reactos/lib/mesa32/src/tnl/t_vb_render.c

   1
   2 /*
   3  * Mesa 3-D graphics library
   4  * Version:  5.1
   5  *
   6  * Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Keith Whitwell <keith@tungstengraphics.com>
  27  */
  28
  29
  30 /*
  31  * Render whole vertex buffers, including projection of vertices from
  32  * clip space and clipping of primitives.
  33  *
  34  * This file makes calls to project vertices and to the point, line
  35  * and triangle rasterizers via the function pointers:
  36  *
  37  *    context->Driver.Render.*
  38  *
  39  */
  40
  41
  42 #include "glheader.h"
  43 #include "context.h"
  44 #include "enums.h"
  45 #include "macros.h"
  46 #include "imports.h"
  47 #include "mtypes.h"
  48 #include "nvfragprog.h"
  49 #include "math/m_matrix.h"
  50 #include "math/m_xform.h"
  51
  52 #include "t_pipeline.h"
  53
  54
  55
  56 /**********************************************************************/
  57 /*                        Clip single primitives                      */
  58 /**********************************************************************/
  59
  60
  61 #define W(i) coord[i][3]
  62 #define Z(i) coord[i][2]
  63 #define Y(i) coord[i][1]
  64 #define X(i) coord[i][0]
  65 #define SIZE 4
  66 #define TAG(x) x##_4
  67 #include "t_vb_cliptmp.h"
  68
  69
  70
  71 /**********************************************************************/
  72 /*              Clip and render whole begin/end objects               */
  73 /**********************************************************************/
  74
  75 #define NEED_EDGEFLAG_SETUP (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL)
  76 #define EDGEFLAG_GET(idx) VB->EdgeFlag[idx]
  77 #define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val
  78
  79
  80 #define CLIPMASK (CLIP_ALL_BITS|CLIP_CULL_BIT)
  81
  82
  83 /* Vertices, with the possibility of clipping.
  84  */
  85 #define RENDER_POINTS( start, count ) \
  86    tnl->Driver.Render.Points( ctx, start, count )
  87
  88 #define RENDER_LINE( v1, v2 )                   \
  89 do {                                            \
  90    GLubyte c1 = mask[v1], c2 = mask[v2];        \
  91    GLubyte ormask = c1|c2;                      \
  92    if (!ormask)                                 \
  93       LineFunc( ctx, v1, v2 );                  \
  94    else if (!(c1 & c2 & CLIPMASK))                      \
  95       clip_line_4( ctx, v1, v2, ormask );       \
  96 } while (0)
  97
  98 #define RENDER_TRI( v1, v2, v3 )                        \
  99 do {                                                    \
 100    GLubyte c1 = mask[v1], c2 = mask[v2], c3 = mask[v3]; \
 101    GLubyte ormask = c1|c2|c3;                           \
 102    if (!ormask)                                         \
 103       TriangleFunc( ctx, v1, v2, v3 );                  \
 104    else if (!(c1 & c2 & c3 & CLIPMASK))                         \
 105       clip_tri_4( ctx, v1, v2, v3, ormask );            \
 106 } while (0)
 107
 108 #define RENDER_QUAD( v1, v2, v3, v4 )                   \
 109 do {                                                    \
 110    GLubyte c1 = mask[v1], c2 = mask[v2];                \
 111    GLubyte c3 = mask[v3], c4 = mask[v4];                \
 112    GLubyte ormask = c1|c2|c3|c4;                        \
 113    if (!ormask)                                         \
 114       QuadFunc( ctx, v1, v2, v3, v4 );                  \
 115    else if (!(c1 & c2 & c3 & c4 & CLIPMASK))            \
 116       clip_quad_4( ctx, v1, v2, v3, v4, ormask );       \
 117 } while (0)
 118
 119
 120 #define LOCAL_VARS                                              \
 121    TNLcontext *tnl = TNL_CONTEXT(ctx);                          \
 122    struct vertex_buffer *VB = &tnl->vb;                         \
 123    const GLuint * const elt = VB->Elts;                         \
 124    const GLubyte *mask = VB->ClipMask;                          \
 125    const GLuint sz = VB->ClipPtr->size;                         \
 126    const tnl_line_func LineFunc = tnl->Driver.Render.Line;              \
 127    const tnl_triangle_func TriangleFunc = tnl->Driver.Render.Triangle;  \
 128    const tnl_quad_func QuadFunc = tnl->Driver.Render.Quad;              \
 129    const GLboolean stipple = ctx->Line.StippleFlag;             \
 130    (void) (LineFunc && TriangleFunc && QuadFunc);               \
 131    (void) elt; (void) mask; (void) sz; (void) stipple;
 132
 133 #define TAG(x) clip_##x##_verts
 134 #define INIT(x) tnl->Driver.Render.PrimitiveNotify( ctx, x )
 135 #define RESET_STIPPLE if (stipple) tnl->Driver.Render.ResetLineStipple( ctx )
 136 #define RESET_OCCLUSION ctx->OcclusionResult = GL_TRUE
 137 #define PRESERVE_VB_DEFS
 138 #include "t_vb_rendertmp.h"
 139
 140
 141
 142 /* Elts, with the possibility of clipping.
