bool CacheTileHandler::hasData( const TileKey& key ) const
{
TileSource* ts = _layer->getTileSource();
if (ts)
{
return ts->hasData(key);
}
return true;
}
GeoImage
ImageLayer::createImageFromTileSource(const TileKey& key,
ProgressCallback* progress)
{
TileSource* source = getTileSource();
if ( !source )
return GeoImage::INVALID;
// If the profiles are different, use a compositing method to assemble the tile.
if ( !key.getProfile()->isHorizEquivalentTo( getProfile() ) )
{
return assembleImageFromTileSource( key, progress );
}
// Good to go, ask the tile source for an image:
osg::ref_ptr<TileSource::ImageOperation> op = getOrCreatePreCacheOp();
// Fail is the image is blacklisted.
if ( source->getBlacklist()->contains(key) )
{
OE_DEBUG << LC << "createImageFromTileSource: blacklisted(" << key.str() << ")" << std::endl;
return GeoImage::INVALID;
}
if ( !source->hasData( key ) )
{
OE_DEBUG << LC << "createImageFromTileSource: hasData(" << key.str() << ") == false" << std::endl;
return GeoImage::INVALID;
}
// create an image from the tile source.
osg::ref_ptr<osg::Image> result = source->createImage( key, op.get(), progress );
// Process images with full alpha to properly support MP blending.
if ( result.valid() && *_runtimeOptions.featherPixels())
{
ImageUtils::featherAlphaRegions( result.get() );
}
// If image creation failed (but was not intentionally canceled and
// didn't time out or end for any other recoverable reason), then
// blacklist this tile for future requests.
if (result == 0L)
{
if ( progress == 0L ||
( !progress->isCanceled() && !progress->needsRetry() ) )
{
source->getBlacklist()->add( key );
}
}
return GeoImage(result.get(), key.getExtent());
}
osg::Image*
CompositeTileSource::createImage( const TileKey& key, ProgressCallback* progress )
{
ImageMixVector images;
images.reserve( _options._components.size() );
for(CompositeTileSourceOptions::ComponentVector::const_iterator i = _options._components.begin();
i != _options._components.end();
++i )
{
if ( progress && progress->isCanceled() )
return 0L;
// check that this source is within the level bounds:
if (i->_imageLayerOptions->minLevel().value() > key.getLevelOfDetail() ||
i->_imageLayerOptions->maxLevel().value() < key.getLevelOfDetail() )
{
continue;
}
TileSource* source = i->_tileSourceInstance->get();
if ( source )
{
if ( !source->getBlacklist()->contains( key.getTileId() ) )
{
//Only try to get data if the source actually has data
if ( source->hasData( key ) )
{
ImageOpacityPair imagePair(
source->createImage( key, _preCacheOp.get(), progress ),
1.0f );
//If the image is not valid and the progress was not cancelled, blacklist
if (!imagePair.first.valid() && (!progress || !progress->isCanceled()))
{
//Add the tile to the blacklist
OE_DEBUG << LC << "Adding tile " << key.str() << " to the blacklist" << std::endl;
source->getBlacklist()->add( key.getTileId() );
}
if ( imagePair.first.valid() )
{
// check for opacity:
imagePair.second = i->_imageLayerOptions.isSet() ? i->_imageLayerOptions->opacity().value() : 1.0f;
images.push_back( imagePair );
}
}
else
{
OE_DEBUG << LC << "Source has no data at " << key.str() << std::endl;
}
}
else
{
OE_DEBUG << LC << "Tile " << key.str() << " is blacklisted, not checking" << std::endl;
}
}
}
if ( progress && progress->isCanceled() )
{
return 0L;
}
else if ( images.size() == 0 )
{
return 0L;
}
else if ( images.size() == 1 )
{
return images[0].first.release();
}
else
{
osg::Image* result = new osg::Image( *images[0].first.get() );
for( unsigned int i=1; i<images.size(); ++i )
{
ImageOpacityPair& pair = images[i];
if ( pair.first.valid() )
{
ImageUtils::mix( result, pair.first.get(), pair.second );
}
}
return result;
}
}
GeoImage
ImageLayer::createImageFromTileSource(const TileKey& key,
ProgressCallback* progress,
bool forceFallback,
bool& out_isFallback)
{
// Results:
//
// * return an osg::Image matching the key extent is all goes well;
//
// * return NULL to indicate that the key exceeds the maximum LOD of the source data,
// and that the engine may need to generate a "fallback" tile if necessary;
//
// deprecated:
// * return an "empty image" if the LOD is valid BUT the key does not intersect the
// source's data extents.
