Ctr-Alt-F radial control operator for texture painting, controls the

rotation of the brush mask texture.

Unfortunately secondary path does not work here because we do not have a
permanent switch to choose between primary-secondary brush texture. Use
operator property instead.

source/blender/blenkernel/BKE_brush.h

@@ -76,10 +76,10 @@ float BKE_brush_sample_masktex(const Scene *scene, struct Brush *br, const float
                                const int thread, struct ImagePool *pool);
 
 /* texture */
-unsigned int *BKE_brush_gen_texture_cache(struct Brush *br, int half_side);
+unsigned int *BKE_brush_gen_texture_cache(struct Brush *br, int half_side, bool use_secondary);
 
 /* radial control */
-struct ImBuf *BKE_brush_gen_radial_control_imbuf(struct Brush *br);
+struct ImBuf *BKE_brush_gen_radial_control_imbuf(struct Brush *br, bool secondary);
 
 /* unified strength and size */
 

source/blender/blenkernel/intern/brush.c

@@ -970,10 +970,10 @@ float BKE_brush_curve_strength(Brush *br, float p, const float len)
 }
 
 /* TODO: should probably be unified with BrushPainter stuff? */
-unsigned int *BKE_brush_gen_texture_cache(Brush *br, int half_side)
+unsigned int *BKE_brush_gen_texture_cache(Brush *br, int half_side, bool use_secondary)
 {
 	unsigned int *texcache = NULL;
-	MTex *mtex = &br->mtex;
+	MTex *mtex = (use_secondary) ? &br->mask_mtex : &br->mtex;
 	TexResult texres = {0};
 	int hasrgb, ix, iy;
 	int side = half_side * 2;
@@ -1014,7 +1014,7 @@ unsigned int *BKE_brush_gen_texture_cache(Brush *br, int half_side)
 
 
 /**** Radial Control ****/
-struct ImBuf *BKE_brush_gen_radial_control_imbuf(Brush *br)
+struct ImBuf *BKE_brush_gen_radial_control_imbuf(Brush *br, bool secondary)
 {
 	ImBuf *im = MEM_callocN(sizeof(ImBuf), "radial control texture");
 	unsigned int *texcache;
@@ -1023,7 +1023,7 @@ struct ImBuf *BKE_brush_gen_radial_control_imbuf(Brush *br)
 	int i, j;
 
 	curvemapping_initialize(br->curve);
-	texcache = BKE_brush_gen_texture_cache(br, half);
+	texcache = BKE_brush_gen_texture_cache(br, half, secondary);
 	im->rect_float = MEM_callocN(sizeof(float) * side * side, "radial control rect");
 	im->x = im->y = side;
 

source/blender/editors/sculpt_paint/paint_ops.c

@@ -1011,7 +1011,8 @@ typedef enum {
 	RC_COLOR    = 1,
 	RC_ROTATION = 2,
 	RC_ZOOM     = 4,
-	RC_WEIGHT   = 8
+	RC_WEIGHT   = 8,
+	RC_SECONDARY_ROTATION = 16
 } RCFlags;
 
 static void set_brush_rc_path(PointerRNA *ptr, const char *brush_path,
@@ -1043,7 +1044,10 @@ static void set_brush_rc_props(PointerRNA *ptr, const char *paint,
 		RNA_string_set(ptr, "data_path_secondary", "");
 	}
 	set_brush_rc_path(ptr, brush_path, "color_path", "cursor_color_add");
-	set_brush_rc_path(ptr, brush_path, "rotation_path", "texture_slot.angle");
+	if (flags & RC_SECONDARY_ROTATION)
+		set_brush_rc_path(ptr, brush_path, "rotation_path", "mask_texture_slot.angle");
+	else
+		set_brush_rc_path(ptr, brush_path, "rotation_path", "texture_slot.angle");
 	RNA_string_set(ptr, "image_id", brush_path);
 
 	if (flags & RC_COLOR)
@@ -1055,6 +1059,11 @@ static void set_brush_rc_props(PointerRNA *ptr, const char *paint,
 	else
 		RNA_string_set(ptr, "zoom_path", "");
 
+	if (flags & RC_SECONDARY_ROTATION)
+		RNA_boolean_set(ptr, "secondary_tex", true);
+	else
+		RNA_boolean_set(ptr, "secondary_tex", false);
+
 	MEM_freeN(brush_path);
 }
 
