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test/source/blender/draw/intern/draw_cache_impl_curves.cc

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/* SPDX-FileCopyrightText: 2017 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup draw
*
* \brief Curves API for render engines
*/
#include <cstring>
#include "MEM_guardedalloc.h"
#include "BLI_array_utils.hh"
#include "BLI_listbase.h"
#include "BLI_math_base.h"
#include "BLI_math_vector.hh"
#include "BLI_math_vector_types.hh"
#include "BLI_span.hh"
#include "BLI_string_utf8.h"
#include "BLI_task.hh"
#include "DNA_curves_types.h"
#include "DNA_object_types.h"
#include "DNA_userdef_types.h"
#include "DEG_depsgraph_query.hh"
#include "BKE_crazyspace.hh"
#include "BKE_curves.hh"
#include "BKE_curves_utils.hh"
#include "BKE_customdata.hh"
#include "BKE_geometry_set.hh"
#include "GPU_batch.hh"
#include "GPU_context.hh"
#include "GPU_material.hh"
#include "GPU_texture.hh"
#include "DRW_render.hh"
#include "draw_attributes.hh"
#include "draw_cache_impl.hh" /* own include */
#include "draw_cache_inline.hh"
#include "draw_context_private.hh"
#include "draw_curves_private.hh" /* own include */
#include "draw_hair_private.hh"
namespace blender::draw {
#define EDIT_CURVES_NURBS_CONTROL_POINT (1u)
#define EDIT_CURVES_BEZIER_HANDLE (1u << 1)
#define EDIT_CURVES_ACTIVE_HANDLE (1u << 2)
/* Bezier curve control point lying on the curve.
* The one between left and right handles. */
#define EDIT_CURVES_BEZIER_KNOT (1u << 3)
#define EDIT_CURVES_HANDLE_TYPES_SHIFT (4u)
/* ---------------------------------------------------------------------- */
struct CurvesBatchCache {
CurvesEvalCache eval_cache;
gpu::Batch *edit_points;
gpu::Batch *edit_handles;
gpu::Batch *sculpt_cage;
gpu::IndexBuf *sculpt_cage_ibo;
/* Crazy-space point positions for original points. */
gpu::VertBuf *edit_points_pos;
/* Additional data needed for shader to choose color for each point in edit_points_pos.
* If first bit is set, then point is NURBS control point. EDIT_CURVES_NURBS_CONTROL_POINT is
* used to set and test. If second, then point is Bezier handle point. Set and tested with
* EDIT_CURVES_BEZIER_HANDLE.
* In Bezier case two handle types of HandleType are also encoded.
* Byte structure for Bezier knot point (handle middle point):
* | left handle type | right handle type | | BEZIER| NURBS|
* | 7 6 | 5 4 | 3 2 | 1 | 0 |
*
* If it is left or right handle point, then same handle type is repeated in both slots.
*/
gpu::VertBuf *edit_points_data;
/* Selection of original points. */
gpu::VertBuf *edit_points_selection;
gpu::IndexBuf *edit_handles_ibo;
gpu::Batch *edit_curves_lines;
gpu::VertBuf *edit_curves_lines_pos;
gpu::IndexBuf *edit_curves_lines_ibo;
/* Whether the cache is invalid. */
bool is_dirty;
};
static bool batch_cache_is_dirty(const Curves &curves)
{
const CurvesBatchCache *cache = static_cast<CurvesBatchCache *>(curves.batch_cache);
return (cache && cache->is_dirty == false);
}
static void init_batch_cache(Curves &curves)
{
CurvesBatchCache *cache = static_cast<CurvesBatchCache *>(curves.batch_cache);
if (!cache) {
cache = MEM_new<CurvesBatchCache>(__func__);
curves.batch_cache = cache;
}
else {
cache->eval_cache = {};
}
cache->is_dirty = false;
}
static void clear_edit_data(CurvesBatchCache *cache)
{
/* TODO: more granular update tagging. */
GPU_VERTBUF_DISCARD_SAFE(cache->edit_points_pos);
GPU_VERTBUF_DISCARD_SAFE(cache->edit_points_data);
GPU_VERTBUF_DISCARD_SAFE(cache->edit_points_selection);
GPU_INDEXBUF_DISCARD_SAFE(cache->edit_handles_ibo);
GPU_BATCH_DISCARD_SAFE(cache->edit_points);
GPU_BATCH_DISCARD_SAFE(cache->edit_handles);
GPU_INDEXBUF_DISCARD_SAFE(cache->sculpt_cage_ibo);
GPU_BATCH_DISCARD_SAFE(cache->sculpt_cage);
GPU_VERTBUF_DISCARD_SAFE(cache->edit_curves_lines_pos);
GPU_INDEXBUF_DISCARD_SAFE(cache->edit_curves_lines_ibo);
GPU_BATCH_DISCARD_SAFE(cache->edit_curves_lines);
}
void CurvesEvalCache::discard_attributes()
{
for (const int i : IndexRange(GPU_MAX_ATTR)) {
this->evaluated_attributes_buf[i].reset();
}
for (const int i : IndexRange(GPU_MAX_ATTR)) {
this->curve_attributes_buf[i].reset();
}
this->attr_used.clear();
}
void CurvesEvalCache::clear()
{
/* TODO: more granular update tagging. */
this->evaluated_pos_rad_buf.reset();
this->evaluated_time_buf.reset();
this->curves_length_buf.reset();
this->points_by_curve_buf.reset();
this->evaluated_points_by_curve_buf.reset();
this->curves_type_buf.reset();
this->curves_resolution_buf.reset();
this->curves_cyclic_buf.reset();
this->handles_positions_left_buf.reset();
this->handles_positions_right_buf.reset();
this->bezier_offsets_buf.reset();
