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, 23 insertions, 279 deletions

diff --git a/source/blender/makesdna/DNA_material_types.h b/source/blender/makesdna/DNA_material_types.h
index b6f74c7e6f7..564e6aee3fc 100644
--- a/source/blender/makesdna/DNA_material_types.h
+++ b/source/blender/makesdna/DNA_material_types.h
@@ -40,45 +40,17 @@
 #define MAX_MTEX	18
 #endif
 
-struct MTex;
 struct Image;
-struct ColorBand;
-struct Group;
 struct bNodeTree;
 struct AnimData;
 struct Ipo;
 
 /* WATCH IT: change type? also make changes in ipo.h  */
 
-typedef struct VolumeSettings {
-	float density;
-	float emission;
-	float scattering;
-	float reflection;
-
-	float emission_col[3];
-	float transmission_col[3];
-	float reflection_col[3];
-
-	float density_scale;
-	float depth_cutoff;
-	float asymmetry;
-	
-	short stepsize_type;
-	short shadeflag;
-	short shade_type;
-	short precache_resolution;
-
-	float stepsize;
-	float ms_diff;
-	float ms_intensity;
-	float ms_spread;
-} VolumeSettings;
-
 typedef struct TexPaintSlot {
 	struct Image *ima; /* image to be painted on */
 	char *uvname;      /* customdata index for uv layer, MAX_NAME*/
-	int index;         /* index for mtex slot in material for blender internal */
+	int valid;         /* do we have a valid image and UV map */
 	int pad;
 } TexPaintSlot;
 
@@ -96,127 +68,49 @@ typedef struct Material {
 	ID id;
 	struct AnimData *adt;	/* animation data (must be immediately after id for utilities to use it) */ 
 	
-	short material_type, flag;
-	/* note, keep this below synced with render_types.h */
+	short flag, pad1[7];
+
+	/* Colors from Blender Internal that we are still using. */
 	float r, g, b;
 	float specr, specg, specb;
-	float mirr, mirg, mirb;
-	float ambr, ambb, ambg;
-	float amb, emit, ang, spectra, ray_mirror;
-	float alpha, ref, spec, zoffs, add;
-	float translucency;
-	/* end synced with render_types.h */
-	
-	struct VolumeSettings vol;
-
-	float fresnel_mir, fresnel_mir_i;
-	float fresnel_tra, fresnel_tra_i;
-	float filter;		/* filter added, for raytrace transparency and transmissivity */
-	float tx_limit, tx_falloff;
-	short ray_depth, ray_depth_tra;
-	short har;
-	char seed1, seed2;
-	
-	float gloss_mir, gloss_tra;
-	short samp_gloss_mir, samp_gloss_tra;
-	float adapt_thresh_mir, adapt_thresh_tra;
-	float aniso_gloss_mir;
-	float dist_mir;
-	short fadeto_mir;
-	short shade_flag;		/* like Cubic interpolation */
-		
-	int mode, mode_l;		/* mode_l is the or-ed result of all layer modes */
-	int mode2, mode2_l;		/* additional mode flags */
-	short flarec, starc, linec, ringc;
-	float hasize, flaresize, subsize, flareboost;
-	float strand_sta, strand_end, strand_ease, strand_surfnor;
-	float strand_min, strand_widthfade;
-	char strand_uvname[64];	/* MAX_CUSTOMDATA_LAYER_NAME */
-	
-	float sbias;			/* shadow bias to prevent terminator prob */
-	float lbias;			/* factor to multiply lampbias with (0.0 = no mult) */
-	float shad_alpha;		/* in use for irregular shadowbuffer */
-	int	septex;
-	
-	/* for buttons and render*/
-	char rgbsel, texact, pr_type, use_nodes;
-	short pr_lamp, pr_texture, ml_flag;	/* ml_flag is for disable base material */
-	
-	/* mapping */
-	char mapflag, pad;
-
-	/* shaders */
-	short diff_shader, spec_shader;
-	float roughness, refrac;
-	/* XXX param[4] needs review and improvement (shader system as whole anyway)
-	 * This is nasty reused variable for different goals and not easy to RNAify nicely. -jesterKing */
-	float param[4];		/* size, smooth, size, smooth, for toonshader, 0 (fac) and 1 (fresnel) also for fresnel shader */
-	float rms;
-	float darkness;
-
-	/* runtime - OR'd from 'mtex' */
-	short texco, mapto;
-	
-	/* ramp colors */
-	struct ColorBand *ramp_col;
-	struct ColorBand *ramp_spec;
-	char rampin_col, rampin_spec;
-	char rampblend_col, rampblend_spec;
-	short ramp_show, pad3;
-	float rampfac_col, rampfac_spec;
-
-	struct MTex *mtex[18];		/* MAX_MTEX */
-	struct bNodeTree *nodetree;
-	struct Ipo *ipo  DNA_DEPRECATED;  /* old animation system, deprecated for 2.5 */
-	struct Group *group;	/* light group */
-	struct PreviewImage *preview;
+	float alpha, ray_mirror, spec, gloss_mir;
 
