Clay-Engine (merge clay-engine)

Initial work by Clément Foucault with contributions from Dalai Felinto
(mainly per-collection engine settings logic, and depsgraph iterator placeholder).

This makes Blender require OpenGL 3.3. Which means Intel graphic card
and OSX will break. Disable CLAY_ENGINE in CMake in those cases.

This is a prototype render engine intended to help the design of real
render engines. This is mainly an engine with enphasis in matcap and
ambient occlusion.

Implemented Features
--------------------

* Clay Render Engine, following the new API, to be used as reference for
future engines

* A more complete Matcap customization with more options

* Per-Collection render engine settings

* New Ground Truth AO - not enabled

Missing Features
----------------

* Finish object edit mode
  - Fix shaders to use new matrix
  - Fix artifacts when edge does off screen
  - Fix depth issue
  - Selection sillhouette
  - Mesh wires
  - Use mesh normals (for higher quality matcap)
  - Non-Mesh objects drawing
  - Widget drawing
  - Performance issues

* Finish mesh edit mode
  - Derived-Mesh-less edit mode API (mesh_rende.c)

* General edit mode
  - Per-collection edit mode settings

* General engines
  - Per-collection engine settings
    (they are their, but they still need to be flushed by depsgraph, and
    used by the drawing code)

1 files changed, 28 insertions, 12 deletions

diff --git a/source/blender/draw/CMakeLists.txt b/source/blender/draw/CMakeLists.txt
index 60449ebc600..d5b54e8a746 100644
--- a/source/blender/draw/CMakeLists.txt
+++ b/source/blender/draw/CMakeLists.txt
@@ -26,37 +26,53 @@
 set(INC
 	.
 	intern
-	nodes
-	operations
+	engines/clay
+
 	../blenkernel
 	../blenlib
 	../blentranslation
 	../imbuf
+	../depsgraph
 	../makesdna
 	../makesrna
-	../windowmanager
-	../nodes
-	../nodes/composite
-	../nodes/intern
+	../gpu
+	../editors/include
+	../editors/space_view3d
 	../render/extern/include
 	../render/intern/include
-	../../../extern/clew/include
+
+	../../../intern/glew-mx
 	../../../intern/guardedalloc
-	../../../intern/atomic
 )
 
 set(INC_SYS
-
+	${GLEW_INCLUDE_PATH}
 )
 
 set(SRC
-	DRW_defines.h
+	intern/draw_manager.c
+	intern/draw_mode_pass.c
+	intern/draw_cache.c
+	engines/clay/clay.c
 
-)
+	intern/DRW_render.h
+	intern/draw_mode_pass.h
+	intern/draw_cache.h
+	engines/clay/clay.h
 
-list(APPEND INC
+	./DRW_engine.h
 )
 
+if(WITH_CLAY_ENGINE)
+	add_definitions(-DWITH_CLAY_ENGINE)
 endif()
 
+data_to_c_simple(engines/clay/shaders/clay_frag.glsl SRC)
+data_to_c_simple(engines/clay/shaders/clay_vert.glsl SRC)
+data_to_c_simple(engines/clay/shaders/ssao_alchemy.glsl SRC)
+data_to_c_simple(engines/clay/shaders/ssao_groundtruth.glsl SRC)
+
+list(APPEND INC
+)
+
 blender_add_lib(bf_draw "${SRC}" "${INC}" "${INC_SYS}")