Cache have to be locked by its mutex() while access. More...

#include <TileCache.h>

Inheritance diagram for osmscout::TileCache:

Signals
void	tileRequested (uint32_t zoomLevel, uint32_t x, uint32_t y)

Public Member Functions
void	cleanupCache (uint32_t maxRemove, const std::chrono::milliseconds &maximumLifetime)

void	clearPendingRequests ()
	remove all pending requests TODO: in case of multiple map widgets, add some id to avoid removing requests of another widget

bool	contains (uint32_t zoomLevel, uint32_t x, uint32_t y)

bool	containsRequest (uint32_t zoomLevel, uint32_t x, uint32_t y)

TileCacheVal	get (uint32_t zoomLevel, uint32_t x, uint32_t y)

size_t	getEpoch () const

void	incEpoch ()

bool	invalidate (osmscout::GeoBox box=osmscout::GeoBox())

bool	isRequestQueueEmpty () const

void	mergeAndStartRequests (uint32_t zoomLevel, uint32_t xtile, uint32_t ytile, uint32_t &xFrom, uint32_t &xTo, uint32_t &yFrom, uint32_t &yTo, uint32_t maxWidth, uint32_t maxHeight)

void	put (uint32_t zoomLevel, uint32_t x, uint32_t y, const QImage &image, size_t epoch=0)

bool	reemitRequests ()
	trigger request signal for all pending requests

bool	removeRequest (uint32_t zoomLevel, uint32_t x, uint32_t y)
	Remove pending request.

bool	request (uint32_t zoomLevel, uint32_t x, uint32_t y)
	try to create new tile request.

bool	startRequestProcess (uint32_t zoomLevel, uint32_t x, uint32_t y)

	TileCache (size_t cacheSize)

	~TileCache () override=default

Detailed Description

Cache have to be locked by its mutex() while access.

It owns all inserted tiles and it is responsible for its release

Constructor & Destructor Documentation

◆ TileCache()

osmscout::TileCache::TileCache ( size_t cacheSize )

explicit

◆ ~TileCache()

osmscout::TileCache::~TileCache ( )

overridedefault

Member Function Documentation

◆ cleanupCache()

void osmscout::TileCache::cleanupCache	(	uint32_t	maxRemove,
		const std::chrono::milliseconds &	maximumLifetime
	)

first, we will iterate over all entries and remove up to maxRemove tiles older than maximumLifetime, if no such entry found and size is bigger than cacheSize, remove oldest tile

Goal is to remove more items at once and minimise frequency of this expensive cleaning

References osmscout::TileCacheVal::lastAccess.

Referenced by osmscout::TiledMapOverlay::FlushCaches(), osmscout::TiledMapRenderer::FlushVisualCaches(), put(), and osmscout::TiledMapOverlay::setEnabled().

◆ clearPendingRequests()

void osmscout::TileCache::clearPendingRequests ( )

remove all pending requests TODO: in case of multiple map widgets, add some id to avoid removing requests of another widget

Referenced by osmscout::TiledMapRenderer::onlineTilesEnabledChanged(), osmscout::TiledMapRenderer::onOfflineMapChanged(), osmscout::TileLoaderThread::onProviderChanged(), osmscout::TiledMapOverlay::paint(), and osmscout::TiledMapRenderer::RenderMap().

◆ contains()

bool osmscout::TileCache::contains	(	uint32_t	zoomLevel,
		uint32_t	x,
		uint32_t	y
	)

Referenced by osmscout::TileLoaderThread::tileDownloadFailed(), and osmscout::TiledMapRenderer::tileDownloadFailed().

◆ containsRequest()

bool osmscout::TileCache::containsRequest	(	uint32_t	zoomLevel,
		uint32_t	x,
		uint32_t	y
	)

◆ get()

TileCacheVal osmscout::TileCache::get	(	uint32_t	zoomLevel,
		uint32_t	x,
		uint32_t	y
	)

References osmscout::TileCacheVal::lastAccess.

◆ getEpoch()

size_t osmscout::TileCache::getEpoch ( ) const

inline

Referenced by osmscout::TiledMapRenderer::offlineTileRequest(), and osmscout::TiledMapRenderer::onLoadJobFinished().

◆ incEpoch()

void osmscout::TileCache::incEpoch ( )

inline

Referenced by osmscout::TiledMapRenderer::InvalidateVisualCache(), osmscout::TiledMapRenderer::onDatabaseLoaded(), and osmscout::TiledMapRenderer::onOfflineMapChanged().

◆ invalidate()

bool osmscout::TileCache::invalidate ( osmscout::GeoBox box = osmscout::GeoBox() )

Parameters

box

Returns

References osmscout::GeoBox::Intersects(), osmscout::GeoBox::IsValid(), osmscout::OSMTile::tileBoundingBox(), osmscout::TileCacheKey::xtile, osmscout::TileCacheKey::ytile, and osmscout::TileCacheKey::zoomLevel.

Referenced by osmscout::TiledMapRenderer::onDatabaseLoaded(), osmscout::TiledMapRenderer::onlineTileProviderChanged(), osmscout::TiledMapRenderer::onlineTilesEnabledChanged(), osmscout::TiledMapRenderer::onOfflineMapChanged(), and osmscout::TileLoaderThread::onProviderChanged().

◆ isRequestQueueEmpty()

bool osmscout::TileCache::isRequestQueueEmpty ( ) const

Referenced by osmscout::TiledMapRenderer::RenderMap().

◆ mergeAndStartRequests()

void osmscout::TileCache::mergeAndStartRequests	(	uint32_t	zoomLevel,
		uint32_t	xtile,
		uint32_t	ytile,
		uint32_t &	xFrom,
		uint32_t &	xTo,
		uint32_t &	yFrom,
		uint32_t &	yTo,
		uint32_t	maxWidth,
		uint32_t	maxHeight
	)