bool CacheTileHandler::handleTile(const TileKey& key, const TileVisitor& tv)
{
ImageLayer* imageLayer = dynamic_cast< ImageLayer* >( _layer.get() );
ElevationLayer* elevationLayer = dynamic_cast< ElevationLayer* >( _layer.get() );
// Just call createImage or createHeightField on the layer and the it will be cached!
if (imageLayer)
{
GeoImage image = imageLayer->createImage( key );
if (image.valid())
{
return true;
}
}
else if (elevationLayer )
{
GeoHeightField hf = elevationLayer->createHeightField(key, 0L);
if (hf.valid())
{
return true;
}
}
// If we didn't produce a result but the key isn't within range then we should continue to
// traverse the children b/c a min level was set.
if (!_layer->isKeyInLegalRange(key))
{
return true;
}
return false;
}
bool
OSGTileFactory::createValidGeoImage(ImageLayer* layer,
const TileKey& key,
GeoImage& out_image,
TileKey& out_actualTileKey,
ProgressCallback* progress)
{
//TODO: Redo this to just grab images from the parent TerrainTiles
//Try to create the image with the given key
out_actualTileKey = key;
while (out_actualTileKey.valid())
{
if ( layer->isKeyValid(out_actualTileKey) )
{
out_image = layer->createImage( out_actualTileKey, progress );
if ( out_image.valid() )
{
return true;
}
}
out_actualTileKey = out_actualTileKey.createParentKey();
}
return false;
}
// override
// Creates an image.
osg::Image* createImage(const TileKey& key,
ProgressCallback* progress )
{
if ( !_imageLayer.valid() || !_featureSource.valid() )
return 0L;
// fetch the image for this key:
GeoImage image = _imageLayer->createImage(key, progress);
if ( !image.valid() )
return 0L;
// fetch a set of features for this key. The features are in their
// own SRS, so we need to transform:
const SpatialReference* featureSRS = _featureSource->getFeatureProfile()->getSRS();
GeoExtent extentInFeatureSRS = key.getExtent().transform( featureSRS );
// assemble a spatial query. It helps if your features have a spatial index.
Query query;
query.bounds() = extentInFeatureSRS.bounds();
//query.expression() = ... // SQL expression compatible with data source
osg::ref_ptr<FeatureCursor> cursor = _featureSource->createFeatureCursor(query);
// create a new image to return.
osg::Image* output = new osg::Image();
//output->allocateImage(128, 128, 1, GL_RGB, GL_UNSIGNED_BYTE);
// do your magic here.
return output;
}
bool
CacheSeed::cacheTile(const MapFrame& mapf, const TileKey& key ) const
{
bool gotData = false;
for( ImageLayerVector::const_iterator i = mapf.imageLayers().begin(); i != mapf.imageLayers().end(); i++ )
{
ImageLayer* layer = i->get();
if ( layer->isKeyValid( key ) )
{
GeoImage image = layer->createImage( key );
if ( image.valid() )
gotData = true;
}
}
if ( mapf.elevationLayers().size() > 0 )
{
osg::ref_ptr<osg::HeightField> hf;
mapf.getHeightField( key, false, hf );
if ( hf.valid() )
gotData = true;
}
return gotData;
}
bool handleTile(const TileKey& key)
{
bool ok = false;
GeoImage image = _source->createImage(key);
if ( image.valid() )
ok = _dest->storeImage(key, image.getImage(), 0L);
return ok;
}
osg::Image*
createImage( const TileKey& key, ProgressCallback* progress )
{
if ( !_image.valid() || key.getLevelOfDetail() > getMaxDataLevel() )
return NULL;
GeoImage cropped = _image.crop( key.getExtent(), true, getPixelsPerTile(), getPixelsPerTile() );
return cropped.valid() ? cropped.takeImage() : 0L;
}
void execute()
{
GeoImage geoImage;
bool isFallbackData = false;
// fetch the image from the layer, falling back on parent keys utils we are
// able to find one that works.
TileKey imageKey( _key );
while( !geoImage.valid() && imageKey.valid() && _layer->isKeyValid(imageKey) )
{
geoImage = _layer->createImage( imageKey, 0L ); // TODO: include a progress callback?
if ( !geoImage.valid() )
{
imageKey = imageKey.createParentKey();
isFallbackData = true;
}
}
GeoLocator* locator = 0L;
if ( !geoImage.valid() )
{
// no image found, so make an empty one (one pixel alpha).
geoImage = GeoImage( ImageUtils::createEmptyImage(), _key.getExtent() );
locator = GeoLocator::createForKey( _key, *_mapInfo );
isFallbackData = true;
}
else
{
locator = GeoLocator::createForExtent(geoImage.getExtent(), *_mapInfo);
}
// add the color layer to the repo.
_repo->add( CustomColorLayer(
_layer,
geoImage.getImage(),
locator,
_key.getLevelOfDetail(),
_key,
isFallbackData ) );
}
CustomColorLayerRef*
OSGTileFactory::createImageLayer(const MapInfo& mapInfo,
ImageLayer* layer,
const TileKey& key,
ProgressCallback* progress)
{
if ( !layer )
return 0L;
GeoImage geoImage;
//If the key is valid, try to get the image from the MapLayer
bool keyValid = layer->isKeyValid( key );
if ( keyValid )
{
geoImage = layer->createImage(key, progress);
}
else
{
//If the key is not valid, simply make a transparent tile
geoImage = GeoImage(ImageUtils::createEmptyImage(), key.getExtent());
}
if (geoImage.valid())
{
osg::ref_ptr<GeoLocator> imgLocator = GeoLocator::createForKey( key, mapInfo );
if ( mapInfo.isGeocentric() )
imgLocator->setCoordinateSystemType( osgTerrain::Locator::GEOCENTRIC );
return new CustomColorLayerRef( CustomColorLayer(
layer,
geoImage.getImage(),
imgLocator.get(),
key.getLevelOfDetail(),
key) );
}
return NULL;
}
bool CacheTileHandler::handleTile( const TileKey& key )
{
ImageLayer* imageLayer = dynamic_cast< ImageLayer* >( _layer.get() );
ElevationLayer* elevationLayer = dynamic_cast< ElevationLayer* >( _layer.get() );
// Just call createImage or createHeightField on the layer and the it will be cached!
if (imageLayer)
{
GeoImage image = imageLayer->createImage( key );
if (image.valid())
{
return true;
}
}
else if (elevationLayer )
{
GeoHeightField hf = elevationLayer->createHeightField( key );
if (hf.valid())
{
return true;
}
}
return false;
}
GeoImage
ImageLayer::createImageInKeyProfile( const TileKey& key, ProgressCallback* progress, bool forceFallback, bool& out_isFallback )
{
GeoImage result;
out_isFallback = false;
// If the layer is disabled, bail out.
