src/mesa/tnl/t_array_api.c

   1 /* $Id: t_array_api.c,v 1.31 2003/03/01 01:50:26 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  5.1
   6  *
   7  * Copyright (C) 1999-2003  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 t_array_api.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 "mtypes.h"
  39 #include "state.h"
  40
  41 #include "array_cache/acache.h"
  42
  43 #include "t_array_api.h"
  44 #include "t_array_import.h"
  45 #include "t_imm_api.h"
  46 #include "t_imm_exec.h"
  47 #include "t_context.h"
  48 #include "t_pipeline.h"
  49
  50 static void fallback_drawarrays( GLcontext *ctx, GLenum mode, GLint start,
  51                                  GLsizei count )
  52 {
  53    if (_tnl_hard_begin( ctx, mode )) {
  54       GLint i;
  55       for (i = start; i < count; i++)
  56          glArrayElement( i );
  57       glEnd();
  58    }
  59 }
  60
  61
  62 static void fallback_drawelements( GLcontext *ctx, GLenum mode, GLsizei count,
  63                                    const GLuint *indices)
  64 {
  65    if (_tnl_hard_begin(ctx, mode)) {
  66       GLint i;
  67       for (i = 0 ; i < count ; i++)
  68          glArrayElement( indices[i] );
  69       glEnd();
  70    }
  71 }
  72
  73
  74 static void _tnl_draw_range_elements( GLcontext *ctx, GLenum mode,
  75                                       GLuint start, GLuint end,
  76                                       GLsizei count, const GLuint *indices )
  77
  78 {
  79    TNLcontext *tnl = TNL_CONTEXT(ctx);
  80    FLUSH_CURRENT( ctx, 0 );
  81
  82    /*  _mesa_debug(ctx, "%s\n", __FUNCTION__); */
  83    if (tnl->pipeline.build_state_changes)
  84       _tnl_validate_pipeline( ctx );
  85
  86    _tnl_vb_bind_arrays( ctx, start, end );
  87
  88    tnl->vb.FirstPrimitive = 0;
  89    tnl->vb.Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
  90    tnl->vb.PrimitiveLength[0] = count;
  91    tnl->vb.Elts = (GLuint *)indices;
  92
  93    if (ctx->Array.LockCount)
  94       tnl->Driver.RunPipeline( ctx );
  95    else {
  96       /* Note that arrays may have changed before/after execution.
  97        */
  98       tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
  99       tnl->Driver.RunPipeline( ctx );
 100       tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 101    }
 102 }
 103
 104
 105
 106 /**
 107  * Called via the GL API dispatcher.
 108  */
 109 void
 110 _tnl_DrawArrays(GLenum mode, GLint start, GLsizei count)
 111 {
 112    GET_CURRENT_CONTEXT(ctx);
 113    TNLcontext *tnl = TNL_CONTEXT(ctx);
 114    struct vertex_buffer *VB = &tnl->vb;
 115    GLuint thresh = (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) ? 30 : 10;
 116
 117    if (MESA_VERBOSE & VERBOSE_API)
 118       _mesa_debug(NULL, "_tnl_DrawArrays %d %d\n", start, count);
 119
 120    /* Check arguments, etc.
 121     */
 122    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 123       return;
 124
 125    if (tnl->pipeline.build_state_changes)
 126       _tnl_validate_pipeline( ctx );
 127
 128    if (ctx->CompileFlag) {
 129       fallback_drawarrays( ctx, mode, start, start + count );
 130    }
 131    else if (!ctx->Array.LockCount && (GLuint) count < thresh) {
 132       /* Small primitives: attempt to share a vb (at the expense of
 133        * using the immediate interface).
 134       */
 135       fallback_drawarrays( ctx, mode, start, start + count );
 136    }
 137    else if (ctx->Array.LockCount &&
 138             count < (GLint) ctx->Const.MaxArrayLockSize) {
 139
 140       /* Locked primitives which can fit in a single vertex buffer:
 141        */
 142       FLUSH_CURRENT( ctx, 0 );
 143
 144       if (start < (GLint) ctx->Array.LockFirst)
 145          start = ctx->Array.LockFirst;
 146       if (start + count > (GLint) ctx->Array.LockCount)
 147          count = ctx->Array.LockCount - start;
 148
 149       /* Locked drawarrays.  Reuse any previously transformed data.
