80cb05420a
What happened: The excessive `onSpriteLoaded()` notifications were caused by the trick inside `OnlineFileRequest::completed()` implemenation, which causes receving of two file source updates pointing to the *same* data in case the network response is `notModified` and the local storage has the sprite sheet already stored inside. In the SpriteLoader` implementation, it resulted in 2 extra `parseSprite()` calls and 2 extra `onSpriteLoaded()` notifications. Then, the excessive `onSpriteLoaded()` notifications affected style images and all the unnecessarily added image dupes (btw, the amount of these dupes `= 2 * number of style images`) were treated by the `RenderOrchestrator` as *updated* images. Further, `RenderOrchestrator` called `ImageManager::updateImage()` for the updated images and the `ImageManager` populated the `updatedImageVersions` map. Finally, at every frame all the geometry tiles iterated through the `updatedImageVersions` to check whether their uploaded textures needed patching. All the mentioned above had a negative performance impact. The fix: Now, `SpriteLoader` sends `onSpriteLoaded()` notifications only if the data in the file source response is different comparing to the existing one.
Mapbox GL Native
A library for embedding interactive, customizable vector maps into native applications on multiple platforms. It takes stylesheets that conform to the Mapbox Style Specification, applies them to vector tiles that conform to the Mapbox Vector Tile Specification, and renders them using OpenGL or Metal. Mapbox GL JS is the WebGL-based counterpart, designed for use on the Web.
Developing
We use CMake to build Mapbox GL Native for various platforms, including Linux, Android, iOS, macOS and Windows. The following command, executed from the root of this repository tree, will build Mapbox GL Native targeting your host architecture given that you have all the dependencies installed and run the example app.
$ git submodule update --init --recursive
$ cmake . -B build
$ cmake --build build
$ MAPBOX_ACCESS_TOKEN=my_access_token_here ./build/platform/glfw/mbgl-glfw
License
Mapbox GL Native is licensed under the 2-Clause BSD license. The licenses of its dependencies are tracked via FOSSA:
