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/context.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( GLcontext *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 GLubyte *data = (GLubyte *) exec->vtx.buffer_map;
 164    const GLuint *map;
 165    GLuint attr;
 166    GLbitfield varying_inputs = 0x0;
 167
 168    /* Install the default (ie Current) attributes first, then overlay
 169     * all active ones.
 170     */
 171    switch (get_program_mode(exec->ctx)) {
 172    case VP_NONE:
 173       for (attr = 0; attr < 16; attr++) {
 174          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 175       }
 176       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 177          ASSERT(attr + 16 < Elements(exec->vtx.inputs));
 178          exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
 179       }
 180       map = vbo->map_vp_none;
 181       break;
 182    case VP_NV:
 183    case VP_ARB:
 184       /* The aliasing of attributes for NV vertex programs has already
 185        * occurred.  NV vertex programs cannot access material values,
 186        * nor attributes greater than VERT_ATTRIB_TEX7.
 187        */
 188       for (attr = 0; attr < 16; attr++) {
 189          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 190          ASSERT(attr + 16 < Elements(exec->vtx.inputs));
 191          exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
 192       }
 193       map = vbo->map_vp_arb;
 194
 195       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 196        * In that case we effectively need to route the data from
 197        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 198        */
 199       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 200           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 201          exec->vtx.inputs[16] = exec->vtx.inputs[0];
 202          exec->vtx.attrsz[16] = exec->vtx.attrsz[0];
 203          exec->vtx.attrptr[16] = exec->vtx.attrptr[0];
 204          exec->vtx.attrsz[0] = 0;
 205       }
 206       break;
 207    default:
 208       assert(0);
 209    }
 210
 211    /* Make all active attributes (including edgeflag) available as
 212     * arrays of floats.
 213     */
 214    for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
 215       const GLuint src = map[attr];
 216
 217       if (exec->vtx.attrsz[src]) {
 218          /* override the default array set above */
 219          ASSERT(attr < Elements(exec->vtx.inputs));
 220          ASSERT(attr < Elements(exec->vtx.arrays)); /* arrays[] */
 221          exec->vtx.inputs[attr] = &arrays[attr];
 222
 223          if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 224             /* a real buffer obj: Ptr is an offset, not a pointer*/
 225             GLsizeiptr offset;
 226             assert(exec->vtx.bufferobj->Pointer);  /* buf should be mapped */
 227             offset = (GLbyte *) data -
 228                (GLbyte *) exec->vtx.bufferobj->Pointer +
 229                exec->vtx.bufferobj->Offset;
 230             assert(offset >= 0);
 231             arrays[attr].Ptr = (void *) offset;
 232          }
 233          else {
 234             /* Ptr into ordinary app memory */
 235             arrays[attr].Ptr = (void *) data;
 236          }
 237          arrays[attr].Size = exec->vtx.attrsz[src];
 238          arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
 239          arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
 240          arrays[attr].Type = GL_FLOAT;
 241          arrays[attr].Format = GL_RGBA;
 242          arrays[attr].Enabled = 1;
 243          _mesa_reference_buffer_object(ctx,
 244                                        &arrays[attr].BufferObj,
 245                                        exec->vtx.bufferobj);
 246          arrays[attr]._MaxElement = count; /* ??? */
 247
 248          data += exec->vtx.attrsz[src] * sizeof(GLfloat);
 249          varying_inputs |= 1 << attr;
 250       }
 251    }
 252
 253    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 254 }
 255
 256
 257 static void
 258 vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
 259 {
 260    GLenum target = GL_ARRAY_BUFFER_ARB;
 261
 262    if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 263       GLcontext *ctx = exec->ctx;
 264
 265       if (ctx->Driver.FlushMappedBufferRange) {
 266          GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
 267          GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
 268
 269          if (length)
 270             ctx->Driver.FlushMappedBufferRange(ctx, target,
 271                                                offset, length,
 272                                                exec->vtx.bufferobj);
 273       }
 274
 275       exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
 276                                 exec->vtx.buffer_map) * sizeof(float);
 277
 278       assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
 279       assert(exec->vtx.buffer_ptr != NULL);
 280
 281       ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