-	/* dynamic properties */
-	float friction, fh, reflect;
-	float fhdist, xyfrict;
-	short dynamode, pad2;
+	/* Ror buttons and render. */
+	char pr_type, use_nodes;
+	short pr_lamp, pr_texture;
 
-	/* subsurface scattering */
-	float sss_radius[3], sss_col[3];
-	float sss_error, sss_scale, sss_ior;
-	float sss_colfac, sss_texfac;
-	float sss_front, sss_back;
-	short sss_flag, sss_preset;
+	/* Index for render passes. */
+	short index;
 
-	int mapto_textured;	/* render-time cache to optimize texture lookups */
-	short shadowonly_flag;  /* "shadowsonly" type */
-	short index;            /* custom index for render passes */
+	struct bNodeTree *nodetree;
+	struct Ipo *ipo  DNA_DEPRECATED;  /* old animation system, deprecated for 2.5 */
+	struct PreviewImage *preview;
 
-	/* Freestyle line settings */
+	/* Freestyle line settings. */
 	float line_col[4];
 	short line_priority;
 	short vcol_alpha;
 
-	/* texture painting */
+	/* Texture painting slots. */
 	short paint_active_slot;
 	short paint_clone_slot;
 	short tot_slots;
-	short pad4[3];
-
-	/* multiple tangent (Normal Map node) */
-	char nmap_tangent_names[9][64]; /* [MAX_MTFACE+1][MAX_NAME]; +1 for empty name */
-	int nmap_tangent_names_count, pad5;
+	short pad2[3];
 
-	/* Transparency */
+	/* Transparency. */
 	float alpha_threshold;
 	float refract_depth;
 	char blend_method;
 	char blend_shadow;
 	char blend_flag;
-	char pad6[5];
+	char pad3[5];
 
-	/* image to use for image/uv space, also bake target
-	 * (not to be used shading/rendering pipeline, this is editor featyure only!). */
-	struct Image *edit_image;
+	/* Cached slots for texture painting, must be refreshed in
+	 * refresh_texpaint_image_cache before using. */
+	struct TexPaintSlot *texpaintslot;
 
-	struct TexPaintSlot *texpaintslot; /* cached slot for painting. Make sure to recalculate before use
-	                                    * with refresh_texpaint_image_cache */
-	ListBase gpumaterial;		/* runtime */
+	/* Runtime cache for GLSL materials. */
+	ListBase gpumaterial;
 } Material;
 
 /* **************** MATERIAL ********************* */
@@ -227,12 +121,6 @@ typedef struct Material {
  * -1 because for active material we store the index + 1 */
 #define MAXMAT			(32767-1)
 
-/* material_type */
-#define MA_TYPE_SURFACE	0
-#define MA_TYPE_HALO	1
-#define MA_TYPE_VOLUME	2
-#define MA_TYPE_WIRE	3
-
 /* flag */
 		/* for render */
 #define MA_IS_USED		1
@@ -244,101 +132,7 @@ typedef struct Material {
 		 */
 #define MA_DS_SHOW_TEXS	4
 
