New Grease Pencil object for 2D animation

This commit merge the full development done in greasepencil-object branch and include mainly the following features.

- New grease pencil object.
- New drawing engine.
- New grease pencil modes Draw/Sculpt/Edit and Weight Paint.
- New brushes for grease pencil.
- New modifiers for grease pencil.
- New shaders FX.
- New material system (replace old palettes and colors).
- Split of annotations (old grease pencil) and new grease pencil object.
- UI adapted to blender 2.8.

You can get more info here:

https://code.blender.org/2017/12/drawing-2d-animation-in-blender-2-8/
https://code.blender.org/2018/07/grease-pencil-status-update/

This is the result of nearly two years of development and I want thanks firstly the other members of the grease pencil team: Daniel M. Lara, Matias Mendiola and Joshua Leung for their support, ideas and to keep working in the project all the time, without them this project had been impossible.

Also, I want thanks other Blender developers for their help, advices and to be there always to help me, and specially to Clément Foucault, Dalai Felinto, Pablo Vázquez and Campbell Barton.

1 files changed, 15 insertions, 27 deletions

diff --git a/source/blender/editors/object/object_edit.c b/source/blender/editors/object/object_edit.c
index a6c3c86922d..48048319cb7 100644
--- a/source/blender/editors/object/object_edit.c
+++ b/source/blender/editors/object/object_edit.c
@@ -100,6 +100,7 @@
 #include "ED_screen.h"
 #include "ED_undo.h"
 #include "ED_image.h"
+#include "ED_gpencil.h"
 
 #include "RNA_access.h"
 #include "RNA_define.h"
@@ -1539,7 +1540,6 @@ static const EnumPropertyItem *object_mode_set_itemsf(
 	const EnumPropertyItem *input = rna_enum_object_mode_items;
 	EnumPropertyItem *item = NULL;
 	Object *ob;
-	bGPdata *gpd;
 	int totitem = 0;
 
 	if (!C) /* needed for docs */
@@ -1555,7 +1555,9 @@ static const EnumPropertyItem *object_mode_set_itemsf(
 			    (input->value == OB_MODE_POSE && (ob->type == OB_ARMATURE)) ||
 			    (input->value == OB_MODE_PARTICLE_EDIT && use_mode_particle_edit) ||
 			    (ELEM(input->value, OB_MODE_SCULPT, OB_MODE_VERTEX_PAINT,
-			           OB_MODE_WEIGHT_PAINT, OB_MODE_TEXTURE_PAINT) && (ob->type == OB_MESH)) ||
+			          OB_MODE_WEIGHT_PAINT, OB_MODE_TEXTURE_PAINT) && (ob->type == OB_MESH)) ||
+			    (ELEM(input->value, OB_MODE_GPENCIL_EDIT, OB_MODE_GPENCIL_PAINT,
+			          OB_MODE_GPENCIL_SCULPT, OB_MODE_GPENCIL_WEIGHT) && (ob->type == OB_GPENCIL)) ||
 			    (input->value == OB_MODE_OBJECT))
 			{
 				RNA_enum_item_add(&item, &totitem, input);
@@ -1568,14 +1570,6 @@ static const EnumPropertyItem *object_mode_set_itemsf(
 		RNA_enum_items_add_value(&item, &totitem, input, OB_MODE_OBJECT);
 	}
 
-	/* On top of all the rest, GPencil Stroke Edit Mode
-	 * is available if there's a valid gp datablock...
-	 */
-	gpd = CTX_data_gpencil_data(C);
-	if (gpd) {
-		RNA_enum_items_add_value(&item, &totitem, rna_enum_object_mode_items, OB_MODE_GPENCIL);
-	}
-
 	RNA_enum_item_end(&item, &totitem);
 
 	*r_free = true;
@@ -1600,7 +1594,6 @@ static int object_mode_set_exec(bContext *C, wmOperator *op)
 {
 	bool use_submode = STREQ(op->idname, "OBJECT_OT_mode_set_or_submode");
 	Object *ob = CTX_data_active_object(C);
-	bGPdata *gpd = CTX_data_gpencil_data(C);
 	eObjectMode mode = RNA_enum_get(op->ptr, "mode");
 	eObjectMode restore_mode = (ob) ? ob->mode : OB_MODE_OBJECT;
 	const bool toggle = RNA_boolean_get(op->ptr, "toggle");
@@ -1620,22 +1613,9 @@ static int object_mode_set_exec(bContext *C, wmOperator *op)
 		}
 	}
 
-	if (gpd) {
-		/* GP Mode is not bound to a specific object. Therefore,
-		 * we don't want it to be actually saved on any objects,
-		 * as weirdness can happen if you select other objects,
-		 * or load old files.
-		 *
-		 * Instead, we use the following 2 rules to ensure that
-		 * the mode selector works as expected:
-		 *  1) If there's no object, we want to enter editmode.
-		 *     (i.e. with no object, we're in object mode)
-		 *  2) Otherwise, exit stroke editmode, so that we can
-		 *     enter another mode...
-		 */
-		if (!ob || (gpd->flag & GP_DATA_STROKE_EDITMODE)) {
-			WM_operator_name_call(C, "GPENCIL_OT_editmode_toggle", WM_OP_EXEC_REGION_WIN, NULL);
-		}
+	/* by default the operator assume is a mesh, but if gp object change mode */
+	if ((ob != NULL) && (ob->type == OB_GPENCIL) && (mode == OB_MODE_EDIT)) {
+		mode = OB_MODE_GPENCIL_EDIT;
 	}
 
 	if (!ob || !ED_object_mode_compat_test(ob, mode))
@@ -1666,6 +1646,14 @@ static int object_mode_set_exec(bContext *C, wmOperator *op)
 		}
 	}
 
+	/* if type is OB_GPENCIL, set cursor mode */
+	if ((ob) && (ob->type == OB_GPENCIL)) {
+		if (ob->data) {
+			bGPdata *gpd = (bGPdata *)ob->data;
+			ED_gpencil_setup_modes(C, gpd, ob->mode);
+		}
+	}
+
 	return OPERATOR_FINISHED;
 }