if ( !getEnabled() )
{
return GeoImage::INVALID;
}
// Check the max data level, which limits the LOD of available data.
if ( _runtimeOptions.maxDataLevel().isSet() && key.getLOD() > _runtimeOptions.maxDataLevel().value() )
{
return GeoImage::INVALID;
}
// Check for a "Minumum level" setting on this layer. If we are before the
// min level, just return the empty image. Do not cache empties
if ( _runtimeOptions.minLevel().isSet() && key.getLOD() < _runtimeOptions.minLevel().value() )
{
return GeoImage( _emptyImage.get(), key.getExtent() );
}
// Check for a "Minimum resolution" setting on the layer. If we are before the
// min resolution, return the empty image. Do not cache empties.
if ( _runtimeOptions.minResolution().isSet() )
{
double keyres = key.getExtent().width() / getTileSize();
double keyresInLayerProfile = key.getProfile()->getSRS()->transformUnits(keyres, getProfile()->getSRS());
if ( keyresInLayerProfile > _runtimeOptions.minResolution().value() )
{
return GeoImage( _emptyImage.get(), key.getExtent() );
}
}
OE_DEBUG << LC << "create image for \"" << key.str() << "\", ext= "
<< key.getExtent().toString() << std::endl;
// locate the cache bin for the target profile for this layer:
CacheBin* cacheBin = getCacheBin( key.getProfile() );
// validate that we have either a valid tile source, or we're cache-only.
if ( ! (getTileSource() || (isCacheOnly() && cacheBin) ) )
{
OE_WARN << LC << "Error: layer does not have a valid TileSource, cannot create image " << std::endl;
_runtimeOptions.enabled() = false;
return GeoImage::INVALID;
}
// validate the existance of a valid layer profile (unless we're in cache-only mode, in which
// case there is no layer profile)
if ( !isCacheOnly() && !getProfile() )
{
OE_WARN << LC << "Could not establish a valid profile" << std::endl;
_runtimeOptions.enabled() = false;
return GeoImage::INVALID;
}
// First, attempt to read from the cache. Since the cached data is stored in the
// map profile, we can try this first.
if ( cacheBin && getCachePolicy().isCacheReadable() )
{
ReadResult r = cacheBin->readImage( key.str(), getCachePolicy().getMinAcceptTime() );
if ( r.succeeded() )
{
ImageUtils::normalizeImage( r.getImage() );
return GeoImage( r.releaseImage(), key.getExtent() );
}
//else if ( r.code() == ReadResult::RESULT_EXPIRED )
//{
// OE_INFO << LC << getName() << " : " << key.str() << " record expired!" << std::endl;
//}
}
// The data was not in the cache. If we are cache-only, fail sliently
if ( isCacheOnly() )
{
return GeoImage::INVALID;
}
// Get an image from the underlying TileSource.
result = createImageFromTileSource( key, progress, forceFallback, out_isFallback );
// Normalize the image if necessary
if ( result.valid() )
{
ImageUtils::normalizeImage( result.getImage() );
}
// If we got a result, the cache is valid and we are caching in the map profile, write to the map cache.
if (result.valid() &&
//JB: Removed the check to not write out fallback data. If you have a low resolution base dataset (max lod 3) and a high resolution insert (max lod 22)
// then the low res data needs to "fallback" from LOD 4 - 22 so you can display the high res inset. If you don't cache these intermediate tiles then
// performance can suffer generating all those fallback tiles, especially if you have to do reprojection or mosaicing.
//!out_isFallback &&
cacheBin &&
getCachePolicy().isCacheWriteable() )
{
if ( key.getExtent() != result.getExtent() )
{
OE_INFO << LC << "WARNING! mismatched extents." << std::endl;
}
cacheBin->write( key.str(), result.getImage() );
//OE_INFO << LC << "WRITING " << key.str() << " to the cache." << std::endl;
}
if ( result.valid() )
{
OE_DEBUG << LC << key.str() << " result OK" << std::endl;
}
else
{
OE_DEBUG << LC << key.str() << "result INVALID" << std::endl;
}
return result;
}
void
OSGTerrainEngineNode::addImageLayer( ImageLayer* layerAdded )
{
if ( !layerAdded )
return;
if (!_isStreaming)
{
refresh();
}
else
{
// visit all existing terrain tiles and inform each one of the new image layer:
TileVector tiles;
_terrain->getTiles( tiles );
for( TileVector::iterator itr = tiles.begin(); itr != tiles.end(); ++itr )
{
Tile* tile = itr->get();
StreamingTile* streamingTile = 0L;
GeoImage geoImage;
bool needToUpdateImagery = false;
int imageLOD = -1;
if ( !_isStreaming || tile->getKey().getLevelOfDetail() == 1 )
{
// in standard mode, or at the first LOD in seq/pre mode, fetch the image immediately.
TileKey geoImageKey = tile->getKey();
_tileFactory->createValidGeoImage( layerAdded, tile->getKey(), geoImage, geoImageKey );
imageLOD = tile->getKey().getLevelOfDetail();
}
else
{
// in seq/pre mode, set up a placeholder and mark the tile as dirty.
geoImage = GeoImage(ImageUtils::createEmptyImage(), tile->getKey().getExtent() );
needToUpdateImagery = true;
streamingTile = static_cast<StreamingTile*>(tile);
}
if (geoImage.valid())
{
const MapInfo& mapInfo = _update_mapf->getMapInfo();
double img_min_lon, img_min_lat, img_max_lon, img_max_lat;
geoImage.getExtent().getBounds(img_min_lon, img_min_lat, img_max_lon, img_max_lat);
//Specify a new locator for the color with the coordinates of the TileKey that was actually used to create the image
osg::ref_ptr<GeoLocator> img_locator = tile->getKey().getProfile()->getSRS()->createLocator(
img_min_lon, img_min_lat, img_max_lon, img_max_lat,
!mapInfo.isGeocentric() );
//Set the CS to geocentric if we are dealing with a geocentric map
if ( mapInfo.isGeocentric() )
{
img_locator->setCoordinateSystemType( osgTerrain::Locator::GEOCENTRIC );
}
tile->setCustomColorLayer( CustomColorLayer(
layerAdded,
geoImage.getImage(),
img_locator.get(), imageLOD, tile->getKey() ) );
// if necessary, tell the tile to queue up a new imagery request (since we
// just installed a placeholder)
if ( needToUpdateImagery )
{
streamingTile->updateImagery( layerAdded, *_update_mapf, _tileFactory.get() );
}
}
else
{
// this can happen if there's no data in the new layer for the given tile.
