Subversion Repositories shark

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
57 pj 1 
/* $Id: s_feedback.c,v 1.1 2003-02-28 11:49:41 pj Exp $ */
2 
 
3 
/*
4 
 * Mesa 3-D graphics library
5 
 * Version:  3.5
6 
 *
7 
 * Copyright (C) 1999-2001  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 
 
27 
#include "glheader.h"
28 
#include "colormac.h"
29 
#include "context.h"
30 
#include "enums.h"
31 
#include "feedback.h"
32 
#include "macros.h"
33 
#include "mmath.h"
34 
 
35 
#include "s_context.h"
36 
#include "s_feedback.h"
37 
#include "s_triangle.h"
38 
 
39 
 
40 
#define FB_3D           0x01
41 
#define FB_4D           0x02
42 
#define FB_INDEX        0x04
43 
#define FB_COLOR        0x08
44 
#define FB_TEXTURE      0X10
45 
 
46 
 
47 
 
48 
 
49 
static void feedback_vertex( GLcontext *ctx,
50 
                             const SWvertex *v, const SWvertex *pv )
51 
{
52 
   const GLuint texUnit = 0;  /* See section 5.3 of 1.2.1 spec */
53 
   GLfloat win[4];
54 
   GLfloat color[4];
55 
   GLfloat tc[4];
56 
   GLuint index;
57 
 
58 
   win[0] = v->win[0];
59 
   win[1] = v->win[1];
60 
   win[2] = v->win[2] / ctx->DepthMaxF;
61 
   win[3] = 1.0F / v->win[3];
62 
 
63 
   color[0] = CHAN_TO_FLOAT(pv->color[0]);
64 
   color[1] = CHAN_TO_FLOAT(pv->color[1]);
65 
   color[2] = CHAN_TO_FLOAT(pv->color[2]);
66 
   color[3] = CHAN_TO_FLOAT(pv->color[3]);
67 
 
68 
   if (v->texcoord[texUnit][3] != 1.0 &&
69 
       v->texcoord[texUnit][3] != 0.0) {
70 
      GLfloat invq = 1.0F / v->texcoord[texUnit][3];
71 
      tc[0] = v->texcoord[texUnit][0] * invq;
72 
      tc[1] = v->texcoord[texUnit][1] * invq;
73 
      tc[2] = v->texcoord[texUnit][2] * invq;
74 
      tc[3] = v->texcoord[texUnit][3];
75 
   }
76 
   else {
77 
      COPY_4V(tc, v->texcoord[texUnit]);
78 
   }
79 
 
80 
   index = v->index;
81 
 
82 
   _mesa_feedback_vertex( ctx, win, color, index, tc );
83 
}
84 
 
85 
 
86 
/*
87 
 * Put triangle in feedback buffer.
88 
 */
89 
void _mesa_feedback_triangle( GLcontext *ctx,
90 
                           const SWvertex *v0,
91 
                           const SWvertex *v1,
92 
                           const SWvertex *v2)
93 
{
94 
   if (_mesa_cull_triangle( ctx, v0, v1, v2 )) {
95 
      FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN );
96 
      FEEDBACK_TOKEN( ctx, (GLfloat) 3 );        /* three vertices */
97 
 
98 
      if (ctx->Light.ShadeModel == GL_SMOOTH) {
99 
         feedback_vertex( ctx, v0, v0 );
100 
         feedback_vertex( ctx, v1, v1 );
101 
         feedback_vertex( ctx, v2, v2 );
102 
      } else {
103 
         feedback_vertex( ctx, v0, v2 );
104 
         feedback_vertex( ctx, v1, v2 );
105 
         feedback_vertex( ctx, v2, v2 );
106 
      }
107 
   }
108 
}
109 
 
110 
 
111 
void _mesa_feedback_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 )
112 
{
113 
   GLenum token = GL_LINE_TOKEN;
114 
   SWcontext *swrast = SWRAST_CONTEXT(ctx);
115 
 
116 
   if (swrast->StippleCounter==0)
117 
      token = GL_LINE_RESET_TOKEN;
118 
 
119 
   FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) token );
120 
 
121 
   if (ctx->Light.ShadeModel == GL_SMOOTH) {
122 
      feedback_vertex( ctx, v0, v0 );
123 
      feedback_vertex( ctx, v1, v1 );
124 
   } else {
125 
      feedback_vertex( ctx, v0, v1 );
126 
      feedback_vertex( ctx, v1, v1 );
127 
   }
128 
 
129 
   swrast->StippleCounter++;
130 
}
131 
 
132 
 
133 
void _mesa_feedback_point( GLcontext *ctx, const SWvertex *v )
134 
{
135 
   FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_POINT_TOKEN );
136 
   feedback_vertex( ctx, v, v );
137 
}
138 
 
139 
 
140 
void _mesa_select_triangle( GLcontext *ctx,
141 
                         const SWvertex *v0,
142 
                         const SWvertex *v1,
143 
                         const SWvertex *v2)
144 
{
145 
   if (_mesa_cull_triangle( ctx, v0, v1, v2 )) {
146 
      const GLfloat zs = 1.0F / ctx->DepthMaxF;
147 
 
148 
      _mesa_update_hitflag( ctx, v0->win[2] * zs );
149 
      _mesa_update_hitflag( ctx, v1->win[2] * zs );
150 
      _mesa_update_hitflag( ctx, v2->win[2] * zs );
151 
   }
152 
}
153 
 
154 
 
155 
void _mesa_select_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 )
156 
{
157 
   const GLfloat zs = 1.0F / ctx->DepthMaxF;
158 
   _mesa_update_hitflag( ctx, v0->win[2] * zs );
159 
   _mesa_update_hitflag( ctx, v1->win[2] * zs );
160 
}
161 
 
162 
 
163 
void _mesa_select_point( GLcontext *ctx, const SWvertex *v )
164 
{
165 
   const GLfloat zs = 1.0F / ctx->DepthMaxF;
166 
   _mesa_update_hitflag( ctx, v->win[2] * zs );
167 
}