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
  39 vbo_exec_debug_verts( struct vbo_exec_context *exec )
  40 {
  41    GLuint count = exec->vtx.vert_count;
  42    GLuint i;
  43
  44    _mesa_printf("%s: %u vertices %d primitives, %d vertsize\n",
  45                 __FUNCTION__,
  46                 count,
  47                 exec->vtx.prim_count,
  48                 exec->vtx.vertex_size);
  49
  50    for (i = 0 ; i < exec->vtx.prim_count ; i++) {
  51       struct _mesa_prim *prim = &exec->vtx.prim[i];
  52       _mesa_printf("   prim %d: %s%s %d..%d %s %s\n",
  53                    i,
  54                    _mesa_lookup_enum_by_nr(prim->mode),
  55                    prim->weak ? " (weak)" : "",
  56                    prim->start,
  57                    prim->start + prim->count,
  58                    prim->begin ? "BEGIN" : "(wrap)",
  59                    prim->end ? "END" : "(wrap)");
  60    }
  61 }
  62
  63
  64 /*
  65  * NOTE: Need to have calculated primitives by this point -- do it on the fly.
  66  * NOTE: Old 'parity' issue is gone.
  67  */
  68 static GLuint
  69 vbo_copy_vertices( struct vbo_exec_context *exec )
  70 {
  71    GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
  72    GLuint ovf, i;
  73    GLuint sz = exec->vtx.vertex_size;
  74    GLfloat *dst = exec->vtx.copied.buffer;
  75    const GLfloat *src = (exec->vtx.buffer_map +
  76                          exec->vtx.prim[exec->vtx.prim_count-1].start *
  77                          exec->vtx.vertex_size);
  78
  79
  80    switch (exec->ctx->Driver.CurrentExecPrimitive) {
  81    case GL_POINTS:
  82       return 0;
  83    case GL_LINES:
  84       ovf = nr&1;
  85       for (i = 0 ; i < ovf ; i++)
  86          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  87       return i;
  88    case GL_TRIANGLES:
  89       ovf = nr%3;
  90       for (i = 0 ; i < ovf ; i++)
  91          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  92       return i;
  93    case GL_QUADS:
  94       ovf = nr&3;
  95       for (i = 0 ; i < ovf ; i++)
  96          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  97       return i;
  98    case GL_LINE_STRIP:
  99       if (nr == 0) {
 100          return 0;
 101       }
 102       else {
 103          _mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 104          return 1;
 105       }
 106    case GL_LINE_LOOP:
 107    case GL_TRIANGLE_FAN:
 108    case GL_POLYGON:
 109       if (nr == 0) {
 110          return 0;
 111       }
 112       else if (nr == 1) {
 113          _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
 114          return 1;
 115       }
 116       else {
 117          _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
 118          _mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 119          return 2;
 120       }
 121    case GL_TRIANGLE_STRIP:
 122       /* no parity issue, but need to make sure the tri is not drawn twice */
 123       if (nr & 1) {
 124          exec->vtx.prim[exec->vtx.prim_count-1].count--;
 125       }
 126       /* fallthrough */
 127    case GL_QUAD_STRIP:
 128       switch (nr) {
 129       case 0:
 130          ovf = 0;
 131          break;
 132       case 1:
 133          ovf = 1;
 134          break;
 135       default:
 136          ovf = 2 + (nr & 1);
 137          break;
 138       }
 139       for (i = 0 ; i < ovf ; i++)
 140          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
 141       return i;
 142    case PRIM_OUTSIDE_BEGIN_END:
 143       return 0;
 144    default:
 145       assert(0);
 146       return 0;
 147    }
 148 }
 149
 150
 151
 152 /* TODO: populate these as the vertex is defined:
 153  */
 154 static void
 155 vbo_exec_bind_arrays( GLcontext *ctx )
 156 {
 157    struct vbo_context *vbo = vbo_context(ctx);
 158    struct vbo_exec_context *exec = &vbo->exec;
 159    struct gl_client_array *arrays = exec->vtx.arrays;
 160    const GLuint count = exec->vtx.vert_count;
 161    const GLubyte *data = (GLubyte *) exec->vtx.buffer_map;
 162    const GLuint *map;
 163    GLuint attr;
 164    GLbitfield varying_inputs = 0x0;
 165
 166    /* Install the default (ie Current) attributes first, then overlay
 167     * all active ones.
