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Java Source Code / Java Documentation » GIS » GeoServer » org.vfny.geoserver.wms.responses

Source Cross Reference

Class Diagram

Java Document (Java Doc)

org.vfny.geoserver.wms.responses .PaletteExtractor

PaletteExtractor
public class PaletteExtractor extends FilterAttributeExtractor implements StyleVisitor(Code)
	A style visitor whose purpose is to extract a minimal palette for the provided style. This is to be used when no antialiasing is used, since that would introduce various colors not included in the style. At the moment the palette is extracted only if external graphics aren't referenced (a future version may learn to extract a palette merging the ones of the external graphics).

Field Summary
final public static Color	TRANSPARENT
Set	colors
boolean	externalGraphicsSymbolizers
boolean	rasterUsed
boolean	translucentSymbolizers
boolean	unknownColors

Constructor Summary
public	PaletteExtractor(Color background)

Method Summary
public boolean	canComputePalette()
public IndexColorModel	getPalette()
void	handleColor(Expression color)
void	handleOpacity(Expression opacity) Checks whether translucency is used in the provided expression.
public void	visit(Style style)
public void	visit(Rule rule)
public void	visit(FeatureTypeStyle fts)
public void	visit(StyledLayerDescriptor sld)
public void	visit(NamedLayer layer)
public void	visit(UserLayer layer)
public void	visit(FeatureTypeConstraint ftc)
public void	visit(Symbolizer sym)
public void	visit(Fill fill)
public void	visit(Stroke stroke)
public void	visit(RasterSymbolizer rs)
public void	visit(PointSymbolizer ps)
public void	visit(LineSymbolizer line)
public void	visit(PolygonSymbolizer poly)
public void	visit(TextSymbolizer text)
public void	visit(Graphic gr)
public void	visit(Mark mark)
public void	visit(ExternalGraphic exgr)
public void	visit(PointPlacement pp)
public void	visit(AnchorPoint ap)
public void	visit(Displacement dis)
public void	visit(LinePlacement lp)
public void	visit(Halo halo)
public void	visit(ColorMap map)
public void	visit(ColorMapEntry entry)

Field Detail

TRANSPARENT
final public static Color TRANSPARENT(Code)

colors
Set colors(Code)

externalGraphicsSymbolizers
boolean externalGraphicsSymbolizers(Code)

rasterUsed
boolean rasterUsed(Code)

translucentSymbolizers
boolean translucentSymbolizers(Code)

unknownColors
boolean unknownColors(Code)

Constructor Detail

PaletteExtractor
public PaletteExtractor(Color background)(Code)
	Initializes a new palette extractor Parameters: background - background color, or null if transparent

Method Detail

canComputePalette
public boolean canComputePalette()(Code)

getPalette
public IndexColorModel getPalette()(Code)
	Returns the palette, or null if it wasn't possible to devise one

handleColor
void handleColor(Expression color)(Code)
	Adds a color to the color set, and raises the unknown color flag if the color is an expression other than a literal Parameters: color -

handleOpacity
void handleOpacity(Expression opacity)(Code)
	Checks whether translucency is used in the provided expression. Raises the flag of used translucency unless it's possible to determine it's not. Parameters: opacity -

visit
public void visit(Style style)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Style)

visit
public void visit(Rule rule)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Rule)

visit
public void visit(FeatureTypeStyle fts)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.FeatureTypeStyle)

visit
public void visit(StyledLayerDescriptor sld)(Code)

visit
public void visit(NamedLayer layer)(Code)

visit
public void visit(UserLayer layer)(Code)

visit
public void visit(FeatureTypeConstraint ftc)(Code)

visit
public void visit(Symbolizer sym)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Symbolizer)

visit
public void visit(Fill fill)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Fill)

visit
public void visit(Stroke stroke)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Stroke)

visit
public void visit(RasterSymbolizer rs)(Code)

visit
public void visit(PointSymbolizer ps)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.PointSymbolizer)

visit
public void visit(LineSymbolizer line)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.LineSymbolizer)

visit
public void visit(PolygonSymbolizer poly)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.PolygonSymbolizer)

visit
public void visit(TextSymbolizer text)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.TextSymbolizer)

visit
public void visit(Graphic gr)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Graphic)

visit
public void visit(Mark mark)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Mark)

visit
public void visit(ExternalGraphic exgr)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.ExternalGraphic)

visit
public void visit(PointPlacement pp)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.PointPlacement)

visit
public void visit(AnchorPoint ap)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.AnchorPoint)

visit
public void visit(Displacement dis)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Displacement)

visit
public void visit(LinePlacement lp)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.LinePlacement)

visit
public void visit(Halo halo)(Code)
	See Also: org.geotools.styling.StyleVisitor.visit(org.geotools.styling.Halo)

visit
public void visit(ColorMap map)(Code)

visit
public void visit(ColorMapEntry entry)(Code)

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