/*
 * Copyright 2008 Tungsten Graphics, 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
 * TUNGSTEN GRAPHICS 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.
 */


/**
 * Vertex fetch/store/convert code.  This functionality is used in two places:
 * 1. Vertex fetch/convert - to grab vertex data from incoming vertex
 *    arrays and convert to format needed by vertex shaders.
 * 2. Vertex store/emit - to convert simple float[][4] vertex attributes
 *    (which is the organization used throughout the draw/prim pipeline) to
 *    hardware-specific formats and emit into hardware vertex buffers.
 *
 *
 * Authors:
 *    Keith Whitwell <keithw@tungstengraphics.com>
 */

#ifndef _TRANSLATE_H
#define _TRANSLATE_H


#include "pipe/p_compiler.h"
#include "pipe/p_format.h"
#include "pipe/p_state.h"

struct translate_element 
{
   enum pipe_format input_format;
   enum pipe_format output_format;
   unsigned input_buffer;
   unsigned input_offset;       /* can't really reduce the size of these */
   unsigned output_offset;
};


struct translate_key {
   unsigned output_stride;
   unsigned nr_elements;
   struct translate_element element[PIPE_MAX_ATTRIBS];
};


struct translate {
   struct translate_key key;

   void (*release)( struct translate * );

   void (*set_buffer)( struct translate *,
		       unsigned i,
		       const void *ptr,
		       unsigned stride );

   void (PIPE_CDECL *run_elts)( struct translate *,
                                const unsigned *elts,
                                unsigned count,
                                void *output_buffer);

   void (PIPE_CDECL *run)( struct translate *,
                           unsigned start,
                           unsigned count,
                           void *output_buffer);
};



#if 0
struct translate_context *translate_context_create( void );
void translate_context_destroy( struct translate_context * );

struct translate *translate_lookup_or_create( struct translate_context *tctx,
					      const struct translate_key *key );
#endif


struct translate *translate_create( const struct translate_key *key );

static INLINE int translate_keysize( const struct translate_key *key )
{
   return 2 * sizeof(int) + key->nr_elements * sizeof(struct translate_element);
}

static INLINE int translate_key_compare( const struct translate_key *a,
                                         const struct translate_key *b )
{
   int keysize = translate_keysize(a);
   return memcmp(a, b, keysize);
}


static INLINE void translate_key_sanitize( struct translate_key *a )
{
   int keysize = translate_keysize(a);
   char *ptr = (char *)a;
   memset(ptr + keysize, 0, sizeof(*a) - keysize);
}


/*******************************************************************************
 *  Private:
 */
struct translate *translate_sse2_create( const struct translate_key *key );

struct translate *translate_generic_create( const struct translate_key *key );


#endif