this->curves_order_buf.reset();
this->control_weights_buf.reset();
this->basis_cache_buf.reset();
this->basis_cache_offset_buf.reset();
this->indirection_cylinder_buf.reset();
this->indirection_ribbon_buf.reset();
for (gpu::Batch *&batch : this->batch) {
GPU_BATCH_DISCARD_SAFE(batch);
}
this->discard_attributes();
}
static void clear_batch_cache(Curves &curves)
{
CurvesBatchCache *cache = static_cast<CurvesBatchCache *>(curves.batch_cache);
if (!cache) {
return;
}
cache->eval_cache.clear();
clear_edit_data(cache);
}
static CurvesBatchCache &get_batch_cache(Curves &curves)
{
DRW_curves_batch_cache_validate(&curves);
return *static_cast<CurvesBatchCache *>(curves.batch_cache);
}
static uint32_t bezier_data_value(int8_t handle_type, bool is_active)
{
return (handle_type << EDIT_CURVES_HANDLE_TYPES_SHIFT) | EDIT_CURVES_BEZIER_HANDLE |
(is_active ? EDIT_CURVES_ACTIVE_HANDLE : 0);
}
static int handles_and_points_num(const int points_num, const OffsetIndices<int> bezier_offsets)
{
return points_num + bezier_offsets.total_size() * 2;
}
static IndexRange handle_range_left(const int points_num, const OffsetIndices<int> bezier_offsets)
{
return IndexRange(points_num, bezier_offsets.total_size());
}
static IndexRange handle_range_right(const int points_num, const OffsetIndices<int> bezier_offsets)
{
return IndexRange(points_num + bezier_offsets.total_size(), bezier_offsets.total_size());
}
static void extract_edit_data(const OffsetIndices<int> points_by_curve,
const IndexMask &curve_selection,
const VArray<bool> &selection_attr,
const bool mark_active,
const uint32_t fill_value,
MutableSpan<uint32_t> data)
{
curve_selection.foreach_index(GrainSize(256), [&](const int curve) {
const IndexRange points = points_by_curve[curve];
bool is_active = false;
if (mark_active) {
is_active = array_utils::count_booleans(selection_attr, points) > 0;
}
uint32_t data_value = fill_value | (is_active ? EDIT_CURVES_ACTIVE_HANDLE : 0u);
data.slice(points).fill(data_value);
});
}
static void create_edit_points_data(const OffsetIndices<int> points_by_curve,
const IndexMask &catmull_rom_curves,
const IndexMask &poly_curves,
const IndexMask &bezier_curves,
const IndexMask &nurbs_curves,
const OffsetIndices<int> bezier_offsets,
const bke::CurvesGeometry &curves,
gpu::VertBuf &vbo)
{
const int points_num = points_by_curve.total_size();
const bke::AttributeAccessor attributes = curves.attributes();
const VArray selection = *attributes.lookup_or_default<bool>(
".selection", bke::AttrDomain::Point, true);
static const GPUVertFormat format = GPU_vertformat_from_attribute("data",
gpu::VertAttrType::UINT_32);
GPU_vertbuf_init_with_format(vbo, format);
GPU_vertbuf_data_alloc(vbo, handles_and_points_num(points_num, bezier_offsets));
MutableSpan<uint32_t> data = vbo.data<uint32_t>();
extract_edit_data(points_by_curve, catmull_rom_curves, selection, false, 0, data);
extract_edit_data(points_by_curve, poly_curves, selection, false, 0, data);
if (!bezier_curves.is_empty()) {
const VArray<int8_t> type_right = curves.handle_types_left();
const VArray<int8_t> types_left = curves.handle_types_right();
const VArray selection_left = *attributes.lookup_or_default<bool>(
".selection_handle_left", bke::AttrDomain::Point, true);
const VArray selection_right = *attributes.lookup_or_default<bool>(
".selection_handle_right", bke::AttrDomain::Point, true);
MutableSpan data_left = data.slice(handle_range_left(points_num, bezier_offsets));
MutableSpan data_right = data.slice(handle_range_right(points_num, bezier_offsets));
bezier_curves.foreach_index(GrainSize(256), [&](const int curve, const int64_t pos) {
const IndexRange points = points_by_curve[curve];
const IndexRange bezier_range = bezier_offsets[pos];
for (const int i : points.index_range()) {
const int point = points[i];
data[point] = EDIT_CURVES_BEZIER_KNOT;
const bool selected = selection[point] || selection_left[point] || selection_right[point];
const int bezier_point = bezier_range[i];
data_left[bezier_point] = bezier_data_value(type_right[point], selected);
data_right[bezier_point] = bezier_data_value(types_left[point], selected);
}
});
}
extract_edit_data(
points_by_curve, nurbs_curves, selection, true, EDIT_CURVES_NURBS_CONTROL_POINT, data);
}
static void create_edit_points_position(const bke::CurvesGeometry &curves,
const OffsetIndices<int> points_by_curve,
const IndexMask &bezier_curves,
const OffsetIndices<int> bezier_offsets,
const bke::crazyspace::GeometryDeformation deformation,
gpu::VertBuf &vbo)
{
const Span<float3> positions = deformation.positions;
const int points_num = positions.size();
static const GPUVertFormat format = GPU_vertformat_from_attribute(
