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, 78 deletions

diff --git a/source/blender/makesdna/DNA_world_types.h b/source/blender/makesdna/DNA_world_types.h
index f30ffa84b73..ac93033609d 100644
--- a/source/blender/makesdna/DNA_world_types.h
+++ b/source/blender/makesdna/DNA_world_types.h
@@ -56,8 +56,6 @@ typedef struct World {
 	short texact, mistype;
 
 	float horr, horg, horb;
-	float zenr, zeng, zenb;
-	float ambr, ambg, ambb;
 
 	/**
 	 * Exposure= mult factor. unused now, but maybe back later. Kept in to be upward compat.
@@ -67,42 +65,22 @@ typedef struct World {
 	float exposure, exp, range;
 	float linfac, logfac;
 	
-	short skytype;
 	/**
 	 * Some world modes
 	 * bit 0: Do mist
-	 * bit 1: Do stars
-	 * bit 2: (reserved) depth of field
-	 * bit 3: (gameengine): Activity culling is enabled.
-	 * bit 4: ambient occlusion
-	 * bit 5: (gameengine) : enable Bullet DBVT tree for view frustum culling 
 	 */
 	short mode;												// partially moved to scene->gamedata in 2.5
-	short pad2[2];
+	short pad2[3];
 
 	float misi, miststa, mistdist, misthi;
 
-	/* unused now: DOF */
-	short dofsta, dofend, dofmin, dofmax;
-	
 	/* ambient occlusion */
-	float aodist, aodistfac, aoenergy, aobias;
-	short aomode, aosamp, aomix, aocolor;
-	float ao_adapt_thresh, ao_adapt_speed_fac;
-	float ao_approx_error, ao_approx_correction;
-	float ao_indirect_energy, ao_env_energy, ao_pad2;
-	short ao_indirect_bounces, ao_pad;
-	short ao_samp_method, ao_gather_method, ao_approx_passes;
-	
-	/* assorted settings (in the middle of ambient occlusion settings for padding reasons) */
-	short flag;
-	
-	/* ambient occlusion (contd...) */
-	float *aosphere, *aotables;
+	float aodist, aoenergy;
 	
+	/* assorted settings  */
+	short flag, pad3[3];
 	
 	struct Ipo *ipo  DNA_DEPRECATED;  /* old animation system, deprecated for 2.5 */
-	struct MTex *mtex[18];		/* MAX_MTEX */
 	short pr_texture, use_nodes, pad;
 	short update_flag;          /* XXX temporary flag waiting for depsgraph proper tagging */
 
@@ -118,33 +96,15 @@ typedef struct World {
 
 /* **************** WORLD ********************* */
 
-/* skytype */
-#define WO_SKYBLEND		1
-#define WO_SKYREAL		2
-#define WO_SKYPAPER		4
-/* while render: */
-#define WO_SKYTEX		8
-#define WO_ZENUP		16
-
 /* mode */
 #define WO_MIST	               1
 //#define WO_STARS               2 /* deprecated */
 /*#define WO_DOF                 4*/
 //#define WO_ACTIVITY_CULLING	   8 /* deprecated */
-#define WO_ENV_LIGHT   		  16
+//#define WO_ENV_LIGHT   		  16
 //#define WO_DBVT_CULLING		  32 /* deprecated */
 #define WO_AMB_OCC   		  64
-#define WO_INDIRECT_LIGHT	  128
-
-/* aomix */
-enum {
-	WO_AOADD    = 0,
-#ifdef DNA_DEPRECATED
-	WO_AOSUB    = 1,  /* deprecated */
-	WO_AOADDSUB = 2,  /* deprecated */
-#endif
-	WO_AOMUL    = 3,
-};
+//#define WO_INDIRECT_LIGHT	  128
 
 enum {
 	WO_MIST_QUADRATIC          = 0,
@@ -152,38 +112,6 @@ enum {
 	WO_MIST_INVERSE_QUADRATIC  = 2,
 };
 
-/* ao_samp_method - methods for sampling the AO hemi */
-#define WO_AOSAMP_CONSTANT			0
-#define WO_AOSAMP_HALTON			1
-#define WO_AOSAMP_HAMMERSLEY		2
-
-/* aomode (use distances & random sampling modes) */
-#define WO_AODIST		1
-#define WO_AORNDSMP		2
-#define WO_AOCACHE		4
-
-/* aocolor */
-#define WO_AOPLAIN	0
-#define WO_AOSKYCOL	1
-#define WO_AOSKYTEX	2
-
-/* ao_gather_method */
-#define WO_AOGATHER_RAYTRACE	0
-#define WO_AOGATHER_APPROX		1
-
-/* texco (also in DNA_material_types.h) */
-#define TEXCO_ANGMAP	64
-#define TEXCO_H_SPHEREMAP	256
-#define TEXCO_H_TUBEMAP	1024
-#define TEXCO_EQUIRECTMAP 2048
-
-/* mapto */
-#define WOMAP_BLEND		1
-#define WOMAP_HORIZ		2
-#define WOMAP_ZENUP		4
-#define WOMAP_ZENDOWN	8
-// #define WOMAP_MIST		16 /* Deprecated */
-
 /* flag */
 #define WO_DS_EXPAND	(1<<0)
 	/* NOTE: this must have the same value as MA_DS_SHOW_TEXS,