Commit: 4eafa4f26a1a82c20349d94830180dcbc06a7862
Author: Antonio Vazquez
Date:   Sat Jul 14 17:14:39 2018 +0200
Branches: greasepencil-object
https://developer.blender.org/rB4eafa4f26a1a82c20349d94830180dcbc06a7862

New property to verify if the material is grease pencil type

===================================================================

M       source/blender/makesrna/intern/rna_material.c

===================================================================

diff --git a/source/blender/makesrna/intern/rna_material.c 
b/source/blender/makesrna/intern/rna_material.c
index abc6dfcd3be..991ac042b3a 100644
--- a/source/blender/makesrna/intern/rna_material.c
+++ b/source/blender/makesrna/intern/rna_material.c
@@ -260,6 +260,15 @@ void rna_mtex_texture_slots_clear(ID *self_id, struct 
bContext *C, ReportList *r
        WM_event_add_notifier(C, NC_TEXTURE, CTX_data_scene(C));
 }
 
+static bool rna_is_grease_pencil_get(PointerRNA *ptr)
+{
+       Material *ma = (Material *)ptr->data;
+       if (ma->gp_style != NULL)
+               return true;
+
+       return false;
+}
+
 static void rna_gpcolordata_uv_update(Main *bmain, Scene *scene, PointerRNA 
*ptr)
 {
        /* update all uv strokes of this color */
@@ -721,6 +730,11 @@ void RNA_def_material(BlenderRNA *brna)
        RNA_def_property_pointer_sdna(prop, NULL, "gp_style");
        RNA_def_property_ui_text(prop, "Grease Pencil Settings", "Grease pencil 
color settings for material");
 
+       prop = RNA_def_property(srna, "is_grease_pencil", PROP_BOOLEAN, 
PROP_NONE);
+       RNA_def_property_boolean_funcs(prop, "rna_is_grease_pencil_get", NULL);
+       RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+       RNA_def_property_ui_text(prop, "Is Grease Pencil", "True if this 
material has grease pencil data");
+
        rna_def_material_greasepencil(brna);

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