"pos", gpu::VertAttrType::SFLOAT_32_32_32);
GPU_vertbuf_init_with_format(vbo, format);
GPU_vertbuf_data_alloc(vbo, handles_and_points_num(points_num, bezier_offsets));
MutableSpan<float3> data = vbo.data<float3>();
data.take_front(positions.size()).copy_from(positions);
if (!bezier_curves.is_empty()) {
/* TODO: Use deformed left_handle_positions and left_handle_positions. */
const std::optional<Span<float3>> handles_left = curves.handle_positions_left();
const std::optional<Span<float3>> handles_right = curves.handle_positions_right();
if (handles_left && handles_right) {
array_utils::gather_group_to_group(
points_by_curve,
bezier_offsets,
bezier_curves,
*handles_left,
data.slice(handle_range_left(points_num, bezier_offsets)));
array_utils::gather_group_to_group(
points_by_curve,
bezier_offsets,
bezier_curves,
*handles_right,
data.slice(handle_range_right(points_num, bezier_offsets)));
}
}
}
static void create_edit_points_selection(const OffsetIndices<int> points_by_curve,
const IndexMask &bezier_curves,
const OffsetIndices<int> bezier_offsets,
const bke::AttributeAccessor attributes,
gpu::VertBuf &vbo)
{
static const GPUVertFormat format_data = GPU_vertformat_from_attribute(
"selection", gpu::VertAttrType::SFLOAT_32);
const int points_num = points_by_curve.total_size();
GPU_vertbuf_init_with_format(vbo, format_data);
GPU_vertbuf_data_alloc(vbo, handles_and_points_num(points_num, bezier_offsets));
MutableSpan<float> data = vbo.data<float>();
const VArray attribute = *attributes.lookup_or_default<float>(
".selection", bke::AttrDomain::Point, 1.0f);
attribute.materialize(data.take_front(points_num));
if (!bezier_curves.is_empty()) {
const VArray selection_left = *attributes.lookup_or_default<float>(
".selection_handle_left", bke::AttrDomain::Point, 1.0f);
const VArray selection_right = *attributes.lookup_or_default<float>(
".selection_handle_right", bke::AttrDomain::Point, 1.0f);
array_utils::gather_group_to_group(points_by_curve,
bezier_offsets,
bezier_curves,
selection_left,
data.slice(handle_range_left(points_num, bezier_offsets)));
array_utils::gather_group_to_group(points_by_curve,
bezier_offsets,
bezier_curves,
selection_right,
data.slice(handle_range_right(points_num, bezier_offsets)));
}
}
static void create_lines_ibo_no_cyclic(const OffsetIndices<int> points_by_curve,
gpu::IndexBuf &ibo)
{
const int points_num = points_by_curve.total_size();
const int curves_num = points_by_curve.size();
const int indices_num = points_num + curves_num;
GPUIndexBufBuilder builder;
GPU_indexbuf_init(&builder, GPU_PRIM_LINE_STRIP, indices_num, points_num);
MutableSpan<uint> ibo_data = GPU_indexbuf_get_data(&builder);
threading::parallel_for(IndexRange(curves_num), 1024, [&](const IndexRange range) {
for (const int curve : range) {
const IndexRange points = points_by_curve[curve];
const IndexRange ibo_range = IndexRange(points.start() + curve, points.size() + 1);
for (const int i : points.index_range()) {
ibo_data[ibo_range[i]] = points[i];
}
ibo_data[ibo_range.last()] = gpu::RESTART_INDEX;
}
});
GPU_indexbuf_build_in_place_ex(&builder, 0, points_num, true, &ibo);
}
static void create_lines_ibo_with_cyclic(const OffsetIndices<int> points_by_curve,
const Span<bool> cyclic,
gpu::IndexBuf &ibo)
{
const int points_num = points_by_curve.total_size();
const int curves_num = points_by_curve.size();
const int indices_num = points_num + curves_num * 2;
GPUIndexBufBuilder builder;
GPU_indexbuf_init(&builder, GPU_PRIM_LINE_STRIP, indices_num, points_num);
MutableSpan<uint> ibo_data = GPU_indexbuf_get_data(&builder);
threading::parallel_for(IndexRange(curves_num), 1024, [&](const IndexRange range) {
for (const int curve : range) {
const IndexRange points = points_by_curve[curve];
const IndexRange ibo_range = IndexRange(points.start() + curve * 2, points.size() + 2);
for (const int i : points.index_range()) {
ibo_data[ibo_range[i]] = points[i];
}
ibo_data[ibo_range.last(1)] = cyclic[curve] ? points.first() : gpu::RESTART_INDEX;
ibo_data[ibo_range.last()] = gpu::RESTART_INDEX;
}
});
GPU_indexbuf_build_in_place_ex(&builder, 0, points_num, true, &ibo);
}
static void create_lines_ibo_with_cyclic(const OffsetIndices<int> points_by_curve,
const VArray<bool> &cyclic,
gpu::IndexBuf &ibo)
{
const array_utils::BooleanMix cyclic_mix = array_utils::booleans_mix_calc(cyclic);
if (cyclic_mix == array_utils::BooleanMix::AllFalse) {
create_lines_ibo_no_cyclic(points_by_curve, ibo);
}
else {
const VArraySpan<bool> cyclic_span(cyclic);
create_lines_ibo_with_cyclic(points_by_curve, cyclic_span, ibo);
}
}
static void create_segments_with_cyclic(const OffsetIndices<int> points_by_curve,
