Method Register

LuaSTGPlus/LuaWrapper.cpp:92–207

////////////////////////////////////////////////////////////////////////////////
#pragma region ColorWrapper
void ColorWrapper::Register(lua_State* L)LNOEXCEPT
{
	struct WrapperImplement
	{
		static int ARGB(lua_State* L)LNOEXCEPT
		{
			fcyColor* p = static_cast<fcyColor*>(luaL_checkudata(L, 1, TYPENAME_COLOR));
			lua_pushnumber(L, p->a);
			lua_pushnumber(L, p->r);
			lua_pushnumber(L, p->g);
			lua_pushnumber(L, p->b);
			return 4;
		}
		static int Meta_Eq(lua_State* L)LNOEXCEPT
		{
			fcyColor* pA = static_cast<fcyColor*>(luaL_checkudata(L, 1, TYPENAME_COLOR));
			fcyColor* pB = static_cast<fcyColor*>(luaL_checkudata(L, 2, TYPENAME_COLOR));
			lua_pushboolean(L, pA->argb == pB->argb);
			return 1;
		}
		static int Meta_Add(lua_State* L)LNOEXCEPT
		{
			fcyColor* pA = static_cast<fcyColor*>(luaL_checkudata(L, 1, TYPENAME_COLOR));
			fcyColor* pB = static_cast<fcyColor*>(luaL_checkudata(L, 2, TYPENAME_COLOR));
			fcyColor* pResult = CreateAndPush(L);
			pResult->Set(
				::min((int)pA->a + pB->a, 255),
				::min((int)pA->r + pB->r, 255),
				::min((int)pA->g + pB->g, 255),
				::min((int)pA->b + pB->b, 255)
			);
			return 1;
		}
		static int Meta_Sub(lua_State* L)LNOEXCEPT
		{
			fcyColor* pA = static_cast<fcyColor*>(luaL_checkudata(L, 1, TYPENAME_COLOR));
			fcyColor* pB = static_cast<fcyColor*>(luaL_checkudata(L, 2, TYPENAME_COLOR));
			fcyColor* pResult = CreateAndPush(L);
			pResult->Set(
				::max((int)pA->a - pB->a, 0),
				::max((int)pA->r - pB->r, 0),
				::max((int)pA->g - pB->g, 0),
				::max((int)pA->b - pB->b, 0)
			);
			return 1;
		}
		static int Meta_Mul(lua_State* L)LNOEXCEPT
		{
			lua_Number tFactor;
			fcyColor *p = nullptr, *pResult = nullptr;
			if (lua_isnumber(L, 1))  // arg1为数字，则arg2必为lstgColor
			{
				tFactor = luaL_checknumber(L, 1);
				p = static_cast<fcyColor*>(luaL_checkudata(L, 2, TYPENAME_COLOR));
			}
			else if (lua_isnumber(L, 2))  // arg2为数字，则arg1必为lstgColor
			{
				tFactor = luaL_checknumber(L, 2);