src/mesa/tnl/t_array_api.c

   1 /* $Id: t_array_api.c,v 1.23 2002/01/05 20:51:12 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 (ctx->Array.LockCount &&
 125             count < (GLint) ctx->Const.MaxArrayLockSize) {
 126
 127       /* Small primitives which can fit in a single vertex buffer:
 128        */
 129       FLUSH_CURRENT( ctx, 0 );
 130
 131       if (start < (GLint) ctx->Array.LockFirst)
 132          start = ctx->Array.LockFirst;
 133       if (start + count > (GLint) ctx->Array.LockCount)
 134          count = ctx->Array.LockCount - start;
 135
 136       /* Locked drawarrays.  Reuse any previously transformed data.
 137        */
 138       _tnl_vb_bind_arrays( ctx, ctx->Array.LockFirst, ctx->Array.LockCount );
 139       VB->FirstPrimitive = start;
 140       VB->Primitive[start] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 141       VB->PrimitiveLength[start] = count;
 142       tnl->Driver.RunPipeline( ctx );
 143    }
 144    else {
 145       int bufsz = 256;          /* Use a small buffer for cache goodness */
 146       int j, nr;
 147       int minimum, modulo, skip;
 148
 149       /* Large primitives requiring decomposition to multiple vertex
 150        * buffers:
 151        */
 152       switch (mode) {
 153       case GL_POINTS:
 154          minimum = 0;
 155          modulo = 1;
 156          skip = 0;
 157       case GL_LINES:
 158          minimum = 1;
 159          modulo = 2;
 160          skip = 1;
 161       case GL_LINE_STRIP:
 162          minimum = 1;
 163          modulo = 1;
 164          skip = 0;
 165          break;
 166       case GL_TRIANGLES:
 167          minimum = 2;
 168          modulo = 3;
 169          skip = 2;
 170          break;
 171       case GL_TRIANGLE_STRIP:
 172          minimum = 2;
 173          modulo = 1;
 174          skip = 0;
 175          break;
 176       case GL_QUADS:
 177          minimum = 3;
 178          modulo = 4;
 179          skip = 3;
 180          break;
 181       case GL_QUAD_STRIP:
 182          minimum = 3;
 183          modulo = 2;
 184          skip = 0;
 185          break;
 186       case GL_LINE_LOOP:
 187       case GL_TRIANGLE_FAN:
 188       case GL_POLYGON:
 189       default:
 190          /* Primitives requiring a copied vertex (fan-like primitives)
 191           * must use the slow path if they cannot fit in a single
 192           * vertex buffer.
 193           */
 194          if (count < (GLint) ctx->Const.MaxArrayLockSize) {
 195             bufsz = ctx->Const.MaxArrayLockSize;
 196             minimum = 0;
 197             modulo = 1;
 198             skip = 0;
 199          }
 200          else {
 201             fallback_drawarrays( ctx, mode, start, start + count );
 202             return;
 203          }
 204       }
 205
 206       FLUSH_CURRENT( ctx, 0 );
 207
 208 /*        fprintf(stderr, "start %d count %d min %d modulo %d skip %d\n", */
 209 /*            start, count, minimum, modulo, skip); */
 210
 211
 212       bufsz -= bufsz % modulo;
 213       bufsz -= minimum;
 214       count += start;
 215
 216       for (j = start + minimum ; j < count ; j += nr + skip ) {
 217
 218          nr = MIN2( bufsz, count - j );
 219
 220 /*       fprintf(stderr, "%d..%d\n", j - minimum, j+nr); */
 221
 222          _tnl_vb_bind_arrays( ctx, j - minimum, j + nr );
 223
 224          VB->FirstPrimitive = 0;
 225          VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
 226          VB->PrimitiveLength[0] = nr + minimum;
 227          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 228          tnl->Driver.RunPipeline( ctx );
 229          tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
 230       }
 231    }
 232 }
 233
 234
 235 void
 236 _tnl_DrawRangeElements(GLenum mode,
 237                        GLuint start, GLuint end,
 238                        GLsizei count, GLenum type, const GLvoid *indices)
 239 {
 240    GET_CURRENT_CONTEXT(ctx);
 241    TNLcontext *tnl = TNL_CONTEXT(ctx);
 242    GLuint *ui_indices;
 243
 244 /*     fprintf(stderr, "%s\n", __FUNCTION__); */
 245
 246    /* Check arguments, etc.
 247     */
 248    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
 249                                           type, indices ))
 250       return;
 251
 252    if (tnl->pipeline.build_state_changes)
 253       _tnl_validate_pipeline( ctx );
 254
 255    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 256                                                count, type, indices );
 257
 258
 259    if (ctx->CompileFlag) {
 260       /* Can't do anything when compiling:
 261        */
 262       fallback_drawelements( ctx, mode, count, ui_indices );
 263    }
 264    else if (ctx->Array.LockCount) {
 265       /* Are the arrays already locked?  If so we currently have to look
 266        * at the whole locked range.
