Pokitto + Lua example

main.cpp

#include <Pokitto.h>
#include <cstdlib>

#define LUA_32BITS
#include <lua.hpp>

#include "PokittoLua.h"

const char * Program =
"Pokitto_Display_setColor(1);"
"Pokitto_Display_fillRect(10, 10, 40, 50);";

int main ()
{
	using Pokitto::Core;

	Core::begin();

	lua_State * state = luaL_newstate();
	loadPokittoLua(state);

	while (Core::isRunning())
	{
		if (Core::update())
		{
			auto status = luaL_loadstring(state, Program);
			if (status != 0)
			{
				Pokitto::Display::println("Error loading!");
				Pokitto::Display::println(lua_tostring(state, -1));
				continue;
			}
			auto result = lua_pcall(state, 0, 0, 0);
			if (result != 0)
			{
				Pokitto::Display::println("Error running!");
				Pokitto::Display::println(lua_tostring(state, -1));
				continue;
			}
		}
	}

	lua_close(state);
}

PokittoLua.cpp

#include "PokittoLua.h"

#include <Pokitto.h>
#include <cstdint>

int Pokitto_Display_getWidth(lua_State * state)
{
	lua_pushinteger(state, Pokitto::Display::getWidth());

	return 1;
}

int Pokitto_Display_getHeight(lua_State * state)
{
	lua_pushinteger(state, Pokitto::Display::getHeight());

	return 1;
}

int Pokitto_Display_setColor(lua_State * state)
{
	std::uint8_t index = static_cast<std::uint8_t>(luaL_checkinteger(state, 1));

	Pokitto::Display::setColor(index);

	return 0;
}

int Pokitto_Display_fillRect(lua_State * state)
{
	std::int16_t x = static_cast<std::int16_t>(luaL_checkinteger(state, 1));
	std::int16_t y = static_cast<std::int16_t>(luaL_checkinteger(state, 2));
	std::int16_t w = static_cast<std::int16_t>(luaL_checkinteger(state, 3));
	std::int16_t h = static_cast<std::int16_t>(luaL_checkinteger(state, 4));

	Pokitto::Display::fillRect(x, y, w, h);

	return 0;
}

#define ENTRY(f) { #f, f }

const luaL_Reg PokittoLuaFunctions[]
{
	ENTRY(Pokitto_Display_getWidth),
	ENTRY(Pokitto_Display_getHeight),
	ENTRY(Pokitto_Display_setColor),
	ENTRY(Pokitto_Display_fillRect),
};

#undef ENTRY

void loadPokittoLua(lua_State * state)
{
	for (const auto & func : PokittoLuaFunctions)
	{
		lua_pushcfunction(state, func.func);
		lua_setglobal(state, func.name);
	}
}

PokittoLua.h

#pragma once

#define LUA_32BITS
#include <lua.hpp>

void loadPokittoLua(lua_State * state);