Remove Blender Internal and legacy viewport from Blender 2.8.

Brecht authored this commit, but he gave me the honours to actually
do it. Here it goes; Blender Internal. Bye bye, you did great!

* Point density, voxel data, ocean, environment map textures were removed,
  as these only worked within BI rendering. Note that the ocean modifier
  and the Cycles point density shader node continue to work.
* Dynamic paint using material shading was removed, as this only worked
  with BI. If we ever wanted to support this again probably it should go
  through the baking API.
* GPU shader export through the Python API was removed. This only worked
  for the old BI GLSL shaders, which no longer exists. Doing something
  similar for Eevee would be significantly more complicated because it
  uses a lot of multiplass rendering and logic outside the shader, it's
  probably impractical.
* Collada material import / export code is mostly gone, as it only worked
  for BI materials. We need to add Cycles / Eevee material support at some
  point.
* The mesh noise operator was removed since it only worked with BI
  material texture slots. A displacement modifier can be used instead.
* The delete texture paint slot operator was removed since it only worked
  for BI material texture slots. Could be added back with node support.

* Not all legacy viewport features are supported in the new viewport, but
  their code was removed. If we need to bring anything back we can look at
  older git revisions.
* There is some legacy viewport code that I could not remove yet, and some
  that I probably missed.
* Shader node execution code was left mostly intact, even though it is not
  used anywhere now. We may eventually use this to replace the texture
  nodes with Cycles / Eevee shader nodes.

* The Cycles Bake panel now includes settings for baking multires normal
  and displacement maps. The underlying code needs to be merged properly,
  and we plan to add back support for multires AO baking and add support
  to Cycles baking for features like vertex color, displacement, and other
  missing baking features.

* This commit removes DNA and the Python API for BI material, lamp, world
  and scene settings. This breaks a lot of addons.
* There is more DNA that can be removed or renamed, where Cycles or Eevee
  are reusing some old BI properties but the names are not really correct
  anymore.
* Texture slots for materials, lamps and world were removed. They remain
  for brushes, particles and freestyle linestyles.
* 'BLENDER_RENDER' remains in the COMPAT_ENGINES of UI panels. Cycles and
  other renderers use this to find all panels to show, minus a few panels
  that they have their own replacement for.

1 files changed, 6 insertions, 52 deletions

diff --git a/source/blender/blenkernel/intern/scene.c b/source/blender/blenkernel/intern/scene.c
index 51a4e8bfd66..27ebbad6660 100644
--- a/source/blender/blenkernel/intern/scene.c
+++ b/source/blender/blenkernel/intern/scene.c
@@ -111,7 +111,6 @@
 
 #include "bmesh.h"
 
-const char *RE_engine_id_BLENDER_RENDER = "BLENDER_RENDER";
 const char *RE_engine_id_BLENDER_CLAY = "BLENDER_CLAY";
 const char *RE_engine_id_BLENDER_EEVEE = "BLENDER_EEVEE";
 const char *RE_engine_id_BLENDER_WORKBENCH = "BLENDER_WORKBENCH";
@@ -554,7 +553,7 @@ void BKE_scene_init(Scene *sce)
 
 	sce->lay = sce->layact = 1;
 	
-	sce->r.mode = R_GAMMA | R_OSA | R_SHADOW | R_SSS | R_ENVMAP | R_RAYTRACE;
+	sce->r.mode = R_OSA;
 	sce->r.cfra = 1;
 	sce->r.sfra = 1;
 	sce->r.efra = 250;
@@ -565,8 +564,6 @@ void BKE_scene_init(Scene *sce)
 	sce->r.yasp = 1;
 	sce->r.tilex = 256;
 	sce->r.tiley = 256;
-	sce->r.mblur_samples = 1;
-	sce->r.filtertype = R_FILTER_MITCH;
 	sce->r.size = 50;
 
 	sce->r.im_format.planes = R_IMF_PLANES_RGBA;
@@ -582,8 +579,6 @@ void BKE_scene_init(Scene *sce)
 	sce->r.blurfac = 0.5;
 	sce->r.frs_sec = 24;
 	sce->r.frs_sec_base = 1;
-	sce->r.edgeint = 10;
-	sce->r.ocres = 128;
 
 	/* OCIO_TODO: for forwards compatibility only, so if no tonecurve are used,
 	 *            images would look in the same way as in current blender
@@ -592,18 +587,9 @@ void BKE_scene_init(Scene *sce)
 	 */
 	sce->r.color_mgt_flag |= R_COLOR_MANAGEMENT;
 
