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.

5 files changed, 7 insertions, 245 deletions

diff --git a/source/blender/render/extern/include/RE_bake.h b/source/blender/render/extern/include/RE_bake.h
index 090e0e6c28d..d827a3507d9 100644
--- a/source/blender/render/extern/include/RE_bake.h
+++ b/source/blender/render/extern/include/RE_bake.h
@@ -76,9 +76,6 @@ bool RE_bake_engine(
 
 /* bake.c */
 int RE_pass_depth(const eScenePassType pass_type);
-bool RE_bake_internal(
-        struct Render *re, struct Object *object, const BakePixel pixel_array[],
-        const size_t num_pixels, const int depth, const eScenePassType pass_type, float result[]);
 
 bool RE_bake_pixels_populate_from_objects(
         struct Mesh *me_low, BakePixel pixel_array_from[], BakePixel pixel_array_to[],
diff --git a/source/blender/render/extern/include/RE_engine.h b/source/blender/render/extern/include/RE_engine.h
index 64d87876a2e..e857d508424 100644
--- a/source/blender/render/extern/include/RE_engine.h
+++ b/source/blender/render/extern/include/RE_engine.h
@@ -69,7 +69,6 @@ struct ViewLayer;
 #define RE_USE_TEXTURE_PREVIEW		128
 #define RE_USE_SHADING_NODES_CUSTOM 	256
 #define RE_USE_SPHERICAL_STEREO 512
-#define RE_USE_LEGACY_PIPELINE	1024 /* XXX Temporary flag, to be removed once draw manager is finished. */
 
 /* RenderEngine.flag */
 #define RE_ENGINE_ANIMATION		1
diff --git a/source/blender/render/extern/include/RE_pipeline.h b/source/blender/render/extern/include/RE_pipeline.h
index e60fc3abad2..022f2a31826 100644
--- a/source/blender/render/extern/include/RE_pipeline.h
+++ b/source/blender/render/extern/include/RE_pipeline.h
@@ -49,7 +49,6 @@ struct RenderResult;
 struct ReportList;
 struct Scene;
 struct ViewLayer;
-struct EnvMap;
 struct StampData;
 
 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
@@ -251,10 +250,8 @@ void RE_ChangeModeFlag(struct Render *re, int flag, bool clear);
 struct Object *RE_GetCamera(struct Render *re); /* return camera override if set */
 void RE_SetOverrideCamera(struct Render *re, struct Object *camera);
 void RE_SetCamera(struct Render *re, struct Object *camera);
-void RE_SetEnvmapCamera(struct Render *re, struct Object *cam_ob, float viewscale, float clipsta, float clipend);
 void RE_SetWindow(struct Render *re, const rctf *viewplane, float clipsta, float clipend);
 void RE_SetOrtho(struct Render *re, const rctf *viewplane, float clipsta, float clipend);
-void RE_SetPixelSize(struct Render *re, float pixsize);
 
 /* option to set viewmatrix before making dbase */
 void RE_SetView(struct Render *re, float mat[4][4]);
@@ -264,26 +261,13 @@ void RE_GetView(struct Render *re, float mat[4][4]);
 void RE_GetViewPlane(struct Render *re, rctf *r_viewplane, rcti *r_disprect);
 
 /* make or free the dbase */
-void RE_Database_FromScene(
-        struct Render *re, struct Main *bmain, struct Scene *scene,
-        unsigned int lay, int use_camera_view);
 void RE_Database_CameraOnly(
         struct Render *re, struct Main *bmain, struct Scene *scene,
         unsigned int lay, int use_camera_view);
-void RE_Database_Preprocess(struct Depsgraph *depsgraph, struct Render *re);
-void RE_Database_Free(struct Render *re);
-
-/* project dbase again, when viewplane/perspective changed */
-void RE_DataBase_ApplyWindow(struct Render *re);
-/* rotate scene again, for incremental render */
-void RE_DataBase_IncrementalView(struct Render *re, float viewmat[4][4], int restore);
 
 /* set the render threads based on the commandline and autothreads setting */
 void RE_init_threadcount(Render *re);
 
-/* the main processor, assumes all was set OK! */
-void RE_TileProcessor(struct Render *re);
-
 bool RE_WriteRenderViewsImage(
         struct ReportList *reports, struct RenderResult *rr, struct Scene *scene, const bool stamp, char *name);
 bool RE_WriteRenderViewsMovie(
@@ -318,14 +302,6 @@ bool RE_WriteRenderResult(
 struct RenderResult *RE_MultilayerConvert(
         void *exrhandle, const char *colorspace, bool predivide, int rectx, int recty);
 
