src/mesa/tnl/t_array_api.c

   1 /* $Id: t_array_api.c,v 1.9 2001/03/07 05:06:13 brianp 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       GLint j;
  60       for (j = 0 ; j < count ; ) {
  61          struct immediate *IM = TNL_CURRENT_IM(ctx);
  62          GLuint nr = MIN2( IMM_MAXDATA - IM->Start, (GLuint) (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       GLint i, j;
 102       for (j = 0 ; j < count ; ) {
 103          struct immediate *IM = TNL_CURRENT_IM(ctx);
 104          GLuint start = IM->Start;
 105          GLint nr = MIN2( (GLint) (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 < (GLint) ctx->Const.MaxArrayLockSize) {
 183       FLUSH_CURRENT( ctx, 0 );
 184
 185       if (ctx->Array.LockCount)
 186       {
 187          if (start < (GLint) ctx->Array.LockFirst)
 188             start = ctx->Array.LockFirst;
 189          if (count > (GLint) ctx->Array.LockCount)
 190             count = ctx->Array.LockCount;
 191          if (start >= count)
 192             return;
 193
 194          /* Locked drawarrays.  Reuse any previously transformed data.
 195           */
 196          _tnl_vb_bind_arrays( ctx, ctx->Array.LockFirst, ctx->Array.LockCount );
 197          VB->FirstPrimitive = start;
 198          VB->Primitive[start] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 199          VB->PrimitiveLength[start] = count - start;
 200          _tnl_run_pipeline( ctx );
 201       } else {
 202          /* The arrays are small enough to fit in a single VB; just bind
 203           * them and go.  Any untransformed data will be copied on
 204           * clipping.
 205           *
 206           * Invalidate any locked data dependent on these arrays.
 207           */
 208          _tnl_vb_bind_arrays( ctx, start, count );
 209          VB->FirstPrimitive = 0;
 210          VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 211          VB->PrimitiveLength[0] = count - start;
 212          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 213          _tnl_run_pipeline( ctx );
 214          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 215       }
 216    }
 217    else if (!ctx->CompileFlag && mode == GL_TRIANGLE_STRIP) {
 218       int bufsz = (ctx->Const.MaxArrayLockSize - 2) & ~1;
 219       int j, nr;
 220
 221       FLUSH_CURRENT( ctx, 0 );
 222
 223       /* TODO: other non-fan primitives.
 224        */
 225       for (j = start ; j < count - 2; j += nr - 2 ) {
 226          nr = MIN2( bufsz, count - j );
 227          _tnl_vb_bind_arrays( ctx, j, j + nr );
 228          VB->FirstPrimitive = 0;
 229          VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 230          VB->PrimitiveLength[0] = nr;
 231          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 232          _tnl_run_pipeline( ctx );
 233          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 234       }
 235    } else {
 236       fallback_drawarrays( ctx, mode, start, count );
 237    }
 238 }
 239
 240
 241 void
 242 _tnl_DrawRangeElements(GLenum mode,
 243                        GLuint start, GLuint end,
 244                        GLsizei count, GLenum type, const GLvoid *indices)
 245 {
 246    GET_CURRENT_CONTEXT(ctx);
 247    TNLcontext *tnl = TNL_CONTEXT(ctx);
 248    GLuint *ui_indices;
 249
 250    /* Check arguments, etc.
 251     */
 252    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
 253                                           type, indices ))
 254       return;
 255
 256    if (tnl->pipeline.build_state_changes)
 257       _tnl_validate_pipeline( ctx );
 258
 259    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 260                                                count, type, indices );
 261
 262
 263    if (ctx->Array.LockCount) {
 264       /* Are the arrays already locked?  If so we currently have to look
 265        * at the whole locked range.
 266        */
 267       if (start >= ctx->Array.LockFirst && end <= ctx->Array.LockCount)
 268          _tnl_draw_range_elements( ctx, mode,
 269                                    ctx->Array.LockFirst,
 270                                    ctx->Array.LockCount,
 271                                    count, ui_indices );
 272       else {
 273          /* The spec says referencing elements outside the locked
 274           * range is undefined.  I'm going to make it a noop this time
 275           * round, maybe come up with something beter before 3.6.
