Portaudio: Heed defaults, don't use full-duplex mode

[lsnes.git] / lua.lyx

#LyX 2.0 created this file. For more info see http://www.lyx.org/
\lyxformat 413
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\begin_body

\begin_layout Title
lsnes Lua functions reference
\end_layout

\begin_layout Section
Table of contents
\end_layout

\begin_layout Standard
\begin_inset CommandInset toc
LatexCommand tableofcontents

\end_inset


\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Special tokens
\end_layout

\begin_layout Standard
These tokens are special, and are expanded while the script is being loaded
\end_layout

\begin_layout Subsection
@@LUA_SCRIPT_FILENAME@@
\end_layout

\begin_layout Standard
Expanded to string token containing path and filename of this Lua script.
 Handy for referencing other lua scripts or resources that are relative
 to this Lua script.
\end_layout

\begin_layout Standard
In practicular, this is suitable to be passed as base argument of various
 functions like loadfile, dofile, resolve_filename, gui.bitmap_load, gui.bitmap_lo
ad_png and gui.bitmap_load_pal.
\end_layout

\begin_layout Section
Global
\end_layout

\begin_layout Subsection
print: Print values to console
\end_layout

\begin_layout Itemize
Syntax: none print(value...
 values)
\end_layout

\begin_layout Standard
Prints specified values to console.
\end_layout

\begin_layout Subsection
exec: Execute lsnes commands
\end_layout

\begin_layout Itemize
Syntax: none exec(string cmd)
\end_layout

\begin_layout Standard
Execute lsnes command <cmd>.
\end_layout

\begin_layout Subsection
utime: Get current time
\end_layout

\begin_layout Itemize
Syntax: (number,number) utime()
\end_layout

\begin_layout Standard
Returns two numbers.
 First is time since some epoch in seconds, the second is microseconds mod
 10^6 since that epoch.
\end_layout

\begin_layout Subsection
emulator_ready: Check if emulator has been fully initialized
\end_layout

\begin_layout Itemize
Syntax: boolean emulator_ready()
\end_layout

\begin_layout Standard
Returns true if emulator has finished booting, false if not (on_startup()
 will be issued later).
\end_layout

\begin_layout Subsection
set_idle_timeout: Run function after timeout when emulator is idle
\end_layout

\begin_layout Itemize
Syntax: none set_idle_timeout(number timeout)
\end_layout

\begin_layout Standard
Set number of microseconds to block idle for.
 After this timeout has expired, on_idle() will be called once.
\end_layout

\begin_layout Subsection
set_timer_timeout: Run function after timeout.
\end_layout

\begin_layout Itemize
Syntax: none set_timer_timeout(number timeout)
\end_layout

\begin_layout Standard
Set number of microseconds to block timer for.
 After this timeout has expired, on_timer() will be called once.
\end_layout

\begin_layout Subsection
bus_address: Look up address in system bus.
\end_layout

\begin_layout Itemize
Syntax: none bus_address(number bus_addr)
\end_layout

\begin_layout Standard
Returns virtual address corresponding to specified address on system bus.
\end_layout

\begin_layout Subsection
loopwrapper: Convert loop into callable function
\end_layout

\begin_layout Itemize
Syntax: function loopwrapper(function fun, ...)
\end_layout

\begin_layout Standard
Calls function <fun> with function and specified arguments.
 The function passed suspends execution until the function returned is called.
 Handy for linear flow control among multiple invocations of a hook.
 Example code:
\end_layout

\begin_layout LyX-Code
on_paint = loopwrapper(function(wait)
\end_layout

\begin_deeper
\begin_layout LyX-Code
while true do
\end_layout

\begin_deeper
\begin_layout LyX-Code
gui.text(0, 0, 
\begin_inset Quotes eld
\end_inset

Test!
\begin_inset Quotes erd
\end_inset

);
\end_layout

\begin_layout LyX-Code
wait();
\end_layout

\end_deeper
\begin_layout LyX-Code
end
\end_layout

\end_deeper
\begin_layout LyX-Code
end);
\end_layout

\begin_layout Subsection
list_bindings: List keybindings
\end_layout

\begin_layout Itemize
Syntax: table list_bindings([string cmd])
\end_layout

\begin_layout Standard
Get table of all keybindings, indexed by keyspec (modifiers|mask/key).
 If <cmd> is specified, the table is limited to that command.
 Also searches for controller keys.
\end_layout

\begin_layout Subsection
get_alias: Get expansion of alias
\end_layout

\begin_layout Itemize
Syntax: string get_alias(string aname)
\end_layout

\begin_layout Standard
Get expansion of given alias <aname>.
\end_layout

\begin_layout Subsection
set_alias: Set expansion of alias
\end_layout

\begin_layout Itemize
Syntax: none set_alias(string aname, string value)
\end_layout

\begin_layout Standard
Set expansion of given alias.
\end_layout

\begin_layout Subsection
create_ibind: Create invese binding
\end_layout

\begin_layout Itemize
Syntax: INVERSEBIND create_ibind(string name, string cmd)
\end_layout

\begin_layout Standard
Return object representing inverse binding with specified name <name> and
 specified command <cmd>.
\end_layout

\begin_layout Itemize
Note: To create press/release commands, use aliases +foo and -foo .
\end_layout

\begin_layout Itemize
Note: Keep the returned object around.
\end_layout

\begin_layout Subsection
create_command: Create a command
\end_layout

\begin_layout Itemize
Syntax: COMMANDBIND create_commmand(string name, function a)
\end_layout

\begin_layout Itemize
Syntax: COMMANDBIND create_commmand(string name, function a, function b)
\end_layout

\begin_layout Standard
Return object representing a command (pair).
\end_layout

\begin_layout Itemize
If only one function is specied, the command is level-sensitive, <a> is
 callback.
\end_layout

\begin_layout Itemize
If <b> is function, the function is edge-sensitive, <a> is positive edge
 callback and <b> is negative edge callback.
\end_layout

\begin_layout Itemize
All callbacks get single argument: The parameters passed.
\end_layout

\begin_layout Itemize
Keep the returned object around.
\end_layout

\begin_layout Subsection
loadfile: Load Lua script
\end_layout

\begin_layout Itemize
Syntax: function loadfile(string filename[, string base])
\end_layout

\begin_layout Standard
Load lua script from <filename>, resolved relative to <base> (if empty,
 current directory).
\end_layout

\begin_layout Subsection
dofile: Execute Lua script
\end_layout

\begin_layout Itemize
Syntax: function dofile(string filename[, string base])
\end_layout

\begin_layout Standard
Execute lua script from <filename>, resolved relative to <base> (if empty,
 current directory) and return all return values.
\end_layout

\begin_layout Subsection
open_file: Open a stream
\end_layout

\begin_layout Itemize
Syntax: FILEREADER open_file(string filename[, string base])
\end_layout

\begin_layout Standard
Open file <filename>, resolved relative to <base> (if empty, current directory)
 and return a handle.
\end_layout

\begin_layout Subsection
FILEREADER(): Read line/bytes from stream
\end_layout

\begin_layout Itemize
Syntax: string/nil FILEREADER()
\end_layout

\begin_layout Itemize
Syntax: string/nil FILEREADER(number bytes)
\end_layout

\begin_layout Standard
Reads next line or <bytes> bytes from specified file handle.
 On EOF, nil is returned.
\end_layout

\begin_layout Itemize
Note: The line-oriented variant reads in text mode, so CR at end of line
 is stripped.
\end_layout

\begin_layout Subsection
FILEREADER:lines: Iterator to read all lines
\end_layout

\begin_layout Itemize
Syntax: for line in <foo>:lines() do ...
 end
\end_layout

\begin_layout Standard
Iterator for reading all lines of <foo> in a loop.
\end_layout

\begin_layout Subsection
resolve_filename: Resolve name of file relative to another
\end_layout

\begin_layout Itemize
Syntax: string resolve_file(string filename, string base)
\end_layout

\begin_layout Standard
Resolve name of file <filename> relative to <base> and return the result.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table bit:
\end_layout

\begin_layout Standard
Bitwise logical functions and related.
\end_layout

\begin_layout Subsection
bit.none/bit.bnot: Bitwise none or NOT function
\end_layout

\begin_layout Itemize
Syntax: number bit.none(number...)
\end_layout

\begin_layout Itemize
Syntax: number bit.bnot(number...)
\end_layout

\begin_layout Standard
48-bit bitwise NOT / NONE function (set bits that are set in none of the
 arguments).
\end_layout

\begin_layout Subsection
bit.any/bit.bor: Bitwise any or OR function
\end_layout

\begin_layout Itemize
Syntax: number bit.any(number...)
\end_layout

\begin_layout Itemize
Syntax: number bit.bor(number...)
\end_layout

\begin_layout Standard
48-bit bitwise OR / ANY function (set bits that are set in any of the arguments).
\end_layout

\begin_layout Subsection
bit.all/bit.band: Bitwise all or AND function
\end_layout

\begin_layout Itemize
Syntax: number bit.all(number...)
\end_layout

\begin_layout Itemize
Syntax: number bit.band(number...)
\end_layout

\begin_layout Standard
48-bit bitwise AND / ALL function (set bits that are set in all of the arguments
).
\end_layout

\begin_layout Subsection
bit.parity/bit.bxor: Bitwise parity or XOR function
\end_layout

\begin_layout Itemize
Syntax: number bit.parity(number...)
\end_layout

\begin_layout Itemize
Syntax: number bit.bxor(number...)
\end_layout

\begin_layout Standard
48-bit bitwise XOR / PARITY function (set bits that are set in odd number
 of the arguments).
\end_layout

\begin_layout Subsection
bit.lrotate: Rotate a number left
\end_layout

\begin_layout Itemize
Syntax: number bit.lrotate(number base[, number amount[, number bits]])
\end_layout

\begin_layout Standard
Rotate <bits>-bit (max 48, default 48) number <base> left by <amount> (default
 1) places.
\end_layout

\begin_layout Subsection
bit.rrotate: Rotate a number right
\end_layout

\begin_layout Itemize
Syntax: number bit.rrotate(number base[, number amount[, number bits]])
\end_layout

\begin_layout Standard
Rotate <bits>-bit (max 48, default 48) number <base> right by <amount> (default
 1) places.
\end_layout

\begin_layout Subsection
bit.lshift: Shift a number left
\end_layout

\begin_layout Itemize
Syntax: number bit.lshift(number base[, number amount[, number bits]])
\end_layout

