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, 27 insertions, 44 deletions

diff --git a/source/blender/blenkernel/intern/particle.c b/source/blender/blenkernel/intern/particle.c
index 07c8735f108..ae6028c742a 100644
--- a/source/blender/blenkernel/intern/particle.c
+++ b/source/blender/blenkernel/intern/particle.c
@@ -1031,7 +1031,7 @@ static void interpolate_pathcache(ParticleCacheKey *first, float t, ParticleCach
 /* interpolate a location on a face based on face coordinates */
 void psys_interpolate_face(MVert *mvert, MFace *mface, MTFace *tface, float (*orcodata)[3],
                            float w[4], float vec[3], float nor[3], float utan[3], float vtan[3],
-                           float orco[3], float ornor[3])
+                           float orco[3])
 {
 	float *v1 = 0, *v2 = 0, *v3 = 0, *v4 = 0;
 	float e1[3], e2[3], s1, s2, t1, t2;
@@ -1129,21 +1129,13 @@ void psys_interpolate_face(MVert *mvert, MFace *mface, MTFace *tface, float (*or
 				o4 = orcodata[mface->v4];
 
 				interp_v3_v3v3v3v3(orco, o1, o2, o3, o4, w);
-
-				if (ornor)
-					normal_quad_v3(ornor, o1, o2, o3, o4);
 			}
 			else {
 				interp_v3_v3v3v3(orco, o1, o2, o3, w);
-
-				if (ornor)
-					normal_tri_v3(ornor, o1, o2, o3);
 			}
 		}
 		else {
 			copy_v3_v3(orco, vec);
-			if (ornor && nor)
-				copy_v3_v3(ornor, nor);
 		}
 	}
 }
@@ -1423,7 +1415,7 @@ static int psys_map_index_on_dm(DerivedMesh *dm, int from, int index, int index_
 /* interprets particle data to get a point on a mesh in object space */
 void psys_particle_on_dm(DerivedMesh *dm_final, int from, int index, int index_dmcache,
                          const float fw[4], float foffset, float vec[3], float nor[3], float utan[3], float vtan[3],
-                         float orco[3], float ornor[3])
+                         float orco[3])
 {
 	float tmpnor[3], mapfw[4];
 	float (*orcodata)[3];
@@ -1433,7 +1425,6 @@ void psys_particle_on_dm(DerivedMesh *dm_final, int from, int index, int index_d
 		if (vec) { vec[0] = vec[1] = vec[2] = 0.0; }
 		if (nor) { nor[0] = nor[1] = 0.0; nor[2] = 1.0; }
 		if (orco) { orco[0] = orco[1] = orco[2] = 0.0; }
-		if (ornor) { ornor[0] = ornor[1] = 0.0; ornor[2] = 1.0; }
 		if (utan) { utan[0] = utan[1] = utan[2] = 0.0; }
 		if (vtan) { vtan[0] = vtan[1] = vtan[2] = 0.0; }
 
@@ -1459,11 +1450,6 @@ void psys_particle_on_dm(DerivedMesh *dm_final, int from, int index, int index_d
 			}
 		}
 
-		if (ornor) {
-			dm_final->getVertNo(dm_final, mapindex, ornor);
-			normalize_v3(ornor);
-		}
-
 		if (utan && vtan) {
 			utan[0] = utan[1] = utan[2] = 0.0f;
 			vtan[0] = vtan[1] = vtan[2] = 0.0f;
@@ -1482,7 +1468,7 @@ void psys_particle_on_dm(DerivedMesh *dm_final, int from, int index, int index_d
 			mtface += mapindex;
 
 		if (from == PART_FROM_VOLUME) {
-			psys_interpolate_face(mvert, mface, mtface, orcodata, mapfw, vec, tmpnor, utan, vtan, orco, ornor);
+			psys_interpolate_face(mvert, mface, mtface, orcodata, mapfw, vec, tmpnor, utan, vtan, orco);
 			if (nor)
 				copy_v3_v3(nor, tmpnor);
 
@@ -1491,7 +1477,7 @@ void psys_particle_on_dm(DerivedMesh *dm_final, int from, int index, int index_d
 			add_v3_v3(vec, tmpnor);
 		}
 		else
-			psys_interpolate_face(mvert, mface, mtface, orcodata, mapfw, vec, nor, utan, vtan, orco, ornor);
+			psys_interpolate_face(mvert, mface, mtface, orcodata, mapfw, vec, nor, utan, vtan, orco);
 	}
 }
 
