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 "colormac.h"
  30 #include "macros.h"
  31 #include "mtypes.h"
  32
  33 #include "tnl/t_context.h"
  34
  35 #include "ss_triangle.h"
  36 #include "ss_context.h"
  37
  38 #define SS_RGBA_BIT         0x1
  39 #define SS_OFFSET_BIT       0x2
  40 #define SS_TWOSIDE_BIT      0x4
  41 #define SS_UNFILLED_BIT     0x8
  42 #define SS_MAX_TRIFUNC      0x10
  43
  44 static triangle_func tri_tab[SS_MAX_TRIFUNC];
  45 static quad_func     quad_tab[SS_MAX_TRIFUNC];
  46
  47
  48 static void _swsetup_render_line_tri( GLcontext *ctx,
  49                                       GLuint e0, GLuint e1, GLuint e2 )
  50 {
  51    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
  52    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
  53    GLubyte *ef = VB->EdgeFlag;
  54    SWvertex *verts = swsetup->verts;
  55    SWvertex *v0 = &verts[e0];
  56    SWvertex *v1 = &verts[e1];
  57    SWvertex *v2 = &verts[e2];
  58    GLchan c[2][4];
  59    GLchan s[2][4];
  60    GLuint i[2];
  61
  62    if (ctx->_TriangleCaps & DD_FLATSHADE) {
  63       COPY_CHAN4(c[0], v0->color);
  64       COPY_CHAN4(c[1], v1->color);
  65       COPY_CHAN4(s[0], v0->specular);
  66       COPY_CHAN4(s[1], v1->specular);
  67       i[0] = v0->index;
  68       i[1] = v1->index;
  69
  70       COPY_CHAN4(v0->color, v2->color);
  71       COPY_CHAN4(v1->color, v2->color);
  72       COPY_CHAN4(v0->specular, v2->specular);
  73       COPY_CHAN4(v1->specular, v2->specular);
  74       v0->index = v2->index;
  75       v1->index = v2->index;
  76    }
  77
  78    if (swsetup->render_prim == GL_POLYGON) {
  79       if (ef[e2]) _swrast_Line( ctx, v2, v0 );
  80       if (ef[e0]) _swrast_Line( ctx, v0, v1 );
  81       if (ef[e1]) _swrast_Line( ctx, v1, v2 );
  82    } else {
  83       if (ef[e0]) _swrast_Line( ctx, v0, v1 );
  84       if (ef[e1]) _swrast_Line( ctx, v1, v2 );
  85       if (ef[e2]) _swrast_Line( ctx, v2, v0 );
  86    }
  87
  88    if (ctx->_TriangleCaps & DD_FLATSHADE) {
  89       COPY_CHAN4(v0->color, c[0]);
  90       COPY_CHAN4(v1->color, c[1]);
  91       COPY_CHAN4(v0->specular, s[0]);
  92       COPY_CHAN4(v1->specular, s[1]);
  93       v0->index = i[0];
  94       v1->index = i[1];
  95    }
  96 }
  97
  98 static void _swsetup_render_point_tri( GLcontext *ctx,
  99                                        GLuint e0, GLuint e1, GLuint e2 )
 100 {
 101    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 102    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
 103    GLubyte *ef = VB->EdgeFlag;
 104    SWvertex *verts = swsetup->verts;
 105    SWvertex *v0 = &verts[e0];
 106    SWvertex *v1 = &verts[e1];
 107    SWvertex *v2 = &verts[e2];
 108    GLchan c[2][4];
 109    GLchan s[2][4];
 110    GLuint i[2];
 111
 112    if (ctx->_TriangleCaps & DD_FLATSHADE) {
 113       COPY_CHAN4(c[0], v0->color);
 114       COPY_CHAN4(c[1], v1->color);
 115       COPY_CHAN4(s[0], v0->specular);
 116       COPY_CHAN4(s[1], v1->specular);
 117       i[0] = v0->index;
 118       i[1] = v1->index;
 119
 120       COPY_CHAN4(v0->color, v2->color);
 121       COPY_CHAN4(v1->color, v2->color);
 122       COPY_CHAN4(v0->specular, v2->specular);
 123       COPY_CHAN4(v1->specular, v2->specular);
 124       v0->index = v2->index;
 125       v1->index = v2->index;
 126    }
 127
 128    if (ef[e0]) _swrast_Point( ctx, v0 );
 129    if (ef[e1]) _swrast_Point( ctx, v1 );
 130    if (ef[e2]) _swrast_Point( ctx, v2 );
 131
 132    if (ctx->_TriangleCaps & DD_FLATSHADE) {
 133       COPY_CHAN4(v0->color, c[0]);
 134       COPY_CHAN4(v1->color, c[1]);
 135       COPY_CHAN4(v0->specular, s[0]);
 136       COPY_CHAN4(v1->specular, s[1]);
 137       v0->index = i[0];
 138       v1->index = i[1];
 139    }
 140 }
 141
 142 #define SS_COLOR(a,b) COPY_4UBV(a,b)
 143 #define SS_SPEC(a,b) COPY_4UBV(a,b)
 144 #define SS_IND(a,b) (a = b)
 145
 146 #define IND (0)
 147 #define TAG(x) x