\begin_layout Standard
Shift <bits>-bit (max 48, default 48) number <base> left by <amount> (default
 1) places.
 The new bits are filled with zeroes.
\end_layout

\begin_layout Subsection
bit.lrshift: Shift a number right (logical)
\end_layout

\begin_layout Itemize
Syntax: number bit.lrshift(number base[, number amount[, number bits]])
\end_layout

\begin_layout Standard
Shift <bits>-bit (max 48, default 48) number <base> logically right by <amount>
 (default 1) places.
 The new bits are filled with zeroes.
\end_layout

\begin_layout Subsection
bit.arshift: Shift a number right (arithmetic)
\end_layout

\begin_layout Itemize
Syntax: number bit.arshift(number base[, number amount[, number bits]])
\end_layout

\begin_layout Standard
Shift <bits>-bit (max 48, default 48) number <base> logically right by <amount>
 (default 1) places.
 The new bits are shifted in with copy of the high bit.
\end_layout

\begin_layout Subsection
bit.extract: Extract/shuffle bits from number
\end_layout

\begin_layout Itemize
Syntax: number bit.extract(number base[, number bit0[, number bit1,...]])
\end_layout

\begin_layout Standard
Returns number that has bit0-th bit as bit 0, bit1-th bit as 1 and so on.
\end_layout

\begin_layout Itemize
Note: Bit numbers up to 51 should work reliably (then things start falling
 apart due to double precision issues).
\end_layout

\begin_layout Itemize
Note: There are two special bit positions, true and false, standing for
 always set bit and always clear bit.
\end_layout

\begin_layout Subsection
bit.value: Construct number with specified bits set
\end_layout

\begin_layout Itemize
Syntax: number bit.value([number bit1[, number bit2,...]])
\end_layout

\begin_layout Standard
Returns bitwise OR of 1 left shifted by <bit1> places, 1 left shifted by
 <bit2> places and so on.
 As special value, nil argument is no-op.
\end_layout

\begin_layout Subsection
bit.test_any: Test if any bit is set
\end_layout

\begin_layout Itemize
Syntax: boolean bit.test_any(number a, number b)
\end_layout

\begin_layout Standard
Returns true if bitwise and of <a> and <b> is nonzero, otherwise false.
\end_layout

\begin_layout Subsection
bit.test_all: Test if all bits are set
\end_layout

\begin_layout Itemize
Syntax: boolean bit.test_all(number a, number b)
\end_layout

\begin_layout Standard
Returns true if bitwise and of <a> and <b> equals <b>, otherwise false.
\end_layout

\begin_layout Subsection
bit.popcount: Population count
\end_layout

\begin_layout Itemize
Syntax: number bit.popcount(number a)
\end_layout

\begin_layout Standard
Returns number of set bits in <a>.
\end_layout

\begin_layout Subsection
bit.clshift: Chained left shift
\end_layout

\begin_layout Itemize
Syntax: (number, number) bit.clshift(number a, number b, [number amount,[number
 bits]])
\end_layout

\begin_layout Standard
Does chained left shift on <a>, <b> by <amount> positions (default 1), assuming
 numbers to be of specified number of bits <bits> (default 48).
\end_layout

\begin_layout Subsection
bit.crshift: Chained right shift
\end_layout

\begin_layout Itemize
Syntax: (number, number) bit.crshift(number a, number b, [number amount,[number
 bits]])
\end_layout

\begin_layout Standard
Does chained right shift on <a>, <b> by <amount> positions (default 1),
 assuming numbers to be of specified number of bits <bits> (default 48).
\end_layout

\begin_layout Subsection
bit.flagdecode: Decode bitfield into flags
\end_layout

\begin_layout Itemize
Syntax: string bit.flagdecode(number a, number bits, [string on, [string
 off]])
\end_layout

\begin_layout Standard
Return string of length bits where ith character is ith character of on
 if bit i is on, otherwise ith character of off.
 Out of range reads give last character.
\end_layout

\begin_layout Itemize
Note: <on> defaults to '*' if empty.
\end_layout

\begin_layout Itemize
Note: <off> defaults to '-' if empty.
\end_layout

\begin_layout Subsection
bit.rflagdecode: Decode bitfield into flags
\end_layout

\begin_layout Itemize
Syntax: string bit.rflagdecode(number a, number bits, [string on, [string
 off]])
\end_layout

\begin_layout Standard
Like bit.flagdecode, but outputs the string in the opposite order (most significa
nt bit first).
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table gui:
\end_layout

\begin_layout Itemize
Functions that draw to screen can only only be called in on_paint and on_video
 callbacks or if non-default render queue has been set.
\end_layout

\begin_layout Itemize
Colors are 32-bit.
 Bits 0-7 are the blue component, bits 8-15 are the green component, bits
 16-23 are the red component, bits 24-31 are alpha component (0 is fully
 opaque, 255 is almost transparent).
 -1 is the fully transparent color.
\end_layout

\begin_layout Itemize
Alpha values greater than 127 do work properly.
\end_layout

\begin_layout Itemize
Origin of coordinates is at top left corner of game display area.
 Left and top gaps correspond to negative coordinates.
\end_layout

\begin_layout Subsection
gui.resolution: Get current resolution
\end_layout

\begin_layout Itemize
Syntax: (number, number) gui.resolution()
\end_layout

\begin_layout Standard
Returns 2-tuple (hresolution, vresolution).
\end_layout

\begin_layout Subsection
gui.left_gap/gui.right_gap/gui.top_gap/gui.bottom_gap: Set edge gaps
\end_layout

\begin_layout Itemize
Syntax: number gui.left_gap(number gap)
\end_layout

\begin_layout Itemize
Syntax: number gui.right_gap(number gap)
\end_layout

\begin_layout Itemize
Syntax: number gui.top_gap(number gap)
\end_layout

\begin_layout Itemize
Syntax: number gui.bottom_gap(number gap)
\end_layout

\begin_layout Standard
Set the specified edge gap to specified value <gap> (max gap is 8191).
 If successful, old gap is returned.
\end_layout

\begin_layout Subsection
gui.delta_left_gap/gui.delta_right_gap/gui.delta_top_gap/gui.delta_bottom_gap:
 Adjust edge gaps
\end_layout

\begin_layout Itemize
Syntax: number gui.delta_left_gap(number dgap)
\end_layout

\begin_layout Itemize
Syntax: number gui.delta_right_gap(number dgap)
\end_layout

\begin_layout Itemize
Syntax: number gui.delta_top_gap(number dgap)
\end_layout

\begin_layout Itemize
Syntax: number gui.delta_bottom_gap(number dgap)
\end_layout

\begin_layout Standard
Increase the specified edge gap by specified value <dgap> (max gap is 8191)
 and return the old gap (returns nothing on error).
\end_layout

\begin_layout Subsection
gui.text/gui.textH/gui.textV,gui.textHV: Draw text
\end_layout

\begin_layout Itemize
Syntax: none gui.text(number x, number y, string text[, number fgc[, number
 bgc]])
\end_layout

\begin_layout Itemize
Syntax: none gui.textH(number x, number y, string text[, number fgc[, number
 bgc]])
\end_layout

\begin_layout Itemize
Syntax: none gui.textV(number x, number y, string text[, number fgc[, number
 bgc]])
\end_layout

\begin_layout Itemize
Syntax: none gui.textHV(number x, number y, string text[, number fgc[, number
 bgc]])
\end_layout

\begin_layout Standard
Draw specified text on the GUI (each character cell is 8 or 16 wide and
 16 high).
 Parameters:
\end_layout

\begin_layout Itemize
x: X-coordinate to start the drawing from (and x-coordinate at begining
 of the lines).
\end_layout

\begin_layout Itemize
y: Y-coordinate to start the drawing from.
\end_layout

\begin_layout Itemize
text: The text to draw.
\end_layout

\begin_layout Itemize
fgc: Text color (default is 0xFFFFFF (white))
\end_layout

\begin_layout Itemize
bgc: Background color (default is -1 (transparent))
\end_layout

\begin_layout Standard
Note: The H variants draw at double width and V variants draw at double
 height.
\end_layout

\begin_layout Subsection
gui.rectangle: Draw a rectangle
\end_layout

\begin_layout Itemize
Syntax: none gui.rectangle(number x, number y, number width, number height[,
 number thickness[, number outline[, number fill]]])
\end_layout

\begin_layout Standard
Draw rectangle on the GUI.
 Parameters:
\end_layout

\begin_layout Itemize
x: X-coordinate of left edge.
\end_layout

\begin_layout Itemize
y: Y-coordinate of upper edge.
\end_layout

\begin_layout Itemize
width: Width of rectangle.
\end_layout

\begin_layout Itemize
height: Height of rectangle.
\end_layout

\begin_layout Itemize
thickness: Thickness of outline (default is 1).
\end_layout

\begin_layout Itemize
outline: Color of outline (default is 0xFFFFFF (white))
\end_layout

\begin_layout Itemize
fill: Color of fill (default is -1 (transparent))
\end_layout

\begin_layout Subsection
gui.box: Draw a 3D-effect box
\end_layout

\begin_layout Itemize
Syntax: none gui.box(number x, number y, number width, number height[, number
 thickness[, number outline1[,number outline2[, number fill]]]])
\end_layout

\begin_layout Standard
Draw rectangle with 3D effect on the GUI.
 Parameters:
\end_layout

\begin_layout Itemize
x: X-coordinate of left edge.
\end_layout

\begin_layout Itemize
y: Y-coordinate of upper edge.
\end_layout

\begin_layout Itemize
width: Width of rectangle.
\end_layout

\begin_layout Itemize
height: Height of rectangle.
\end_layout

\begin_layout Itemize
thickness: Thickness of outline (default is 1).
\end_layout

\begin_layout Itemize
outline1: First color of outline (default is 0xFFFFFF (white))
\end_layout

\begin_layout Itemize
outline2: First color of outline (default is 0x808080 (dark gray))
\end_layout

\begin_layout Itemize
fill: Color of fill (default is 0xC0C0C0 (light grayy))
\end_layout

\begin_layout Subsection
gui.pixel: Draw a single pixel
\end_layout

\begin_layout Itemize
Syntax: none gui.pixel(number x, number y[, number color])
\end_layout