 150        */
 151       _tnl_vb_bind_arrays( ctx, ctx->Array.LockFirst, ctx->Array.LockCount );
 152       VB->FirstPrimitive = start;
 153       VB->Primitive[start] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 154       VB->PrimitiveLength[start] = count;
 155       tnl->Driver.RunPipeline( ctx );
 156    }
 157    else {
 158       int bufsz = 256;          /* Use a small buffer for cache goodness */
 159       int j, nr;
 160       int minimum, modulo, skip;
 161
 162       /* Large primitives requiring decomposition to multiple vertex
 163        * buffers:
 164        */
 165       switch (mode) {
 166       case GL_POINTS:
 167          minimum = 0;
 168          modulo = 1;
 169          skip = 0;
 170          break;
 171       case GL_LINES:
 172          minimum = 1;
 173          modulo = 2;
 174          skip = 1;
 175          break;
 176       case GL_LINE_STRIP:
 177          minimum = 1;
 178          modulo = 1;
 179          skip = 0;
 180          break;
 181       case GL_TRIANGLES:
 182          minimum = 2;
 183          modulo = 3;
 184          skip = 2;
 185          break;
 186       case GL_TRIANGLE_STRIP:
 187          minimum = 2;
 188          modulo = 1;
 189          skip = 0;
 190          break;
 191       case GL_QUADS:
 192          minimum = 3;
 193          modulo = 4;
 194          skip = 3;
 195          break;
 196       case GL_QUAD_STRIP:
 197          minimum = 3;
 198          modulo = 2;
 199          skip = 0;
 200          break;
 201       case GL_LINE_LOOP:
 202       case GL_TRIANGLE_FAN:
 203       case GL_POLYGON:
 204       default:
 205          /* Primitives requiring a copied vertex (fan-like primitives)
 206           * must use the slow path if they cannot fit in a single
 207           * vertex buffer.
 208           */
 209          if (count < (GLint) ctx->Const.MaxArrayLockSize) {
 210             bufsz = ctx->Const.MaxArrayLockSize;
 211             minimum = 0;
 212             modulo = 1;
 213             skip = 0;
 214          }
 215          else {
 216             fallback_drawarrays( ctx, mode, start, start + count );
 217             return;
 218          }
 219       }
 220
 221       FLUSH_CURRENT( ctx, 0 );
 222
 223       bufsz -= bufsz % modulo;
 224       bufsz -= minimum;
 225       count += start;
 226
 227       for (j = start + minimum ; j < count ; j += nr + skip ) {
 228
 229          nr = MIN2( bufsz, count - j );
 230
 231          _tnl_vb_bind_arrays( ctx, j - minimum, j + nr );
 232
 233          VB->FirstPrimitive = 0;
 234          VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 235          VB->PrimitiveLength[0] = nr + minimum;
 236          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 237          tnl->Driver.RunPipeline( ctx );
 238          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 239       }
 240    }
 241 }
 242
 243
 244 /**
 245  * Called via the GL API dispatcher.
 246  */
 247 void
 248 _tnl_DrawRangeElements(GLenum mode,
 249                        GLuint start, GLuint end,
 250                        GLsizei count, GLenum type, const GLvoid *indices)
 251 {
 252    GET_CURRENT_CONTEXT(ctx);
 253    GLuint *ui_indices;
 254
 255    if (MESA_VERBOSE & VERBOSE_API)
 256       _mesa_debug(NULL, "_tnl_DrawRangeElements %d %d %d\n", start, end, count);
 257
 258    /* Check arguments, etc.
 259     */
 260    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
 261                                           type, indices ))
 262       return;
 263
 264    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 265                                                count, type, indices );
 266
 267
 268    if (ctx->CompileFlag) {
 269       /* Can't do anything when compiling:
 270        */
 271       fallback_drawelements( ctx, mode, count, ui_indices );
 272    }
 273    else if (ctx->Array.LockCount) {
 274       /* Are the arrays already locked?  If so we currently have to look
 275        * at the whole locked range.
 276        */
 277       if (start >= ctx->Array.LockFirst && end <= ctx->Array.LockCount)
 278          _tnl_draw_range_elements( ctx, mode,
 279                                    ctx->Array.LockFirst,
 280                                    ctx->Array.LockCount,
 281                                    count, ui_indices );
 282       else {
 283          /* The spec says referencing elements outside the locked
 284           * range is undefined.  I'm going to make it a noop this time
 285           * round, maybe come up with something beter before 3.6.
 286           *
 287           * May be able to get away with just setting LockCount==0,
 288           * though this raises the problems of dependent state.  May
 289           * have to call glUnlockArrays() directly?
