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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-runtime-lib
* Created on: 21 апр. 2017 г.
*
* lsp-runtime-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-runtime-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-runtime-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_FMT_OBJ_IOBJHANDLER_H_
#define LSP_PLUG_IN_FMT_OBJ_IOBJHANDLER_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/runtime/LSPString.h>
#include <lsp-plug.in/common/types.h>
#include <lsp-plug.in/common/status.h>
#include <lsp-plug.in/fmt/obj/const.h>
namespace lsp
{
namespace obj
{
/** File contents handler interface
*
*/
class IObjHandler
{
public:
virtual ~IObjHandler();
public:
/** Start object
*
* @param id object id
* @param name object name
* @return status of operation
*/
virtual status_t begin_object(const char *name);
/** Start object
*
* @param id object id
* @param name object name
* @return status of operation
*/
virtual status_t begin_object(const LSPString *name);
/** End object
*
* @param id object id
* @return status of operation
*/
virtual status_t end_object();
/**
* This callback is called when there is no more data at the input
* and allows to post-process/finalize loaded data structures
* @return status of operation
*/
virtual status_t end_of_data();
/** Add vertex
*
* @param idx index
* @param x vertex X coordinate
* @param y vertex Y coordinate
* @param z vertex Z coordinate
* @param w vertex W coordinate
* @return number of added vertex or negative error code
*/
virtual ssize_t add_vertex(float x, float y, float z, float w);
/** Add parameter vertex
*
* @param idx index
* @param x vertex X coordinate
* @param y vertex Y coordinate
* @param z vertex Z coordinate
* @param w vertex W coordinate
* @return number of added vertex or negative error code
*/
virtual ssize_t add_param_vertex(float x, float y, float z, float w);
/** Add normal
*
* @param nx normal x
* @param ny normal y
* @param nz normal z
* @param nw normal w
* @return number of added normal or negative error code
*/
virtual ssize_t add_normal(float nx, float ny, float nz, float nw);
/** Add texture vertex
*
* @param u texture U coordinate
* @param v texture V coordinate
* @param w texture W coordinate
* @return number of added texture vertex or negative error code
*/
virtual ssize_t add_texture_vertex(float u, float v, float w);
/** Add face
*
* @param vv array of vertex indexes starting with 0 (negative value if not present)
* @param vn array of normal indexes starting with 0 (negative value if not present)
* @param vt array of texture vertex indexes starting with 0 (negative value if not present)
* @param n number of elements in vv, vn and vt
* @return status of operation
*/
virtual status_t add_face(const index_t *vv, const index_t *vn, const index_t *vt, size_t n);
/** Add points
*
* @param vv array of vertex indexes starting with 1 (0 if not present)
* @param n number of elements in vv
* @return status of operation
*/
virtual status_t add_points(const index_t *vv, size_t n);
/** Add line
*
* @param vv array of vertex indexes starting with 0 (negative value if not present)
* @param vt array of texture vertex indexes starting with 0 (negative value if not present)
* @param n number of elements in vv
* @return status of operation
*/
virtual status_t add_line(const index_t *vv, const index_t *vt, size_t n);
};
}
} /* namespace lsp */
#endif /* LSP_PLUG_IN_FMT_OBJ_IOBJHANDLER_H_ */
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