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| author | Thiago Marcos P. Santos <thiago@mapbox.com> | 2017-01-15 11:27:52 -0500 |
|---|---|---|
| committer | Thiago Marcos P. Santos <tmpsantos@gmail.com> | 2017-07-07 14:28:52 +0300 |
| commit | 407fbc70b1dc6dab6b7aa5a4b9c57b4e08906c79 (patch) | |
| tree | 1914348d4136449842822f092eaff7d589861e35 /include | |
| parent | 2876db72f2d235a02e5670329c4f8dcb2a65a8ed (diff) | |
| download | qtlocation-mapboxgl-407fbc70b1dc6dab6b7aa5a4b9c57b4e08906c79.tar.gz | |
[core] Prefetch low resolution tiles
Diffstat (limited to 'include')
| -rw-r--r-- | include/mbgl/map/map.hpp | 9 | ||||
| -rw-r--r-- | include/mbgl/util/constants.hpp | 2 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/mbgl/map/map.hpp b/include/mbgl/map/map.hpp index 1b45c87c28..158e9d733d 100644 --- a/include/mbgl/map/map.hpp +++ b/include/mbgl/map/map.hpp @@ -156,6 +156,15 @@ public: AnnotationIDs queryPointAnnotations(const ScreenBox&); + // Tile prefetching + // + // When loading a map, if `PrefetchZoomDelta` is set to any number greater than 0, the map will + // first request a tile for `zoom = getZoom() - delta` in a attempt to display a full map at + // lower resolution as quick as possible. It will get clamped at the tile source minimum zoom. + // The default `delta` is 4. + void setPrefetchZoomDelta(uint8_t delta); + uint8_t getPrefetchZoomDelta() const; + // Memory void onLowMemory(); diff --git a/include/mbgl/util/constants.hpp b/include/mbgl/util/constants.hpp index 14aaa752bc..c2250c6f2e 100644 --- a/include/mbgl/util/constants.hpp +++ b/include/mbgl/util/constants.hpp @@ -38,6 +38,8 @@ constexpr double MAX_ZOOM = 25.5; constexpr float MIN_ZOOM_F = MIN_ZOOM; constexpr float MAX_ZOOM_F = MAX_ZOOM; +constexpr uint8_t DEFAULT_PREFETCH_ZOOM_DELTA = 4; + constexpr uint64_t DEFAULT_MAX_CACHE_SIZE = 50 * 1024 * 1024; constexpr Duration DEFAULT_TRANSITION_DURATION = Milliseconds(300); |