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, 1 insertions, 132 deletions

diff --git a/source/blender/blenkernel/BKE_DerivedMesh.h b/source/blender/blenkernel/BKE_DerivedMesh.h
index b038559e717..74416bcd18f 100644
--- a/source/blender/blenkernel/BKE_DerivedMesh.h
+++ b/source/blender/blenkernel/BKE_DerivedMesh.h
@@ -97,7 +97,6 @@ struct MCol;
 struct ColorBand;
 struct Depsgraph;
 struct GPUVertexAttribs;
-struct GPUDrawObject;
 struct PBVH;
 
 /* number of sub-elements each mesh element has (for interpolation) */
@@ -127,34 +126,6 @@ typedef enum DerivedMeshType {
 	DM_TYPE_CCGDM
 } DerivedMeshType;
 
-typedef enum DMDrawOption {
-	/* the element is hidden or otherwise non-drawable */
-	DM_DRAW_OPTION_SKIP = 0,
-	/* normal drawing */
-	DM_DRAW_OPTION_NORMAL = 1,
-	/* draw, but don't set the color from mcol */
-	DM_DRAW_OPTION_NO_MCOL = 2,
-	/* used in drawMappedFaces, use GL stipple for the face */
-	DM_DRAW_OPTION_STIPPLE = 3,
-} DMDrawOption;
-
-/* Drawing callback types */
-typedef int (*DMSetMaterial)(int mat_nr, void *attribs);
-typedef int (*DMCompareDrawOptions)(void *userData, int cur_index, int next_index);
-typedef void (*DMSetDrawInterpOptions)(void *userData, int index, float t);
-typedef DMDrawOption (*DMSetDrawOptions)(void *userData, int index);
-
-typedef enum DMDrawFlag {
-	DM_DRAW_USE_COLORS          = (1 << 0),
-	DM_DRAW_ALWAYS_SMOOTH       = (1 << 1),
-	DM_DRAW_USE_ACTIVE_UV       = (1 << 2),
-	DM_DRAW_USE_TEXPAINT_UV     = (1 << 3),
-	DM_DRAW_SKIP_HIDDEN         = (1 << 4),
-	DM_DRAW_SKIP_SELECT         = (1 << 5),
-	DM_DRAW_SELECT_USE_EDITMODE = (1 << 6),
-	DM_DRAW_NEED_NORMALS        = (1 << 7)
-} DMDrawFlag;
-
 typedef enum DMForeachFlag {
 	DM_FOREACH_NOP = 0,
 	DM_FOREACH_USE_NORMAL = (1 << 0),  /* foreachMappedVert, foreachMappedLoop, foreachMappedFaceCenter */
@@ -163,14 +134,9 @@ typedef enum DMForeachFlag {
 typedef enum DMDirtyFlag {
 	/* dm has valid tessellated faces, but tessellated CDDATA need to be updated. */
 	DM_DIRTY_TESS_CDLAYERS = 1 << 0,
-	/* One of the MCOL layers have been updated, force updating of GPUDrawObject's colors buffer.
-	 * This is necessary with modern, VBO draw code, as e.g. in vpaint mode me->mcol may be updated
-	 * without actually rebuilding dm (hence by default keeping same GPUDrawObject, and same colors
-	 * buffer, which prevents update during a stroke!). */
-	DM_DIRTY_MCOL_UPDATE_DRAW = 1 << 1,
 
 	/* check this with modifier dependsOnNormals callback to see if normals need recalculation */
-	DM_DIRTY_NORMALS = 1 << 2,
+	DM_DIRTY_NORMALS = 1 << 1,
 }  DMDirtyFlag;
 
 typedef struct DerivedMesh DerivedMesh;
@@ -181,9 +147,7 @@ struct DerivedMesh {
 	int needsFree; /* checked on ->release, is set to 0 for cached results */
 	int deformedOnly; /* set by modifier stack if only deformed from original */
 	BVHCache *bvhCache;
-	struct GPUDrawObject *drawObject;
 	DerivedMeshType type;
-	float auto_bump_scale;
 	DMDirtyFlag dirty;
 	int totmat; /* total materials. Will be valid only before object drawing. */
 	struct Material **mat; /* material array. Will be valid only before object drawing */
@@ -383,98 +347,6 @@ struct DerivedMesh {
 	 */
 	struct PBVH *(*getPBVH)(struct Object *ob, DerivedMesh *dm);
 