out_isFallback = false;
TileSource* source = getTileSource();
if ( !source )
return GeoImage::INVALID;
// If the profiles are different, use a compositing method to assemble the tile.
if ( !key.getProfile()->isEquivalentTo( getProfile() ) )
{
return assembleImageFromTileSource( key, progress, out_isFallback );
}
// Good to go, ask the tile source for an image:
osg::ref_ptr<TileSource::ImageOperation> op = _preCacheOp;
osg::ref_ptr<osg::Image> result;
if ( forceFallback )
{
// check if the tile source has any data coverage for the requested key.
// the LOD is ignore here and checked later
if ( !source->hasDataInExtent( key.getExtent() ) )
{
OE_DEBUG << LC << "createImageFromTileSource: hasDataInExtent(" << key.str() << ") == false" << std::endl;
return GeoImage::INVALID;
}
TileKey finalKey = key;
while( !result.valid() && finalKey.valid() )
{
if ( !source->getBlacklist()->contains( finalKey.getTileId() ) &&
source->hasDataForFallback(finalKey))
{
result = source->createImage( finalKey, op.get(), progress );
if ( result.valid() )
{
if ( finalKey.getLevelOfDetail() != key.getLevelOfDetail() )
{
// crop the fallback image to match the input key, and ensure that it remains the
// same pixel size; because chances are if we're requesting a fallback that we're
// planning to mosaic it later, and the mosaicer requires same-size images.
GeoImage raw( result.get(), finalKey.getExtent() );
GeoImage cropped = raw.crop( key.getExtent(), true, raw.getImage()->s(), raw.getImage()->t(), *_runtimeOptions.driver()->bilinearReprojection() );
result = cropped.takeImage();
}
}
}
if ( !result.valid() )
{
finalKey = finalKey.createParentKey();
out_isFallback = true;
}
}
if ( !result.valid() )
{
result = 0L;
//result = _emptyImage.get();
finalKey = key;
}
}
else
{
// Fail is the image is blacklisted.
if ( source->getBlacklist()->contains( key.getTileId() ) )
{
OE_DEBUG << LC << "createImageFromTileSource: blacklisted(" << key.str() << ")" << std::endl;
return GeoImage::INVALID;
}
if ( !source->hasData( key ) )
{
OE_DEBUG << LC << "createImageFromTileSource: hasData(" << key.str() << ") == false" << std::endl;
return GeoImage::INVALID;
}
result = source->createImage( key, op.get(), progress );
}
// Process images with full alpha to properly support MP blending.
if ( result != 0L && *_runtimeOptions.featherPixels())
{
ImageUtils::featherAlphaRegions( result.get() );
}
// If image creation failed (but was not intentionally canceled),
// blacklist this tile for future requests.
if ( result == 0L && (!progress || !progress->isCanceled()) )
{
source->getBlacklist()->add( key.getTileId() );
}
return GeoImage(result.get(), key.getExtent());
}
osg::Image*
CompositeTileSource::createImage( const TileKey& key, ProgressCallback* progress )
{
ImageMixVector images;
images.reserve( _options._components.size() );
for(CompositeTileSourceOptions::ComponentVector::const_iterator i = _options._components.begin();
i != _options._components.end();
++i )
{
if ( progress && progress->isCanceled() )
return 0L;
TileSource* source = i->_tileSourceInstance->get();
if ( source )
{
//TODO: This duplicates code in ImageLayer::isKeyValid. Maybe should move that to TileSource::isKeyValid instead
int minLevel = 0;
int maxLevel = INT_MAX;
if (i->_imageLayerOptions->minLevel().isSet())
{
minLevel = i->_imageLayerOptions->minLevel().value();
}
else if (i->_imageLayerOptions->minLevelResolution().isSet())
{
minLevel = source->getProfile()->getLevelOfDetailForHorizResolution( i->_imageLayerOptions->minLevelResolution().value(), source->getPixelsPerTile());
}
if (i->_imageLayerOptions->maxLevel().isSet())
{
maxLevel = i->_imageLayerOptions->maxLevel().value();
}
else if (i->_imageLayerOptions->maxLevelResolution().isSet())
{
maxLevel = source->getProfile()->getLevelOfDetailForHorizResolution( i->_imageLayerOptions->maxLevelResolution().value(), source->getPixelsPerTile());
}