 282       exec->vtx.buffer_map = NULL;
 283       exec->vtx.buffer_ptr = NULL;
 284       exec->vtx.max_vert = 0;
 285    }
 286 }
 287
 288
 289 void
 290 vbo_exec_vtx_map( struct vbo_exec_context *exec )
 291 {
 292    GLcontext *ctx = exec->ctx;
 293    const GLenum target = GL_ARRAY_BUFFER_ARB;
 294    const GLenum access = GL_READ_WRITE_ARB; /* for MapBuffer */
 295    const GLenum accessRange = GL_MAP_WRITE_BIT |  /* for MapBufferRange */
 296                               GL_MAP_INVALIDATE_RANGE_BIT |
 297                               GL_MAP_UNSYNCHRONIZED_BIT |
 298                               GL_MAP_FLUSH_EXPLICIT_BIT |
 299                               MESA_MAP_NOWAIT_BIT;
 300    const GLenum usage = GL_STREAM_DRAW_ARB;
 301
 302    if (!_mesa_is_bufferobj(exec->vtx.bufferobj))
 303       return;
 304
 305    if (exec->vtx.buffer_map != NULL) {
 306       assert(0);
 307       exec->vtx.buffer_map = NULL;
 308       exec->vtx.buffer_ptr = NULL;
 309    }
 310
 311    if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024 &&
 312        ctx->Driver.MapBufferRange) {
 313       exec->vtx.buffer_map =
 314          (GLfloat *)ctx->Driver.MapBufferRange(ctx,
 315                                                target,
 316                                                exec->vtx.buffer_used,
 317                                                (VBO_VERT_BUFFER_SIZE -
 318                                                 exec->vtx.buffer_used),
 319                                                accessRange,
 320                                                exec->vtx.bufferobj);
 321       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 322    }
 323
 324    if (!exec->vtx.buffer_map) {
 325       exec->vtx.buffer_used = 0;
 326
 327       ctx->Driver.BufferData(ctx, target,
 328                              VBO_VERT_BUFFER_SIZE,
 329                              NULL, usage, exec->vtx.bufferobj);
 330
 331
 332       if (ctx->Driver.MapBufferRange)
 333          exec->vtx.buffer_map =
 334             (GLfloat *)ctx->Driver.MapBufferRange(ctx, target,
 335                                                   0, VBO_VERT_BUFFER_SIZE,
 336                                                   accessRange,
 337                                                   exec->vtx.bufferobj);
 338       if (!exec->vtx.buffer_map)
 339          exec->vtx.buffer_map =
 340             (GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
 341       assert(exec->vtx.buffer_map);
 342       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 343    }
 344
 345    if (0)
 346       printf("map %d..\n", exec->vtx.buffer_used);
 347 }
 348
 349
 350
 351 /**
 352  * Execute the buffer and save copied verts.
 353  */
 354 void
 355 vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
 356 {
 357    if (0)
 358       vbo_exec_debug_verts( exec );
 359
 360    if (exec->vtx.prim_count &&
 361        exec->vtx.vert_count) {
 362
 363       exec->vtx.copied.nr = vbo_copy_vertices( exec );
 364
 365       if (exec->vtx.copied.nr != exec->vtx.vert_count) {
 366          GLcontext *ctx = exec->ctx;
 367
 368          /* Before the update_state() as this may raise _NEW_ARRAY
 369           * from _mesa_set_varying_vp_inputs().
 370           */
 371          vbo_exec_bind_arrays( ctx );
 372
 373          if (ctx->NewState)
 374             _mesa_update_state( ctx );
 375
 376          if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 377             vbo_exec_vtx_unmap( exec );
 378          }
 379
 380          if (0)
 381             printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
 382                    exec->vtx.vert_count);
 383
 384          vbo_context(ctx)->draw_prims( ctx,
 385                                        exec->vtx.inputs,
 386                                        exec->vtx.prim,
 387                                        exec->vtx.prim_count,
 388                                        NULL,
 389                                        GL_TRUE,
 390                                        0,
 391                                        exec->vtx.vert_count - 1);
 392
 393          /* If using a real VBO, get new storage -- unless asked not to.
 394           */
 395          if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !unmap) {
 396             vbo_exec_vtx_map( exec );
 397          }
 398       }
 399    }
 400
 401    /* May have to unmap explicitly if we didn't draw:
 402     */
 403    if (unmap &&
 404        _mesa_is_bufferobj(exec->vtx.bufferobj) &&
 405        exec->vtx.buffer_map) {
 406       vbo_exec_vtx_unmap( exec );
 407    }
 408
 409
 410    if (unmap || exec->vtx.vertex_size == 0)
 411       exec->vtx.max_vert = 0;
 412    else
 413       exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 414                             (exec->vtx.vertex_size * sizeof(GLfloat)));
 415
 416    exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 417    exec->vtx.prim_count = 0;
 418    exec->vtx.vert_count = 0;
 419 }
 420
 421
 422 #endif /* FEATURE_beginend */