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 static void vbo_exec_debug_verts( struct vbo_exec_context *exec )
  39 {
  40    GLuint count = exec->vtx.vert_count;
  41    GLuint i;
  42
  43    _mesa_printf("%s: %u vertices %d primitives, %d vertsize\n",
  44                 __FUNCTION__,
  45                 count,
  46                 exec->vtx.prim_count,
  47                 exec->vtx.vertex_size);
  48
  49    for (i = 0 ; i < exec->vtx.prim_count ; i++) {
  50       struct _mesa_prim *prim = &exec->vtx.prim[i];
  51       _mesa_printf("   prim %d: %s%s %d..%d %s %s\n",
  52                    i,
  53                    _mesa_lookup_enum_by_nr(prim->mode),
  54                    prim->weak ? " (weak)" : "",
  55                    prim->start,
  56                    prim->start + prim->count,
  57                    prim->begin ? "BEGIN" : "(wrap)",
  58                    prim->end ? "END" : "(wrap)");
  59    }
  60 }
  61
  62
  63 /*
  64  * NOTE: Need to have calculated primitives by this point -- do it on the fly.
  65  * NOTE: Old 'parity' issue is gone.
  66  */
  67 static GLuint vbo_copy_vertices( struct vbo_exec_context *exec )
  68 {
  69    GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
  70    GLuint ovf, i;
  71    GLuint sz = exec->vtx.vertex_size;
  72    GLfloat *dst = exec->vtx.copied.buffer;
  73    GLfloat *src = (exec->vtx.buffer_map +
  74                    exec->vtx.prim[exec->vtx.prim_count-1].start *
  75                    exec->vtx.vertex_size);
  76
  77
  78    switch( exec->ctx->Driver.CurrentExecPrimitive )
  79    {
  80    case GL_POINTS:
  81       return 0;
  82    case GL_LINES:
  83       ovf = nr&1;
  84       for (i = 0 ; i < ovf ; i++)
  85          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  86       return i;
  87    case GL_TRIANGLES:
  88       ovf = nr%3;
  89       for (i = 0 ; i < ovf ; i++)
  90          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  91       return i;
  92    case GL_QUADS:
  93       ovf = nr&3;
  94       for (i = 0 ; i < ovf ; i++)
  95          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  96       return i;
  97    case GL_LINE_STRIP:
  98       if (nr == 0)
  99          return 0;
 100       else {
 101          _mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 102          return 1;
 103       }
 104    case GL_LINE_LOOP:
 105    case GL_TRIANGLE_FAN:
 106    case GL_POLYGON:
 107       if (nr == 0)
 108          return 0;
 109       else if (nr == 1) {
 110          _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
 111          return 1;
 112       } else {
 113          _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
 114          _mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 115          return 2;
 116       }
 117    case GL_TRIANGLE_STRIP:
 118       /* no parity issue, but need to make sure the tri is not drawn twice */
 119       if (nr & 1) {
 120          exec->vtx.prim[exec->vtx.prim_count-1].count--;
 121       }
 122       /* fallthrough */
 123    case GL_QUAD_STRIP:
 124       switch (nr) {
 125       case 0: ovf = 0; break;
 126       case 1: ovf = 1; break;
 127       default: ovf = 2 + (nr&1); break;
 128       }
 129       for (i = 0 ; i < ovf ; i++)
 130          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
 131       return i;
 132    case PRIM_OUTSIDE_BEGIN_END:
 133       return 0;
 134    default:
 135       assert(0);
 136       return 0;
 137    }
 138 }
 139
 140
 141
 142 /* TODO: populate these as the vertex is defined:
 143  */
 144 static void vbo_exec_bind_arrays( GLcontext *ctx )
 145 {
 146    struct vbo_context *vbo = vbo_context(ctx);
 147    struct vbo_exec_context *exec = &vbo->exec;
 148    struct gl_client_array *arrays = exec->vtx.arrays;
 149    GLuint count = exec->vtx.vert_count;
 150    GLubyte *data = (GLubyte *)exec->vtx.buffer_map;
 151    const GLuint *map;
 152    GLuint attr;
 153    GLbitfield varying_inputs = 0x0;
 154
 155    /* Install the default (ie Current) attributes first, then overlay
 156     * all active ones.