-extern const float default_envmap_layout[];
-bool RE_WriteEnvmapResult(
-        struct ReportList *reports, struct Scene *scene, struct EnvMap *env,
-        const char *relpath, const char imtype, float layout[12]);
-
-/* do a full sample buffer compo */
-void RE_MergeFullSample(struct Render *re, struct Main *bmain, struct Scene *sce, struct bNodeTree *ntree);
-
 /* display and event callbacks */
 void RE_display_init_cb	(struct Render *re, void *handle, void (*f)(void *handle, RenderResult *rr));
 void RE_display_clear_cb(struct Render *re, void *handle, void (*f)(void *handle, RenderResult *rr));
@@ -348,27 +324,10 @@ struct RenderPass *RE_pass_find_by_name(volatile struct RenderLayer *rl, const c
 struct RenderPass *RE_pass_find_by_type(volatile struct RenderLayer *rl, int passtype, const char *viewname);
 
 /* shaded view or baking options */
-#define RE_BAKE_LIGHT				0	/* not listed in rna_scene.c -> can't be enabled! */
-#define RE_BAKE_ALL					1
+#define RE_BAKE_NORMALS				0
+#define RE_BAKE_DISPLACEMENT		1
 #define RE_BAKE_AO					2
-#define RE_BAKE_NORMALS				3
-#define RE_BAKE_TEXTURE				4
-#define RE_BAKE_DISPLACEMENT		5
-#define RE_BAKE_SHADOW				6
-#define RE_BAKE_SPEC_COLOR			7
-#define RE_BAKE_SPEC_INTENSITY		8
-#define RE_BAKE_MIRROR_COLOR		9
-#define RE_BAKE_MIRROR_INTENSITY	10
-#define RE_BAKE_ALPHA				11
-#define RE_BAKE_EMIT				12
-#define RE_BAKE_DERIVATIVE			13
-#define RE_BAKE_VERTEX_COLORS		14
-
-void RE_Database_Baking(
-        struct Render *re, struct Main *bmain, struct Scene *scene, struct ViewLayer *view_layer,
-        unsigned int lay, const int type, struct Object *actob);
-
-void RE_DataBase_GetView(struct Render *re, float mat[4][4]);
+
 void RE_GetCameraWindow(struct Render *re, struct Object *camera, int frame, float mat[4][4]);
 void RE_GetCameraModelMatrix(struct Render *re, struct Object *camera, float r_mat[4][4]);
 struct Scene *RE_GetScene(struct Render *re);
@@ -378,13 +337,6 @@ bool RE_is_rendering_allowed(struct Scene *scene, struct Object *camera_override
 
 bool RE_allow_render_generic_object(struct Object *ob);
 
-/* RE_updateRenderInstances flag */
-enum {
-	RE_OBJECT_INSTANCES_UPDATE_VIEW  = (1 << 0),
-	RE_OBJECT_INSTANCES_UPDATE_OBMAT = (1 << 1)
-};
-void RE_updateRenderInstances(Render *re, int flag);
-
 /******* defined in render_result.c *********/
 
 bool RE_HasCombinedLayer(RenderResult *res);
diff --git a/source/blender/render/extern/include/RE_render_ext.h b/source/blender/render/extern/include/RE_render_ext.h
index cf0ff009190..3b4b9262465 100644
--- a/source/blender/render/extern/include/RE_render_ext.h
+++ b/source/blender/render/extern/include/RE_render_ext.h
@@ -56,12 +56,6 @@ float texture_value_blend(float tex, float out, float fact, float facg, int blen
 void RE_texture_rng_init(void);
 void RE_texture_rng_exit(void);
 
-struct Material *RE_sample_material_init(struct Depsgraph *depsgraph, struct Material *orig_mat, struct Scene *scene);
-void RE_sample_material_free(struct Material *mat);
-void RE_sample_material_color(
-        struct Material *mat, float color[3], float *alpha, const float volume_co[3], const float surface_co[3],
-        int tri_index, struct DerivedMesh *orcoDm, struct Object *ob);
-
 /* imagetexture.c */
 void ibuf_sample(struct ImBuf *ibuf, float fx, float fy, float dx, float dy, float result[4]);
 
@@ -85,4 +79,6 @@ void RE_point_density_sample(
 
 void RE_point_density_free(struct PointDensity *pd);
 
