An OpenGL renderer for Mapbox vector tiles, implemented in C++11, currently targeting iOS, OS X, and Ubuntu Linux.

Depends

• Modern C++ compiler that supports -std=c++11 (On OS X clang++, on Linux g++-4.8 or g++-4.9)
• Boost headers
• libpng
• libuv
• glfw3
• libcurl (depends on OpenSSL; Linux only)
• libboost_regex (Linux only)
• Apple Command Line Tools (for build on OS X; available at Apple Developer)
• Homebrew (for build on OS X)
• Python 2.x (for build only)
• Node.js (for build only)

Build instructions

We use mapnik-packaging to build static libraries of dependencies.

First off: if you hit problems during development try:

make clean

This will clear cached build data and update to the latest versions of dependencies.

Mapbox API access tokens

The demo applications use Mapbox vector tiles, which require a Mapbox account and API access token. Obtain an access token on the Mapbox account page.

For iOS and OS X use of the demo apps in Xcode, setup the access token by editing the scheme for the application target, then adding an environment variable with the name MAPBOX_ACCESS_TOKEN.

OS X

Run:

make setup

This downloads all required dependencies, builds them and creates universal libraries that can be used on both OS X and iOS.

To create projects, you can run:

• make xproj: Creates an Xcode project with OS X-specific handlers for HTTP downloads and settings storage. It uses GLFW for window handling.
• make lproj: Creates an Xcode project with platform-independent handlers for downloads and settings storage. This is what is also being built on Linux.
• make linux: Builds the Linux GLFW application with make.

iOS

iOS makes use of a Cocoa-specific API called mapbox-gl-cocoa, which is included as a submodule and provides a UIView interface to the map view and some bundle resources.

First, pull down the submodule(s):

git submodule init
git submodule update

Then run:

make setup

This downloads all required dependencies, builds them and creates universal libraries that can be used on both OS X and iOS.

Lastly, make iproj to create and open an Xcode project with an iOS-specific view controller housing.

Target devices: iPhone 4 and above (4S, 5, 5c, 5s) and iPad 2 and above (3, 4, mini and/or retina).

Ubuntu

Set the environment variable MAPBOX_ACCESS_TOKEN to your token.

Ensure you have git and other build essentials:

sudo apt-get update
sudo apt-get install git build-essential zlib1g-dev automake libtool xutils-dev make cmake pkg-config nodejs-legacy curl

Install a -std=c++11 capable compiler

sudo add-apt-repository --yes ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-4.8 g++-4.8

Install glfw3 dependencies:

sudo apt-get install libxi-dev libglu1-mesa-dev x11proto-randr-dev x11proto-xext-dev libxrandr-dev x11proto-xf86vidmode-dev libxxf86vm-dev libxcursor-dev

Then run:

make setup

This downloads all required dependencies, builds them and creates universal libraries that can be used on both OS X and iOS.

You can then proceed to build the library like:

make linux

Style

The default stylesheet at bin/style.js is JSON and is processed into a minified version by the following script:

node bin/build-style.js bin/style.js out/

Note: This is automatically taken care of as a build phase so you are not expected to do this manually.

Usage

Desktop

• Press X to reset the transform
• Press N to reset north
• Press R to toggle styles
• Press Tab to toggle debug information
• Press Esc to quit

Mobile

• Pan to move
• Pinch to zoom
• Use two fingers to rotate
• Double-tap to zoom in one level
• Two-finger single-tap to zoom out one level
• Single-tap to toggle the command palette visibility for resetting north & the transform, toggling debug, toggling styles, and locating the user
• Double-tap, long-pressing the second, then pan up and down to "quick zoom" (iPhone only, meant for one-handed use)

Other notes

Under early development, this project was called LLMR (Low-Level Map Renderer), in case you see any lingering references to it.