const VArray<bool> &cyclic,
const IndexMask &selection,
MutableSpan<uint2> lines)
{
selection.foreach_index(GrainSize(512), [&](const int curve) {
const IndexRange points = points_by_curve[curve];
MutableSpan<uint2> curve_lines = lines.slice(points);
for (const int i : points.index_range().drop_back(1)) {
curve_lines[i] = uint2(points[i]) + uint2(0, 1);
}
if (cyclic[curve]) {
curve_lines.last() = uint2(points.first(), points.last());
}
else {
curve_lines.last() = uint2(points.last(), points.last());
}
});
}
static void calc_edit_handles_ibo(const OffsetIndices<int> points_by_curve,
const IndexMask &catmull_rom_curves,
const IndexMask &poly_curves,
const IndexMask &bezier_curves,
const IndexMask &nurbs_curves,
const OffsetIndices<int> bezier_offsets,
const VArray<bool> &cyclic,
gpu::IndexBuf &ibo)
{
/* All curve types have poly-line segments draw of original (non-evaluate) topology to connect
* control points. Bezier have exception -- instead there is left and right handle segments. Left
* bezier handle segments point to original and handle points and lie at index of curve segment.
* Right bezier handle segments point to original and handle points and lie in a sequence after
* all other segments. */
const int points_num = points_by_curve.total_size();
const int extra_bezier_segments = bezier_offsets.total_size();
/* TODO: Use linestrip if there is no bezier curves. */
GPUIndexBufBuilder builder;
GPU_indexbuf_init(&builder,
GPU_PRIM_LINES,
points_num + extra_bezier_segments,
handles_and_points_num(points_num, bezier_offsets));
MutableSpan<uint2> lines = GPU_indexbuf_get_data(&builder).cast<uint2>();
BLI_assert(lines.size() == points_num + extra_bezier_segments);
MutableSpan<uint2> curve_or_handle_segments = lines.take_front(points_num);
#ifdef NDEBUG
lines.fill(uint2(std::numeric_limits<uint32_t>::min()));
#endif
create_segments_with_cyclic(
points_by_curve, cyclic, catmull_rom_curves, curve_or_handle_segments);
create_segments_with_cyclic(points_by_curve, cyclic, poly_curves, curve_or_handle_segments);
create_segments_with_cyclic(points_by_curve, cyclic, nurbs_curves, curve_or_handle_segments);
const IndexRange handles_left = handle_range_left(points_num, bezier_offsets);
const IndexRange handles_right = handle_range_right(points_num, bezier_offsets);
bezier_curves.foreach_index(GrainSize(512), [&](const int curve, const int pos) {
const IndexRange points = points_by_curve[curve];
const IndexRange bezier_point_range = bezier_offsets[pos];
for (const int i : points.index_range()) {
const int point = points[i];
const int bezier_point = bezier_point_range[i];
curve_or_handle_segments[point] = uint2(handles_left[bezier_point], point);
}
});
MutableSpan<uint2> right_handle_segments = lines.drop_front(points_num);
bezier_curves.foreach_index(GrainSize(512), [&](const int curve, const int pos) {
const IndexRange points = points_by_curve[curve];
const IndexRange bezier_point_range = bezier_offsets[pos];
for (const int i : points.index_range()) {
const int point = points[i];
const int bezier_point = bezier_point_range[i];
right_handle_segments[bezier_point] = uint2(handles_right[bezier_point], point);
}
});
BLI_assert(!lines.contains(uint2(std::numeric_limits<uint32_t>::min())));
GPU_indexbuf_build_in_place_ex(
&builder, 0, handles_and_points_num(points_num, bezier_offsets), false, &ibo);
}
static gpu::VertBufPtr alloc_evaluated_point_attribute_vbo(const GPUVertFormat &format,
const StringRef /*name*/,
int64_t size)
{
gpu::VertBufPtr buf = gpu::VertBufPtr(GPU_vertbuf_create_with_format_ex(
format, GPU_USAGE_DEVICE_ONLY | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY));
/* Create a destination buffer for the evaluation. Sized appropriately */
GPU_vertbuf_data_alloc(*buf, size);
return buf;
}
static gpu::VertBufPtr ensure_control_point_attribute(const bke::CurvesGeometry &curves,
const StringRef name,
const GPUVertFormat &format,
bool &r_is_point_domain)
{
gpu::VertBufPtr vbo = gpu::VertBufPtr(GPU_vertbuf_create_with_format_ex(
format, GPU_USAGE_STATIC | GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY));
const bke::AttributeAccessor attributes = curves.wrap().attributes();
/* TODO(@kevindietrich): float4 is used for scalar attributes as the implicit conversion done
* by OpenGL to float4 for a scalar `s` will produce a `float4(s, 0, 0, 1)`. However, following
* the Blender convention, it should be `float4(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. */
const bke::AttributeReader<ColorGeometry4f> attribute = attributes.lookup<ColorGeometry4f>(name);
if (!attribute) {
/* Attribute doesn't exist or is of an incompatible type.
