src/mesa/vbo/vbo_exec_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keithw@vmware.com>
  26  */
  27
  28 #include <stdio.h>
  29 #include "main/glheader.h"
  30 #include "main/bufferobj.h"
  31 #include "main/compiler.h"
  32 #include "main/context.h"
  33 #include "main/enums.h"
  34 #include "main/state.h"
  35 #include "main/vtxfmt.h"
  36
  37 #include "vbo_context.h"
  38 #include "vbo_noop.h"
  39
  40
  41 static void
  42 vbo_exec_debug_verts( struct vbo_exec_context *exec )
  43 {
  44    GLuint count = exec->vtx.vert_count;
  45    GLuint i;
  46
  47    printf("%s: %u vertices %d primitives, %d vertsize\n",
  48           __FUNCTION__,
  49           count,
  50           exec->vtx.prim_count,
  51           exec->vtx.vertex_size);
  52
  53    for (i = 0 ; i < exec->vtx.prim_count ; i++) {
  54       struct _mesa_prim *prim = &exec->vtx.prim[i];
  55       printf("   prim %d: %s%s %d..%d %s %s\n",
  56              i,
  57              _mesa_lookup_prim_by_nr(prim->mode),
  58              prim->weak ? " (weak)" : "",
  59              prim->start,
  60              prim->start + prim->count,
  61              prim->begin ? "BEGIN" : "(wrap)",
  62              prim->end ? "END" : "(wrap)");
  63    }
  64 }
  65
  66
  67 /*
  68  * NOTE: Need to have calculated primitives by this point -- do it on the fly.
  69  * NOTE: Old 'parity' issue is gone.
  70  */
  71 static GLuint
  72 vbo_copy_vertices( struct vbo_exec_context *exec )
  73 {
  74    GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
  75    GLuint ovf, i;
  76    GLuint sz = exec->vtx.vertex_size;
  77    fi_type *dst = exec->vtx.copied.buffer;
  78    const fi_type *src = (exec->vtx.buffer_map +
  79                          exec->vtx.prim[exec->vtx.prim_count-1].start *
  80                          exec->vtx.vertex_size);
  81
  82
  83    switch (exec->ctx->Driver.CurrentExecPrimitive) {
  84    case GL_POINTS:
  85       return 0;
  86    case GL_LINES:
  87       ovf = nr&1;
  88       for (i = 0 ; i < ovf ; i++)
  89          memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  90       return i;
  91    case GL_TRIANGLES:
  92       ovf = nr%3;
  93       for (i = 0 ; i < ovf ; i++)
  94          memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  95       return i;
  96    case GL_QUADS:
  97       ovf = nr&3;
  98       for (i = 0 ; i < ovf ; i++)
  99          memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
 100       return i;
 101    case GL_LINE_STRIP:
 102       if (nr == 0) {
 103          return 0;
 104       }
 105       else {
 106          memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 107          return 1;
 108       }
 109    case GL_LINE_LOOP:
 110    case GL_TRIANGLE_FAN:
 111    case GL_POLYGON:
 112       if (nr == 0) {
 113          return 0;
 114       }
 115       else if (nr == 1) {
 116          memcpy( dst, src+0, sz * sizeof(GLfloat) );
 117          return 1;
 118       }
 119       else {
 120          memcpy( dst, src+0, sz * sizeof(GLfloat) );
 121          memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 122          return 2;
 123       }
 124    case GL_TRIANGLE_STRIP:
 125       /* no parity issue, but need to make sure the tri is not drawn twice */
 126       if (nr & 1) {
 127          exec->vtx.prim[exec->vtx.prim_count-1].count--;
 128       }
 129       /* fallthrough */
 130    case GL_QUAD_STRIP:
 131       switch (nr) {
 132       case 0:
 133          ovf = 0;
 134          break;
 135       case 1:
 136          ovf = 1;
 137          break;
 138       default:
 139          ovf = 2 + (nr & 1);
 140          break;
 141       }
 142       for (i = 0 ; i < ovf ; i++)
 143          memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
 144       return i;
 145    case PRIM_OUTSIDE_BEGIN_END:
 146       return 0;
 147    default:
 148       assert(0);
 149       return 0;
 150    }
 151 }
 152
 153
 154
 155 /* TODO: populate these as the vertex is defined:
 156  */
 157 static void
 158 vbo_exec_bind_arrays( struct gl_context *ctx )
 159 {
 160    struct vbo_context *vbo = vbo_context(ctx);
 161    struct vbo_exec_context *exec = &vbo->exec;
 162    struct gl_client_array *arrays = exec->vtx.arrays;
 163    const GLuint *map;
 164    GLuint attr;
 165    GLbitfield64 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 < VERT_ATTRIB_FF_MAX; attr++) {
 173          exec->vtx.inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 174       }
 175       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 176          assert(VERT_ATTRIB_GENERIC(attr) < ARRAY_SIZE(exec->vtx.inputs));
