src/mesa/tnl/t_array_api.c

   1 /* $Id: t_array_api.c,v 1.28 2002/10/24 23:57:25 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  4.1
   6  *
   7  * Copyright (C) 1999-2002  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
  27 /**
  28  * \file vpexec.c
  29  * \brief Vertex array API functions (glDrawArrays, etc)
  30  * \author Keith Whitwell
  31  */
  32
  33 #include "glheader.h"
  34 #include "api_validate.h"
  35 #include "context.h"
  36 #include "imports.h"
  37 #include "macros.h"
  38 #include "mmath.h"
  39 #include "mtypes.h"
  40 #include "state.h"
  41
  42 #include "array_cache/acache.h"
  43
  44 #include "t_array_api.h"
  45 #include "t_array_import.h"
  46 #include "t_imm_api.h"
  47 #include "t_imm_exec.h"
  48 #include "t_context.h"
  49 #include "t_pipeline.h"
  50
  51 static void fallback_drawarrays( GLcontext *ctx, GLenum mode, GLint start,
  52                                  GLsizei count )
  53 {
  54    if (_tnl_hard_begin( ctx, mode )) {
  55       GLint i;
  56       for (i = start; i < count; i++)
  57          glArrayElement( i );
  58       glEnd();
  59    }
  60 }
  61
  62
  63 static void fallback_drawelements( GLcontext *ctx, GLenum mode, GLsizei count,
  64                                    const GLuint *indices)
  65 {
  66    if (_tnl_hard_begin(ctx, mode)) {
  67       GLint i;
  68       for (i = 0 ; i < count ; i++)
  69          glArrayElement( indices[i] );
  70       glEnd();
  71    }
  72 }
  73
  74
  75 static void _tnl_draw_range_elements( GLcontext *ctx, GLenum mode,
  76                                       GLuint start, GLuint end,
  77                                       GLsizei count, const GLuint *indices )
  78
  79 {
  80    TNLcontext *tnl = TNL_CONTEXT(ctx);
  81    FLUSH_CURRENT( ctx, 0 );
  82
  83    /*  _mesa_debug(ctx, "%s\n", __FUNCTION__); */
  84    if (tnl->pipeline.build_state_changes)
  85       _tnl_validate_pipeline( ctx );
  86
  87    _tnl_vb_bind_arrays( ctx, start, end );
  88
  89    tnl->vb.FirstPrimitive = 0;
  90    tnl->vb.Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
  91    tnl->vb.PrimitiveLength[0] = count;
  92    tnl->vb.Elts = (GLuint *)indices;
  93
  94    if (ctx->Array.LockCount)
  95       tnl->Driver.RunPipeline( ctx );
  96    else {
  97       /* Note that arrays may have changed before/after execution.
  98        */
  99       tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 100       tnl->Driver.RunPipeline( ctx );
 101       tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 102    }
 103 }
 104
 105
 106
 107 /**
 108  * Called via the GL API dispatcher.
 109  */
 110 void
 111 _tnl_DrawArrays(GLenum mode, GLint start, GLsizei count)
 112 {
 113    GET_CURRENT_CONTEXT(ctx);
 114    TNLcontext *tnl = TNL_CONTEXT(ctx);
 115    struct vertex_buffer *VB = &tnl->vb;
 116    GLuint thresh = (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) ? 30 : 10;
 117
 118    if (MESA_VERBOSE & VERBOSE_API)
 119       _mesa_debug(NULL, "_tnl_DrawArrays %d %d\n", start, count);
 120
 121    /* Check arguments, etc.
 122     */
 123    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 124       return;
 125
 126    if (tnl->pipeline.build_state_changes)
 127       _tnl_validate_pipeline( ctx );
 128
 129    if (ctx->CompileFlag) {
 130       fallback_drawarrays( ctx, mode, start, start + count );
 131    }
 132    else if (!ctx->Array.LockCount && (GLuint) count < thresh) {
 133       /* Small primitives: attempt to share a vb (at the expense of
 134        * using the immediate interface).
 135       */
 136       fallback_drawarrays( ctx, mode, start, start + count );
 137    }
 138    else if (ctx->Array.LockCount &&
 139             count < (GLint) ctx->Const.MaxArrayLockSize) {
 140
 141       /* Locked primitives which can fit in a single vertex buffer:
 142        */
 143       FLUSH_CURRENT( ctx, 0 );
 144
 145       if (start < (GLint) ctx->Array.LockFirst)
 146          start = ctx->Array.LockFirst;
 147       if (start + count > (GLint) ctx->Array.LockCount)
 148          count = ctx->Array.LockCount - start;
 149
 150       /* Locked drawarrays.  Reuse any previously transformed data.
