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/*
* ***** 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_metaball.c
* \ingroup draw
*
* \brief MetaBall API for render engines
*/
#include "MEM_guardedalloc.h"
#include "BLI_utildefines.h"
#include "DNA_meta_types.h"
#include "DNA_object_types.h"
#include "BKE_curve.h"
#include "BKE_mball.h"
#include "GPU_batch.h"
#include "DRW_render.h"
#include "draw_cache_impl.h" /* own include */
static void metaball_batch_cache_clear(MetaBall *mb);
/* ---------------------------------------------------------------------- */
/* MetaBall GPUBatch Cache */
typedef struct MetaBallBatchCache {
GPUBatch *batch;
GPUBatch **shaded_triangles;
int mat_len;
/* Shared */
GPUVertBuf *pos_nor_in_order;
/* Wireframe */
struct {
GPUBatch *batch;
} face_wire;
/* settings to determine if cache is invalid */
bool is_dirty;
} MetaBallBatchCache;
/* GPUBatch cache management. */
static bool metaball_batch_cache_valid(MetaBall *mb)
{
MetaBallBatchCache *cache = mb->batch_cache;
if (cache == NULL) {
return false;
}
return cache->is_dirty == false;
}
static void metaball_batch_cache_init(MetaBall *mb)
{
MetaBallBatchCache *cache = mb->batch_cache;
if (!cache) {
cache = mb->batch_cache = MEM_mallocN(sizeof(*cache), __func__);
}
cache->batch = NULL;
cache->mat_len = 0;
cache->shaded_triangles = NULL;
cache->is_dirty = false;
cache->pos_nor_in_order = NULL;
cache->face_wire.batch = NULL;
}
static MetaBallBatchCache *metaball_batch_cache_get(MetaBall *mb)
{
if (!metaball_batch_cache_valid(mb)) {
metaball_batch_cache_clear(mb);
metaball_batch_cache_init(mb);
}
return mb->batch_cache;
}
void DRW_mball_batch_cache_dirty_tag(MetaBall *mb, int mode)
{
MetaBallBatchCache *cache = mb->batch_cache;
if (cache == NULL) {
return;
}
switch (mode) {
case BKE_MBALL_BATCH_DIRTY_ALL:
cache->is_dirty = true;
break;
default:
BLI_assert(0);
}
}
static void metaball_batch_cache_clear(MetaBall *mb)
{
MetaBallBatchCache *cache = mb->batch_cache;
if (!cache) {
return;
}
GPU_BATCH_DISCARD_SAFE(cache->face_wire.batch);
GPU_BATCH_DISCARD_SAFE(cache->batch);
GPU_VERTBUF_DISCARD_SAFE(cache->pos_nor_in_order);
/* Note: shaded_triangles[0] is already freed by cache->batch */
MEM_SAFE_FREE(cache->shaded_triangles);
cache->mat_len = 0;
}
void DRW_mball_batch_cache_free(MetaBall *mb)
{
metaball_batch_cache_clear(mb);
MEM_SAFE_FREE(mb->batch_cache);
}
static GPUVertBuf *mball_batch_cache_get_pos_and_normals(Object *ob, MetaBallBatchCache *cache)
{
if (cache->pos_nor_in_order == NULL) {
ListBase *lb = &ob->runtime.curve_cache->disp;
cache->pos_nor_in_order = MEM_callocN(sizeof(GPUVertBuf), __func__);
DRW_displist_vertbuf_create_pos_and_nor(lb, cache->pos_nor_in_order);
}
return cache->pos_nor_in_order;
}
/* -------------------------------------------------------------------- */
/** \name Public Object/MetaBall API
* \{ */
GPUBatch *DRW_metaball_batch_cache_get_triangles_with_normals(Object *ob)
{
if (!BKE_mball_is_basis(ob)) {
return NULL;
}
MetaBall *mb = ob->data;
MetaBallBatchCache *cache = metaball_batch_cache_get(mb);
if (cache->batch == NULL) {
ListBase *lb = &ob->runtime.curve_cache->disp;
GPUIndexBuf *ibo = MEM_callocN(sizeof(GPUIndexBuf), __func__);
DRW_displist_indexbuf_create_triangles_in_order(lb, ibo);
cache->batch = GPU_batch_create_ex(
GPU_PRIM_TRIS,
mball_batch_cache_get_pos_and_normals(ob, cache),
ibo,
GPU_BATCH_OWNS_INDEX);
}
return cache->batch;
}
GPUBatch **DRW_metaball_batch_cache_get_surface_shaded(Object *ob, MetaBall *mb, struct GPUMaterial **UNUSED(gpumat_array), uint gpumat_array_len)
{
if (!BKE_mball_is_basis(ob)) {
return NULL;
}
MetaBallBatchCache *cache = metaball_batch_cache_get(mb);
if (cache->shaded_triangles == NULL) {
cache->mat_len = gpumat_array_len;
cache->shaded_triangles = MEM_callocN(sizeof(*cache->shaded_triangles) * cache->mat_len, __func__);
cache->shaded_triangles[0] = DRW_metaball_batch_cache_get_triangles_with_normals(ob);
for (int i = 1; i < cache->mat_len; ++i) {
cache->shaded_triangles[i] = NULL;
}
}
return cache->shaded_triangles;
}
GPUBatch *DRW_metaball_batch_cache_get_wireframes_face(Object *ob)
{
if (!BKE_mball_is_basis(ob)) {
return NULL;
}
MetaBall *mb = ob->data;
MetaBallBatchCache *cache = metaball_batch_cache_get(mb);
if (cache->face_wire.batch == NULL) {
ListBase *lb = &ob->runtime.curve_cache->disp;
GPUVertBuf *vbo_pos_nor = MEM_callocN(sizeof(GPUVertBuf), __func__);
GPUVertBuf *vbo_wireframe_data = MEM_callocN(sizeof(GPUVertBuf), __func__);
DRW_displist_vertbuf_create_pos_and_nor_and_uv_tess(lb, vbo_pos_nor, NULL);
DRW_displist_vertbuf_create_wireframe_data_tess(lb, vbo_wireframe_data);
cache->face_wire.batch = GPU_batch_create_ex(GPU_PRIM_TRIS, vbo_pos_nor, NULL, GPU_BATCH_OWNS_VBO);
GPU_batch_vertbuf_add_ex(cache->face_wire.batch, vbo_wireframe_data, true);
}
return cache->face_wire.batch;
}
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