src/mesa/tnl/t_array_api.c

   1 /* $Id: t_array_api.c,v 1.19 2001/09/14 17:00:42 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    if (_tnl_hard_begin( ctx, mode )) {
  52       GLint i;
  53       for (i = start; i < count; i++) {
  54          _tnl_array_element( ctx, i );
  55       }
  56       _tnl_end( ctx );
  57    }
  58 }
  59
  60
  61 static void fallback_drawelements( GLcontext *ctx, GLenum mode, GLsizei count,
  62                                    const GLuint *indices)
  63 {
  64    /* Simple version of the above code.
  65     */
  66    if (_tnl_hard_begin(ctx, mode)) {
  67       GLint i;
  68       for (i = 0 ; i < count ; i++)
  69          _tnl_array_element( ctx, indices[i] );
  70       _tnl_end( ctx );
  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    _tnl_vb_bind_arrays( ctx, start, end );
  84
  85    tnl->vb.FirstPrimitive = 0;
  86    tnl->vb.Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
  87    tnl->vb.PrimitiveLength[0] = count;
  88    tnl->vb.Elts = (GLuint *)indices;
  89
  90    if (ctx->Array.LockCount)
  91       tnl->Driver.RunPipeline( ctx );
  92    else {
  93       /* Note that arrays may have changed before/after execution.
  94        */
  95       tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
  96       tnl->Driver.RunPipeline( ctx );
  97       tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
  98    }
  99 }
 100
 101
 102
 103
 104 void
 105 _tnl_DrawArrays(GLenum mode, GLint start, GLsizei count)
 106 {
 107    GET_CURRENT_CONTEXT(ctx);
 108    TNLcontext *tnl = TNL_CONTEXT(ctx);
 109    struct vertex_buffer *VB = &tnl->vb;
 110
 111 /*     fprintf(stderr, "%s %d %d\n", __FUNCTION__, start, count); */
 112
 113    /* Check arguments, etc.
 114     */
 115    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 116       return;
 117
 118    if (tnl->pipeline.build_state_changes)
 119       _tnl_validate_pipeline( ctx );
 120
 121    if (ctx->CompileFlag) {
 122       fallback_drawarrays( ctx, mode, start, start + count );
 123    }
 124    else if (count < (GLint) ctx->Const.MaxArrayLockSize) {
 125
 126       /* Small primitives which can fit in a single vertex buffer:
 127        */
 128       FLUSH_CURRENT( ctx, 0 );
 129
 130       if (ctx->Array.LockCount)
 131       {
 132          if (start < (GLint) ctx->Array.LockFirst)
 133             start = ctx->Array.LockFirst;
 134          if (start + count > (GLint) ctx->Array.LockCount)
 135             count = ctx->Array.LockCount - start;
 136          if (start >= count)
 137             return;
 138
 139          /* Locked drawarrays.  Reuse any previously transformed data.
 140           */
 141          _tnl_vb_bind_arrays( ctx, ctx->Array.LockFirst, ctx->Array.LockCount );
 142          VB->FirstPrimitive = start;
 143          VB->Primitive[start] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 144          VB->PrimitiveLength[start] = count;
 145          tnl->Driver.RunPipeline( ctx );
 146       } else {
 147          /* The arrays are small enough to fit in a single VB; just bind
 148           * them and go.  Any untransformed data will be copied on
 149           * clipping.
 150           *
 151           * Invalidate any cached data dependent on these arrays.
