void
createLayerItem( Grid* grid, int gridRow, int layerIndex, int numLayers, TerrainLayer* layer, bool isActive )
{
// a checkbox to enable/disable the layer:
CheckBoxControl* enabled = new CheckBoxControl( layer->getVisible() );
enabled->addEventHandler( new LayerVisibleHandler(layer) );
grid->setControl( 0, gridRow, enabled );
// the layer name
LabelControl* name = new LabelControl( layer->getName() );
grid->setControl( 1, gridRow, name );
ImageLayer* imageLayer = dynamic_cast< ImageLayer* > (layer );
if (imageLayer)
{
// an opacity slider
HSliderControl* opacity = new HSliderControl( 0.0f, 1.0f, imageLayer->getOpacity() );
opacity->setWidth( 125 );
opacity->setHeight( 12 );
opacity->addEventHandler( new LayerOpacityHandler(imageLayer) );
grid->setControl( 2, gridRow, opacity );
}
// move buttons
if ( layerIndex < numLayers-1 && isActive )
{
LabelControl* upButton = new LabelControl( "UP", 14 );
upButton->setBackColor( .4,.4,.4,1 );
upButton->setActiveColor( .8,0,0,1 );
upButton->addEventHandler( new MoveLayerHandler( layer, layerIndex+1 ) );
grid->setControl( 3, gridRow, upButton );
}
if ( layerIndex > 0 && isActive)
{
LabelControl* upButton = new LabelControl( "DOWN", 14 );
upButton->setBackColor( .4,.4,.4,1 );
upButton->setActiveColor( .8,0,0,1 );
upButton->addEventHandler( new MoveLayerHandler( layer, layerIndex-1 ) );
grid->setControl( 4, gridRow, upButton );
}
// add/remove button:
LabelControl* addRemove = new LabelControl( isActive? "REMOVE" : "ADD", 14 );
addRemove->setHorizAlign( Control::ALIGN_CENTER );
addRemove->setBackColor( .4,.4,.4,1 );
addRemove->setActiveColor( .8,0,0,1 );
if ( isActive )
addRemove->addEventHandler( new RemoveLayerHandler(layer) );
else
addRemove->addEventHandler( new AddLayerHandler(layer) );
grid->setControl( 5, gridRow, addRemove );
}
void
TerrainEngineNode::updateImageUniforms()
{
// don't bother if this is a hurting old card
if ( !Registry::instance()->getCapabilities().supportsGLSL() )
return;
// update the layer uniform arrays:
osg::StateSet* stateSet = this->getOrCreateStateSet();
// get a copy of the image layer stack:
MapFrame mapf( _map.get(), Map::IMAGE_LAYERS );
_imageLayerController->_layerVisibleUniform.detach();
_imageLayerController->_layerOpacityUniform.detach();
_imageLayerController->_layerRangeUniform.detach();
if ( mapf.imageLayers().size() > 0 )
{
// the "enabled" uniform is fixed size. this is handy to account for layers that are in flux...i.e., their source
// layer count has changed, but the shader has not yet caught up. In the future we might use this to disable
// "ghost" layers that used to exist at a given index, but no longer do.
_imageLayerController->_layerVisibleUniform.attach( "osgearth_ImageLayerVisible", osg::Uniform::BOOL, stateSet, mapf.imageLayers().size() );
_imageLayerController->_layerOpacityUniform.attach( "osgearth_ImageLayerOpacity", osg::Uniform::FLOAT, stateSet, mapf.imageLayers().size() );
_imageLayerController->_layerRangeUniform.attach ( "osgearth_ImageLayerRange", osg::Uniform::FLOAT, stateSet, 2 * mapf.imageLayers().size() );
for( ImageLayerVector::const_iterator i = mapf.imageLayers().begin(); i != mapf.imageLayers().end(); ++i )
{
ImageLayer* layer = i->get();
int index = (int)(i - mapf.imageLayers().begin());
_imageLayerController->_layerVisibleUniform.setElement( index, layer->getVisible() );
_imageLayerController->_layerOpacityUniform.setElement( index, layer->getOpacity() );
_imageLayerController->_layerRangeUniform.setElement( (2*index), layer->getMinVisibleRange() );
_imageLayerController->_layerRangeUniform.setElement( (2*index)+1, layer->getMaxVisibleRange() );
}
// set the remainder of the layers to disabled
for( int j=mapf.imageLayers().size(); j<_imageLayerController->_layerVisibleUniform.getNumElements(); ++j)
{
_imageLayerController->_layerVisibleUniform.setElement( j, false );
}
}
dirty();
}
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;
}
}