// check that this source is within the level bounds:
if (minLevel > key.getLevelOfDetail() ||
maxLevel < key.getLevelOfDetail() )
{
continue;
}
if ( !source->getBlacklist()->contains( key.getTileId() ) )
{
//Only try to get data if the source actually has data
if ( source->hasData( key ) )
{
osg::ref_ptr< ImageLayerPreCacheOperation > preCacheOp;
if ( i->_imageLayerOptions.isSet() )
{
preCacheOp = new ImageLayerPreCacheOperation();
preCacheOp->_processor.init( i->_imageLayerOptions.value(), true );
}
ImageOpacityPair imagePair(
source->createImage( key, preCacheOp.get(), progress ),
1.0f );
//If the image is not valid and the progress was not cancelled, blacklist
if (!imagePair.first.valid() && (!progress || !progress->isCanceled()))
{
//Add the tile to the blacklist
OE_DEBUG << LC << "Adding tile " << key.str() << " to the blacklist" << std::endl;
source->getBlacklist()->add( key.getTileId() );
}
if ( imagePair.first.valid() )
{
// check for opacity:
imagePair.second = i->_imageLayerOptions.isSet() ? i->_imageLayerOptions->opacity().value() : 1.0f;
images.push_back( imagePair );
}
}
else
{
OE_DEBUG << LC << "Source has no data at " << key.str() << std::endl;
}
}
else
{
OE_DEBUG << LC << "Tile " << key.str() << " is blacklisted, not checking" << std::endl;
}
}
}
if ( progress && progress->isCanceled() )
{
return 0L;
}
else if ( images.size() == 0 )
{
return 0L;
}
else if ( images.size() == 1 )
{
return images[0].first.release();
}
else
{
osg::Image* result = new osg::Image( *images[0].first.get() );
for( unsigned int i=1; i<images.size(); ++i )
{
ImageOpacityPair& pair = images[i];
if ( pair.first.valid() )
{
ImageUtils::mix( result, pair.first.get(), pair.second );
}
}
return result;
}
}
osg::HeightField*
ElevationLayer::createHeightFieldFromTileSource(const TileKey& key,
ProgressCallback* progress)
{
osg::HeightField* result = 0L;
TileSource* source = getTileSource();
if ( !source )
return 0L;
// If the key is blacklisted, fail.
if ( source->getBlacklist()->contains( key.getTileId() ) )
{
OE_DEBUG << LC << "Tile " << key.str() << " is blacklisted " << std::endl;
return 0L;
}
// If the profiles are horizontally equivalent (different vdatums is OK), take the
// quick route:
if ( key.getProfile()->isHorizEquivalentTo( getProfile() ) )
{
// Only try to get data if the source actually has data
if ( !source->hasData(key) )
{
OE_DEBUG << LC << "Source for layer has no data at " << key.str() << std::endl;
return 0L;
}
// Make it from the source:
result = source->createHeightField( key, _preCacheOp.get(), progress );
// If the result is good, we how have a heightfield but it's vertical values
// are still relative to the tile source's vertical datum. Convert them.
if ( result )
{
if ( ! key.getExtent().getSRS()->isVertEquivalentTo( getProfile()->getSRS() ) )
{
VerticalDatum::transform(
getProfile()->getSRS()->getVerticalDatum(), // from
key.getExtent().getSRS()->getVerticalDatum(), // to
key.getExtent(),
result );
}
}
// Blacklist the tile if it is the same projection as the source and we can't get it and it wasn't cancelled
if ( !result && (!progress || !progress->isCanceled()))
{
source->getBlacklist()->add( key.getTileId() );
}
}
// Otherwise, profiles don't match so we need to composite:
else
{
// note: this method takes care of the vertical datum shift internally.
result = assembleHeightFieldFromTileSource( key, progress );
}
#if 0
// If the profiles don't match, use a more complicated technique to assemble the tile:
if ( !key.getProfile()->isEquivalentTo( getProfile() ) )
{
result = assembleHeightFieldFromTileSource( key, progress );
}
else
{
// Only try to get data if the source actually has data
if ( !source->hasData( key ) )
{
OE_DEBUG << LC << "Source for layer has no data at " << key.str() << std::endl;
return 0L;
}
// Make it from the source:
result = source->createHeightField( key, _preCacheOp.get(), progress );
}
#endif
return result;
}