 148 #include "ss_tritmp.h"
 149
 150 #define IND (SS_OFFSET_BIT)
 151 #define TAG(x) x##_offset
 152 #include "ss_tritmp.h"
 153
 154 #define IND (SS_TWOSIDE_BIT)
 155 #define TAG(x) x##_twoside
 156 #include "ss_tritmp.h"
 157
 158 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT)
 159 #define TAG(x) x##_offset_twoside
 160 #include "ss_tritmp.h"
 161
 162 #define IND (SS_UNFILLED_BIT)
 163 #define TAG(x) x##_unfilled
 164 #include "ss_tritmp.h"
 165
 166 #define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT)
 167 #define TAG(x) x##_offset_unfilled
 168 #include "ss_tritmp.h"
 169
 170 #define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
 171 #define TAG(x) x##_twoside_unfilled
 172 #include "ss_tritmp.h"
 173
 174 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
 175 #define TAG(x) x##_offset_twoside_unfilled
 176 #include "ss_tritmp.h"
 177
 178 #define IND (0|SS_RGBA_BIT)
 179 #define TAG(x) x##_rgba
 180 #include "ss_tritmp.h"
 181
 182 #define IND (SS_OFFSET_BIT|SS_RGBA_BIT)
 183 #define TAG(x) x##_offset_rgba
 184 #include "ss_tritmp.h"
 185
 186 #define IND (SS_TWOSIDE_BIT|SS_RGBA_BIT)
 187 #define TAG(x) x##_twoside_rgba
 188 #include "ss_tritmp.h"
 189
 190 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_RGBA_BIT)
 191 #define TAG(x) x##_offset_twoside_rgba
 192 #include "ss_tritmp.h"
 193
 194 #define IND (SS_UNFILLED_BIT|SS_RGBA_BIT)
 195 #define TAG(x) x##_unfilled_rgba
 196 #include "ss_tritmp.h"
 197
 198 #define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
 199 #define TAG(x) x##_offset_unfilled_rgba
 200 #include "ss_tritmp.h"
 201
 202 #define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
 203 #define TAG(x) x##_twoside_unfilled_rgba
 204 #include "ss_tritmp.h"
 205
 206 #define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
 207 #define TAG(x) x##_offset_twoside_unfilled_rgba
 208 #include "ss_tritmp.h"
 209
 210
 211 void _swsetup_trifuncs_init( GLcontext *ctx )
 212 {
 213    (void) ctx;
 214
 215    init();
 216    init_offset();
 217    init_twoside();
 218    init_offset_twoside();
 219    init_unfilled();
 220    init_offset_unfilled();
 221    init_twoside_unfilled();
 222    init_offset_twoside_unfilled();
 223
 224    init_rgba();
 225    init_offset_rgba();
 226    init_twoside_rgba();
 227    init_offset_twoside_rgba();
 228    init_unfilled_rgba();
 229    init_offset_unfilled_rgba();
 230    init_twoside_unfilled_rgba();
 231    init_offset_twoside_unfilled_rgba();
 232 }
 233
 234
 235 static void swsetup_points( GLcontext *ctx, GLuint first, GLuint last )
 236 {
 237    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
 238    SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts;
 239    GLuint i;
 240
 241    if (VB->Elts) {
 242       for (i = first; i < last; i++)
 243          if (VB->ClipMask[VB->Elts[i]] == 0)
 244             _swrast_Point( ctx, &verts[VB->Elts[i]] );
 245    }
 246    else {
 247       for (i = first; i < last; i++)
 248          if (VB->ClipMask[i] == 0)
 249             _swrast_Point( ctx, &verts[i] );
 250    }
 251 }
 252
 253 static void swsetup_line( GLcontext *ctx, GLuint v0, GLuint v1 )
 254 {
 255    SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts;
 256    _swrast_Line( ctx, &verts[v0], &verts[v1] );
 257 }
 258
 259
 260
 261 void _swsetup_choose_trifuncs( GLcontext *ctx )
 262 {
 263    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 264    GLuint ind = 0;
 265
 266    if (ctx->Polygon._OffsetAny)
 267       ind |= SS_OFFSET_BIT;
 268
 269    if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
 270       ind |= SS_TWOSIDE_BIT;
 271
 272    if (ctx->_TriangleCaps & DD_TRI_UNFILLED)
 273       ind |= SS_UNFILLED_BIT;
 274
 275    if (ctx->Visual.rgbMode)
 276       ind |= SS_RGBA_BIT;
 277
 278    swsetup->Triangle = tri_tab[ind];
 279    swsetup->Quad = quad_tab[ind];
 280    swsetup->Line = swsetup_line;
 281    swsetup->Points = swsetup_points;
 282 }
 283