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 "except.h"
   9 #include "gl.h"
  10 #include "select.h"
  11
  12 using namespace std;
  13
  14 namespace {
  15
  16 vector<Msp::GL::SelectRecord> *select_buf = 0;
  17 vector<unsigned> select_buf_int;
  18
  19 }
  20
  21 namespace Msp {
  22 namespace GL {
  23
  24 void select_buffer(vector<SelectRecord> &buf)
  25 {
  26         select_buf_int.resize(1024);
  27         glSelectBuffer(select_buf_int.size(), &select_buf_int[0]);
  28         select_buf = &buf;
  29 }
  30
  31 void init_names()
  32 {
  33         glInitNames();
  34 }
  35
  36 void push_name(unsigned n)
  37 {
  38         glPushName(n);
  39 }
  40
  41 void pop_name()
  42 {
  43         glPopName();
  44 }
  45
  46 void load_name(unsigned n)
  47 {
  48         glLoadName(n);
  49 }
  50
  51 void parse_select_records(const unsigned *buf, unsigned count, vector<SelectRecord> &tbuf)
  52 {
  53         unsigned i = 0;
  54         while(count--)
  55         {
  56                 SelectRecord record;
  57
  58                 unsigned n_names = buf[i++];
  59                 record.min_depth = buf[i++];
  60                 record.max_depth = buf[i++];
  61
  62                 record.names.reserve(n_names);
  63                 while(n_names--)
  64                         record.names.push_back(buf[i++]);
  65
  66                 tbuf.push_back(record);
  67         }
  68 }
  69
  70 void _parse_internal_select_records(unsigned count)
  71 {
  72         if(!select_buf)
  73                 throw InvalidState("No select buffer specified");
  74         parse_select_records(&select_buf_int[0], count, *select_buf);
  75 }
  76
  77 } // namespace GL
  78 } // namespace Msp