\begin_layout Standard
Draw one pixel on the GUI.
 Parameters:
\end_layout

\begin_layout Itemize
x: X-coordinate of the pixel
\end_layout

\begin_layout Itemize
y: Y-coordinate of the pixel
\end_layout

\begin_layout Itemize
color: Color of the pixel (default is 0xFFFFFF (white))
\end_layout

\begin_layout Subsection
gui.crosshair: Draw a crosshair
\end_layout

\begin_layout Itemize
Syntax: none gui.crosshair(number x, number y[, number length[, number color]])
\end_layout

\begin_layout Standard
Draw a crosshair.
 Parameters:
\end_layout

\begin_layout Itemize
x: X-coordinate of the crosshair
\end_layout

\begin_layout Itemize
y: Y-coordinate of the crosshair
\end_layout

\begin_layout Itemize
length: Length of the crosshair lines (default 10).
\end_layout

\begin_layout Itemize
color: Color of the crosshair (default is 0xFFFFFF (white))
\end_layout

\begin_layout Subsection
gui.line: Draw a line
\end_layout

\begin_layout Itemize
Syntax: none gui.line(number x1, number y1, number x2, number y2[, number
 color])
\end_layout

\begin_layout Standard
Draw a thin line.
 Parameters:
\end_layout

\begin_layout Itemize
x1: X-coordinate of one end.
\end_layout

\begin_layout Itemize
y1: Y-coordinate of one end.
\end_layout

\begin_layout Itemize
x2: X-coordinate of the other end.
\end_layout

\begin_layout Itemize
y2: Y-coordinate of the other end.
\end_layout

\begin_layout Itemize
color: Color of the line (default is 0xFFFFFF (white)).
\end_layout

\begin_layout Subsection
gui.circle: Draw a (filled) circle
\end_layout

\begin_layout Itemize
Syntax: none gui.circle(number x, number y, number r[, number thick[, number
 border[, number fil]]])
\end_layout

\begin_layout Standard
Draw a circle.
 Parameters.
\end_layout

\begin_layout Itemize
x: X-coordinate of the center
\end_layout

\begin_layout Itemize
y: Y-coordinate of the center
\end_layout

\begin_layout Itemize
r: The radius of the circle
\end_layout

\begin_layout Itemize
thick: Border thickness
\end_layout

\begin_layout Itemize
border: Border color (default is 0xFFFFFF (white))
\end_layout

\begin_layout Itemize
fill: Fill color (default is -1 (transparent)).
\end_layout

\begin_layout Subsection
gui.bitmap_draw: Draw a bitmap
\end_layout

\begin_layout Itemize
Syntax: none gui.bitmap_draw(number x, number y, BITMAP bitmap, PALETTE palette)
\end_layout

\begin_layout Itemize
Syntax: none gui.bitmap_draw(number x, number y, DBITMAP bitmap)
\end_layout

\begin_layout Standard
Draw a bitmap <bitmap> on screen with specified palette <palette> (if bitmap
 is paletted) .
 Parameters:
\end_layout

\begin_layout Itemize
x: X-coordinate of left edge.
\end_layout

\begin_layout Itemize
y: Y-coordinate of top edge.
\end_layout

\begin_layout Itemize
bitmap: The bitmap to draw
\end_layout

\begin_layout Itemize
palette: The palette to draw the bitmap using.
\end_layout

\begin_layout Subsection
gui.palette_new: Create a new palette
\end_layout

\begin_layout Itemize
Syntax: PALETTE gui.palette_new()
\end_layout

\begin_layout Standard
Returns a new palette (initially all transparent).
 
\end_layout

\begin_layout Subsection
gui.bitmap_new: Create a new bitmap
\end_layout

\begin_layout Itemize
Syntax: BITMAP/DBITMAP gui.bitmap_new(number w, number h, boolean direct[,
 bool icolor])
\end_layout

\begin_layout Standard
Returns a new bitmap/dbitmap.
\end_layout

\begin_layout Standard
Parameters:
\end_layout

\begin_layout Itemize
w: The width of new bitmap
\end_layout

\begin_layout Itemize
h: The height of new bitmap
\end_layout

\begin_layout Itemize
direct: If true, the returned bitmap is dbitmap, otherwise bitmap.
\end_layout

\begin_layout Itemize
icolor: Initital fill color (defaults to 0 on BITMAP, -1 on DBITMAP)
\end_layout

\begin_layout Subsection
gui.bitmap_load/gui.bitmap_load_str: Load a bitmap from file or string
\end_layout

\begin_layout Itemize
Syntax: DBITMAP/(BITMAP, PALETTE) gui.bitmap_load(string file[, string base])
\end_layout

\begin_layout Itemize
Syntax: DBITMAP/(BITMAP, PALETTE) gui.bitmap_load_str(string content)
\end_layout

\begin_layout Standard
Reads file <file> (resolved relative to <base>) or string <content> and
 returns loaded bitmap/dbitmap (if bitmap, the second return value is palette
 for bitmap).
\end_layout

\begin_layout Subsection
gui.bitmap_load_png/gui.bitmap_load_png_str: Load a bitmap from PNG
\end_layout

\begin_layout Itemize
Syntax: DBITMAP/(BITMAP, PALETTE) gui.bitmap_load_png(string file[, string
 base])
\end_layout

\begin_layout Itemize
Syntax: DBITMAP/(BITMAP, PALETTE) gui.bitmap_load_png_str(string content)
\end_layout

\begin_layout Standard
Load a bitmap from PNG file <file> (resolved relative to <base>) or BASE64
 encoded content <content>.
\end_layout

\begin_layout Itemize
If the PNG is of color type 3 (PALETTE), returns two value.
 First is BITMAP containing the image data from the PNG and second is PALETTE
 containg the palette data from the PNG.
\end_layout

\begin_layout Itemize
For color types 0 (GRAY), 2 (RGB), 4 (GRAY_ALPHA) and 6 (RGBA), returns
 one DBITMAP containg the image data loaded from the PNG.
\end_layout

\begin_layout Subsection
gui.bitmap_load_pal/gui.bitmap_load_pal_str: Load a palette
\end_layout

\begin_layout Itemize
Syntax: PALETTE gui.bitmap_load_pal(string file[, string base])
\end_layout

\begin_layout Itemize
Syntax: PALETTE gui.bitmap_load_pal_str(string content)
\end_layout

\begin_layout Standard
Load a palette from file <file>(resolved relative to <base>) or string <content>.
\end_layout

\begin_layout Itemize
The kinds of lines supported:
\end_layout

\begin_deeper
\begin_layout Itemize
Blank or just whitespace: Ignored
\end_layout

\begin_layout Itemize
First non-whitespace is '#': Ignored
\end_layout

\begin_layout Itemize
<r> <g> <b>: Fully opaque color with specified RGB values (0-255)
\end_layout

\begin_layout Itemize
<r> <g> <b> <a>: Color with specified RGB values (0-255) and specified alpha
 (0-256, 0 being fully transparent and 256 fully opaque).
\end_layout

\begin_layout Itemize
transparent: Fully transparent color
\end_layout

\end_deeper
\begin_layout Subsection
gui.palette_set: Set palette entry
\end_layout

\begin_layout Itemize
Syntax: none gui.palette_set(PALETTE palette, number index, number color)
\end_layout

\begin_layout Standard
Sets color in palette.
 Parameters:
\end_layout

\begin_layout Itemize
palette: The palette to manipulate
\end_layout

\begin_layout Itemize
index: Index of color (0-65535).
\end_layout

\begin_layout Itemize
color: The color value.
\end_layout

\begin_layout Subsection
gui.bitmap_pset: Set pixel in bitmap
\end_layout

\begin_layout Itemize
Syntax: none gui.bitmap_pset(BITMAP/DBITMAP bitmap, number x, number y, number
 color)
\end_layout

\begin_layout Standard
Sets specified pixel in bitmap.
 Parameters:
\end_layout

\begin_layout Itemize
bitmap: The bitmap to manipulate
\end_layout

\begin_layout Itemize
x: The x-coordinate of the pixel.
\end_layout

\begin_layout Itemize
y: The y-coordinate of the pixel.
\end_layout

\begin_layout Itemize
color: If bitmap is a bitmap, color index (0-65535).
 Otherwise color value.
\end_layout

\begin_layout Subsection
gui.bitmap_pget: Get pixel in bitmap
\end_layout

\begin_layout Itemize
Syntax: number gui.bitmap_pget(BITMAP/DBITMAP bitmap, number x, number y)
\end_layout

\begin_layout Standard
Gets specified pixel in bitmap.
 Parameters:
\end_layout

\begin_layout Itemize
bitmap: The bitmap to query
\end_layout

\begin_layout Itemize
x: The x-coordinate of the pixel.
\end_layout

\begin_layout Itemize
y: The y-coordinate of the pixel.
\end_layout

\begin_layout Standard
The bitmap color (color index if paletted, otherwise color value).
\end_layout

\begin_layout Subsection
gui.bitmap_size: Get size of bitmap
\end_layout

\begin_layout Itemize
Syntax: (number, number) gui.bitmap_size(BITMAP/DBITMAP bitmap)
\end_layout

\begin_layout Standard
Get size of bitmap <bitmap>.
 The first return is the width, the second is the height.
\end_layout

\begin_layout Itemize
Note: Can be used anywhere.
\end_layout

\begin_layout Subsection
gui.bitmap_blit: Blit a bitmap into another
\end_layout

\begin_layout Itemize
Syntax: none gui.bitmap_blit(BITMAP/DBITMAP dest, number dx, number dy, BITMAP/DB
ITMAP src, number sx, number sy, number w, number h[, number ck])
\end_layout

\begin_layout Standard
Blit a part of bitmap to another.
 Parameters:
\end_layout

\begin_layout Itemize
dest: Destination to blit to.
\end_layout

\begin_layout Itemize
dx: left edge of target
\end_layout

\begin_layout Itemize
dy: Top edge of target
\end_layout

\begin_layout Itemize
src: The source to blit from.
 Must be of the same type as destination.
\end_layout

\begin_layout Itemize
sx: left edge of source
\end_layout

\begin_layout Itemize
sy: Top edge of source
\end_layout

\begin_layout Itemize
w: Width of region
\end_layout

\begin_layout Itemize
h: Height of region.
\end_layout

\begin_layout Itemize
ck: Color key.
 Pixels of this color are not blitted.
\end_layout