-	/* Drawing Operations */
-
-	/** Draw all vertices as bgl points (no options) */
-	void (*drawVerts)(DerivedMesh *dm);
-
-	/** Draw all edges as lines (no options)
-	 *
-	 * Also called for *final* editmode DerivedMeshes
-	 */
-	void (*drawEdges)(DerivedMesh *dm, bool drawLooseEdges, bool drawAllEdges);
-	
-	/** Draw all loose edges (edges w/ no adjoining faces) */
-	void (*drawLooseEdges)(DerivedMesh *dm);
-
-	/** Draw all faces
-	 *  o Set face normal or vertex normal based on inherited face flag
-	 *  o Use inherited face material index to call setMaterial
-	 *  o Only if setMaterial returns true
-	 *
-	 * Also called for *final* editmode DerivedMeshes
-	 */
-	void (*drawFacesSolid)(DerivedMesh *dm, float (*partial_redraw_planes)[4],
-	                       bool fast, DMSetMaterial setMaterial);
-
-	/** Draw all faces with GLSL materials
-	 *  o setMaterial is called for every different material nr
-	 *  o Only if setMaterial returns true
-	 */
-	void (*drawFacesGLSL)(DerivedMesh *dm, DMSetMaterial setMaterial);
-
-	/** Draw mapped faces (no color, or texture)
-	 * - Only if !setDrawOptions or
-	 *   setDrawOptions(userData, mapped-face-index, r_drawSmooth)
-	 *   returns true
-	 *
-	 * If drawSmooth is set to true then vertex normals should be set and
-	 * glShadeModel called with GL_SMOOTH. Otherwise the face normal should
-	 * be set and glShadeModel called with GL_FLAT.
-	 *
-	 * The setDrawOptions is allowed to not set drawSmooth (for example, when
-	 * lighting is disabled), in which case the implementation should draw as
-	 * smooth shaded.
-	 */
-	void (*drawMappedFaces)(DerivedMesh *dm,
-	                        DMSetDrawOptions setDrawOptions,
-	                        DMSetMaterial setMaterial,
-	                        DMCompareDrawOptions compareDrawOptions,
-	                        void *userData,
-	                        DMDrawFlag flag);
-
-	/** Draw mapped faces with GLSL materials
-	 * - setMaterial is called for every different material nr
-	 * - setDrawOptions is called for every face
-	 * - Only if setMaterial and setDrawOptions return true
-	 */
-	void (*drawMappedFacesGLSL)(DerivedMesh *dm,
-	                            DMSetMaterial setMaterial,
-	                            DMSetDrawOptions setDrawOptions,
-	                            void *userData);
-
-	/** Draw mapped edges as lines
-	 * - Only if !setDrawOptions or setDrawOptions(userData, mapped-edge)
-	 *   returns true
-	 */
-	void (*drawMappedEdges)(DerivedMesh *dm,
-	                        DMSetDrawOptions setDrawOptions,
-	                        void *userData);
-
-	/** Draw mapped edges as lines with interpolation values
-	 * - Only if !setDrawOptions or
-	 *   setDrawOptions(userData, mapped-edge, mapped-v0, mapped-v1, t)
-	 *   returns true
-	 *
-	 * NOTE: This routine is optional!
-	 */
-	void (*drawMappedEdgesInterp)(DerivedMesh *dm, 
-	                              DMSetDrawOptions setDrawOptions,
-	                              DMSetDrawInterpOptions setDrawInterpOptions,
-	                              void *userData);
-
-	/** Draw all faces with materials
-	 * - setMaterial is called for every different material nr
-	 * - setFace is called to verify if a face must be hidden
-	 */
-	void (*drawMappedFacesMat)(DerivedMesh *dm,
-	                           void (*setMaterial)(void *userData, int matnr, void *attribs),
-	                           bool (*setFace)(void *userData, int index), void *userData);
-
-	struct GPUDrawObject *(*gpuObjectNew)(DerivedMesh *dm);
-	void (*copy_gpu_data)(DerivedMesh *dm, int type, void *varray_p,
-	                      const int *mat_orig_to_new, const void *user_data);
-
 	/** Release reference to the DerivedMesh. This function decides internally
 	 * if the DerivedMesh will be freed, or cached for later use. */
 	void (*release)(DerivedMesh *dm);
@@ -756,9 +628,6 @@ void DM_vertex_attributes_from_gpu(
         DerivedMesh *dm,
         struct GPUVertexAttribs *gattribs, DMVertexAttribs *attribs);
 
-void DM_draw_attrib_vertex(DMVertexAttribs *attribs, int a, int index, int vert, int loop);
-void DM_draw_attrib_vertex_uniforms(const DMVertexAttribs *attribs);
-
 void DM_calc_tangents_names_from_gpu(
         const struct GPUVertexAttribs *gattribs,
         char (*tangent_names)[MAX_NAME], int *tangent_names_count);