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/* $Id: s_span.h,v 1.18 2003/03/15 17:33:28 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 5.1
*
* Copyright (C) 1999-2003 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
* BRIAN PAUL 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 S_SPAN_H
#define S_SPAN_H
#include "mtypes.h"
#include "swrast.h"
extern void
_mesa_span_default_z( GLcontext *ctx, struct sw_span *span );
extern void
_mesa_span_interpolate_z( const GLcontext *ctx, struct sw_span *span );
extern void
_mesa_span_default_fog( GLcontext *ctx, struct sw_span *span );
extern void
_mesa_span_default_color( GLcontext *ctx, struct sw_span *span );
extern void
_mesa_span_default_texcoords( GLcontext *ctx, struct sw_span *span );
extern GLfloat
_mesa_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
GLfloat s, GLfloat t, GLfloat q, GLfloat invQ);
extern void
_mesa_write_index_span( GLcontext *ctx, struct sw_span *span);
extern void
_mesa_write_rgba_span( GLcontext *ctx, struct sw_span *span);
extern void
_mesa_write_texture_span( GLcontext *ctx, struct sw_span *span);
extern void
_mesa_read_rgba_span( GLcontext *ctx, GLframebuffer *buffer,
GLuint n, GLint x, GLint y, GLchan rgba[][4] );
extern void
_mesa_read_index_span( GLcontext *ctx, GLframebuffer *buffer,
GLuint n, GLint x, GLint y, GLuint indx[] );
#endif
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