\begin_deeper
\begin_layout Itemize
If bitmaps are bitmaps, this is color index of colorkey.
 Values outside range 0-65535 cause no key to be used as colorkey.
\end_layout

\begin_layout Itemize
If bitmaps are dbitmaps, this color value of colorkey.
\end_layout

\begin_layout Itemize
May be absent or nil for no colorkey blit.
\end_layout

\end_deeper
\begin_layout Subsection
gui.repaint: Arrange a repaint
\end_layout

\begin_layout Itemize
Syntax: none gui.repaint()
\end_layout

\begin_layout Standard
Request on_repaint() to happen as soon as possible.
\end_layout

\begin_layout Subsection
gui.subframe_update: Enable/Disable subframe updates
\end_layout

\begin_layout Itemize
Syntax: none gui.subframe_update(boolean on)
\end_layout

\begin_layout Standard
Request subframe updates (calling on_paint() on subframes) to happen (<on>=true)
 or not happen (<on>=false).
\end_layout

\begin_layout Subsection
gui.screenshot: Write a screenshot
\end_layout

\begin_layout Itemize
Syntax: none gui.screenshot(string filename)
\end_layout

\begin_layout Standard
Write PNG screenshot of the current frame (no drawings) to specified file
 <filename>.
\end_layout

\begin_layout Subsection
gui.color: Compose a color.
\end_layout

\begin_layout Itemize
Syntax: number gui.color(number r, number g, number b[, number a])
\end_layout

\begin_layout Standard
Returns color (in notation Lua scripts use) corresponding to color (<r>,<g>,<b>)
, each component in scale 0-255.
 If <a> is specified, that is alpha (0 is fully transparent, 256(sic) is
 fully opaque).
 The default alpha is 256.
\end_layout

\begin_layout Subsection
gui.status: Set status variable
\end_layout

\begin_layout Itemize
Syntax: none gui.status(string name, string value)
\end_layout

\begin_layout Standard
Set status field 
\begin_inset Quotes eld
\end_inset

L[<name>]
\begin_inset Quotes erd
\end_inset

 to <value> in status area.
\end_layout

\begin_layout Subsection
gui.rainbow: Rainbow color calculation
\end_layout

\begin_layout Itemize
Syntax: number gui.rainbow(number step, number steps[, number color])
\end_layout

\begin_layout Standard
Perform hue rotation of color <color> (default bright red), by <step> steps.
 The number of steps per full rotation is given by absolute value of <steps>.
\end_layout

\begin_layout Standard
If <steps> is negative, the rotation will be counterclockwise.
\end_layout

\begin_layout Subsection
gui.renderq_new: Create a render queue
\end_layout

\begin_layout Itemize
Syntax: RENDERQUEUE gui.renderq_new(number width, number height)
\end_layout

\begin_layout Standard
Create render queue with specified reported size and return it.
\end_layout

\begin_layout Subsection
gui.renderq_clear: Clear a render queue
\end_layout

\begin_layout Itemize
Syntax: none gui.renderq_clear(RENDERQUEUE queue)
\end_layout

\begin_layout Standard
Clear specified render queue.
\end_layout

\begin_layout Subsection
gui.renderq_set: Change active render queue
\end_layout

\begin_layout Itemize
Syntax: none gui.renderq_set(RENDERQUEUE queue)
\end_layout

\begin_layout Standard
Switch to specified render queue.
 Use nil as queue to switch to default queue.
\end_layout

\begin_layout Itemize
Note: When switched to another queue, all drawing functions work and draw
 there, even outside on_video/on_paint.
\end_layout

\begin_layout Subsection
gui.renderq_run: Run render queue
\end_layout

\begin_layout Itemize
Syntax: none gui.renderq_run(RENDERQUEUE queue)
\end_layout

\begin_layout Standard
Run specified render queue, copying the objects to current render queue.
 
\end_layout

\begin_layout Itemize
Warning: Don't try to run the current render queue.
\end_layout

\begin_layout Subsection
gui.loadfont: Load a font file
\end_layout

\begin_layout Itemize
Syntax: CUSTOMFONT gui.loadfont(string filename)
\end_layout

\begin_layout Standard
Loads font from specified file (CUSTOMFONT object).
\end_layout

\begin_layout Subsection
CUSTOMFONT(): Render text to screen
\end_layout

\begin_layout Itemize
Syntax: none CUSTOMFONT(number x, number y, string text[, number fgc[, number
 bgc[, number hlc]]])
\end_layout

\begin_layout Standard
Draw string with custom font to screen.
 The parameters are the same as in gui.text, except <hlc> is the halo color
 (default is no halo).
 
\end_layout

\begin_layout Subsection
gui.adjust_transparency: Adjust transparency of DBITMAP or PALETTE
\end_layout

\begin_layout Itemize
Syntax: none gui.adjust_transparency(DBITMAP obj, number adj)
\end_layout

\begin_layout Itemize
Syntax: none gui.adjust_transparency(PALETTE obj, number adj)
\end_layout

\begin_layout Standard
Multiply alpha channel of <obj> by <adj>/256.
 Useful for making 
\begin_inset Quotes eld
\end_inset

ghosts
\begin_inset Quotes erd
\end_inset

 out of solid bitmaps.
\end_layout

\begin_layout Subsection
gui.kill_frame: Kill video frame and associated sound
\end_layout

\begin_layout Itemize
Syntax: none gui.kill_frame()
\end_layout

\begin_layout Standard
Kills the currently dumped video frame + the associated sound.
 Only valid in on_video callback.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
table input
\end_layout

\begin_layout Standard
Input handling.
 Functions manipulating input are only available in on_input callback.
\end_layout

\begin_layout Subsection
input.get: Read controller button/axis (deprecated)
\end_layout

\begin_layout Itemize
Syntax: number input.get(number controller, number index)
\end_layout

\begin_layout Standard
Read the specified index <index> (zero-based) from specified controller
 <controller> (zero-based).
 
\end_layout

\begin_layout Subsection
input.set: Write controller button/axis (deprecated)
\end_layout

\begin_layout Itemize
Syntax: none input.set(number controller, number index, number value)
\end_layout

\begin_layout Standard
Write the specified index <index> (zero-based) from specified controller
 <controller> (zero-based), storing value <value>.
\end_layout

\begin_layout Subsection
input.get2: Read controller button/axis
\end_layout

\begin_layout Itemize
Syntax: number input.get2(number port, number controller, number index)
\end_layout

\begin_layout Standard
Read the specified input tuple.
 Port 0 is system port.
\end_layout

\begin_layout Subsection
input.set2: Write controller button/axis
\end_layout

\begin_layout Itemize
Syntax: input.set2(number port, number controller, number index, number value)
\end_layout

\begin_layout Standard
Write the specified input tuple.
 Port 0 is system port.
\end_layout

\begin_layout Subsection
input.lcid_to_pcid2: Look up logical controller
\end_layout

\begin_layout Itemize
Syntax: (number, number) input.lcid_to_pcid2(number lcid)
\end_layout

\begin_layout Standard
Look up physical pcid pair (port, controller) corresponding to specified
 logical controller (1-based).
 Returns nothing if controller does not exist.
\end_layout

\begin_layout Subsection
input.port_type: Look up port type
\end_layout

\begin_layout Itemize
Syntax: string input.port_type(number port)
\end_layout

\begin_layout Standard
Return type of specified port.
\end_layout

\begin_layout Subsection
input.controller_info: Get information about controller
\end_layout

\begin_layout Itemize
Syntax: table input.controller_info(number port, number controller)
\end_layout

\begin_layout Standard
Get controller info for specified controller.
 If controller does not exist, returns nil.
 Otherwise returns a table with following fields:
\end_layout

\begin_layout Itemize
type (string): Type of the controller.
\end_layout

\begin_layout Itemize
class (string): Class of the controller.
\end_layout

\begin_layout Itemize
classnum (number): Number of the controller within its class (1-based)
\end_layout

\begin_layout Itemize
lcid (number): Logical controller number of the controller.
\end_layout

\begin_layout Itemize
button_count (number): Number of buttons on controller
\end_layout

\begin_layout Itemize
buttons (array): Array of following info about each button:
\end_layout

\begin_deeper
\begin_layout Itemize
type (string): Type of button.
 Currently one of 
\begin_inset Quotes eld
\end_inset

null
\begin_inset Quotes erd
\end_inset

, 
\begin_inset Quotes eld
\end_inset

button
\begin_inset Quotes erd
\end_inset

, 
\begin_inset Quotes eld
\end_inset

axis
\begin_inset Quotes erd
\end_inset

, 
\begin_inset Quotes eld
\end_inset

raxis
\begin_inset Quotes erd
\end_inset

.
\end_layout

\begin_layout Itemize
name (string): Name of button.
\end_layout

\begin_layout Itemize
symbol (string): Symbol of button.
 Only present for type 
\begin_inset Quotes eld
\end_inset

button
\begin_inset Quotes erd
\end_inset

.
\end_layout

\begin_layout Itemize
hidden (boolean): True if hidden button.
 
