Grease Pencil: User-Pref for setting the default colour of newly created layers

release/scripts/startup/bl_ui/space_userpref.py

@@ -268,12 +268,16 @@ class USERPREF_PT_edit(Panel):
 
         col = row.column()
         col.label(text="Grease Pencil:")
+        col.prop(edit, "grease_pencil_eraser_radius", text="Eraser Radius")
+        col.separator()
         col.prop(edit, "grease_pencil_manhattan_distance", text="Manhattan Distance")
         col.prop(edit, "grease_pencil_euclidean_distance", text="Euclidean Distance")
-        col.prop(edit, "grease_pencil_eraser_radius", text="Eraser Radius")
+        col.separator()
         col.prop(edit, "use_grease_pencil_smooth_stroke", text="Smooth Stroke")
         col.prop(edit, "use_grease_pencil_simplify_stroke", text="Simplify Stroke")
         col.separator()
+        col.prop(edit, "grease_pencil_default_color", text="Default Color")
+        col.separator()
         col.separator()
         col.separator()
         col.label(text="Playback:")

source/blender/blenkernel/intern/gpencil.c

@@ -38,6 +38,7 @@
 
 #include "BLI_blenlib.h"
 #include "BLI_utildefines.h"
+#include "BLI_math_vector.h"
 
 #include "BLF_translation.h"
 
@@ -182,7 +183,7 @@ bGPDlayer *gpencil_layer_addnew(bGPdata *gpd, const char *name, int setactive)
 	BLI_addtail(&gpd->layers, gpl);
 	
 	/* set basic settings */
-	gpl->color[3] = 0.9f;
+	copy_v4_v4(gpl->color, U.gpencil_new_layer_col);
 	gpl->thickness = 3;
 	
 	/* auto-name */

source/blender/editors/interface/resources.c

@@ -1406,6 +1406,7 @@ void init_userdef_do_versions(void)
 	}
 	if (U.pad_rot_angle == 0)
 		U.pad_rot_angle = 15;
+	
 	/* graph editor - unselected F-Curve visibility */
 	if (U.fcu_inactive_alpha == 0) {
 		U.fcu_inactive_alpha = 0.25f;
@@ -2224,7 +2225,14 @@ void init_userdef_do_versions(void)
 			rgba_char_args_test_set(btheme->tima.uv_shadow, 112, 112, 112, 255);
 		}
 	}
-
+	
+	if (U.versionfile < 270) {
+		/* grease pencil - new layer color */
+		if (U.gpencil_new_layer_col[3] < 0.1f) {
+			/* defaults to black, but must at least be visible! */
+			U.gpencil_new_layer_col[3] = 0.9f;
+		}
+	}
 	
 	if (U.pixelsize == 0.0f)
 		U.pixelsize = 1.0f;

source/blender/makesdna/DNA_userdef_types.h

@@ -474,6 +474,7 @@ typedef struct UserDef {
 	struct ColorBand coba_weight;	/* from texture.h */
 
 	float sculpt_paint_overlay_col[3];
+	float gpencil_new_layer_col[3]; /* default color for newly created Grease Pencil layers */
 
 	short tweak_threshold;
 	short pad3;

source/blender/makesrna/intern/rna_userdef.c

@@ -3266,7 +3266,13 @@ static void rna_def_userdef_edit(BlenderRNA *brna)
 	RNA_def_property_int_sdna(prop, NULL, "gp_eraser");
 	RNA_def_property_range(prop, 0, 100);
 	RNA_def_property_ui_text(prop, "Grease Pencil Eraser Radius", "Radius of eraser 'brush'");
-
+	
+	
+	prop = RNA_def_property(srna, "grease_pencil_default_color", PROP_FLOAT, PROP_COLOR);
+	RNA_def_property_float_sdna(prop, NULL, "gpencil_new_layer_col");
+	RNA_def_property_array(prop, 4);
+	RNA_def_property_ui_text(prop, "Grease Pencil Default Color", "Color of new Grease Pencil layers");
+	
 	/* sculpt and paint */
 
 	prop = RNA_def_property(srna, "sculpt_paint_overlay_color", PROP_FLOAT, PROP_COLOR_GAMMA);