src/mesa/tnl/t_array_api.c

   1 /* $Id: t_array_api.c,v 1.6 2001/02/15 01:33:52 keithw 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  * Authors:
  27  *    Keith Whitwell <keithw@valinux.com>
  28  */
  29
  30 #include "glheader.h"
  31 #include "api_validate.h"
  32 #include "context.h"
  33 #include "macros.h"
  34 #include "mmath.h"
  35 #include "mem.h"
  36 #include "state.h"
  37 #include "mtypes.h"
  38
  39 #include "array_cache/acache.h"
  40
  41 #include "t_array_api.h"
  42 #include "t_array_import.h"
  43 #include "t_imm_api.h"
  44 #include "t_imm_exec.h"
  45 #include "t_context.h"
  46 #include "t_pipeline.h"
  47
  48 static void fallback_drawarrays( GLcontext *ctx, GLenum mode, GLint start,
  49                                  GLsizei count )
  50 {
  51    /* Need to produce immediate structs, either for compiling or
  52     * because the array range is too large to process in a single
  53     * VB.  In GL_EXECUTE mode, this introduces two redundant
  54     * operations: producing the flag array and computing the orflag
  55     * of the flag array.
  56     */
  57 #if 1
  58    if (_tnl_hard_begin( ctx, mode )) {
  59       GLuint j;
  60       for (j = 0 ; j < count ; ) {
  61          struct immediate *IM = TNL_CURRENT_IM(ctx);
  62          GLuint nr = MIN2( IMM_MAXDATA - IM->Start, count - j );
  63          GLuint sf = IM->Flag[IM->Start];
  64
  65          _tnl_fill_immediate_drawarrays( ctx, IM, j, j+nr );
  66
  67          if (j == 0) IM->Flag[IM->Start] |= sf;
  68
  69          IM->Count = IM->Start + nr;
  70          j += nr;
  71
  72          if (j == count)
  73             _tnl_end( ctx );
  74
  75          _tnl_flush_immediate( IM );
  76       }
  77    }
  78 #else
  79    /* Simple alternative to above code.
  80     */
  81    if (_tnl_hard_begin( ctx, mode ))
  82    {
  83       GLuint i;
  84       for (i=start;i<count;i++) {
  85          _tnl_array_element( ctx, i );
  86       }
  87       _tnl_end( ctx );
  88    }
  89 #endif
  90 }
  91
  92
  93 static void _tnl_draw_elements( GLcontext *ctx, GLenum mode, GLsizei count,
  94                                 const GLuint *indices)
  95 {
  96 #if 1
  97    /* Optimized code that fakes the effect of calling
  98     * _tnl_array_element for each index in the list.
  99     */
 100    if (_tnl_hard_begin( ctx, mode )) {
 101       GLuint i,j;
 102       for (j = 0 ; j < count ; ) {
 103          struct immediate *IM = TNL_CURRENT_IM(ctx);
 104          GLuint start = IM->Start;
 105          GLuint nr = MIN2( IMM_MAXDATA - start, count - j ) + start;
 106          GLuint sf = IM->Flag[start];
 107          IM->FlushElt |= 1;
 108
 109          for (i = start ; i < nr ; i++) {
 110             IM->Elt[i] = (GLuint) *indices++;
 111             IM->Flag[i] = VERT_ELT;
 112          }
 113
 114          if (j == 0) IM->Flag[start] |= sf;
 115
 116          IM->Count = nr;
 117          j += nr - start;
 118
 119          if (j == count)
 120             _tnl_end( ctx );
 121
 122          _tnl_flush_immediate( IM );
 123       }
 124    }
 125 #else
 126    /* Simple version of the above code.
 127     */
 128    if (_tnl_hard_begin(ctx, mode)) {
 129       GLuint i;
 130       for (i = 0 ; i < count ; i++)
 131          _tnl_array_element( ctx, indices[i] );
 132       _tnl_end( ctx );
 133    }
 134 #endif
 135 }
 136
 137
 138 static void _tnl_draw_range_elements( GLcontext *ctx, GLenum mode,
 139                                       GLuint start, GLuint end,
 140                                       GLsizei count, const GLuint *indices )
 141
 142 {
 143    TNLcontext *tnl = TNL_CONTEXT(ctx);
 144    FLUSH_CURRENT( ctx, 0 );
 145
 146    _tnl_vb_bind_arrays( ctx, start, end );
 147
 148    tnl->vb.FirstPrimitive = 0;
 149    tnl->vb.Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 150    tnl->vb.PrimitiveLength[0] = count;
 151    tnl->vb.Elts = (GLuint *)indices;
 152
 153    if (ctx->Array.LockCount)
 154       _tnl_run_pipeline( ctx );
 155    else {
 156       /* Note that arrays may have changed before/after execution.