\end_layout

\end_deeper
\begin_layout Subsection
input.veto_button: Veto a button press
\end_layout

\begin_layout Itemize
Syntax: none input.veto_button()
\end_layout

\begin_layout Standard
Signals that the button event should be vetoed.
 Only valid in on_button callback.
\end_layout

\begin_layout Subsection
input.geta: Get all buttons for controller (deprecated)
\end_layout

\begin_layout Itemize
Syntax: (number, number...) input.geta(number controller)
\end_layout

\begin_layout Standard
Get input state for entiere controller.
 Returns n return values.
\end_layout

\begin_layout Itemize
1st return value: Bitmask: bit i is set if i:th index is nonzero
\end_layout

\begin_layout Itemize
2nd- return value: value of i:th index.
\end_layout

\begin_layout Subsection
input.seta: Set all buttons for controller (deprecated)
\end_layout

\begin_layout Itemize
Syntax: none input.seta(number controller, number bitmask, number args...)
\end_layout

\begin_layout Standard
Set state for entiere controller.
 args is up to N values for indices (overriding values in bitmask if specified).
\end_layout

\begin_layout Subsection
input.controllertype: Get controller type (deprecated)
\end_layout

\begin_layout Itemize
syntax: string input.controllertype(number controller)
\end_layout

\begin_layout Standard
Get the type of controller as string.
\end_layout

\begin_layout Subsection
input.reset: Execute (delayed) reset
\end_layout

\begin_layout Itemize
Syntax: none input.reset([number cycles])
\end_layout

\begin_layout Standard
Execute reset.
 If <cycles> is greater than zero, do delayed reset.
 0 (or no value) causes immediate reset.
\end_layout

\begin_layout Itemize
Note: Only available with subframe flag false.
\end_layout

\begin_layout Subsection
input.raw: Return raw input data
\end_layout

\begin_layout Itemize
Syntax: table input.raw()
\end_layout

\begin_layout Standard
Returns table of tables of all available keys and axes.
 The first table is indexed by key name (platform-dependent!), and the inner
 table has the following fields:
\end_layout

\begin_layout Itemize
value: Last reported value for control
\end_layout

\begin_deeper
\begin_layout Itemize
For keys: 1 for pressed, 0 for released.
\end_layout

\begin_layout Itemize
For axes: -32767...32767.
\end_layout

\begin_layout Itemize
For presure-sensitive buttons: 0...32767.
\end_layout

\begin_layout Itemize
For hats: Bitmask: 1=>Up, 2=>Right, 4=>Down, 8=>Left.
\end_layout

\begin_layout Itemize
For mouse: Coordinates relative to game area.
\end_layout

\end_deeper
\begin_layout Itemize
ktype: Type of key (disabled, key, mouse, axis, hat, pressure).
\end_layout

\begin_layout Subsection
input.keyhook: Hook a key
\end_layout

\begin_layout Itemize
Syntax: none input.keyhook(string key, boolean state)
\end_layout

\begin_layout Standard
Requests that keyhook events to be sent for key <key> (<state>=true) or
 not sent (<state>=false).
\end_layout

\begin_layout Subsection
input.joyget: Get controls for controller
\end_layout

\begin_layout Itemize
Syntax: table input.joyget(number logical)
\end_layout

\begin_layout Standard
Returns table for current controls for specified logical controller <logical>.
 The names of fields vary by controller type.
\end_layout

\begin_layout Itemize
The buttons have the same name as those are referred to in other contexts
 in the emulator
\end_layout

\begin_layout Itemize
The analog axes are usually 
\begin_inset Quotes eld
\end_inset

xaxis
\begin_inset Quotes erd
\end_inset

 and 
\begin_inset Quotes eld
\end_inset

yaxis
\begin_inset Quotes erd
\end_inset

.
\end_layout

\begin_layout Itemize
Each field is numeric or boolean depending on axis/button.
\end_layout

\begin_layout Subsection
input.joyset: Set controls for controller
\end_layout

\begin_layout Itemize
Syntax: none input.joyset(number controller, table controls)
\end_layout

\begin_layout Standard
Set the the state of specified controller to values specified in specified
 table.
\end_layout

\begin_layout Itemize
Each field can be boolean or number.
\end_layout

\begin_layout Itemize
Also, buttons allow strings, which cause value to be inverted.
\end_layout

\begin_layout Subsection
input.lcid_to_pcid: Look up logical controller (deprecated)
\end_layout

\begin_layout Itemize
Syntax: (number, number, number) input.lcid_to_pcid(number lcid)
\end_layout

\begin_layout Standard
Returns the legacy pcid for controller (or false if there isn't one), followed
 by pcid pair.
 Returns nothing if controller does not exist.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table keyboard
\end_layout

\begin_layout Standard
Various keybinding-related functions
\end_layout

\begin_layout Subsection
keyboard.bind: Bind a key
\end_layout

\begin_layout Itemize
Syntax: none keyboard.bind(string mod, string mask, string key, string cmd)
\end_layout

\begin_layout Standard
Bind specified key with specified modifers to specified command.
\end_layout

\begin_layout Subsection
keyboard.unbind: Unbind a key
\end_layout

\begin_layout Itemize
Syntax: none keyboard.unbind(string mod, string mask, string key)
\end_layout

\begin_layout Standard
Unbind specified key with specified modifers.
\end_layout

\begin_layout Subsection
keyboard.alias: Set alias expansion
\end_layout

\begin_layout Itemize
Syntax: none keyboard.alias(string alias, string expansion)
\end_layout

\begin_layout Standard
Set expansion of given command.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table subtitle
\end_layout

\begin_layout Standard
Subtitle handling
\end_layout

\begin_layout Subsection
subtitle.byindex: Look up start and length of subtitle by index
\end_layout

\begin_layout Itemize
Syntax: (number, number) subtitle.byindex(number i)
\end_layout

\begin_layout Standard
Read the frame and length of ith subtitle.
 Returns nothing if not present.
\end_layout

\begin_layout Subsection
subtitle.set: Write a subtitle
\end_layout

\begin_layout Itemize
Syntax: none subtitle.set(number f, number l, string txt)
\end_layout

\begin_layout Standard
Set the text of subtitle.
\end_layout

\begin_layout Subsection
subtitle.get: Read a subtitle
\end_layout

\begin_layout Itemize
Syntax: string subtitle.get(number f, number l)
\end_layout

\begin_layout Standard
Get the text of subtitle.
\end_layout

\begin_layout Subsection
subtitle.delete: Delete a subtitle
\end_layout

\begin_layout Itemize
Syntax: nonesubtitle.delete(number f, number l)
\end_layout

\begin_layout Standard
Delete specified subtitle.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table hostmemory
\end_layout

\begin_layout Standard
Host memory handling (extra memory saved to savestates).
 Host memory starts empty.
\end_layout

\begin_layout Itemize
Reads out of range return false.
\end_layout

\begin_layout Itemize
Writes out of range extend the memory.
\end_layout

\begin_layout Subsection
hostmemory.read: Read byte from host memory
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.read(number address)
\end_layout

\begin_layout Standard
Reads byte from hostmemory slot address <address>.
\end_layout

\begin_layout Subsection
hostmemory.write: Write byte to host memory
\end_layout

\begin_layout Itemize
Syntax: none hostmemory.write(number address, number value)
\end_layout

\begin_layout Standard
Writes hostmemory slot with value <value> 0-255.
\end_layout

\begin_layout Subsection
hostmemory.read{,s}{byte,{,d,q}word}: Read from host memory
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.readbyte(number address)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.readsbyte(number address)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.readword(number address)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.readsword(number address)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.readdword(number address)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.readsdword(number address)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.readqword(number address)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.readsqword(number address)
\end_layout

\begin_layout Standard
Read elements (little-endian) from given address <address>.
\end_layout

\begin_layout Itemize
byte is 1 element
\end_layout

\begin_layout Itemize
word is 2 elements
\end_layout

\begin_layout Itemize
dword is 4 elements
\end_layout

\begin_layout Itemize
qword is 8 elements.
\end_layout

\begin_layout Itemize
The 's' variants do signed read.
\end_layout

\begin_layout Subsection
hostmemory.write{,s}{byte,{,d,q}word}: Write to host memory
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.writebyte(number address, number value)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.writesbyte(number address, number value)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.writeword(number address, number value)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.writesword(number address, number value)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.writedword(number address, number value)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.writesdword(number address, number value)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.writeqword(number address, number value)
\end_layout

\begin_layout Itemize
Syntax: number hostmemory.writesqword(number address, number value)
\end_layout

\begin_layout Standard
Write value <value> to elements (little-endian) starting from given address
 <address>.
\end_layout

\begin_layout Itemize
byte is 1 element
\end_layout

\begin_layout Itemize
word is 2 elements
\end_layout

\begin_layout Itemize
dword is 4 elements
\end_layout

\begin_layout Itemize
qword is 8 elements.
\end_layout

\begin_layout Itemize
The 's' variants do signed write.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table movie
\end_layout

\begin_layout Standard
Movie handling
\end_layout

\begin_layout Subsection
movie.currentframe: Get current frame number
\end_layout

\begin_layout Itemize
Syntax: number movie.currentframe()
\end_layout

\begin_layout Standard
Return number of current frame.
\end_layout

\begin_layout Subsection
movie.framecount: Get move frame count
\end_layout

\begin_layout Itemize
Syntax: number movie.framecount()
\end_layout

\begin_layout Standard
Return number of frames in movie.
\end_layout

\begin_layout Subsection
movie.readonly: Is in readonly mode?
\end_layout

\begin_layout Itemize
Syntax: boolean movie.readonly()
\end_layout

\begin_layout Standard
Return true if in readonly mode, false if in readwrite.
\end_layout

\begin_layout Subsection
movie.rerecords: Movie rerecord count
\end_layout

\begin_layout Itemize
Syntax: number movie.rerecords()
\end_layout

\begin_layout Standard
Returns the current value of rerecord count.
\end_layout

\begin_layout Subsection
movie.set_readwrite: Set read-write mode.
\end_layout

\begin_layout Itemize
Syntax: none movie.set_readwrite()
\end_layout

\begin_layout Standard
Set readwrite mode (does not cause on_readwrite callback).
\end_layout

\begin_layout Subsection
movie.frame_subframes: Count subframes in frame
\end_layout

\begin_layout Itemize
Syntax: number movie.frame_subframes(number frame)
\end_layout

\begin_layout Standard
Count number of subframes in specified frame <frame> (frame numbers are
 1-based) and return that.
\end_layout

\begin_layout Subsection
movie.read_subframes: Read subframe data (deprecated)
\end_layout

\begin_layout Itemize
Syntax: table movie.read_subframes(number frame, number subframe)
\end_layout

\begin_layout Standard
Read specifed subframe in specified frame and return data as array.
\end_layout

\begin_layout Subsection
movie.read_rtc: Read current RTC time
\end_layout

\begin_layout Itemize
Syntax: (number, number) movie.read_rtc()
\end_layout

\begin_layout Standard
Returns the current value of the RTC as a pair (second, subsecond).
\end_layout

\begin_layout Subsection
movie.unsafe_rewind: Fast movie rewind to saved state
\end_layout

\begin_layout Itemize
Syntax: none movie.unsafe_rewind([UNSAFEREWIND state])
\end_layout

\begin_layout Standard
Start setting point for unsafe rewind or jump to point of unsafe rewind.
\end_layout

\begin_layout Itemize
If called without argument, causes emulator to start process of setting
 unsafe rewind point.
 When this has finished, callback on_set_rewind occurs, passing the rewind
 state to lua script.
\end_layout

\begin_layout Itemize
If called with argument, causes emulator rewind to passed rewind point as
 soon as possible.
 Readwrite mode is implicitly activated.
\end_layout

