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, 7 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_icons.h b/source/blender/blenkernel/BKE_icons.h
index 22897d2ea80..7a5262e0a14 100644
--- a/source/blender/blenkernel/BKE_icons.h
+++ b/source/blender/blenkernel/BKE_icons.h
@@ -43,7 +43,10 @@ enum {
 	ICON_DATA_PREVIEW,
 	/** 2D triangles: obj is #Icon_Geom */
 	ICON_DATA_GEOM,
+	/** Studiolight */
 	ICON_DATA_STUDIOLIGHT,
+	/** GPencil Layer color preview (annotations): obj is #bGPDlayer */
+	ICON_DATA_GPLAYER,
 };
 
 struct Icon {
@@ -79,6 +82,7 @@ struct ImBuf;
 struct PreviewImage;
 struct ID;
 struct StudioLight;
+struct bGPDlayer;
 
 enum eIconSizes;
 
@@ -87,6 +91,9 @@ void BKE_icons_init(int first_dyn_id);
 /* return icon id for library object or create new icon if not found */
 int BKE_icon_id_ensure(struct ID *id);
 
+/* return icon id for Grease Pencil layer (color preview) or create new icon if not found */
+int BKE_icon_gplayer_color_ensure(struct bGPDlayer *gpl);
+
 int BKE_icon_preview_ensure(struct ID *id, struct PreviewImage *preview);
 
 /* retrieve icon for id */