diff options
Diffstat (limited to 'platform/darwin/src')
-rw-r--r-- | platform/darwin/src/MGLTileSource.h | 30 | ||||
-rw-r--r-- | platform/darwin/src/MGLTileSource.mm | 18 |
2 files changed, 48 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLTileSource.h b/platform/darwin/src/MGLTileSource.h index 3dc268db60..2d75fa14d8 100644 --- a/platform/darwin/src/MGLTileSource.h +++ b/platform/darwin/src/MGLTileSource.h @@ -117,6 +117,7 @@ extern MGL_EXPORT const MGLTileSourceOption MGLTileSourceOptionAttributionInfos; */ extern MGL_EXPORT const MGLTileSourceOption MGLTileSourceOptionTileCoordinateSystem; + /** Tile coordinate systems that determine how tile coordinates in tile URLs are interpreted. @@ -141,6 +142,35 @@ typedef NS_ENUM(NSUInteger, MGLTileCoordinateSystem) { MGLTileCoordinateSystemTMS }; + +/** + An `NSNumber` object containing an unsigned integer that specifies the encoding + formula for raster-dem tilesets. The integer corresponds to one of + the constants described in `MGLDEMEncoding`. + + The default value for this option is `MGLDEMEncodingMapbox`. + + This option is not supported by the TileJSON spec. + */ +extern MGL_EXPORT const MGLTileSourceOption MGLTileSourceOptionDEMEncoding; + +/** + The encoding formula used to generate the raster-dem tileset +*/ + +typedef NS_ENUM(NSUInteger, MGLDEMEncoding) { + + /** + Raster tiles generated with the [Mapbox encoding formula](https://www.mapbox.com/help/access-elevation-data/#mapbox-terrain-rgb). + */ + MGLDEMEncodingMapbox = 0, + + /** + Raster tiles generated with the [Mapzen Terrarium encoding formula](https://aws.amazon.com/public-datasets/terrain/). + */ + MGLDEMEncodingTerrarium +}; + /** `MGLTileSource` is a map content source that supplies map tiles to be shown on the map. The location of and metadata about the tiles are defined either by an diff --git a/platform/darwin/src/MGLTileSource.mm b/platform/darwin/src/MGLTileSource.mm index bc985bd728..c37812ab8e 100644 --- a/platform/darwin/src/MGLTileSource.mm +++ b/platform/darwin/src/MGLTileSource.mm @@ -19,6 +19,7 @@ const MGLTileSourceOption MGLTileSourceOptionCoordinateBounds = @"MGLTileSourceO const MGLTileSourceOption MGLTileSourceOptionAttributionHTMLString = @"MGLTileSourceOptionAttributionHTMLString"; const MGLTileSourceOption MGLTileSourceOptionAttributionInfos = @"MGLTileSourceOptionAttributionInfos"; const MGLTileSourceOption MGLTileSourceOptionTileCoordinateSystem = @"MGLTileSourceOptionTileCoordinateSystem"; +const MGLTileSourceOption MGLTileSourceOptionDEMEncoding = @"MGLTileSourceOptionDEMEncoding"; @implementation MGLTileSource @@ -129,5 +130,22 @@ mbgl::Tileset MGLTileSetFromTileURLTemplates(NS_ARRAY_OF(NSString *) *tileURLTem } } + if (NSNumber *demEncodingNumber = options[MGLTileSourceOptionDEMEncoding]) { + if (![demEncodingNumber isKindOfClass:[NSValue class]]) { + [NSException raise:NSInvalidArgumentException + format:@"MGLTileSourceOptionDEMEncoding must be set to an NSValue or NSNumber."]; + } + MGLDEMEncoding demEncoding; + [demEncodingNumber getValue:&demEncoding]; + switch (demEncoding) { + case MGLDEMEncodingMapbox: + tileSet.encoding = mbgl::Tileset::DEMEncoding::Mapbox; + break; + case MGLDEMEncodingTerrarium: + tileSet.encoding = mbgl::Tileset::DEMEncoding::Terrarium; + break; + } + } + return tileSet; } |