 152           */
 153          _tnl_vb_bind_arrays( ctx, start, start + count );
 154          VB->FirstPrimitive = 0;
 155          VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 156          VB->PrimitiveLength[0] = count;
 157          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 158          tnl->Driver.RunPipeline( ctx );
 159          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 160       }
 161    }
 162    else {
 163       int bufsz = (ctx->Const.MaxArrayLockSize - 4) & ~3;
 164       int j, nr;
 165       int minimum, modulo, skip;
 166
 167       /* Large primitives requiring decomposition to multiple vertex
 168        * buffers:
 169        */
 170       switch (mode) {
 171       case GL_POINTS:
 172          minimum = 0;
 173          modulo = 1;
 174          skip = 0;
 175       case GL_LINES:
 176          minimum = 1;
 177          modulo = 2;
 178          skip = 1;
 179       case GL_LINE_STRIP:
 180          minimum = 1;
 181          modulo = 1;
 182          skip = 0;
 183          break;
 184       case GL_TRIANGLES:
 185          minimum = 2;
 186          modulo = 3;
 187          skip = 2;
 188          break;
 189       case GL_TRIANGLE_STRIP:
 190          minimum = 2;
 191          modulo = 1;
 192          skip = 0;
 193          break;
 194       case GL_QUADS:
 195          minimum = 3;
 196          modulo = 4;
 197          skip = 3;
 198          break;
 199       case GL_QUAD_STRIP:
 200          minimum = 3;
 201          modulo = 2;
 202          skip = 0;
 203          break;
 204       case GL_LINE_LOOP:
 205       case GL_TRIANGLE_FAN:
 206       case GL_POLYGON:
 207       default:
 208          /* Primitives requiring a copied vertex (fan-like primitives)
 209           * must use the slow path:
 210           */
 211          fallback_drawarrays( ctx, mode, start, start + count );
 212          return;
 213       }
 214
 215       FLUSH_CURRENT( ctx, 0 );
 216
 217 /*        fprintf(stderr, "start %d count %d min %d modulo %d skip %d\n", */
 218 /*            start, count, minimum, modulo, skip); */
 219
 220
 221       bufsz -= bufsz % modulo;
 222       bufsz -= minimum;
 223       count += start;
 224
 225       for (j = start + minimum ; j < count ; j += nr + skip ) {
 226
 227          nr = MIN2( bufsz, count - j );
 228
 229 /*       fprintf(stderr, "%d..%d\n", j - minimum, j+nr); */
 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 void
 245 _tnl_DrawRangeElements(GLenum mode,
 246                        GLuint start, GLuint end,
 247                        GLsizei count, GLenum type, const GLvoid *indices)
 248 {
 249    GET_CURRENT_CONTEXT(ctx);
 250    TNLcontext *tnl = TNL_CONTEXT(ctx);
 251    GLuint *ui_indices;
 252
 253 /*     fprintf(stderr, "%s\n", __FUNCTION__); */
 254
 255    /* Check arguments, etc.
 256     */
 257    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
 258                                           type, indices ))
 259       return;
 260
 261    if (tnl->pipeline.build_state_changes)
 262       _tnl_validate_pipeline( ctx );
 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 void
 313 _tnl_DrawElements(GLenum mode, GLsizei count, GLenum type,
 314                   const GLvoid *indices)
 315 {
 316    GET_CURRENT_CONTEXT(ctx);
 317    TNLcontext *tnl = TNL_CONTEXT(ctx);
 318    GLuint *ui_indices;
 319
 320 /*     fprintf(stderr, "%s\n", __FUNCTION__); */
 321
 322    /* Check arguments, etc.
 323     */
 324    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 325       return;
 326
 327    if (tnl->pipeline.build_state_changes)
 328       _tnl_validate_pipeline( ctx );
 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 void _tnl_array_init( GLcontext *ctx )
 364 {
 365    TNLcontext *tnl = TNL_CONTEXT(ctx);
 366    struct vertex_arrays *tmp = &tnl->array_inputs;
 367    GLvertexformat *vfmt = &(TNL_CONTEXT(ctx)->vtxfmt);
 368    GLuint i;
 369
 370    vfmt->DrawArrays = _tnl_DrawArrays;
 371    vfmt->DrawElements = _tnl_DrawElements;
 372    vfmt->DrawRangeElements = _tnl_DrawRangeElements;
 373
 374    /* Setup vector pointers that will be used to bind arrays to VB's.
 375     */
 376    _mesa_vector4f_init( &tmp->Obj, 0, 0 );
 377    _mesa_vector3f_init( &tmp->Normal, 0, 0 );
 378    _mesa_vector1f_init( &tmp->FogCoord, 0, 0 );
 379    _mesa_vector1ui_init( &tmp->Index, 0, 0 );
 380    _mesa_vector1ub_init( &tmp->EdgeFlag, 0, 0 );
 381
 382    for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
 383       _mesa_vector4f_init( &tmp->TexCoord[i], 0, 0);
 384
 385    tnl->tmp_primitive = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 386    tnl->tmp_primitive_length = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 387 }
 388
 389
 390 void _tnl_array_destroy( GLcontext *ctx )
 391 {
 392    TNLcontext *tnl = TNL_CONTEXT(ctx);
 393    if (tnl->tmp_primitive_length) FREE(tnl->tmp_primitive_length);
 394    if (tnl->tmp_primitive) FREE(tnl->tmp_primitive);
 395 }