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|
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2017 Blender Foundation. All rights reserved. */
/** \file
* \ingroup draw
*
* \brief Curves API for render engines
*/
#include <cstring>
#include "MEM_guardedalloc.h"
#include "BLI_listbase.h"
#include "BLI_math_base.h"
#include "BLI_math_vec_types.hh"
#include "BLI_math_vector.h"
#include "BLI_math_vector.hh"
#include "BLI_span.hh"
#include "BLI_utildefines.h"
#include "DNA_curves_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "BKE_curves.hh"
#include "BKE_geometry_set.hh"
#include "GPU_batch.h"
#include "GPU_material.h"
#include "GPU_texture.h"
#include "DRW_render.h"
#include "draw_attributes.h"
#include "draw_cache_impl.h" /* own include */
#include "draw_cache_inline.h"
#include "draw_curves_private.h" /* own include */
#include "draw_shader.h"
using blender::ColorGeometry4f;
using blender::float3;
using blender::IndexRange;
using blender::MutableSpan;
using blender::Span;
/* ---------------------------------------------------------------------- */
/* Curves GPUBatch Cache */
struct CurvesBatchCache {
CurvesEvalCache curves_cache;
GPUBatch *edit_points;
/* Whether the cache is invalid. */
bool is_dirty;
/**
* The draw cache extraction is currently not multi-threaded for multiple objects, but if it was,
* some locking would be necessary because multiple objects can use the same curves data with
* different materials, etc. This is a placeholder to make multi-threading easier in the future.
*/
std::mutex render_mutex;
};
static bool curves_batch_cache_valid(const Curves &curves)
{
const CurvesBatchCache *cache = static_cast<CurvesBatchCache *>(curves.batch_cache);
return (cache && cache->is_dirty == false);
}
static void curves_batch_cache_init(Curves &curves)
{
CurvesBatchCache *cache = static_cast<CurvesBatchCache *>(curves.batch_cache);
if (!cache) {
cache = MEM_new<CurvesBatchCache>(__func__);
curves.batch_cache = cache;
}
else {
cache = {};
}
cache->is_dirty = false;
}
static void curves_discard_attributes(CurvesEvalCache &curves_cache)
{
for (const int i : IndexRange(GPU_MAX_ATTR)) {
GPU_VERTBUF_DISCARD_SAFE(curves_cache.proc_attributes_buf[i]);
DRW_TEXTURE_FREE_SAFE(curves_cache.proc_attributes_tex[i]);
}
for (const int i : IndexRange(MAX_HAIR_SUBDIV)) {
for (const int j : IndexRange(GPU_MAX_ATTR)) {
GPU_VERTBUF_DISCARD_SAFE(curves_cache.final[i].attributes_buf[j]);
DRW_TEXTURE_FREE_SAFE(curves_cache.final[i].attributes_tex[j]);
}
drw_attributes_clear(&curves_cache.final[i].attr_used);
}
}
static void curves_batch_cache_clear_data(CurvesEvalCache &curves_cache)
{
/* TODO: more granular update tagging. */
GPU_VERTBUF_DISCARD_SAFE(curves_cache.proc_point_buf);
GPU_VERTBUF_DISCARD_SAFE(curves_cache.proc_length_buf);
GPU_VERTBUF_DISCARD_SAFE(curves_cache.data_edit_points);
DRW_TEXTURE_FREE_SAFE(curves_cache.point_tex);
DRW_TEXTURE_FREE_SAFE(curves_cache.length_tex);
GPU_VERTBUF_DISCARD_SAFE(curves_cache.proc_strand_buf);
GPU_VERTBUF_DISCARD_SAFE(curves_cache.proc_strand_seg_buf);
DRW_TEXTURE_FREE_SAFE(curves_cache.strand_tex);
DRW_TEXTURE_FREE_SAFE(curves_cache.strand_seg_tex);
for (const int i : IndexRange(MAX_HAIR_SUBDIV)) {
GPU_VERTBUF_DISCARD_SAFE(curves_cache.final[i].proc_buf);
DRW_TEXTURE_FREE_SAFE(curves_cache.final[i].proc_tex);
for (const int j : IndexRange(MAX_THICKRES)) {
GPU_BATCH_DISCARD_SAFE(curves_cache.final[i].proc_hairs[j]);
}
}
