diff options
Diffstat (limited to 'source/blender/draw/intern/draw_cache_impl_displist.c')
| -rw-r--r-- | source/blender/draw/intern/draw_cache_impl_displist.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/source/blender/draw/intern/draw_cache_impl_displist.c b/source/blender/draw/intern/draw_cache_impl_displist.c new file mode 100644 index 00000000000..e051d61d056 --- /dev/null +++ b/source/blender/draw/intern/draw_cache_impl_displist.c @@ -0,0 +1,170 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2017 by Blender Foundation. + * All rights reserved. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file draw_cache_impl_displist.c + * \ingroup draw + * + * \brief DispList API for render engines + * + * \note DispList may be removed soon! This is a utility for object types that use render. + */ + +#include "MEM_guardedalloc.h" + +#include "BLI_utildefines.h" +#include "BLI_math_vector.h" + +#include "DNA_curve_types.h" + +#include "BKE_displist.h" + +#include "GPU_batch.h" + +#include "draw_cache_impl.h" /* own include */ + +static int dl_vert_len(const DispList *dl) +{ + switch (dl->type) { + case DL_INDEX3: + case DL_INDEX4: + return dl->nr; + case DL_SURF: + return dl->parts * dl->nr; + } + return 0; +} + +static int dl_tri_len(const DispList *dl) +{ + switch (dl->type) { + case DL_INDEX3: + return dl->parts; + case DL_INDEX4: + return dl->parts * 2; + case DL_SURF: + return dl->totindex * 2; + } + return 0; +} + +/* see: displist_get_allverts */ +static int curve_render_surface_vert_len_get(const ListBase *lb) +{ + int vert_len = 0; + for (const DispList *dl = lb->first; dl; dl = dl->next) { + vert_len += dl_vert_len(dl); + } + return vert_len; +} + +static int curve_render_surface_tri_len_get(const ListBase *lb) +{ + int tri_len = 0; + for (const DispList *dl = lb->first; dl; dl = dl->next) { + tri_len += dl_tri_len(dl); + } + return tri_len; +} + +Gwn_Batch *BLI_displist_batch_calc_surface(ListBase *lb) +{ + const int tri_len = curve_render_surface_tri_len_get(lb); + if (tri_len == 0) { + return NULL; + } + + static Gwn_VertFormat format = { 0 }; + static struct { uint pos, nor; } attr_id; + if (format.attrib_ct == 0) { + /* initialize vertex format */ + attr_id.pos = GWN_vertformat_attr_add(&format, "pos", GWN_COMP_F32, 3, GWN_FETCH_FLOAT); + attr_id.nor = GWN_vertformat_attr_add(&format, "nor", GWN_COMP_F32, 3, GWN_FETCH_FLOAT); + } + + const int vert_len = curve_render_surface_vert_len_get(lb); + Gwn_VertBuf *vbo = GWN_vertbuf_create_with_format(&format); + { + const int vbo_len_capacity = vert_len; + int vbo_len_used = 0; + GWN_vertbuf_data_alloc(vbo, vbo_len_capacity); + + BKE_displist_normals_add(lb); + + for (const DispList *dl = lb->first; dl; dl = dl->next) { + const bool ndata_is_single = dl->type == DL_INDEX3; + if (ELEM(dl->type, DL_INDEX3, DL_INDEX4, DL_SURF)) { + const float *fp_co = dl->verts; + const float *fp_no = dl->nors; + const int vbo_end = vbo_len_used + dl_vert_len(dl); + while (vbo_len_used < vbo_end) { + GWN_vertbuf_attr_set(vbo, attr_id.pos, vbo_len_used, fp_co); + if (fp_no) { + GWN_vertbuf_attr_set(vbo, attr_id.nor, vbo_len_used, fp_no); + if (ndata_is_single == false) { + fp_no += 3; + } + } + fp_co += 3; + vbo_len_used += 1; + } + } + } + } + + { + Gwn_IndexBufBuilder elb; + GWN_indexbuf_init(&elb, GWN_PRIM_TRIS, tri_len, vert_len); + + int ofs = 0; + int tri_len_used = 0; + for (const DispList *dl = lb->first; dl; dl = dl->next) { + if (ELEM(dl->type, DL_INDEX3, DL_INDEX4, DL_SURF)) { + if (dl->type == DL_INDEX3) { + const int *idx = dl->index; + const int i_end = dl->parts; + for (int i = 0; i < i_end; i++) { + GWN_indexbuf_add_tri_verts(&elb, idx[0] + ofs, idx[1] + ofs, idx[2] + ofs); + tri_len_used += 1; + idx += 3; + } + } + else if (ELEM(dl->type, DL_INDEX4, DL_SURF)) { + const int *idx = dl->index; + const int i_end = dl->totindex; + for (int i = 0; i < i_end; i++) { + GWN_indexbuf_add_tri_verts(&elb, idx[0] + ofs, idx[1] + ofs, idx[2] + ofs); + tri_len_used += 1; + GWN_indexbuf_add_tri_verts(&elb, idx[0] + ofs, idx[2] + ofs, idx[3] + ofs); + tri_len_used += 1; + idx += 4; + } + } + ofs += dl_vert_len(dl); + } + } + + return GWN_batch_create_ex( + GWN_PRIM_TRIS, vbo, GWN_indexbuf_build(&elb), + GWN_BATCH_OWNS_VBO | GWN_BATCH_OWNS_INDEX); + } +} |