ss_triangle.c revision fcd7c37fd3d0f61cf6ac81170bc0b3fca64ad9bb
1/* 2 * Mesa 3-D graphics library 3 * Version: 7.1 4 * 5 * Copyright (C) 1999-2007 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 <keith@tungstengraphics.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 44static tnl_triangle_func tri_tab[SS_MAX_TRIFUNC]; 45static tnl_quad_func quad_tab[SS_MAX_TRIFUNC]; 46 47 48static void _swsetup_render_line_tri( GLcontext *ctx, 49 GLuint e0, GLuint e1, GLuint e2, 50 GLuint facing ) 51{ 52 SScontext *swsetup = SWSETUP_CONTEXT(ctx); 53 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; 54 GLubyte *ef = VB->EdgeFlag; 55 SWvertex *verts = swsetup->verts; 56 SWvertex *v0 = &verts[e0]; 57 SWvertex *v1 = &verts[e1]; 58 SWvertex *v2 = &verts[e2]; 59 GLchan c[2][4]; 60 GLfloat s[2][4]; 61 GLfloat i[2]; 62 63 /* cull testing */ 64 if (ctx->Polygon.CullFlag) { 65 if (facing == 1 && ctx->Polygon.CullFaceMode != GL_FRONT) 66 return; 67 if (facing == 0 && ctx->Polygon.CullFaceMode != GL_BACK) 68 return; 69 } 70 71 _swrast_SetFacing(ctx, facing); 72 73 if (ctx->Light.ShadeModel == GL_FLAT) { 74 COPY_CHAN4(c[0], v0->color); 75 COPY_CHAN4(c[1], v1->color); 76 COPY_4V(s[0], v0->attrib[FRAG_ATTRIB_COL1]); 77 COPY_4V(s[1], v1->attrib[FRAG_ATTRIB_COL1]); 78 i[0] = v0->attrib[FRAG_ATTRIB_CI][0]; 79 i[1] = v1->attrib[FRAG_ATTRIB_CI][0]; 80 81 COPY_CHAN4(v0->color, v2->color); 82 COPY_CHAN4(v1->color, v2->color); 83 COPY_4V(v0->attrib[FRAG_ATTRIB_COL1], v2->attrib[FRAG_ATTRIB_COL1]); 84 COPY_4V(v1->attrib[FRAG_ATTRIB_COL1], v2->attrib[FRAG_ATTRIB_COL1]); 85 v0->attrib[FRAG_ATTRIB_CI][0] = v2->attrib[FRAG_ATTRIB_CI][0]; 86 v1->attrib[FRAG_ATTRIB_CI][0] = v2->attrib[FRAG_ATTRIB_CI][0]; 87 } 88 89 if (swsetup->render_prim == GL_POLYGON) { 90 if (ef[e2]) _swrast_Line( ctx, v2, v0 ); 91 if (ef[e0]) _swrast_Line( ctx, v0, v1 ); 92 if (ef[e1]) _swrast_Line( ctx, v1, v2 ); 93 } else { 94 if (ef[e0]) _swrast_Line( ctx, v0, v1 ); 95 if (ef[e1]) _swrast_Line( ctx, v1, v2 ); 96 if (ef[e2]) _swrast_Line( ctx, v2, v0 ); 97 } 98 99 if (ctx->Light.ShadeModel == GL_FLAT) { 100 COPY_CHAN4(v0->color, c[0]); 101 COPY_CHAN4(v1->color, c[1]); 102 COPY_4V(v0->attrib[FRAG_ATTRIB_COL1], s[0]); 103 COPY_4V(v1->attrib[FRAG_ATTRIB_COL1], s[1]); 104 v0->attrib[FRAG_ATTRIB_CI][0] = i[0]; 105 v1->attrib[FRAG_ATTRIB_CI][0] = i[1]; 106 } 107} 108 109static void _swsetup_render_point_tri( GLcontext *ctx, 110 GLuint e0, GLuint e1, GLuint e2, 111 GLuint facing ) 112{ 113 SScontext *swsetup = SWSETUP_CONTEXT(ctx); 114 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; 115 GLubyte *ef = VB->EdgeFlag; 116 SWvertex *verts = swsetup->verts; 117 SWvertex *v0 = &verts[e0]; 118 SWvertex *v1 = &verts[e1]; 119 SWvertex *v2 = &verts[e2]; 120 GLchan c[2][4]; 121 GLfloat s[2][4]; 122 GLfloat i[2]; 123 124 /* cull testing */ 