 151        */
 152       _tnl_vb_bind_arrays( ctx, ctx->Array.LockFirst, ctx->Array.LockCount );
 153       VB->FirstPrimitive = start;
 154       VB->Primitive[start] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 155       VB->PrimitiveLength[start] = count;
 156       tnl->Driver.RunPipeline( ctx );
 157    }
 158    else {
 159       int bufsz = 256;          /* Use a small buffer for cache goodness */
 160       int j, nr;
 161       int minimum, modulo, skip;
 162
 163       /* Large primitives requiring decomposition to multiple vertex
 164        * buffers:
 165        */
 166       switch (mode) {
 167       case GL_POINTS:
 168          minimum = 0;
 169          modulo = 1;
 170          skip = 0;
 171       case GL_LINES:
 172          minimum = 1;
 173          modulo = 2;
 174          skip = 1;
 175       case GL_LINE_STRIP:
 176          minimum = 1;
 177          modulo = 1;
 178          skip = 0;
 179          break;
 180       case GL_TRIANGLES:
 181          minimum = 2;
 182          modulo = 3;
 183          skip = 2;
 184          break;
 185       case GL_TRIANGLE_STRIP:
 186          minimum = 2;
 187          modulo = 1;
 188          skip = 0;
 189          break;
 190       case GL_QUADS:
 191          minimum = 3;
 192          modulo = 4;
 193          skip = 3;
 194          break;
 195       case GL_QUAD_STRIP:
 196          minimum = 3;
 197          modulo = 2;
 198          skip = 0;
 199          break;
 200       case GL_LINE_LOOP:
 201       case GL_TRIANGLE_FAN:
 202       case GL_POLYGON:
 203       default:
 204          /* Primitives requiring a copied vertex (fan-like primitives)
 205           * must use the slow path if they cannot fit in a single
 206           * vertex buffer.
 207           */
 208          if (count < (GLint) ctx->Const.MaxArrayLockSize) {
 209             bufsz = ctx->Const.MaxArrayLockSize;
 210             minimum = 0;
 211             modulo = 1;
 212             skip = 0;
 213          }
 214          else {
 215             fallback_drawarrays( ctx, mode, start, start + count );
 216             return;
 217          }
 218       }
 219
 220       FLUSH_CURRENT( ctx, 0 );
 221
 222       bufsz -= bufsz % modulo;
 223       bufsz -= minimum;
 224       count += start;
 225
 226       for (j = start + minimum ; j < count ; j += nr + skip ) {
 227
 228          nr = MIN2( bufsz, count - j );
 229
 230          _tnl_vb_bind_arrays( ctx, j - minimum, j + nr );
 231
 232          VB->FirstPrimitive = 0;
 233          VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 234          VB->PrimitiveLength[0] = nr + minimum;
 235          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 236          tnl->Driver.RunPipeline( ctx );
 237          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 238       }
 239    }
 240 }
 241
 242
 243 /**
 244  * Called via the GL API dispatcher.
 245  */
 246 void
 247 _tnl_DrawRangeElements(GLenum mode,
 248                        GLuint start, GLuint end,
 249                        GLsizei count, GLenum type, const GLvoid *indices)
 250 {
 251    GET_CURRENT_CONTEXT(ctx);
 252    GLuint *ui_indices;
 253
 254    if (MESA_VERBOSE & VERBOSE_API)
 255       _mesa_debug(NULL, "_tnl_DrawRangeElements %d %d %d\n", start, end, count);
 256
 257    /* Check arguments, etc.
 258     */
 259    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
 260                                           type, indices ))
 261       return;
 262
 263    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 264                                                count, type, indices );
 265
 266
 267    if (ctx->CompileFlag) {
 268       /* Can't do anything when compiling:
 269        */
 270       fallback_drawelements( ctx, mode, count, ui_indices );
 271    }
 272    else if (ctx->Array.LockCount) {
 273       /* Are the arrays already locked?  If so we currently have to look
 274        * at the whole locked range.
 275        */
 276       if (start >= ctx->Array.LockFirst && end <= ctx->Array.LockCount)
 277          _tnl_draw_range_elements( ctx, mode,
 278                                    ctx->Array.LockFirst,
 279                                    ctx->Array.LockCount,
 280                                    count, ui_indices );
 281       else {
 282          /* The spec says referencing elements outside the locked
 283           * range is undefined.  I'm going to make it a noop this time
 284           * round, maybe come up with something beter before 3.6.
