src/mesa/tnl/t_imm_alloc.c

   1 /* $Id: t_imm_alloc.c,v 1.16 2002/10/24 23:57:25 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  4.1
   6  *
   7  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Keith Whitwell <keithw@valinux.com>
  28  */
  29
  30 #include "glheader.h"
  31 #include "imports.h"
  32 #include "mtypes.h"
  33
  34 #include "t_imm_alloc.h"
  35
  36
  37 static int id = 0;  /* give each struct immediate a unique ID number */
  38
  39 static struct immediate *real_alloc_immediate( GLcontext *ctx )
  40 {
  41    struct immediate *IM = ALIGN_CALLOC_STRUCT( immediate, 32 );
  42
  43    if (!IM)
  44       return 0;
  45
  46 /*     memset(IM, 0, sizeof(*IM)); */
  47
  48    IM->id = id++;
  49    IM->ref_count = 0;
  50    IM->FlushElt = 0;
  51    IM->LastPrimitive = IMM_MAX_COPIED_VERTS;
  52    IM->Count = IMM_MAX_COPIED_VERTS;
  53    IM->Start = IMM_MAX_COPIED_VERTS;
  54    IM->Material = 0;
  55    IM->MaterialMask = 0;
  56    IM->MaxTextureUnits = ctx->Const.MaxTextureUnits;
  57    IM->TexSize = 0;
  58    IM->NormalLengthPtr = 0;
  59
  60    IM->CopyTexSize = 0;
  61    IM->CopyStart = IM->Start;
  62
  63    return IM;
  64 }
  65
  66
  67 static void real_free_immediate( struct immediate *IM )
  68 {
  69    static int freed = 0;
  70
  71    if (IM->Material) {
  72       FREE( IM->Material );
  73       FREE( IM->MaterialMask );
  74       IM->Material = 0;
  75       IM->MaterialMask = 0;
  76    }
  77
  78    if (IM->NormalLengthPtr)
  79       ALIGN_FREE( IM->NormalLengthPtr );
  80
  81    ALIGN_FREE( IM );
  82    freed++;
  83 /*     printf("outstanding %d\n", id - freed);    */
  84 }
  85
  86
  87 /* Cache a single allocated immediate struct.
  88  */
  89 struct immediate *_tnl_alloc_immediate( GLcontext *ctx )
  90 {
  91    TNLcontext *tnl = TNL_CONTEXT(ctx);
  92    struct immediate *tmp = tnl->freed_immediate;
  93
  94    if (tmp) {
  95       tnl->freed_immediate = 0;
  96       return tmp;
  97    }
  98    else
  99       return real_alloc_immediate( ctx );
 100 }
 101
 102 /* May be called after tnl is destroyed.
 103  */
 104 void _tnl_free_immediate( GLcontext *ctx, struct immediate *IM )
 105 {
 106    TNLcontext *tnl = TNL_CONTEXT(ctx);
 107
 108    ASSERT(IM->ref_count == 0);
 109
 110    if (IM->NormalLengthPtr) {
 111       ALIGN_FREE(IM->NormalLengthPtr);
 112       IM->NormalLengthPtr = NULL;
 113    }
 114
 115    if (!tnl) {
 116       real_free_immediate( IM );
 117    }
 118    else {
 119       if (tnl->freed_immediate)
 120          real_free_immediate( tnl->freed_immediate );
 121
 122       tnl->freed_immediate = IM;
 123    }
 124 }