 157        */
 158       tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 159       _tnl_run_pipeline( ctx );
 160       tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 161    }
 162 }
 163
 164
 165
 166
 167 void
 168 _tnl_DrawArrays(GLenum mode, GLint start, GLsizei count)
 169 {
 170    GET_CURRENT_CONTEXT(ctx);
 171    TNLcontext *tnl = TNL_CONTEXT(ctx);
 172    struct vertex_buffer *VB = &tnl->vb;
 173
 174    /* Check arguments, etc.
 175     */
 176    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 177       return;
 178
 179    if (tnl->pipeline.build_state_changes)
 180       _tnl_validate_pipeline( ctx );
 181
 182    if (!ctx->CompileFlag && count - start < ctx->Const.MaxArrayLockSize) {
 183       FLUSH_CURRENT( ctx, 0 );
 184
 185       if (ctx->Array.LockCount)
 186       {
 187          if (start < ctx->Array.LockFirst) start = ctx->Array.LockFirst;
 188          if (count > ctx->Array.LockCount) count = ctx->Array.LockCount;
 189          if (start >= count) return;
 190
 191          /* Locked drawarrays.  Reuse any previously transformed data.
 192           */
 193          _tnl_vb_bind_arrays( ctx, ctx->Array.LockFirst, ctx->Array.LockCount );
 194          VB->FirstPrimitive = start;
 195          VB->Primitive[start] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 196          VB->PrimitiveLength[start] = count - start;
 197          _tnl_run_pipeline( ctx );
 198       } else {
 199          /* The arrays are small enough to fit in a single VB; just bind
 200           * them and go.  Any untransformed data will be copied on
 201           * clipping.
 202           *
 203           * Invalidate any locked data dependent on these arrays.
 204           */
 205          _tnl_vb_bind_arrays( ctx, start, count );
 206          VB->FirstPrimitive = 0;
 207          VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 208          VB->PrimitiveLength[0] = count - start;
 209          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 210          _tnl_run_pipeline( ctx );
 211          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 212       }
 213    }
 214    else if (!ctx->CompileFlag && mode == GL_TRIANGLE_STRIP) {
 215       int bufsz = (ctx->Const.MaxArrayLockSize - 2) & ~1;
 216       int j, nr;
 217
 218       FLUSH_CURRENT( ctx, 0 );
 219
 220       /* TODO: other non-fan primitives.
 221        */
 222       for (j = start ; j < count - 2; j += nr - 2 ) {
 223          nr = MIN2( bufsz, count - j );
 224          _tnl_vb_bind_arrays( ctx, j, j + nr );
 225          VB->FirstPrimitive = 0;
 226          VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 227          VB->PrimitiveLength[0] = nr;
 228          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 229          _tnl_run_pipeline( ctx );
 230          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 231       }
 232    } else {
 233       fallback_drawarrays( ctx, mode, start, count );
 234    }
 235 }
 236
 237
 238 void
 239 _tnl_DrawRangeElements(GLenum mode,
 240                        GLuint start, GLuint end,
 241                        GLsizei count, GLenum type, const GLvoid *indices)
 242 {
 243    GET_CURRENT_CONTEXT(ctx);
 244    TNLcontext *tnl = TNL_CONTEXT(ctx);
 245    GLuint *ui_indices;
 246
 247    /* Check arguments, etc.
 248     */
 249    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
 250                                           type, indices ))
 251       return;
 252
 253    if (tnl->pipeline.build_state_changes)
 254       _tnl_validate_pipeline( ctx );
 255
 256    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 257                                                count, type, indices );
 258
 259
 260    if (ctx->Array.LockCount) {
 261       /* Are the arrays already locked?  If so we currently have to look
 262        * at the whole locked range.
 263        */
 264       if (start >= ctx->Array.LockFirst && end <= ctx->Array.LockCount)
 265          _tnl_draw_range_elements( ctx, mode,
 266                                    ctx->Array.LockFirst,
 267                                    ctx->Array.LockCount,
 268                                    count, ui_indices );
 269       else {
 270          /* The spec says referencing elements outside the locked
 271           * range is undefined.  I'm going to make it a noop this time
 272           * round, maybe come up with something beter before 3.6.
 273           *
 274           * May be able to get away with just setting LockCount==0,
 275           * though this raises the problems of dependent state.  May
 276           * have to call glUnlockArrays() directly?
