From 828f54521301e42c1ff4ce791cb0caec3eb54d3f Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brechtvanlommel@gmail.com>
Date: Mon, 26 Feb 2018 16:46:48 +0100
Subject: Fix Cycles to mostly work with render layer / depsgraph changes.

Point density texture and motion blur are still broken, and many more changes
are needed in general to used evaluated datablocks.
---
 source/blender/makesrna/intern/rna_render.c        |  9 ++++--
 source/blender/render/extern/include/RE_engine.h   |  3 +-
 .../blender/render/intern/source/external_engine.c | 37 +++++++++++++++-------
 3 files changed, 34 insertions(+), 15 deletions(-)

(limited to 'source/blender')

diff --git a/source/blender/makesrna/intern/rna_render.c b/source/blender/makesrna/intern/rna_render.c
index 99567872103..6afcc73e16d 100644
--- a/source/blender/makesrna/intern/rna_render.c
+++ b/source/blender/makesrna/intern/rna_render.c
@@ -182,7 +182,7 @@ static void engine_render_to_image(RenderEngine *engine, Depsgraph *depsgraph)
 	RNA_parameter_list_free(&list);
 }
 
-static void engine_bake(RenderEngine *engine, struct Scene *scene,
+static void engine_bake(RenderEngine *engine, struct Depsgraph *depsgraph, struct Scene *scene,
                         struct Object *object, const int pass_type, const int pass_filter,
                         const int object_id, const struct BakePixel *pixel_array,
                         const int num_pixels, const int depth, void *result)
@@ -196,6 +196,7 @@ static void engine_bake(RenderEngine *engine, struct Scene *scene,
 	func = &rna_RenderEngine_bake_func;
 
 	RNA_parameter_list_create(&list, &ptr, func);
+	RNA_parameter_set_lookup(&list, "depsgraph", &depsgraph);
 	RNA_parameter_set_lookup(&list, "scene", &scene);
 	RNA_parameter_set_lookup(&list, "object", &object);
 	RNA_parameter_set_lookup(&list, "pass_type", &pass_type);
@@ -501,17 +502,19 @@ static void rna_def_render_engine(BlenderRNA *brna)
 	RNA_def_function_ui_description(func, "Export scene data for render");
 	RNA_def_function_flag(func, FUNC_REGISTER_OPTIONAL | FUNC_ALLOW_WRITE);
 	RNA_def_pointer(func, "data", "BlendData", "", "");
-	RNA_def_pointer(func, "depsgraph", "Depsgraph", "", "");
 	RNA_def_pointer(func, "scene", "Scene", "", "");
 
 	func = RNA_def_function(srna, "render_to_image", NULL);
 	RNA_def_function_ui_description(func, "Render scene into an image");
 	RNA_def_function_flag(func, FUNC_REGISTER_OPTIONAL | FUNC_ALLOW_WRITE);
-	RNA_def_pointer(func, "depsgraph", "Depsgraph", "", "");
+	parm = RNA_def_pointer(func, "depsgraph", "Depsgraph", "", "");
+	RNA_def_parameter_flags(parm, 0, PARM_REQUIRED);
 
 	func = RNA_def_function(srna, "bake", NULL);
 	RNA_def_function_ui_description(func, "Bake passes");
 	RNA_def_function_flag(func, FUNC_REGISTER_OPTIONAL | FUNC_ALLOW_WRITE);
+	parm = RNA_def_pointer(func, "depsgraph", "Depsgraph", "", "");
+	RNA_def_parameter_flags(parm, 0, PARM_REQUIRED);
 	parm = RNA_def_pointer(func, "scene", "Scene", "", "");
 	RNA_def_parameter_flags(parm, 0, PARM_REQUIRED);
 	parm = RNA_def_pointer(func, "object", "Object", "", "");
diff --git a/source/blender/render/extern/include/RE_engine.h b/source/blender/render/extern/include/RE_engine.h
index b1e5ff9890b..ad0cb34d382 100644
--- a/source/blender/render/extern/include/RE_engine.h
+++ b/source/blender/render/extern/include/RE_engine.h
@@ -94,7 +94,8 @@ typedef struct RenderEngineType {
 
 	void (*update)(struct RenderEngine *engine, struct Main *bmain, struct Scene *scene);
 	void (*render_to_image)(struct RenderEngine *engine, struct Depsgraph *depsgraph);
-	void (*bake)(struct RenderEngine *engine, struct Scene *scene, struct Object *object, const int pass_type,
+	void (*bake)(struct RenderEngine *engine, struct Depsgraph *depsgraph,
+	             struct Scene *scene, struct Object *object, const int pass_type,
 	             const int pass_filter, const int object_id, const struct BakePixel *pixel_array, const int num_pixels,
 	             const int depth, void *result);
 
diff --git a/source/blender/render/intern/source/external_engine.c b/source/blender/render/intern/source/external_engine.c
index 61ed19a1c9a..1b8ab4d8121 100644
--- a/source/blender/render/intern/source/external_engine.c
+++ b/source/blender/render/intern/source/external_engine.c
@@ -584,17 +584,32 @@ bool RE_bake_engine(
 		type->update(engine, re->main, re->scene);
 
 	if (type->bake) {
-		type->bake(
-		            engine,
-		            re->scene,
-		            object,
-		            pass_type,
-		            pass_filter,
-		            object_id,
-		            pixel_array,
-		            num_pixels,
-		            depth,
-		            result);
+		EvaluationContext *eval_ctx = DEG_evaluation_context_new(DAG_EVAL_RENDER);
+		Depsgraph *depsgraph = DEG_graph_new();
+		ViewLayer *view_layer = BLI_findlink(&re->scene->view_layers, re->scene->active_view_layer);
+
+		DEG_evaluation_context_init_from_view_layer_for_render(
+					eval_ctx,
+					depsgraph,
+					re->scene,
+					view_layer);
+
+		BKE_scene_graph_update_tagged(eval_ctx, depsgraph, re->main, re->scene, view_layer);
+
+		type->bake(engine,
+		           depsgraph,
+		           re->scene,
+		           object,
+		           pass_type,
+		           pass_filter,
+		           object_id,
+		           pixel_array,
+		           num_pixels,
+		           depth,
+		           result);
+
+		DEG_graph_free(depsgraph);
+		DEG_evaluation_context_free(eval_ctx);
 	}
 
 	engine->tile_x = 0;
-- 
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