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, 24 insertions, 116 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_image_proj.c b/source/blender/editors/sculpt_paint/paint_image_proj.c
index 469498f927a..cacb75b2668 100644
--- a/source/blender/editors/sculpt_paint/paint_image_proj.c
+++ b/source/blender/editors/sculpt_paint/paint_image_proj.c
@@ -283,7 +283,6 @@ typedef struct ProjPaintState {
 	bool  do_backfacecull;          /* ignore faces with normals pointing away, skips a lot of raycasts if your normals are correctly flipped */
 	bool  do_mask_normal;           /* mask out pixels based on their normals */
 	bool  do_mask_cavity;           /* mask out pixels based on cavity */
-	bool  do_new_shading_nodes;     /* cache BKE_scene_use_new_shading_nodes value */
 	float normal_angle;             /* what angle to mask at */
 	float normal_angle__cos;         /* cos(normal_angle), faster to compare */
 	float normal_angle_inner;
@@ -5102,7 +5101,6 @@ static void project_state_init(bContext *C, Object *ob, ProjPaintState *ps, int
 	else {
 		ps->do_backfacecull = ps->do_occlude = ps->do_mask_normal = 0;
 	}
-	ps->do_new_shading_nodes = BKE_scene_use_new_shading_nodes(scene); /* only cache the value */
 
 	if (ps->tool == PAINT_TOOL_CLONE)
 		ps->do_layer_clone = (settings->imapaint.flag & IMAGEPAINT_PROJECT_LAYER_CLONE) ? 1 : 0;
@@ -5438,7 +5436,6 @@ static int texture_paint_image_from_view_exec(bContext *C, wmOperator *op)
 
 	Depsgraph *depsgraph = CTX_data_depsgraph(C);
 	Scene *scene = CTX_data_scene(C);
-	ViewLayer *view_layer = CTX_data_view_layer(C);
 	ToolSettings *settings = scene->toolsettings;
 	View3D *v3d = CTX_wm_view3d(C);
 	RegionView3D *rv3d = CTX_wm_region_view3d(C);
@@ -5455,7 +5452,7 @@ static int texture_paint_image_from_view_exec(bContext *C, wmOperator *op)
 	if (h > maxsize) h = maxsize;
 
 	ibuf = ED_view3d_draw_offscreen_imbuf(
-	        depsgraph, scene, view_layer, v3d->drawtype,
+	        depsgraph, scene, v3d->drawtype,
 	        v3d, CTX_wm_region(C),
 	        w, h, IB_rect, V3D_OFSDRAW_NONE, R_ALPHAPREMUL, 0, NULL,
 	        NULL, err_out);
@@ -5626,20 +5623,11 @@ bool BKE_paint_proj_mesh_data_check(Scene *scene, Object *ob, bool *uvs, bool *m
 /* Add layer operator */
 
 static const EnumPropertyItem layer_type_items[] = {
-	{MAP_COL, "DIFFUSE_COLOR", 0, "Diffuse Color", ""},
-	{MAP_REF, "DIFFUSE_INTENSITY", 0, "Diffuse Intensity", ""},
-	{MAP_ALPHA, "ALPHA", 0, "Alpha", ""},
-	{MAP_TRANSLU, "TRANSLUCENCY", 0, "Translucency", ""},
-	{MAP_COLSPEC, "SPECULAR_COLOR", 0, "Specular Color", ""},
-	{MAP_SPEC, "SPECULAR_INTENSITY", 0, "Specular Intensity", ""},
-	{MAP_HAR, "SPECULAR_HARDNESS", 0, "Specular Hardness", ""},
-	{MAP_AMB, "AMBIENT", 0, "Ambient", ""},
-	{MAP_EMIT, "EMIT", 0, "Emit", ""},
-	{MAP_COLMIR, "MIRROR_COLOR", 0, "Mirror Color", ""},
-	{MAP_RAYMIRR, "RAYMIRROR", 0, "Ray Mirror", ""},
-	{MAP_NORM, "NORMAL", 0, "Normal", ""},
-	{MAP_WARP, "WARP", 0, "Warp", ""},
-	{MAP_DISPLACE, "DISPLACE", 0, "Displace", ""},
+	{0, "BASE_COLOR", 0, "Base Color", ""},
+	{1, "EMISSION", 0, "Emission", ""},
+	{2, "NORMAL", 0, "Normal", ""},
+	{3, "BUMP", 0, "Bump", ""},
+	{4, "DISPLACEMENT", 0, "Displacement", ""},
 	{0, NULL, 0, NULL, NULL}
 };
 
@@ -5674,7 +5662,6 @@ static bool proj_paint_add_slot(bContext *C, wmOperator *op)
 	Object *ob = CTX_data_active_object(C);
 	Scene *scene = CTX_data_scene(C);
 	Material *ma;
-	bool is_bi = BKE_scene_uses_blender_internal(scene);
 	Image *ima = NULL;
 
 	if (!ob)
@@ -5683,55 +5670,29 @@ static bool proj_paint_add_slot(bContext *C, wmOperator *op)
 	ma = give_current_material(ob, ob->actcol);
 
 	if (ma) {
+		/* TODO: use type to link to proper socket. */
 		Main *bmain = CTX_data_main(C);
 