 277           *
 278           * Or scan the list and replace bad indices?
 279           */
 280          gl_problem( ctx,
 281                      "DrawRangeElements references "
 282                      "elements outside locked range.");
 283       }
 284    }
 285    else if (end + 1 - start < ctx->Const.MaxArrayLockSize) {
 286       /* The arrays aren't locked but we can still fit them inside a
 287        * single vertexbuffer.
 288        */
 289       _tnl_draw_range_elements( ctx, mode, start, end + 1, count, ui_indices );
 290    } else {
 291       /* Range is too big to optimize:
 292        */
 293       _tnl_draw_elements( ctx, mode, count, ui_indices );
 294    }
 295 }
 296
 297
 298
 299 void
 300 _tnl_DrawElements(GLenum mode, GLsizei count, GLenum type,
 301                   const GLvoid *indices)
 302 {
 303    GET_CURRENT_CONTEXT(ctx);
 304    TNLcontext *tnl = TNL_CONTEXT(ctx);
 305    GLuint *ui_indices;
 306
 307    /* Check arguments, etc.
 308     */
 309    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 310       return;
 311
 312    if (tnl->pipeline.build_state_changes)
 313       _tnl_validate_pipeline( ctx );
 314
 315    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 316                                                count, type, indices );
 317
 318    if (ctx->Array.LockCount) {
 319       _tnl_draw_range_elements( ctx, mode,
 320                                 ctx->Array.LockFirst,
 321                                 ctx->Array.LockCount,
 322                                 count, ui_indices );
 323    }
 324    else {
 325       /* Scan the index list and see if we can use the locked path anyway.
 326        */
 327       GLuint max_elt = 0;
 328       GLuint i;
 329
 330       for (i = 0 ; i < count ; i++)
 331          if (ui_indices[i] > max_elt) max_elt = ui_indices[i];
 332
 333       if (max_elt < ctx->Const.MaxArrayLockSize && /* can we use it? */
 334           max_elt < count)                         /* do we want to use it? */
 335          _tnl_draw_range_elements( ctx, mode, 0, max_elt+1, count, ui_indices );
 336       else
 337          _tnl_draw_elements( ctx, mode, count, ui_indices );
 338    }
 339 }
 340
 341
 342 void _tnl_array_init( GLcontext *ctx )
 343 {
 344    TNLcontext *tnl = TNL_CONTEXT(ctx);
 345    struct vertex_arrays *tmp = &tnl->array_inputs;
 346    GLvertexformat *vfmt = &(TNL_CONTEXT(ctx)->vtxfmt);
 347    GLuint i;
 348
 349    vfmt->DrawArrays = _tnl_DrawArrays;
 350    vfmt->DrawElements = _tnl_DrawElements;
 351    vfmt->DrawRangeElements = _tnl_DrawRangeElements;
 352
 353    /* Setup vector pointers that will be used to bind arrays to VB's.
 354     */
 355    gl_vector4f_init( &tmp->Obj, 0, 0 );
 356    gl_vector3f_init( &tmp->Normal, 0, 0 );
 357 #if CHAN_TYPE == GL_UNSIGNED_BYTE
 358    gl_vector4ub_init( &tmp->Color, 0, 0 );
 359    gl_vector4ub_init( &tmp->SecondaryColor, 0, 0 );
 360 #elif CHAN_TYPE == GL_UNSIGNED_SHORT
 361    gl_vector4us_init( &tmp->Color, 0, 0 );
 362    gl_vector4us_init( &tmp->SecondaryColor, 0, 0 );
 363 #elif CHAN_TYPE == GL_FLOAT
 364    gl_vector4f_init( &tmp->Color, 0, 0 );
 365    gl_vector4f_init( &tmp->SecondaryColor, 0, 0 );
 366 #endif
 367    gl_vector1f_init( &tmp->FogCoord, 0, 0 );
 368    gl_vector1ui_init( &tmp->Index, 0, 0 );
 369    gl_vector1ub_init( &tmp->EdgeFlag, 0, 0 );
 370
 371    for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
 372       gl_vector4f_init( &tmp->TexCoord[i], 0, 0);
 373
 374    tnl->tmp_primitive = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 375    tnl->tmp_primitive_length = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 376 }
 377
 378
 379 void _tnl_array_destroy( GLcontext *ctx )
 380 {
 381    TNLcontext *tnl = TNL_CONTEXT(ctx);
 382    if (tnl->tmp_primitive_length) FREE(tnl->tmp_primitive_length);
 383    if (tnl->tmp_primitive) FREE(tnl->tmp_primitive);
 384 }