src/mesa/vbo/vbo_exec_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.2
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28 #include "main/glheader.h"
  29 #include "main/bufferobj.h"
  30 #include "main/compiler.h"
  31 #include "main/enums.h"
  32 #include "main/state.h"
  33
  34 #include "vbo_context.h"
  35
  36
  37 #if FEATURE_beginend
  38
  39
  40 static void
  41 vbo_exec_debug_verts( struct vbo_exec_context *exec )
  42 {
  43    GLuint count = exec->vtx.vert_count;
  44    GLuint i;
  45
  46    printf("%s: %u vertices %d primitives, %d vertsize\n",
  47           __FUNCTION__,
  48           count,
  49           exec->vtx.prim_count,
  50           exec->vtx.vertex_size);
  51
  52    for (i = 0 ; i < exec->vtx.prim_count ; i++) {
  53       struct _mesa_prim *prim = &exec->vtx.prim[i];
  54       printf("   prim %d: %s%s %d..%d %s %s\n",
  55              i,
  56              _mesa_lookup_prim_by_nr(prim->mode),
  57              prim->weak ? " (weak)" : "",
  58              prim->start,
  59              prim->start + prim->count,
  60              prim->begin ? "BEGIN" : "(wrap)",
  61              prim->end ? "END" : "(wrap)");
  62    }
  63 }
  64
  65
  66 /*
  67  * NOTE: Need to have calculated primitives by this point -- do it on the fly.
  68  * NOTE: Old 'parity' issue is gone.
  69  */
  70 static GLuint
  71 vbo_copy_vertices( struct vbo_exec_context *exec )
  72 {
  73    GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
  74    GLuint ovf, i;
  75    GLuint sz = exec->vtx.vertex_size;
  76    GLfloat *dst = exec->vtx.copied.buffer;
  77    const GLfloat *src = (exec->vtx.buffer_map +
  78                          exec->vtx.prim[exec->vtx.prim_count-1].start *
  79                          exec->vtx.vertex_size);
  80
  81
  82    switch (exec->ctx->Driver.CurrentExecPrimitive) {
  83    case GL_POINTS:
  84       return 0;
  85    case GL_LINES:
  86       ovf = nr&1;
  87       for (i = 0 ; i < ovf ; i++)
  88          memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  89       return i;
  90    case GL_TRIANGLES:
  91       ovf = nr%3;
  92       for (i = 0 ; i < ovf ; i++)
  93          memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  94       return i;
  95    case GL_QUADS:
  96       ovf = nr&3;
  97       for (i = 0 ; i < ovf ; i++)
  98          memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  99       return i;
 100    case GL_LINE_STRIP:
 101       if (nr == 0) {
 102          return 0;
 103       }
 104       else {
 105          memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 106          return 1;
 107       }
 108    case GL_LINE_LOOP:
 109    case GL_TRIANGLE_FAN:
 110    case GL_POLYGON:
 111       if (nr == 0) {
 112          return 0;
 113       }
 114       else if (nr == 1) {
 115          memcpy( dst, src+0, sz * sizeof(GLfloat) );
 116          return 1;
 117       }
 118       else {
 119          memcpy( dst, src+0, sz * sizeof(GLfloat) );
 120          memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 121          return 2;
 122       }
 123    case GL_TRIANGLE_STRIP:
 124       /* no parity issue, but need to make sure the tri is not drawn twice */
 125       if (nr & 1) {
 126          exec->vtx.prim[exec->vtx.prim_count-1].count--;
 127       }
 128       /* fallthrough */
 129    case GL_QUAD_STRIP:
 130       switch (nr) {
 131       case 0:
 132          ovf = 0;
 133          break;
 134       case 1:
 135          ovf = 1;
 136          break;
 137       default:
 138          ovf = 2 + (nr & 1);
 139          break;
 140       }
 141       for (i = 0 ; i < ovf ; i++)
 142          memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
 143       return i;
 144    case PRIM_OUTSIDE_BEGIN_END:
 145       return 0;
 146    default:
 147       assert(0);
 148       return 0;
 149    }
 150 }
 151
 152
 153
 154 /* TODO: populate these as the vertex is defined:
 155  */
 156 static void
 157 vbo_exec_bind_arrays( struct gl_context *ctx )
 158 {
 159    struct vbo_context *vbo = vbo_context(ctx);
 160    struct vbo_exec_context *exec = &vbo->exec;
 161    struct gl_client_array *arrays = exec->vtx.arrays;
 162    const GLuint count = exec->vtx.vert_count;
 163    const GLuint *map;
 164    GLuint attr;
 165    GLbitfield varying_inputs = 0x0;
 166
 167    /* Install the default (ie Current) attributes first, then overlay
 168     * all active ones.