curves_discard_attributes(curves_cache);
}
static void curves_batch_cache_clear(Curves &curves)
{
CurvesBatchCache *cache = static_cast<CurvesBatchCache *>(curves.batch_cache);
if (!cache) {
return;
}
curves_batch_cache_clear_data(cache->curves_cache);
GPU_BATCH_DISCARD_SAFE(cache->edit_points);
}
void DRW_curves_batch_cache_validate(Curves *curves)
{
if (!curves_batch_cache_valid(*curves)) {
curves_batch_cache_clear(*curves);
curves_batch_cache_init(*curves);
}
}
static CurvesBatchCache &curves_batch_cache_get(Curves &curves)
{
DRW_curves_batch_cache_validate(&curves);
return *static_cast<CurvesBatchCache *>(curves.batch_cache);
}
void DRW_curves_batch_cache_dirty_tag(Curves *curves, int mode)
{
CurvesBatchCache *cache = static_cast<CurvesBatchCache *>(curves->batch_cache);
if (cache == nullptr) {
return;
}
switch (mode) {
case BKE_CURVES_BATCH_DIRTY_ALL:
cache->is_dirty = true;
break;
default:
BLI_assert_unreachable();
}
}
void DRW_curves_batch_cache_free(Curves *curves)
{
curves_batch_cache_clear(*curves);
MEM_delete(static_cast<CurvesBatchCache *>(curves->batch_cache));
curves->batch_cache = nullptr;
}
void DRW_curves_batch_cache_free_old(Curves *curves, int ctime)
{
CurvesBatchCache *cache = static_cast<CurvesBatchCache *>(curves->batch_cache);
if (cache == nullptr) {
return;
}
bool do_discard = false;
for (const int i : IndexRange(MAX_HAIR_SUBDIV)) {
CurvesEvalFinalCache &final_cache = cache->curves_cache.final[i];
if (drw_attributes_overlap(&final_cache.attr_used_over_time, &final_cache.attr_used)) {
final_cache.last_attr_matching_time = ctime;
}
if (ctime - final_cache.last_attr_matching_time > U.vbotimeout) {
do_discard = true;
}
drw_attributes_clear(&final_cache.attr_used_over_time);
}
if (do_discard) {
curves_discard_attributes(cache->curves_cache);
}
}
static void ensure_seg_pt_count(const Curves &curves, CurvesEvalCache &curves_cache)
{
if (curves_cache.proc_point_buf != nullptr) {
return;
}
curves_cache.strands_len = curves.geometry.curve_num;
curves_cache.elems_len = curves.geometry.point_num + curves.geometry.curve_num;
curves_cache.point_len = curves.geometry.point_num;
}
struct PositionAndParameter {
float3 position;
float parameter;
};
static void curves_batch_cache_fill_segments_proc_pos(
const Curves &curves_id,
MutableSpan<PositionAndParameter> posTime_data,
MutableSpan<float> hairLength_data)
{
/* TODO: use hair radius layer if available. */
const int curve_num = curves_id.geometry.curve_num;
const blender::bke::CurvesGeometry &curves = blender::bke::CurvesGeometry::wrap(
curves_id.geometry);
Span<float3> positions = curves.positions();
for (const int i_curve : IndexRange(curve_num)) {
const IndexRange points = curves.points_for_curve(i_curve);
Span<float3> curve_positions = positions.slice(points);
MutableSpan<PositionAndParameter> curve_posTime_data = posTime_data.slice(points);
float total_len = 0.0f;
for (const int i_point : curve_positions.index_range()) {
if (i_point > 0) {
total_len += blender::math::distance(curve_positions[i_point - 1],
curve_positions[i_point]);
}
curve_posTime_data[i_point].position = curve_positions[i_point];
curve_posTime_data[i_point].parameter = total_len;
}
hairLength_data[i_curve] = total_len;
/* Assign length value. */
if (total_len > 0.0f) {
const float factor = 1.0f / total_len;
/* Divide by total length to have a [0-1] number. */
for (const int i_point : curve_positions.index_range()) {