* Replace it with a black curve domain attribute. */
/* TODO(fclem): Eventually, this should become unecessary if merge all attributes in one buffer
* and use an indirection table. */
GPU_vertbuf_data_alloc(*vbo, curves.curves_num());
vbo->data<ColorGeometry4f>().fill({0.0f, 0.0f, 0.0f, 1.0f});
r_is_point_domain = false;
return vbo;
}
r_is_point_domain = attribute.domain == bke::AttrDomain::Point;
GPU_vertbuf_data_alloc(*vbo, r_is_point_domain ? curves.points_num() : curves.curves_num());
attribute.varray.materialize(vbo->data<ColorGeometry4f>());
return vbo;
}
static std::optional<StringRef> get_first_uv_name(const bke::AttributeAccessor &attributes)
{
std::optional<StringRef> name;
attributes.foreach_attribute([&](const bke::AttributeIter &iter) {
if (iter.data_type == bke::AttrType::Float2) {
name = iter.name;
iter.stop();
}
});
return name;
}
static void request_attribute(Curves &curves, const StringRef name)
{
CurvesEvalCache &cache = get_batch_cache(curves).eval_cache;
VectorSet<std::string> attributes{};
bke::CurvesGeometry &curves_geometry = curves.geometry.wrap();
if (!curves_geometry.attributes().contains(name)) {
return;
}
drw_attributes_add_request(&attributes, name);
drw_attributes_merge(&cache.attr_used, &attributes);
}
void drw_curves_get_attribute_sampler_name(const StringRef 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_utf8(r_sampler_name, 32, "a%s", attr_safe_name);
}
void CurvesEvalCache::ensure_attribute(CurvesModule &module,
const bke::CurvesGeometry &curves,
const StringRef name,
const int index)
{
char sampler_name[32];
drw_curves_get_attribute_sampler_name(name, sampler_name);
GPUVertFormat format = {0};
/* All attributes use float4, see comment below. */
/* TODO(fclem): Other types. */
GPU_vertformat_attr_add(&format, sampler_name, blender::gpu::VertAttrType::SFLOAT_32_32_32_32);
gpu::VertBufPtr attr_buf = ensure_control_point_attribute(
curves, name, format, attributes_point_domain[index]);
/* Existing final data may have been for a different attribute (with a different name or domain),
* free the data. */
this->evaluated_attributes_buf[index].reset();
/* Ensure final data for points. */
if (attributes_point_domain[index]) {
this->ensure_common(curves);
if (curves.has_curve_with_type(CURVE_TYPE_BEZIER)) {
this->ensure_bezier(curves);
}
if (curves.has_curve_with_type(CURVE_TYPE_NURBS)) {
this->ensure_nurbs(curves);
}
this->evaluated_attributes_buf[index] = alloc_evaluated_point_attribute_vbo(
format, name, evaluated_point_count_with_cyclic(curves));
module.evaluate_curve_attribute(curves.has_curve_with_type(CURVE_TYPE_CATMULL_ROM),
curves.has_curve_with_type(CURVE_TYPE_BEZIER),
curves.has_curve_with_type(CURVE_TYPE_POLY),
curves.has_curve_with_type(CURVE_TYPE_NURBS),
curves.has_cyclic_curve(),
curves.curves_num(),
*this,
CURVES_EVAL_FLOAT4,
std::move(attr_buf),
this->evaluated_attributes_buf[index]);
}
else {
this->curve_attributes_buf[index] = std::move(attr_buf);
}
}
void CurvesEvalCache::ensure_attributes(CurvesModule &module,
const bke::CurvesGeometry &curves,
const GPUMaterial *gpu_material)
{
const bke::AttributeAccessor attributes = curves.attributes();
if (gpu_material) {
VectorSet<std::string> attrs_needed;
ListBase gpu_attrs = GPU_material_attributes(gpu_material);
LISTBASE_FOREACH (GPUMaterialAttribute *, gpu_attr, &gpu_attrs) {
StringRef name = gpu_attr->name;
if (name.is_empty()) {
if (std::optional<StringRef> uv_name = get_first_uv_name(attributes)) {
drw_attributes_add_request(&attrs_needed, *uv_name);
}
}
if (!attributes.contains(name)) {
continue;
}
drw_attributes_add_request(&attrs_needed, name);
}
if (!drw_attributes_overlap(&attr_used, &attrs_needed)) {
/* Some new attributes have been added, free all and start over. */
for (const int i : IndexRange(GPU_MAX_ATTR)) {
this->curve_attributes_buf[i].reset();
this->evaluated_attributes_buf[i].reset();
}
drw_attributes_merge(&attr_used, &attrs_needed);
}
drw_attributes_merge(&attr_used_over_time, &attrs_needed);
}
for (const int i : attr_used.index_range()) {
if (this->curve_attributes_buf[i] || this->evaluated_attributes_buf[i]) {
continue;
}
ensure_attribute(module, curves, attr_used[i], i);
}
}
void CurvesEvalCache::ensure_common(const bke::CurvesGeometry &curves)
{
if (this->points_by_curve_buf) {
return;
}
this->points_by_curve_buf = gpu::VertBuf::from_span(curves.points_by_curve().data());
this->evaluated_points_by_curve_buf = gpu::VertBuf::from_span(
curves.evaluated_points_by_curve().data());
/* TODO(fclem): Optimize shaders to avoid needing to upload this data if data is uniform.
