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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef LUA_DISPLAY_LISTS_H
#define LUA_DISPLAY_LISTS_H
#include <vector>
#include <map>
#include "Rendering/GL/myGL.h"
typedef std::map<unsigned int, int> MatrixStateData;
class CLuaDisplayLists {
public:
CLuaDisplayLists()
{
active.push_back(DLdata(0));
}
~CLuaDisplayLists()
{
// free the display lists
for (int i = 0; i < (int)active.size(); i++) {
glDeleteLists(active[i].id, 1);
}
}
void Clear()
{
unused.clear();
active.clear();
active.push_back(DLdata(0));
}
unsigned int GetCount() const { return active.size(); }
GLuint GetDList(unsigned int index) const
{
if (index < active.size()) {
return active[index].id;
} else {
return 0;
}
}
MatrixStateData GetMatrixState(unsigned int index) const
{
if (index < active.size()) {
return active[index].matData;
} else {
return MatrixStateData();
}
}
unsigned int NewDList(GLuint dlist, MatrixStateData& m)
{
if (dlist == 0) {
return 0;
}
if (!unused.empty()) {
const unsigned int index = unused[unused.size() - 1];
active[index] = DLdata(dlist, m);
unused.pop_back();
return index;
}
active.push_back(DLdata(dlist, m));
return active.size() - 1;
}
void FreeDList(unsigned int index)
{
if ((index < active.size()) && (active[index].id != 0)) {
active[index] = DLdata(0);
unused.push_back(index);
}
}
private:
struct DLdata {
DLdata(int i) { id = i; }
DLdata(int i, MatrixStateData &m): id(i), matData(m) {}
GLuint id;
MatrixStateData matData;
};
std::vector<DLdata> active;
std::vector<unsigned int> unused; // references slots in active
};
#endif /* LUA_DISPLAY_LISTS_H */
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