curve_posTime_data[i_point].parameter *= factor;
}
}
}
}
static void curves_batch_cache_ensure_procedural_pos(const Curves &curves,
CurvesEvalCache &cache,
GPUMaterial *gpu_material)
{
if (cache.proc_point_buf == nullptr || DRW_vbo_requested(cache.proc_point_buf)) {
/* Initialize vertex format. */
GPUVertFormat format = {0};
GPU_vertformat_attr_add(&format, "posTime", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
GPU_vertformat_alias_add(&format, "pos");
cache.proc_point_buf = GPU_vertbuf_create_with_format_ex(
&format, GPU_USAGE_STATIC | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY);
GPU_vertbuf_data_alloc(cache.proc_point_buf, cache.point_len);
MutableSpan posTime_data{
reinterpret_cast<PositionAndParameter *>(GPU_vertbuf_get_data(cache.proc_point_buf)),
cache.point_len};
GPUVertFormat length_format = {0};
GPU_vertformat_attr_add(&length_format, "hairLength", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
cache.proc_length_buf = GPU_vertbuf_create_with_format_ex(
&length_format, GPU_USAGE_STATIC | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY);
GPU_vertbuf_data_alloc(cache.proc_length_buf, cache.strands_len);
MutableSpan hairLength_data{
reinterpret_cast<float *>(GPU_vertbuf_get_data(cache.proc_length_buf)), cache.strands_len};
curves_batch_cache_fill_segments_proc_pos(curves, posTime_data, hairLength_data);
/* Create vbo immediately to bind to texture buffer. */
GPU_vertbuf_use(cache.proc_point_buf);
cache.point_tex = GPU_texture_create_from_vertbuf("hair_point", cache.proc_point_buf);
}
if (gpu_material && cache.proc_length_buf != nullptr && cache.length_tex) {
ListBase gpu_attrs = GPU_material_attributes(gpu_material);
LISTBASE_FOREACH (GPUMaterialAttribute *, attr, &gpu_attrs) {
if (attr->type == CD_HAIRLENGTH) {
GPU_vertbuf_use(cache.proc_length_buf);
cache.length_tex = GPU_texture_create_from_vertbuf("hair_length", cache.proc_length_buf);
break;
}
}
}
}
static void curves_batch_cache_ensure_data_edit_points(const Curves &curves_id,
CurvesEvalCache &cache)
{
const blender::bke::CurvesGeometry &curves = blender::bke::CurvesGeometry::wrap(
curves_id.geometry);
static GPUVertFormat format_data = {0};
uint data = GPU_vertformat_attr_add(&format_data, "data", GPU_COMP_U8, 1, GPU_FETCH_INT);
GPU_vertbuf_init_with_format(cache.data_edit_points, &format_data);
GPU_vertbuf_data_alloc(cache.data_edit_points, curves.points_num());
blender::VArray<float> selection;
switch (curves_id.selection_domain) {
case ATTR_DOMAIN_POINT:
selection = curves.selection_point_float();
for (const int point_i : selection.index_range()) {
uint8_t vflag = 0;
const float point_selection = selection[point_i];
SET_FLAG_FROM_TEST(vflag, (point_selection > 0.0f), VFLAG_VERT_SELECTED);
GPU_vertbuf_attr_set(cache.data_edit_points, data, point_i, &vflag);
}
break;
case ATTR_DOMAIN_CURVE:
selection = curves.selection_curve_float();
for (const int curve_i : curves.curves_range()) {
uint8_t vflag = 0;
const float curve_selection = selection[curve_i];
SET_FLAG_FROM_TEST(vflag, (curve_selection > 0.0f), VFLAG_VERT_SELECTED);
const IndexRange points = curves.points_for_curve(curve_i);
for (const int point_i : points) {
GPU_vertbuf_attr_set(cache.data_edit_points, data, point_i, &vflag);
}
}
break;
}
}
void drw_curves_get_attribute_sampler_name(const char *layer_name, char r_sampler_name[32])
{
char attr_safe_name[GPU_MAX_SAFE_ATTR_NAME];
GPU_vertformat_safe_attr_name(layer_name, attr_safe_name, GPU_MAX_SAFE_ATTR_NAME);
