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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2019 Blender Foundation. All rights reserved. */
#pragma once
#include "IO_abstract_hierarchy_iterator.h"
#include "usd_exporter_context.h"
#include <pxr/usd/sdf/path.h>
#include <pxr/usd/usd/stage.h>
#include <pxr/usd/usdShade/material.h>
#include <pxr/usd/usdUtils/sparseValueWriter.h>
#include <vector>
#include "DEG_depsgraph_query.h"
#include "DNA_material_types.h"
struct Material;
namespace blender::io::usd {
using blender::io::AbstractHierarchyWriter;
using blender::io::HierarchyContext;
class USDAbstractWriter : public AbstractHierarchyWriter {
protected:
const USDExporterContext usd_export_context_;
pxr::UsdUtilsSparseValueWriter usd_value_writer_;
bool frame_has_been_written_;
bool is_animated_;
public:
USDAbstractWriter(const USDExporterContext &usd_export_context);
virtual void write(HierarchyContext &context) override;
/**
* Returns true if the data to be written is actually supported. This would, for example, allow a
* hypothetical camera writer accept a perspective camera but reject an orthogonal one.
*
* Returning false from a transform writer will prevent the object and all its descendants from
* being exported. Returning false from a data writer (object data, hair, or particles) will
* only prevent that data from being written (and thus cause the object to be exported as an
* Empty).
*/
virtual bool is_supported(const HierarchyContext *context) const;
const pxr::SdfPath &usd_path() const;
protected:
virtual void do_write(HierarchyContext &context) = 0;
pxr::UsdTimeCode get_export_time_code() const;
pxr::UsdShadeMaterial ensure_usd_material(const HierarchyContext &context, Material *material);
void write_visibility(const HierarchyContext &context,
const pxr::UsdTimeCode timecode,
pxr::UsdGeomImageable &usd_geometry);
/**
* Turn `prim` into an instance referencing `context.original_export_path`.
* Return true when the instancing was successful, false otherwise.
*
* Reference the original data instead of writing a copy.
*/
virtual bool mark_as_instance(const HierarchyContext &context, const pxr::UsdPrim &prim);
};
} // namespace blender::io::usd
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