src/mesa/vbo/vbo_save.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
  29 #include "main/mtypes.h"
  30 #include "main/bufferobj.h"
  31
  32 #include "vbo_private.h"
  33
  34
  35 /**
  36  * Called at context creation time.
  37  */
  38 void vbo_save_init( struct gl_context *ctx )
  39 {
  40    struct vbo_context *vbo = vbo_context(ctx);
  41    struct vbo_save_context *save = &vbo->save;
  42
  43    save->ctx = ctx;
  44
  45    vbo_save_api_init( save );
  46
  47    {
  48       struct gl_vertex_array *arrays = save->arrays;
  49       unsigned i;
  50
  51       memcpy(arrays, &vbo->currval[VBO_ATTRIB_POS],
  52              VERT_ATTRIB_FF_MAX * sizeof(arrays[0]));
  53       for (i = 0; i < VERT_ATTRIB_FF_MAX; ++i) {
  54          struct gl_vertex_array *array;
  55          array = &arrays[VERT_ATTRIB_FF(i)];
  56          array->BufferObj = NULL;
  57          _mesa_reference_buffer_object(ctx, &arrays->BufferObj,
  58                                        vbo->currval[VBO_ATTRIB_POS+i].BufferObj);
  59       }
  60
  61       memcpy(arrays + VERT_ATTRIB_GENERIC(0),
  62              &vbo->currval[VBO_ATTRIB_GENERIC0],
  63              VERT_ATTRIB_GENERIC_MAX * sizeof(arrays[0]));
  64
  65       for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; ++i) {
  66          struct gl_vertex_array *array;
  67          array = &arrays[VERT_ATTRIB_GENERIC(i)];
  68          array->BufferObj = NULL;
  69          _mesa_reference_buffer_object(ctx, &array->BufferObj,
  70                            vbo->currval[VBO_ATTRIB_GENERIC0+i].BufferObj);
  71       }
  72    }
  73
  74    ctx->Driver.CurrentSavePrimitive = PRIM_OUTSIDE_BEGIN_END;
  75 }
  76
  77
  78 void vbo_save_destroy( struct gl_context *ctx )
  79 {
  80    struct vbo_context *vbo = vbo_context(ctx);
  81    struct vbo_save_context *save = &vbo->save;
  82    GLuint i;
  83
  84    if (save->prim_store) {
  85       if ( --save->prim_store->refcount == 0 ) {
  86          free(save->prim_store);
  87          save->prim_store = NULL;
  88       }
  89       if ( --save->vertex_store->refcount == 0 ) {
  90          _mesa_reference_buffer_object(ctx,
  91                                        &save->vertex_store->bufferobj, NULL);
  92          free(save->vertex_store);
  93          save->vertex_store = NULL;
  94       }
  95    }
  96
  97    for (i = 0; i < VBO_ATTRIB_MAX; i++) {
  98       _mesa_reference_buffer_object(ctx, &save->arrays[i].BufferObj, NULL);
  99    }
 100 }
 101
 102
 103
 104
 105 /* Note that this can occur during the playback of a display list:
 106  */
 107 void vbo_save_fallback( struct gl_context *ctx, GLboolean fallback )
 108 {
 109    struct vbo_save_context *save = &vbo_context(ctx)->save;
 110
 111    if (fallback)
 112       save->replay_flags |= VBO_SAVE_FALLBACK;
 113    else
 114       save->replay_flags &= ~VBO_SAVE_FALLBACK;
 115 }