\begin_layout Standard
The following warnings apply to unsafe rewinding:
\end_layout

\begin_layout Itemize
There are no safety checks against misuse (that's what 
\begin_inset Quotes eld
\end_inset

unsafe
\begin_inset Quotes erd
\end_inset

 comes from)!
\end_layout

\begin_layout Itemize
Only call rewind from timeline rewind point was set from.
\end_layout

\begin_layout Itemize
Only call rewind from after the rewind point was set.
\end_layout

\begin_layout Subsection
movie.to_rewind: Load savestate as rewind point
\end_layout

\begin_layout Itemize
Syntax: UNSAFEREWIND movie.to_rewind(string filename)
\end_layout

\begin_layout Standard
Load specified savestate file <filename> as rewind point and return UNSAFEREWIND
 corresponding to it.
\end_layout

\begin_layout Itemize
Note: This operation does not take emulated time.
\end_layout

\begin_layout Subsection
movie.copy_movie/INPUTMOVIE::copy_movie: Copy movie to movie object
\end_layout

\begin_layout Itemize
Syntax: INPUTMOVIE movie.copy_movie([INPUTMOVIE movie])
\end_layout

\begin_layout Itemize
Syntax: INPUTMOVIE INPUTMOVIE::copy_movie()
\end_layout

\begin_layout Standard
Copies specified movie <movie>/current object (if none or nil, the active
 movie) as new movie object.
\end_layout

\begin_layout Subsection
movie.get_frame/INPUTMOVIE::get_frame: Read specified frame in movie.
\end_layout

\begin_layout Itemize
Syntax: INPUTFRAME movie.get_frame([INPUTMOVIE movie,] number frame)
\end_layout

\begin_layout Itemize
Syntax: INPUTFRAME INPUTMOVIE::get_frame(number frame);
\end_layout

\begin_layout Standard
Get INPUTFRAME object corresponding to specified frame in specified movie.
\end_layout

\begin_layout Subsection
movie.set_frame/INPUTMOVIE::set_frame: Write speicifed frame in movie.
\end_layout

\begin_layout Itemize
Syntax: none movie.set_frame([INPUTMOVIE movie,] number frame, INPUTFRAME
 data)
\end_layout

\begin_layout Itemize
Syntax: none INPUTMOVIE::set_frame(number frame, INPUTFRAME data)
\end_layout

\begin_layout Standard
Set data in specified frame.
\end_layout

\begin_layout Itemize
Note: Past can't be edited in active movie.
\end_layout

\begin_layout Subsection
movie.get_size/INPUTMOVIE::get_size: Get size of movie
\end_layout

\begin_layout Itemize
Syntax: integer movie.get_size([INPUTMOVIE movie])
\end_layout

\begin_layout Itemize
Syntax: integer INPUTMOVIE::get_size()
\end_layout

\begin_layout Standard
Return number of subframes in specified movie.
\end_layout

\begin_layout Subsection
movie.count_frames/INPUTMOVIE::count_frames: Count frames in movie
\end_layout

\begin_layout Itemize
Syntax: number movie.count_frames([INPUTMOVIE movie])
\end_layout

\begin_layout Itemize
Syntax: number INPUTMOVIE::count_frames()
\end_layout

\begin_layout Standard
Return number of frames in movie.
\end_layout

\begin_layout Subsection
movie.find_frame/INPUTMOVIE::find_frame: Find subframe corresponding to frame
\end_layout

\begin_layout Itemize
Syntax: number movie.find_frame([INPUTMOVIE movie], number frame)
\end_layout

\begin_layout Itemize
Syntax: number INPUTMOVIE::find_frame(number frame)
\end_layout

\begin_layout Standard
Returns starting subframe of given frame (frame numbers are 1-based).
 Returns -1 if frame number is bad.
\end_layout

\begin_layout Subsection
movie.blank_frame/INPUTMOVIE::blank_frame: Return a blank frame
\end_layout

\begin_layout Itemize
Syntax: INPUTFRAME movie.blank_frame([INPUTMOVIE movie])
\end_layout

\begin_layout Itemize
Syntax: INPUTFRAME INPUTMOVIE::blank_frame()
\end_layout

\begin_layout Standard
Return blank INPUTFRAME with frame type from specified movie.
\end_layout

\begin_layout Subsection
movie.append_frames/INPUTMOVIE::append_frames: Append blank frames
\end_layout

\begin_layout Itemize
Syntax: none movie.append_frames([INPUTMOVIE movie,] number frames)
\end_layout

\begin_layout Itemize
Syntax: none INPUTMOVIE::append_frames(number frames)
\end_layout

\begin_layout Standard
Append specified number <frames> of frames.
\end_layout

\begin_layout Subsection
movie.append_frame/INPUTMOVIE::append_frame: Append a frame
\end_layout

\begin_layout Itemize
Syntax: none movie.append_frame([INPUTMOVIE movie,] INPUTFRAME frame)
\end_layout

\begin_layout Itemize
Syntax: none INPUTMOVIE::append_frame(INPUTFRAME frame)
\end_layout

\begin_layout Standard
Append specified frame <frame>.
 Past of current movie can't be edited.
\end_layout

\begin_layout Subsection
movie.truncate/INPUTMOVIE::truncate: Truncate a movie.
\end_layout

\begin_layout Itemize
Syntax: none movie.truncate([INPUTMOVIE movie,] number frames)
\end_layout

\begin_layout Itemize
Syntax: none INPUTMOVIE::truncate(number frames)
\end_layout

\begin_layout Standard
Truncate the specified movie to specified number of frames.
\end_layout

\begin_layout Subsection
movie.edit/INPUTMOVIE::edit: Edit a movie
\end_layout

\begin_layout Itemize
Syntax: none movie.edit([INPUTMOVIE movie,] number frame, number port, number
 controller, number control, number/bool value)
\end_layout

\begin_layout Itemize
Syntax: none INPUTMOVIE::edit(number frame, number port, number controller,
 number control, number/bool value)
\end_layout

\begin_layout Standard
Change specified control in specified frame in specified movie.
 Past can't be edited in active movie.
\end_layout

\begin_layout Subsection
movie.copy_frames2: Copy frames between movies
\end_layout

\begin_layout Itemize
Syntax: none movie.copy_frames2([INPUTMOVIE dstmov,] number dst, [INPUTMOVIE
 srcmov,] number src, number count)
\end_layout

\begin_layout Standard
Copy specified number of frames between two movies.
 The copy proceeeds in forward direction.
\end_layout

\begin_layout Subsection
movie.copy_frames/INPUTMOVIE::copy_frames: Copy frames in movie
\end_layout

\begin_layout Itemize
Syntax: none movie.copy_frames([INPUTMOVIE mov,] number dst, number src,
 number count, bool backwards)
\end_layout

\begin_layout Itemize
Syntax: none INPUTMOVIE::copy_frames(number dst, number src, number count,
 bool backwards)
\end_layout

\begin_layout Standard
Copy specified number of frames from one point in movie to another.
 If backwards is true, the copy will be done backwards.
\end_layout

\begin_layout Subsection
movie.serialize/INPUTMOVIE::serialize: Serialize movie
\end_layout

\begin_layout Itemize
Syntax: none movie.serialize([INPUTMOVIE movie,] string filename, bool binary)
\end_layout

\begin_layout Itemize
Syntax: none INPUTMOIVE::serialize(string filename, bool binary)
\end_layout

\begin_layout Standard
Serialize given movie into file.
 If binary is true, binary format (more compact and much faster) is used.
\end_layout

\begin_layout Subsection
movie.unserialize: Unserialize movie
\end_layout

\begin_layout Itemize
Syntax: INPUTMOVIE movie.unserialize(INPUTFRAME template, string filename,
 bool binary)
\end_layout

\begin_layout Standard
Unserialize movie from file.
 The given frame is used as template to decide the frame type.
 If binary is true, binary format is decoded (much faster).
\end_layout

\begin_layout Subsection
movie.current_first_subframe: Return first subframe in current frame
\end_layout

\begin_layout Itemize
Syntax: number movie.current_first_subframe()
\end_layout

\begin_layout Standard
Returns first subframe in current frame.
\end_layout

\begin_layout Subsection
movie.pollcounter: Return poll counter for speified control
\end_layout

\begin_layout Itemize
Syntax: number movie.pollcounter(number port, number controller, number control)
\end_layout

\begin_layout Standard
Returns number of times the specified control has been polled this frame.
\end_layout

\begin_layout Subsection
INPUTFRAME::get_button: Get button
\end_layout

\begin_layout Itemize
Syntax: boolean INPUTFRAME::get_button(number port, number controller, number
 control)
\end_layout

\begin_layout Standard
Returns state of given button as boolean.
\end_layout

\begin_layout Subsection
INPUTFRAME::get_axis: Get axis
\end_layout

\begin_layout Itemize
Syntax: number INPUTFRAME::get_axis(number port, number controller, number
 control)
\end_layout

\begin_layout Standard
Returns state of given axis as number.
\end_layout

\begin_layout Subsection
INPUTFRAME::set_button/INPUTFRAME::set_axis: Set button or axis
\end_layout

\begin_layout Itemize
Syntax: none INPUTFRAME::set_button(number port, number controller, number
 control, number/bool value)
\end_layout

\begin_layout Itemize
Syntax: none INPUTFRAME::set_axis(number port, number controller, number
 control)
\end_layout

\begin_layout Standard
Set the given button/axis to given value.
\end_layout

\begin_layout Subsection
INPUTFRAME::serialize: Serialize a frame
\end_layout

\begin_layout Itemize
Syntax: string INPUTFRAME::serialize()
\end_layout

\begin_layout Standard
Return string representation of frame.
\end_layout

\begin_layout Subsection
INPUTFRAME::unserialize: Unserialize a frame
\end_layout

\begin_layout Itemize
Syntax: none INPUTFRAME::unserialize(string data)
\end_layout

\begin_layout Standard
Set current frame from given data.
\end_layout

\begin_layout Subsection
INPUTFRAME::get_stride: Get movie stride
\end_layout

\begin_layout Itemize
Syntax: number INPUTFRAME::get_stride()
\end_layout

\begin_layout Standard
Return number of bytes needed to store the input frame.
 Mainly useful for some debugging.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table settings
\end_layout