// we will rely on the driver to dump out a warning if this is an error.
}
tile->applyImmediateTileUpdate( TileUpdate::ADD_IMAGE_LAYER, layerAdded->getUID() );
}
updateTextureCombining();
}
}
FeatureCursor* createFeatureCursor( const Symbology::Query& query )
{
TileKey key = *query.tileKey();
#if 0
// Debug
Polygon* poly = new Polygon();
poly->push_back(key.getExtent().xMin(), key.getExtent().yMin());
poly->push_back(key.getExtent().xMax(), key.getExtent().yMin());
poly->push_back(key.getExtent().xMax(), key.getExtent().yMax());
poly->push_back(key.getExtent().xMin(), key.getExtent().yMax());
FeatureList features;
Feature* feature = new Feature(poly, SpatialReference::create("wgs84"));
features.push_back( feature );
return new FeatureListCursor( features );
#else
osg::ref_ptr< osgEarth::ImageLayer > layer = query.getMap()->getImageLayerByName(*_options.layer());
if (layer.valid())
{
GeoImage image = layer->createImage( key );
FeatureList features;
if (image.valid())
{
double pixWidth = key.getExtent().width() / (double)image.getImage()->s();
double pixHeight = key.getExtent().height() / (double)image.getImage()->t();
ImageUtils::PixelReader reader(image.getImage());
for (unsigned int r = 0; r < image.getImage()->t(); r++)
{
double y = key.getExtent().yMin() + (double)r * pixHeight;
double minX = 0;
double maxX = 0;
float value = 0.0;
for (unsigned int c = 0; c < image.getImage()->s(); c++)
{
double x = key.getExtent().xMin() + (double)c * pixWidth;
osg::Vec4f color = reader(c, r);
// Starting a new row. Initialize the values.
if (c == 0)
{
minX = x;
maxX = x + pixWidth;
value = color.r();
}
// Ending a row, finish the polygon.
else if (c == image.getImage()->s() -1)
{
// Increment the maxX to finish the row.
maxX = x + pixWidth;
Polygon* poly = new Polygon();
poly->push_back(minX, y);
poly->push_back(maxX, y);
poly->push_back(maxX, y+pixHeight);
poly->push_back(minX, y+pixHeight);
Feature* feature = new Feature(poly, SpatialReference::create("wgs84"));
feature->set(*_options.attribute(), value);
features.push_back( feature );
minX = x;
maxX = x + pixWidth;
value = color.r();
}
// The value is different, so complete the polygon and start a new one.
else if (color.r() != value)
{
Polygon* poly = new Polygon();
poly->push_back(minX, y);
poly->push_back(maxX, y);
poly->push_back(maxX, y+pixHeight);
poly->push_back(minX, y+pixHeight);
Feature* feature = new Feature(poly, SpatialReference::create("wgs84"));
feature->set(*_options.attribute(), value);
features.push_back( feature );
minX = x;
maxX = x + pixWidth;
value = color.r();
}
// The value is the same as the previous value, continue the polygon by increasing the maxX.
else if (color.r() == value)
{
maxX = x + pixWidth;
}
}
}
if (!features.empty())
{
//OE_NOTICE << LC << "Returning " << features.size() << " features" << std::endl;
return new FeatureListCursor( features );
}
}
}
else
{
OE_NOTICE << LC << "Couldn't get layer " << *_options.layer() << std::endl;
}
return 0;
#endif
}
GeoImage
ImageLayer::createImageInKeyProfile(const TileKey& key,
ProgressCallback* progress)
{
GeoImage result;
// If the layer is disabled, bail out.
if ( !getEnabled() )
{
return GeoImage::INVALID;
}
// Make sure the request is in range.
if ( !isKeyInRange(key) )
{
return GeoImage::INVALID;
}
OE_DEBUG << LC << "create image for \"" << key.str() << "\", ext= "
<< key.getExtent().toString() << std::endl;
// Check the layer L2 cache first
if ( _memCache.valid() )
{
CacheBin* bin = _memCache->getOrCreateBin( key.getProfile()->getFullSignature() );
ReadResult result = bin->readObject(key.str(), 0);
if ( result.succeeded() )
return GeoImage(static_cast<osg::Image*>(result.releaseObject()), key.getExtent());
//_memCache->dumpStats(key.getProfile()->getFullSignature());
}
// locate the cache bin for the target profile for this layer:
CacheBin* cacheBin = getCacheBin( key.getProfile() );
// validate that we have either a valid tile source, or we're cache-only.
if ( ! (getTileSource() || (isCacheOnly() && cacheBin) ) )
{
OE_WARN << LC << "Error: layer does not have a valid TileSource, cannot create image " << std::endl;
_runtimeOptions.enabled() = false;
return GeoImage::INVALID;
}
// validate the existance of a valid layer profile (unless we're in cache-only mode, in which
// case there is no layer profile)
if ( !isCacheOnly() && !getProfile() )
{
OE_WARN << LC << "Could not establish a valid profile" << std::endl;
_runtimeOptions.enabled() = false;
return GeoImage::INVALID;
}
// First, attempt to read from the cache. Since the cached data is stored in the
// map profile, we can try this first.
if ( cacheBin && getCachePolicy().isCacheReadable() )
{
ReadResult r = cacheBin->readImage( key.str(), getCachePolicy().getMinAcceptTime() );
if ( r.succeeded() )
{
ImageUtils::normalizeImage( r.getImage() );
return GeoImage( r.releaseImage(), key.getExtent() );
}
}
// The data was not in the cache. If we are cache-only, fail sliently
if ( isCacheOnly() )
{
return GeoImage::INVALID;
}
// Get an image from the underlying TileSource.
result = createImageFromTileSource( key, progress );
// Normalize the image if necessary
if ( result.valid() )
{
ImageUtils::normalizeImage( result.getImage() );
}
// memory cache first:
if ( result.valid() && _memCache.valid() )
{
CacheBin* bin = _memCache->getOrCreateBin( key.getProfile()->getFullSignature() );
bin->write(key.str(), result.getImage());
}
// If we got a result, the cache is valid and we are caching in the map profile,
// write to the map cache.
