2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
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:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
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.
25 * Keith Whitwell <keith@tungstengraphics.com>
28 #include "main/glheader.h"
29 #include "main/colormac.h"
30 #include "main/macros.h"
31 #include "main/mtypes.h"
33 #include "tnl/t_context.h"
35 #include "ss_triangle.h"
36 #include "ss_context.h"
38 #define SS_OFFSET_BIT 0x1
39 #define SS_TWOSIDE_BIT 0x2
40 #define SS_UNFILLED_BIT 0x4
41 #define SS_MAX_TRIFUNC 0x8
43 static tnl_triangle_func tri_tab
[SS_MAX_TRIFUNC
];
44 static tnl_quad_func quad_tab
[SS_MAX_TRIFUNC
];
48 * Render a triangle respecting edge flags.
50 typedef void (* swsetup_edge_render_prim_tri
)(struct gl_context
*ctx
,
60 * Render a triangle using lines and respecting edge flags.
63 _swsetup_edge_render_line_tri(struct gl_context
*ctx
,
72 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
74 if (swsetup
->render_prim
== GL_POLYGON
) {
75 if (ef
[e2
]) _swrast_Line( ctx
, v2
, v0
);
76 if (ef
[e0
]) _swrast_Line( ctx
, v0
, v1
);
77 if (ef
[e1
]) _swrast_Line( ctx
, v1
, v2
);
79 if (ef
[e0
]) _swrast_Line( ctx
, v0
, v1
);
80 if (ef
[e1
]) _swrast_Line( ctx
, v1
, v2
);
81 if (ef
[e2
]) _swrast_Line( ctx
, v2
, v0
);
86 * Render a triangle using points and respecting edge flags.
89 _swsetup_edge_render_point_tri(struct gl_context
*ctx
,
98 if (ef
[e0
]) _swrast_Point( ctx
, v0
);
99 if (ef
[e1
]) _swrast_Point( ctx
, v1
);
100 if (ef
[e2
]) _swrast_Point( ctx
, v2
);
106 * Render a triangle respecting cull and shade model.
108 static void _swsetup_render_tri(struct gl_context
*ctx
,
113 swsetup_edge_render_prim_tri render
)
115 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
116 struct vertex_buffer
*VB
= &TNL_CONTEXT(ctx
)->vb
;
117 GLubyte
*ef
= VB
->EdgeFlag
;
118 SWvertex
*verts
= swsetup
->verts
;
119 SWvertex
*v0
= &verts
[e0
];
120 SWvertex
*v1
= &verts
[e1
];
121 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 _swrast_SetFacing(ctx
, facing
);
133 if (ctx
->Light
.ShadeModel
== GL_FLAT
) {
137 /* save colors/indexes for v0, v1 vertices */
138 COPY_CHAN4(c
[0], v0
->color
);
139 COPY_CHAN4(c
[1], v1
->color
);
140 COPY_4V(s
[0], v0
->attrib
[FRAG_ATTRIB_COL1
]);
141 COPY_4V(s
[1], v1
->attrib
[FRAG_ATTRIB_COL1
]);
143 /* copy v2 color/indexes to v0, v1 indexes */
144 COPY_CHAN4(v0
->color
, v2
->color
);
145 COPY_CHAN4(v1
->color
, v2
->color
);
146 COPY_4V(v0
->attrib
[FRAG_ATTRIB_COL1
], v2
->attrib
[FRAG_ATTRIB_COL1
]);
147 COPY_4V(v1
->attrib
[FRAG_ATTRIB_COL1
], v2
->attrib
[FRAG_ATTRIB_COL1
]);
149 render(ctx
, ef
, e0
, e1
, e2
, v0
, v1
, v2
);
151 COPY_CHAN4(v0
->color
, c
[0]);
152 COPY_CHAN4(v1
->color
, c
[1]);
153 COPY_4V(v0
->attrib
[FRAG_ATTRIB_COL1
], s
[0]);
154 COPY_4V(v1
->attrib
