An OpenGL renderer for Mapbox vector tiles, implemented in C++11, targeting iOS & OS X.

Depends

• Modern C++ compiler that supports -std=c++11
• libpng
• libuv
• libcurl (depends on OpenSSL)
• glfw3
• Boost (for Rtree support)
• Python (for build only)
• Node.js (for build only)

Build instructions

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

OS X

Run ./setup_libraries.sh

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

Because libpng isn't included in the iOS SDK, you will need to build a cross-architecture version yourself. Run ./setup_libraries.sh, which is derived from Mapnik's cross-architecture build scripts. This will also run ./configure.

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

Ubuntu

Ensure you have git and other build essentials:

sudo apt-get update
sudo apt-get install git cmake make pkg-config curl automake libtool xutils-dev

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

Build static dependencies:

./setup_libraries.sh

This will automatically run configure for you and set the correct paths.

You can then proceed to build the library, tests or a GLFW app itself.

Style

We're currently embedding the stylesheet JSON in the binary. To create the C++ file and the associated header, run

bin/build-style.js

This is automatically taken care of as a build phase.

Usage

Desktop

• Press 'X' to reset the transform
• Press 'N' to reset north
• Press 'R' to toggle raster
• 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, and toggling raster
• Double-tap, long-pressing the second, then pan up and down to "quick zoom" (iPhone only, meant for one-handed use)