 276           *
 277           * May be able to get away with just setting LockCount==0,
 278           * though this raises the problems of dependent state.  May
 279           * have to call glUnlockArrays() directly?
 280           *
 281           * Or scan the list and replace bad indices?
 282           */
 283          _mesa_problem( ctx,
 284                      "DrawRangeElements references "
 285                      "elements outside locked range.");
 286       }
 287    }
 288    else if (end + 1 - start < ctx->Const.MaxArrayLockSize) {
 289       /* The arrays aren't locked but we can still fit them inside a
 290        * single vertexbuffer.
 291        */
 292       _tnl_draw_range_elements( ctx, mode, start, end + 1, count, ui_indices );
 293    } else {
 294       /* Range is too big to optimize:
 295        */
 296       _tnl_draw_elements( ctx, mode, count, ui_indices );
 297    }
 298 }
 299
 300
 301
 302 void
 303 _tnl_DrawElements(GLenum mode, GLsizei count, GLenum type,
 304                   const GLvoid *indices)
 305 {
 306    GET_CURRENT_CONTEXT(ctx);
 307    TNLcontext *tnl = TNL_CONTEXT(ctx);
 308    GLuint *ui_indices;
 309
 310    /* Check arguments, etc.
 311     */
 312    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 313       return;
 314
 315    if (tnl->pipeline.build_state_changes)
 316       _tnl_validate_pipeline( ctx );
 317
 318    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 319                                                count, type, indices );
 320
 321    if (ctx->Array.LockCount) {
 322       _tnl_draw_range_elements( ctx, mode,
 323                                 ctx->Array.LockFirst,
 324                                 ctx->Array.LockCount,
 325                                 count, ui_indices );
 326    }
 327    else {
 328       /* Scan the index list and see if we can use the locked path anyway.
 329        */
 330       GLuint max_elt = 0;
 331       GLint i;
 332
 333       for (i = 0 ; i < count ; i++)
 334          if (ui_indices[i] > max_elt)
 335             max_elt = ui_indices[i];
 336
 337       if (max_elt < ctx->Const.MaxArrayLockSize && /* can we use it? */
 338           max_elt < (GLuint) count)                /* do we want to use it? */
 339          _tnl_draw_range_elements( ctx, mode, 0, max_elt+1, count, ui_indices );
 340       else
 341          _tnl_draw_elements( ctx, mode, count, ui_indices );
 342    }
 343 }
 344
 345
 346 void _tnl_array_init( GLcontext *ctx )
 347 {
 348    TNLcontext *tnl = TNL_CONTEXT(ctx);
 349    struct vertex_arrays *tmp = &tnl->array_inputs;
 350    GLvertexformat *vfmt = &(TNL_CONTEXT(ctx)->vtxfmt);
 351    GLuint i;
 352
 353    vfmt->DrawArrays = _tnl_DrawArrays;
 354    vfmt->DrawElements = _tnl_DrawElements;
 355    vfmt->DrawRangeElements = _tnl_DrawRangeElements;
 356
 357    /* Setup vector pointers that will be used to bind arrays to VB's.
 358     */
 359    _mesa_vector4f_init( &tmp->Obj, 0, 0 );
 360    _mesa_vector3f_init( &tmp->Normal, 0, 0 );
 361    _mesa_vector4chan_init( &tmp->Color, 0, 0 );
 362    _mesa_vector4chan_init( &tmp->SecondaryColor, 0, 0 );
 363    _mesa_vector1f_init( &tmp->FogCoord, 0, 0 );
 364    _mesa_vector1ui_init( &tmp->Index, 0, 0 );
 365    _mesa_vector1ub_init( &tmp->EdgeFlag, 0, 0 );
 366
 367    for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
 368       _mesa_vector4f_init( &tmp->TexCoord[i], 0, 0);
 369
 370    tnl->tmp_primitive = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 371    tnl->tmp_primitive_length = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 372 }
 373
 374
 375 void _tnl_array_destroy( GLcontext *ctx )
 376 {
 377    TNLcontext *tnl = TNL_CONTEXT(ctx);
 378    if (tnl->tmp_primitive_length) FREE(tnl->tmp_primitive_length);
 379    if (tnl->tmp_primitive) FREE(tnl->tmp_primitive);
 380 }