 143  */
 144 #undef ELT
 145 #undef TAG
 146 #define ELT(x) elt[x]
 147 #define TAG(x) clip_##x##_elts
 148 #include "t_vb_rendertmp.h"
 149
 150 /* TODO: do this for all primitives, verts and elts:
 151  */
 152 static void clip_elt_triangles( GLcontext *ctx,
 153                                 GLuint start,
 154                                 GLuint count,
 155                                 GLuint flags )
 156 {
 157    TNLcontext *tnl = TNL_CONTEXT(ctx);
 158    tnl_render_func render_tris = tnl->Driver.Render.PrimTabElts[GL_TRIANGLES];
 159    struct vertex_buffer *VB = &tnl->vb;
 160    const GLuint * const elt = VB->Elts;
 161    GLubyte *mask = VB->ClipMask;
 162    GLuint last = count-2;
 163    GLuint j;
 164    (void) flags;
 165
 166    tnl->Driver.Render.PrimitiveNotify( ctx, GL_TRIANGLES );
 167
 168    for (j=start; j < last; j+=3 ) {
 169       GLubyte c1 = mask[elt[j]];
 170       GLubyte c2 = mask[elt[j+1]];
 171       GLubyte c3 = mask[elt[j+2]];
 172       GLubyte ormask = c1|c2|c3;
 173       if (ormask) {
 174          if (start < j)
 175             render_tris( ctx, start, j, 0 );
 176          if (!(c1&c2&c3&CLIPMASK))
 177             clip_tri_4( ctx, elt[j], elt[j+1], elt[j+2], ormask );
 178          start = j+3;
 179       }
 180    }
 181
 182    if (start < j)
 183       render_tris( ctx, start, j, 0 );
 184 }
 185
 186 /**********************************************************************/
 187 /*                  Render whole begin/end objects                    */
 188 /**********************************************************************/
 189
 190 #define NEED_EDGEFLAG_SETUP (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL)
 191 #define EDGEFLAG_GET(idx) VB->EdgeFlag[idx]
 192 #define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val
 193
 194
 195 /* Vertices, no clipping.
 196  */
 197 #define RENDER_POINTS( start, count ) \
 198    tnl->Driver.Render.Points( ctx, start, count )
 199
 200 #define RENDER_LINE( v1, v2 ) \
 201    LineFunc( ctx, v1, v2 )
 202
 203 #define RENDER_TRI( v1, v2, v3 ) \
 204    TriangleFunc( ctx, v1, v2, v3 )
 205
 206 #define RENDER_QUAD( v1, v2, v3, v4 ) \
 207    QuadFunc( ctx, v1, v2, v3, v4 )
 208
 209 #define TAG(x) _tnl_##x##_verts
 210
 211 #define LOCAL_VARS                                              \
 212    TNLcontext *tnl = TNL_CONTEXT(ctx);                          \
 213    struct vertex_buffer *VB = &tnl->vb;                         \
 214    const GLuint * const elt = VB->Elts;                         \
 215    const tnl_line_func LineFunc = tnl->Driver.Render.Line;              \
 216    const tnl_triangle_func TriangleFunc = tnl->Driver.Render.Triangle;  \
 217    const tnl_quad_func QuadFunc = tnl->Driver.Render.Quad;              \
 218    const GLboolean stipple = ctx->Line.StippleFlag;             \
 219    (void) (LineFunc && TriangleFunc && QuadFunc);               \
 220    (void) elt; (void) stipple
 221
 222 #define RESET_STIPPLE if (stipple) tnl->Driver.Render.ResetLineStipple( ctx )
 223 #define RESET_OCCLUSION ctx->OcclusionResult = GL_TRUE
 224 #define INIT(x) tnl->Driver.Render.PrimitiveNotify( ctx, x )
 225 #define RENDER_TAB_QUALIFIER
 226 #define PRESERVE_VB_DEFS
 227 #include "t_vb_rendertmp.h"
 228
 229
 230 /* Elts, no clipping.
