3 * Mesa 3-D graphics library
6 * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 * Keith Whitwell <keith@tungstengraphics.com>
34 #include "tnl/t_context.h"
36 #include "ss_triangle.h"
37 #include "ss_context.h"
39 #define SS_RGBA_BIT 0x1
40 #define SS_OFFSET_BIT 0x2
41 #define SS_TWOSIDE_BIT 0x4
42 #define SS_UNFILLED_BIT 0x8
43 #define SS_MAX_TRIFUNC 0x10
45 static triangle_func tri_tab
[SS_MAX_TRIFUNC
];
46 static quad_func quad_tab
[SS_MAX_TRIFUNC
];
49 static void _swsetup_render_line_tri( GLcontext
*ctx
,
50 GLuint e0
, GLuint e1
, GLuint e2
,
53 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
54 struct vertex_buffer
*VB
= &TNL_CONTEXT(ctx
)->vb
;
55 GLubyte
*ef
= VB
->EdgeFlag
;
56 SWvertex
*verts
= swsetup
->verts
;
57 SWvertex
*v0
= &verts
[e0
];
58 SWvertex
*v1
= &verts
[e1
];
59 SWvertex
*v2
= &verts
[e2
];
65 if (ctx
->Polygon
.CullFlag
) {
66 if (facing
== 1 && ctx
->Polygon
.CullFaceMode
!= GL_FRONT
)
68 if (facing
== 0 && ctx
->Polygon
.CullFaceMode
!= GL_BACK
)
72 if (ctx
->Light
.ShadeModel
== GL_FLAT
) {
73 COPY_CHAN4(c
[0], v0
->color
);
74 COPY_CHAN4(c
[1], v1
->color
);
75 COPY_CHAN4(s
[0], v0
->specular
);
76 COPY_CHAN4(s
[1], v1
->specular
);
80 COPY_CHAN4(v0
->color
, v2
->color
);
81 COPY_CHAN4(v1
->color
, v2
->color
);
82 COPY_CHAN4(v0
->specular
, v2
->specular
);
83 COPY_CHAN4(v1
->specular
, v2
->specular
);
84 v0
->index
= v2
->index
;
85 v1
->index
= v2
->index
;
88 if (swsetup
->render_prim
== GL_POLYGON
) {
89 if (ef
[e2
]) _swrast_Line( ctx
, v2
, v0
);
90 if (ef
[e0
]) _swrast_Line( ctx
, v0
, v1
);
91 if (ef
[e1
]) _swrast_Line( ctx
, v1
, v2
);
93 if (ef
[e0
]) _swrast_Line( ctx
, v0
, v1
);
94 if (ef
[e1
]) _swrast_Line( ctx
, v1
, v2
);
95 if (ef
[e2
]) _swrast_Line( ctx
, v2
, v0
);
98 if (ctx
->Light
.ShadeModel
== GL_FLAT
) {
99 COPY_CHAN4(v0
->color
, c
[0]);
100 COPY_CHAN4(v1
->color
, c
[1]);
101 COPY_CHAN4(v0
->specular
, s
[0]);
102 COPY_CHAN4(v1
->specular
, s
[1]);
108 static void _swsetup_render_point_tri( GLcontext
*ctx
,
109 GLuint e0
, GLuint e1
, GLuint e2
,
112 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
113 struct vertex_buffer
*VB
= &TNL_CONTEXT(ctx
)->vb
;
114 GLubyte
*ef
= VB
->EdgeFlag
;
115 SWvertex
*verts
= swsetup
->verts
;
116 SWvertex
*v0
= &verts
[e0
];
117 SWvertex
*v1
= &verts
[e1
];
118 SWvertex
*v2
= &verts
[e2
];
124 if (ctx
->Polygon
.CullFlag
) {
125 if (facing
== 1 && ctx
->Polygon
.CullFaceMode
!= GL_FRONT
)
127 if (facing
== 0 && ctx
->Polygon
.CullFaceMode
!= GL_BACK
)
131 if (ctx
->Light
.ShadeModel
== GL_FLAT
) {
132 /* save colors/indexes for v0, v1 vertices */
133 COPY_CHAN4(c
[0], v0
->color
);
134 COPY_CHAN4(c
[1], v1
->color
);
135 COPY_CHAN4(s
[0], v0
->specular
);
136 COPY_CHAN4(s
[1], v1
->specular
);
140 /* copy v2 color/indexes to v0, v1 indexes */
141 COPY_CHAN4(v0
->color
, v2
->color
);
142 COPY_CHAN4(v1
->color
, v2
->color
);
143 COPY_CHAN4(v0
->specular
, v2
->specular
);
144 COPY_CHAN4(v1
->specular
, v2
->specular
);
145 v0
->index
= v2
->index
;
146 v1
->index
= v2
->index
;
149 if (ef
[e0
]) _swrast_Point( ctx
, v0
);
150 if (ef
[e1
]) _swrast_Point( ctx
, v1
);
151 if (ef
[e2
]) _swrast_Point( ctx
, v2
);
153 if (ctx
->Light
.ShadeModel
== GL_FLAT
) {
154 /* restore v0, v1 colores/indexes */
155 COPY_CHAN4(v0
->color
, c
[0]);
156 COPY_CHAN4(v1
->color
, c
[1]);
157 COPY_CHAN4(v0
->specular
, s
[0]);
158 COPY_CHAN4(v1
->specular
, s
[1]);
165 #define SS_COLOR(a,b) UNCLAMPED_FLOAT_TO_RGBA_CHAN(a,b)
166 #define SS_SPEC(a,b) UNCLAMPED_FLOAT_TO_RGB_CHAN(a,b)
167 #define SS_IND(a,b) (a = b)