if (result.valid() &&
cacheBin &&
getCachePolicy().isCacheWriteable() )
{
if ( key.getExtent() != result.getExtent() )
{
OE_INFO << LC << "WARNING! mismatched extents." << std::endl;
}
cacheBin->write( key.str(), result.getImage() );
}
if ( result.valid() )
{
OE_DEBUG << LC << key.str() << " result OK" << std::endl;
}
else
{
OE_DEBUG << LC << key.str() << "result INVALID" << std::endl;
}
return result;
}
void execute()
{
GeoImage geoImage;
bool isFallbackData = false;
bool useMercatorFastPath =
_opt->enableMercatorFastPath() != false &&
_mapInfo->isGeocentric() &&
_layer->getProfile() &&
_layer->getProfile()->getSRS()->isSphericalMercator();
// fetch the image from the layer, falling back on parent keys utils we are
// able to find one that works.
bool autoFallback = _key.getLevelOfDetail() <= 1;
TileKey imageKey( _key );
TileSource* tileSource = _layer->getTileSource();
const Profile* layerProfile = _layer->getProfile();
//Only try to get data from the source if it actually intersects the key extent
bool hasDataInExtent = true;
if (tileSource && layerProfile)
{
GeoExtent ext = _key.getExtent();
if (!layerProfile->getSRS()->isEquivalentTo( ext.getSRS()))
{
ext = layerProfile->clampAndTransformExtent( ext );
}
hasDataInExtent = ext.isValid() && tileSource->hasDataInExtent( ext );
}
if (hasDataInExtent)
{
while( !geoImage.valid() && imageKey.valid() && _layer->isKeyValid(imageKey) )
{
if ( useMercatorFastPath )
{
bool mercFallbackData = false;
geoImage = _layer->createImageInNativeProfile( imageKey, 0L, autoFallback, mercFallbackData );
if ( geoImage.valid() && mercFallbackData )
{
isFallbackData = true;
}
}
else
{
geoImage = _layer->createImage( imageKey, 0L, autoFallback );
}
if ( !geoImage.valid() )
{
imageKey = imageKey.createParentKey();
isFallbackData = true;
}
}
}
GeoLocator* locator = 0L;
if ( !geoImage.valid() )
{
// no image found, so make an empty one (one pixel alpha).
geoImage = GeoImage( ImageUtils::createEmptyImage(), _key.getExtent() );
locator = GeoLocator::createForKey( _key, *_mapInfo );
isFallbackData = true;
}
else
{
if ( useMercatorFastPath )
locator = new MercatorLocator(geoImage.getExtent());
else
locator = GeoLocator::createForExtent(geoImage.getExtent(), *_mapInfo);
}
bool isStreaming = _opt->loadingPolicy()->mode() == LoadingPolicy::MODE_PREEMPTIVE || _opt->loadingPolicy()->mode() == LoadingPolicy::MODE_SEQUENTIAL;
if (geoImage.getImage() && isStreaming)
{
// protected against multi threaded access. This is a requirement in sequential/preemptive mode,
// for example. This used to be in TextureCompositorTexArray::prepareImage.
// TODO: review whether this affects performance.
geoImage.getImage()->setDataVariance( osg::Object::DYNAMIC );
}
// add the color layer to the repo.
_repo->add( CustomColorLayer(
_layer,
geoImage.getImage(),
locator,
_key.getLevelOfDetail(),
_key,
isFallbackData ) );
}
void
TerrainTileModelFactory::addColorLayers(TerrainTileModel* model,
const Map* map,
const TerrainEngineRequirements* reqs,
const TileKey& key,
const CreateTileModelFilter& filter,
ProgressCallback* progress)
{
OE_START_TIMER(fetch_image_layers);
int order = 0;
LayerVector layers;
map->getLayers(layers);
for (LayerVector::const_iterator i = layers.begin(); i != layers.end(); ++i)
{
Layer* layer = i->get();
if (layer->getRenderType() != layer->RENDERTYPE_TERRAIN_SURFACE)
continue;
if (!layer->getEnabled())
continue;
if (!filter.accept(layer))
continue;
ImageLayer* imageLayer = dynamic_cast<ImageLayer*>(layer);
if (imageLayer)
{
osg::Texture* tex = 0L;
osg::Matrixf textureMatrix;
if (imageLayer->isKeyInLegalRange(key) && imageLayer->mayHaveDataInExtent(key.getExtent()))
{
if (imageLayer->createTextureSupported())
{
tex = imageLayer->createTexture( key, progress, textureMatrix );
}
else
{
GeoImage geoImage = imageLayer->createImage( key, progress );
if ( geoImage.valid() )
{
if ( imageLayer->isCoverage() )
tex = createCoverageTexture(geoImage.getImage(), imageLayer);
else
tex = createImageTexture(geoImage.getImage(), imageLayer);
}
}
}
// if this is the first LOD, and the engine requires that the first LOD
// be populated, make an empty texture if we didn't get one.
if (tex == 0L &&
_options.firstLOD() == key.getLOD() &&
reqs && reqs->fullDataAtFirstLodRequired())
{
tex = _emptyTexture.get();
}
if (tex)
{
tex->setName(model->getKey().str());
TerrainTileImageLayerModel* layerModel = new TerrainTileImageLayerModel();
layerModel->setImageLayer(imageLayer);
layerModel->setTexture(tex);
layerModel->setMatrix(new osg::RefMatrixf(textureMatrix));
model->colorLayers().push_back(layerModel);
if (imageLayer->isShared())
{
model->sharedLayers().push_back(layerModel);
}
if (imageLayer->isDynamic())
{
model->setRequiresUpdateTraverse(true);
}
}
}
else // non-image kind of TILE layer:
{
TerrainTileColorLayerModel* colorModel = new TerrainTileColorLayerModel();
colorModel->setLayer(layer);
model->colorLayers().push_back(colorModel);
}
}
if (progress)
progress->stats()["fetch_imagery_time"] += OE_STOP_TIMER(fetch_image_layers);
}
GeoImage
ImageLayer::assembleImageFromTileSource(const TileKey& key,
ProgressCallback* progress)
{
GeoImage mosaicedImage, result;
// Scale the extent if necessary to apply an "edge buffer"
GeoExtent ext = key.getExtent();
if ( _runtimeOptions.edgeBufferRatio().isSet() )
{
double ratio = _runtimeOptions.edgeBufferRatio().get();
ext.scale(ratio, ratio);
}
// Get a set of layer tiles that intersect the requested extent.
std::vector<TileKey> intersectingKeys;
getProfile()->getIntersectingTiles( key, intersectingKeys );
if ( intersectingKeys.size() > 0 )
{
double dst_minx, dst_miny, dst_maxx, dst_maxy;
key.getExtent().getBounds(dst_minx, dst_miny, dst_maxx, dst_maxy);
// if we find at least one "real" tile in the mosaic, then the whole result tile is
// "real" (i.e. not a fallback tile)
bool retry = false;
ImageMosaic mosaic;
// keep track of failed tiles.
std::vector<TileKey> failedKeys;
for( std::vector<TileKey>::iterator k = intersectingKeys.begin(); k != intersectingKeys.end(); ++k )
{
GeoImage image = createImageFromTileSource( *k, progress );
if ( image.valid() )
{
if ( !isCoverage() )
{
ImageUtils::fixInternalFormat(image.getImage());
// Make sure all images in mosaic are based on "RGBA - unsigned byte" pixels.
