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, 18 insertions, 146 deletions

diff --git a/source/blender/blenkernel/intern/dynamicpaint.c b/source/blender/blenkernel/intern/dynamicpaint.c
index 6f0135616f0..27840af291b 100644
--- a/source/blender/blenkernel/intern/dynamicpaint.c
+++ b/source/blender/blenkernel/intern/dynamicpaint.c
@@ -531,11 +531,6 @@ static int surface_getBrushFlags(DynamicPaintSurface *surface, const ViewLayer *
 	return flags;
 }
 
-static int brush_usesMaterial(const DynamicPaintBrushSettings *brush, const Scene *scene)
-{
-	return ((brush->flags & MOD_DPAINT_USE_MATERIAL) && (!BKE_scene_use_new_shading_nodes(scene)));
-}
-
 /* check whether two bounds intersect */
 static bool boundsIntersect(Bounds3D *b1, Bounds3D *b2)
 {
@@ -1096,7 +1091,6 @@ bool dynamicPaint_createType(struct DynamicPaintModifierData *pmd, int type, str
 			brush->flags = MOD_DPAINT_ABS_ALPHA | MOD_DPAINT_RAMP_ALPHA;
 			brush->collision = MOD_DPAINT_COL_VOLUME;
 
-			brush->mat = NULL;
 			brush->r = 0.15f;
 			brush->g = 0.4f;
 			brush->b = 0.8f;
@@ -1236,7 +1230,6 @@ void dynamicPaint_Modifier_copy(struct DynamicPaintModifierData *pmd, struct Dyn
 		t_brush->flags = brush->flags;
 		t_brush->collision = brush->collision;
 
-		t_brush->mat = brush->mat;
 		t_brush->r = brush->r;
 		t_brush->g = brush->g;
 		t_brush->b = brush->b;
@@ -3336,91 +3329,6 @@ void dynamicPaint_outputSurfaceImage(DynamicPaintSurface *surface, char *filenam
 }
 
 
-/***************************** Material / Texture Sampling ******************************/
-
-/* stores a copy of required materials to allow doing adjustments
- *  without interfering the render/preview */
-typedef struct BrushMaterials {
-	Material *mat;
-	Material **ob_mats;
-	int tot;
-} BrushMaterials;
-
-/* Initialize materials for brush object:
- *  Calculates inverse matrices for linked objects, updates
- *  volume caches etc. */
-static void dynamicPaint_updateBrushMaterials(Depsgraph *depsgraph, Object *brushOb, Material *ui_mat, Scene *scene, BrushMaterials *bMats)
-{
-	/* Calculate inverse transformation matrix
-	 *  for this object */
-	invert_m4_m4(brushOb->imat, brushOb->obmat);
-	copy_m4_m4(brushOb->imat_ren, brushOb->imat);
-
-	/* Now process every material linked to this brush object */
-	if ((ui_mat == NULL) && brushOb->mat && brushOb->totcol) {
-		int i, tot = (*give_totcolp(brushOb));
-
-		/* allocate material pointer array */
-		if (tot) {
-			bMats->ob_mats = MEM_callocN(sizeof(Material *) * (tot), "BrushMaterials");
-			for (i = 0; i < tot; i++) {
-				bMats->ob_mats[i] = RE_sample_material_init(depsgraph, give_current_material(brushOb, (i + 1)), scene);
-			}
-		}
-		bMats->tot = tot;
-	}
-	else {
-		bMats->mat = RE_sample_material_init(depsgraph, ui_mat, scene);
-	}
-}
-
-/* free all data allocated by dynamicPaint_updateBrushMaterials() */
-static void dynamicPaint_freeBrushMaterials(BrushMaterials *bMats)
-{
-	/* Now process every material linked to this brush object */
-	if (bMats->ob_mats) {
-		int i;
-		for (i = 0; i < bMats->tot; i++) {
-			RE_sample_material_free(bMats->ob_mats[i]);
-		}
-		MEM_freeN(bMats->ob_mats);
-	}
-	else if (bMats->mat) {
-		RE_sample_material_free(bMats->mat);
-	}
-}
-
-/*
- *	Get material diffuse color and alpha (including linked textures) in given coordinates
- */
-static void dynamicPaint_doMaterialTex(
-        const BrushMaterials *bMats, float color[3], float *alpha, Object *brushOb,
-        const float volume_co[3], const float surface_co[3],
-        int triIndex, DerivedMesh *orcoDm)
-{
-	Material *mat = bMats->mat;
-
-	const MLoopTri *mlooptri = orcoDm->getLoopTriArray(orcoDm);
-	const MPoly *mpoly = orcoDm->getPolyArray(orcoDm);
-
-	/* If no material defined, use the one assigned to the mesh face */
-	if (mat == NULL) {
-		if (bMats->ob_mats) {
-			int mat_nr = mpoly[mlooptri[triIndex].poly].mat_nr;
-			if (mat_nr >= (*give_totcolp(brushOb)))
-				return;
-			mat = bMats->ob_mats[mat_nr];
-			if (mat == NULL)
-				return;    /* No material assigned */
-		}
-		else {
-			return;
-		}
-	}
-	RE_sample_material_color(mat, color, alpha, volume_co, surface_co, triIndex, orcoDm, brushOb);
-}
-
-
 /***************************** Ray / Nearest Point Utils ******************************/
 