 285           *
 286           * May be able to get away with just setting LockCount==0,
 287           * though this raises the problems of dependent state.  May
 288           * have to call glUnlockArrays() directly?
 289           *
 290           * Or scan the list and replace bad indices?
 291           */
 292          _mesa_problem( ctx,
 293                      "DrawRangeElements references "
 294                      "elements outside locked range.");
 295       }
 296    }
 297    else if (end + 1 - start < ctx->Const.MaxArrayLockSize) {
 298       /* The arrays aren't locked but we can still fit them inside a
 299        * single vertexbuffer.
 300        */
 301       _tnl_draw_range_elements( ctx, mode, start, end + 1, count, ui_indices );
 302    } else {
 303       /* Range is too big to optimize:
 304        */
 305       fallback_drawelements( ctx, mode, count, ui_indices );
 306    }
 307 }
 308
 309
 310
 311 /**
 312  * Called via the GL API dispatcher.
 313  */
 314 void
 315 _tnl_DrawElements(GLenum mode, GLsizei count, GLenum type,
 316                   const GLvoid *indices)
 317 {
 318    GET_CURRENT_CONTEXT(ctx);
 319    GLuint *ui_indices;
 320
 321    if (MESA_VERBOSE & VERBOSE_API)
 322       _mesa_debug(NULL, "_tnl_DrawElements %d\n", count);
 323
 324    /* Check arguments, etc.
 325     */
 326    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 327       return;
 328
 329    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 330                                                count, type, indices );
 331
 332    if (ctx->CompileFlag) {
 333       /* Can't do anything when compiling:
 334        */
 335       fallback_drawelements( ctx, mode, count, ui_indices );
 336    }
 337    else if (ctx->Array.LockCount) {
 338       _tnl_draw_range_elements( ctx, mode,
 339                                 ctx->Array.LockFirst,
 340                                 ctx->Array.LockCount,
 341                                 count, ui_indices );
 342    }
 343    else {
 344       /* Scan the index list and see if we can use the locked path anyway.
 345        */
 346       GLuint max_elt = 0;
 347       GLint i;
 348
 349       for (i = 0 ; i < count ; i++)
 350          if (ui_indices[i] > max_elt)
 351             max_elt = ui_indices[i];
 352
 353       if (max_elt < ctx->Const.MaxArrayLockSize && /* can we use it? */
 354           max_elt < (GLuint) count)                /* do we want to use it? */
 355          _tnl_draw_range_elements( ctx, mode, 0, max_elt+1, count, ui_indices );
 356       else
 357          fallback_drawelements( ctx, mode, count, ui_indices );
 358    }
 359 }
 360
 361
 362 /**
 363  * Initialize context's vertex array fields.  Called during T 'n L context
 364  * creation.
 365  */
 366 void _tnl_array_init( GLcontext *ctx )
 367 {
 368    TNLcontext *tnl = TNL_CONTEXT(ctx);
 369    struct vertex_arrays *tmp = &tnl->array_inputs;
 370    GLvertexformat *vfmt = &(TNL_CONTEXT(ctx)->vtxfmt);
 371    GLuint i;
 372
 373    vfmt->DrawArrays = _tnl_DrawArrays;
 374    vfmt->DrawElements = _tnl_DrawElements;
 375    vfmt->DrawRangeElements = _tnl_DrawRangeElements;
 376
 377    /* Setup vector pointers that will be used to bind arrays to VB's.
 378     */
 379    _mesa_vector4f_init( &tmp->Obj, 0, 0 );
 380    _mesa_vector4f_init( &tmp->Normal, 0, 0 );
 381    _mesa_vector4f_init( &tmp->FogCoord, 0, 0 );
 382    _mesa_vector1ui_init( &tmp->Index, 0, 0 );
 383    _mesa_vector1ub_init( &tmp->EdgeFlag, 0, 0 );
 384
 385    for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
 386       _mesa_vector4f_init( &tmp->TexCoord[i], 0, 0);
 387
 388    tnl->tmp_primitive = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 389    tnl->tmp_primitive_length = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 390 }
 391
 392
 393 /**
 394  * Destroy the context's vertex array stuff.
 395  * Called during T 'n L context destruction.
 396  */
 397 void _tnl_array_destroy( GLcontext *ctx )
 398 {
 399    TNLcontext *tnl = TNL_CONTEXT(ctx);
 400    if (tnl->tmp_primitive_length) FREE(tnl->tmp_primitive_length);
 401    if (tnl->tmp_primitive) FREE(tnl->tmp_primitive);
 402 }