// This is not the smarter choice (in some case RGB would be sufficient) but
// it ensure consistency between all images / layers.
//
// The main drawback is probably the CPU memory foot-print which would be reduced by allocating RGB instead of RGBA images.
// On GPU side, this should not change anything because of data alignements : often RGB and RGBA textures have the same memory footprint
//
if ( (image.getImage()->getDataType() != GL_UNSIGNED_BYTE)
|| (image.getImage()->getPixelFormat() != GL_RGBA) )
{
osg::ref_ptr<osg::Image> convertedImg = ImageUtils::convertToRGBA8(image.getImage());
if (convertedImg.valid())
{
image = GeoImage(convertedImg, image.getExtent());
}
}
}
mosaic.getImages().push_back( TileImage(image.getImage(), *k) );
}
else
{
// the tile source did not return a tile, so make a note of it.
failedKeys.push_back( *k );
if (progress && (progress->isCanceled() || progress->needsRetry()))
{
retry = true;
break;
}
}
}
if ( mosaic.getImages().empty() || retry )
{
// if we didn't get any data, fail.
OE_DEBUG << LC << "Couldn't create image for ImageMosaic " << std::endl;
return GeoImage::INVALID;
}
// We got at least one good tile, so go through the bad ones and try to fall back on
// lower resolution data to fill in the gaps. The entire mosaic must be populated or
// this qualifies as a bad tile.
for(std::vector<TileKey>::iterator k = failedKeys.begin(); k != failedKeys.end(); ++k)
{
GeoImage image;
for(TileKey parentKey = k->createParentKey();
parentKey.valid() && !image.valid();
parentKey = parentKey.createParentKey())
{
image = createImageFromTileSource( parentKey, progress );
if ( image.valid() )
{
GeoImage cropped;
if ( !isCoverage() )
{
ImageUtils::fixInternalFormat(image.getImage());
if ( (image.getImage()->getDataType() != GL_UNSIGNED_BYTE)
|| (image.getImage()->getPixelFormat() != GL_RGBA) )
{
osg::ref_ptr<osg::Image> convertedImg = ImageUtils::convertToRGBA8(image.getImage());
if (convertedImg.valid())
{
image = GeoImage(convertedImg, image.getExtent());
}
}
cropped = image.crop( k->getExtent(), false, image.getImage()->s(), image.getImage()->t() );
}
else
{
// TODO: may not work.... test; tilekey extent will <> cropped extent
cropped = image.crop( k->getExtent(), true, image.getImage()->s(), image.getImage()->t(), false );
}
// and queue it.
mosaic.getImages().push_back( TileImage(cropped.getImage(), *k) );
}
}
if ( !image.valid() )
{
// a tile completely failed, even with fallback. Eject.
OE_DEBUG << LC << "Couldn't fallback on tiles for ImageMosaic" << std::endl;
// let it go. The empty areas will be filled with alpha by ImageMosaic.
}
}
// all set. Mosaic all the images together.
double rxmin, rymin, rxmax, rymax;
mosaic.getExtents( rxmin, rymin, rxmax, rymax );
mosaicedImage = GeoImage(
mosaic.createImage(),
GeoExtent( getProfile()->getSRS(), rxmin, rymin, rxmax, rymax ) );
}
else
{
OE_DEBUG << LC << "assembleImageFromTileSource: no intersections (" << key.str() << ")" << std::endl;
}
// Final step: transform the mosaic into the requesting key's extent.
if ( mosaicedImage.valid() )
{
// GeoImage::reproject() will automatically crop the image to the correct extents.
// so there is no need to crop after reprojection. Also note that if the SRS's are the
// same (even though extents are different), then this operation is technically not a
// reprojection but merely a resampling.
result = mosaicedImage.reproject(
key.getProfile()->getSRS(),
&key.getExtent(),
*_runtimeOptions.reprojectedTileSize(),
*_runtimeOptions.reprojectedTileSize(),
*_runtimeOptions.driver()->bilinearReprojection() );
}
// Process images with full alpha to properly support MP blending.
if ( result.valid() && *_runtimeOptions.featherPixels() && !isCoverage() )
{
ImageUtils::featherAlphaRegions( result.getImage() );
}
return result;
}
GeoImage
ImageLayer::createImageInKeyProfile(const TileKey& key,
ProgressCallback* progress)
{
if (getStatus().isError())
{
return GeoImage::INVALID;
}
// If the layer is disabled, bail out.
if ( !getEnabled() )
{
return GeoImage::INVALID;
}
// Make sure the request is in range.
if ( !isKeyInRange(key) )
{
return GeoImage::INVALID;
}
GeoImage result;
OE_DEBUG << LC << "create image for \"" << key.str() << "\", ext= "
<< key.getExtent().toString() << std::endl;
// the cache key combines the Key and the horizontal profile.
std::string cacheKey = Stringify() << key.str() << "_" << key.getProfile()->getHorizSignature();
const CachePolicy& policy = getCacheSettings()->cachePolicy().get();
// Check the layer L2 cache first
if ( _memCache.valid() )
{
CacheBin* bin = _memCache->getOrCreateDefaultBin();
ReadResult result = bin->readObject(cacheKey, 0L);
if ( result.succeeded() )
return GeoImage(static_cast<osg::Image*>(result.releaseObject()), key.getExtent());
}
// locate the cache bin for the target profile for this layer:
CacheBin* cacheBin = getCacheBin( key.getProfile() );
// validate that we have either a valid tile source, or we're cache-only.
if (getTileSource() || (cacheBin && policy.isCacheOnly()))
{
//nop = OK.