* This concerns all varray. */
this->curves_type_buf = gpu::VertBuf::from_varray(curves.curve_types());
this->curves_resolution_buf = gpu::VertBuf::from_varray(curves.resolution());
this->curves_cyclic_buf = gpu::VertBuf::from_varray(curves.cyclic());
}
void CurvesEvalCache::ensure_bezier(const bke::CurvesGeometry &curves)
{
if (this->handles_positions_left_buf) {
return;
}
const Span<float3> left = curves.handle_positions_left().value_or(curves.positions());
const Span<float3> right = curves.handle_positions_right().value_or(curves.positions());
this->handles_positions_left_buf = gpu::VertBuf::from_span(left);
this->handles_positions_right_buf = gpu::VertBuf::from_span(right);
this->bezier_offsets_buf = gpu::VertBuf::from_span(
curves.runtime->evaluated_offsets_cache.data().all_bezier_offsets.as_span());
}
void CurvesEvalCache::ensure_nurbs(const bke::CurvesGeometry &curves)
{
if (curves_order_buf) {
return;
}
using BasisCache = bke::curves::nurbs::BasisCache;
/* TODO(fclem): Optimize shaders to avoid needing to upload this data if data is uniform.
* This concerns all varray. */
this->curves_order_buf = gpu::VertBuf::from_varray(curves.nurbs_orders());
if (curves.nurbs_weights().has_value()) {
this->control_weights_buf = gpu::VertBuf::from_span(curves.nurbs_weights().value());
}
curves.ensure_can_interpolate_to_evaluated();
const Span<BasisCache> nurbs_basis_cache = curves.runtime->nurbs_basis_cache.data();
Vector<int> basis_cache_offset;
Vector<uint32_t> basis_cache_packed;
for (const BasisCache &cache : nurbs_basis_cache) {
basis_cache_offset.append(cache.invalid ? -1 : basis_cache_packed.size());
if (!cache.invalid) {
basis_cache_packed.extend(cache.start_indices.as_span().cast<uint32_t>());
basis_cache_packed.extend(cache.weights.as_span().cast<uint32_t>());
}
}
/* Ensure buffer is not empty. */
if (basis_cache_packed.is_empty()) {
basis_cache_packed.append(0);
}
this->basis_cache_offset_buf = gpu::VertBuf::from_span(basis_cache_offset.as_span());
this->basis_cache_buf = gpu::VertBuf::from_span(basis_cache_packed.as_span());
}
int CurvesEvalCache::evaluated_point_count_with_cyclic(const bke::CurvesGeometry &curves)
{
if (curves.has_cyclic_curve()) {
return curves.evaluated_points_num() + curves.curves_num();
}
return curves.evaluated_points_num();
}
void CurvesEvalCache::ensure_positions(CurvesModule &module, const bke::CurvesGeometry &curves)
{
if (evaluated_pos_rad_buf) {
return;
}
if (curves.is_empty()) {
/* Can happen when called from `curves_pos_buffer_get()`. Caller has to deal with nullptr. */
return;
}
this->ensure_common(curves);
if (curves.has_curve_with_type(CURVE_TYPE_BEZIER)) {
this->ensure_bezier(curves);
}
if (curves.has_curve_with_type(CURVE_TYPE_NURBS)) {
this->ensure_nurbs(curves);
}
/* TODO(fclem): Optimize shaders to avoid needing to upload this data if data is uniform.
* This concerns all varray. */
gpu::VertBufPtr points_pos_buf = gpu::VertBuf::from_span(curves.positions());
gpu::VertBufPtr points_rad_buf = gpu::VertBuf::from_varray(curves.radius());
this->evaluated_pos_rad_buf = gpu::VertBuf::device_only<float4>(
evaluated_point_count_with_cyclic(curves));
module.evaluate_positions(curves.has_curve_with_type(CURVE_TYPE_CATMULL_ROM),
curves.has_curve_with_type(CURVE_TYPE_BEZIER),
curves.has_curve_with_type(CURVE_TYPE_POLY),
curves.has_curve_with_type(CURVE_TYPE_NURBS),
curves.has_cyclic_curve(),
curves.curves_num(),
*this,
std::move(points_pos_buf),
std::move(points_rad_buf),
evaluated_pos_rad_buf);
/* TODO(fclem): Make time and length optional. */
this->evaluated_time_buf = gpu::VertBuf::device_only<float>(
evaluated_point_count_with_cyclic(curves));
this->curves_length_buf = gpu::VertBuf::device_only<float>(curves.curves_num());
module.evaluate_curve_length_intercept(curves.has_cyclic_curve(), curves.curves_num(), *this);
}
gpu::VertBufPtr &CurvesEvalCache::indirection_buf_get(CurvesModule &module,
const bke::CurvesGeometry &curves,
const int face_per_segment)
{
const bool is_ribbon = face_per_segment < 2;
gpu::VertBufPtr &indirection_buf = is_ribbon ? this->indirection_ribbon_buf :
this->indirection_cylinder_buf;
if (indirection_buf) {
return indirection_buf;
}
this->ensure_common(curves);
indirection_buf = module.evaluate_topology_indirection(curves.curves_num(),
curves.evaluated_points_num(),
