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author | Asheem Mamoowala <asheem.mamoowala@mapbox.com> | 2017-09-01 16:33:35 -0700 |
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committer | Asheem Mamoowala <asheem.mamoowala@mapbox.com> | 2017-09-08 17:38:42 -0700 |
commit | 50fd9175109e01c5286d3363df21aeba6e89087b (patch) | |
tree | 2f3dfada2896159f3eef64aa3f02ac231742d8a7 /platform/default | |
parent | aa4dff1095e8f5e8ad584f5f7dcab3e61d8cf8ee (diff) | |
download | qtlocation-mapboxgl-50fd9175109e01c5286d3363df21aeba6e89087b.tar.gz |
Fast tileCount with help from @mapbox/sphericalmercator module
Diffstat (limited to 'platform/default')
-rw-r--r-- | platform/default/mbgl/storage/offline.cpp | 33 | ||||
-rw-r--r-- | platform/default/mbgl/storage/offline_download.cpp | 4 |
2 files changed, 27 insertions, 10 deletions
diff --git a/platform/default/mbgl/storage/offline.cpp b/platform/default/mbgl/storage/offline.cpp index fd2d47819b..644684c8a6 100644 --- a/platform/default/mbgl/storage/offline.cpp +++ b/platform/default/mbgl/storage/offline.cpp @@ -1,6 +1,7 @@ #include <mbgl/storage/offline.hpp> #include <mbgl/util/tile_cover.hpp> #include <mbgl/util/tileset.hpp> +#include <mbgl/util/projection.hpp> #include <rapidjson/document.h> #include <rapidjson/stringbuffer.h> @@ -24,17 +25,11 @@ OfflineTilePyramidRegionDefinition::OfflineTilePyramidRegionDefinition( } std::vector<CanonicalTileID> OfflineTilePyramidRegionDefinition::tileCover(SourceType type, uint16_t tileSize, const Range<uint8_t>& zoomRange) const { - double minZ = std::max<double>(util::coveringZoomLevel(minZoom, type, tileSize), zoomRange.min); - double maxZ = std::min<double>(util::coveringZoomLevel(maxZoom, type, tileSize), zoomRange.max); - - assert(minZ >= 0); - assert(maxZ >= 0); - assert(minZ < std::numeric_limits<uint8_t>::max()); - assert(maxZ < std::numeric_limits<uint8_t>::max()); + const Range<uint8_t> clampedZoomRange = coveringZoomRange(type, tileSize, zoomRange); std::vector<CanonicalTileID> result; - for (uint8_t z = minZ; z <= maxZ; z++) { + for (uint8_t z = clampedZoomRange.min; z <= clampedZoomRange.max; z++) { for (const auto& tile : util::tileCover(bounds, z)) { result.emplace_back(tile.canonical); } @@ -43,6 +38,28 @@ std::vector<CanonicalTileID> OfflineTilePyramidRegionDefinition::tileCover(Sourc return result; } +unsigned long OfflineTilePyramidRegionDefinition::tileCount(SourceType type, uint16_t tileSize, const Range<uint8_t>& zoomRange) const { + + const Range<uint8_t> clampedZoomRange = coveringZoomRange(type, tileSize, zoomRange); + unsigned long result = 0;; + for (uint8_t z = clampedZoomRange.min; z <= clampedZoomRange.max; z++) { + result += util::tileCount(bounds, z, tileSize); + } + + return result; +} + +Range<uint8_t> OfflineTilePyramidRegionDefinition::coveringZoomRange(SourceType type, uint16_t tileSize, const Range<uint8_t>& zoomRange) const { + double minZ = std::max<double>(util::coveringZoomLevel(minZoom, type, tileSize), zoomRange.min); + double maxZ = std::min<double>(util::coveringZoomLevel(maxZoom, type, tileSize), zoomRange.max); + + assert(minZ >= 0); + assert(maxZ >= 0); + assert(minZ < std::numeric_limits<uint8_t>::max()); + assert(maxZ < std::numeric_limits<uint8_t>::max()); + return { static_cast<uint8_t>(minZ), static_cast<uint8_t>(maxZ) }; +} + OfflineRegionDefinition decodeOfflineRegionDefinition(const std::string& region) { rapidjson::GenericDocument<rapidjson::UTF8<>, rapidjson::CrtAllocator> doc; doc.Parse<0>(region.c_str()); diff --git a/platform/default/mbgl/storage/offline_download.cpp b/platform/default/mbgl/storage/offline_download.cpp index 7f0001f64b..ff61114888 100644 --- a/platform/default/mbgl/storage/offline_download.cpp +++ b/platform/default/mbgl/storage/offline_download.cpp @@ -80,7 +80,7 @@ OfflineRegionStatus OfflineDownload::getStatus() const { auto handleTiledSource = [&] (const variant<std::string, Tileset>& urlOrTileset, const uint16_t tileSize) { if (urlOrTileset.is<Tileset>()) { result.requiredResourceCount += - definition.tileCover(type, tileSize, urlOrTileset.get<Tileset>().zoomRange).size(); + definition.tileCount(type, tileSize, urlOrTileset.get<Tileset>().zoomRange); } else { result.requiredResourceCount += 1; const auto& url = urlOrTileset.get<std::string>(); @@ -90,7 +90,7 @@ OfflineRegionStatus OfflineDownload::getStatus() const { optional<Tileset> tileset = style::conversion::convertJSON<Tileset>(*sourceResponse->data, error); if (tileset) { result.requiredResourceCount += - definition.tileCover(type, tileSize, (*tileset).zoomRange).size(); + definition.tileCount(type, tileSize, (*tileset).zoomRange); } } else { result.requiredResourceCountIsPrecise = false; |