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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "LuaRBOs.h"
#include "LuaInclude.h"
#include "LuaHandle.h"
#include "LuaHashString.h"
#include "LuaUtils.h"
/******************************************************************************/
/******************************************************************************/
LuaRBOs::LuaRBOs()
{
}
LuaRBOs::~LuaRBOs()
{
set<RBO*>::const_iterator it;
for (it = rbos.begin(); it != rbos.end(); ++it) {
const RBO* rbo = *it;
glDeleteRenderbuffersEXT(1, &rbo->id);
}
}
/******************************************************************************/
/******************************************************************************/
bool LuaRBOs::PushEntries(lua_State* L)
{
CreateMetatable(L);
#define REGISTER_LUA_CFUNC(x) \
lua_pushstring(L, #x); \
lua_pushcfunction(L, x); \
lua_rawset(L, -3)
REGISTER_LUA_CFUNC(CreateRBO);
REGISTER_LUA_CFUNC(DeleteRBO);
return true;
}
bool LuaRBOs::CreateMetatable(lua_State* L)
{
luaL_newmetatable(L, "RBO");
HSTR_PUSH_CFUNC(L, "__gc", meta_gc);
HSTR_PUSH_CFUNC(L, "__index", meta_index);
HSTR_PUSH_CFUNC(L, "__newindex", meta_newindex);
lua_pop(L, 1);
return true;
}
/******************************************************************************/
/******************************************************************************/
const LuaRBOs::RBO* LuaRBOs::GetLuaRBO(lua_State* L, int index)
{
return static_cast<RBO*>(LuaUtils::GetUserData(L, index, "RBO"));
}
/******************************************************************************/
/******************************************************************************/
void LuaRBOs::RBO::Init()
{
id = 0;
target = GL_RENDERBUFFER_EXT;
format = GL_RGBA;
xsize = 0;
ysize = 0;
}
void LuaRBOs::RBO::Free(lua_State* L)
{
if (id == 0) {
return;
}
glDeleteRenderbuffersEXT(1, &id);
id = 0;
CLuaHandle::GetActiveRBOs(L).rbos.erase(this);
}
/******************************************************************************/
/******************************************************************************/
int LuaRBOs::meta_gc(lua_State* L)
{
RBO* rbo = static_cast<RBO*>(luaL_checkudata(L, 1, "RBO"));
rbo->Free(L);
return 0;
}
int LuaRBOs::meta_index(lua_State* L)
{
const RBO* rbo = static_cast<RBO*>(luaL_checkudata(L, 1, "RBO"));
const string key = luaL_checkstring(L, 2);
if (key == "valid") {
lua_pushboolean(L, glIsRenderbufferEXT(rbo->id));
}
else if (key == "target") { lua_pushnumber(L, rbo->target); }
else if (key == "format") { lua_pushnumber(L, rbo->format); }
else if (key == "xsize") { lua_pushnumber(L, rbo->xsize); }
else if (key == "ysize") { lua_pushnumber(L, rbo->ysize); }
else {
return 0;
}
return 1;
}
int LuaRBOs::meta_newindex(lua_State* L)
{
return 0;
}
/******************************************************************************/
/******************************************************************************/
int LuaRBOs::CreateRBO(lua_State* L)
{
RBO rbo;
rbo.Init();
rbo.xsize = (GLsizei)luaL_checknumber(L, 1);
rbo.ysize = (GLsizei)luaL_checknumber(L, 2);
rbo.target = GL_RENDERBUFFER_EXT;
rbo.format = GL_RGBA;
const int table = 3;
if (lua_istable(L, table)) {
lua_getfield(L, table, "target");
if (lua_isnumber(L, -1)) {
rbo.target = (GLenum)lua_tonumber(L, -1);
}
lua_pop(L, 1);
lua_getfield(L, table, "format");
if (lua_isnumber(L, -1)) {
rbo.format = (GLenum)lua_tonumber(L, -1);
}
lua_pop(L, 1);
}
glGenRenderbuffersEXT(1, &rbo.id);
glBindRenderbufferEXT(rbo.target, rbo.id);
// allocate the memory
glRenderbufferStorageEXT(rbo.target, rbo.format, rbo.xsize, rbo.ysize);
glBindRenderbufferEXT(rbo.target, 0);
RBO* rboPtr = static_cast<RBO*>(lua_newuserdata(L, sizeof(RBO)));
*rboPtr = rbo;
luaL_getmetatable(L, "RBO");
lua_setmetatable(L, -2);
if (rboPtr->id != 0) {
CLuaHandle::GetActiveRBOs(L).rbos.insert(rboPtr);
}
return 1;
}
int LuaRBOs::DeleteRBO(lua_State* L)
{
if (lua_isnil(L, 1)) {
return 0;
}
RBO* rbo = static_cast<RBO*>(luaL_checkudata(L, 1, "RBO"));
rbo->Free(L);
return 0;
}
/******************************************************************************/
/******************************************************************************/
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