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/*
* 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.
*/
/** \file
* \ingroup draw
*
* \brief PointCloud API for render engines
*/
#include <string.h>
#include "MEM_guardedalloc.h"
#include "BLI_math_base.h"
#include "BLI_utildefines.h"
#include "DNA_object_types.h"
#include "DNA_pointcloud_types.h"
#include "BKE_pointcloud.h"
#include "GPU_batch.h"
#include "draw_cache_impl.h" /* own include */
static void pointcloud_batch_cache_clear(PointCloud *pointcloud);
/* ---------------------------------------------------------------------- */
/* PointCloud GPUBatch Cache */
typedef struct PointCloudBatchCache {
GPUVertBuf *pos;
GPUBatch *batch;
/* settings to determine if cache is invalid */
bool is_dirty;
} PointCloudBatchCache;
/* GPUBatch cache management. */
static bool pointcloud_batch_cache_valid(PointCloud *pointcloud)
{
PointCloudBatchCache *cache = pointcloud->batch_cache;
return (cache && cache->is_dirty == false);
}
static void pointcloud_batch_cache_init(PointCloud *pointcloud)
{
PointCloudBatchCache *cache = pointcloud->batch_cache;
if (!cache) {
cache = pointcloud->batch_cache = MEM_callocN(sizeof(*cache), __func__);
}
else {
memset(cache, 0, sizeof(*cache));
}
cache->is_dirty = false;
}
void DRW_pointcloud_batch_cache_validate(PointCloud *pointcloud)
{
if (!pointcloud_batch_cache_valid(pointcloud)) {
pointcloud_batch_cache_clear(pointcloud);
pointcloud_batch_cache_init(pointcloud);
}
}
static PointCloudBatchCache *pointcloud_batch_cache_get(PointCloud *pointcloud)
{
return pointcloud->batch_cache;
}
void DRW_pointcloud_batch_cache_dirty_tag(PointCloud *pointcloud, int mode)
{
PointCloudBatchCache *cache = pointcloud->batch_cache;
if (cache == NULL) {
return;
}
switch (mode) {
case BKE_POINTCLOUD_BATCH_DIRTY_ALL:
cache->is_dirty = true;
break;
default:
BLI_assert(0);
}
}
static void pointcloud_batch_cache_clear(PointCloud *pointcloud)
{
PointCloudBatchCache *cache = pointcloud->batch_cache;
if (!cache) {
return;
}
GPU_BATCH_DISCARD_SAFE(cache->batch);
GPU_VERTBUF_DISCARD_SAFE(cache->pos);
}
void DRW_pointcloud_batch_cache_free(PointCloud *pointcloud)
{
pointcloud_batch_cache_clear(pointcloud);
MEM_SAFE_FREE(pointcloud->batch_cache);
}
static void pointcloud_batch_cache_ensure_pos(Object *ob, PointCloudBatchCache *cache)
{
if (cache->pos != NULL) {
return;
}
PointCloud *pointcloud = ob->data;
static GPUVertFormat format = {0};
static uint pos_id;
static uint radius_id;
if (format.attr_len == 0) {
/* initialize vertex format */
pos_id = GPU_vertformat_attr_add(&format, "pointcloud_pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
radius_id = GPU_vertformat_attr_add(
&format, "pointcloud_radius", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
}
GPU_VERTBUF_DISCARD_SAFE(cache->pos);
cache->pos = GPU_vertbuf_create_with_format(&format);
GPU_vertbuf_data_alloc(cache->pos, pointcloud->totpoint);
GPU_vertbuf_attr_fill(cache->pos, pos_id, pointcloud->co);
if (pointcloud->radius) {
GPU_vertbuf_attr_fill(cache->pos, radius_id, pointcloud->radius);
}
else if (pointcloud->totpoint) {
/* TODO: optimize for constant radius by not including in vertex buffer at all? */
float *radius = MEM_malloc_arrayN(pointcloud->totpoint, sizeof(float), __func__);
for (int i = 0; i < pointcloud->totpoint; i++) {
/* TODO: add default radius to PointCloud data structure. */
radius[i] = 0.01f;
}
GPU_vertbuf_attr_fill(cache->pos, radius_id, radius);
MEM_freeN(radius);
}
}
GPUBatch *DRW_pointcloud_batch_cache_get_dots(Object *ob)
{
PointCloud *pointcloud = ob->data;
PointCloudBatchCache *cache = pointcloud_batch_cache_get(pointcloud);
if (cache->batch == NULL) {
pointcloud_batch_cache_ensure_pos(ob, cache);
cache->batch = GPU_batch_create(GPU_PRIM_POINTS, cache->pos, NULL);
}
return cache->batch;
}
int DRW_pointcloud_material_count_get(PointCloud *pointcloud)
{
return max_ii(1, pointcloud->totcol);
}
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