 157     */
 158    switch (get_program_mode(exec->ctx)) {
 159    case VP_NONE:
 160       for (attr = 0; attr < 16; attr++) {
 161          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 162       }
 163       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 164          exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
 165       }
 166       map = vbo->map_vp_none;
 167       break;
 168    case VP_NV:
 169    case VP_ARB:
 170       /* The aliasing of attributes for NV vertex programs has already
 171        * occurred.  NV vertex programs cannot access material values,
 172        * nor attributes greater than VERT_ATTRIB_TEX7.
 173        */
 174       for (attr = 0; attr < 16; attr++) {
 175          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 176          exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
 177       }
 178       map = vbo->map_vp_arb;
 179
 180       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 181        * In that case we effectively need to route the data from
 182        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 183        */
 184       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 185           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 186          exec->vtx.inputs[16] = exec->vtx.inputs[0];
 187          exec->vtx.attrsz[16] = exec->vtx.attrsz[0];
 188          exec->vtx.attrptr[16] = exec->vtx.attrptr[0];
 189          exec->vtx.attrsz[0] = 0;
 190       }
 191       break;
 192    default:
 193       assert(0);
 194    }
 195
 196    /* Make all active attributes (including edgeflag) available as
 197     * arrays of floats.
 198     */
 199    for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
 200       const GLuint src = map[attr];
 201
 202       if (exec->vtx.attrsz[src]) {
 203          /* override the default array set above */
 204          exec->vtx.inputs[attr] = &arrays[attr];
 205
 206          if (exec->vtx.bufferobj->Name) {
 207             /* a real buffer obj: Ptr is an offset, not a pointer*/
 208             GLsizeiptr offset;
 209             assert(exec->vtx.bufferobj->Pointer);  /* buf should be mapped */
 210             offset = (GLbyte *) data - (GLbyte *) exec->vtx.bufferobj->Pointer;
 211             assert(offset >= 0);
 212             arrays[attr].Ptr = (void *) offset;
 213          }
 214          else {
 215             /* Ptr into ordinary app memory */
 216             arrays[attr].Ptr = (void *) data;
 217          }
 218          arrays[attr].Size = exec->vtx.attrsz[src];
 219          arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
 220          arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
 221          arrays[attr].Type = GL_FLOAT;
 222          arrays[attr].Format = GL_RGBA;
 223          arrays[attr].Enabled = 1;
 224          _mesa_reference_buffer_object(ctx,
 225                                        &arrays[attr].BufferObj,
 226                                        exec->vtx.bufferobj);
 227          arrays[attr]._MaxElement = count; /* ??? */
 228
 229          data += exec->vtx.attrsz[src] * sizeof(GLfloat);
 230          varying_inputs |= 1<<attr;
 231       }
 232    }
 233
 234    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 235 }
 236
 237
 238 static void vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
 239 {
 240    GLenum target = GL_ARRAY_BUFFER_ARB;
 241
 242    if (exec->vtx.bufferobj->Name) {
 243       GLcontext *ctx = exec->ctx;
 244
 245       if(ctx->Driver.FlushMappedBufferRange) {
 246          GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
 247          GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
 248
 249          if(length)
 250             ctx->Driver.FlushMappedBufferRange(ctx, target,
 251                                                offset, length,
 252                                                exec->vtx.bufferobj);
 253       }
 254
 255       exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
 256                                 exec->vtx.buffer_map) * sizeof(float);
 257
 258       assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
 259       assert(exec->vtx.buffer_ptr != NULL);
 260
 261       ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
 262       exec->vtx.buffer_map = NULL;
 263       exec->vtx.buffer_ptr = NULL;
 264       exec->vtx.max_vert = 0;
 265    }
 266 }
 267
 268 void vbo_exec_vtx_map( struct vbo_exec_context *exec )
 269 {
 270    GLcontext *ctx = exec->ctx;
 271    const GLenum target = GL_ARRAY_BUFFER_ARB;
