Gui functions

Gui functions are only valid in callback onPaint(). Beware, option Video > OSD > Lua needs to be checked to show any lua draw function. In all gui functions, colors are coded in a single 32-bit unsigned integer as followed: 0xaarrggbb.

gui.resolution

(number width, number height) gui.resolution()

Returns the width and height of game window.

gui.text

none gui.text(Number x, Number y, String text, [Number color = 0xffffffff], [Number anchor_x = 0], [Number anchor_y = 0], [Number font_size = 16], [Number monospace = false])

Draws text string text at position (x, y). The text will be colored using color color and size of font_size. The part of the text string that is positioned at (x, y) is determined by anchor_x and anchor_y values that are bound between 0 and 1. For example, setting anchor_x = 0 (default value) will print left-aligned text and anchor_x = 1 will print right-aligned text. If monospace is set to a non-zero value, a monospace font will be used instead of the regular font.

gui.window

none gui.window(Number x, Number y, String id, String text)

Draws an ImGui window containing the text string text at position (x, y). The text can contain newline characters.

If id is empty, the window will appear without any decoration and will be fixed. If id is non-empty, the window will appear with a title, and can be moved freely by the user. In that case, the (x, y) position is interpreted as startup position.

When displaying multiple windows, you must use unique ids (when not empty).

gui.pixel

none gui.pixel(Number x, Number y, [Number color = 0xffffffff])

Draws pixel at (x,y) using color color.

gui.line

none gui.line(Number x0, Number y0, Number x1, Number y1, [Number color = 0xffffffff])

Draws an antialiased line starting from (x0,y0) to (x1,y1), and colored with color color.

gui.rectangle

none gui.rectangle(Number x, Number y, Number w, Number h, [Number thickness = 1], [Number color = 0xffffffff], [Number filled = 0])

Draws rectangle of size (w,h) with top-left corner at (x,y). Outline is of thickness thickness and is colored with color color. If filled is true, the rectangle is filled with the same color.

gui.quad

none gui.ellipse(Number x0, Number y0, Number x1, Number y1, Number x2, Number y2, Number x3, Number y3, [Number thickness = 1], [Number color = 0xffffffff], [Number filled = 0])

Draws a quad that goes through the four points (x0,y0), (x1,y1), (x2,y2), (x3,y3). Outline is of thickness thickness and is colored with color color. If filled is true, the quad is filled with the same color.

gui.ellipse

none gui.ellipse(Number center_x, Number center_y, Number radius_x, Number radius_y, [Number thickness = 1], [Number color = 0xffffffff], [Number filled = 0])

Draws an antialiased ellipse whose center is (center_x,center_y), radius along x-axis is radius_x and radius along y-axis is radius_y, colored with color color.

Input functions

All the functions in this section are only valid inside onInput() callback. Here are the indices of the different controls:

Index Mouse button Controller button Controller axis Flag
0 Left A Left stick X Restart
1 Middle B Left stick Y Joy1 added
2 Right X Right stick X Joy2 added
3 X1 Y Right stick Y Joy3 added
4 X2 Select / Back Left trigger Joy4 added
5   Guide Right trigger Joy1 removed
6   Start   Joy2 removed
7   Left stick   Joy3 removed
8   Right stick   Joy4 removed
9   Left shoulder    
10   Right shoulder    
11   Dpad up    
12   Dpad down    
13   Dpad left    
14   Dpad right    

input.clear

none input.clear()

Clear the current inputs to default values.

input.setKey

none input.setKey(Number keysym, Number state)

Set the specified keysym to the state released (0) or pressed (anything else).

input.getKey

Number input.getKey(Number keysym)

Returns the state of the specified keysym (0: released, 1: pressed).

input.setMouseCoords

none input.setMouseCoords(Number x, Number y, Number mode)

Set the mouse pointer coordinates and mode (0: absolute, 1: relative).

input.getMouseCoords

(Number x, Number y, Number mode) input.getMouseCoords()

Returns the mouse pointer coordinates and mode (0: absolute, 1: relative).

input.setMouseButtons

none input.setMouseButtons(Number button, Number state)

Set the mouse specified button to state released (0) or pressed (anything else).

input.getMouseButtons

Number input.getMouseButtons(Number button)

Returns the mouse state of specified button (0: released, 1: pressed).

input.setControllerButton

none input.setControllerButton(Number controller, Number button, Number state)

Set the button button of controller controller to state released (0) or pressed (anything else).

input.getControllerButton

Number input.getControllerButton(Number controller, Number button)

Returns the state of specified controller button (0: released, 1: pressed).

input.setControllerAxis

none input.setControllerAxis(Number controller, Number button, Number value)

Set the axis axis of controller controller to specified value (accepted range -32768 to 32767).

input.getControllerAxis

Number input.getControllerAxis(Number controller, Number button)

Returns the value of specified controller axis.

input.setFlag

none input.setFlag(Number flag, Number state)

Set the specified flag to the state cleared (0) or set (anything else).

input.getFlag

Number input.getFlag(Number flag)

Returns the state of the specified flag (0: cleared, 1: set).

input.setFramerate

none input.setFramerate(Number num, Number den)

Set the framerate numerator (num) and denominator (den).

input.getFramerate

(Number num, Number den) input.getFramerate()

Returns the framerate numerator (num) and denominator (den).

input.setRealtime

none input.setRealtime(Number sec, Number nsec)

Set the realtime in seconds (sec) and nanoseconds (nsec) (since 19700101T000000Z).

input.getRealtime

(Number sec, Number nsec) input.getRealtime()

Returns the realtime seconds (sec) and nanoseconds (nsec) (since 19700101T000000Z).

