vacarsu / scenic_driver_local

Local rendering driver for Scenic

Scenic.Driver.Local

This is the main "local" renderer for Scenic applications.

If you are on a Mac/PC/Linux machine, or building under Nerves, then this is the driver to use to render on the screen connected to the computer Scenic is running on.

This driver replaces both :scenic_driver_glfw and :scenic_driver_nerves_rpi going forward for Scenic v0.11 and up.

Installation

If available in Hex, the package can be installed by adding scenic_driver_local to your list of dependencies in mix.exs:

def deps do
  [
    {:scenic_driver_local, "~> 0.11.0-beta.0"}
  ]
end

Configuration

The configuration options for scenic_driver_local are slightly different from scenic_driver_glfw, so you may need to do a little work to bring over your options. Namely, options that pertain to the window under scenic_driver_glfw, aren't relevant to any Nerves build. So they are now under the :window option.

Example:

[
  module: Scenic.Driver.Local,
  window: [title: "Local Window", resizeable: true]
]

There are quite a few new options as well. It uses NimbleOptions to confirm them, so look at the Scenic.Driver.Local module for details.

Targets

This driver does it's best to figure out what underlying graphics technology to use depending on whhat your MIX_TARGET is set to.

For example, for apps running on a Mac/PC/Linux, it is usually set to host, which causes the driver to use glfw as the underlying tech.

If you are building for Nerves, it will use bcm (Broadcom Manager) for any of rpi, rpi0, rip2, rpi3, and rpi3a.

Nerves rpi4 & bbb Need Work / Help

Scenic.Driver.Local uses drm (Direct Render Manager) for the rpi4 and bbb. It currently renders on the rpi4, but is very slow. I haven't figured out why yet and if anyone wants to dig in, that would be appreciated. It should be really fast, so is probably a hardware configuration issue.

The bbb doesn't work (is close in theory??) as the Nerves bbb system doesn't have the needed graphics support in it yet. There are others who have gotten SGX support working for the bbb and I could use some help from them.

Custom Nerves Targets

For custom systems (example - figuring out how to add SGX support to the bbb) You will need to set SCENIC_LOCAL_TARGET manually. You may also need to set the SCENIC_LOCAL_GL as well.

example in your command line

export SCENIC_LOCAL_TARGET=drm
export SCENIC_LOCAL_GL=gles3

These options may change, especially as we sort out the issues on the rpi4 and the bbb. If SCENIC_LOCAL_TARGET isn't set, then look in the build output for instructions.

Prerequisites

This driver requires Scenic v0.11 or up.

Installing on MacOS

The easiest way to install on MacOS is to use Homebrew. Just run the following in a terminal:

brew update
brew install glfw3 glew pkg-config

Once these components have been installed, you should be able to build the scenic_driver_glfw driver.

Installing on Ubuntu 18.04

The easiest way to install on Ubuntu is to use apt-get. Just run the following:

apt-get update
apt-get install pkgconf libglfw3 libglfw3-dev libglew2.0 libglew-dev

Once these components have been installed, you should be able to build the scenic_driver_glfw driver.

Installing on Ubuntu 20.04

The easiest way to install on Ubuntu is to use apt-get. Just run the following:

apt-get update
apt-get install pkgconf libglfw3 libglfw3-dev libglew2.1 libglew-dev

Once these components have been installed, you should be able to build the scenic_driver_glfw driver.

Installing on Arch Linux

The easiest way to install on Arch Linux is to use pacman. Just run the following:

pacman -Syu
sudo pacman -S glfw-x11 glew

If you're using Wayland, you'll probably need glfw-wayland instead of glfw-x11 and glew-wayland instead of glew

Installing on Windows

First, make sure to have installed Visual Studio with its "Desktop development with C++" package.

Next, you need to download the Windows binaries for GLFW and GLEW manually.

Locate your Visual Studio installation directory. Two folders will be required for the next steps:

• The Include folder: {Visual Studio Path}\VC\Tools\MSVC\{version number}\include
• The Lib folder: {Visual Studio Path}\VC\Tools\MSVC\{version number}\lib\x64

Open the GLFW package you downloaded. Extract the contents of the packaged include folder to your Visual Studio Include folder. Next to the include folder, you'll also find several lib-vc20xx folders. Select the closest match to your Visual Studio version and extract the contents to your Lib folder.

Lastly, install the GLEW package. Find the packaged include folder and extract its contents to your Include folder as well. You should now have two new folders in your Include folder: GL and GLFW. Now navigate to lib\Release\x64 in the GLEW package. Copy all *.lib files to your Lib folder. Finally, navigate to bin\Release\x64 and copy glew32.dll to your Windows\system32 folder.

Once these components have been installed, you should be able to build the scenic_driver_glfw driver.

Documentation

Documentation can be found at https://hexdocs.pm/scenic_driver_local.