/* Attributes use auto-name. */
BLI_snprintf(r_sampler_name, 32, "a%s", attr_safe_name);
}
static void curves_batch_cache_ensure_procedural_final_attr(CurvesEvalCache &cache,
const GPUVertFormat *format,
const int subdiv,
const int index,
const char *name)
{
CurvesEvalFinalCache &final_cache = cache.final[subdiv];
final_cache.attributes_buf[index] = GPU_vertbuf_create_with_format_ex(
format, GPU_USAGE_DEVICE_ONLY | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY);
/* Create a destination buffer for the transform feedback. Sized appropriately */
/* Those are points! not line segments. */
GPU_vertbuf_data_alloc(final_cache.attributes_buf[index],
final_cache.strands_res * cache.strands_len);
/* Create vbo immediately to bind to texture buffer. */
GPU_vertbuf_use(final_cache.attributes_buf[index]);
final_cache.attributes_tex[index] = GPU_texture_create_from_vertbuf(
name, final_cache.attributes_buf[index]);
}
static void curves_batch_ensure_attribute(const Curves &curves,
CurvesEvalCache &cache,
const DRW_AttributeRequest &request,
const int subdiv,
const int index)
{
GPU_VERTBUF_DISCARD_SAFE(cache.proc_attributes_buf[index]);
DRW_TEXTURE_FREE_SAFE(cache.proc_attributes_tex[index]);
char sampler_name[32];
drw_curves_get_attribute_sampler_name(request.attribute_name, sampler_name);
GPUVertFormat format = {0};
GPU_vertformat_deinterleave(&format);
/* All attributes use vec4, see comment below. */
GPU_vertformat_attr_add(&format, sampler_name, GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
cache.proc_attributes_buf[index] = GPU_vertbuf_create_with_format_ex(
&format, GPU_USAGE_STATIC | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY);
GPUVertBuf *attr_vbo = cache.proc_attributes_buf[index];
GPU_vertbuf_data_alloc(attr_vbo,
request.domain == ATTR_DOMAIN_POINT ? curves.geometry.point_num :
curves.geometry.curve_num);
const blender::bke::AttributeAccessor attributes =
blender::bke::CurvesGeometry::wrap(curves.geometry).attributes();
/* TODO(@kevindietrich): float4 is used for scalar attributes as the implicit conversion done
* by OpenGL to vec4 for a scalar `s` will produce a `vec4(s, 0, 0, 1)`. However, following
* the Blender convention, it should be `vec4(s, s, s, 1)`. This could be resolved using a
* similar texture state swizzle to map the attribute correctly as for volume attributes, so we
* can control the conversion ourselves. */
blender::VArray<ColorGeometry4f> attribute = attributes.lookup_or_default<ColorGeometry4f>(
request.attribute_name, request.domain, {0.0f, 0.0f, 0.0f, 1.0f});
MutableSpan<ColorGeometry4f> vbo_span{
static_cast<ColorGeometry4f *>(GPU_vertbuf_get_data(attr_vbo)),
attributes.domain_size(request.domain)};
attribute.materialize(vbo_span);
GPU_vertbuf_use(attr_vbo);
cache.proc_attributes_tex[index] = GPU_texture_create_from_vertbuf(sampler_name, attr_vbo);
/* Existing final data may have been for a different attribute (with a different name or domain),
* free the data. */
GPU_VERTBUF_DISCARD_SAFE(cache.final[subdiv].attributes_buf[index]);
DRW_TEXTURE_FREE_SAFE(cache.final[subdiv].attributes_tex[index]);
/* Ensure final data for points. */
if (request.domain == ATTR_DOMAIN_POINT) {
curves_batch_cache_ensure_procedural_final_attr(cache, &format, subdiv, index, sampler_name);
}
}
static void curves_batch_cache_fill_strands_data(const Curves &curves_id,
GPUVertBufRaw &data_step,
GPUVertBufRaw &seg_step)