-	sce->r.gauss = 1.5f;
-	
-	/* deprecated but keep for upwards compat */
-	sce->r.postgamma = 1.0;
-	sce->r.posthue = 0.0;
-	sce->r.postsat = 1.0;
-
-	sce->r.bake_mode = 1;    /* prevent to include render stuff here */
+	sce->r.bake_mode = 0;
 	sce->r.bake_filter = 16;
-	sce->r.bake_osa = 5;
 	sce->r.bake_flag = R_BAKE_CLEAR;
-	sce->r.bake_normal_space = R_BAKE_SPACE_TANGENT;
 	sce->r.bake_samples = 256;
 	sce->r.bake_biasdist = 0.001;
 
@@ -631,7 +617,6 @@ void BKE_scene_init(Scene *sce)
 	sce->r.fg_stamp[3] = 1.0f;
 	sce->r.bg_stamp[0] = sce->r.bg_stamp[1] = sce->r.bg_stamp[2] = 0.0f;
 	sce->r.bg_stamp[3] = 0.25f;
-	sce->r.raytrace_options = R_RAYTRACE_USE_INSTANCES;
 
 	sce->r.seq_prev_type = OB_SOLID;
 	sce->r.seq_rend_type = OB_SOLID;
@@ -641,8 +626,6 @@ void BKE_scene_init(Scene *sce)
 
 	sce->r.simplify_subsurf = 6;
 	sce->r.simplify_particles = 1.0f;
-	sce->r.simplify_shadowsamples = 16;
-	sce->r.simplify_aosss = 1.0f;
 
 	sce->r.border.xmin = 0.0f;
 	sce->r.border.ymin = 0.0f;
@@ -1472,22 +1455,6 @@ int get_render_child_particle_number(const RenderData *r, int num, bool for_rend
 	}
 }
 
-int get_render_shadow_samples(const RenderData *r, int samples)
-{
-	if ((r->mode & R_SIMPLIFY) && samples > 0)
-		return min_ii(r->simplify_shadowsamples, samples);
-	else
-		return samples;
-}
-
-float get_render_aosss_error(const RenderData *r, float error)
-{
-	if (r->mode & R_SIMPLIFY)
-		return ((1.0f - r->simplify_aosss) * 10.0f + 1.0f) * error;
-	else
-		return error;
-}
-
 /**
   * Helper function for the SETLOOPER and SETLOOPER_VIEW_LAYER macros
   *
@@ -1525,39 +1492,26 @@ next_set:
 	return NULL;
 }
 
-bool BKE_scene_use_new_shading_nodes(const Scene *scene)
-{
-	const RenderEngineType *type = RE_engines_find(scene->r.engine);
-	return (type && type->flag & RE_USE_SHADING_NODES);
-}
-
 bool BKE_scene_use_shading_nodes_custom(Scene *scene)
 {
 	RenderEngineType *type = RE_engines_find(scene->r.engine);
 	return (type && type->flag & RE_USE_SHADING_NODES_CUSTOM);
 }
 
-bool BKE_scene_use_world_space_shading(Scene *scene)
-{
-	const RenderEngineType *type = RE_engines_find(scene->r.engine);
-	return ((scene->r.mode & R_USE_WS_SHADING) ||
-	        (type && (type->flag & RE_USE_SHADING_NODES)));
-}
-
 bool BKE_scene_use_spherical_stereo(Scene *scene)
 {
 	RenderEngineType *type = RE_engines_find(scene->r.engine);
 	return (type && type->flag & RE_USE_SPHERICAL_STEREO);
 }
 
-bool BKE_scene_uses_blender_internal(const Scene *scene)
+bool BKE_scene_uses_blender_eevee(const Scene *scene)
 {
-	return STREQ(scene->r.engine, RE_engine_id_BLENDER_RENDER);
+	return STREQ(scene->r.engine, RE_engine_id_BLENDER_EEVEE);
 }
 
-bool BKE_scene_uses_blender_eevee(const Scene *scene)
+bool BKE_scene_uses_cycles(const Scene *scene)
 {
-	return STREQ(scene->r.engine, RE_engine_id_BLENDER_EEVEE);
+	return STREQ(scene->r.engine, RE_engine_id_CYCLES);
 }
 
 void BKE_scene_base_flag_to_objects(ViewLayer *view_layer)