\begin_layout Standard
Routines for settings manipulation
\end_layout

\begin_layout Subsection
settings.get: Get value of setting
\end_layout

\begin_layout Itemize
Syntax: string settings.get(string name)
\end_layout

\begin_layout Standard
Get value of setting <name>.
 If setting value can't be obtained, returns (nil, error message).
\end_layout

\begin_layout Subsection
settings.set: Set value of setting
\end_layout

\begin_layout Itemize
Syntax: none settings.set(string name, string value)
\end_layout

\begin_layout Standard
Set value <value> of setting <name>.
 If setting can't be set, returns (nil, error message).
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table memory
\end_layout

\begin_layout Standard
Contains various functions for managing memory
\end_layout

\begin_layout Subsection
memory.vma_count: Count number of VMAs.
\end_layout

\begin_layout Itemize
Syntax: number memory.vma_count()
\end_layout

\begin_layout Standard
Returns the number of VMAs
\end_layout

\begin_layout Subsection
memory.read_vma: Lookup VMA info by index
\end_layout

\begin_layout Itemize
Syntax: string memory.read_vma(number index)
\end_layout

\begin_layout Standard
Reads the specified VMA (indices start from zero).
 Trying to read invalid VMA gives nil.
 The read VMA is table with the following fields:
\end_layout

\begin_layout Itemize
region_name (string): The readable name of the VMA
\end_layout

\begin_layout Itemize
baseaddr (number): Base address of the VMA
\end_layout

\begin_layout Itemize
lastaddr (number): Last address in the VMA.
\end_layout

\begin_layout Itemize
size (number): The size of VMA in bytes.
\end_layout

\begin_layout Itemize
readonly (boolean): True of the VMA corresponds to ROM.
\end_layout

\begin_layout Itemize
iospace (boolean): True if the VMA is I/O space.
\end_layout

\begin_layout Itemize
native_endian (boolean): True if the VMA has native endian as opposed to
 little endian.
\end_layout

\begin_layout Subsection
memory.find_vma: Find VMA info by address
\end_layout

\begin_layout Itemize
Syntax: table memory.find_vma(number address)
\end_layout

\begin_layout Standard
Finds the VMA containing specified address.
 Returns table in the same format as read_vma or nil if not found.
\end_layout

\begin_layout Subsection
memory.read{,s}{byte,{,d,q}word}: Write memory
\end_layout

\begin_layout Itemize
Syntax: none memory.readbyte([string vma, ]number address)
\end_layout

\begin_layout Itemize
Syntax: none memory.readword([string vma, ]number address)
\end_layout

\begin_layout Itemize
Syntax: none memory.readdword([string vma, ]number address)
\end_layout

\begin_layout Itemize
Syntax: none memory.readqword([string vma, ]number address)
\end_layout

\begin_layout Itemize
Syntax: none memory.readsbyte([string vma, ]number address)
\end_layout

\begin_layout Itemize
Syntax: none memory.readsword([string vma, ]number address)
\end_layout

\begin_layout Itemize
Syntax: none memory.readsdword([string vma, ]number address)
\end_layout

\begin_layout Itemize
Syntax: none memory.readsqword([string vma, ]number address)
\end_layout

\begin_layout Standard
Reads the specified address <ddress> (if 's' variant is used, do undergo
 2's complement).
\end_layout

\begin_layout Subsection
memory.write{byte,{,d,q}word}: Write memory
\end_layout

\begin_layout Itemize
Syntax: none memory.writebyte([string vma, ]number address, number value)
\end_layout

\begin_layout Itemize
Syntax: none memory.writeword([string vma, ]number address, number value)
\end_layout

\begin_layout Itemize
Syntax: none memory.writedword([string vma, ]number address, number value)
\end_layout

\begin_layout Itemize
Syntax: none memory.writeqword([string vma, ]number address, number value)
\end_layout

\begin_layout Standard
Writes the specified value <value> (negative values undergo 2's complement)
 to specified address <address>.
\end_layout

\begin_layout Subsection
memory.map{,s}{byte,{,d,q}word}: Map an array
\end_layout

\begin_layout Itemize
Syntax: userdata memory.map<type>([[string vma, ]number base, number size])
\end_layout

\begin_layout Standard
Returns a table mapping specified memory aperture for read/write.
 If parameters are omitted, entiere map space is the aperture.
\end_layout

\begin_layout Itemize
Type may be one of: byte, sbyte, word, sword, dword, sdword, qword or sqword.
\end_layout

\begin_layout Subsection
memory.hash_region: Hash region of memory
\end_layout

\begin_layout Itemize
Syntax: string memory.hash_region([string vma, ]number base, number size)
\end_layout

\begin_layout Standard
Hash specified number of bytes starting from specified address and return
 the SHA-256.
\end_layout

\begin_layout Subsection
memory.hash_state: Hash system state
\end_layout

\begin_layout Itemize
Syntax: string memory.hash_state()
\end_layout

\begin_layout Standard
Hash the current system state.
 Mainly useful for debugging savestates.
\end_layout

\begin_layout Subsection
memory.readregion: Read region of memory
\end_layout

\begin_layout Itemize
Syntax: table memory.readregion([string vma, ]number base, number size)
\end_layout

\begin_layout Standard
Read a region of memory.
\end_layout

\begin_layout Itemize
Warning: If the region crosses VMA boundary, the results are undefined.
\end_layout

\begin_layout Subsection
memory.writeregion: Write region of memory
\end_layout

\begin_layout Itemize
Syntax: none memory.writeregion([string vma, ]number base, number size, table
 data)
\end_layout

\begin_layout Standard
Write a region of memory.
\end_layout

\begin_layout Itemize
Warning: If the region crosses VMA boundary, the results are undefined.
\end_layout

\begin_layout Subsection
memory.map_structure: Create mmap structure
\end_layout

\begin_layout Itemize
syntax: MMAP_STRUCT memory.map_structure()
\end_layout

\begin_layout Standard
Returns a new mapping structure (MMAP_STRUCT)
\end_layout

\begin_layout Subsection
MMAP_STRUCT(): Bind key in mmap structure
\end_layout

\begin_layout Itemize
Syntax: none MMAP_STRUCT(string key, [string vma, ]number address, string
 type)
\end_layout

\begin_layout Standard
Bind key <key> in mmap structure to specified address <address> with specified
 type <type>.
\end_layout

\begin_layout Itemize
Type may be one of: byte, sbyte, word, sword, dword, sdword, qword or sqword.
\end_layout

\begin_layout Subsection
memory.read_expr: Evaluate memory watch expression
\end_layout

\begin_layout Itemize
Syntax: string memory.read_expr(string expr)
\end_layout

\begin_layout Standard
Evaluate specified watch expression and return result
\end_layout

\begin_layout Subsection
memory.action: Run core action
\end_layout

\begin_layout Itemize
memory.action(string action, [<params>])
\end_layout

\begin_layout Standard
Run core action.
 The different models expect parameters as:
\end_layout

\begin_layout Itemize
string: String
\end_layout

\begin_layout Itemize
numeric: numeric
\end_layout

\begin_layout Itemize
enumeration: String
\end_layout

\begin_layout Itemize
boolean: String
\end_layout

\begin_layout Itemize
toggle: None.
\end_layout

\begin_layout Subsection
memory.get_lag_flag: Get lag flag
\end_layout

\begin_layout Itemize
Syntax: boolean memory.get_lag_flag()
\end_layout

\begin_layout Standard
Get the value of core lag flag.
 True if this frame has been lag so far, false if poll has been detected.
\end_layout

\begin_layout Subsection
memory.set_lag_flag: Set lag flag
\end_layout

\begin_layout Itemize
Syntax: none memory.set_lag_flag(boolean flag)
\end_layout

\begin_layout Standard
Set the value of core lag flag.
 This flag automatically gets cleared if poll is detected, but can be forcibly
 set or cleared if game so requires.
\end_layout

\begin_layout Itemize
Should only be used in on_frame_emulated callback.
\end_layout

\begin_layout Itemize
Setting or clearing this affects the emulator lag counter.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table memory2
\end_layout

\begin_layout Standard
Contains newer memory functions.
\end_layout

\begin_layout Subsection
memory2(): Get all VMA names.
\end_layout

\begin_layout Itemize
Syntax: table memory2()
\end_layout

\begin_layout Standard
Returns array of all valid VMA names.
\end_layout

\begin_layout Subsection
memory2.<vma>:info: Get VMA info
\end_layout

\begin_layout Itemize
Syntax: table memory2.<vma>:info()
\end_layout

\begin_layout Standard
Return table describing given VMA.
 Includes fields address, size, last, readonly, special and endian.
\end_layout

\begin_layout Subsection
memory2.<vma>:<op>: Read/Write memory
\end_layout

\begin_layout Itemize
Syntax: none memory2.<vma>:<op>(number offset, number value)
\end_layout

\begin_layout Itemize
Syntax: number memory2.<vma>:<op>(number offset)
\end_layout

\begin_layout Standard
Read/Write value from/to given VMA <vma> at given offset <offset> (must
 be in-range).
 The value written is <value>.
 <Op> is of form: [i][s]<type>, where:
\end_layout

\begin_layout Itemize
<type> is one of 'byte', 'word', 'dword', 'qword'.
\end_layout

\begin_layout Itemize
'i' signifies that the value is treated as opposite-to-normal endianess,
\end_layout

\begin_layout Itemize
's' signifies that value is treated as signed.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
Table callback
\end_layout

\begin_layout Standard
Various callback-related functions.
\end_layout

\begin_layout Subsection
\begin_inset CommandInset label
LatexCommand label
name "sub:callback.register:-Register-a"

\end_inset

callback.register: Register a callback
\end_layout

\begin_layout Itemize
Syntax: function callback.register(string cbname, function cbfun);
\end_layout

\begin_layout Standard
Instruct function <cbfun> to be added to list of callbacks to call on event
 <cbname> (See section 
\begin_inset CommandInset ref
LatexCommand ref
reference "sec:Callbacks"

\end_inset

).
 The callback name does not have the 'on_' prefix (e.g.
 