 169     */
 170    switch (get_program_mode(exec->ctx)) {
 171    case VP_NONE:
 172       for (attr = 0; attr < 16; attr++) {
 173          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 174       }
 175       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 176          ASSERT(attr + 16 < Elements(exec->vtx.inputs));
 177          exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
 178       }
 179       map = vbo->map_vp_none;
 180       break;
 181    case VP_NV:
 182    case VP_ARB:
 183       /* The aliasing of attributes for NV vertex programs has already
 184        * occurred.  NV vertex programs cannot access material values,
 185        * nor attributes greater than VERT_ATTRIB_TEX7.
 186        */
 187       for (attr = 0; attr < 16; attr++) {
 188          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 189          ASSERT(attr + 16 < Elements(exec->vtx.inputs));
 190          exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
 191       }
 192       map = vbo->map_vp_arb;
 193
 194       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 195        * In that case we effectively need to route the data from
 196        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 197        */
 198       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 199           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 200          exec->vtx.inputs[16] = exec->vtx.inputs[0];
 201          exec->vtx.attrsz[16] = exec->vtx.attrsz[0];
 202          exec->vtx.attrptr[16] = exec->vtx.attrptr[0];
 203          exec->vtx.attrsz[0] = 0;
 204       }
 205       break;
 206    default:
 207       assert(0);
 208    }
 209
 210    /* Make all active attributes (including edgeflag) available as
 211     * arrays of floats.
 212     */
 213    for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
 214       const GLuint src = map[attr];
 215
 216       if (exec->vtx.attrsz[src]) {
 217          GLsizeiptr offset = (GLbyte *)exec->vtx.attrptr[src] -
 218             (GLbyte *)exec->vtx.vertex;
 219
 220          /* override the default array set above */
 221          ASSERT(attr < Elements(exec->vtx.inputs));
 222          ASSERT(attr < Elements(exec->vtx.arrays)); /* arrays[] */
 223          exec->vtx.inputs[attr] = &arrays[attr];
 224
 225          if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 226             /* a real buffer obj: Ptr is an offset, not a pointer*/
 227             assert(exec->vtx.bufferobj->Pointer);  /* buf should be mapped */
 228             assert(offset >= 0);
 229             arrays[attr].Ptr = (GLubyte *)exec->vtx.bufferobj->Offset + offset;
 230          }
 231          else {
 232             /* Ptr into ordinary app memory */
 233             arrays[attr].Ptr = (GLubyte *)exec->vtx.buffer_map + offset;
 234          }
 235          arrays[attr].Size = exec->vtx.attrsz[src];
 236          arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
 237          arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
 238          arrays[attr].Type = GL_FLOAT;
 239          arrays[attr].Format = GL_RGBA;
 240          arrays[attr].Enabled = 1;
 241          _mesa_reference_buffer_object(ctx,
 242                                        &arrays[attr].BufferObj,
 243                                        exec->vtx.bufferobj);
 244          arrays[attr]._MaxElement = count; /* ??? */
 245
 246          varying_inputs |= 1 << attr;
 247       }
 248    }
 249
 250    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 251 }
 252
 253
 254 static void
 255 vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
 256 {
 257    GLenum target = GL_ARRAY_BUFFER_ARB;
 258
 259    if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 260       struct gl_context *ctx = exec->ctx;
 261
 262       if (ctx->Driver.FlushMappedBufferRange) {
 263          GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
 264          GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
 265
 266          if (length)
 267             ctx->Driver.FlushMappedBufferRange(ctx, target,
 268                                                offset, length,
 269                                                exec->vtx.bufferobj);
 270       }
 271
 272       exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
 273                                 exec->vtx.buffer_map) * sizeof(float);
 274
 275       assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
 276       assert(exec->vtx.buffer_ptr != NULL);
 277
 278       ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
 279       exec->vtx.buffer_map = NULL;
 280       exec->vtx.buffer_ptr = NULL;
 281       exec->vtx.max_vert = 0;
 282    }
 283 }
 284
 285
 286 void
 287 vbo_exec_vtx_map( struct vbo_exec_context *exec )
 288 {
 289    struct gl_context *ctx = exec->ctx;