-/* mode (is int) */
-#define MA_TRACEBLE		1
-#define MA_SHADOW		2
-#define MA_SHLESS		4
-#define MA_WIRE			8			/* deprecated */
-#define MA_VERTEXCOL	16
-#define MA_HALO_SOFT	16
-#define MA_HALO			32			/* deprecated */
-#define MA_ZTRANSP		64
-#define MA_VERTEXCOLP	128
-#define MA_ZINV			256
-#define MA_HALO_RINGS	256
-#define MA_ENV			512
-#define MA_HALO_LINES	512
-#define MA_ONLYSHADOW	1024
-#define MA_HALO_XALPHA	1024
-#define MA_STAR			0x800
-// #define MA_FACETEXTURE	0x800	/* deprecated */
-#define MA_HALOTEX		0x1000
-#define MA_HALOPUNO		0x2000
-#define MA_ONLYCAST		0x2000
-#define MA_NOMIST		0x4000
-#define MA_HALO_SHADE	0x4000
-#define MA_HALO_FLARE	0x8000
-#define MA_TRANSP		0x10000
-#define MA_RAYTRANSP	0x20000
-#define MA_RAYMIRROR	0x40000
-#define MA_SHADOW_TRA	0x80000
-#define MA_RAMP_COL		0x100000
-#define MA_RAMP_SPEC	0x200000
-#define MA_RAYBIAS		0x400000
-#define MA_FULL_OSA		0x800000
-#define MA_TANGENT_STR	0x1000000
-#define MA_SHADBUF		0x2000000
-		/* note; we drop MA_TANGENT_STR later to become tangent_u */
-#define MA_TANGENT_V	0x4000000
-/* qdn: a bit clumsy this, tangents needed for normal maps separated from shading */
-#define MA_NORMAP_TANG	0x8000000
-#define MA_GROUP_NOLAY	0x10000000
-// #define MA_FACETEXTURE_ALPHA	0x20000000	/* deprecated */
-#define MA_STR_B_UNITS	0x40000000
-#define MA_STR_SURFDIFF 0x80000000
-
-#define	MA_MODE_MASK	0x6fffffff	/* all valid mode bits */
-#define MA_MODE_PIPELINE	(MA_TRANSP | MA_ZTRANSP | MA_RAYTRANSP \
-				 | MA_TRACEBLE | MA_FULL_OSA | MA_ENV | MA_ZINV \
-				 | MA_ONLYCAST | MA_SHADBUF)
-
-/* mode2 (is int) */
-#define MA_CASTSHADOW		(1 << 0)
-#define MA_MODE2_PIPELINE	(MA_CASTSHADOW)
-#define MA_TANGENT_CONCRETE	(1 << 1)
-
-/* mapflag */
-#define MA_MAPFLAG_UVPROJECT (1 << 0)
-
-/* ray mirror fadeout */
-#define MA_RAYMIR_FADETOSKY	0
-#define MA_RAYMIR_FADETOMAT	1
-
-/* shadowonly_flag */
-#define MA_SO_OLD			0
-#define MA_SO_SHADOW		1
-#define MA_SO_SHADED		2
-
-/* shade_flag */
-#define MA_CUBIC			1
-#define MA_OBCOLOR			2
-#define MA_APPROX_OCCLUSION	4
-#define MA_GROUP_LOCAL      8
-
-/* diff_shader */
-#define MA_DIFF_LAMBERT		0
-#define MA_DIFF_ORENNAYAR	1
-#define MA_DIFF_TOON		2
-#define MA_DIFF_MINNAERT    3
-#define MA_DIFF_FRESNEL     4
-
-/* spec_shader */
-#define MA_SPEC_COOKTORR	0
-#define MA_SPEC_PHONG		1
-#define MA_SPEC_BLINN		2
-#define MA_SPEC_TOON		3
-#define MA_SPEC_WARDISO		4
-
-/* dynamode */
-// #define MA_DRAW_DYNABUTS    1		/* deprecated */
-#define MA_FH_NOR	        2
-
 /* ramps */
-#define MA_RAMP_IN_SHADER	0
-#define MA_RAMP_IN_ENERGY	1
-#define MA_RAMP_IN_NOR		2
-#define MA_RAMP_IN_RESULT	3
-
 #define MA_RAMP_BLEND		0
 #define MA_RAMP_ADD			1
 #define MA_RAMP_MULT		2
@@ -380,38 +174,7 @@ typedef struct Material {
 
 /* mapto */
 #define MAP_COL			1
-#define MAP_NORM		2
-#define MAP_COLSPEC		4
-#define MAP_COLMIR		8
-#define MAP_VARS		(0xFFF0)
-#define MAP_REF			16
-#define MAP_SPEC		32
-#define MAP_EMIT		64
 #define MAP_ALPHA		128
-#define MAP_HAR			256
-#define MAP_RAYMIRR		512
-#define MAP_TRANSLU		1024
-#define MAP_AMB			2048
-#define MAP_DISPLACE	4096
-#define MAP_WARP		8192
-// #define MAP_LAYER		16384		/* unused */
-
-/* volume mapto - reuse definitions for now - a bit naughty! */
-#define MAP_DENSITY				128
-#define MAP_EMISSION			64
-#define MAP_EMISSION_COL		1
-#define MAP_SCATTERING			16
-#define MAP_TRANSMISSION_COL	8
-#define MAP_REFLECTION_COL		4
-#define MAP_REFLECTION			32
-
-
-/* mapto for halo */
-//#define MAP_HA_COL		1
-//#define MAP_HA_ALPHA	128
-//#define MAP_HA_HAR		256
-//#define MAP_HA_SIZE		2
-//#define MAP_HA_ADD		64
 
 /* pmapto */
 /* init */
@@ -444,25 +207,6 @@ typedef struct Material {
 #define MA_HAIR			10
 #define MA_ATMOS		11
 
-/* sss_flag */
-#define MA_DIFF_SSS		1
-
-/* vol_stepsize_type */
-#define MA_VOL_STEP_RANDOMIZED	0
-#define MA_VOL_STEP_CONSTANT	1
-#define MA_VOL_STEP_ADAPTIVE	2
-
-/* vol_shadeflag */
-#define MA_VOL_RECV_EXT_SHADOW	1
-#define MA_VOL_PRECACHESHADING	8
-
-/* vol_shading_type */
-#define MA_VOL_SHADE_SHADELESS					0
-#define MA_VOL_SHADE_SHADOWED					2
-#define MA_VOL_SHADE_SHADED						1
-#define MA_VOL_SHADE_MULTIPLE					3
-#define MA_VOL_SHADE_SHADEDPLUSMULTIPLE			4
-
 /* blend_method */
 enum {
 	MA_BM_SOLID,