@@ -1527,7 +1513,7 @@ ParticleSystemModifierData *psys_get_modifier(Object *ob, ParticleSystem *psys)
 /* ready for future use */
 static void psys_particle_on_shape(int UNUSED(distr), int UNUSED(index),
                                    float *UNUSED(fuv), float vec[3], float nor[3], float utan[3], float vtan[3],
-                                   float orco[3], float ornor[3])
+                                   float orco[3])
 {
 	/* TODO */
 	float zerovec[3] = {0.0f, 0.0f, 0.0f};
@@ -1546,9 +1532,6 @@ static void psys_particle_on_shape(int UNUSED(distr), int UNUSED(index),
 	if (orco) {
 		copy_v3_v3(orco, zerovec);
 	}
-	if (ornor) {
-		copy_v3_v3(ornor, zerovec);
-	}
 }
 /************************************************/
 /*			Particles on emitter				*/
@@ -1591,7 +1574,7 @@ CustomDataMask psys_emitter_customdata_mask(ParticleSystem *psys)
 
 void psys_particle_on_emitter(ParticleSystemModifierData *psmd, int from, int index, int index_dmcache,
                               float fuv[4], float foffset, float vec[3], float nor[3], float utan[3], float vtan[3],
-                              float orco[3], float ornor[3])
+                              float orco[3])
 {
 	if (psmd && psmd->dm_final) {
 		if (psmd->psys->part->distr == PART_DISTR_GRID && psmd->psys->part->from != PART_FROM_VERT) {
@@ -1603,10 +1586,10 @@ void psys_particle_on_emitter(ParticleSystemModifierData *psmd, int from, int in
 			return;
 		}
 		/* we cant use the num_dmcache */
-		psys_particle_on_dm(psmd->dm_final, from, index, index_dmcache, fuv, foffset, vec, nor, utan, vtan, orco, ornor);
+		psys_particle_on_dm(psmd->dm_final, from, index, index_dmcache, fuv, foffset, vec, nor, utan, vtan, orco);
 	}
 	else
-		psys_particle_on_shape(from, index, fuv, vec, nor, utan, vtan, orco, ornor);
+		psys_particle_on_shape(from, index, fuv, vec, nor, utan, vtan, orco);
 
 }
 /************************************************/
@@ -1628,7 +1611,7 @@ void precalc_guides(ParticleSimulationData *sim, ListBase *effectors)
 		return;
 
 	LOOP_PARTICLES {
-		psys_particle_on_emitter(sim->psmd, sim->psys->part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, state.co, 0, 0, 0, 0, 0);
+		psys_particle_on_emitter(sim->psmd, sim->psys->part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, state.co, 0, 0, 0, 0);
 		
 		mul_m4_v3(sim->ob->obmat, state.co);
 		mul_mat3_m4_v3(sim->ob->obmat, state.vel);
@@ -1867,7 +1850,7 @@ void psys_find_parents(ParticleSimulationData *sim, const bool use_render_params
 	tree = BLI_kdtree_new(totparent);
 
 	for (p = 0, cpa = sim->psys->child; p < totparent; p++, cpa++) {
-		psys_particle_on_emitter(sim->psmd, from, cpa->num, DMCACHE_ISCHILD, cpa->fuv, cpa->foffset, co, 0, 0, 0, orco, 0);
+		psys_particle_on_emitter(sim->psmd, from, cpa->num, DMCACHE_ISCHILD, cpa->fuv, cpa->foffset, co, 0, 0, 0, orco);
 
 		/* Check if particle doesn't exist because of texture influence. Insert only existing particles into kdtree. */
 		get_cpa_texture(sim->psmd->dm_final, psys, part, psys->particles + cpa->pa[0], p, cpa->num, cpa->fuv, orco, &ptex, PAMAP_DENS | PAMAP_CHILD, psys->cfra);
@@ -1880,7 +1863,7 @@ void psys_find_parents(ParticleSimulationData *sim, const bool use_render_params
 	BLI_kdtree_balance(tree);
 
 	for (; p < totchild; p++, cpa++) {
-		psys_particle_on_emitter(sim->psmd, from, cpa->num, DMCACHE_ISCHILD, cpa->fuv, cpa->foffset, co, 0, 0, 0, orco, 0);
+		psys_particle_on_emitter(sim->psmd, from, cpa->num, DMCACHE_ISCHILD, cpa->fuv, cpa->foffset, co, 0, 0, 0, orco);
 		cpa->parent = BLI_kdtree_find_nearest(tree, orco, NULL);
 	}
 
