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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation. All rights reserved. */
/** \file
* \ingroup bke
*/
#pragma once
#include "BLI_sys_types.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Hardcoded for until GPU shaders are automatically generated, then we will have a more
* programmatic way of detecting this. */
#define MAX_GPU_SUBDIV_SSBOS 12
struct Mesh;
struct Object;
struct Scene;
struct Subdiv;
struct SubdivSettings;
struct SubsurfModifierData;
void BKE_subsurf_modifier_subdiv_settings_init(struct SubdivSettings *settings,
const struct SubsurfModifierData *smd,
bool use_render_params);
bool BKE_subsurf_modifier_use_custom_loop_normals(const struct SubsurfModifierData *smd,
const struct Mesh *mesh);
/**
* Return true if GPU subdivision evaluation is disabled by force due to incompatible mesh or
* modifier settings. This will only return true if GPU subdivision is enabled in the preferences
* and supported by the GPU. It is mainly useful for showing UI messages.
*/
bool BKE_subsurf_modifier_force_disable_gpu_evaluation_for_mesh(
const struct SubsurfModifierData *smd, const struct Mesh *mesh);
/**
* \param skip_check_is_last: When true, we assume that the modifier passed is the last enabled
* modifier in the stack.
*/
bool BKE_subsurf_modifier_can_do_gpu_subdiv(const struct Scene *scene,
const struct Object *ob,
const struct Mesh *mesh,
const struct SubsurfModifierData *smd,
int required_mode);
bool BKE_subsurf_modifier_has_gpu_subdiv(const struct Mesh *mesh);
extern void (*BKE_subsurf_modifier_free_gpu_cache_cb)(struct Subdiv *subdiv);
/**
* Main goal of this function is to give usable subdivision surface descriptor
* which matches settings and topology.
*/
struct Subdiv *BKE_subsurf_modifier_subdiv_descriptor_ensure(
const struct SubsurfModifierData *smd,
const struct SubdivSettings *subdiv_settings,
const struct Mesh *mesh,
bool for_draw_code);
struct SubsurfRuntimeData *BKE_subsurf_modifier_ensure_runtime(struct SubsurfModifierData *smd);
/**
* Return the #ModifierMode required for the evaluation of the subsurf modifier,
* which should be used to check if the modifier is enabled.
*/
int BKE_subsurf_modifier_eval_required_mode(bool is_final_render, bool is_edit_mode);
#ifdef __cplusplus
}
#endif
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