 290           *
 291           * Or scan the list and replace bad indices?
 292           */
 293          _mesa_problem( ctx,
 294                      "DrawRangeElements references "
 295                      "elements outside locked range.");
 296       }
 297    }
 298    else if (end + 1 - start < ctx->Const.MaxArrayLockSize) {
 299       /* The arrays aren't locked but we can still fit them inside a
 300        * single vertexbuffer.
 301        */
 302       _tnl_draw_range_elements( ctx, mode, start, end + 1, count, ui_indices );
 303    } else {
 304       /* Range is too big to optimize:
 305        */
 306       fallback_drawelements( ctx, mode, count, ui_indices );
 307    }
 308 }
 309
 310
 311
 312 /**
 313  * Called via the GL API dispatcher.
 314  */
 315 void
 316 _tnl_DrawElements(GLenum mode, GLsizei count, GLenum type,
 317                   const GLvoid *indices)
 318 {
 319    GET_CURRENT_CONTEXT(ctx);
 320    GLuint *ui_indices;
 321
 322    if (MESA_VERBOSE & VERBOSE_API)
 323       _mesa_debug(NULL, "_tnl_DrawElements %d\n", count);
 324
 325    /* Check arguments, etc.
 326     */
 327    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 328       return;
 329
 330    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 331                                                count, type, indices );
 332
 333    if (ctx->CompileFlag) {
 334       /* Can't do anything when compiling:
 335        */
 336       fallback_drawelements( ctx, mode, count, ui_indices );
 337    }
 338    else if (ctx->Array.LockCount) {
 339       _tnl_draw_range_elements( ctx, mode,
 340                                 ctx->Array.LockFirst,
 341                                 ctx->Array.LockCount,
 342                                 count, ui_indices );
 343    }
 344    else {
 345       /* Scan the index list and see if we can use the locked path anyway.
 346        */
 347       GLuint max_elt = 0;
 348       GLint i;
 349
 350       for (i = 0 ; i < count ; i++)
 351          if (ui_indices[i] > max_elt)
 352             max_elt = ui_indices[i];
 353
 354       if (max_elt < ctx->Const.MaxArrayLockSize && /* can we use it? */
 355           max_elt < (GLuint) count)                /* do we want to use it? */
 356          _tnl_draw_range_elements( ctx, mode, 0, max_elt+1, count, ui_indices );
 357       else
 358          fallback_drawelements( ctx, mode, count, ui_indices );
 359    }
 360 }
 361
 362
 363 /**
 364  * Initialize context's vertex array fields.  Called during T 'n L context
 365  * creation.
 366  */
 367 void _tnl_array_init( GLcontext *ctx )
 368 {
 369    TNLcontext *tnl = TNL_CONTEXT(ctx);
 370    struct vertex_arrays *tmp = &tnl->array_inputs;
 371    GLvertexformat *vfmt = &(TNL_CONTEXT(ctx)->vtxfmt);
 372    GLuint i;
 373
 374    vfmt->DrawArrays = _tnl_DrawArrays;
 375    vfmt->DrawElements = _tnl_DrawElements;
 376    vfmt->DrawRangeElements = _tnl_DrawRangeElements;
 377
 378    /* Setup vector pointers that will be used to bind arrays to VB's.
 379     */
 380    _mesa_vector4f_init( &tmp->Obj, 0, 0 );
 381    _mesa_vector4f_init( &tmp->Normal, 0, 0 );
 382    _mesa_vector4f_init( &tmp->FogCoord, 0, 0 );
 383    _mesa_vector1ui_init( &tmp->Index, 0, 0 );
 384    _mesa_vector1ub_init( &tmp->EdgeFlag, 0, 0 );
 385
 386    for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
 387       _mesa_vector4f_init( &tmp->TexCoord[i], 0, 0);
 388
 389    tnl->tmp_primitive = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 390    tnl->tmp_primitive_length = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 391 }
 392
 393
 394 /**
 395  * Destroy the context's vertex array stuff.
 396  * Called during T 'n L context destruction.
 397  */
 398 void _tnl_array_destroy( GLcontext *ctx )
 399 {
 400    TNLcontext *tnl = TNL_CONTEXT(ctx);
 401    if (tnl->tmp_primitive_length) FREE(tnl->tmp_primitive_length);
 402    if (tnl->tmp_primitive) FREE(tnl->tmp_primitive);
 403 }