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 #include "main/macros.h"
  34
  35 #include "vbo_context.h"
  36
  37
  38 #if FEATURE_beginend
  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    _mesa_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       _mesa_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    GLfloat *dst = exec->vtx.copied.buffer;
  78    const GLfloat *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          _mesa_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          _mesa_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          _mesa_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          _mesa_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          _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
 117          return 1;
 118       }
 119       else {
 120          _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
 121          _mesa_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          _mesa_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( GLcontext *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 count = exec->vtx.vert_count;
 164    const GLubyte *data = (GLubyte *) exec->vtx.buffer_map;
 165    const GLuint *map;
 166    GLuint attr;
 167    GLbitfield varying_inputs = 0x0;
 168
 169    /* Install the default (ie Current) attributes first, then overlay
 170     * all active ones.
 171     */
 172    switch (get_program_mode(exec->ctx)) {
 173    case VP_NONE:
 174       for (attr = 0; attr < 16; attr++) {
 175          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 176       }
 177       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 178          ASSERT(attr + 16 < Elements(exec->vtx.inputs));
 179          exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
 180       }
 181       map = vbo->map_vp_none;
 182       break;
 183    case VP_NV:
 184    case VP_ARB:
 185       /* The aliasing of attributes for NV vertex programs has already
 186        * occurred.  NV vertex programs cannot access material values,
 187        * nor attributes greater than VERT_ATTRIB_TEX7.
 188        */
 189       for (attr = 0; attr < 16; attr++) {
 190          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 191          ASSERT(attr + 16 < Elements(exec->vtx.inputs));
 192          exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
 193       }
 194       map = vbo->map_vp_arb;
 195
 196       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 197        * In that case we effectively need to route the data from
 198        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 199        */
 200       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 201           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 202          exec->vtx.inputs[16] = exec->vtx.inputs[0];
 203          exec->vtx.attrsz[16] = exec->vtx.attrsz[0];
 204          exec->vtx.attrptr[16] = exec->vtx.attrptr[0];
 205          exec->vtx.attrsz[0] = 0;
 206       }
 207       break;
 208    default:
 209       assert(0);
 210    }
 211
 212    /* Make all active attributes (including edgeflag) available as
 213     * arrays of floats.
 214     */
 215    for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
 216       const GLuint src = map[attr];
 217
 218       if (exec->vtx.attrsz[src]) {
 219          /* override the default array set above */
 220          ASSERT(attr < Elements(exec->vtx.inputs));
 221          ASSERT(attr < Elements(exec->vtx.arrays)); /* arrays[] */
 222          exec->vtx.inputs[attr] = &arrays[attr];
 223
 224          if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 225             /* a real buffer obj: Ptr is an offset, not a pointer*/
 226             GLsizeiptr offset;
 227             assert(exec->vtx.bufferobj->Pointer);  /* buf should be mapped */
 228             offset = (GLbyte *) data -
 229                (GLbyte *) exec->vtx.bufferobj->Pointer +
 230                exec->vtx.bufferobj->Offset;
 231             assert(offset >= 0);
 232             arrays[attr].Ptr = (void *) offset;
 233          }
 234          else {
 235             /* Ptr into ordinary app memory */
 236             arrays[attr].Ptr = (void *) data;
 237          }
 238          arrays[attr].Size = exec->vtx.attrsz[src];
 239          arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
 240          arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
 241          arrays[attr].Type = GL_FLOAT;
 242          arrays[attr].Format = GL_RGBA;
 243          arrays[attr].Enabled = 1;
 244          _mesa_reference_buffer_object(ctx,
 245                                        &arrays[attr].BufferObj,
 246                                        exec->vtx.bufferobj);
 247          arrays[attr]._MaxElement = count; /* ??? */
 248
 249          data += exec->vtx.attrsz[src] * sizeof(GLfloat);
 250          varying_inputs |= 1 << attr;
 251       }
 252    }
 253
 254    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 255 }
 256
 257
 258 static void
 259 vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
 260 {
 261    GLenum target = GL_ARRAY_BUFFER_ARB;
 262
 263    if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 264       GLcontext *ctx = exec->ctx;
 265
 266       if (ctx->Driver.FlushMappedBufferRange) {
 267          GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
