Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/blenkernel/BKE_multires.hh

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+/* SPDX-FileCopyrightText: 2007 by Nicholas Bishop. All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+/** \file
+ * \ingroup bke
+ */
+
+#include "BLI_array.hh"
+#include "BLI_enum_flags.hh"
+#include "BLI_math_matrix_types.hh"
+
+namespace blender {
+
+struct Depsgraph;
+struct MDisps;
+struct Mesh;
+struct ModifierData;
+struct MultiresModifierData;
+struct Object;
+struct ReportList;
+struct Scene;
+struct SubdivCCG;
+namespace bke::subdiv {
+struct Settings;
+struct ToMeshSettings;
+}  // namespace bke::subdiv
+
+enum MultiresModifiedFlags {
+  /* indicates the grids have been sculpted on, so MDisps
+   * have to be updated */
+  MULTIRES_COORDS_MODIFIED = 1,
+  /* indicates elements have been hidden or unhidden */
+  MULTIRES_HIDDEN_MODIFIED = 2,
+};
+
+/**
+ * Delete mesh mdisps and grid paint masks.
+ */
+void multires_customdata_delete(Mesh *mesh);
+
+void multires_set_tot_level(Object *ob, MultiresModifierData *mmd, int lvl);
+
+void multires_mark_as_modified(Depsgraph *depsgraph, Object *object, MultiresModifiedFlags flags);
+
+void multires_flush_sculpt_updates(Object *object);
+void multires_force_sculpt_rebuild(Object *object);
+void multires_force_external_reload(Object *object);
+
+/**
+ * Reset the multi-res levels to match the number of mdisps.
+ */
+void multiresModifier_set_levels_from_disps(MultiresModifierData *mmd, Object *ob);
+
+enum class MultiresFlags : uint8_t {
+  UseLocalMMD = 1,
+  UseRenderParams = 2,
+  AllocPaintMask = 4,
+  IgnoreSimplify = 8,
+};
+ENUM_OPERATORS(MultiresFlags);
+
+MultiresModifierData *find_multires_modifier_before(Scene *scene, ModifierData *lastmd);
+/**
+ * used for applying scale on mdisps layer and syncing subdivide levels when joining objects.
+ * \param use_first: return first multi-res modifier if all multi-res'es are disabled.
+ */
+MultiresModifierData *get_multires_modifier(Scene *scene, Object *ob, bool use_first);
+int multires_get_level(const Scene *scene,
+                       const Object *ob,
+                       const MultiresModifierData *mmd,
+                       bool render,
+                       bool ignore_simplify);
+
+/**
+ * Creates mesh with multi-res modifier applied on current object's deform mesh.
+ */
+Mesh *BKE_multires_create_mesh(Depsgraph *depsgraph, Object *object, MultiresModifierData *mmd);
+
+/**
+ * Get coordinates of a deformed base mesh which is an input to the given multi-res modifier.
+ * \note The modifiers will be re-evaluated.
+ */
+Array<float3> BKE_multires_create_deformed_base_mesh_vert_coords(Depsgraph *depsgraph,
+                                                                 Object *object,
+                                                                 MultiresModifierData *mmd);
+
+/**
+ * \param direction: 1 for delete higher, 0 for lower (not implemented yet).
+ */
+void multiresModifier_del_levels(MultiresModifierData *mmd,
+                                 Scene *scene,
+                                 Object *object,
+                                 int direction);
+
+enum class ApplyBaseMode : int8_t {
+  Base,
+  ForSubdivision,
+};
+
+/**
+ * Use when un-subdivide has *partial* success,
+ * report issues to the user as warnings since an "error" implies
+ * failure which is handled separately.
+ */
+struct MultiresUnsubdivideInfo {
+  /** When over zero report that some data was not preserved. */
+  int unsupported_grid_count = 0;
+};
+
+void multiresModifier_base_apply(Depsgraph *depsgraph,
+                                 Object *object,
+                                 MultiresModifierData *mmd,
+                                 ApplyBaseMode mode);
+int multiresModifier_rebuild_subdiv(Depsgraph *depsgraph,
+                                    Object *object,
+                                    MultiresModifierData *mmd,
+                                    int rebuild_limit,
+                                    bool switch_view_to_lower_level,
+                                    MultiresUnsubdivideInfo &info);
+
+void multiresModifier_unsubdivide_report_if_needed(const MultiresUnsubdivideInfo &info,
+                                                   ReportList *reports);
+
+/**
+ * If `ob_src` and `ob_dst` both have multi-res modifiers,
+ * synchronize them such that `ob_dst` has the same total number of levels as `ob_src`.
