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/*
* Copyright 2009 VMware, Inc.
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 (including the next
* paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* VMWARE AND/OR THEIR SUPPLIERS 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.
*/
#ifndef U_INDICES_H
#define U_INDICES_H
#include "pipe/p_compiler.h"
#define PV_FIRST 0
#define PV_LAST 1
#define PV_COUNT 2
/* primitive restart disable/enable flags */
#define PR_DISABLE 0
#define PR_ENABLE 1
#define PR_COUNT 2
/**
* Index translator function (for glDrawElements() case)
*
* \param in the input index buffer
* \param start the index of the first vertex (pipe_draw_info::start)
* \param nr the number of vertices (pipe_draw_info::count)
* \param out output buffer big enough or nr vertices (of
* @out_index_size bytes each)
*/
typedef void (*u_translate_func)( const void *in,
unsigned start,
unsigned in_nr,
unsigned out_nr,
unsigned restart_index,
void *out );
/**
* Index generator function (for glDrawArrays() case)
*
* \param start the index of the first vertex (pipe_draw_info::start)
* \param nr the number of vertices (pipe_draw_info::count)
* \param out output buffer big enough or nr vertices (of
* @out_index_size bytes each)
*/
typedef void (*u_generate_func)( unsigned start,
unsigned nr,
void *out );
/* Return codes describe the translate/generate operation. Caller may
* be able to reuse translated indices under some circumstances.
*/
#define U_TRANSLATE_ERROR -1
#define U_TRANSLATE_NORMAL 1
#define U_TRANSLATE_MEMCPY 2
#define U_GENERATE_LINEAR 3
#define U_GENERATE_REUSABLE 4
#define U_GENERATE_ONE_OFF 5
void u_index_init( void );
int u_index_translator( unsigned hw_mask,
unsigned prim,
unsigned in_index_size,
unsigned nr,
unsigned in_pv, /* API */
unsigned out_pv, /* hardware */
unsigned prim_restart,
unsigned *out_prim,
unsigned *out_index_size,
unsigned *out_nr,
u_translate_func *out_translate );
/* Note that even when generating it is necessary to know what the
* API's PV is, as the indices generated will depend on whether it is
* the same as hardware or not, and in the case of triangle strips,
* whether it is first or last.
*/
int u_index_generator( unsigned hw_mask,
unsigned prim,
unsigned start,
unsigned nr,
unsigned in_pv, /* API */
unsigned out_pv, /* hardware */
unsigned *out_prim,
unsigned *out_index_size,
unsigned *out_nr,
u_generate_func *out_generate );
void u_unfilled_init( void );
int u_unfilled_translator( unsigned prim,
unsigned in_index_size,
unsigned nr,
unsigned unfilled_mode,
unsigned *out_prim,
unsigned *out_index_size,
unsigned *out_nr,
u_translate_func *out_translate );
int u_unfilled_generator( unsigned prim,
unsigned start,
unsigned nr,
unsigned unfilled_mode,
unsigned *out_prim,
unsigned *out_index_size,
unsigned *out_nr,
u_generate_func *out_generate );
#endif
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