{
const blender::bke::CurvesGeometry &curves = blender::bke::CurvesGeometry::wrap(
curves_id.geometry);
for (const int i : IndexRange(curves.curves_num())) {
const IndexRange points = curves.points_for_curve(i);
*(uint *)GPU_vertbuf_raw_step(&data_step) = points.start();
*(ushort *)GPU_vertbuf_raw_step(&seg_step) = points.size() - 1;
}
}
static void curves_batch_cache_ensure_procedural_strand_data(Curves &curves,
CurvesEvalCache &cache)
{
GPUVertBufRaw data_step, seg_step;
GPUVertFormat format_data = {0};
uint data_id = GPU_vertformat_attr_add(&format_data, "data", GPU_COMP_U32, 1, GPU_FETCH_INT);
GPUVertFormat format_seg = {0};
uint seg_id = GPU_vertformat_attr_add(&format_seg, "data", GPU_COMP_U16, 1, GPU_FETCH_INT);
/* Curve Data. */
cache.proc_strand_buf = GPU_vertbuf_create_with_format_ex(
&format_data, GPU_USAGE_STATIC | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY);
GPU_vertbuf_data_alloc(cache.proc_strand_buf, cache.strands_len);
GPU_vertbuf_attr_get_raw_data(cache.proc_strand_buf, data_id, &data_step);
cache.proc_strand_seg_buf = GPU_vertbuf_create_with_format_ex(
&format_seg, GPU_USAGE_STATIC | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY);
GPU_vertbuf_data_alloc(cache.proc_strand_seg_buf, cache.strands_len);
GPU_vertbuf_attr_get_raw_data(cache.proc_strand_seg_buf, seg_id, &seg_step);
curves_batch_cache_fill_strands_data(curves, data_step, seg_step);
/* Create vbo immediately to bind to texture buffer. */
GPU_vertbuf_use(cache.proc_strand_buf);
cache.strand_tex = GPU_texture_create_from_vertbuf("curves_strand", cache.proc_strand_buf);
GPU_vertbuf_use(cache.proc_strand_seg_buf);
cache.strand_seg_tex = GPU_texture_create_from_vertbuf("curves_strand_seg",
cache.proc_strand_seg_buf);
}
static void curves_batch_cache_ensure_procedural_final_points(CurvesEvalCache &cache, int subdiv)
{
/* Same format as point_tex. */
GPUVertFormat format = {0};
GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 4, GPU_FETCH_FLOAT);
cache.final[subdiv].proc_buf = GPU_vertbuf_create_with_format_ex(
&format, GPU_USAGE_DEVICE_ONLY | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY);
/* Create a destination buffer for the transform feedback. Sized appropriately */
/* Those are points! not line segments. */
GPU_vertbuf_data_alloc(cache.final[subdiv].proc_buf,
cache.final[subdiv].strands_res * cache.strands_len);
/* Create vbo immediately to bind to texture buffer. */
GPU_vertbuf_use(cache.final[subdiv].proc_buf);
cache.final[subdiv].proc_tex = GPU_texture_create_from_vertbuf("hair_proc",
cache.final[subdiv].proc_buf);
}
static void curves_batch_cache_fill_segments_indices(const Curves &curves,
const int res,
GPUIndexBufBuilder &elb)
{
const int curves_num = curves.geometry.curve_num;
uint curr_point = 0;
for ([[maybe_unused]] const int i : IndexRange(curves_num)) {
for (int k = 0; k < res; k++) {
GPU_indexbuf_add_generic_vert(&elb, curr_point++);
}
GPU_indexbuf_add_primitive_restart(&elb);
}
}
static void curves_batch_cache_ensure_procedural_indices(Curves &curves,
CurvesEvalCache &cache,
const int thickness_res,
const int subdiv)
{
BLI_assert(thickness_res <= MAX_THICKRES); /* Cylinder strip not currently supported. */
if (cache.final[subdiv].proc_hairs[thickness_res - 1] != nullptr) {
return;
}
int verts_per_curve = cache.final[subdiv].strands_res * thickness_res;
/* +1 for primitive restart */
int element_count = (verts_per_curve + 1) * cache.strands_len;