@@ -2001,7 +1984,7 @@ static void psys_thread_create_path(ParticleTask *task, struct ChildParticle *cp
 	ParticleCacheKey *child, *key[4];
 	ParticleTexture ptex;
 	float *cpa_fuv = 0, *par_rot = 0, rot[4];
-	float orco[3], ornor[3], hairmat[4][4], dvec[3], off1[4][3], off2[4][3];
+	float orco[3], hairmat[4][4], dvec[3], off1[4][3], off2[4][3];
 	float eff_length, eff_vec[3], weight[4];
 	int k, cpa_num;
 	short cpa_from;
@@ -2097,7 +2080,7 @@ static void psys_thread_create_path(ParticleTask *task, struct ChildParticle *cp
 		cpa_fuv = cpa->fuv;
 		cpa_from = PART_FROM_FACE;
 
-		psys_particle_on_emitter(ctx->sim.psmd, cpa_from, cpa_num, DMCACHE_ISCHILD, cpa->fuv, foffset, co, ornor, 0, 0, orco, 0);
+		psys_particle_on_emitter(ctx->sim.psmd, cpa_from, cpa_num, DMCACHE_ISCHILD, cpa->fuv, foffset, co, 0, 0, orco, 0);
 
 		mul_m4_v3(ob->obmat, co);
 
@@ -2139,7 +2122,7 @@ static void psys_thread_create_path(ParticleTask *task, struct ChildParticle *cp
 			cpa_num = 0;
 		cpa_fuv = pa->fuv;
 
-		psys_particle_on_emitter(ctx->sim.psmd, cpa_from, cpa_num, DMCACHE_ISCHILD, cpa_fuv, pa->foffset, co, ornor, 0, 0, orco, 0);
+		psys_particle_on_emitter(ctx->sim.psmd, cpa_from, cpa_num, DMCACHE_ISCHILD, cpa_fuv, pa->foffset, co, 0, 0, orco, 0);
 
 		psys_mat_hair_to_global(ob, ctx->sim.psmd->dm_final, psys->part->from, pa, hairmat);
 	}
@@ -2247,9 +2230,9 @@ static void psys_thread_create_path(ParticleTask *task, struct ChildParticle *cp
 			BLI_listbase_clear(&modifiers);
 			
 			psys_particle_on_emitter(ctx->sim.psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset,
-			                         par_co, NULL, NULL, NULL, par_orco, NULL);
+			                         par_co, NULL, NULL, NULL, par_orco);
 			
-			psys_apply_child_modifiers(ctx, &modifiers, cpa, &ptex, orco, ornor, hairmat, child_keys, par, par_orco);
+			psys_apply_child_modifiers(ctx, &modifiers, cpa, &ptex, orco, hairmat, child_keys, par, par_orco);
 		}
 		else
 			zero_v3(par_orco);
@@ -2928,7 +2911,7 @@ void psys_mat_hair_to_object(Object *UNUSED(ob), DerivedMesh *dm, short from, Pa
 	}
 	
 	psys_face_mat(0, dm, pa, hairmat, 0);
-	psys_particle_on_dm(dm, from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, vec, 0, 0, 0, 0, 0);
+	psys_particle_on_dm(dm, from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, vec, 0, 0, 0, 0);
 	copy_v3_v3(hairmat[3], vec);
 }
 
@@ -2937,7 +2920,7 @@ void psys_mat_hair_to_orco(Object *ob, DerivedMesh *dm, short from, ParticleData
 	float vec[3], orco[3];
 
 	psys_face_mat(ob, dm, pa, hairmat, 1);
-	psys_particle_on_dm(dm, from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, vec, 0, 0, 0, orco, 0);
+	psys_particle_on_dm(dm, from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, vec, 0, 0, 0, orco);
 
 	/* see psys_face_mat for why this function is called */
 	if (DM_get_vert_data_layer(dm, CD_ORIGINDEX))
@@ -3442,7 +3425,7 @@ void psys_get_texture(ParticleSimulationData *sim, ParticleData *pa, ParticleTex
 					/* no break, failed to get uv's, so let's try orco's */
 					ATTR_FALLTHROUGH;
 				case TEXCO_ORCO:
-					psys_particle_on_emitter(sim->psmd, sim->psys->part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, co, 0, 0, 0, texvec, 0);
+					psys_particle_on_emitter(sim->psmd, sim->psys->part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, co, 0, 0, 0, texvec);
 					
 					if (me->bb == NULL || (me->bb->flag & BOUNDBOX_DIRTY)) {
 						BKE_mesh_texspace_calc(me);
@@ -3704,7 +3687,7 @@ void psys_get_particle_on_path(ParticleSimulationData *sim, int p, ParticleKey *
 				cpa_fuv = cpa->fuv;
 				cpa_from = PART_FROM_FACE;
 