 231  */
 232 #undef ELT
 233 #define TAG(x) _tnl_##x##_elts
 234 #define ELT(x) elt[x]
 235 #include "t_vb_rendertmp.h"
 236
 237
 238 /**********************************************************************/
 239 /*              Helper functions for drivers                  */
 240 /**********************************************************************/
 241
 242 void _tnl_RenderClippedPolygon( GLcontext *ctx, const GLuint *elts, GLuint n )
 243 {
 244    TNLcontext *tnl = TNL_CONTEXT(ctx);
 245    struct vertex_buffer *VB = &tnl->vb;
 246    GLuint *tmp = VB->Elts;
 247
 248    VB->Elts = (GLuint *)elts;
 249    tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END );
 250    VB->Elts = tmp;
 251 }
 252
 253 void _tnl_RenderClippedLine( GLcontext *ctx, GLuint ii, GLuint jj )
 254 {
 255    TNLcontext *tnl = TNL_CONTEXT(ctx);
 256    tnl->Driver.Render.Line( ctx, ii, jj );
 257 }
 258
 259
 260
 261 /**********************************************************************/
 262 /*              Clip and render whole vertex buffers                  */
 263 /**********************************************************************/
 264
 265
 266 static GLboolean run_render( GLcontext *ctx,
 267                              struct tnl_pipeline_stage *stage )
 268 {
 269    TNLcontext *tnl = TNL_CONTEXT(ctx);
 270    struct vertex_buffer *VB = &tnl->vb;
 271    tnl_render_func *tab;
 272    GLint pass = 0;
 273
 274    /* Allow the drivers to lock before projected verts are built so
 275     * that window coordinates are guarenteed not to change before
 276     * rendering.
 277     */
 278    ASSERT(tnl->Driver.Render.Start);
 279
 280    tnl->Driver.Render.Start( ctx );
 281
 282    ASSERT(tnl->Driver.Render.BuildVertices);
 283    ASSERT(tnl->Driver.Render.PrimitiveNotify);
 284    ASSERT(tnl->Driver.Render.Points);
 285    ASSERT(tnl->Driver.Render.Line);
 286    ASSERT(tnl->Driver.Render.Triangle);
 287    ASSERT(tnl->Driver.Render.Quad);
 288    ASSERT(tnl->Driver.Render.ResetLineStipple);
 289    ASSERT(tnl->Driver.Render.Interp);
 290    ASSERT(tnl->Driver.Render.CopyPV);
 291    ASSERT(tnl->Driver.Render.ClippedLine);
 292    ASSERT(tnl->Driver.Render.ClippedPolygon);
 293    ASSERT(tnl->Driver.Render.Finish);
 294
 295    tnl->Driver.Render.BuildVertices( ctx, 0, VB->Count, ~0 );
 296
 297    if (VB->ClipOrMask) {
 298       tab = VB->Elts ? clip_render_tab_elts : clip_render_tab_verts;
 299       clip_render_tab_elts[GL_TRIANGLES] = clip_elt_triangles;
 300    }
 301    else {
 302       tab = (VB->Elts ?
 303              tnl->Driver.Render.PrimTabElts :
 304              tnl->Driver.Render.PrimTabVerts);
 305    }
 306
 307    do
 308    {
 309       GLuint i;
 310
 311       for (i = 0 ; i < VB->PrimitiveCount ; i++)
 312       {
 313          GLuint prim = VB->Primitive[i].mode;
 314          GLuint start = VB->Primitive[i].start;
 315          GLuint length = VB->Primitive[i].count;
 316
 317          assert((prim & PRIM_MODE_MASK) < GL_POLYGON+1);
 318
 319          if (MESA_VERBOSE & VERBOSE_PRIMS)
 320             _mesa_debug(NULL, "MESA prim %s %d..%d\n",
 321                         _mesa_lookup_enum_by_nr(prim & PRIM_MODE_MASK),
 322                         start, start+length);
 323
 324          if (length)
 325             tab[prim & PRIM_MODE_MASK]( ctx, start, start + length, prim );
 326       }
 327    } while (tnl->Driver.Render.Multipass &&
 328             tnl->Driver.Render.Multipass( ctx, ++pass ));
 329
 330    tnl->Driver.Render.Finish( ctx );
 331
 332    return GL_FALSE;             /* finished the pipe */
 333 }
 334
 335
 336 /**********************************************************************/
 337 /*                          Render pipeline stage                     */
 338 /**********************************************************************/
 339
 340
 341
 342
 343
 344 const struct tnl_pipeline_stage _tnl_render_stage =
 345 {
 346    "render",                    /* name */
 347    NULL,                        /* private data */
 348    NULL,                        /* creator */
 349    NULL,                        /* destructor */
 350    NULL,                        /* validate */
 351    run_render                   /* run */
 352 };