libggi7ggi

Example ggi_display settings

$ GGI_DISPLAY=aa ./flying_ggis  # see ASCII art flying GGIs
$ GGI_DISPLAY=multi:(Xlib:crono:0.0):(X::0.0) ./demo  # see demo on both machine next door and local X at the same time

GGI_INPUT_target_n

GGI_INPUT_target

GGI_INPUT

GGI_INPUT_target specifies extra LibGII input sources and/or filters for visuals using target.

Multiple inputs can be specified by enclosing each input-spec in parentheses and separating them with semicolons:

(i1):...

The inputs specified by GGI_INPUT_target_n are only opened at the nth call of ggiOpen. This is used for misbehaving applications that do not allow the user to specify inputs for the different targets that it opens.

The GGI_INPUT variable specifies input settings for all other targets not specified using the other two variable forms.

Example ggi_input strings

$ export GGI_INPUT=linux-mouse:auto  # all targets
$ export GGI_INPUT_multi=linux-mouse:auto  # for multi target only

GGI_DEFMODE

Specifies the default mode, which is used for mode negotiation with LibGGI applications. Specifically, when GGI_AUTO or GT_AUTO are specified in a mode setting call they will be replaced with values from GGI_DEFMODE before calling the target's own ggiSetMode implementation.

The format is: (all on one line)

S <x> x <y> x <depth>
V <x> x <y>
D <x> x <y>
F <frames>
[ <scheme> <depth> / <size> ]

Anything and everything can be omitted, except tokens indicating what the next token is.

Any omitted values default to GGI_AUTO (or GT_AUTO for the graphtype). Whitespace and '.' symbols are ignored. Character tokens are case-insensitive. If certain values are not possible, they are overridden by the target.

S

Denotes the visible size of the visual. Totally optional, as dimensions without a specifier are considered to be the visible dimensions.

<x>

<y>

The width (x) and height (y), in pixels.

V

Denotes virtual size, the total drawing area available to the application. The virtual size must be equal or greater than the visible size.

D

Denotes the number of dots per pixel. For graphics modes, this is always 1x1, and for text modes, this is the size of the character cell.

F

Denotes number of frames available to the application. Applications can switch between different frames for double-buffering, etc.

[

]

Delimits the graphic type.

<scheme>

One of:

C

GT_TRUECOLOR

P

GT_PALETTE

K

GT_GREYSCALE

T

GT_TEXT

<depth>

Pixel depth in number of bits.

<size>

Size of pixel in number of bits, including padding.

Instead of scheme, depth, size, it is also possible to specify the graphtype by using one of the following: GT_1BIT, GT_2BIT, GT_4BIT, GT_8BIT, GT_15BIT, GT_16BIT, GT_24BIT, GT_32BIT, GT_TEXT16, GT_TEXT32

Examples of ggi_defmode strings

GGI_DEBUG

The debugging level for LibGGI:

0 or unset

debug output is off; debugging is off

255

all debug output is on

You may also bitwise-or any of the following together:

2

debug core

4

debug mode setting

8

debug color handling

16

debug drawing

32

misc debugging output

64

debug dynamic library handling

128

debug event handling

The debugging output can be quite verbose and in most cases you should redirect stderr so that it does not interfere with your program's output.

GGI_DEBUGSYNC

Turn on synchronous debugging output, flushing the output buffers before returning from GGIDPRINT calls.

FRAMEBUFFER

Specifies which framebuffer device file the fbdev target should use.

GGI_NEWVT

If set, causes a new virtual console to be allocated for some Linux-console-based targets (currently fbdev and glide).

GGI_MANSYNC_FPS

This variable specifies the framerate for targets emulating synchronous mode. The default is 20fps. If you are experiencing problems with the X target over relatively slow remote connections it might be due to connection overload. You might want to try with a lower GGI_MANSYNC_FPS setting.