*this,
is_ribbon,
curves.has_cyclic_curve());
return indirection_buf;
}
gpu::Batch *CurvesEvalCache::batch_get(const int evaluated_point_count,
const int curve_count,
const int face_per_segment,
const bool use_cyclic)
{
gpu::Batch *&batch = this->batch[face_per_segment];
if (batch) {
return batch;
}
if (face_per_segment == 0) {
/* Add one point per curve to restart the primitive. */
int segment_count = evaluated_point_count + curve_count;
if (use_cyclic) {
segment_count += curve_count;
}
batch = GPU_batch_create_procedural(GPU_PRIM_LINE_STRIP, segment_count);
}
else if (face_per_segment == 1) {
/* Add one point per curve to restart the primitive. */
int segment_count = evaluated_point_count + curve_count;
if (use_cyclic) {
segment_count += curve_count;
}
/* Add one point per curve to restart the primitive. */
batch = GPU_batch_create_procedural(GPU_PRIM_TRI_STRIP, segment_count * 2);
}
else if (face_per_segment >= 2) {
int segment_count = evaluated_point_count - curve_count;
if (use_cyclic) {
segment_count += curve_count;
}
/* Add one vertex per segment to restart the primitive. */
int vert_per_segment = (face_per_segment + 1) * 2 + 1;
batch = GPU_batch_create_procedural(GPU_PRIM_TRI_STRIP, segment_count * vert_per_segment);
}
return batch;
}
CurvesEvalCache &curves_get_eval_cache(Curves &curves_id)
{
return get_batch_cache(curves_id).eval_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_validate(Curves *curves)
{
if (!batch_cache_is_dirty(*curves)) {
clear_batch_cache(*curves);
init_batch_cache(*curves);
}
}
void DRW_curves_batch_cache_free(Curves *curves)
{
clear_batch_cache(*curves);
CurvesBatchCache *batch_cache = static_cast<CurvesBatchCache *>(curves->batch_cache);
MEM_delete(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;
CurvesEvalCache &eval_cache = cache->eval_cache;
if (drw_attributes_overlap(&eval_cache.attr_used_over_time, &eval_cache.attr_used)) {
eval_cache.last_attr_matching_time = ctime;
}
if (ctime - eval_cache.last_attr_matching_time > U.vbotimeout) {
do_discard = true;
}
eval_cache.attr_used_over_time.clear();
if (do_discard) {
cache->eval_cache.discard_attributes();
}
}
gpu::Batch *DRW_curves_batch_cache_get_edit_points(Curves *curves)
{
CurvesBatchCache &cache = get_batch_cache(*curves);
return DRW_batch_request(&cache.edit_points);
}
gpu::Batch *DRW_curves_batch_cache_get_sculpt_curves_cage(Curves *curves)
{
CurvesBatchCache &cache = get_batch_cache(*curves);
return DRW_batch_request(&cache.sculpt_cage);
}
gpu::Batch *DRW_curves_batch_cache_get_edit_curves_handles(Curves *curves)
{
CurvesBatchCache &cache = get_batch_cache(*curves);
return DRW_batch_request(&cache.edit_handles);
}
gpu::Batch *DRW_curves_batch_cache_get_edit_curves_lines(Curves *curves)
{
CurvesBatchCache &cache = get_batch_cache(*curves);
return DRW_batch_request(&cache.edit_curves_lines);
}
gpu::VertBufPtr &DRW_curves_texture_for_evaluated_attribute(Curves *curves,
const StringRef name,
bool &r_is_point_domain,
bool &r_valid_attribute)
{
CurvesEvalCache &cache = get_batch_cache(*curves).eval_cache;
request_attribute(*curves, name);
/* TODO(fclem): Remove Global access. */
CurvesModule &module = *drw_get().data->curves_module;
cache.ensure_attributes(module, curves->geometry.wrap(), nullptr);
for (const int i : cache.attr_used.index_range()) {
if (cache.attr_used[i] == name) {
r_valid_attribute = true;
if (cache.attributes_point_domain[i]) {
r_is_point_domain = true;
return cache.evaluated_attributes_buf[i];
}
r_is_point_domain = false;
return cache.curve_attributes_buf[i];
}
}
r_valid_attribute = false;
r_is_point_domain = false;
return cache.evaluated_attributes_buf[0];
}
static void create_edit_points_position_vbo(
const bke::CurvesGeometry &curves,
const bke::crazyspace::GeometryDeformation & /*deformation*/,
CurvesBatchCache &cache)
{
static const GPUVertFormat format = GPU_vertformat_from_attribute(
"pos", gpu::VertAttrType::SFLOAT_32_32_32);
/* TODO: Deform curves using deformations. */
const Span<float3> positions = curves.evaluated_positions();
GPU_vertbuf_init_with_format(*cache.edit_curves_lines_pos, format);
GPU_vertbuf_data_alloc(*cache.edit_curves_lines_pos, positions.size());
cache.edit_curves_lines_pos->data<float3>().copy_from(positions);
}
void DRW_curves_batch_cache_create_requested(Object *ob)
