dll/opengl/mesa/src/glu/sgi/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  */
  39
  40 #include "glimports.h"
  41 #include "myassert.h"
  42 #include "mystdio.h"
  43 #include "mystring.h"
  44 #include "trimvertex.h"
  45 #include "trimvertpool.h"
  46 #include "bufpool.h"
  47
  48 /*----------------------------------------------------------------------------
  49  * TrimVertexPool::TrimVertexPool
  50  *----------------------------------------------------------------------------
  51  */
  52 TrimVertexPool::TrimVertexPool( void )
  53         : pool( sizeof(TrimVertex)*3, 32, "Threevertspool" )
  54 {
  55     // initialize array of pointers to vertex lists
  56     nextvlistslot = 0;
  57     vlistsize = INIT_VERTLISTSIZE;
  58     vlist = new TrimVertex_p[vlistsize];
  59 }
  60
  61 /*----------------------------------------------------------------------------
  62  * TrimVertexPool::~TrimVertexPool
  63  *----------------------------------------------------------------------------
  64  */
  65 TrimVertexPool::~TrimVertexPool( void )
  66 {
  67     // free all arrays of TrimVertices vertices
  68     while( nextvlistslot ) {
  69         delete [] vlist[--nextvlistslot];
  70     }
  71
  72     // reallocate space for array of pointers to vertex lists
  73     if( vlist ) delete[] vlist;
  74 }
  75
  76 /*----------------------------------------------------------------------------
  77  * TrimVertexPool::clear
  78  *----------------------------------------------------------------------------
  79  */
  80 void
  81 TrimVertexPool::clear( void )
  82 {
  83     // reinitialize pool of 3 vertex arrays
  84     pool.clear();
  85
  86     // free all arrays of TrimVertices vertices
  87     while( nextvlistslot ) {
  88         delete [] vlist[--nextvlistslot];
  89         vlist[nextvlistslot] = 0;
  90     }
  91
  92     // reallocate space for array of pointers to vertex lists
  93     if( vlist ) delete[] vlist;
  94     vlist = new TrimVertex_p[vlistsize];
  95 }
  96
  97
  98 /*----------------------------------------------------------------------------
  99  * TrimVertexPool::get - allocate a vertex list
 100  *----------------------------------------------------------------------------
 101  */
 102 TrimVertex *
 103 TrimVertexPool::get( int n )
 104 {
 105     TrimVertex  *v;
 106     if( n == 3 ) {
 107         v = (TrimVertex *) pool.new_buffer();
 108     } else {
 109         if( nextvlistslot == vlistsize ) {
 110             vlistsize *= 2;
 111             TrimVertex_p *nvlist = new TrimVertex_p[vlistsize];
 112             memcpy( nvlist, vlist, nextvlistslot * sizeof(TrimVertex_p) );
 113             if( vlist ) delete[] vlist;
 114             vlist = nvlist;
 115         }
 116         v = vlist[nextvlistslot++] = new TrimVertex[n];
 117     }
 118     return v;
 119 }