4da580236b
Previously, the attribute accessor were defined in the `geometry_component_*.cc` files. This made sense back in the day, because this attribute API was only used through `GeometryComponent`. However, nowadays this attribute API is independent of `GeometryComponent`. E.g. one can use `mesh.attributes()` without ever creating a component. The refactor contains the following changes: * Move attribute accessors to separate files for each geometry type. E.g. from `geometry_component_mesh.cc` to `mesh_attributes.cc`. * Move implementations of e.g. `Mesh::attributes()` to `mesh.cc`. * Provide access to the `AttributeAccessorFunctions` without actually having a geometry. This will be useful to e.g. implement `attribute_is_builtin_on_component_type` without dummy components. Pull Request: https://projects.blender.org/blender/blender/pulls/130516
86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
/* SPDX-FileCopyrightText: 2024 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "BKE_grease_pencil.hh"
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#include "DNA_grease_pencil_types.h"
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#include "attribute_access_intern.hh"
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namespace blender ::bke::greasepencil {
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static GeometryAttributeProviders create_attribute_providers_for_grease_pencil()
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{
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static CustomDataAccessInfo layers_access = {
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[](void *owner) -> CustomData * {
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GreasePencil &grease_pencil = *static_cast<GreasePencil *>(owner);
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return &grease_pencil.layers_data;
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},
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[](const void *owner) -> const CustomData * {
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const GreasePencil &grease_pencil = *static_cast<const GreasePencil *>(owner);
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return &grease_pencil.layers_data;
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},
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[](const void *owner) -> int {
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const GreasePencil &grease_pencil = *static_cast<const GreasePencil *>(owner);
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return grease_pencil.layers().size();
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}};
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static CustomDataAttributeProvider layer_custom_data(AttrDomain::Layer, layers_access);
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return GeometryAttributeProviders({}, {&layer_custom_data});
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}
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static GVArray adapt_grease_pencil_attribute_domain(const GreasePencil & /*grease_pencil*/,
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const GVArray &varray,
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const AttrDomain from,
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const AttrDomain to)
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{
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if (from == to) {
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return varray;
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}
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return {};
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}
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static AttributeAccessorFunctions get_grease_pencil_accessor_functions()
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{
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static const GeometryAttributeProviders providers =
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create_attribute_providers_for_grease_pencil();
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AttributeAccessorFunctions fn =
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attribute_accessor_functions::accessor_functions_for_providers<providers>();
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fn.domain_size = [](const void *owner, const AttrDomain domain) {
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if (owner == nullptr) {
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return 0;
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}
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const GreasePencil &grease_pencil = *static_cast<const GreasePencil *>(owner);
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switch (domain) {
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case AttrDomain::Layer:
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return int(grease_pencil.layers().size());
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default:
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return 0;
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}
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};
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fn.domain_supported = [](const void * /*owner*/, const AttrDomain domain) {
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return domain == AttrDomain::Layer;
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};
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fn.adapt_domain = [](const void *owner,
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const GVArray &varray,
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const AttrDomain from_domain,
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const AttrDomain to_domain) -> GVArray {
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if (owner == nullptr) {
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return {};
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}
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const GreasePencil &grease_pencil = *static_cast<const GreasePencil *>(owner);
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return adapt_grease_pencil_attribute_domain(grease_pencil, varray, from_domain, to_domain);
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};
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return fn;
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}
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const AttributeAccessorFunctions &get_attribute_accessor_functions()
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{
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static const AttributeAccessorFunctions fn = get_grease_pencil_accessor_functions();
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return fn;
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}
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} // namespace blender::bke::greasepencil
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