s_span.h revision f493a04be0e004bb07f84b2e28124ed8cb6a9b38 
1/*
2 * Mesa 3-D graphics library
3 * Version:  6.5
4 *
5 * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26#ifndef S_SPAN_H
27#define S_SPAN_H
28
29
30#include "mtypes.h"
31#include "swrast.h"
32
33
34extern void
35_swrast_span_default_z( GLcontext *ctx, struct sw_span *span );
36
37extern void
38_swrast_span_interpolate_z( const GLcontext *ctx, struct sw_span *span );
39
40extern void
41_swrast_span_default_fog( GLcontext *ctx, struct sw_span *span );
42
43extern void
44_swrast_span_default_color( GLcontext *ctx, struct sw_span *span );
45
46extern void
47_swrast_span_default_texcoords( GLcontext *ctx, struct sw_span *span );
48
49extern GLfloat
50_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
51                       GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
52                       GLfloat s, GLfloat t, GLfloat q, GLfloat invQ);
53
54extern void
55_swrast_write_index_span( GLcontext *ctx, struct sw_span *span);
56
57
58extern void
59_swrast_write_rgba_span( GLcontext *ctx, struct sw_span *span);
60
61
62extern void
63_swrast_read_rgba_span( GLcontext *ctx, struct gl_renderbuffer *rb,
64                        GLuint n, GLint x, GLint y, GLchan rgba[][4] );
65
66extern void
67_swrast_read_index_span( GLcontext *ctx, struct gl_renderbuffer *rb,
68                         GLuint n, GLint x, GLint y, GLuint indx[] );
69
70extern void
71_swrast_get_values(GLcontext *ctx, struct gl_renderbuffer *rb,
72                   GLuint count, const GLint x[], const GLint y[],
73                   void *values, GLuint valueSize);
74
75extern void
76_swrast_put_row(GLcontext *ctx, struct gl_renderbuffer *rb,
77                GLuint count, GLint x, GLint y,
78                const GLvoid *values, GLuint valueSize);
79
80extern void
81_swrast_get_row(GLcontext *ctx, struct gl_renderbuffer *rb,
82                GLuint count, GLint x, GLint y,
83                GLvoid *values, GLuint valueSize);
84
85#endif
86