}
else
{
disable("Error: layer does not have a valid TileSource, cannot create image");
return GeoImage::INVALID;
}
// validate the existance of a valid layer profile (unless we're in cache-only mode, in which
// case there is no layer profile)
if ( !policy.isCacheOnly() && !getProfile() )
{
disable("Could not establish a valid profile");
return GeoImage::INVALID;
}
osg::ref_ptr< osg::Image > cachedImage;
// First, attempt to read from the cache. Since the cached data is stored in the
// map profile, we can try this first.
if ( cacheBin && policy.isCacheReadable() )
{
ReadResult r = cacheBin->readImage(cacheKey, 0L);
if ( r.succeeded() )
{
cachedImage = r.releaseImage();
ImageUtils::fixInternalFormat( cachedImage.get() );
bool expired = policy.isExpired(r.lastModifiedTime());
if (!expired)
{
OE_DEBUG << "Got cached image for " << key.str() << std::endl;
return GeoImage( cachedImage.get(), key.getExtent() );
}
else
{
OE_DEBUG << "Expired image for " << key.str() << std::endl;
}
}
}
// The data was not in the cache. If we are cache-only, fail sliently
if ( policy.isCacheOnly() )
{
// If it's cache only and we have an expired but cached image, just return it.
if (cachedImage.valid())
{
return GeoImage( cachedImage.get(), key.getExtent() );
}
else
{
return GeoImage::INVALID;
}
}
// Get an image from the underlying TileSource.
result = createImageFromTileSource( key, progress );
// Normalize the image if necessary
if ( result.valid() )
{
ImageUtils::fixInternalFormat( result.getImage() );
}
// memory cache first:
if ( result.valid() && _memCache.valid() )
{
CacheBin* bin = _memCache->getOrCreateDefaultBin();
bin->write(cacheKey, result.getImage(), 0L);
}
// If we got a result, the cache is valid and we are caching in the map profile,
// write to the map cache.
if (result.valid() &&
cacheBin &&
policy.isCacheWriteable())
{
if ( key.getExtent() != result.getExtent() )
{
OE_INFO << LC << "WARNING! mismatched extents." << std::endl;
}
cacheBin->write(cacheKey, result.getImage(), 0L);
}
if ( result.valid() )
{
OE_DEBUG << LC << key.str() << " result OK" << std::endl;
}
else
{
OE_DEBUG << LC << key.str() << "result INVALID" << std::endl;
// We couldn't get an image from the source. So see if we have an expired cached image
if (cachedImage.valid())
{
OE_DEBUG << LC << "Using cached but expired image for " << key.str() << std::endl;
result = GeoImage( cachedImage.get(), key.getExtent());
}
}
return result;
}
GeoImage
ImageLayer::createImageInNativeProfile(const TileKey& key,
ProgressCallback* progress)
{
if (getStatus().isError())
{
return GeoImage::INVALID;
}
const Profile* nativeProfile = getProfile();
if ( !nativeProfile )
{
OE_WARN << LC << "Could not establish the profile" << std::endl;
return GeoImage::INVALID;
}
GeoImage result;
if ( key.getProfile()->isHorizEquivalentTo(nativeProfile) )
{
// requested profile matches native profile, move along.
result = createImageInKeyProfile( key, progress );
}
else
{
// find the intersection of keys.
std::vector<TileKey> nativeKeys;
nativeProfile->getIntersectingTiles(key, nativeKeys);
// build a mosaic of the images from the native profile keys:
bool foundAtLeastOneRealTile = false;
ImageMosaic mosaic;
for( std::vector<TileKey>::iterator k = nativeKeys.begin(); k != nativeKeys.end(); ++k )
{
bool isFallback = false;
GeoImage image = createImageInKeyProfile( *k, progress );
if ( image.valid() )
{
mosaic.getImages().push_back( TileImage(image.getImage(), *k) );
}
else
{
// if we get EVEN ONE invalid tile, we have to abort because there will be
// empty spots in the mosaic. (By "invalid" we mean a tile that could not
// even be resolved through the fallback procedure.)
return GeoImage::INVALID;
//TODO: probably need to change this so the mosaic uses alpha.
}
}
// bail out if we got nothing.
if ( mosaic.getImages().size() > 0 )
{
// assemble new GeoImage from the mosaic.
double rxmin, rymin, rxmax, rymax;
mosaic.getExtents( rxmin, rymin, rxmax, rymax );
result = GeoImage(
mosaic.createImage(),
GeoExtent( nativeProfile->getSRS(), rxmin, rymin, rxmax, rymax ) );
}
}
return result;
}
void
FractalElevationLayer::createImplementation(const TileKey& key,
osg::ref_ptr<osg::HeightField>& out_hf,
osg::ref_ptr<NormalMap>& out_normalMap,
ProgressCallback* progress)
{
double min_n = FLT_MAX, max_n = -FLT_MAX;
double min_h = FLT_MAX, max_h = -FLT_MAX;
double h_mean = 0.0;
ImageUtils::PixelReader noise1(_noiseImage1.get());
noise1.setBilinear(true);
ImageUtils::PixelReader noise2(_noiseImage2.get());
noise2.setBilinear(true);
osg::ref_ptr<osg::HeightField> hf = HeightFieldUtils::createReferenceHeightField(
key.getExtent(), getTileSize(), getTileSize(), 0u);
// land cover tile
GeoImage lcTile;
osg::ref_ptr<LandCoverLayer> lcLayer;
_landCover.lock(lcLayer);
if (lcLayer.valid())
{
lcTile = lcLayer->createImage(key, progress);
}
for (int s = 0; s < getTileSize(); ++s)
{
for (int t = 0; t < getTileSize(); ++t)
{
double u = (double)s / (double)(getTileSize() - 1);
double v = (double)t / (double)(getTileSize() - 1);
double n = 0.0;
double uScaled, vScaled;
double finalScale = 4.0;
// Step 1
if (_noiseImage1.valid())
{
uScaled = u, vScaled = v;
scaleCoordsToLOD(uScaled, vScaled, options().baseLOD().get(), key);
double uMod = fmod(uScaled, 1.0);
double vMod = fmod(vScaled, 1.0);
n += noise1(uMod, vMod).r() - 0.5;
finalScale *= 0.5;
}
if (_noiseImage2.valid())
{
uScaled = u, vScaled = v;
scaleCoordsToLOD(uScaled, vScaled, options().baseLOD().get() + 3, key);
double uMod = fmod(uScaled, 1.0);
double vMod = fmod(vScaled, 1.0);
n += noise2(uMod, vMod).r() - 0.5;
finalScale *= 0.5;
}
n *= finalScale;
// default amplitude:
float amp = options().amplitude().get();
// if we have land cover mappings, use them:
if (lcTile.valid())
{
const LandCoverClass* lcClass = lcLayer->getClassByUV(lcTile, u, v);
if (lcClass)
{
const FractalElevationLayerLandCoverMapping* mapping = getMapping(lcClass);
if (mapping)
{
amp = mapping->amplitude.getOrUse(amp);
}
}
}
hf->setHeight(s, t, n * amp);
if (_debug)
{
h_mean += hf->getHeight(s, t);
min_n = std::min(min_n, n);
max_n = std::max(max_n, n);
min_h = std::min(min_h, (double)hf->getHeight(s, t));
max_h = std::max(max_h, (double)hf->getHeight(s, t));
}
}
}
if (_debug)
{
h_mean /= double(getTileSize()*getTileSize());
double q_mean = 0.0;
for (int s = 0; s < getTileSize(); ++s)
{
for (int t = 0; t < getTileSize(); ++t)
{
double q = hf->getHeight(s, t) - h_mean;
q_mean += q*q;
}
}
double stdev = sqrt(q_mean / double(getTileSize()*getTileSize()));
OE_INFO << LC << "Tile " << key.str() << " Hmean=" << h_mean
<< ", stdev=" << stdev << ", n[" << min_n << ", " << max_n << "] "
<< "h[" << min_h << ", " << max_h << "]\n";
}
out_hf = hf.release();
out_normalMap = 0L;
}
osg::Image*
CompositeTileSource::createImage(const TileKey& key,
ProgressCallback* progress )
{
ImageMixVector images;
images.reserve(_imageLayers.size());
// Try to get an image from each of the layers for the given key.
