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# Looking Glass Client
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This is the Looking Glass client application that is designed to work in tandem with the Looking Glass Host application
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---
## Building the Application
### Build Dependencies
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* binutils-dev
* cmake
* fonts-freefont-ttf
* libsdl2-dev
* libsdl2-ttf-dev
* libspice-protocol-dev
* libfontconfig1-dev
* libx11-dev
* nettle-dev
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#### Debian (and maybe Ubuntu)
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apt-get install binutils-dev cmake fonts-freefont-ttf libsdl2-dev libsdl2-ttf-dev libspice-protocol-dev libfontconfig1-dev libx11-dev nettle-dev
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### Building
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mkdir build
cd build
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cmake ../
make
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Should this all go well you should be left with the file `looking-glass-client`
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---
## Usage Tips
### Key Bindings
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By default Looking Glass uses the `Scroll Lock` key as the escape key for commands as well as the input capture mode toggle, this can be changed using the `-m` switch if you desire a different key.
Below are a list of current key bindings:
| Command | Description |
|-|-|
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| < kbd > ScrLk< / kbd > | Toggle cursor screen capture |
| < kbd > ScrLk< / kbd > +< kbd > F< / kbd > | Full Screen toggle |
| < kbd > ScrLk< / kbd > +< kbd > I< / kbd > | Spice keyboard & mouse enable toggle |
| < kbd > ScrLk< / kbd > +< kbd > N< / kbd > | Toggle night vision mode (EGL renderer only!) |
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| < kbd > ScrLk< / kbd > +< kbd > Insert< / kbd > | Increase mouse sensitivity (in capture mode only) |
| < kbd > ScrLk< / kbd > +< kbd > Del< / kbd > | Decrease mouse sensitivity (in capture mode only) |
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### Setting options via command line arguments
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The syntax is simple: `module:name=value` , for example:
./looking-glass-host win:fullScreen=yes egl:nvGain=1
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### Setting options via configuration files
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By default the application will look for and load the config files in the following locations
* /etc/looking-glass-client.ini
* ~/.looking-glass-client.ini
The format of this file is the commonly known INI format, for example:
[win]
fullScreen=yes
[egl]
nvGain=1
Command line arguments will override any options loaded from the config files.
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### Supported options
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```
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|-------------------------------------------------------------------------------------------------------------------------|
| Long | Short | Value | Description |
|-------------------------------------------------------------------------------------------------------------------------|
| app:configFile | -C | NULL | A file to read additional configuration from |
| app:shmFile | -f | /dev/shm/looking-glass | The path to the shared memory file |
| app:shmSize | -L | 0 | Specify the size in MB of the shared memory file (0 = detect) |
| app:renderer | -g | auto | Specify the renderer to use |
| app:license | -l | no | Show the license for this application and then terminate |
| app:cursorPollInterval | | 1000 | How often to check for a cursor update in microseconds |
| app:framePollInterval | | 1000 | How often to check for a frame update in microseconds |
|-------------------------------------------------------------------------------------------------------------------------|
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|-------------------------------------------------------------------------------------------------------|
| Long | Short | Value | Description |
|-------------------------------------------------------------------------------------------------------|
| win:title | | Looking Glass (client) | The window title |
| win:position | | center | Initial window position at startup |
| win:size | | 1024x768 | Initial window size at startup |
| win:autoResize | -a | no | Auto resize the window to the guest |
| win:allowResize | -n | yes | Aallow the window to be manually resized |
| win:keepAspect | -r | yes | Maintain the correct aspect ratio |
| win:borderless | -d | no | Borderless mode |
| win:fullScreen | -F | no | Launch in fullscreen borderless mode |
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| win:fpsLimit | -K | 200 | Frame rate limit (0 = disable - not recommended) |
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| win:showFPS | -k | no | Enable the FPS & UPS display |
| win:ignoreQuit | -Q | no | Ignore requests to quit (ie: Alt+F4) |
| win:noScreensaver | -S | no | Prevent the screensaver from starting |
| win:alerts | -q | yes | Show on screen alert messages |
|-------------------------------------------------------------------------------------------------------|
|---------------------------------------------------------------------------------------------------------------------------------------|
| Long | Short | Value | Description |
|---------------------------------------------------------------------------------------------------------------------------------------|
| input:grabKeyboard | -G | yes | Grab the keyboard in capture mode |
| input:escapeKey | -m | 71 = ScrollLock | Specify the escape key, see https://wiki.libsdl.org/SDLScancodeLookup for valid values |
| input:hideCursor | -M | yes | Hide the local mouse cursor |
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| input:mouseSens | | 0 | Initial mouse sensitivity when in capture mode (-9 to 9) |
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|---------------------------------------------------------------------------------------------------------------------------------------|
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|------------------------------------------------------------------------------------------------------------------|
| Long | Short | Value | Description |
|------------------------------------------------------------------------------------------------------------------|
| spice:enable | -s | yes | Enable the built in SPICE client for input and/or clipboard support |
| spice:host | -c | 127.0.0.1 | The SPICE server host or UNIX socket |
| spice:port | -p | 5900 | The SPICE server port (0 = unix socket) |
| spice:input | | yes | Use SPICE to send keyboard and mouse input events to the guest |
| spice:clipboard | | yes | Use SPICE to syncronize the clipboard contents with the guest |
| spice:clipboardToVM | | yes | Allow the clipboard to be syncronized TO the VM |
| spice:clipboardToLocal | | yes | Allow the clipboard to be syncronized FROM the VM |
| spice:scaleCursor | -j | yes | Scale cursor input position to screen size when up/down scaled |
|------------------------------------------------------------------------------------------------------------------|
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|--------------------------------------------------------------------------|
| Long | Short | Value | Description |
|--------------------------------------------------------------------------|
| egl:vsync | | no | Enable vsync |
| egl:nvGainMax | | 1 | The maximum night vision gain |
| egl:nvGain | | 0 | The initial night vision gain at startup |
|--------------------------------------------------------------------------|
|------------------------------------------------------------------------------------|
| Long | Short | Value | Description |
|------------------------------------------------------------------------------------|
| opengl:mipmap | | yes | Enable mipmapping |
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| opengl:vsync | | yes | Enable vsync |
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| opengl:preventBuffer | | yes | Prevent the driver from buffering frames |
| opengl:amdPinnedMem | | yes | Use GL_AMD_pinned_memory if it is available |
|------------------------------------------------------------------------------------|
```
