Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
143 | giacomo | 1 | /* $Id: ss_tritmp.h,v 1.1 2003-04-29 12:46:52 giacomo Exp $ */ |
2 | |||
3 | /* |
||
4 | * Mesa 3-D graphics library |
||
5 | * Version: 5.0 |
||
6 | * |
||
7 | * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. |
||
8 | * |
||
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: |
||
15 | * |
||
16 | * The above copyright notice and this permission notice shall be included |
||
17 | * in all copies or substantial portions of the Software. |
||
18 | * |
||
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. |
||
25 | * |
||
26 | * Authors: |
||
27 | * Keith Whitwell <keith@tungstengraphics.com> |
||
28 | */ |
||
29 | |||
30 | |||
31 | static void TAG(triangle)(GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 ) |
||
32 | { |
||
33 | struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; |
||
34 | SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts; |
||
35 | SWvertex *v[3]; |
||
36 | GLfloat z[3]; |
||
37 | GLfloat offset; |
||
38 | GLenum mode = GL_FILL; |
||
39 | GLuint facing = 0; |
||
40 | |||
41 | v[0] = &verts[e0]; |
||
42 | v[1] = &verts[e1]; |
||
43 | v[2] = &verts[e2]; |
||
44 | |||
45 | |||
46 | if (IND & (SS_TWOSIDE_BIT | SS_OFFSET_BIT | SS_UNFILLED_BIT)) |
||
47 | { |
||
48 | GLfloat ex = v[0]->win[0] - v[2]->win[0]; |
||
49 | GLfloat ey = v[0]->win[1] - v[2]->win[1]; |
||
50 | GLfloat fx = v[1]->win[0] - v[2]->win[0]; |
||
51 | GLfloat fy = v[1]->win[1] - v[2]->win[1]; |
||
52 | GLfloat cc = ex*fy - ey*fx; |
||
53 | |||
54 | if (IND & (SS_TWOSIDE_BIT | SS_UNFILLED_BIT)) |
||
55 | { |
||
56 | facing = (cc < 0.0) ^ ctx->Polygon._FrontBit; |
||
57 | if (ctx->Stencil.TestTwoSide) |
||
58 | ctx->_Facing = facing; /* for 2-sided stencil test */ |
||
59 | |||
60 | if (IND & SS_UNFILLED_BIT) |
||
61 | mode = facing ? ctx->Polygon.BackMode : ctx->Polygon.FrontMode; |
||
62 | |||
63 | if (facing == 1) { |
||
64 | if (IND & SS_TWOSIDE_BIT) { |
||
65 | if (IND & SS_RGBA_BIT) { |
||
66 | GLchan (*vbcolor)[4] = (GLchan (*)[4])VB->ColorPtr[1]->Ptr; |
||
67 | SS_COLOR(v[0]->color, vbcolor[e0]); |
||
68 | SS_COLOR(v[1]->color, vbcolor[e1]); |
||
69 | SS_COLOR(v[2]->color, vbcolor[e2]); |
||
70 | if (VB->SecondaryColorPtr[1]) { |
||
71 | GLchan (*vbspec)[4] = (GLchan (*)[4])VB->SecondaryColorPtr[1]->Ptr; |
||
72 | SS_SPEC(v[0]->specular, vbspec[e0]); |
||
73 | SS_SPEC(v[1]->specular, vbspec[e1]); |
||
74 | SS_SPEC(v[2]->specular, vbspec[e2]); |
||
75 | } |
||
76 | } else { |
||
77 | GLuint *vbindex = VB->IndexPtr[1]->data; |
||
78 | SS_IND(v[0]->index, vbindex[e0]); |
||
79 | SS_IND(v[1]->index, vbindex[e1]); |
||
80 | SS_IND(v[2]->index, vbindex[e2]); |
||
81 | } |
||
82 | } |
||
83 | } |
||
84 | } |
||
85 | |||
86 | if (IND & SS_OFFSET_BIT) |
||
87 | { |
||
88 | offset = ctx->Polygon.OffsetUnits; |
||
89 | z[0] = v[0]->win[2]; |
||
90 | z[1] = v[1]->win[2]; |
||
91 | z[2] = v[2]->win[2]; |
||
92 | if (cc * cc > 1e-16) { |
||
93 | GLfloat ez = z[0] - z[2]; |
||
94 | GLfloat fz = z[1] - z[2]; |
||
95 | GLfloat a = ey*fz - ez*fy; |
||
96 | GLfloat b = ez*fx - ex*fz; |
||
97 | GLfloat ic = 1.0F / cc; |
||
98 | GLfloat ac = a * ic; |
||
99 | GLfloat bc = b * ic; |