+ */
+void multiresModifier_sync_levels_ex(Object *ob_dst,
+                                     const MultiresModifierData *mmd_src,
+                                     MultiresModifierData *mmd_dst);
+
+void multires_stitch_grids(Object *);
+
+void multiresModifier_scale_disp(Depsgraph *depsgraph, Scene *scene, Object *ob);
+void multiresModifier_prepare_join(Depsgraph *depsgraph, Scene *scene, Object *ob, Object *to_ob);
+
+int multires_mdisp_corners(const MDisps *s);
+
+/**
+ * Update multi-res data after topology changing.
+ */
+void multires_topology_changed(Mesh *mesh);
+
+/**
+ * Makes sure data from an external file is fully read.
+ *
+ * Since the multi-res data files only contain displacement vectors without knowledge about
+ * subdivision level some extra work is needed. Namely make is to all displacement grids have
+ * proper level and number of displacement vectors set.
+ */
+void multires_ensure_external_read(Mesh *mesh, int top_level);
+void multiresModifier_ensure_external_read(Mesh *mesh, const MultiresModifierData *mmd);
+
+/**** interpolation stuff ****/
+/* Adapted from `sculptmode.c` */
+
+void old_mdisps_bilinear(float out[3], float (*disps)[3], int st, float u, float v);
+
+/* Reshaping, define in multires_reshape.cc */
+/**
+ * Returns truth on success, false otherwise.
+ *
+ * This function might fail in cases like source and destination not having
+ * matched amount of vertices.
+ */
+bool multiresModifier_reshapeFromObject(Depsgraph *depsgraph,
+                                        MultiresModifierData *mmd,
+                                        Object *dst,
+                                        Object *src);
+bool multiresModifier_reshapeFromDeformModifier(Depsgraph *depsgraph,
+                                                Object *ob,
+                                                MultiresModifierData *mmd,
+                                                ModifierData *deform_md);
+bool multiresModifier_reshapeFromCCG(int tot_level, Mesh *coarse_mesh, SubdivCCG *subdiv_ccg);
+
+/* Subdivide multi-res displacement once. */
+
+enum class MultiresSubdivideModeType : int8_t {
+  CatmullClark,
+  Simple,
+  Linear,
+};
+
+void multiresModifier_subdivide(Object *object,
+                                MultiresModifierData *mmd,
+                                MultiresSubdivideModeType mode);
+void multires_subdivide_create_tangent_displacement_linear_grids(Object *object,
+                                                                 MultiresModifierData *mmd);
+
+/**
+ * Subdivide displacement to the given level.
+ * If level is lower than the current top level nothing happens.
+ */
+void multiresModifier_subdivide_to_level(Object *object,
+                                         MultiresModifierData *mmd,
+                                         int top_level,
+                                         MultiresSubdivideModeType mode);
+
+/* Subdivision integration, defined in multires_subdiv.cc */
+
+void BKE_multires_subdiv_settings_init(bke::subdiv::Settings *settings,
+                                       const MultiresModifierData *mmd);
+
+/* TODO(sergey): Replace this set of boolean flags with bitmask. */
+void BKE_multires_subdiv_mesh_settings_init(bke::subdiv::ToMeshSettings *mesh_settings,
+                                            const Scene *scene,
+                                            const Object *object,
+                                            const MultiresModifierData *mmd,
+                                            bool use_render_params,
+                                            bool ignore_simplify,
+                                            bool ignore_control_edges);
+
+/* General helpers. */
+
+/**
+ * For a given partial derivatives of a PTEX face get tangent matrix for displacement.
+ *
+ * Corner needs to be known to properly "rotate" partial derivatives when the
+ * matrix is being constructed for quad. For non-quad the corner is to be set to 0.
+ */
+BLI_INLINE void BKE_multires_construct_tangent_matrix(float3x3 &tangent_matrix,
+                                                      const float3 &dPdu,
+                                                      const float3 &dPdv,
+                                                      int corner);
+
+/* Versioning. */
+
+/**
+ * Convert displacement which is stored for simply-subdivided mesh to a Catmull-Clark
+ * subdivided mesh.
+ */
+void multires_do_versions_simple_to_catmull_clark(Object *object, MultiresModifierData *mmd);
+
+}  // namespace blender
+
+#include "intern/multires_inline.hh"  // IWYU pragma: export