+void RE_point_density_fix_linking(void);
+
 #endif /* __RE_RENDER_EXT_H__ */
diff --git a/source/blender/render/extern/include/RE_shader_ext.h b/source/blender/render/extern/include/RE_shader_ext.h
index 281f0082d7f..0d354c27e3a 100644
--- a/source/blender/render/extern/include/RE_shader_ext.h
+++ b/source/blender/render/extern/include/RE_shader_ext.h
@@ -33,7 +33,7 @@
 #define __RE_SHADER_EXT_H__
 
 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
-/* this include is for shading and texture exports            */
+/* this include is for texture exports                        */
 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
 
 /* localized texture result data */
@@ -44,148 +44,6 @@ typedef struct TexResult {
 	float *nor;
 } TexResult;
 
-/* localized shade result data */
-typedef struct ShadeResult {
-	float combined[4];
-	float col[4];
-	float alpha, mist, z;
-	float emit[3];
-	float diff[3];			/* diffuse with no ramps, shadow, etc */
-	float diffshad[3];		/* diffuse with shadow */
-	float spec[3];			/* specular with shadow */
-	float shad[4];			/* shad[3] is shadow intensity */
-	float ao[3];
-	float env[3];
-	float indirect[3];
-	float refl[3];
-	float refr[3];
-	float nor[3];
-	float winspeed[4];
-	float rayhits[4];
-} ShadeResult;
-
-/* only here for quick copy */
-struct ShadeInputCopy {
-	
-	struct Material *mat;
-	struct VlakRen *vlr;
-	struct StrandRen *strand;
-	struct ObjectInstanceRen *obi;
-	struct ObjectRen *obr;
-	int facenr;
-	float facenor[3];				/* copy from face */
-	short flippednor;				/* is facenor flipped? */
-	struct VertRen *v1, *v2, *v3;	/* vertices can be in any order for quads... */
-	short i1, i2, i3;				/* original vertex indices */
-	short puno;
-	short osatex;
-	float vn[3], vno[3];			/* actual render normal, and a copy to restore it */
-	float n1[3], n2[3], n3[3];		/* vertex normals, corrected */
-	int mode, mode2;			/* base material mode (OR-ed result of entire node tree) */
-};
-
-typedef struct ShadeInputUV {
-	float dxuv[3], dyuv[3], uv[3];
-	const char *name;
-} ShadeInputUV;
-
-typedef struct ShadeInputCol {
-	float col[4];
-	const char *name;
-} ShadeInputCol;
-
-/* localized renderloop data */
-typedef struct ShadeInput {
-	/* copy from face, also to extract tria from quad */
-	/* note it mirrors a struct above for quick copy */
-	
-	struct Material *mat;
-	struct VlakRen *vlr;
-	struct StrandRen *strand;
-	struct ObjectInstanceRen *obi;
-	struct ObjectRen *obr;
-	int facenr;
-	float facenor[3];				/* copy from face */
-	short flippednor;				/* is facenor flipped? */
-	struct VertRen *v1, *v2, *v3;	/* vertices can be in any order for quads... */
-	short i1, i2, i3;				/* original vertex indices */
-	short puno;
-	short osatex;
-	float vn[3], vno[3];			/* actual render normal, and a copy to restore it */
-	float n1[3], n2[3], n3[3];		/* vertex normals, corrected */
-	int mode, mode2;			/* base material mode (OR-ed result of entire node tree) */
-	
-	/* internal face coordinates */
-	float u, v, dx_u, dx_v, dy_u, dy_v;
-	float co[3], view[3], camera_co[3];
-	
-	/* copy from material, keep synced so we can do memcopy */
-	/* current size: 23*4 */
-	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, refl, spec, zoffs, add;
-	float translucency;
-	/* end direct copy from material */
-	
-	/* individual copies: */
-	int har; /* hardness */
-	
-	/* texture coordinates */
-	float lo[3], gl[3], ref[3], orn[3], winco[3], vcol[4];
-	float refcol[4], displace[3];
-	float strandco, tang[3], nmapnorm[3], nmaptang[4], stress, winspeed[4];
-	float duplilo[3], dupliuv[3];
-	float tangents[8][4]; /* 8 = MAX_MTFACE */
-
-	ShadeInputUV uv[8];   /* 8 = MAX_MTFACE */
-	ShadeInputCol col[8]; /* 8 = MAX_MCOL */
-	int totuv, totcol, actuv, actcol;
-	