-		if (!is_bi && BKE_scene_use_new_shading_nodes(scene)) {
-			bNode *imanode;
-			bNodeTree *ntree = ma->nodetree;
-
-			if (!ntree) {
-				ED_node_shader_default(C, &ma->id);
-				ntree = ma->nodetree;
-			}
-			
-			ma->use_nodes = true;
-						
-			/* try to add an image node */
-			imanode = nodeAddStaticNode(C, ntree, SH_NODE_TEX_IMAGE);
-			
-			ima = proj_paint_image_create(op, bmain);
-			imanode->id = &ima->id;
-			
-			nodeSetActive(ntree, imanode);
-					
-			ntreeUpdateTree(CTX_data_main(C), ntree);
-		}
-		else {
-			MTex *mtex = BKE_texture_mtex_add_id(&ma->id, -1);
-
-			/* successful creation of mtex layer, now create set */
-			if (mtex) {
-				int type = MAP_COL;
-				char imagename_buff[MAX_ID_NAME - 2];
-				const char *imagename = DATA_("Diffuse Color");
-
-				if (op) {
-					type = RNA_enum_get(op->ptr, "type");
-					RNA_string_get(op->ptr, "name", imagename_buff);
-					imagename = imagename_buff;
-				}
-
-				mtex->tex = BKE_texture_add(bmain, imagename);
-				mtex->mapto = type;
-
-				if (mtex->tex) {
-					ima = mtex->tex->ima = proj_paint_image_create(op, bmain);
-				}
+		bNode *imanode;
+		bNodeTree *ntree = ma->nodetree;
 
-				WM_event_add_notifier(C, NC_TEXTURE | NA_ADDED, mtex->tex);
-			}
+		if (!ntree) {
+			ED_node_shader_default(C, &ma->id);
+			ntree = ma->nodetree;
 		}
 		
+		ma->use_nodes = true;
+					
+		/* try to add an image node */
+		imanode = nodeAddStaticNode(C, ntree, SH_NODE_TEX_IMAGE);
+		
+		ima = proj_paint_image_create(op, bmain);
+		imanode->id = &ima->id;
+		
+		nodeSetActive(ntree, imanode);
+				
+		ntreeUpdateTree(CTX_data_main(C), ntree);
+		
 		if (ima) {
 			BKE_texpaint_slot_refresh_cache(scene, ma);
 			BKE_image_signal(ima, NULL, IMA_SIGNAL_USER_NEW_IMAGE);
@@ -5822,59 +5783,6 @@ void PAINT_OT_add_texture_paint_slot(wmOperatorType *ot)
 	RNA_def_boolean(ot->srna, "float", 0, "32 bit Float", "Create image with 32 bit floating point bit depth");
 }
 
-static int texture_paint_delete_texture_paint_slot_exec(bContext *C, wmOperator *UNUSED(op))
-{
-	Object *ob = CTX_data_active_object(C);
-	Scene *scene = CTX_data_scene(C);
-	Material *ma;
-	bool is_bi = BKE_scene_uses_blender_internal(scene);
-	TexPaintSlot *slot;
-	
-	/* not supported for node-based engines */
-	if (!ob || !is_bi)
-		return OPERATOR_CANCELLED;
-	
-	ma = give_current_material(ob, ob->actcol);
-	
-	if (!ma->texpaintslot || ma->use_nodes)
-		return OPERATOR_CANCELLED;
-	
-	slot = ma->texpaintslot + ma->paint_active_slot;
-	
-	if (ma->mtex[slot->index]->tex) {
-		id_us_min(&ma->mtex[slot->index]->tex->id);
-		
-		if (ma->mtex[slot->index]->tex->ima) {
-			id_us_min(&ma->mtex[slot->index]->tex->ima->id);
-		}
-	}
-	MEM_freeN(ma->mtex[slot->index]);
-	ma->mtex[slot->index] = NULL;
-	
-	BKE_texpaint_slot_refresh_cache(scene, ma);
-	DEG_id_tag_update(&ma->id, 0);
-	WM_event_add_notifier(C, NC_MATERIAL, ma);
-	/* we need a notifier for data change since we change the displayed modifier uvs */
-	WM_event_add_notifier(C, NC_GEOM | ND_DATA, ob->data);
-	return OPERATOR_FINISHED;
-}
-
-
-void PAINT_OT_delete_texture_paint_slot(wmOperatorType *ot)
-{
-	/* identifiers */
-	ot->name = "Delete Texture Paint Slot";
-	ot->description = "Delete selected texture paint slot";
-	ot->idname = "PAINT_OT_delete_texture_paint_slot";
-
-	/* api callbacks */
-	ot->exec = texture_paint_delete_texture_paint_slot_exec;
-	ot->poll = ED_operator_region_view3d_active;
-
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-}
-
 static int add_simple_uvs_exec(bContext *C, wmOperator *UNUSED(op))
 {
 	/* no checks here, poll function does them for us */