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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) 2021 by Blender Foundation.
* All rights reserved.
*/
#include "BKE_subdiv_modifier.h"
#include "MEM_guardedalloc.h"
#include "DNA_mesh_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_userdef_types.h"
#include "BKE_modifier.h"
#include "BKE_subdiv.h"
#include "GPU_capabilities.h"
#include "GPU_context.h"
#include "opensubdiv_capi.h"
void BKE_subsurf_modifier_subdiv_settings_init(SubdivSettings *settings,
const SubsurfModifierData *smd,
const bool use_render_params)
{
const int requested_levels = (use_render_params) ? smd->renderLevels : smd->levels;
settings->is_simple = (smd->subdivType == SUBSURF_TYPE_SIMPLE);
settings->is_adaptive = !(smd->flags & eSubsurfModifierFlag_UseRecursiveSubdivision);
settings->level = settings->is_simple ?
1 :
(settings->is_adaptive ? smd->quality : requested_levels);
settings->use_creases = (smd->flags & eSubsurfModifierFlag_UseCrease);
settings->vtx_boundary_interpolation = BKE_subdiv_vtx_boundary_interpolation_from_subsurf(
smd->boundary_smooth);
settings->fvar_linear_interpolation = BKE_subdiv_fvar_interpolation_from_uv_smooth(
smd->uv_smooth);
}
static ModifierData *modifier_get_last_enabled_for_mode(const Scene *scene,
const Object *ob,
int required_mode)
{
ModifierData *md = ob->modifiers.last;
while (md) {
if (BKE_modifier_is_enabled(scene, md, required_mode)) {
break;
}
md = md->prev;
}
return md;
}
bool BKE_subsurf_modifier_can_do_gpu_subdiv_ex(const Scene *scene,
const Object *ob,
const SubsurfModifierData *smd,
int required_mode,
bool skip_check_is_last)
{
if ((U.gpu_flag & USER_GPU_FLAG_SUBDIVISION_EVALUATION) == 0) {
return false;
}
if (!skip_check_is_last) {
ModifierData *md = modifier_get_last_enabled_for_mode(scene, ob, required_mode);
if (md != (const ModifierData *)smd) {
return false;
}
}
/* Only OpenGL is supported for OpenSubdiv evaluation for now. */
if (GPU_backend_get_type() != GPU_BACKEND_OPENGL) {
return false;
}
if (!(GPU_compute_shader_support() && GPU_shader_storage_buffer_objects_support())) {
return false;
}
const int available_evaluators = openSubdiv_getAvailableEvaluators();
if ((available_evaluators & OPENSUBDIV_EVALUATOR_GLSL_COMPUTE) == 0) {
return false;
}
return true;
}
bool BKE_subsurf_modifier_can_do_gpu_subdiv(const Scene *scene,
const Object *ob,
int required_mode)
{
ModifierData *md = modifier_get_last_enabled_for_mode(scene, ob, required_mode);
if (!md) {
return false;
}
if (md->type != eModifierType_Subsurf) {
return false;
}
return BKE_subsurf_modifier_can_do_gpu_subdiv_ex(
scene, ob, (SubsurfModifierData *)md, required_mode, true);
}
void (*BKE_subsurf_modifier_free_gpu_cache_cb)(Subdiv *subdiv) = NULL;
Subdiv *BKE_subsurf_modifier_subdiv_descriptor_ensure(const SubsurfModifierData *smd,
const SubdivSettings *subdiv_settings,
const Mesh *mesh,
const bool for_draw_code)
{
SubsurfRuntimeData *runtime_data = (SubsurfRuntimeData *)smd->modifier.runtime;
if (runtime_data->subdiv && runtime_data->set_by_draw_code != for_draw_code) {
BKE_subdiv_free(runtime_data->subdiv);
runtime_data->subdiv = NULL;
}
Subdiv *subdiv = BKE_subdiv_update_from_mesh(runtime_data->subdiv, subdiv_settings, mesh);
runtime_data->subdiv = subdiv;
runtime_data->set_by_draw_code = for_draw_code;
return subdiv;
}
SubsurfRuntimeData *BKE_subsurf_modifier_ensure_runtime(SubsurfModifierData *smd)
{
SubsurfRuntimeData *runtime_data = (SubsurfRuntimeData *)smd->modifier.runtime;
if (runtime_data == NULL) {
runtime_data = MEM_callocN(sizeof(*runtime_data), "subsurf runtime");
smd->modifier.runtime = runtime_data;
}
return runtime_data;
}
int BKE_subsurf_modifier_eval_required_mode(bool is_final_render, bool is_edit_mode)
{
if (is_final_render) {
return eModifierMode_Render;
}
return eModifierMode_Realtime | (is_edit_mode ? eModifierMode_Editmode : 0);
}
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