Overlay Engine: Refactor & Cleanup

This is the unification of all overlays into one overlay engine as described in T65347.

I went over all the code making it more future proof with less hacks and removing old / not relevent parts.

Goals / Acheivements:
- Remove internal shader usage (only drw shaders)
- Remove viewportSize and viewportSizeInv and put them in gloabl ubo
- Fixed some drawing issues: Missing probe option and Missing Alt+B clipping of some shader
- Remove old (legacy) shaders dependancy (not using view UBO).
- Less shader variation (less compilation time at first load and less patching needed for vulkan)
- removed some geom shaders when I could
- Remove static e_data (except shaders storage where it is OK)
- Clear the way to fix some anoying limitations (dithered transparency, background image compositing etc...)
- Wireframe drawing now uses the same batching capabilities as workbench & eevee (indirect drawing).
- Reduced complexity, removed ~3000 Lines of code in draw (also removed a lot of unused shader in GPU).
- Post AA to avoid complexity and cost of MSAA.

Remaining issues:
- ~~Armature edits, overlay toggles, (... others?) are not refreshing viewport after AA is complete~~
- FXAA is not the best for wires, maybe investigate SMAA
- Maybe do something more temporally stable for AA.
- ~~Paint overlays are not working with AA.~~
- ~~infront objects are difficult to select.~~
- ~~the infront wires sometimes goes through they solid counterpart (missing clear maybe?) (toggle overlays on-off when using infront+wireframe overlay in solid shading)~~

Note: I made some decision to change slightly the appearance of some objects to simplify their drawing. Namely the empty arrows end (which is now hollow/wire) and distance points of the cameras/spots being done by lines.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D6296

1 files changed, 0 insertions, 42 deletions

diff --git a/source/blender/draw/modes/draw_mode_engines.h b/source/blender/draw/modes/draw_mode_engines.h
deleted file mode 100644
index 0d3d5cf7c59..00000000000
--- a/source/blender/draw/modes/draw_mode_engines.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * Copyright 2016, Blender Foundation.
- */
-
-/** \file
- * \ingroup draw
- */
-
-#ifndef __DRAW_MODE_ENGINES_H__
-#define __DRAW_MODE_ENGINES_H__
-
-extern DrawEngineType draw_engine_object_type;
-extern DrawEngineType draw_engine_edit_armature_type;
-extern DrawEngineType draw_engine_edit_curve_type;
-extern DrawEngineType draw_engine_edit_lattice_type;
-extern DrawEngineType draw_engine_edit_mesh_type;
-extern DrawEngineType draw_engine_edit_metaball_type;
-extern DrawEngineType draw_engine_edit_text_type;
-extern DrawEngineType draw_engine_motion_path_type;
-extern DrawEngineType draw_engine_paint_texture_type;
-extern DrawEngineType draw_engine_paint_vertex_type;
-extern DrawEngineType draw_engine_particle_type;
-extern DrawEngineType draw_engine_pose_type;
-extern DrawEngineType draw_engine_sculpt_type;
-extern DrawEngineType draw_engine_overlay_type;
-extern DrawEngineType draw_engine_gpencil_type;
-
-#endif /* __DRAW_MODE_ENGINES_H__ */