125 if (ctx->Polygon.CullFlag) { 126 if (facing == 1 && ctx->Polygon.CullFaceMode != GL_FRONT) 127 return; 128 if (facing == 0 && ctx->Polygon.CullFaceMode != GL_BACK) 129 return; 130 } 131 132 _swrast_SetFacing(ctx, facing); 133 134 if (ctx->Light.ShadeModel == GL_FLAT) { 135 /* save colors/indexes for v0, v1 vertices */ 136 COPY_CHAN4(c[0], v0->color); 137 COPY_CHAN4(c[1], v1->color); 138 COPY_4V(s[0], v0->attrib[FRAG_ATTRIB_COL1]); 139 COPY_4V(s[1], v1->attrib[FRAG_ATTRIB_COL1]); 140 i[0] = v0->attrib[FRAG_ATTRIB_CI][0]; 141 i[1] = v1->attrib[FRAG_ATTRIB_CI][0]; 142 143 /* 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]); 148 v0->attrib[FRAG_ATTRIB_CI][0] = v2->attrib[FRAG_ATTRIB_CI][0]; 149 v1->attrib[FRAG_ATTRIB_CI][0] = v2->attrib[FRAG_ATTRIB_CI][0]; 150 } 151 152 if (ef[e0]) _swrast_Point( ctx, v0 ); 153 if (ef[e1]) _swrast_Point( ctx, v1 ); 154 if (ef[e2]) _swrast_Point( ctx, v2 ); 155 156 if (ctx->Light.ShadeModel == GL_FLAT) { 157 /* restore v0, v1 colores/indexes */ 158 COPY_CHAN4(v0->color, c[0]); 159 COPY_CHAN4(v1->color, c[1]); 160 COPY_4V(v0->attrib[FRAG_ATTRIB_COL1], s[0]); 161 COPY_4V(v1->attrib[FRAG_ATTRIB_COL1], s[1]); 162 v0->attrib[FRAG_ATTRIB_CI][0] = i[0]; 163 v1->attrib[FRAG_ATTRIB_CI][0] = i[1]; 164 } 165 _swrast_flush(ctx); 166} 167 168#define SS_COLOR(a,b) UNCLAMPED_FLOAT_TO_RGBA_CHAN(a,b) 169#define SS_SPEC(a,b) UNCLAMPED_FLOAT_TO_RGB_CHAN(a,b) 170#define SS_IND(a,b) (a = b) 171 172#define IND (0) 173#define TAG(x) x 174#include "ss_tritmp.h" 175 176#define IND (SS_OFFSET_BIT) 177#define TAG(x) x##_offset 178#include "ss_tritmp.h" 179 180#define IND (SS_TWOSIDE_BIT) 181#define TAG(x) x##_twoside 182#include "ss_tritmp.h" 183 184#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT) 185#define TAG(x) x##_offset_twoside 186#include "ss_tritmp.h" 187 188#define IND (SS_UNFILLED_BIT) 189#define TAG(x) x##_unfilled 190#include "ss_tritmp.h" 191 192#define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT) 193#define TAG(x) x##_offset_unfilled 194#include "ss_tritmp.h" 195 196#define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT) 197#define TAG(x) x##_twoside_unfilled 198#include "ss_tritmp.h" 199 200#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT) 201#define TAG(x) x##_offset_twoside_unfilled 202#include "ss_tritmp.h" 203 204#define IND (0|SS_RGBA_BIT) 205#define TAG(x) x##_rgba 206#include "ss_tritmp.h" 207 208#define IND (SS_OFFSET_BIT|SS_RGBA_BIT) 209#define TAG(x) x##_offset_rgba 210#include "ss_tritmp.h" 211 212#define IND (SS_TWOSIDE_BIT|SS_RGBA_BIT) 213#define TAG(x) x##_twoside_rgba 214#include "ss_tritmp.h" 215 216#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_RGBA_BIT) 217#define TAG(x) x##_offset_twoside_rgba 218#include "ss_tritmp.h" 219 220#define IND (SS_UNFILLED_BIT|SS_RGBA_BIT) 221#define