@@ -1064,6 +1073,7 @@ static void ed_keymap_paint_brush_radial_control(wmKeyMap *keymap, const char *p
 	wmKeyMapItem *kmi;
 	/* only size needs to follow zoom, strength shows fixed size circle */
 	int flags_nozoom = flags & (~RC_ZOOM);
+	int flags_noradial_secondary = flags & (~(RC_SECONDARY_ROTATION | RC_ZOOM));
 
 	kmi = WM_keymap_add_item(keymap, "WM_OT_radial_control", FKEY, KM_PRESS, 0, 0);
 	set_brush_rc_props(kmi->ptr, paint, "size", "use_unified_size", flags);
@@ -1078,7 +1088,12 @@ static void ed_keymap_paint_brush_radial_control(wmKeyMap *keymap, const char *p
 
 	if (flags & RC_ROTATION) {
 		kmi = WM_keymap_add_item(keymap, "WM_OT_radial_control", FKEY, KM_PRESS, KM_CTRL, 0);
-		set_brush_rc_props(kmi->ptr, paint, "texture_slot.angle", NULL, flags_nozoom);
+		set_brush_rc_props(kmi->ptr, paint, "texture_slot.angle", NULL, flags_noradial_secondary);
+	}
+
+	if (flags & RC_SECONDARY_ROTATION) {
+		kmi = WM_keymap_add_item(keymap, "WM_OT_radial_control", FKEY, KM_PRESS, KM_CTRL | KM_ALT, 0);
+		set_brush_rc_props(kmi->ptr, paint, "mask_texture_slot.angle", NULL, flags_nozoom);
 	}
 }
 
@@ -1265,7 +1280,7 @@ void ED_keymap_paint(wmKeyConfig *keyconf)
 
 	ed_keymap_paint_brush_switch(keymap, "image_paint");
 	ed_keymap_paint_brush_size(keymap, "tool_settings.image_paint.brush.size");
-	ed_keymap_paint_brush_radial_control(keymap, "image_paint", RC_COLOR | RC_ZOOM | RC_ROTATION);
+	ed_keymap_paint_brush_radial_control(keymap, "image_paint", RC_COLOR | RC_ZOOM | RC_ROTATION | RC_SECONDARY_ROTATION);
 
 	ed_keymap_stencil(keymap);
 

source/blender/editors/sculpt_paint/sculpt.c

@@ -3427,7 +3427,7 @@ static void sculpt_update_tex(const Scene *scene, Sculpt *sd, SculptSession *ss)
 	/* Need to allocate a bigger buffer for bigger brush size */
 	ss->texcache_side = 2 * radius;
 	if (!ss->texcache || ss->texcache_side > ss->texcache_actual) {
-		ss->texcache = BKE_brush_gen_texture_cache(brush, radius);
+		ss->texcache = BKE_brush_gen_texture_cache(brush, radius, false);
 		ss->texcache_actual = ss->texcache_side;
 		ss->tex_pool = BKE_image_pool_new();
 	}

source/blender/windowmanager/intern/wm_operators.c

@@ -3391,6 +3391,7 @@ typedef struct {
 	int initial_mouse[2];
 	unsigned int gltex;
 	ListBase orig_paintcursors;
+	bool use_secondary_tex;
 	void *cursor;
 } RadialControl;
 
@@ -3434,7 +3435,7 @@ static void radial_control_set_tex(RadialControl *rc)
 
 	switch (RNA_type_to_ID_code(rc->image_id_ptr.type)) {
 		case ID_BR:
-			if ((ibuf = BKE_brush_gen_radial_control_imbuf(rc->image_id_ptr.data))) {
+			if ((ibuf = BKE_brush_gen_radial_control_imbuf(rc->image_id_ptr.data, rc->use_secondary_tex))) {
 				glGenTextures(1, &rc->gltex);
 				glBindTexture(GL_TEXTURE_2D, rc->gltex);
 				glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, ibuf->x, ibuf->y, 0,
@@ -3707,6 +3708,8 @@ static int radial_control_get_properties(bContext *C, wmOperator *op)
 		}
 	}
 
+	rc->use_secondary_tex = RNA_boolean_get(op->ptr, "secondary_tex");
+
 	return 1;
 }
 
@@ -3900,6 +3903,7 @@ static void WM_OT_radial_control(wmOperatorType *ot)
 	RNA_def_string(ot->srna, "fill_color_path", "", 0, "Fill Color Path", "Path of property used to set the fill color of the control");
 	RNA_def_string(ot->srna, "zoom_path", "", 0, "Zoom Path", "Path of property used to set the zoom level for the control");
 	RNA_def_string(ot->srna, "image_id", "", 0, "Image ID", "Path of ID that is used to generate an image for the control");
+	RNA_def_boolean(ot->srna, "secondary_tex", 0, "Secondary Texture", "Tweak brush secondary/mask texture");
 }
 
 /* ************************** timer for testing ***************** */