/*
 * Copyright 2003 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.
 *
 * Authors:
 *    Keith Whitwell <keithw@tungstengraphics.com>
 */

#ifndef _TNL_VERTEX_H
#define _TNL_VERTEX_H

/* New mechanism to specify hardware vertices so that tnl can build
 * and manipulate them directly.  
 */

enum tnl_attr_format {
   EMIT_1F = 1,
   EMIT_2F = 2,
   EMIT_3F = 3,
   EMIT_4F = 4,
   EMIT_2F_VIEWPORT,		/* do viewport transform and emit */
   EMIT_3F_VIEWPORT,		/* do viewport transform and emit */
   EMIT_4F_VIEWPORT,		/* do viewport transform and emit */
   EMIT_3F_XYW,			/* for projective texture */
   EMIT_1UB_1F,			/* for fog coordinate */
   EMIT_3UB_3F_BGR,		/* for specular color */
   EMIT_3UB_3F_RGB,		/* for specular color */
   EMIT_4UB_4F_BGRA,		/* for color */
   EMIT_4UB_4F_RGBA,		/* for color */
   EMIT_NOP_1F,
   EMIT_NOP_1UB,
};

struct tnl_attr_map {
   GLuint attr;			/* VERT_ATTRIB_ enum */
   enum tnl_attr_format format;
};
   

/* Emit hardware vertices to a given buffer:
 */
extern void _tnl_emit( GLcontext *ctx,
		       GLuint start, GLuint end,
		       void *dest,
		       GLuint stride );

/* Interpolate between two vertices to produce a third:
 */
extern void _tnl_interp( GLcontext *ctx,
			 GLfloat t,
			 GLuint edst, GLuint eout, GLuint ein,
			 GLboolean force_boundary );

/* Copy colors from one vertex to another:
 */
extern void _tnl_copy_colors(  GLcontext *ctx, GLuint edst, GLuint esrc );


/* Extract a named attribute from a hardware vertex.  Will have to
 * reverse any viewport transformation, swizzling or other conversions
 * which may have been applied:
 */
extern void _tnl_get_attr( GLcontext *ctx, void *vertex, GLenum attrib,
			   GLfloat *dest );

/* Populate a swrast SWvertex from an attrib-style vertex.
 */
extern void _tnl_translate( GLcontext *ctx, const void *vertex, 
			    SWvertex *dest );



#endif