for (ImageLayerVector::const_iterator itr = _imageLayers.begin(); itr != _imageLayers.end(); ++itr)
{
ImageLayer* layer = itr->get();
ImageInfo imageInfo;
imageInfo.dataInExtents = layer->getTileSource()->hasDataInExtent( key.getExtent() );
imageInfo.opacity = layer->getOpacity();
if (imageInfo.dataInExtents)
{
GeoImage image = layer->createImage(key, progress);
if (image.valid())
{
imageInfo.image = image.getImage();
}
// If the progress got cancelled or it needs a retry then return NULL to prevent this tile from being built and cached with incomplete or partial data.
if (progress && (progress->isCanceled() || progress->needsRetry()))
{
OE_DEBUG << LC << " createImage was cancelled or needs retry for " << key.str() << std::endl;
return 0L;
}
}
images.push_back(imageInfo);
}
// Determine the output texture size to use based on the image that were creatd.
unsigned numValidImages = 0;
osg::Vec2s textureSize;
for (unsigned int i = 0; i < images.size(); i++)
{
ImageInfo& info = images[i];
if (info.image.valid())
{
if (numValidImages == 0)
{
textureSize.set( info.image->s(), info.image->t());
}
numValidImages++;
}
}
// Create fallback images if we have some valid data but not for all the layers
if (numValidImages > 0 && numValidImages < images.size())
{
for (unsigned int i = 0; i < images.size(); i++)
{
ImageInfo& info = images[i];
ImageLayer* layer = _imageLayers[i].get();
if (!info.image.valid() && info.dataInExtents)
{
TileKey parentKey = key.createParentKey();
GeoImage image;
while (!image.valid() && parentKey.valid())
{
image = layer->createImage(parentKey, progress);
if (image.valid())
{
break;
}
// If the progress got cancelled or it needs a retry then return NULL to prevent this tile from being built and cached with incomplete or partial data.
if (progress && (progress->isCanceled() || progress->needsRetry()))
{
OE_DEBUG << LC << " createImage was cancelled or needs retry for " << key.str() << std::endl;
return 0L;
}
parentKey = parentKey.createParentKey();
}
if (image.valid())
{
// TODO: Bilinear options?
bool bilinear = layer->isCoverage() ? false : true;
GeoImage cropped = image.crop( key.getExtent(), true, textureSize.x(), textureSize.y(), bilinear);
info.image = cropped.getImage();
}
}
}
}
// Now finally create the output image.
//Recompute the number of valid images
numValidImages = 0;
for (unsigned int i = 0; i < images.size(); i++)
{
ImageInfo& info = images[i];
if (info.image.valid()) numValidImages++;
}
if ( progress && progress->isCanceled() )
{
return 0L;
}
else if ( numValidImages == 0 )
{
return 0L;
}
else if ( numValidImages == 1 )
{
//We only have one valid image, so just return it and don't bother with compositing
for (unsigned int i = 0; i < images.size(); i++)
{
ImageInfo& info = images[i];
if (info.image.valid())
return info.image.release();
}
return 0L;
}
else
{
osg::Image* result = 0;
for (unsigned int i = 0; i < images.size(); i++)
{
ImageInfo& imageInfo = images[i];
if (!result)
{
if (imageInfo.image.valid())
{
result = new osg::Image( *imageInfo.image.get());
}
}
else
{
if (imageInfo.image.valid())
{
ImageUtils::mix( result, imageInfo.image.get(), imageInfo.opacity );
}
}
}
return result;
}
}
GeoImage
ImageLayer::createImageInNativeProfile( const TileKey& key, ProgressCallback* progress, bool forceFallback, bool& out_isFallback)
{
out_isFallback = false;
const Profile* nativeProfile = getProfile();
if ( !nativeProfile )
{
OE_WARN << LC << "Could not establish the profile" << std::endl;
return GeoImage::INVALID;
}
if ( key.getProfile()->isEquivalentTo(nativeProfile) )
{
// requested profile matches native profile, move along.
return createImageInKeyProfile( key, progress, forceFallback, out_isFallback );
}
else
{
// find the intersection of keys.
std::vector<TileKey> nativeKeys;
nativeProfile->getIntersectingTiles(key.getExtent(), nativeKeys);
//OE_INFO << "KEY = " << key.str() << ":" << std::endl;
//for(int i=0; i<nativeKeys.size(); ++i)
// OE_INFO << " " << nativeKeys[i].str() << std::endl;
// build a mosaic of the images from the native profile keys:
bool foundAtLeastOneRealTile = false;
ImageMosaic mosaic;
for( std::vector<TileKey>::iterator k = nativeKeys.begin(); k != nativeKeys.end(); ++k )
{
bool isFallback = false;
GeoImage image = createImageInKeyProfile( *k, progress, true, isFallback );
if ( image.valid() )
{
mosaic.getImages().push_back( TileImage(image.getImage(), *k) );
if ( !isFallback )
foundAtLeastOneRealTile = true;
}
else
{
// if we get EVEN ONE invalid tile, we have to abort because there will be
// empty spots in the mosaic. (By "invalid" we mean a tile that could not
// even be resolved through the fallback procedure.)
return GeoImage::INVALID;
}
}
// bail out if we got nothing.
if ( mosaic.getImages().size() == 0 )
return GeoImage::INVALID;
// if the mosaic is ALL fallback data, this tile is fallback data.
if ( foundAtLeastOneRealTile )
{
// assemble new GeoImage from the mosaic.