 168     */
 169    switch (get_program_mode(exec->ctx)) {
 170    case VP_NONE:
 171       for (attr = 0; attr < 16; attr++) {
 172          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 173       }
 174       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 175          exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
 176       }
 177       map = vbo->map_vp_none;
 178       break;
 179    case VP_NV:
 180    case VP_ARB:
 181       /* The aliasing of attributes for NV vertex programs has already
 182        * occurred.  NV vertex programs cannot access material values,
 183        * nor attributes greater than VERT_ATTRIB_TEX7.
 184        */
 185       for (attr = 0; attr < 16; attr++) {
 186          exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
 187          exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
 188       }
 189       map = vbo->map_vp_arb;
 190
 191       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 192        * In that case we effectively need to route the data from
 193        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 194        */
 195       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 196           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 197          exec->vtx.inputs[16] = exec->vtx.inputs[0];
 198          exec->vtx.attrsz[16] = exec->vtx.attrsz[0];
 199          exec->vtx.attrptr[16] = exec->vtx.attrptr[0];
 200          exec->vtx.attrsz[0] = 0;
 201       }
 202       break;
 203    default:
 204       assert(0);
 205    }
 206
 207    /* Make all active attributes (including edgeflag) available as
 208     * arrays of floats.
 209     */
 210    for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
 211       const GLuint src = map[attr];
 212
 213       if (exec->vtx.attrsz[src]) {
 214          /* override the default array set above */
 215          exec->vtx.inputs[attr] = &arrays[attr];
 216
 217          if (exec->vtx.bufferobj->Name) {
 218             /* a real buffer obj: Ptr is an offset, not a pointer*/
 219             GLsizeiptr offset;
 220             assert(exec->vtx.bufferobj->Pointer);  /* buf should be mapped */
 221             offset = (GLbyte *) data - (GLbyte *) exec->vtx.bufferobj->Pointer;
 222             assert(offset >= 0);
 223             arrays[attr].Ptr = (void *) offset;
 224          }
 225          else {
 226             /* Ptr into ordinary app memory */
 227             arrays[attr].Ptr = (void *) data;
 228          }
 229          arrays[attr].Size = exec->vtx.attrsz[src];
 230          arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
 231          arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
 232          arrays[attr].Type = GL_FLOAT;
 233          arrays[attr].Format = GL_RGBA;
 234          arrays[attr].Enabled = 1;
 235          _mesa_reference_buffer_object(ctx,
 236                                        &arrays[attr].BufferObj,
 237                                        exec->vtx.bufferobj);
 238          arrays[attr]._MaxElement = count; /* ??? */
 239
 240          data += exec->vtx.attrsz[src] * sizeof(GLfloat);
 241          varying_inputs |= 1 << attr;
 242       }
 243    }
 244
 245    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 246 }
 247
 248
 249 static void
 250 vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
 251 {
 252    GLenum target = GL_ARRAY_BUFFER_ARB;
 253
 254    if (exec->vtx.bufferobj->Name) {
 255       GLcontext *ctx = exec->ctx;
 256
 257       if (ctx->Driver.FlushMappedBufferRange) {
 258          GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
 259          GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
 260
 261          if (length)
 262             ctx->Driver.FlushMappedBufferRange(ctx, target,
 263                                                offset, length,
 264                                                exec->vtx.bufferobj);
 265       }
 266
 267       exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
 268                                 exec->vtx.buffer_map) * sizeof(float);
 269
 270       assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
 271       assert(exec->vtx.buffer_ptr != NULL);
 272
 273       ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
 274       exec->vtx.buffer_map = NULL;
 275       exec->vtx.buffer_ptr = NULL;
 276       exec->vtx.max_vert = 0;
 277    }
 278 }
 279
 280
 281 void
 282 vbo_exec_vtx_map( struct vbo_exec_context *exec )
 283 {
 284    GLcontext *ctx = exec->ctx;
 285    const GLenum target = GL_ARRAY_BUFFER_ARB;