-	/* dx/dy OSA coordinates */
-	float dxco[3], dyco[3];
-	float dxlo[3], dylo[3], dxgl[3], dygl[3];
-	float dxref[3], dyref[3], dxorn[3], dyorn[3];
-	float dxno[3], dyno[3], dxview, dyview;
-	float dxlv[3], dylv[3];
-	float dxwin[3], dywin[3];
-	float dxrefract[3], dyrefract[3];
-	float dxstrand, dystrand;
-	
-	/* AO is a pre-process now */
-	float ao[3], indirect[3], env[3];
-	
-	int xs, ys;				/* pixel to be rendered */
-	int mask;				/* subsample mask */
-	float scanco[3];		/* original scanline coordinate without jitter */
-	
-	int samplenr;			/* sample counter, to detect if we should do shadow again */
-	int depth;				/* 1 or larger on raytrace shading */
-	int volume_depth;		/* number of intersections through volumes */
-	
-	/* for strand shading, normal at the surface */
-	float surfnor[3], surfdist;
-
-	/* from initialize, part or renderlayer */
-	bool do_preview;		/* for nodes, in previewrender */
-	bool do_manage;			/* color management flag */
-	bool use_world_space_shading;
-	short thread, sample;	/* sample: ShadeSample array index */
-	short nodes;			/* indicate node shading, temp hack to prevent recursion */
-	
-	unsigned int lay;
-	int layflag, passflag, combinedflag;
-	short object_pass_index;
-
-#ifdef RE_RAYCOUNTER
-	RayCounter raycounter;
-#endif
-	
-} ShadeInput;
-
 typedef struct BakeImBufuserData {
 	float *displacement_buffer;
 	char *mask_buffer;
@@ -212,46 +70,6 @@ int multitex_ext(struct Tex *tex,
 int multitex_ext_safe(struct Tex *tex, float texvec[3], struct TexResult *texres, struct ImagePool *pool, bool scene_color_manage, const bool skip_load_image);
 /* only for internal node usage */
 int multitex_nodes(struct Tex *tex, float texvec[3], float dxt[3], float dyt[3], int osatex, struct TexResult *texres,
-                   const short thread, short which_output, struct ShadeInput *shi, struct MTex *mtex,
-                   struct ImagePool *pool);
-float RE_lamp_get_data(struct ShadeInput *shi, struct Object *lamp_obj, float col[4], float lv[3], float *dist, float shadow[4]);
-void RE_instance_get_particle_info(struct ObjectInstanceRen *obi, float *index, float *random, float *age, float *lifetime, float co[3], float *size, float vel[3], float angvel[3]);
-
-float RE_fresnel_dielectric(float incoming[3], float normal[3], float eta);
-
-/* shaded view and bake */
-struct Render;
-struct Image;
-
-int RE_bake_shade_all_selected(struct Render *re, int type, struct Object *actob, short *do_update, float *progress);
-struct Image *RE_bake_shade_get_image(void);
-void RE_bake_ibuf_filter(struct ImBuf *ibuf, char *mask, const int filter);
-void RE_bake_ibuf_normalize_displacement(struct ImBuf *ibuf, float *displacement, char *mask, float displacement_min, float displacement_max);
-float RE_bake_make_derivative(struct ImBuf *ibuf, float *heights_buffer, const char *mask,
-                              const float height_min, const float height_max,
-                              const float fmult);
-
-enum {
-	RE_OBJECT_INSTANCE_MATRIX_OB,
-	RE_OBJECT_INSTANCE_MATRIX_OBINV,
-	RE_OBJECT_INSTANCE_MATRIX_LOCALTOVIEW,
-	RE_OBJECT_INSTANCE_MATRIX_LOCALTOVIEWINV,
-};
-
-const float (*RE_object_instance_get_matrix(struct ObjectInstanceRen *obi, int matrix_id))[4];
-
-float RE_object_instance_get_object_pass_index(struct ObjectInstanceRen *obi);
-float RE_object_instance_get_random_id(struct ObjectInstanceRen *obi);
-
-enum {
-	RE_VIEW_MATRIX,
-	RE_VIEWINV_MATRIX,
-};
-
-const float (*RE_render_current_get_matrix(int matrix_id))[4];
-
-#define BAKE_RESULT_OK			0
-#define BAKE_RESULT_NO_OBJECTS		1
-#define BAKE_RESULT_FEEDBACK_LOOP	2
+                   const short thread, short which_output, struct MTex *mtex, struct ImagePool *pool);
 
 #endif /* __RE_SHADER_EXT_H__ */