TAG(x) x##_unfilled_rgba 222#include "ss_tritmp.h" 223 224#define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT) 225#define TAG(x) x##_offset_unfilled_rgba 226#include "ss_tritmp.h" 227 228#define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT) 229#define TAG(x) x##_twoside_unfilled_rgba 230#include "ss_tritmp.h" 231 232#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT) 233#define TAG(x) x##_offset_twoside_unfilled_rgba 234#include "ss_tritmp.h" 235 236 237void _swsetup_trifuncs_init( GLcontext *ctx ) 238{ 239 (void) ctx; 240 241 init(); 242 init_offset(); 243 init_twoside(); 244 init_offset_twoside(); 245 init_unfilled(); 246 init_offset_unfilled(); 247 init_twoside_unfilled(); 248 init_offset_twoside_unfilled(); 249 250 init_rgba(); 251 init_offset_rgba(); 252 init_twoside_rgba(); 253 init_offset_twoside_rgba(); 254 init_unfilled_rgba(); 255 init_offset_unfilled_rgba(); 256 init_twoside_unfilled_rgba(); 257 init_offset_twoside_unfilled_rgba(); 258} 259 260 261static void swsetup_points( GLcontext *ctx, GLuint first, GLuint last ) 262{ 263 struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; 264 SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts; 265 GLuint i; 266 267 if (VB->Elts) { 268 for (i = first; i < last; i++) 269 if (VB->ClipMask[VB->Elts[i]] == 0) 270 _swrast_Point( ctx, &verts[VB->Elts[i]] ); 271 } 272 else { 273 for (i = first; i < last; i++) 274 if (VB->ClipMask[i] == 0) 275 _swrast_Point( ctx, &verts[i] ); 276 } 277} 278 279static void swsetup_line( GLcontext *ctx, GLuint v0, GLuint v1 ) 280{ 281 SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts; 282 _swrast_Line( ctx, &verts[v0], &verts[v1] ); 283} 284 285 286 287void _swsetup_choose_trifuncs( GLcontext *ctx ) 288{ 289 TNLcontext *tnl = TNL_CONTEXT(ctx); 290 GLuint ind = 0; 291 292 if (ctx->Polygon.OffsetPoint || 293 ctx->Polygon.OffsetLine || 294 ctx->Polygon.OffsetFill) 295 ind |= SS_OFFSET_BIT; 296 297 /* Note: gl_FrontFacing lives in fragment input FOGC.Y at this time */ 298 if ((ctx->Light.Enabled && ctx->Light.Model.TwoSide) || 299 (ctx->VertexProgram._Enabled && ctx->VertexProgram.TwoSideEnabled) || 300 (ctx->FragmentProgram._Current && ctx->FragmentProgram._Current->Base.InputsRead & (1 << FRAG_ATTRIB_FOGC))) 301 ind |= SS_TWOSIDE_BIT; 302 303 /* We piggyback the two-sided stencil front/back determination on the 304 * unfilled triangle path. 305 */ 306 if (ctx->Polygon.FrontMode != GL_FILL || 307 ctx->Polygon.BackMode != GL_FILL || 308 (ctx->Stencil.Enabled && ctx->Stencil._TestTwoSide)) 309 ind |= SS_UNFILLED_BIT; 310 311 if (ctx->Visual.rgbMode) 312 ind |= SS_RGBA_BIT; 313 314 tnl->Driver.Render.Triangle = tri_tab[ind]; 315 tnl->Driver.Render.Quad = quad_tab[ind]; 316 tnl->Driver.Render.Line = swsetup_line; 317 tnl->Driver.Render.Points = swsetup_points; 318} 319