[FRAG_ATTRIB_COL1
], s
[1]);
157 render(ctx
, ef
, e0
, e1
, e2
, v0
, v1
, v2
);
161 #define SS_COLOR(a,b) UNCLAMPED_FLOAT_TO_RGBA_CHAN(a,b)
162 #define SS_SPEC(a,b) COPY_4V(a,b)
163 #define SS_IND(a,b) (a = b)
166 #define TAG(x) x##_rgba
167 #include "ss_tritmp.h"
169 #define IND (SS_OFFSET_BIT)
170 #define TAG(x) x##_offset_rgba
171 #include "ss_tritmp.h"
173 #define IND (SS_TWOSIDE_BIT)
174 #define TAG(x) x##_twoside_rgba
175 #include "ss_tritmp.h"
177 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT)
178 #define TAG(x) x##_offset_twoside_rgba
179 #include "ss_tritmp.h"
181 #define IND (SS_UNFILLED_BIT)
182 #define TAG(x) x##_unfilled_rgba
183 #include "ss_tritmp.h"
185 #define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT)
186 #define TAG(x) x##_offset_unfilled_rgba
187 #include "ss_tritmp.h"
189 #define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
190 #define TAG(x) x##_twoside_unfilled_rgba
191 #include "ss_tritmp.h"
193 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
194 #define TAG(x) x##_offset_twoside_unfilled_rgba
195 #include "ss_tritmp.h"
198 void _swsetup_trifuncs_init( struct gl_context
*ctx
)
205 init_offset_twoside_rgba();
206 init_unfilled_rgba();
207 init_offset_unfilled_rgba();
208 init_twoside_unfilled_rgba();
209 init_offset_twoside_unfilled_rgba();
213 static void swsetup_points( struct gl_context
*ctx
, GLuint first
, GLuint last
)
215 struct vertex_buffer
*VB
= &TNL_CONTEXT(ctx
)->vb
;
216 SWvertex
*verts
= SWSETUP_CONTEXT(ctx
)->verts
;
220 for (i
= first
; i
< last
; i
++)
221 if (VB
->ClipMask
[VB
->Elts
[i
]] == 0)
222 _swrast_Point( ctx
, &verts
[VB
->Elts
[i
]] );
225 for (i
= first
; i
< last
; i
++)
226 if (VB
->ClipMask
[i
] == 0)
227 _swrast_Point( ctx
, &verts
[i
] );
231 static void swsetup_line( struct gl_context
*ctx
, GLuint v0
, GLuint v1
)
233 SWvertex
*verts
= SWSETUP_CONTEXT(ctx
)->verts
;
234 _swrast_Line( ctx
, &verts
[v0
], &verts
[v1
] );
239 void _swsetup_choose_trifuncs( struct gl_context
*ctx
)
241 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
244 if (ctx
->Polygon
.OffsetPoint
||
245 ctx
->Polygon
.OffsetLine
||
246 ctx
->Polygon
.OffsetFill
)
247 ind
|= SS_OFFSET_BIT
;
249 if ((ctx
->Light
.Enabled
&& ctx
->Light
.Model
.TwoSide
) ||
250 (ctx
->VertexProgram
._Current
&& ctx
->VertexProgram
.TwoSideEnabled
))
251 ind
|= SS_TWOSIDE_BIT
;
253 /* We piggyback the two-sided stencil front/back determination on the
254 * unfilled triangle path.
256 if (ctx
->Polygon
.FrontMode
!= GL_FILL
||
257 ctx
->Polygon
.BackMode
!= GL_FILL
||
258 (ctx
->Stencil
.Enabled
&& ctx
->Stencil
._TestTwoSide
))
259 ind
|= SS_UNFILLED_BIT
;
261 tnl
->Driver
.Render
.Triangle
= tri_tab
[ind
];
262 tnl
->Driver
.Render
.Quad
= quad_tab
[ind
];
263 tnl
->Driver
.Render
.Line
= swsetup_line
;
264 tnl
->Driver
.Render
.Points
= swsetup_points
;