xref: /xsrc/external/mit/MesaLib/dist/src/mesa/tnl/t_split.h

/*
 * mesa 3-D graphics library
 *
 * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * \brief VBO builder module datatypes and definitions.
 * \author Keith Whitwell
 */


/**
 * \mainpage The TNL splitter
 *
 * This is the private data used internally to the _tnl_split_prims()
 * helper function.  Nobody outside the _tnl_split* files needs to
 * include or know about this structure.
 */


#ifndef _TNL_SPLIT_H
#define _TNL_SPLIT_H

#include "tnl.h"


/* True if a primitive can be split without copying of vertices, false
 * otherwise.
 */
GLboolean
_tnl_split_prim_inplace(GLenum mode, GLuint *first, GLuint *incr);

void
_tnl_split_inplace(struct gl_context *ctx,
                   const struct tnl_vertex_array arrays[],
                   const struct _mesa_prim *prim,
                   GLuint nr_prims,
                   const struct _mesa_index_buffer *ib,
                   GLuint num_instances,
                   GLuint base_instance,
                   tnl_draw_func draw,
                   const struct split_limits *limits);

/* Requires ib != NULL:
 */
void
_tnl_split_copy(struct gl_context *ctx,
                const struct tnl_vertex_array arrays[],
                const struct _mesa_prim *prim,
                GLuint nr_prims,
                const struct _mesa_index_buffer *ib,
                tnl_draw_func draw,
                const struct split_limits *limits);

#endif