 272    const GLenum access = GL_READ_WRITE_ARB; /* for MapBuffer */
 273    const GLenum accessRange = GL_MAP_WRITE_BIT |  /* for MapBufferRange */
 274                               GL_MAP_INVALIDATE_RANGE_BIT |
 275                               GL_MAP_UNSYNCHRONIZED_BIT |
 276                               GL_MAP_FLUSH_EXPLICIT_BIT |
 277                               MESA_MAP_NOWAIT_BIT;
 278    const GLenum usage = GL_STREAM_DRAW_ARB;
 279
 280    if (exec->vtx.bufferobj->Name == 0)
 281       return;
 282
 283    if (exec->vtx.buffer_map != NULL) {
 284       assert(0);
 285       exec->vtx.buffer_map = NULL;
 286       exec->vtx.buffer_ptr = NULL;
 287    }
 288
 289    if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024 &&
 290        ctx->Driver.MapBufferRange)
 291    {
 292       exec->vtx.buffer_map =
 293          (GLfloat *)ctx->Driver.MapBufferRange(ctx,
 294                                                target,
 295                                                exec->vtx.buffer_used,
 296                                                (VBO_VERT_BUFFER_SIZE -
 297                                                 exec->vtx.buffer_used),
 298                                                accessRange,
 299                                                exec->vtx.bufferobj);
 300       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 301    }
 302
 303    if (!exec->vtx.buffer_map) {
 304       exec->vtx.buffer_used = 0;
 305
 306       ctx->Driver.BufferData(ctx, target,
 307                              VBO_VERT_BUFFER_SIZE,
 308                              NULL, usage, exec->vtx.bufferobj);
 309
 310
 311       if (ctx->Driver.MapBufferRange)
 312          exec->vtx.buffer_map =
 313             (GLfloat *)ctx->Driver.MapBufferRange(ctx, target,
 314                                                   0, VBO_VERT_BUFFER_SIZE,
 315                                                   accessRange,
 316                                                   exec->vtx.bufferobj);
 317       else
 318          exec->vtx.buffer_map =
 319             (GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
 320       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 321    }
 322
 323    if (0) _mesa_printf("map %d..\n", exec->vtx.buffer_used);
 324 }
 325
 326
 327
 328 /**
 329  * Execute the buffer and save copied verts.
 330  */
 331 void vbo_exec_vtx_flush( struct vbo_exec_context *exec,
 332                          GLboolean unmap )
 333 {
 334    if (0)
 335       vbo_exec_debug_verts( exec );
 336
 337
 338    if (exec->vtx.prim_count &&
 339        exec->vtx.vert_count) {
 340
 341       exec->vtx.copied.nr = vbo_copy_vertices( exec );
 342
 343       if (exec->vtx.copied.nr != exec->vtx.vert_count) {
 344          GLcontext *ctx = exec->ctx;
 345
 346          /* Before the update_state() as this may raise _NEW_ARRAY
 347           * from _mesa_set_varying_vp_inputs().
 348           */
 349          vbo_exec_bind_arrays( ctx );
 350
 351          if (ctx->NewState)
 352             _mesa_update_state( ctx );
 353
 354          if (exec->vtx.bufferobj->Name) {
 355             vbo_exec_vtx_unmap( exec );
 356          }
 357
 358          if (0) _mesa_printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
 359                       exec->vtx.vert_count);
 360
 361          vbo_context(ctx)->draw_prims( ctx,
 362                                        exec->vtx.inputs,
 363                                        exec->vtx.prim,
 364                                        exec->vtx.prim_count,
 365                                        NULL,
 366                                        0,
 367                                        exec->vtx.vert_count - 1);
 368
 369          /* If using a real VBO, get new storage -- unless asked not to.
 370           */
 371          if (exec->vtx.bufferobj->Name && !unmap) {
 372             vbo_exec_vtx_map( exec );
 373           }
 374       }
 375    }
 376
 377    /* May have to unmap explicitly if we didn't draw:
 378     */
 379    if (unmap &&
 380        exec->vtx.bufferobj->Name &&
 381        exec->vtx.buffer_map) {
 382       vbo_exec_vtx_unmap( exec );
 383    }
 384
 385
 386    if (unmap)
 387       exec->vtx.max_vert = 0;
 388    else
 389       exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 390                             (exec->vtx.vertex_size * sizeof(GLfloat)));
 391
 392
 393    exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 394    exec->vtx.prim_count = 0;
 395    exec->vtx.vert_count = 0;
 396 }