171 #include "ss_tritmp.h"
173 #define IND (SS_OFFSET_BIT)
174 #define TAG(x) x##_offset
175 #include "ss_tritmp.h"
177 #define IND (SS_TWOSIDE_BIT)
178 #define TAG(x) x##_twoside
179 #include "ss_tritmp.h"
181 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT)
182 #define TAG(x) x##_offset_twoside
183 #include "ss_tritmp.h"
185 #define IND (SS_UNFILLED_BIT)
186 #define TAG(x) x##_unfilled
187 #include "ss_tritmp.h"
189 #define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT)
190 #define TAG(x) x##_offset_unfilled
191 #include "ss_tritmp.h"
193 #define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
194 #define TAG(x) x##_twoside_unfilled
195 #include "ss_tritmp.h"
197 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
198 #define TAG(x) x##_offset_twoside_unfilled
199 #include "ss_tritmp.h"
201 #define IND (0|SS_RGBA_BIT)
202 #define TAG(x) x##_rgba
203 #include "ss_tritmp.h"
205 #define IND (SS_OFFSET_BIT|SS_RGBA_BIT)
206 #define TAG(x) x##_offset_rgba
207 #include "ss_tritmp.h"
209 #define IND (SS_TWOSIDE_BIT|SS_RGBA_BIT)
210 #define TAG(x) x##_twoside_rgba
211 #include "ss_tritmp.h"
213 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_RGBA_BIT)
214 #define TAG(x) x##_offset_twoside_rgba
215 #include "ss_tritmp.h"
217 #define IND (SS_UNFILLED_BIT|SS_RGBA_BIT)
218 #define TAG(x) x##_unfilled_rgba
219 #include "ss_tritmp.h"
221 #define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
222 #define TAG(x) x##_offset_unfilled_rgba
223 #include "ss_tritmp.h"
225 #define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
226 #define TAG(x) x##_twoside_unfilled_rgba
227 #include "ss_tritmp.h"
229 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
230 #define TAG(x) x##_offset_twoside_unfilled_rgba
231 #include "ss_tritmp.h"
234 void _swsetup_trifuncs_init( GLcontext
*ctx
)
241 init_offset_twoside();
243 init_offset_unfilled();
244 init_twoside_unfilled();
245 init_offset_twoside_unfilled();
250 init_offset_twoside_rgba();
251 init_unfilled_rgba();
252 init_offset_unfilled_rgba();
253 init_twoside_unfilled_rgba();
254 init_offset_twoside_unfilled_rgba();
258 static void swsetup_points( GLcontext
*ctx
, GLuint first
, GLuint last
)
260 struct vertex_buffer
*VB
= &TNL_CONTEXT(ctx
)->vb
;
261 SWvertex
*verts
= SWSETUP_CONTEXT(ctx
)->verts
;
265 for (i
= first
; i
< last
; i
++)
266 if (VB
->ClipMask
[VB
->Elts
[i
]] == 0)
267 _swrast_Point( ctx
, &verts
[VB
->Elts
[i
]] );
270 for (i
= first
; i
< last
; i
++)
271 if (VB
->ClipMask
[i
] == 0)
272 _swrast_Point( ctx
, &verts
[i
] );
276 static void swsetup_line( GLcontext
*ctx
, GLuint v0
, GLuint v1
)
278 SWvertex
*verts
= SWSETUP_CONTEXT(ctx
)->verts
;
279 _swrast_Line( ctx
, &verts
[v0
], &verts
[v1
] );
284 void _swsetup_choose_trifuncs( GLcontext
*ctx
)
286 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
289 if (ctx
->Polygon
.OffsetPoint
||
290 ctx
->Polygon
.OffsetLine
||
291 ctx
->Polygon
.OffsetFill
)
292 ind
|= SS_OFFSET_BIT
;
294 if (ctx
->Light
.Enabled
&& ctx
->Light
.Model
.TwoSide
)
295 ind
|= SS_TWOSIDE_BIT
;
297 /* We piggyback the two-sided stencil front/back determination on the
298 * unfilled triangle path.
300 if (ctx
->Polygon
.FrontMode
!= GL_FILL
||
301 ctx
->Polygon
.BackMode
!= GL_FILL
||
302 (ctx
->Stencil
.Enabled
&& ctx
->Stencil
.TestTwoSide
))
303 ind
|= SS_UNFILLED_BIT
;
305 if (ctx
->Visual
.rgbMode
)
308 tnl
->Driver
.Render
.Triangle
= tri_tab
[ind
];
309 tnl
->Driver
.Render
.Quad
= quad_tab
[ind
];
310 tnl
->Driver
.Render
.Line
= swsetup_line
;
311 tnl
->Driver
.Render
.Points
= swsetup_points
;