source/select.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <GL/gl.h>
   9 #include "except.h"
  10 #include "select.h"
  11
  12 using namespace std;
  13
  14 namespace {
  15
  16 using namespace Msp::GL;
  17
  18 vector<SelectRecord> *select_buf=0;
  19 vector<uint> select_buf_int;
  20
  21 }
  22
  23 namespace Msp {
  24 namespace GL {
  25
  26 void select_buffer(vector<SelectRecord> &buf)
  27 {
  28         select_buf_int.resize(1024);
  29         glSelectBuffer(select_buf_int.size(), &select_buf_int[0]);
  30         select_buf=&buf;
  31 }
  32
  33 void parse_select_records(const uint *buf, uint count, vector<SelectRecord> &tbuf)
  34 {
  35         uint i=0;
  36         while(count--)
  37         {
  38                 SelectRecord record;
  39
  40                 uint n_names=buf[i++];
  41                 record.min_depth=buf[i++];
  42                 record.max_depth=buf[i++];
  43
  44                 record.names.reserve(n_names);
  45                 while(n_names--)
  46                         record.names.push_back(buf[i++]);
  47
  48                 tbuf.push_back(record);
  49         }
  50 }
  51
  52 void _parse_internal_select_records(uint count)
  53 {
  54         if(!select_buf)
  55                 throw InvalidState("No select buffer specified");
  56         parse_select_records(&select_buf_int[0], count, *select_buf);
  57 }
  58
  59 } // namespace GL
  60 } // namespace Msp