 
@@ -3846,7 +3754,6 @@ typedef struct DynamicPaintPaintData {
 	const DynamicPaintSurface *surface;
 	const DynamicPaintBrushSettings *brush;
 	Object *brushOb;
-	const BrushMaterials *bMats;
 	const Scene *scene;
 	const float timescale;
 	const int c_index;
@@ -3883,14 +3790,10 @@ static void dynamic_paint_paint_mesh_cell_point_cb_ex(
 	VolumeGrid *grid = bData->grid;
 
 	const DynamicPaintBrushSettings *brush = data->brush;
-	Object *brushOb = data->brushOb;
-	const BrushMaterials *bMats = data->bMats;
 
-	const Scene *scene = data->scene;
 	const float timescale = data->timescale;
 	const int c_index = data->c_index;
 
-	DerivedMesh *dm = data->dm;
 	const MVert *mvert = data->mvert;
 	const MLoop *mloop = data->mloop;
 	const MLoopTri *mlooptri = data->mlooptri;
@@ -4150,13 +4053,6 @@ static void dynamic_paint_paint_mesh_cell_point_cb_ex(
 			sampleColor[1] = brush->g;
 			sampleColor[2] = brush->b;
 
-			/* Get material+textures color on hit point if required	*/
-			if (brush_usesMaterial(brush, scene)) {
-				dynamicPaint_doMaterialTex(bMats, sampleColor, &alpha_factor, brushOb,
-				                           bData->realCoord[bData->s_pos[index] + ss].v,
-				                           hitCoord, hitTri, dm);
-			}
-
 			/* Sample proximity colorband if required	*/
 			if ((hit_found == HIT_PROXIMITY) &&
 			    (brush->proximity_falloff == MOD_DPAINT_PRFALL_RAMP))
@@ -4207,7 +4103,6 @@ static void dynamic_paint_paint_mesh_cell_point_cb_ex(
 static int dynamicPaint_paintMesh(struct Depsgraph *depsgraph, DynamicPaintSurface *surface,
                                   DynamicPaintBrushSettings *brush,
                                   Object *brushOb,
-                                  BrushMaterials *bMats,
                                   Scene *scene,
                                   float timescale)
 {
@@ -4285,7 +4180,7 @@ static int dynamicPaint_paintMesh(struct Depsgraph *depsgraph, DynamicPaintSurfa
 					/* loop through cell points and process brush */
 					DynamicPaintPaintData data = {
 					    .surface = surface,
-					    .brush = brush, .brushOb = brushOb, .bMats = bMats,
+					    .brush = brush, .brushOb = brushOb,
 					    .scene = scene, .timescale = timescale, .c_index = c_index,
 					    .dm = dm, .mvert = mvert, .mloop = mloop, .mlooptri = mlooptri,
 					    .brush_radius = brush_radius, .avg_brushNor = avg_brushNor, .brushVelocity = brushVelocity,
@@ -4610,13 +4505,9 @@ static void dynamic_paint_paint_single_point_cb_ex(
 	const PaintBakeData *bData = sData->bData;
 
 	const DynamicPaintBrushSettings *brush = data->brush;
-	Object *brushOb = data->brushOb;
-	const BrushMaterials *bMats = data->bMats;
 
-	const Scene *scene = data->scene;
 	const float timescale = data->timescale;
 
-	const MVert *mvert = data->mvert;
 	const float brush_radius = data->brush_radius;
 	const Vec3f *brushVelocity = data->brushVelocity;
 
@@ -4645,17 +4536,6 @@ static void dynamic_paint_paint_single_point_cb_ex(
 		float depth = 0.0f;
 		float velocity_val = 0.0f;
 
-		/* material */
-		if (brush_usesMaterial(brush, scene)) {
-			float alpha_factor = 1.0f;
-			float hit_coord[3];
-			/* use dummy coord of first vertex */
-			mul_v3_m4v3(hit_coord, brushOb->obmat, mvert[0].co);
-
-			dynamicPaint_doMaterialTex(bMats, paintColor, &alpha_factor, brushOb,
-			                           bData->realCoord[bData->s_pos[index]].v, hit_coord, 0, brush->dm);
-		}
-
 		/* color ramp */
 		if (brush->proximity_falloff == MOD_DPAINT_PRFALL_RAMP &&
 		    BKE_colorband_evaluate(brush->paint_ramp, (1.0f - strength), colorband))
@@ -4693,11 +4573,9 @@ static void dynamic_paint_paint_single_point_cb_ex(
 				paintColor[2] = colorband[2];
 			}
 			else {
-				if (!brush_usesMaterial(brush, scene)) {
-					paintColor[0] = brush->r;
-					paintColor[1] = brush->g;
-					paintColor[2] = brush->b;
-				}
+				paintColor[0] = brush->r;
+				paintColor[1] = brush->g;
+				paintColor[2] = brush->b;
 			}
 		}
 		else if (ELEM(surface->type, MOD_DPAINT_SURFACE_T_DISPLACE, MOD_DPAINT_SURFACE_T_WAVE)) {
@@ -4711,7 +4589,7 @@ static void dynamic_paint_paint_single_point_cb_ex(
 
