1 /* $Id: s_span.h,v 1.19 2003/03/25 02:23:47 brianp Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
37 _swrast_span_default_z( GLcontext
*ctx
, struct sw_span
*span
);
40 _swrast_span_interpolate_z( const GLcontext
*ctx
, struct sw_span
*span
);
43 _swrast_span_default_fog( GLcontext
*ctx
, struct sw_span
*span
);
46 _swrast_span_default_color( GLcontext
*ctx
, struct sw_span
*span
);
49 _swrast_span_default_texcoords( GLcontext
*ctx
, struct sw_span
*span
);
52 _swrast_compute_lambda(GLfloat dsdx
, GLfloat dsdy
, GLfloat dtdx
, GLfloat dtdy
,
53 GLfloat dqdx
, GLfloat dqdy
, GLfloat texW
, GLfloat texH
,
54 GLfloat s
, GLfloat t
, GLfloat q
, GLfloat invQ
);
57 _swrast_write_index_span( GLcontext
*ctx
, struct sw_span
*span
);
61 _swrast_write_rgba_span( GLcontext
*ctx
, struct sw_span
*span
);
65 _swrast_write_texture_span( GLcontext
*ctx
, struct sw_span
*span
);
69 _swrast_read_rgba_span( GLcontext
*ctx
, GLframebuffer
*buffer
,
70 GLuint n
, GLint x
, GLint y
, GLchan rgba
[][4] );
73 _swrast_read_index_span( GLcontext
*ctx
, GLframebuffer
*buffer
,
74 GLuint n
, GLint x
, GLint y
, GLuint indx
[] );