 177          exec->vtx.inputs[VERT_ATTRIB_GENERIC(attr)] =
 178             &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
 179       }
 180       map = vbo->map_vp_none;
 181       break;
 182    case VP_ARB:
 183       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 184          exec->vtx.inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 185       }
 186       for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
 187          assert(VERT_ATTRIB_GENERIC(attr) < ARRAY_SIZE(exec->vtx.inputs));
 188          exec->vtx.inputs[VERT_ATTRIB_GENERIC(attr)] =
 189             &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
 190       }
 191       map = vbo->map_vp_arb;
 192
 193       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 194        * In that case we effectively need to route the data from
 195        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 196        */
 197       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 198           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 199          exec->vtx.inputs[VERT_ATTRIB_GENERIC0] = exec->vtx.inputs[0];
 200          exec->vtx.attrsz[VERT_ATTRIB_GENERIC0] = exec->vtx.attrsz[0];
 201          exec->vtx.attrptr[VERT_ATTRIB_GENERIC0] = exec->vtx.attrptr[0];
 202          exec->vtx.attrsz[0] = 0;
 203       }
 204       break;
 205    default:
 206       assert(0);
 207    }
 208
 209    for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
 210       const GLuint src = map[attr];
 211
 212       if (exec->vtx.attrsz[src]) {
 213          GLsizeiptr offset = (GLbyte *)exec->vtx.attrptr[src] -
 214             (GLbyte *)exec->vtx.vertex;
 215
 216          /* override the default array set above */
 217          assert(attr < ARRAY_SIZE(exec->vtx.inputs));
 218          assert(attr < ARRAY_SIZE(exec->vtx.arrays)); /* arrays[] */
 219          exec->vtx.inputs[attr] = &arrays[attr];
 220
 221          if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 222             /* a real buffer obj: Ptr is an offset, not a pointer*/
 223             assert(exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Pointer);
 224             assert(offset >= 0);
 225             arrays[attr].Ptr = (GLubyte *)
 226                exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset + offset;
 227          }
 228          else {
 229             /* Ptr into ordinary app memory */
 230             arrays[attr].Ptr = (GLubyte *)exec->vtx.buffer_map + offset;
 231          }
 232          arrays[attr].Size = exec->vtx.attrsz[src];
 233          arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
 234          arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
 235          arrays[attr].Type = exec->vtx.attrtype[src];
 236          arrays[attr].Integer =
 237                vbo_attrtype_to_integer_flag(exec->vtx.attrtype[src]);
 238          arrays[attr].Format = GL_RGBA;
 239          arrays[attr].Enabled = 1;
 240          arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
 241          _mesa_reference_buffer_object(ctx,
 242                                        &arrays[attr].BufferObj,
 243                                        exec->vtx.bufferobj);
 244
 245          varying_inputs |= VERT_BIT(attr);
 246       }
 247    }
 248
 249    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 250    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 251 }
 252
 253
 254 /**
 255  * Unmap the VBO.  This is called before drawing.
 256  */
 257 static void
 258 vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
 259 {
 260    if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 261       struct gl_context *ctx = exec->ctx;
 262
 263       if (ctx->Driver.FlushMappedBufferRange) {
 264          GLintptr offset = exec->vtx.buffer_used -
 265                            exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset;
 266          GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) *
 267                              sizeof(float);
 268
 269          if (length)
 270             ctx->Driver.FlushMappedBufferRange(ctx, offset, length,
 271                                                exec->vtx.bufferobj,
 272                                                MAP_INTERNAL);
 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, exec->vtx.bufferobj, MAP_INTERNAL);
 282       exec->vtx.buffer_map = NULL;
 283       exec->vtx.buffer_ptr = NULL;
 284       exec->vtx.max_vert = 0;
 285    }
 286 }
 287
 288
 289 /**
 290  * Map the vertex buffer to begin storing glVertex, glColor, etc data.