\begin_inset Quotes eld
\end_inset

paint
\begin_inset Quotes erd
\end_inset

).
 Returns <cbfun>.
\end_layout

\begin_layout Subsection
\begin_inset CommandInset label
LatexCommand label
name "sub:callback.unregister:-Unregister-"

\end_inset

callback.unregister: Unregister a callback
\end_layout

\begin_layout Itemize
Syntax: function callback.unregister(string cbname, function cbfun);
\end_layout

\begin_layout Standard
Instruct function <cbfun> to be removed from list of callbacks to call on
 event <cbname>.
\end_layout

\begin_layout Subsection
callback.<cbname>:register: Register callback
\end_layout

\begin_layout Itemize
Syntax: function callback.<cbname>:register(function cbfun)
\end_layout

\begin_layout Standard
Synonym for callback.register (section 
\begin_inset CommandInset ref
LatexCommand ref
reference "sub:callback.register:-Register-a"

\end_inset

), albeit with callback name specified differently.
\end_layout

\begin_layout Subsection
callback.<cbname>:unregister: Register callback
\end_layout

\begin_layout Itemize
Syntax: function callback.<cbname>:unregister(function cbfun)
\end_layout

\begin_layout Standard
Synonym for callback.unregister (section 
\begin_inset CommandInset ref
LatexCommand ref
reference "sub:callback.unregister:-Unregister-"

\end_inset

), albeit with callback name specified differently.
\end_layout

\begin_layout Section
Table _SYSTEM
\end_layout

\begin_layout Standard
Contains copy of global variables from time of Lua initialization.
 Non-writeable.
\end_layout

\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset


\end_layout

\begin_layout Section
\begin_inset CommandInset label
LatexCommand label
name "sec:Callbacks"

\end_inset

Callbacks
\end_layout

\begin_layout Standard
Various callbacks to Lua that can occur.
\end_layout

\begin_layout Subsection
on_paint: Screen is being painted
\end_layout

\begin_layout Itemize
Callback: on_paint(bool not_synth)
\end_layout

\begin_layout Standard
Called when screen is being painted.
 Any gui.* calls requiring graphic context draw on the screen.
\end_layout

\begin_layout Itemize
not_synth is true if this hook is being called in response to received frame,
 false otherwise.
\end_layout

\begin_layout Subsection
on_video: Dumped video frame is being painted
\end_layout

\begin_layout Itemize
Callback: on_video()
\end_layout

\begin_layout Standard
Called when video dump frame is being painted.
 Any gui.* calls requiring graphic context draw on the video.
\end_layout

\begin_layout Subsection
on_frame_emulated: Frame emulation complete
\end_layout

\begin_layout Itemize
Callback: on_frame_emulated()
\end_layout

\begin_layout Standard
Called when emulating frame has completed and on_paint()/on_video() calls
 are about to be issued.
\end_layout

\begin_layout Subsection
on_frame: Frame emulation starting.
\end_layout

\begin_layout Itemize
Callback: on_frame()
\end_layout

\begin_layout Standard
Called on each starting whole frame.
\end_layout

\begin_layout Subsection
on_startup: Emulator startup complete
\end_layout

\begin_layout Itemize
Callback: on_startup()
\end_layout

\begin_layout Standard
Called when the emulator is starting (lsnes.rc and --run files has been run).
\end_layout

\begin_layout Subsection
on_rewind: Movie rewound to beginning
\end_layout

\begin_layout Itemize
Callback: on_rewind()
\end_layout

\begin_layout Standard
Called when rewind movie to beginning has completed.
\end_layout

\begin_layout Subsection
on_pre_load: Load operation is about to start
\end_layout

\begin_layout Itemize
Callback: on_pre_load(string name)
\end_layout

\begin_layout Standard
Called just before savestate/movie load occurs (note: loads are always delayed,
 so this occurs even when load was initiated by lua).
\end_layout

\begin_layout Subsection
on_err_Load: Load failed
\end_layout

\begin_layout Itemize
Callback: on_err_load(string name)
\end_layout

\begin_layout Standard
Called if loadstate goes wrong.
\end_layout

\begin_layout Subsection
on_post_load: Load completed
\end_layout

\begin_layout Itemize
Callback: on_post_load(string name, boolean was_savestate)
\end_layout

\begin_layout Standard
Called on successful loadstate.
 was_savestate gives if this was a savestate or a movie.
\end_layout

\begin_layout Subsection
on_pre_save: Save operation is about to start
\end_layout

\begin_layout Itemize
Callback: on_pre_save(string name, boolean is_savestate)
\end_layout

\begin_layout Standard
Called just before savestate save occurs (note: movie saves are synchronous
 and won't trigger these callbacks if called from Lua).
\end_layout

\begin_layout Subsection
on_err_save: Save failed
\end_layout

\begin_layout Itemize
Callback: on_err_save(string name)
\end_layout

\begin_layout Standard
Called if savestate goes wrong.
\end_layout

\begin_layout Subsection
on_post_save: Save completed
\end_layout

\begin_layout Itemize
Callback: on_post_save(string name, boolean is_savestate)
\end_layout

\begin_layout Standard
Called on successful savaestate.
 is_savestate gives if this was a savestate or a movie.
\end_layout

\begin_layout Subsection
on_quit: Emulator is shutting down
\end_layout

\begin_layout Itemize
Callback: on_quit()
\end_layout

\begin_layout Standard
Called when emulator is shutting down.
\end_layout

\begin_layout Subsection
on_input: Polling for input
\end_layout

\begin_layout Standard
Called when emulator is just sending input to bsnes core.
 Warning: This is called even in readonly mode, but the results are ignored.
\end_layout

\begin_layout Subsection
on_reset: System has been reset
\end_layout

\begin_layout Itemize
Callback: on_reset()
\end_layout

\begin_layout Standard
Called when system is reset.
\end_layout

\begin_layout Subsection
on_readwrite: Entered readwrite mode
\end_layout

\begin_layout Itemize
Callback: on_readwrite()
\end_layout

\begin_layout Standard
Called when moving into readwrite mode as result of 
\begin_inset Quotes eld
\end_inset

set-rwmode
\begin_inset Quotes erd
\end_inset

 command (note: moving to rwmode by Lua won't trigger this, as per recursive
 entry protection).
\end_layout

\begin_layout Subsection
on_snoop/on_snoop2: Snoop core controller reads
\end_layout

\begin_layout Itemize
Callback: on_snoop(number port, number controller, number index, number
 value)
\end_layout

\begin_layout Itemize
Callback: on_snoop2(number port, number controller, number index, number
 value)
\end_layout

\begin_layout Standard
Called each time bsnes asks for input.
 The value is the final value to be sent to bsnes core (readonly mode, autohold
 and autofire have been taken into account).
 Might be useful when translating movies to format suitable for console
 verification.
 Note: There is no way to modify the value to be sent.
\end_layout

\begin_layout Itemize
On_snoop2 is called instead of on_snoop if defined.
 Reserves port 0 for system, having first user port be port 1.
\end_layout

\begin_layout Subsection
on_keyhook: Hooked key/axis has been moved
\end_layout

\begin_layout Itemize
Callback: on_keyhook(string keyname, table state)
\end_layout

\begin_layout Standard
Sent when key that has keyhook events requested changes state.
 Keyname is name of the key (group) and state is the state (same kind as
 table values in input.raw).
\end_layout

\begin_layout Subsection
on_idle: Idle event
\end_layout

\begin_layout Itemize
Callback: on_idle()
\end_layout

\begin_layout Standard
Called when requested by set_idle_timeout(), the timeout has expired and
 emulator is waiting.
\end_layout

\begin_layout Subsection
on_timer: Timer event
\end_layout

\begin_layout Itemize
Callback: on_timer()
\end_layout

\begin_layout Standard
Called when requested by set_idle_timeout() and the timeout has expired
 (regardless if emulator is waiting).
\end_layout

\begin_layout Subsection
on_set_rewind: Rewind point has been set
\end_layout

\begin_layout Itemize
Callback: on_set_rewind(UNSAFEREWIND r)
\end_layout

\begin_layout Standard
Called when unsafe rewind object has been constructed.
\end_layout

\begin_layout Subsection
on_pre_rewind: Rewind is about to occur
\end_layout

\begin_layout Itemize
Callback: on_pre_rewind() 
\end_layout

\begin_layout Standard
Called just before unsafe rewind is about to occur.
\end_layout

\begin_layout Subsection
on_post_rewind: Rewind has occured
\end_layout

\begin_layout Itemize
Callback: on_post_rewind() 
\end_layout

\begin_layout Standard
Called just after unsafe rewind has occured.
\end_layout

\begin_layout Subsection
on_button: Button has been pressed
\end_layout

\begin_layout Itemize
Callback: on_button(number port, number controller, number index, string
 type)
\end_layout

\begin_layout Standard
Called on controller button press, with following parameters:
\end_layout

\begin_layout Itemize
port: Port number (0 is system)
\end_layout

\begin_layout Itemize
controller: Controller within port
\end_layout

\begin_layout Itemize
index: Index of button.
\end_layout

\begin_layout Itemize
type: Type of event, one of:
\end_layout

\begin_deeper
\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

pressed
\begin_inset Quotes erd
\end_inset

: Button was pressed.
\end_layout

\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

released
\begin_inset Quotes erd
\end_inset

: Button was released.
\end_layout

\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

hold
\begin_inset Quotes erd
\end_inset

: Held.
\end_layout

\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

unhold
\begin_inset Quotes erd
\end_inset

: Released from hold.
\end_layout

\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

type
\begin_inset Quotes erd
\end_inset

: Typing input on button.
\end_layout

\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

untype
\begin_inset Quotes erd
\end_inset

: Typing input undone.
\end_layout

\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

autofire <duty> <cycle>
\begin_inset Quotes erd
\end_inset

: Autofire with specifie duty and cycle.
\end_layout

\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

autofire
\begin_inset Quotes erd
\end_inset

: Stop autofire.
\end_layout

\begin_layout Itemize
\begin_inset Quotes eld
\end_inset

analog
\begin_inset Quotes erd
\end_inset

: Analog action on axis.
\end_layout

\end_deeper
\begin_layout Subsection
on_movie_lost: Movie data is about to be lost
\end_layout

\begin_layout Itemize
Callback: on_movie_lost(STRING kind)
\end_layout

\begin_layout Standard
Called just before something would happen that could lose movie data.
 Kind can be:
\end_layout

\begin_layout Itemize
readwrite: Switching to readwrite mode.
\end_layout

\begin_layout Itemize
reload: ROM is being reloaded in readwrite mode.
\end_layout

\begin_layout Itemize
load: New movie is being loaded.
\end_layout

\begin_layout Itemize
unsaferewind: Unsafe rewind is happening.
\end_layout

\end_body
\end_document