Lua functions

Typedefs
typedef lraspi_Font **	lua_Font
typedef lraspi_Colour **	lua_Colour

Functions
void	lraspi_openlibs (lua_State *L)
	Opens default LRaspi libraries. More...
void	lraspi_dofile (lua_State *L, const char *path)
	Opens a lua file. More...
void	lraspi_newobject (lua_State *L, const char *objname, const luaL_Reg methods[])
	Creates a new metatable that represents an object. More...
void	lraspi_pushfont (lua_State *L, lraspi_Font *font)
	Pushes a font object onto the stack. More...
lua_Font	lraspi_checkfont (lua_State *L, int narg)
	Checks whether the function argument narg is a font object. More...
lua_Font	lraspi_optfont (lua_State *L, int arg, lua_Font d)
	If the function argument arg is a font object, return this font. If this argument is absent or is nil, return d. Otherwise, raises an error. More...
void	lraspi_pushcolour (lua_State *L, lraspi_Colour *colour)
	Pushes a colour object onto the stack. More...
lua_Colour	lraspi_checkcolour (lua_State *L, int narg)
	Checks whether the function argument narg is a colour object. More...
lua_Colour	lraspi_optcolour (lua_State *L, int arg, lua_Colour d)
	If the function argument arg is a colour object, return this colour. If the argument is absent or is nil, return d. Otherwise, raises an error. More...

Detailed Description

Functions to extends Lua.

Typedef Documentation

lua_Colour

typedef lraspi_Colour** lua_Colour

Defines a colour type

lua_Font

typedef lraspi_Font** lua_Font

Defines a font type

Function Documentation

lraspi_checkcolour()

lua_Colour lraspi_checkcolour	(	lua_State *	L,
		int	narg
	)

Checks whether the function argument narg is a colour object.

Parameters

L	A Lua state.
narg	The position of the argument.

Returns

A font object.

lraspi_checkfont()

lua_Font lraspi_checkfont	(	lua_State *	L,
		int	narg
	)

Checks whether the function argument narg is a font object.

Parameters

L	A Lua state.
narg	The position of the argument.

Returns

A font object.

lraspi_dofile()

void lraspi_dofile	(	lua_State *	L,
		const char *	path
	)

Opens a lua file.

Parameters

L	A Lua state.
path	The path of the lua file.

lraspi_newobject()

void lraspi_newobject	(	lua_State *	L,
		const char *	objname,
		const luaL_Reg	methods[]
	)

Creates a new metatable that represents an object.

Parameters

L	A Lua state.
objname	The name of the object.
methods	The methods that contains the object.

lraspi_openlibs()

void lraspi_openlibs

(

lua_State *

L

)

Opens default LRaspi libraries.

Parameters

L	A Lua state.

lraspi_optcolour()

lua_Colour lraspi_optcolour	(	lua_State *	L,
		int	arg,
		lua_Colour	d
	)

If the function argument arg is a colour object, return this colour. If the argument is absent or is nil, return d. Otherwise, raises an error.

Parameters

L	A Lua state.
arg	The position of the argument.
d	The default value if the argument is absent or nil.

Returns

A colour object.

lraspi_optfont()

lua_Font lraspi_optfont	(	lua_State *	L,
		int	arg,
		lua_Font	d
	)

If the function argument arg is a font object, return this font. If this argument is absent or is nil, return d. Otherwise, raises an error.

Parameters

L	A Lua state.
arg	The position of the argument.
d	The default value if the argument is absent or nil.

Returns

A font object.

lraspi_pushcolour()

void lraspi_pushcolour	(	lua_State *	L,
		lraspi_Colour *	colour
	)

Pushes a colour object onto the stack.

Parameters

L	A Lua state.
colour	A colour object.

lraspi_pushfont()

void lraspi_pushfont	(	lua_State *	L,
		lraspi_Font *	font
	)

Pushes a font object onto the stack.

Parameters

L	A Lua state.
font	A font object.