GPUPrimType prim_type = (thickness_res == 1) ? GPU_PRIM_LINE_STRIP : GPU_PRIM_TRI_STRIP;
static GPUVertFormat format = {0};
GPU_vertformat_clear(&format);
/* initialize vertex format */
GPU_vertformat_attr_add(&format, "dummy", GPU_COMP_U8, 1, GPU_FETCH_INT_TO_FLOAT_UNIT);
GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format);
GPU_vertbuf_data_alloc(vbo, 1);
GPUIndexBufBuilder elb;
GPU_indexbuf_init_ex(&elb, prim_type, element_count, element_count);
curves_batch_cache_fill_segments_indices(curves, verts_per_curve, elb);
cache.final[subdiv].proc_hairs[thickness_res - 1] = GPU_batch_create_ex(
prim_type, vbo, GPU_indexbuf_build(&elb), GPU_BATCH_OWNS_VBO | GPU_BATCH_OWNS_INDEX);
}
static bool curves_ensure_attributes(const Curves &curves,
CurvesBatchCache &cache,
GPUMaterial *gpu_material,
int subdiv)
{
const CustomData *cd_curve = &curves.geometry.curve_data;
const CustomData *cd_point = &curves.geometry.point_data;
CurvesEvalFinalCache &final_cache = cache.curves_cache.final[subdiv];
if (gpu_material) {
DRW_Attributes attrs_needed;
drw_attributes_clear(&attrs_needed);
ListBase gpu_attrs = GPU_material_attributes(gpu_material);
LISTBASE_FOREACH (GPUMaterialAttribute *, gpu_attr, &gpu_attrs) {
const char *name = gpu_attr->name;
int layer_index;
eCustomDataType type;
eAttrDomain domain;
if (drw_custom_data_match_attribute(cd_curve, name, &layer_index, &type)) {
domain = ATTR_DOMAIN_CURVE;
}
else if (drw_custom_data_match_attribute(cd_point, name, &layer_index, &type)) {
domain = ATTR_DOMAIN_POINT;
}
else {
continue;
}
drw_attributes_add_request(&attrs_needed, name, type, layer_index, domain);
}
if (!drw_attributes_overlap(&final_cache.attr_used, &attrs_needed)) {
/* Some new attributes have been added, free all and start over. */
for (const int i : IndexRange(GPU_MAX_ATTR)) {
GPU_VERTBUF_DISCARD_SAFE(cache.curves_cache.proc_attributes_buf[i]);
DRW_TEXTURE_FREE_SAFE(cache.curves_cache.proc_attributes_tex[i]);
}
drw_attributes_merge(&final_cache.attr_used, &attrs_needed, cache.render_mutex);
}
drw_attributes_merge(&final_cache.attr_used_over_time, &attrs_needed, cache.render_mutex);
}
bool need_tf_update = false;
for (const int i : IndexRange(final_cache.attr_used.num_requests)) {
const DRW_AttributeRequest &request = final_cache.attr_used.requests[i];
if (cache.curves_cache.proc_attributes_buf[i] != nullptr) {
continue;
}
if (request.domain == ATTR_DOMAIN_POINT) {
need_tf_update = true;
}
curves_batch_ensure_attribute(curves, cache.curves_cache, request, subdiv, i);
}
return need_tf_update;
}
bool curves_ensure_procedural_data(Curves *curves,
CurvesEvalCache **r_hair_cache,
GPUMaterial *gpu_material,
const int subdiv,
const int thickness_res)
{
bool need_ft_update = false;
CurvesBatchCache &cache = curves_batch_cache_get(*curves);
*r_hair_cache = &cache.curves_cache;
const int steps = 3; /* TODO: don't hard-code? */
(*r_hair_cache)->final[subdiv].strands_res = 1 << (steps + subdiv);
/* Refreshed on combing and simulation. */
if ((*r_hair_cache)->proc_point_buf == nullptr) {
ensure_seg_pt_count(*curves, cache.curves_cache);
curves_batch_cache_ensure_procedural_pos(*curves, cache.curves_cache, gpu_material);
need_ft_update = true;
}
/* Refreshed if active layer or custom data changes. */
if ((*r_hair_cache)->strand_tex == nullptr) {
curves_batch_cache_ensure_procedural_strand_data(*curves, cache.curves_cache);
}
/* Refreshed only on subdiv count change. */
