Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/opensubdiv/opensubdiv_evaluator.hh

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+/* SPDX-FileCopyrightText: 2018 Blender Foundation
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * Author: Sergey Sharybin. */
+
+#ifndef OPENSUBDIV_EVALUATOR_IMPL_H_
+#define OPENSUBDIV_EVALUATOR_IMPL_H_
+
+#ifdef _MSC_VER
+#  include <iso646.h>
+#endif
+
+#include <opensubdiv/far/patchMap.h>
+#include <opensubdiv/far/patchTable.h>
+
+#include "opensubdiv_capi_type.hh"
+
+#include "GPU_storage_buffer.hh"
+
+struct OpenSubdiv_EvaluatorCache;
+struct OpenSubdiv_EvaluatorSettings;
+struct OpenSubdiv_PatchCoord;
+namespace blender::gpu {
+class VertBuf;
+}
+namespace blender::opensubdiv {
+
+class TopologyRefinerImpl;
+class PatchMap;
+
+// Wrapper around implementation, which defines API which we are capable to
+// provide over the implementation.
+class EvalOutputAPI {
+ public:
+  // Anonymous forward declaration of actual evaluator implementation.
+  class EvalOutput;
+
+  // NOTE: PatchMap is not owned, only referenced.
+  EvalOutputAPI(EvalOutput *implementation, PatchMap *patch_map);
+
+  ~EvalOutputAPI();
+
+  // Set settings for data buffers.
+  void setSettings(const OpenSubdiv_EvaluatorSettings *settings);
+
+  // Set coarse positions from a continuous array of coordinates.
+  void setCoarsePositions(const float *positions,
+                          const int start_vertex_index,
+                          const int num_vertices);
+  // Set vertex data from a continuous array of data.
+  void setVertexData(const float *data, const int start_vertex_index, const int num_vertices);
+  // Set varying data from a continuous array of data.
+  void setVaryingData(const float *varying_data,
+                      const int start_vertex_index,
+                      const int num_vertices);
+  // Set face varying data from a continuous array of data.
+  //
+  // TODO(sergey): Find a better name for vertex here. It is not the vertex of
+  // geometry, but a vertex of UV map.
+  void setFaceVaryingData(const int face_varying_channel,
+                          const float *varying_data,
+                          const int start_vertex_index,
+                          const int num_vertices);
+
+  // Set coarse vertex position from a continuous memory buffer where
+  // first coordinate starts at offset of `start_offset` and there is `stride`
+  // bytes between adjacent vertex coordinates.
+  void setCoarsePositionsFromBuffer(const void *buffer,
+                                    const int start_offset,
+                                    const int stride,
+                                    const int start_vertex_index,
+                                    const int num_vertices);
+  // Set varying data from a continuous memory buffer where
+  // first coordinate starts at offset of `start_offset` and there is `stride`
+  // bytes between adjacent vertex coordinates.
+  void setVaryingDataFromBuffer(const void *buffer,
+                                const int start_offset,
+                                const int stride,
+                                const int start_vertex_index,
+                                const int num_vertices);
+  // Set face varying data from a continuous memory buffer where
+  // first coordinate starts at offset of `start_offset` and there is `stride`
+  // bytes between adjacent vertex coordinates.
+  //
+  // TODO(sergey): Find a better name for vertex here. It is not the vertex of
+  // geometry, but a vertex of UV map.
+  void setFaceVaryingDataFromBuffer(const int face_varying_channel,
+                                    const void *buffer,
+                                    const int start_offset,
+                                    const int stride,
+                                    const int start_vertex_index,
+                                    const int num_vertices);
+
+  // Refine after coarse positions update.
+  void refine();
+
+  // Evaluate given ptex face at given bilinear coordinate.
+  // If derivatives are NULL, they will not be evaluated.
+  void evaluateLimit(const int ptex_face_index,
+                     float face_u,
+                     float face_v,
+                     float P[3],
+                     float dPdu[3],
+                     float dPdv[3]);
+
+  // Evaluate varying data at a given bilinear coordinate of given ptex face.