 268          GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
 269
 270          if (length)
 271             ctx->Driver.FlushMappedBufferRange(ctx, target,
 272                                                offset, length,
 273                                                exec->vtx.bufferobj);
 274       }
 275
 276       exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
 277                                 exec->vtx.buffer_map) * sizeof(float);
 278
 279       assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
 280       assert(exec->vtx.buffer_ptr != NULL);
 281
 282       ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
 283       exec->vtx.buffer_map = NULL;
 284       exec->vtx.buffer_ptr = NULL;
 285       exec->vtx.max_vert = 0;
 286    }
 287 }
 288
 289
 290 void
 291 vbo_exec_vtx_map( struct vbo_exec_context *exec )
 292 {
 293    GLcontext *ctx = exec->ctx;
 294    const GLenum target = GL_ARRAY_BUFFER_ARB;
 295    const GLenum access = GL_READ_WRITE_ARB; /* for MapBuffer */
 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    if (exec->vtx.buffer_map != NULL) {
 307       assert(0);
 308       exec->vtx.buffer_map = NULL;
 309       exec->vtx.buffer_ptr = NULL;
 310    }
 311
 312    if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024 &&
 313        ctx->Driver.MapBufferRange) {
 314       exec->vtx.buffer_map =
 315          (GLfloat *)ctx->Driver.MapBufferRange(ctx,
 316                                                target,
 317                                                exec->vtx.buffer_used,
 318                                                (VBO_VERT_BUFFER_SIZE -
 319                                                 exec->vtx.buffer_used),
 320                                                accessRange,
 321                                                exec->vtx.bufferobj);
 322       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 323    }
 324
 325    if (!exec->vtx.buffer_map) {
 326       exec->vtx.buffer_used = 0;
 327
 328       ctx->Driver.BufferData(ctx, target,
 329                              VBO_VERT_BUFFER_SIZE,
 330                              NULL, usage, exec->vtx.bufferobj);
 331
 332
 333       if (ctx->Driver.MapBufferRange)
 334          exec->vtx.buffer_map =
 335             (GLfloat *)ctx->Driver.MapBufferRange(ctx, target,
 336                                                   0, VBO_VERT_BUFFER_SIZE,
 337                                                   accessRange,
 338                                                   exec->vtx.bufferobj);
 339       if (!exec->vtx.buffer_map)
 340          exec->vtx.buffer_map =
 341             (GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
 342       assert(exec->vtx.buffer_map);
 343       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 344    }
 345
 346    if (0)
 347       _mesa_printf("map %d..\n", exec->vtx.buffer_used);
 348 }
 349
 350
 351
 352 /**
 353  * Execute the buffer and save copied verts.
 354  */
 355 void
 356 vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
 357 {
 358    if (0)
 359       vbo_exec_debug_verts( exec );
 360
 361    if (exec->vtx.prim_count &&
 362        exec->vtx.vert_count) {
 363
 364       exec->vtx.copied.nr = vbo_copy_vertices( exec );
 365
 366       if (exec->vtx.copied.nr != exec->vtx.vert_count) {
 367          GLcontext *ctx = exec->ctx;
 368
 369          /* Before the update_state() as this may raise _NEW_ARRAY
 370           * from _mesa_set_varying_vp_inputs().
 371           */
 372          vbo_exec_bind_arrays( ctx );
 373
 374          if (ctx->NewState)
 375             _mesa_update_state( ctx );
 376
 377          if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
 378             vbo_exec_vtx_unmap( exec );
 379          }
 380
 381          if (0)
 382             _mesa_printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
 383                          exec->vtx.vert_count);
 384
 385          vbo_context(ctx)->draw_prims( ctx,
 386                                        exec->vtx.inputs,
 387                                        exec->vtx.prim,
 388                                        exec->vtx.prim_count,
 389                                        NULL,
 390                                        GL_TRUE,
 391                                        0,
 392                                        exec->vtx.vert_count - 1);
 393
 394          /* If using a real VBO, get new storage -- unless asked not to.
 395           */
 396          if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !unmap) {
 397             vbo_exec_vtx_map( exec );
 398          }
 399       }
 400    }
 401
 402    /* May have to unmap explicitly if we didn't draw:
 403     */
 404    if (unmap &&
 405        _mesa_is_bufferobj(exec->vtx.bufferobj) &&
 406        exec->vtx.buffer_map) {
 407       vbo_exec_vtx_unmap( exec );
 408    }
 409
 410
 411    if (unmap || exec->vtx.vertex_size == 0)
 412       exec->vtx.max_vert = 0;
 413    else
 414       exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 415                             (exec->vtx.vertex_size * sizeof(GLfloat)));
 416
 417    exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 418    exec->vtx.prim_count = 0;
 419    exec->vtx.vert_count = 0;
 420 }
 421
 422
 423 #endif /* FEATURE_beginend */