Introduces "optional" requests. These should be fulfilled by the FileSource only there's a low-cost/easy way to obtain the data (e.g. from a local cache). If the data for an optional request cannot be found, it *must* return a Response object with a NotFound error.
Traditional "required" requests still work the same way, with one change: If you set any prior* field in the Resource (i.e. priorModified, priorEtag, or priorExpires), the DefaultFileSource assumes that you already have the cache value and will not consult the cache before performing the request. If a prior cache lookup didn't turn up any data, and you therefore don't have an Etag or Modified value, you can still skip the cache by setting priorExpires. This will of course always result in a non-conditional HTTP request.
* CanonicalTileID has z, x, and y, with x/y being within the bounds z defines. z can be anything from 0-32.
* OverscaledTileID is composed of a z value, and a canonical tile. The z value indicates the zoom level the tile is intended for. It is primarily used for indexing overscaled data tiles.
* UnwrappedTileID is composed of a wrap value, and a canonical tile. The wrap value is used for representing tiles to the left and right of the main (0/0/0 based) tile pyramid. It is primarily used for indicating the position a tile should be rendered at.
add outlinepattern shader class to relevant files
add outlinepattern code to painter_fill.cpp
add outlinepattern code to fill_bucket
refactor painter_fill, fix tests
fix merge conflicts and setDepthSublayer
update render test to no antialiasing so travis will be happy
There's no need to do the work that OnlineFileRequest does on a separate thread from the DefaultFileSource thread, and having AsyncTasks proxy to other tasks across a thread boundary adds needless complexity.
* Main gyp files are now standardized as platform/<platform>/platform.gyp.
* Each platform gyp file defines appropriate loop_lib and headless_lib variables.
* Each platform gyp file includes mbgl.gypi, which defines base targets which may be useful to all platforms.
* CI targets are consistent across platforms: `make $(PLATFORM) && make test-$(PLATFORM)`.
* Renamed the "linux" test app to "glfw". It's now built in OS X CI.
* Android build flakiness is fixed.
* iOS CI builds the bench and iosapp targets.
* Mesa version is now in one place.
* CI scripts use bash "strict mode" and correct error handling.
* All build output goes to the build directory.
* Removed vestigial iOS/OS X/Android Travis scripts.
- check that sprite metrics are within the bounds of the sprite. fix#714
- make sprite metrics problems Errors instead of Warnings
- check for negative image width, height
