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/*
* Copyright 2017, Blender Foundation.
*
* 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.
*
* Contributor(s): Antonio Vazquez
*
*/
/** \file blender/draw/engines/gpencil/gpencil_cache_utils.c
* \ingroup draw
*/
#include "DRW_engine.h"
#include "DRW_render.h"
#include "ED_gpencil.h"
#include "ED_view3d.h"
#include "DNA_gpencil_types.h"
#include "DNA_view3d_types.h"
#include "BKE_gpencil.h"
#include "gpencil_engine.h"
#include "draw_cache_impl.h"
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
/* add a gpencil object to cache to defer drawing */
tGPencilObjectCache *gpencil_object_cache_add(
tGPencilObjectCache *cache_array, Object *ob,
int *gp_cache_size, int *gp_cache_used)
{
const DRWContextState *draw_ctx = DRW_context_state_get();
tGPencilObjectCache *cache_elem = NULL;
RegionView3D *rv3d = draw_ctx->rv3d;
tGPencilObjectCache *p = NULL;
/* By default a cache is created with one block with a predefined number of free slots,
if the size is not enough, the cache is reallocated adding a new block of free slots.
This is done in order to keep cache small */
if (*gp_cache_used + 1 > *gp_cache_size) {
if ((*gp_cache_size == 0) || (cache_array == NULL)) {
p = MEM_callocN(sizeof(struct tGPencilObjectCache) * GP_CACHE_BLOCK_SIZE, "tGPencilObjectCache");
*gp_cache_size = GP_CACHE_BLOCK_SIZE;
}
else {
*gp_cache_size += GP_CACHE_BLOCK_SIZE;
p = MEM_recallocN(cache_array, sizeof(struct tGPencilObjectCache) * *gp_cache_size);
}
cache_array = p;
}
/* zero out all pointers */
cache_elem = &cache_array[*gp_cache_used];
memset(cache_elem, 0, sizeof(*cache_elem));
Object *ob_orig = (Object *)DEG_get_original_id(&ob->id);
cache_elem->ob = ob_orig;
cache_elem->gpd = (bGPdata *)ob_orig->data;
copy_v3_v3(cache_elem->loc, ob->loc);
copy_m4_m4(cache_elem->obmat, ob->obmat);
cache_elem->idx = *gp_cache_used;
/* object is duplicated (particle) */
cache_elem->is_dup_ob = ob->base_flag & BASE_FROMDUPLI;
/* save FXs */
cache_elem->pixfactor = cache_elem->gpd->pixfactor;
cache_elem->shader_fx = ob_orig->shader_fx;
cache_elem->init_grp = NULL;
cache_elem->end_grp = NULL;
/* calculate zdepth from point of view */
float zdepth = 0.0;
if (rv3d) {
if (rv3d->is_persp) {
zdepth = ED_view3d_calc_zfac(rv3d, ob->loc, NULL);
}
else {
zdepth = -dot_v3v3(rv3d->viewinv[2], ob->loc);
}
}
else {
/* In render mode, rv3d is not available, so use the distance to camera.
* The real distance is not important, but the relative distance to the camera plane
* in order to sort by z_depth of the objects
*/
float vn[3] = { 0.0f, 0.0f, -1.0f }; /* always face down */
float plane_cam[4];
struct Object *camera = draw_ctx->scene->camera;
if (camera) {
mul_m4_v3(camera->obmat, vn);
normalize_v3(vn);
plane_from_point_normal_v3(plane_cam, camera->loc, vn);
zdepth = dist_squared_to_plane_v3(ob->loc, plane_cam);
}
}
cache_elem->zdepth = zdepth;
/* increase slots used in cache */
(*gp_cache_used)++;
return cache_array;
}
/* add a shading group to the cache to create later */
GpencilBatchGroup *gpencil_group_cache_add(
GpencilBatchGroup *cache_array,
bGPDlayer *gpl, bGPDframe *gpf, bGPDstroke *gps,
const short type, const bool onion,
const int vertex_idx,
int *grp_size, int *grp_used)
{
GpencilBatchGroup *cache_elem = NULL;
GpencilBatchGroup *p = NULL;
/* By default a cache is created with one block with a predefined number of free slots,
if the size is not enough, the cache is reallocated adding a new block of free slots.
This is done in order to keep cache small */
if (*grp_used + 1 > *grp_size) {
if ((*grp_size == 0) || (cache_array == NULL)) {
p = MEM_callocN(sizeof(struct GpencilBatchGroup) * GPENCIL_GROUPS_BLOCK_SIZE, "GpencilBatchGroup");
*grp_size = GPENCIL_GROUPS_BLOCK_SIZE;
}
else {
*grp_size += GPENCIL_GROUPS_BLOCK_SIZE;
p = MEM_recallocN(cache_array, sizeof(struct GpencilBatchGroup) * *grp_size);
}
cache_array = p;
}
/* zero out all data */
cache_elem = &cache_array[*grp_used];
memset(cache_elem, 0, sizeof(*cache_elem));
cache_elem->gpl = gpl;
cache_elem->gpf = gpf;
cache_elem->gps = gps;
cache_elem->type = type;
cache_elem->onion = onion;
cache_elem->vertex_idx = vertex_idx;
/* increase slots used in cache */
(*grp_used)++;
return cache_array;
}
/* get current cache data */
static GpencilBatchCache *gpencil_batch_get_element(Object *ob)
{
Object *ob_orig = (Object *)DEG_get_original_id(&ob->id);
return ob_orig->runtime.gpencil_cache;
}
/* verify if cache is valid */
static bool gpencil_batch_cache_valid(GpencilBatchCache *cache, bGPdata *gpd, int cfra)
{
bool valid = true;
if (cache == NULL) {
return false;
}
cache->is_editmode = GPENCIL_ANY_EDIT_MODE(gpd);
if (cfra != cache->cache_frame) {
valid = false;
}
else if (gpd->flag & GP_DATA_CACHE_IS_DIRTY) {
valid = false;
}
else if (gpd->flag & GP_DATA_SHOW_ONIONSKINS) {
/* if onion, set as dirty always
* This reduces performance, but avoid any crash in the multiple
* overlay and multiwindow options and keep all windows working
*/
valid = false;
}
else if (cache->is_editmode) {
valid = false;
}
else if (cache->is_dirty) {
valid = false;
}
return valid;
}
/* cache init */
static GpencilBatchCache *gpencil_batch_cache_init(Object *ob, int cfra)
{
Object *ob_orig = (Object *)DEG_get_original_id(&ob->id);
bGPdata *gpd = (bGPdata *)ob_orig->data;
GpencilBatchCache *cache = gpencil_batch_get_element(ob);
if (!cache) {
cache = MEM_callocN(sizeof(*cache), __func__);
ob_orig->runtime.gpencil_cache = cache;
}
else {
memset(cache, 0, sizeof(*cache));
}
cache->is_editmode = GPENCIL_ANY_EDIT_MODE(gpd);
cache->is_dirty = true;
cache->cache_frame = cfra;
/* create array of derived frames equal to number of layers */
cache->tot_layers = BLI_listbase_count(&gpd->layers);
CLAMP_MIN(cache->tot_layers, 1);
cache->derived_array = MEM_callocN(sizeof(struct bGPDframe) * cache->tot_layers, "Derived GPF");
return cache;
}
/* clear cache */
static void gpencil_batch_cache_clear(GpencilBatchCache *cache)
{
if (!cache) {
return;
}
GPU_BATCH_DISCARD_SAFE(cache->b_stroke.batch);
GPU_BATCH_DISCARD_SAFE(cache->b_point.batch);
GPU_BATCH_DISCARD_SAFE(cache->b_fill.batch);
GPU_BATCH_DISCARD_SAFE(cache->b_edit.batch);
GPU_BATCH_DISCARD_SAFE(cache->b_edlin.batch);
MEM_SAFE_FREE(cache->b_stroke.batch);
MEM_SAFE_FREE(cache->b_point.batch);
MEM_SAFE_FREE(cache->b_fill.batch);
MEM_SAFE_FREE(cache->b_edit.batch);
MEM_SAFE_FREE(cache->b_edlin.batch);
MEM_SAFE_FREE(cache->grp_cache);
cache->grp_size = 0;
cache->grp_used = 0;
/* clear all frames derived data */
for (int i = 0; i < cache->tot_layers; i++) {
bGPDframe *derived_gpf = &cache->derived_array[i];
BKE_gpencil_free_frame_runtime_data(derived_gpf);
derived_gpf = NULL;
}
cache->tot_layers = 0;
MEM_SAFE_FREE(cache->derived_array);
}
/* get cache */
GpencilBatchCache *gpencil_batch_cache_get(Object *ob, int cfra)
{
Object *ob_orig = (Object *)DEG_get_original_id(&ob->id);
bGPdata *gpd = (bGPdata *)ob_orig->data;
GpencilBatchCache *cache = gpencil_batch_get_element(ob);
if (!gpencil_batch_cache_valid(cache, gpd, cfra)) {
if (cache) {
gpencil_batch_cache_clear(cache);
}
return gpencil_batch_cache_init(ob, cfra);
}
else {
return cache;
}
}
/* set cache as dirty */
void DRW_gpencil_batch_cache_dirty_tag(bGPdata *gpd)
{
bGPdata *gpd_orig = (bGPdata *)DEG_get_original_id(&gpd->id);
gpd_orig->flag |= GP_DATA_CACHE_IS_DIRTY;
}
/* free batch cache */
void DRW_gpencil_batch_cache_free(bGPdata *UNUSED(gpd))
{
return;
}
/* wrapper to clear cache */
void DRW_gpencil_freecache(struct Object *ob)
{
if ((ob) && (ob->type == OB_GPENCIL)) {
gpencil_batch_cache_clear(ob->runtime.gpencil_cache);
MEM_SAFE_FREE(ob->runtime.gpencil_cache);
bGPdata *gpd = (bGPdata *)ob->data;
if (gpd) {
gpd->flag |= GP_DATA_CACHE_IS_DIRTY;
}
}
}
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