{
Curves &curves_id = DRW_object_get_data_for_drawing<Curves>(*ob);
Object *ob_orig = DEG_get_original(ob);
if (ob_orig == nullptr) {
return;
}
const Curves &curves_orig_id = DRW_object_get_data_for_drawing<Curves>(*ob_orig);
draw::CurvesBatchCache &cache = draw::get_batch_cache(curves_id);
const bke::CurvesGeometry &curves_orig = curves_orig_id.geometry.wrap();
bool is_edit_data_needed = false;
if (DRW_batch_requested(cache.edit_points, GPU_PRIM_POINTS)) {
DRW_vbo_request(cache.edit_points, &cache.edit_points_pos);
DRW_vbo_request(cache.edit_points, &cache.edit_points_data);
DRW_vbo_request(cache.edit_points, &cache.edit_points_selection);
is_edit_data_needed = true;
}
if (DRW_batch_requested(cache.sculpt_cage, GPU_PRIM_LINE_STRIP)) {
DRW_ibo_request(cache.sculpt_cage, &cache.sculpt_cage_ibo);
DRW_vbo_request(cache.sculpt_cage, &cache.edit_points_pos);
DRW_vbo_request(cache.sculpt_cage, &cache.edit_points_data);
DRW_vbo_request(cache.sculpt_cage, &cache.edit_points_selection);
is_edit_data_needed = true;
}
if (DRW_batch_requested(cache.edit_handles, GPU_PRIM_LINES)) {
DRW_ibo_request(cache.edit_handles, &cache.edit_handles_ibo);
DRW_vbo_request(cache.edit_handles, &cache.edit_points_pos);
DRW_vbo_request(cache.edit_handles, &cache.edit_points_data);
DRW_vbo_request(cache.edit_handles, &cache.edit_points_selection);
is_edit_data_needed = true;
}
if (DRW_batch_requested(cache.edit_curves_lines, GPU_PRIM_LINE_STRIP)) {
DRW_vbo_request(cache.edit_curves_lines, &cache.edit_curves_lines_pos);
DRW_ibo_request(cache.edit_curves_lines, &cache.edit_curves_lines_ibo);
}
const OffsetIndices<int> points_by_curve = curves_orig.points_by_curve();
const VArray<bool> cyclic = curves_orig.cyclic();
const bke::crazyspace::GeometryDeformation deformation =
is_edit_data_needed || DRW_vbo_requested(cache.edit_curves_lines_pos) ?
bke::crazyspace::get_evaluated_curves_deformation(ob, *ob_orig) :
bke::crazyspace::GeometryDeformation();
if (DRW_ibo_requested(cache.sculpt_cage_ibo)) {
create_lines_ibo_no_cyclic(points_by_curve, *cache.sculpt_cage_ibo);
}
if (DRW_vbo_requested(cache.edit_curves_lines_pos)) {
create_edit_points_position_vbo(curves_orig, deformation, cache);
}
if (DRW_ibo_requested(cache.edit_curves_lines_ibo)) {
create_lines_ibo_with_cyclic(
curves_orig.evaluated_points_by_curve(), cyclic, *cache.edit_curves_lines_ibo);
}
if (!is_edit_data_needed) {
return;
}
const IndexRange curves_range = curves_orig.curves_range();
const VArray<int8_t> curve_types = curves_orig.curve_types();
const std::array<int, CURVE_TYPES_NUM> type_counts = curves_orig.curve_type_counts();
const bke::AttributeAccessor attributes = curves_orig.attributes();
IndexMaskMemory memory;
const IndexMask catmull_rom_curves = bke::curves::indices_for_type(
curve_types, type_counts, CURVE_TYPE_CATMULL_ROM, curves_range, memory);
const IndexMask poly_curves = bke::curves::indices_for_type(
curve_types, type_counts, CURVE_TYPE_POLY, curves_range, memory);
const IndexMask bezier_curves = bke::curves::indices_for_type(
curve_types, type_counts, CURVE_TYPE_BEZIER, curves_range, memory);
const IndexMask nurbs_curves = bke::curves::indices_for_type(
curve_types, type_counts, CURVE_TYPE_NURBS, curves_range, memory);
Array<int> bezier_point_offset_data(bezier_curves.size() + 1);
const OffsetIndices<int> bezier_offsets = offset_indices::gather_selected_offsets(
points_by_curve, bezier_curves, bezier_point_offset_data);
if (DRW_vbo_requested(cache.edit_points_pos)) {
create_edit_points_position(curves_orig,
points_by_curve,
bezier_curves,
bezier_offsets,
deformation,
*cache.edit_points_pos);
}
if (DRW_vbo_requested(cache.edit_points_data)) {
create_edit_points_data(points_by_curve,
catmull_rom_curves,
poly_curves,
bezier_curves,
nurbs_curves,
bezier_offsets,
curves_orig,
*cache.edit_points_data);
}
if (DRW_vbo_requested(cache.edit_points_selection)) {
create_edit_points_selection(
points_by_curve, bezier_curves, bezier_offsets, attributes, *cache.edit_points_selection);
}
if (DRW_ibo_requested(cache.edit_handles_ibo)) {
calc_edit_handles_ibo(points_by_curve,
catmull_rom_curves,
poly_curves,
bezier_curves,
nurbs_curves,
bezier_offsets,
cyclic,
*cache.edit_handles_ibo);
}
}
} // namespace blender::draw
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