-				psys_particle_on_emitter(psmd, cpa_from, cpa_num, DMCACHE_ISCHILD, cpa->fuv, foffset, co, 0, 0, 0, orco, 0);
+				psys_particle_on_emitter(psmd, cpa_from, cpa_num, DMCACHE_ISCHILD, cpa->fuv, foffset, co, 0, 0, 0, orco);
 
 				/* we need to save the actual root position of the child for positioning it accurately to the surface of the emitter */
 				//copy_v3_v3(cpa_1st, co);
@@ -3713,7 +3696,7 @@ void psys_get_particle_on_path(ParticleSimulationData *sim, int p, ParticleKey *
 
 				pa = psys->particles + cpa->parent;
 
-				psys_particle_on_emitter(psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, par_co, 0, 0, 0, par_orco, 0);
+				psys_particle_on_emitter(psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, par_co, 0, 0, 0, par_orco);
 				if (part->type == PART_HAIR)
 					psys_mat_hair_to_global(sim->ob, sim->psmd->dm_final, psys->part->from, pa, hairmat);
 				else
@@ -3733,9 +3716,9 @@ void psys_get_particle_on_path(ParticleSimulationData *sim, int p, ParticleKey *
 				cpa_num = pa->num;
 				cpa_fuv = pa->fuv;
 
-				psys_particle_on_emitter(psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, par_co, 0, 0, 0, par_orco, 0);
+				psys_particle_on_emitter(psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, par_co, 0, 0, 0, par_orco);
 				if (part->type == PART_HAIR) {
-					psys_particle_on_emitter(psmd, cpa_from, cpa_num, DMCACHE_ISCHILD, cpa_fuv, pa->foffset, co, 0, 0, 0, orco, 0);
+					psys_particle_on_emitter(psmd, cpa_from, cpa_num, DMCACHE_ISCHILD, cpa_fuv, pa->foffset, co, 0, 0, 0, orco);
 					psys_mat_hair_to_global(sim->ob, sim->psmd->dm_final, psys->part->from, pa, hairmat);
 				}
 				else {
@@ -4020,7 +4003,7 @@ void psys_get_dupli_texture(ParticleSystem *psys, ParticleSettings *part,
 				psys_interpolate_uvs(mtface, mface->v4, cpa->fuv, uv);
 			}
 		
-			psys_particle_on_emitter(psmd, PART_FROM_FACE, cpa->num, DMCACHE_ISCHILD, cpa->fuv, cpa->foffset, loc, 0, 0, 0, orco, 0);
+			psys_particle_on_emitter(psmd, PART_FROM_FACE, cpa->num, DMCACHE_ISCHILD, cpa->fuv, cpa->foffset, loc, 0, 0, 0, orco);
 			return;
 		}
 		else {
@@ -4051,7 +4034,7 @@ void psys_get_dupli_texture(ParticleSystem *psys, ParticleSettings *part,
 		}
 	}
 
-	psys_particle_on_emitter(psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, loc, 0, 0, 0, orco, 0);
+	psys_particle_on_emitter(psmd, part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, loc, 0, 0, 0, orco);
 }
 
 void psys_get_dupli_path_transform(ParticleSimulationData *sim, ParticleData *pa, ChildParticle *cpa, ParticleCacheKey *cache, float mat[4][4], float *scale)
@@ -4069,9 +4052,9 @@ void psys_get_dupli_path_transform(ParticleSimulationData *sim, ParticleData *pa
 		pa = psys->particles + cpa->pa[0];
 
 	if (pa)
-		psys_particle_on_emitter(psmd, sim->psys->part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, loc, nor, 0, 0, 0, 0);
+		psys_particle_on_emitter(psmd, sim->psys->part->from, pa->num, pa->num_dmcache, pa->fuv, pa->foffset, loc, nor, 0, 0, 0);
 	else
-		psys_particle_on_emitter(psmd, PART_FROM_FACE, cpa->num, DMCACHE_ISCHILD, cpa->fuv, cpa->foffset, loc, nor, 0, 0, 0, 0);
+		psys_particle_on_emitter(psmd, PART_FROM_FACE, cpa->num, DMCACHE_ISCHILD, cpa->fuv, cpa->foffset, loc, nor, 0, 0, 0);
 
 	if (psys->part->rotmode == PART_ROT_VEL) {
 		transpose_m3_m4(nmat, ob->imat);