 267        */
 268       if (start >= ctx->Array.LockFirst && end <= ctx->Array.LockCount)
 269          _tnl_draw_range_elements( ctx, mode,
 270                                    ctx->Array.LockFirst,
 271                                    ctx->Array.LockCount,
 272                                    count, ui_indices );
 273       else {
 274          /* The spec says referencing elements outside the locked
 275           * range is undefined.  I'm going to make it a noop this time
 276           * round, maybe come up with something beter before 3.6.
 277           *
 278           * May be able to get away with just setting LockCount==0,
 279           * though this raises the problems of dependent state.  May
 280           * have to call glUnlockArrays() directly?
 281           *
 282           * Or scan the list and replace bad indices?
 283           */
 284          _mesa_problem( ctx,
 285                      "DrawRangeElements references "
 286                      "elements outside locked range.");
 287       }
 288    }
 289    else if (end + 1 - start < ctx->Const.MaxArrayLockSize) {
 290       /* The arrays aren't locked but we can still fit them inside a
 291        * single vertexbuffer.
 292        */
 293       _tnl_draw_range_elements( ctx, mode, start, end + 1, count, ui_indices );
 294    } else {
 295       /* Range is too big to optimize:
 296        */
 297       fallback_drawelements( ctx, mode, count, ui_indices );
 298    }
 299 }
 300
 301
 302
 303 void
 304 _tnl_DrawElements(GLenum mode, GLsizei count, GLenum type,
 305                   const GLvoid *indices)
 306 {
 307    GET_CURRENT_CONTEXT(ctx);
 308    TNLcontext *tnl = TNL_CONTEXT(ctx);
 309    GLuint *ui_indices;
 310
 311 /*     fprintf(stderr, "%s\n", __FUNCTION__); */
 312
 313    /* Check arguments, etc.
 314     */
 315    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 316       return;
 317
 318    if (tnl->pipeline.build_state_changes)
 319       _tnl_validate_pipeline( ctx );
 320
 321    ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
 322                                                count, type, indices );
 323
 324    if (ctx->CompileFlag) {
 325       /* Can't do anything when compiling:
 326        */
 327       fallback_drawelements( ctx, mode, count, ui_indices );
 328    }
 329    else if (ctx->Array.LockCount) {
 330       _tnl_draw_range_elements( ctx, mode,
 331                                 ctx->Array.LockFirst,
 332                                 ctx->Array.LockCount,
 333                                 count, ui_indices );
 334    }
 335    else {
 336       /* Scan the index list and see if we can use the locked path anyway.
 337        */
 338       GLuint max_elt = 0;
 339       GLint i;
 340
 341       for (i = 0 ; i < count ; i++)
 342          if (ui_indices[i] > max_elt)
 343             max_elt = ui_indices[i];
 344
 345       if (max_elt < ctx->Const.MaxArrayLockSize && /* can we use it? */
 346           max_elt < (GLuint) count)                /* do we want to use it? */
 347          _tnl_draw_range_elements( ctx, mode, 0, max_elt+1, count, ui_indices );
 348       else
 349          fallback_drawelements( ctx, mode, count, ui_indices );
 350    }
 351 }
 352
 353
 354 void _tnl_array_init( GLcontext *ctx )
 355 {
 356    TNLcontext *tnl = TNL_CONTEXT(ctx);
 357    struct vertex_arrays *tmp = &tnl->array_inputs;
 358    GLvertexformat *vfmt = &(TNL_CONTEXT(ctx)->vtxfmt);
 359    GLuint i;
 360
 361    vfmt->DrawArrays = _tnl_DrawArrays;
 362    vfmt->DrawElements = _tnl_DrawElements;
 363    vfmt->DrawRangeElements = _tnl_DrawRangeElements;
 364
 365    /* Setup vector pointers that will be used to bind arrays to VB's.
 366     */
 367    _mesa_vector4f_init( &tmp->Obj, 0, 0 );
 368    _mesa_vector4f_init( &tmp->Normal, 0, 0 );
 369    _mesa_vector4f_init( &tmp->FogCoord, 0, 0 );
 370    _mesa_vector1ui_init( &tmp->Index, 0, 0 );
 371    _mesa_vector1ub_init( &tmp->EdgeFlag, 0, 0 );
 372
 373    for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
 374       _mesa_vector4f_init( &tmp->TexCoord[i], 0, 0);
 375
 376    tnl->tmp_primitive = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 377    tnl->tmp_primitive_length = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
 378 }
 379
 380
 381 void _tnl_array_destroy( GLcontext *ctx )
 382 {
 383    TNLcontext *tnl = TNL_CONTEXT(ctx);
 384    if (tnl->tmp_primitive_length) FREE(tnl->tmp_primitive_length);
 385    if (tnl->tmp_primitive) FREE(tnl->tmp_primitive);
 386 }