 290    const GLenum target = GL_ARRAY_BUFFER_ARB;
 291    const GLenum access = GL_READ_WRITE_ARB; /* for MapBuffer */
 292    const GLenum accessRange = GL_MAP_WRITE_BIT |  /* for MapBufferRange */
 293                               GL_MAP_INVALIDATE_RANGE_BIT |
 294                               GL_MAP_UNSYNCHRONIZED_BIT |
 295                               GL_MAP_FLUSH_EXPLICIT_BIT |
 296                               MESA_MAP_NOWAIT_BIT;
 297    const GLenum usage = GL_STREAM_DRAW_ARB;
 298
 299    if (!_mesa_is_bufferobj(exec->vtx.bufferobj))
 300       return;
 301
 302    if (exec->vtx.buffer_map != NULL) {
 303       assert(0);
 304       exec->vtx.buffer_map = NULL;
 305       exec->vtx.buffer_ptr = NULL;
 306    }
 307
 308    if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024 &&
 309        ctx->Driver.MapBufferRange) {
 310       exec->vtx.buffer_map =
 311          (GLfloat *)ctx->Driver.MapBufferRange(ctx,
 312                                                target,
 313                                                exec->vtx.buffer_used,
 314                                                (VBO_VERT_BUFFER_SIZE -
 315                                                 exec->vtx.buffer_used),
 316                                                accessRange,
 317                                                exec->vtx.bufferobj);
 318       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 319    }
 320
 321    if (!exec->vtx.buffer_map) {
 322       exec->vtx.buffer_used = 0;
 323
 324       ctx->Driver.BufferData(ctx, target,
 325                              VBO_VERT_BUFFER_SIZE,
 326                              NULL, usage, exec->vtx.bufferobj);
 327
 328
 329       if (ctx->Driver.MapBufferRange)
 330          exec->vtx.buffer_map =
 331             (GLfloat *)ctx->Driver.MapBufferRange(ctx, target,
 332                                                   0, VBO_VERT_BUFFER_SIZE,
 333                                                   accessRange,
 334                                                   exec->vtx.bufferobj);
 335       if (!exec->vtx.buffer_map)
 336          exec->vtx.buffer_map =
 337             (GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
 338       assert(exec->vtx.buffer_map);
 339       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 340    }
 341
 342    if (0)
 343       printf("map %d..\n", exec->vtx.buffer_used);
 344 }
 345
 346
 347
 348 /**
 349  * Execute the buffer and save copied verts.
 350  */
 351 void
 352 vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
 353 {
 354    if (0)
 355       vbo_exec_debug_verts( exec );
 356
 357    if (exec->vtx.prim_count &&
 358        exec->vtx.vert_count) {
 359
 360       exec->vtx.copied.nr = vbo_copy_vertices( exec );
 361
 362       if (exec->vtx.copied.nr != exec->vtx.vert_count) {
 363          struct gl_context *ctx = exec->ctx;
 364
 365          /* Before the update_state() as this may raise _NEW_ARRAY
 366           * from _mesa_set_varying_vp_inputs().
 367           */
 368          vbo_exec_bind_arrays( ctx );
 369
 370          if (ctx->NewState)
 371             _mesa_update_state( ctx );
 372
 373          if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 374             vbo_exec_vtx_unmap( exec );
 375          }
 376
 377          if (0)
 378             printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
 379                    exec->vtx.vert_count);
 380
 381          vbo_context(ctx)->draw_prims( ctx,
 382                                        exec->vtx.inputs,
 383                                        exec->vtx.prim,
 384                                        exec->vtx.prim_count,
 385                                        NULL,
 386                                        GL_TRUE,
 387                                        0,
 388                                        exec->vtx.vert_count - 1);
 389
 390          /* If using a real VBO, get new storage -- unless asked not to.
 391           */
 392          if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !unmap) {
 393             vbo_exec_vtx_map( exec );
 394          }
 395       }
 396    }
 397
 398    /* May have to unmap explicitly if we didn't draw:
 399     */
 400    if (unmap &&
 401        _mesa_is_bufferobj(exec->vtx.bufferobj) &&
 402        exec->vtx.buffer_map) {
 403       vbo_exec_vtx_unmap( exec );
 404    }
 405
 406
 407    if (unmap || exec->vtx.vertex_size == 0)
 408       exec->vtx.max_vert = 0;
 409    else
 410       exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 411                             (exec->vtx.vertex_size * sizeof(GLfloat)));
 412
 413    exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 414    exec->vtx.prim_count = 0;
 415    exec->vtx.vert_count = 0;
 416 }
 417
 418
 419 #endif /* FEATURE_beginend */