Curves: Split curve EEVEE/workbench functions from particle hair

The GPU evaluation for curves will have to change significantly from the
current particle hair drawing code, due to its more general use cases
and support for more curve types. To simplify that process and avoid
introducing regressions for the rendering of hair particle systems,
this commit splits drawing functions for the curves object and
particle hair.

The changes are just inlining of functions and copying code
where necessary.

Differential Revision: https://developer.blender.org/D14576

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/draw/intern/draw_common.h b/source/blender/draw/intern/draw_common.h
index 34b930ae9c8..d302140d9ac 100644
--- a/source/blender/draw/intern/draw_common.h
+++ b/source/blender/draw/intern/draw_common.h
@@ -53,12 +53,17 @@ struct DRWShadingGroup *DRW_shgroup_hair_create_sub(struct Object *object,
                                                     struct ModifierData *md,
                                                     struct DRWShadingGroup *shgrp,
                                                     struct GPUMaterial *gpu_material);
+
+struct DRWShadingGroup *DRW_shgroup_curves_create_sub(struct Object *object,
+                                                      struct DRWShadingGroup *shgrp,
+                                                      struct GPUMaterial *gpu_material);
 /**
  * \note Only valid after #DRW_hair_update().
  */
 struct GPUVertBuf *DRW_hair_pos_buffer_get(struct Object *object,
                                            struct ParticleSystem *psys,
                                            struct ModifierData *md);
+struct GPUVertBuf *DRW_curves_pos_buffer_get(struct Object *object);
 void DRW_hair_duplimat_get(struct Object *object,
                            struct ParticleSystem *psys,
                            struct ModifierData *md,