 1.0f);
 	RNA_def_property_ui_text(prop, "Jitter", "Jitter the position of the brush while painting.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "spacing", PROP_FLOAT, PROP_NONE);
 	RNA_def_property_float_sdna(prop, NULL, "spacing");
 	RNA_def_property_range(prop, 1.0f, 100.0f);
 	RNA_def_property_ui_text(prop, "Spacing", "Spacing between brush stamps.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "smooth_stroke_radius", PROP_INT, PROP_NONE);
 	RNA_def_property_range(prop, 10, 200);
 	RNA_def_property_ui_text(prop, "Smooth Stroke Radius", "Minimum distance from last point before stroke continues.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "smooth_stroke_factor", PROP_FLOAT, PROP_NONE);
 	RNA_def_property_range(prop, 0.5, 0.99);
 	RNA_def_property_ui_text(prop, "Smooth Stroke Factor", "Higher values give a smoother stroke.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "rate", PROP_FLOAT, PROP_NONE);
 	RNA_def_property_float_sdna(prop, NULL, "rate");
 	RNA_def_property_range(prop, 0.010f, 1.0f);
 	RNA_def_property_ui_text(prop, "Rate", "Number of paints per second for Airbrush.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "color", PROP_FLOAT, PROP_COLOR);
 	RNA_def_property_float_sdna(prop, NULL, "rgb");
 	RNA_def_property_ui_text(prop, "Color", "");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "strength", PROP_FLOAT, PROP_NONE);
 	RNA_def_property_float_sdna(prop, NULL, "alpha");
 	RNA_def_property_range(prop, 0.0f, 1.0f);
 	RNA_def_property_ui_text(prop, "Strength", "The amount of pressure on the brush.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	/* flag */
 	prop= RNA_def_property(srna, "use_airbrush", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_AIRBRUSH);
 	RNA_def_property_ui_text(prop, "Airbrush", "Keep applying paint effect while holding mouse (spray).");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "use_wrap", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_TORUS);
 	RNA_def_property_ui_text(prop, "Wrap", "Enable torus wrapping while painting.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "use_strength_pressure", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_ALPHA_PRESSURE);
 	RNA_def_property_ui_icon(prop, ICON_STYLUS_PRESSURE, 0);
 	RNA_def_property_ui_text(prop, "Strength Pressure", "Enable tablet pressure sensitivity for strength.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "use_size_pressure", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_SIZE_PRESSURE);
 	RNA_def_property_ui_icon(prop, ICON_STYLUS_PRESSURE, 0);
 	RNA_def_property_ui_text(prop, "Size Pressure", "Enable tablet pressure sensitivity for size.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "use_jitter_pressure", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_JITTER_PRESSURE);
 	RNA_def_property_ui_icon(prop, ICON_STYLUS_PRESSURE, 0);
 	RNA_def_property_ui_text(prop, "Jitter Pressure", "Enable tablet pressure sensitivity for jitter.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "use_spacing_pressure", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_SPACING_PRESSURE);
 	RNA_def_property_ui_icon(prop, ICON_STYLUS_PRESSURE, 0);
 	RNA_def_property_ui_text(prop, "Spacing Pressure", "Enable tablet pressure sensitivity for spacing.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "use_rake", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_RAKE);
 	RNA_def_property_ui_text(prop, "Rake", "Rotate the brush texture to match the stroke direction.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "use_anchor", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_ANCHORED);
 	RNA_def_property_ui_text(prop, "Anchored", "Keep the brush anchored to the initial location.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "use_space", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_SPACE);
 	RNA_def_property_ui_text(prop, "Space", "Limit brush application to the distance specified by spacing.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "use_smooth_stroke", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_SMOOTH_STROKE);
 	RNA_def_property_ui_text(prop, "Smooth Stroke", "Brush lags behind mouse and follows a smoother path.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "use_persistent", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_PERSISTENT);
 	RNA_def_property_ui_text(prop, "Persistent", "Sculpts on a persistent layer of the mesh.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	/* not exposed in the interface yet
 	prop= RNA_def_property(srna, "fixed_tex", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", BRUSH_FIXED_TEX);
-	RNA_def_property_ui_text(prop, "Fixed Texture", "Keep texture origin in fixed position.");*/
+	RNA_def_property_ui_text(prop, "Fixed Texture", "Keep texture origin in fixed position.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update"); */
 
 	prop= RNA_def_property(srna, "curve", PROP_POINTER, PROP_NONE);
 	RNA_def_property_flag(prop, PROP_NEVER_NULL);
 	RNA_def_property_ui_text(prop, "Curve", "Editable falloff curve.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	/* texture */
 	rna_def_mtex_common(srna, "rna_Brush_mtex_begin", "rna_Brush_active_texture_get",
-		"rna_Brush_active_texture_set", "TextureSlot");
+		"rna_Brush_active_texture_set", "TextureSlot", "rna_Brush_update");
 
 	/* clone tool */
 	prop= RNA_def_property(srna, "clone_image", PROP_POINTER, PROP_NONE);
 	RNA_def_property_pointer_sdna(prop, NULL, "clone.image");
 	RNA_def_property_flag(prop, PROP_EDITABLE);
 	RNA_def_property_ui_text(prop, "Clone Image", "Image for clone tool.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 	
 	prop= RNA_def_property(srna, "clone_opacity", PROP_FLOAT, PROP_NONE);
 	RNA_def_property_float_sdna(prop, NULL, "clone.alpha");
 	RNA_def_property_range(prop, 0.0f, 1.0f);
 	RNA_def_property_ui_text(prop, "Clone Opacity", "Opacity of clone image display.");
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 
 	prop= RNA_def_property(srna, "clone_offset", PROP_FLOAT, PROP_XYZ);
 	RNA_def_property_float_sdna(prop, NULL, "clone.offset");
 	RNA_def_property_ui_text(prop, "Clone Offset", "");
 	RNA_def_property_ui_range(prop, -1.0f , 1.0f, 10.0f, 3);
+	RNA_def_property_update(prop, 0, "rna_Brush_update");
 }