 291  */
 292 void
 293 vbo_exec_vtx_map( struct vbo_exec_context *exec )
 294 {
 295    struct gl_context *ctx = exec->ctx;
 296    const GLenum accessRange = GL_MAP_WRITE_BIT |  /* for MapBufferRange */
 297                               GL_MAP_INVALIDATE_RANGE_BIT |
 298                               GL_MAP_UNSYNCHRONIZED_BIT |
 299                               GL_MAP_FLUSH_EXPLICIT_BIT |
 300                               MESA_MAP_NOWAIT_BIT;
 301    const GLenum usage = GL_STREAM_DRAW_ARB;
 302
 303    if (!_mesa_is_bufferobj(exec->vtx.bufferobj))
 304       return;
 305
 306    assert(!exec->vtx.buffer_map);
 307    assert(!exec->vtx.buffer_ptr);
 308
 309    if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024) {
 310       /* The VBO exists and there's room for more */
 311       if (exec->vtx.bufferobj->Size > 0) {
 312          exec->vtx.buffer_map =
 313             (fi_type *)ctx->Driver.MapBufferRange(ctx,
 314                                                   exec->vtx.buffer_used,
 315                                                   (VBO_VERT_BUFFER_SIZE -
 316                                                    exec->vtx.buffer_used),
 317                                                   accessRange,
 318                                                   exec->vtx.bufferobj,
 319                                                   MAP_INTERNAL);
 320          exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 321       }
 322       else {
 323          exec->vtx.buffer_ptr = exec->vtx.buffer_map = NULL;
 324       }
 325    }
 326
 327    if (!exec->vtx.buffer_map) {
 328       /* Need to allocate a new VBO */
 329       exec->vtx.buffer_used = 0;
 330
 331       if (ctx->Driver.BufferData(ctx, GL_ARRAY_BUFFER_ARB,
 332                                  VBO_VERT_BUFFER_SIZE,
 333                                  NULL, usage,
 334                                  GL_MAP_WRITE_BIT |
 335                                  GL_DYNAMIC_STORAGE_BIT |
 336                                  GL_CLIENT_STORAGE_BIT,
 337                                  exec->vtx.bufferobj)) {
 338          /* buffer allocation worked, now map the buffer */
 339          exec->vtx.buffer_map =
 340             (fi_type *)ctx->Driver.MapBufferRange(ctx,
 341                                                   0, VBO_VERT_BUFFER_SIZE,
 342                                                   accessRange,
 343                                                   exec->vtx.bufferobj,
 344                                                   MAP_INTERNAL);
 345       }
 346       else {
 347          _mesa_error(ctx, GL_OUT_OF_MEMORY, "VBO allocation");
 348          exec->vtx.buffer_map = NULL;
 349       }
 350    }
 351
 352    exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 353
 354    if (!exec->vtx.buffer_map) {
 355       /* out of memory */
 356       _mesa_install_exec_vtxfmt( ctx, &exec->vtxfmt_noop );
 357    }
 358    else {
 359       if (_mesa_using_noop_vtxfmt(ctx->Exec)) {
 360          /* The no-op functions are installed so switch back to regular
 361           * functions.  We do this test just to avoid frequent and needless
 362           * calls to _mesa_install_exec_vtxfmt().
 363           */
 364          _mesa_install_exec_vtxfmt(ctx, &exec->vtxfmt);
 365       }
 366    }
 367
 368    if (0)
 369       printf("map %d..\n", exec->vtx.buffer_used);
 370 }
 371
 372
 373
 374 /**
 375  * Execute the buffer and save copied verts.
 376  * \param keep_unmapped  if true, leave the VBO unmapped when we're done.
 377  */
 378 void
 379 vbo_exec_vtx_flush(struct vbo_exec_context *exec, GLboolean keepUnmapped)
 380 {
 381    if (0)
 382       vbo_exec_debug_verts( exec );
 383
 384    if (exec->vtx.prim_count &&
 385        exec->vtx.vert_count) {
 386
 387       exec->vtx.copied.nr = vbo_copy_vertices( exec );
 388
 389       if (exec->vtx.copied.nr != exec->vtx.vert_count) {
 390          struct gl_context *ctx = exec->ctx;
 391
 392          /* Before the update_state() as this may raise _NEW_VARYING_VP_INPUTS
 393           * from _mesa_set_varying_vp_inputs().
 394           */
 395          vbo_exec_bind_arrays( ctx );
 396
 397          if (ctx->NewState)
 398             _mesa_update_state( ctx );
 399
 400          if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 401             vbo_exec_vtx_unmap( exec );
 402          }
 403
 404          if (0)
 405             printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
 406                    exec->vtx.vert_count);
 407
 408          vbo_context(ctx)->draw_prims( ctx,
 409                                        exec->vtx.prim,
 410                                        exec->vtx.prim_count,
 411                                        NULL,
 412                                        GL_TRUE,
 413                                        0,
 414                                        exec->vtx.vert_count - 1,
 415                                        NULL, NULL);
 416
 417          /* If using a real VBO, get new storage -- unless asked not to.
 418           */
 419          if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !keepUnmapped) {
 420             vbo_exec_vtx_map( exec );
 421          }
 422       }
 423    }
 424
 425    /* May have to unmap explicitly if we didn't draw:
 426     */
 427    if (keepUnmapped &&
 428        _mesa_is_bufferobj(exec->vtx.bufferobj) &&
 429        exec->vtx.buffer_map) {
 430       vbo_exec_vtx_unmap( exec );
 431    }
 432
 433    if (keepUnmapped || exec->vtx.vertex_size == 0)
 434       exec->vtx.max_vert = 0;
 435    else
 436       exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 437                             (exec->vtx.vertex_size * sizeof(GLfloat)));
 438
 439    exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 440    exec->vtx.prim_count = 0;
 441    exec->vtx.vert_count = 0;
 442 }