1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999 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.
*
* Authors:
* Keith Whitwell <keithw@valinux.com>
*/
#ifndef S_CONTEXT_H
#define S_CONTEXT_H
#include "mtypes.h"
#include "swrast.h"
/*
* For texture sampling:
*/
typedef void (*TextureSampleFunc)( GLcontext *ctx, GLuint texUnit,
const struct gl_texture_object *tObj,
GLuint n,
const GLfloat s[], const GLfloat t[],
const GLfloat u[], const GLfloat lambda[],
GLchan rgba[][4] );
/*
* Blending function
*/
#ifdef USE_MMX_ASM
typedef void (_ASMAPIP blend_func)( GLcontext *ctx, GLuint n,
const GLubyte mask[],
GLchan src[][4], CONST GLchan dst[][4] );
#else
typedef void (*blend_func)( GLcontext *ctx, GLuint n, const GLubyte mask[],
GLchan src[][4], CONST GLchan dst[][4] );
#endif
typedef void (*swrast_point_func)( GLcontext *ctx, const SWvertex *);
typedef void (*swrast_line_func)( GLcontext *ctx,
const SWvertex *, const SWvertex *);
typedef void (*swrast_tri_func)( GLcontext *ctx, const SWvertex *,
const SWvertex *, const SWvertex *);
typedef void (*swrast_quad_func)( GLcontext *ctx,
const SWvertex *, const SWvertex *,
const SWvertex *, const SWvertex *);
/*
* Bitmasks to indicate which rasterization options are enabled (RasterMask)
*/
#define ALPHATEST_BIT 0x001 /* Alpha-test pixels */
#define BLEND_BIT 0x002 /* Blend pixels */
#define DEPTH_BIT 0x004 /* Depth-test pixels */
#define FOG_BIT 0x008 /* Fog pixels */
#define LOGIC_OP_BIT 0x010 /* Apply logic op in software */
#define SCISSOR_BIT 0x020 /* Scissor pixels */
#define STENCIL_BIT 0x040 /* Stencil pixels */
#define MASKING_BIT 0x080 /* Do glColorMask or glIndexMask */
#define ALPHABUF_BIT 0x100 /* Using software alpha buffer */
#define WINCLIP_BIT 0x200 /* Clip pixels/primitives to window */
#define MULTI_DRAW_BIT 0x400 /* Write to more than one color- */
/* buffer or no buffers. */
#define OCCLUSION_BIT 0x800 /* GL_HP_occlusion_test enabled */
#define TEXTURE_BIT 0x1000 /* Texturing really enabled */
#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS| \
_NEW_SCISSOR| \
_NEW_COLOR| \
_NEW_DEPTH| \
_NEW_FOG| \
_NEW_STENCIL| \
_NEW_TEXTURE| \
_NEW_VIEWPORT| \
_NEW_DEPTH)
typedef struct
{
/* Configuration mechanisms to make software rasterizer match
* characteristics of the hardware rasterizer (if present):
*/
GLboolean AllowVertexFog;
GLboolean AllowPixelFog;
/* Derived values, invalidated on statechanges, updated from
* _swrast_validate_derived():
*/
GLuint _RasterMask;
GLboolean _MultiTextureEnabled;
GLuint _MinMagThresh[MAX_TEXTURE_UNITS];
GLfloat _backface_sign;
GLboolean _PreferPixelFog;
/* Accum buffer temporaries.
*/
GLboolean _IntegerAccumMode; /* Storing unscaled integers? */
GLfloat _IntegerAccumScaler; /* Implicit scale factor */
/* Working values:
*/
struct pixel_buffer* PB;
GLuint StippleCounter; /* Line stipple counter */
GLuint NewState;
GLuint StateChanges;
/* Mechanism to allow driver (like X11) to register further
* software rasterization routines.
*/
void (*choose_point)( GLcontext * );
void (*choose_line)( GLcontext * );
void (*choose_triangle)( GLcontext * );
void (*choose_quad)( GLcontext * );
GLuint invalidate_point;
GLuint invalidate_line;
GLuint invalidate_triangle;
GLuint invalidate_quad;
/* Function pointers for dispatch behind public entrypoints.
*/
void (*InvalidateState)( GLcontext *ctx, GLuint new_state );
swrast_point_func Point;
swrast_line_func Line;
swrast_tri_func Triangle;
swrast_quad_func Quad;
/* Internal hooks, kept uptodate by the same mechanism as above.
*/
blend_func BlendFunc;
TextureSampleFunc TextureSample[MAX_TEXTURE_UNITS];
} SWcontext;
void
_swrast_validate_derived( GLcontext *ctx );
#define SWRAST_CONTEXT(ctx) ((SWcontext *)ctx->swrast_context)
#endif
|
