src/mesa/swrast_setup/ss_triangle.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  3.5
   4  *
   5  * Copyright (C) 1999  Brian Paul   All Rights Reserved.
   6  *
   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:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  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.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keithw@valinux.com>
  26  */
  27
  28 #include "glheader.h"
  29 #include "macros.h"
  30 #include "types.h"
  31
  32 #include "ss_triangle.h"
  33 #include "ss_context.h"
  34
  35 #define SS_FLAT_BIT         0x1
  36 #define SS_OFFSET_BIT       0x2
  37 #define SS_TWOSIDE_BIT      0x4
  38 #define SS_UNFILLED_BIT     0x10
  39 #define SS_MAX_TRIFUNC      0x20
  40
  41 static triangle_func tri_tab[SS_MAX_TRIFUNC];
  42 static line_func     line_tab[SS_MAX_TRIFUNC];
  43 static points_func   points_tab[SS_MAX_TRIFUNC];
  44 static quad_func     quad_tab[SS_MAX_TRIFUNC];
  45
  46
  47 #define SS_COLOR(a,b) COPY_4UBV(a,b)
  48 #define SS_SPEC(a,b) COPY_4UBV(a,b)
  49 #define SS_IND(a,b) (a = b)
  50
  51 #define IND (0)
  52 #define TAG(x) x
  53 #include "ss_tritmp.h"
  54
  55 #define IND (SS_FLAT_BIT)
  56 #define TAG(x) x##_flat
  57 #include "ss_tritmp.h"
  58
  59 #define IND (SS_OFFSET_BIT)
  60 #define TAG(x) x##_offset
  61 #include "ss_tritmp.h"
  62
  63 #define IND (SS_FLAT_BIT|SS_OFFSET_BIT)
  64 #define TAG(x) x##_flat_offset
  65 #include "ss_tritmp.h"
  66
  67 #define IND (SS_TWOSIDE_BIT)
  68 #define TAG(x) x##_twoside
  69 #include "ss_tritmp.h"
  70
  71 #define IND (SS_FLAT_BIT|SS_TWOSIDE_BIT)
  72 #define TAG(x) x##_flat_twoside
  73 #include "ss_tritmp.h"
  74
  75 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT)
  76 #define TAG(x) x##_offset_twoside
  77 #include "ss_tritmp.h"
  78
  79 #define IND (SS_FLAT_BIT|SS_OFFSET_BIT|SS_TWOSIDE_BIT)
  80 #define TAG(x) x##_flat_offset_twoside
  81 #include "ss_tritmp.h"
  82
  83 #define IND (SS_UNFILLED_BIT)
  84 #define TAG(x) x##_unfilled
  85 #include "ss_tritmp.h"
  86
  87 #define IND (SS_FLAT_BIT|SS_UNFILLED_BIT)
  88 #define TAG(x) x##_flat_unfilled
  89 #include "ss_tritmp.h"
  90
  91 #define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT)
  92 #define TAG(x) x##_offset_unfilled
  93 #include "ss_tritmp.h"
  94
  95 #define IND (SS_FLAT_BIT|SS_OFFSET_BIT|SS_UNFILLED_BIT)
  96 #define TAG(x) x##_flat_offset_unfilled
  97 #include "ss_tritmp.h"
  98
  99 #define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
 100 #define TAG(x) x##_twoside_unfilled
 101 #include "ss_tritmp.h"
 102
 103 #define IND (SS_FLAT_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
 104 #define TAG(x) x##_flat_twoside_unfilled
 105 #include "ss_tritmp.h"
 106
 107 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
 108 #define TAG(x) x##_offset_twoside_unfilled
 109 #include "ss_tritmp.h"
 110
 111 #define IND (SS_FLAT_BIT|SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
 112 #define TAG(x) x##_flat_offset_twoside_unfilled
 113 #include "ss_tritmp.h"
 114
 115
 116 void _swsetup_trifuncs_init( GLcontext *ctx )
 117 {
 118    (void) ctx;
 119
 120    init();
 121    init_flat();
 122    init_offset();
 123    init_flat_offset();
 124    init_twoside();
 125    init_flat_twoside();
 126    init_offset_twoside();
 127    init_flat_offset_twoside();
 128    init_unfilled();
 129    init_flat_unfilled();
 130    init_offset_unfilled();
 131    init_flat_offset_unfilled();
 132    init_twoside_unfilled();
 133    init_flat_twoside_unfilled();
 134    init_offset_twoside_unfilled();
 135    init_flat_offset_twoside_unfilled();
 136 }
 137
 138
 139 void _swsetup_choose_trifuncs( GLcontext *ctx )
 140 {
 141    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 142    GLuint ind = 0;
 143
 144    if (ctx->Light.ShadeModel == GL_FLAT)
 145       ind |= SS_FLAT_BIT;
 146
 147    if (ctx->Polygon._OffsetAny)
 148       ind |= SS_OFFSET_BIT;
 149
 150    if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
 151       ind |= SS_TWOSIDE_BIT;
 152
 153    if (ctx->Polygon._Unfilled)
 154       ind |= SS_UNFILLED_BIT;
 155
 156    swsetup->Triangle = tri_tab[ind];
 157    swsetup->Line = line_tab[ind];
 158    swsetup->Points = points_tab[ind];
 159    swsetup->Quad = quad_tab[ind];
 160 }
 161