||
100 | if (ac < 0.0F) ac = -ac; |
||
101 | if (bc < 0.0F) bc = -bc; |
||
102 | offset += MAX2(ac, bc) * ctx->Polygon.OffsetFactor; |
||
103 | } |
||
104 | offset *= ctx->MRD; |
||
105 | /*printf("offset %g\n", offset);*/ |
||
106 | } |
||
107 | } |
||
108 | |||
109 | if (mode == GL_POINT) { |
||
110 | if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetPoint) { |
||
111 | v[0]->win[2] += offset; |
||
112 | v[1]->win[2] += offset; |
||
113 | v[2]->win[2] += offset; |
||
114 | } |
||
115 | _swsetup_render_point_tri( ctx, e0, e1, e2, facing ); |
||
116 | } else if (mode == GL_LINE) { |
||
117 | if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetLine) { |
||
118 | v[0]->win[2] += offset; |
||
119 | v[1]->win[2] += offset; |
||
120 | v[2]->win[2] += offset; |
||
121 | } |
||
122 | _swsetup_render_line_tri( ctx, e0, e1, e2, facing ); |
||
123 | } else { |
||
124 | if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetFill) { |
||
125 | v[0]->win[2] += offset; |
||
126 | v[1]->win[2] += offset; |
||
127 | v[2]->win[2] += offset; |
||
128 | } |
||
129 | _swrast_Triangle( ctx, v[0], v[1], v[2] ); |
||
130 | } |
||
131 | |||
132 | if (IND & SS_OFFSET_BIT) { |
||
133 | v[0]->win[2] = z[0]; |
||
134 | v[1]->win[2] = z[1]; |
||
135 | v[2]->win[2] = z[2]; |
||
136 | } |
||
137 | |||
138 | if (IND & SS_TWOSIDE_BIT) { |
||
139 | if (facing == 1) { |
||
140 | if (IND & SS_RGBA_BIT) { |
||
141 | GLchan (*vbcolor)[4] = (GLchan (*)[4])VB->ColorPtr[0]->Ptr; |
||
142 | SS_COLOR(v[0]->color, vbcolor[e0]); |
||
143 | SS_COLOR(v[1]->color, vbcolor[e1]); |
||
144 | SS_COLOR(v[2]->color, vbcolor[e2]); |
||
145 | if (VB->SecondaryColorPtr[0]) { |
||
146 | GLchan (*vbspec)[4] = (GLchan (*)[4])VB->SecondaryColorPtr[0]->Ptr; |
||
147 | SS_SPEC(v[0]->specular, vbspec[e0]); |
||
148 | SS_SPEC(v[1]->specular, vbspec[e1]); |
||
149 | SS_SPEC(v[2]->specular, vbspec[e2]); |
||
150 | } |
||
151 | } else { |
||
152 | GLuint *vbindex = VB->IndexPtr[0]->data; |
||
153 | SS_IND(v[0]->index, vbindex[e0]); |
||
154 | SS_IND(v[1]->index, vbindex[e1]); |
||
155 | SS_IND(v[2]->index, vbindex[e2]); |
||
156 | } |
||
157 | } |
||
158 | } |
||
159 | } |
||
160 | |||
161 | |||
162 | |||
163 | /* Need to fixup edgeflags when decomposing to triangles: |
||
164 | */ |
||
165 | static void TAG(quadfunc)( GLcontext *ctx, GLuint v0, |
||
166 | GLuint v1, GLuint v2, GLuint v3 ) |
||
167 | { |
||
168 | if (IND & SS_UNFILLED_BIT) { |
||
169 | struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; |
||
170 | GLubyte ef1 = VB->EdgeFlag[v1]; |
||
171 | GLubyte ef3 = VB->EdgeFlag[v3]; |
||
172 | VB->EdgeFlag[v1] = 0; |
||
173 | TAG(triangle)( ctx, v0, v1, v3 ); |
||
174 | VB->EdgeFlag[v1] = ef1; |
||
175 | VB->EdgeFlag[v3] = 0; |
||
176 | TAG(triangle)( ctx, v1, v2, v3 ); |
||
177 | VB->EdgeFlag[v3] = ef3; |
||
178 | } else { |
||
179 | TAG(triangle)( ctx, v0, v1, v3 ); |
||
180 | TAG(triangle)( ctx, v1, v2, v3 ); |
||
181 | } |
||
182 | } |
||
183 | |||
184 | |||
185 | |||
186 | |||
187 | static void TAG(init)( void ) |
||
188 | { |
||
189 | tri_tab[IND] = TAG(triangle); |
||
190 | quad_tab[IND] = TAG(quadfunc); |
||
191 | } |
||
192 | |||
193 | |||
194 | #undef IND |
||
195 | #undef TAG |