if ((*r_hair_cache)->final[subdiv].proc_buf == nullptr) {
curves_batch_cache_ensure_procedural_final_points(cache.curves_cache, subdiv);
need_ft_update = true;
}
if ((*r_hair_cache)->final[subdiv].proc_hairs[thickness_res - 1] == nullptr) {
curves_batch_cache_ensure_procedural_indices(
*curves, cache.curves_cache, thickness_res, subdiv);
}
need_ft_update |= curves_ensure_attributes(*curves, cache, gpu_material, subdiv);
return need_ft_update;
}
int DRW_curves_material_count_get(Curves *curves)
{
return max_ii(1, curves->totcol);
}
GPUBatch *DRW_curves_batch_cache_get_edit_points(Curves *curves)
{
CurvesBatchCache &cache = curves_batch_cache_get(*curves);
return DRW_batch_request(&cache.edit_points);
}
static void request_attribute(Curves &curves, const char *name)
{
CurvesBatchCache &cache = curves_batch_cache_get(curves);
const DRWContextState *draw_ctx = DRW_context_state_get();
const Scene *scene = draw_ctx->scene;
const int subdiv = scene->r.hair_subdiv;
CurvesEvalFinalCache &final_cache = cache.curves_cache.final[subdiv];
DRW_Attributes attributes{};
blender::bke::CurvesGeometry &curves_geometry = blender::bke::CurvesGeometry::wrap(
curves.geometry);
std::optional<blender::bke::AttributeMetaData> meta_data =
curves_geometry.attributes().lookup_meta_data(name);
if (!meta_data) {
return;
}
const eAttrDomain domain = meta_data->domain;
const eCustomDataType type = meta_data->data_type;
const CustomData &custom_data = domain == ATTR_DOMAIN_POINT ? curves.geometry.point_data :
curves.geometry.curve_data;
drw_attributes_add_request(
&attributes, name, type, CustomData_get_named_layer(&custom_data, type, name), domain);
drw_attributes_merge(&final_cache.attr_used, &attributes, cache.render_mutex);
}
GPUTexture **DRW_curves_texture_for_evaluated_attribute(Curves *curves,
const char *name,
bool *r_is_point_domain)
{
CurvesBatchCache &cache = curves_batch_cache_get(*curves);
const DRWContextState *draw_ctx = DRW_context_state_get();
const Scene *scene = draw_ctx->scene;
const int subdiv = scene->r.hair_subdiv;
CurvesEvalFinalCache &final_cache = cache.curves_cache.final[subdiv];
request_attribute(*curves, name);
int request_i = -1;
for (const int i : IndexRange(final_cache.attr_used.num_requests)) {
if (STREQ(final_cache.attr_used.requests[i].attribute_name, name)) {
request_i = i;
break;
}
}
if (request_i == -1) {
*r_is_point_domain = false;
return nullptr;
}
switch (final_cache.attr_used.requests[request_i].domain) {
case ATTR_DOMAIN_POINT:
*r_is_point_domain = true;
return &final_cache.attributes_tex[request_i];
case ATTR_DOMAIN_CURVE:
*r_is_point_domain = false;
return &cache.curves_cache.proc_attributes_tex[request_i];
default:
BLI_assert_unreachable();
return nullptr;
}
}
void DRW_curves_batch_cache_create_requested(Object *ob)
{
Curves *curves = static_cast<Curves *>(ob->data);
CurvesBatchCache &cache = curves_batch_cache_get(*curves);
if (DRW_batch_requested(cache.edit_points, GPU_PRIM_POINTS)) {
DRW_vbo_request(cache.edit_points, &cache.curves_cache.proc_point_buf);
DRW_vbo_request(cache.edit_points, &cache.curves_cache.data_edit_points);
}
if (DRW_vbo_requested(cache.curves_cache.proc_point_buf)) {
curves_batch_cache_ensure_procedural_pos(*curves, cache.curves_cache, nullptr);
}
if (DRW_vbo_requested(cache.curves_cache.data_edit_points)) {
curves_batch_cache_ensure_data_edit_points(*curves, cache.curves_cache);
}
}
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