reactos/dll/glu32/libnurbs/internals/trimvertpool.cc

   1 /*
   2 ** License Applicability. Except to the extent portions of this file are
   3 ** made subject to an alternative license as permitted in the SGI Free
   4 ** Software License B, Version 1.1 (the "License"), the contents of this
   5 ** file are subject only to the provisions of the License. You may not use
   6 ** this file except in compliance with the License. You may obtain a copy
   7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  12 ** Note that, as provided in the License, the Software is distributed on an
  13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  17 **
  18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  21 ** Copyright in any portions created by third parties is as indicated
  22 ** elsewhere herein. All Rights Reserved.
  23 **
  24 ** Additional Notice Provisions: The application programming interfaces
  25 ** established by SGI in conjunction with the Original Code are The
  26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  31 ** published by SGI, but has not been independently verified as being
  32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  33 */
  34
  35 /*
  36  * trimvertexpool.c++
  37  *
  38  * $Date$ $Revision: 1.1 $
  39  * $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/trimvertpool.cc,v 1.1 2004/02/02 16:39:13 navaraf Exp $
  40  */
  41
  42 #include "glimports.h"
  43 #include "myassert.h"
  44 #include "mystdio.h"
  45 #include "mystring.h"
  46 #include "trimvertex.h"
  47 #include "trimvertpool.h"
  48 #include "bufpool.h"
  49
  50 /*----------------------------------------------------------------------------
  51  * TrimVertexPool::TrimVertexPool
  52  *----------------------------------------------------------------------------
  53  */
  54 TrimVertexPool::TrimVertexPool( void )
  55         : pool( sizeof(TrimVertex)*3, 32, "Threevertspool" )
  56 {
  57     // initialize array of pointers to vertex lists
  58     nextvlistslot = 0;
  59     vlistsize = INIT_VERTLISTSIZE;
  60     vlist = new TrimVertex_p[vlistsize];
  61 }
  62
  63 /*----------------------------------------------------------------------------
  64  * TrimVertexPool::~TrimVertexPool
  65  *----------------------------------------------------------------------------
  66  */
  67 TrimVertexPool::~TrimVertexPool( void )
  68 {
  69     // free all arrays of TrimVertices vertices
  70     while( nextvlistslot ) {
  71         delete [] vlist[--nextvlistslot];
  72     }
  73
  74     // reallocate space for array of pointers to vertex lists
  75     if( vlist ) delete[] vlist;
  76 }
  77
  78 /*----------------------------------------------------------------------------
  79  * TrimVertexPool::clear
  80  *----------------------------------------------------------------------------
  81  */
  82 void
  83 TrimVertexPool::clear( void )
  84 {
  85     // reinitialize pool of 3 vertex arrays
  86     pool.clear();
  87
  88     // free all arrays of TrimVertices vertices
  89     while( nextvlistslot ) {
  90         delete [] vlist[--nextvlistslot];
  91         vlist[nextvlistslot] = 0;
  92     }
  93
  94     // reallocate space for array of pointers to vertex lists
  95     if( vlist ) delete[] vlist;
  96     vlist = new TrimVertex_p[vlistsize];
  97 }
  98
  99
 100 /*----------------------------------------------------------------------------
 101  * TrimVertexPool::get - allocate a vertex list
 102  *----------------------------------------------------------------------------
 103  */
 104 TrimVertex *
 105 TrimVertexPool::get( int n )
 106 {
 107     TrimVertex  *v;
 108     if( n == 3 ) {
 109         v = (TrimVertex *) pool.new_buffer();
 110     } else {
 111         if( nextvlistslot == vlistsize ) {
 112             vlistsize *= 2;
 113             TrimVertex_p *nvlist = new TrimVertex_p[vlistsize];
 114             memcpy( nvlist, vlist, nextvlistslot * sizeof(TrimVertex_p) );
 115             if( vlist ) delete[] vlist;
 116             vlist = nvlist;
 117         }
 118         v = vlist[nextvlistslot++] = new TrimVertex[n];
 119     }
 120     return v;
 121 }