OpenGL anti-aliasing for 3D view, user selectable

Enables AA only for 3D view, and gives the user the option to turn it on/off (in system panel of user prefs)

release/scripts/ui/space_userpref.py

@@ -411,6 +411,7 @@ class USERPREF_PT_system(bpy.types.Panel):
         col.prop(system, "clip_alpha", slider=True)
         col.prop(system, "use_mipmaps")
         col.prop(system, "use_vbos")
+        col.prop(system, "use_antialiasing")
         col.label(text="Window Draw Method:")
         col.row().prop(system, "window_draw_method", expand=True)
         col.label(text="Textures:")

source/blender/editors/space_view3d/view3d_draw.c

@@ -2040,6 +2040,10 @@ void view3d_main_area_draw(const bContext *C, ARegion *ar)
 	Object *obact = OBACT;
 	char *grid_unit= NULL;
 	
+	/* enables anti-aliasing for 3D view drawing */
+	if (!(U.gameflags & USER_DISABLE_AA))
+		glEnable(GL_MULTISAMPLE_ARB);
+	
 	/* from now on all object derived meshes check this */
 	v3d->customdata_mask= get_viewedit_datamask(CTX_wm_screen(C), scene, obact);
 	
@@ -2222,6 +2226,10 @@ void view3d_main_area_draw(const bContext *C, ARegion *ar)
 	/* XXX here was the blockhandlers for floating panels */
 
 	v3d->flag |= V3D_INVALID_BACKBUF;
+	
+	/* Disable back anti-aliasing */
+	if (!(U.gameflags & USER_DISABLE_AA))
+		glDisable(GL_MULTISAMPLE_ARB);
 }
 
 

source/blender/makesdna/DNA_userdef_types.h

@@ -468,6 +468,7 @@ extern UserDef U; /* from blenkernel blender.c */
 #define USER_DISABLE_SOUND		2
 #define USER_DISABLE_MIPMAP		4
 #define USER_DISABLE_VBO		8
+#define USER_DISABLE_AA			16
 
 /* wm draw method */
 #define USER_DRAW_TRIPLE		0

source/blender/makesrna/intern/rna_userdef.c

@@ -2212,6 +2212,10 @@ static void rna_def_userdef_system(BlenderRNA *brna)
 	RNA_def_property_boolean_negative_sdna(prop, NULL, "gameflags", USER_DISABLE_VBO);
 	RNA_def_property_ui_text(prop, "VBOs", "Use Vertex Buffer Objects (or Vertex Arrays, if unsupported) for viewport rendering.");
 
+	prop= RNA_def_property(srna, "use_antialiasing", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_negative_sdna(prop, NULL, "gameflags", USER_DISABLE_AA);
+	RNA_def_property_ui_text(prop, "Anti-aliasing", "Use anti-aliasing for the 3D view (may impact redraw performance)");
+	
 	prop= RNA_def_property(srna, "gl_texture_limit", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_sdna(prop, NULL, "glreslimit");
 	RNA_def_property_enum_items(prop, gl_texture_clamp_items);

source/blender/windowmanager/intern/wm_window.c

@@ -313,7 +313,7 @@ static void wm_window_add_ghostwindow(wmWindowManager *wm, char *title, wmWindow
 								 inital_state, 
 								 GHOST_kDrawingContextTypeOpenGL,
 								 0 /* no stereo */,
-								 0 /* no AA */);
+								 4 /* 4x AA */);
 	
 	if (ghostwin) {