Memory functions

memory.readu8 / memory.readu16 / memory.readu32 / memory.readu64

Number memory.readu8(Number address)
Number memory.readu16(Number address)
Number memory.readu32(Number address)
Number memory.readu64(Number address)

Returns the unsigned value read from address address (any error returns 0).

memory.reads8 / memory.reads16 / memory.reads32 / memory.reads64

Number memory.reads8(Number address)
Number memory.reads16(Number address)
Number memory.reads32(Number address)
Number memory.reads64(Number address)

Returns the signed value read from address address (any error returns 0).

memory.readf / memory.readd

Number memory.readf(Number address)
Number memory.readd(Number address)

Returns the float/double value read from address address (any error returns 0).

memory.readcstring

String memory.readcstring(Number address, Number max_size)

Returns a string read from the null-terminated string located at address address which has a length less that max_size.

memory.write8 / memory.write16 / memory.write32 / memory.write64

None memory.write8(Number address, Number value)
None memory.write16(Number address, Number value)
None memory.write32(Number address, Number value)
None memory.write64(Number address, Number value)

Writes the value value to address address.

memory.writef / memory.writed

None memory.writef(Number address, Number value)
None memory.writed(Number address, Number value)

Writes the value value to address address.

memory.baseAddress

Number memory.baseAddress(String file)

Returns the base address of the file mapped in memory whose name is file. The file can either be specified as absolute path, or the filename. Returns 0 if the file could not be found.

Movie functions

movie.currentFrame

Number movie.currentFrame()

Returns the current frame number.

movie.frameCount

Number movie.frameCount()

Returns the number of frames in the movie, or -1 if no movie is loaded

movie.status

Number movie.status()

Returns the recording status of the movie:

  • 0: no movie is loaded
  • 1: movie is in recording mode
  • 2: movie is in playback mode

movie.time

(Number seconds, Number nseconds) movie.time()

Returns the elapsed time since the game startup. seconds is in whole seconds and nseconds is the number of nanoseconds.

movie.rerecords

Number movie.rerecords()

Returns the current rerecord count of the movie, or -1 if no movie is loaded

movie.isDraw

Number movie.isDraw()

Returns 1 of the current frame is a draw frame, or 0 if not.

Runtime functions

Runtime functions must be performed in callback onFrame() to be effective on the current frame.

runtime.saveState

none runtime.saveState(Number slot)

Save a state in slot number slot (must be between 1 and 10). Beware, savestate operations are registered but not executed instantly, they will be performed after this callback.

runtime.loadState

none runtime.loadState(Number slot)

Load a state in slot number slot (must be between 1 and 10). The loading behaviour depends on the status of the current movie. Beware, savestate operations are registered but not executed instantly, they will be performed after this callback.

runtime.isFastForward

Number runtime.isFastForward()

Returns if fast-forward is checked.

runtime.setFastForward

none runtime.setFastForward(Number ff)

Set the fast-forward status.

runtime.sleepMS

none runtime.sleepMS(Number length)

Sleep for length milliseconds.

Callbacks

callback.onStartup

None callback.onStartup(Function f)

Registers f to be called when the game has started, before the end of the first frame.

callback.onInput

None callback.onInput(Function f)

Registers f to be called when input for the current frame is decided. Change the movie input if in recording mode. Not called when movie is in playback mode.

callback.onFrame

None callback.onFrame(Function f)

Registers f to be called after frame has completed.

callback.onPaint

None callback.onPaint(Function f)

Registers f to be called at the end of the frame before the screen rendering is performed. Beware, if the current frame is a non-draw frame, or if the current frame rendering is skipped due to fast-forward, the callback is not called, to improve fast-forward efficiency. All Gui functions must be executed inside this callback. To include Lua draws in encodes, Video > OSD > OSD on video encode can be checked.

Callbacks (obsolete)

The old callback method consists on defining functions with specific names above, which will be called at specific moments during the game execution.

onStartup

Called when the game has started, before the end of the first frame.

onInput

Called when input for the current frame is decided. Change the movie input if in recording mode. Not called when movie is in playback mode.

onFrame

Called just as the current frame has completed. All runtime functions must be executed here if you want them to be executed on the current frame.

onPaint

Called at the end of the frame before the screen rendering is performed. All Gui functions must be executed inside this callback. To include Lua draws in encodes, Video > OSD > OSD on video encode can be checked.