 static int dynamicPaint_paintSinglePoint(
         struct Depsgraph *depsgraph, DynamicPaintSurface *surface, float *pointCoord, DynamicPaintBrushSettings *brush,
-        Object *brushOb, BrushMaterials *bMats, Scene *scene, float timescale)
+        Object *brushOb, Scene *scene, float timescale)
 {
 	PaintSurfaceData *sData = surface->data;
 	float brush_radius = brush->paint_distance * surface->radius_scale;
@@ -4727,7 +4605,7 @@ static int dynamicPaint_paintSinglePoint(
 	 */
 	DynamicPaintPaintData data = {
 	    .surface = surface,
-	    .brush = brush, .brushOb = brushOb, .bMats = bMats,
+	    .brush = brush, .brushOb = brushOb,
 	    .scene = scene, .timescale = timescale,
 	    .mvert = mvert,
 	    .brush_radius = brush_radius, .brushVelocity = &brushVel,
@@ -6068,7 +5946,6 @@ static int dynamicPaint_doStep(struct Depsgraph *depsgraph, Scene *scene, Object
 				/* make sure we're dealing with a brush	*/
 				if (pmd2->brush) {
 					DynamicPaintBrushSettings *brush = pmd2->brush;
-					BrushMaterials bMats = {NULL};
 
 					/* calculate brush speed vectors if required */
 					if (surface->type == MOD_DPAINT_SURFACE_T_PAINT && brush->flags & MOD_DPAINT_DO_SMUDGE) {
@@ -6086,32 +5963,27 @@ static int dynamicPaint_doStep(struct Depsgraph *depsgraph, Scene *scene, Object
 						BKE_object_modifier_update_subframe(depsgraph, scene, brushObj, true, SUBFRAME_RECURSION,
 						                                    BKE_scene_frame_get(scene), eModifierType_DynamicPaint);
 					}
-					/* Prepare materials if required	*/
-					if (brush_usesMaterial(brush, scene))
-						dynamicPaint_updateBrushMaterials(depsgraph, brushObj, brush->mat, scene, &bMats);
+
 
 					/* Apply brush on the surface depending on it's collision type */
-						if (brush->psys && brush->psys->part &&
-						    ELEM(brush->psys->part->type, PART_EMITTER, PART_FLUID) &&
-						    psys_check_enabled(brushObj, brush->psys, G.is_rendering))
-						{
-							/* Paint a particle system */
-							BKE_animsys_evaluate_animdata(scene, &brush->psys->part->id, brush->psys->part->adt,
-							                              BKE_scene_frame_get(scene), ADT_RECALC_ANIM);
-							dynamicPaint_paintParticles(surface, brush->psys, brush, timescale);
-						}
+					if (brush->psys && brush->psys->part &&
+						ELEM(brush->psys->part->type, PART_EMITTER, PART_FLUID) &&
+						psys_check_enabled(brushObj, brush->psys, G.is_rendering))
+					{
+						/* Paint a particle system */
+						BKE_animsys_evaluate_animdata(scene, &brush->psys->part->id, brush->psys->part->adt,
+													  BKE_scene_frame_get(scene), ADT_RECALC_ANIM);
+						dynamicPaint_paintParticles(surface, brush->psys, brush, timescale);
+					}
 					/* Object center distance: */
 					if (brush->collision == MOD_DPAINT_COL_POINT && brushObj != ob) {
-						dynamicPaint_paintSinglePoint(depsgraph, surface, brushObj->loc, brush, brushObj, &bMats, scene, timescale);
+						dynamicPaint_paintSinglePoint(depsgraph, surface, brushObj->loc, brush, brushObj, scene, timescale);
 					}
 					/* Mesh volume/proximity: */
 					else if (brushObj != ob) {
-						dynamicPaint_paintMesh(depsgraph, surface, brush, brushObj, &bMats, scene, timescale);
+						dynamicPaint_paintMesh(depsgraph, surface, brush, brushObj, scene, timescale);
 					}
 
-					/* free temp material data */
-					if (brush_usesMaterial(brush, scene))
-						dynamicPaint_freeBrushMaterials(&bMats);
 					/* reset object to it's original state */
 					if (subframe) {
 						scene->r.cfra = scene_frame;