double rxmin, rymin, rxmax, rymax;
mosaic.getExtents( rxmin, rymin, rxmax, rymax );
GeoImage result(
mosaic.createImage(),
GeoExtent( nativeProfile->getSRS(), rxmin, rymin, rxmax, rymax ) );
#if 1
return result;
#else // let's try this. why crop? Just leave it. Faster and more compatible with NPOT
// systems (like iOS)
// calculate a tigher extent that matches the original input key:
GeoExtent tightExtent = nativeProfile->clampAndTransformExtent( key.getExtent() );
// a non-exact crop is critical here to avoid resampling the data
return result.crop( tightExtent, false, 0, 0, *_runtimeOptions.driver()->bilinearReprojection() );
#endif
}
else // all fallback data
{
GeoImage result;
if ( forceFallback && key.getLevelOfDetail() > 0 )
{
result = createImageInNativeProfile(
key.createParentKey(),
progress,
forceFallback,
out_isFallback );
}
out_isFallback = true;
return result;
}
//if ( !foundAtLeastOneRealTile )
// out_isFallback = true;
}
}
GeoImage
ImageLayer::assembleImageFromTileSource(const TileKey& key,
ProgressCallback* progress,
bool& out_isFallback)
{
GeoImage mosaicedImage, result;
out_isFallback = false;
// Scale the extent if necessary to apply an "edge buffer"
GeoExtent ext = key.getExtent();
if ( _runtimeOptions.edgeBufferRatio().isSet() )
{
double ratio = _runtimeOptions.edgeBufferRatio().get();
ext.scale(ratio, ratio);
}
// Get a set of layer tiles that intersect the requested extent.
std::vector<TileKey> intersectingKeys;
getProfile()->getIntersectingTiles( ext, intersectingKeys );
if ( intersectingKeys.size() > 0 )
{
double dst_minx, dst_miny, dst_maxx, dst_maxy;
key.getExtent().getBounds(dst_minx, dst_miny, dst_maxx, dst_maxy);
// if we find at least one "real" tile in the mosaic, then the whole result tile is
// "real" (i.e. not a fallback tile)
bool foundAtLeastOneRealTile = false;
bool retry = false;
ImageMosaic mosaic;
for( std::vector<TileKey>::iterator k = intersectingKeys.begin(); k != intersectingKeys.end(); ++k )
{
double minX, minY, maxX, maxY;
k->getExtent().getBounds(minX, minY, maxX, maxY);
bool isFallback = false;
GeoImage image = createImageFromTileSource( *k, progress, true, isFallback );
if ( image.valid() )
{
// make sure the image is RGBA.
// (TODO: investigate whether we still need this -gw 6/25/2012)
if (image.getImage()->getPixelFormat() != GL_RGBA || image.getImage()->getDataType() != GL_UNSIGNED_BYTE || image.getImage()->getInternalTextureFormat() != GL_RGBA8 )
{
osg::ref_ptr<osg::Image> convertedImg = ImageUtils::convertToRGBA8(image.getImage());
if (convertedImg.valid())
{
image = GeoImage(convertedImg, image.getExtent());
}
}
mosaic.getImages().push_back( TileImage(image.getImage(), *k) );
if ( !isFallback )
foundAtLeastOneRealTile = true;
}
else
{
// the tile source did not return a tile, so make a note of it.
if (progress && (progress->isCanceled() || progress->needsRetry()))
{
retry = true;
break;
}
}
}
if ( mosaic.getImages().empty() || retry )
{
// if we didn't get any data, fail
OE_DEBUG << LC << "Couldn't create image for ImageMosaic " << std::endl;
return GeoImage::INVALID;
}
// all set. Mosaic all the images together.
double rxmin, rymin, rxmax, rymax;
mosaic.getExtents( rxmin, rymin, rxmax, rymax );
mosaicedImage = GeoImage(
mosaic.createImage(),
GeoExtent( getProfile()->getSRS(), rxmin, rymin, rxmax, rymax ) );
if ( !foundAtLeastOneRealTile )
out_isFallback = true;
}
else
{
OE_DEBUG << LC << "assembleImageFromTileSource: no intersections (" << key.str() << ")" << std::endl;
}
// Final step: transform the mosaic into the requesting key's extent.
if ( mosaicedImage.valid() )
{
// GeoImage::reproject() will automatically crop the image to the correct extents.
// so there is no need to crop after reprojection. Also note that if the SRS's are the
// same (even though extents are different), then this operation is technically not a
// reprojection but merely a resampling.
result = mosaicedImage.reproject(
key.getProfile()->getSRS(),
&key.getExtent(),
*_runtimeOptions.reprojectedTileSize(),
*_runtimeOptions.reprojectedTileSize(),
*_runtimeOptions.driver()->bilinearReprojection());
}
// Process images with full alpha to properly support MP blending.
if ( result.valid() && *_runtimeOptions.featherPixels() )
{
ImageUtils::featherAlphaRegions( result.getImage() );
}
return result;
}
GeoImage
ImageLayer::createImageInNativeProfile(const TileKey& key,
ProgressCallback* progress)
{
if (getStatus().isError())
{
return GeoImage::INVALID;
}
const Profile* nativeProfile = getProfile();
if ( !nativeProfile )
{
OE_WARN << LC << "Could not establish the profile" << std::endl;
return GeoImage::INVALID;
}
GeoImage result;
if ( key.getProfile()->isHorizEquivalentTo(nativeProfile) )
{
// requested profile matches native profile, move along.
result = createImageInKeyProfile( key, progress );
}
else
{
// find the intersection of keys.
std::vector<TileKey> nativeKeys;
nativeProfile->getIntersectingTiles(key, nativeKeys);
// build a mosaic of the images from the native profile keys:
bool foundAtLeastOneRealTile = false;
ImageMosaic mosaic;
for( std::vector<TileKey>::iterator k = nativeKeys.begin(); k != nativeKeys.end(); ++k )
{
GeoImage image = createImageInKeyProfile( *k, progress );
if ( image.valid() )
{
foundAtLeastOneRealTile = true;
mosaic.getImages().push_back( TileImage(image.getImage(), *k) );
}
else
{
// We didn't get an image so pad the mosaic with a transparent image.
mosaic.getImages().push_back( TileImage(ImageUtils::createEmptyImage(getTileSize(), getTileSize()), *k));
}
}
// bail out if we got nothing.
if ( foundAtLeastOneRealTile )
{
// assemble new GeoImage from the mosaic.
double rxmin, rymin, rxmax, rymax;
mosaic.getExtents( rxmin, rymin, rxmax, rymax );
result = GeoImage(
mosaic.createImage(),
GeoExtent( nativeProfile->getSRS(), rxmin, rymin, rxmax, rymax ) );
}
}
return result;
}