+  void evaluateVertexData(const int ptex_face_index, float face_u, float face_v, float data[]);
+
+  // Evaluate varying data at a given bilinear coordinate of given ptex face.
+  void evaluateVarying(const int ptex_face_index, float face_u, float face_v, float varying[3]);
+
+  // Evaluate facee-varying data at a given bilinear coordinate of given
+  // ptex face.
+  void evaluateFaceVarying(const int face_varying_channel,
+                           const int ptex_face_index,
+                           float face_u,
+                           float face_v,
+                           float face_varying[2]);
+
+  // Batched evaluation of multiple input coordinates.
+
+  // Evaluate given ptex face at given bilinear coordinate.
+  // If derivatives are NULL, they will not be evaluated.
+  //
+  // NOTE: Output arrays must point to a memory of size float[3]*num_patch_coords.
+  void evaluatePatchesLimit(const OpenSubdiv_PatchCoord *patch_coords,
+                            const int num_patch_coords,
+                            float *P,
+                            float *dPdu,
+                            float *dPdv);
+
+  // Fill the output buffers and variables with data from the PatchMap.
+  void getPatchMap(blender::gpu::VertBuf *patch_map_handles,
+                   blender::gpu::VertBuf *patch_map_quadtree,
+                   int *min_patch_face,
+                   int *max_patch_face,
+                   int *max_depth,
+                   int *patches_are_triangular);
+
+  // Copy the patch arrays buffer used by OpenSubDiv for the source data to the given buffer.
+  gpu::StorageBuf *create_patch_arrays_buf();
+
+  // Wrap the patch index buffer used by OpenSubDiv for the source data with the given buffer.
+  gpu::StorageBuf *get_patch_index_buf();
+
+  // Wrap the patch param buffer used by OpenSubDiv for the source data with the given buffer.
+  gpu::StorageBuf *get_patch_param_buf();
+
+  // Wrap the buffer used by OpenSubDiv for the source data with the given buffer.
+  gpu::VertBuf *get_source_buf();
+
+  // Wrap the buffer used by OpenSubDiv for the extra source data with the given buffer.
+  gpu::VertBuf *get_source_data_buf();
+
+  // Copy the patch arrays buffer used by OpenSubDiv for the face varying channel with the given
+  // buffer.
+  gpu::StorageBuf *create_face_varying_patch_array_buf(const int face_varying_channel);
+
+  // Wrap the patch index buffer used by OpenSubDiv for the face varying channel with the given
+  // buffer.
+  gpu::StorageBuf *get_face_varying_patch_index_buf(const int face_varying_channel);
+
+  // Wrap the patch param buffer used by OpenSubDiv for the face varying channel with the given
+  // buffer.
+  gpu::StorageBuf *get_face_varying_patch_param_buf(const int face_varying_channel);
+
+  // Wrap thebuffer used by OpenSubDiv for the face varying channel with the given buffer.
+  gpu::VertBuf *get_face_varying_source_buf(const int face_varying_channel);
+  /** Get the source buffer offset for the given channel. */
+  int get_face_varying_source_offset(const int face_varying_channel) const;
+
+  // Return true if source vertex data has been set.
+  bool hasVertexData() const;
+
+ protected:
+  PatchMap *patch_map_;
+  EvalOutput *implementation_;
+};
+
+}  // namespace blender::opensubdiv
+
+struct OpenSubdiv_Evaluator {
+  blender::opensubdiv::EvalOutputAPI *eval_output;
+  const blender::opensubdiv::PatchMap *patch_map;
+  const OpenSubdiv::Far::PatchTable *patch_table;
+
+  eOpenSubdivEvaluator type;
+
+  OpenSubdiv_Evaluator();
+  ~OpenSubdiv_Evaluator();
+};
+
+OpenSubdiv_Evaluator *openSubdiv_createEvaluatorFromTopologyRefiner(
+    blender::opensubdiv::TopologyRefinerImpl *topology_refiner,
+    eOpenSubdivEvaluator evaluator_type,
+    OpenSubdiv_EvaluatorCache *evaluator_cache_descr);
+
+#endif  // OPENSUBDIV_EVALUATOR_IMPL_H_