 286    const GLenum access = GL_READ_WRITE_ARB; /* for MapBuffer */
 287    const GLenum accessRange = GL_MAP_WRITE_BIT |  /* for MapBufferRange */
 288                               GL_MAP_INVALIDATE_RANGE_BIT |
 289                               GL_MAP_UNSYNCHRONIZED_BIT |
 290                               GL_MAP_FLUSH_EXPLICIT_BIT |
 291                               MESA_MAP_NOWAIT_BIT;
 292    const GLenum usage = GL_STREAM_DRAW_ARB;
 293
 294    if (exec->vtx.bufferobj->Name == 0)
 295       return;
 296
 297    if (exec->vtx.buffer_map != NULL) {
 298       assert(0);
 299       exec->vtx.buffer_map = NULL;
 300       exec->vtx.buffer_ptr = NULL;
 301    }
 302
 303    if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024 &&
 304        ctx->Driver.MapBufferRange) {
 305       exec->vtx.buffer_map =
 306          (GLfloat *)ctx->Driver.MapBufferRange(ctx,
 307                                                target,
 308                                                exec->vtx.buffer_used,
 309                                                (VBO_VERT_BUFFER_SIZE -
 310                                                 exec->vtx.buffer_used),
 311                                                accessRange,
 312                                                exec->vtx.bufferobj);
 313       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 314    }
 315
 316    if (!exec->vtx.buffer_map) {
 317       exec->vtx.buffer_used = 0;
 318
 319       ctx->Driver.BufferData(ctx, target,
 320                              VBO_VERT_BUFFER_SIZE,
 321                              NULL, usage, exec->vtx.bufferobj);
 322
 323
 324       if (ctx->Driver.MapBufferRange)
 325          exec->vtx.buffer_map =
 326             (GLfloat *)ctx->Driver.MapBufferRange(ctx, target,
 327                                                   0, VBO_VERT_BUFFER_SIZE,
 328                                                   accessRange,
 329                                                   exec->vtx.bufferobj);
 330       else
 331          exec->vtx.buffer_map =
 332             (GLfloat *)ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
 333       exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 334    }
 335
 336    if (0)
 337       _mesa_printf("map %d..\n", exec->vtx.buffer_used);
 338 }
 339
 340
 341
 342 /**
 343  * Execute the buffer and save copied verts.
 344  */
 345 void
 346 vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
 347 {
 348    if (0)
 349       vbo_exec_debug_verts( exec );
 350
 351    if (exec->vtx.prim_count &&
 352        exec->vtx.vert_count) {
 353
 354       exec->vtx.copied.nr = vbo_copy_vertices( exec );
 355
 356       if (exec->vtx.copied.nr != exec->vtx.vert_count) {
 357          GLcontext *ctx = exec->ctx;
 358
 359          /* Before the update_state() as this may raise _NEW_ARRAY
 360           * from _mesa_set_varying_vp_inputs().
 361           */
 362          vbo_exec_bind_arrays( ctx );
 363
 364          if (ctx->NewState)
 365             _mesa_update_state( ctx );
 366
 367          if (exec->vtx.bufferobj->Name) {
 368             vbo_exec_vtx_unmap( exec );
 369          }
 370
 371          if (0)
 372             _mesa_printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
 373                          exec->vtx.vert_count);
 374
 375          vbo_context(ctx)->draw_prims( ctx,
 376                                        exec->vtx.inputs,
 377                                        exec->vtx.prim,
 378                                        exec->vtx.prim_count,
 379                                        NULL,
 380                                        0,
 381                                        exec->vtx.vert_count - 1);
 382
 383          /* If using a real VBO, get new storage -- unless asked not to.
 384           */
 385          if (exec->vtx.bufferobj->Name && !unmap) {
 386             vbo_exec_vtx_map( exec );
 387          }
 388       }
 389    }
 390
 391    /* May have to unmap explicitly if we didn't draw:
 392     */
 393    if (unmap &&
 394        exec->vtx.bufferobj->Name &&
 395        exec->vtx.buffer_map) {
 396       vbo_exec_vtx_unmap( exec );
 397    }
 398
 399    if (unmap)
 400       exec->vtx.max_vert = 0;
 401    else
 402       exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 403                             (exec->vtx.vertex_size * sizeof(GLfloat)));
 404
 405    exec->vtx.buffer_ptr = exec->vtx.buffer_map;
 406    exec->vtx.prim_count = 0;
 407    exec->vtx.vert_count = 0;
 408 }