org.jfree.graphics2d.svg.SVGGraphics2D Maven / Gradle / Ivy
/* ===================================================
* JFreeSVG : an SVG library for the Java(tm) platform
* ===================================================
*
* (C)opyright 2013-2015, by Object Refinery Limited. All rights reserved.
*
* Project Info: http://www.jfree.org/jfreesvg/index.html
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
* Usage
* Using the {@code SVGGraphics2D} class is straightforward. First,
* create an instance specifying the height and width of the SVG element that
* will be created. Then, use standard Java2D API calls to draw content
* into the element. Finally, retrieve the SVG element that has been
* accumulated. For example:
*
* {@code SVGGraphics2D g2 = new SVGGraphics2D(300, 200);
}
* {@code g2.setPaint(Color.RED);
}
* {@code g2.draw(new Rectangle(10, 10, 280, 180);
}
* {@code String svgElement = g2.getSVGElement();
}
*
* For the content generation step, you can make use of third party libraries,
* such as JFreeChart and
* Orson Charts, that
* render output using standard Java2D API calls.
*
* Rendering Hints
* The {@code SVGGraphics2D} supports a couple of custom rendering hints -
* for details, refer to the {@link SVGHints} class documentation. Also see
* the examples in this blog post:
*
* Orson Charts 3D / Enhanced SVG Export.
*
* Other Notes
* Some additional notes:
*
* - Images are supported, but for methods with an {@code ImageObserver}
* parameter note that the observer is ignored completely. In any case, using
* images that are not fully loaded already would not be a good idea in the
* context of generating SVG data/files;
*
* - the {@link #getFontMetrics(java.awt.Font)} and
* {@link #getFontRenderContext()} methods return values that come from an
* internal {@code BufferedImage}, this is a short-cut and we don't know
* if there are any negative consequences (if you know of any, please let us
* know and we'll add the info here or find a way to fix it);
*
* - there are settings to control the number of decimal places used to
* write the coordinates for geometrical elements (default 2dp) and transform
* matrices (default 6dp). These defaults may change in a future release.
*
* - when an HTML page contains multiple SVG elements, the items within
* the DEFS element for each SVG element must have IDs that are unique across
* all SVG elements in the page. We auto-populate the
* {@code defsKeyPrefix} attribute to help ensure that unique IDs are
* generated.
*
*
* For some demos showing how to use this class, look in the
* {@code org.jfree.graphics2d.demo} package in the{@code src} directory.
*/
public final class SVGGraphics2D extends Graphics2D {
/** The prefix for keys used to identify clip paths. */
private static final String CLIP_KEY_PREFIX = "clip-";
private final int width;
private final int height;
/**
* The shape rendering property to set for the SVG element. Permitted
* values are "auto", "crispEdges", "geometricPrecision" and
* "optimizeSpeed".
*/
private String shapeRendering = "auto";
/**
* The text rendering property for the SVG element. Permitted values
* are "auto", "optimizeSpeed", "optimizeLegibility" and
* "geometricPrecision".
*/
private String textRendering = "auto";
/** Rendering hints (see SVGHints). */
private final RenderingHints hints;
/**
* A flag that controls whether or not the KEY_STROKE_CONTROL hint is
* checked.
*/
private boolean checkStrokeControlHint = true;
/**
* The number of decimal places to use when writing the matrix values
* for transformations.
*/
private int transformDP;
/**
* The decimal formatter for transform matrices.
*/
private DecimalFormat transformFormat;
/**
* The number of decimal places to use when writing coordinates for
* geometrical shapes.
*/
private int geometryDP;
/**
* The decimal formatter for coordinates of geometrical shapes.
*/
private DecimalFormat geometryFormat;
/** The buffer that accumulates the SVG output. */
private StringBuilder sb;
/**
* A prefix for the keys used in the DEFS element. This can be used to
* ensure that the keys are unique when creating more than one SVG element
* for a single HTML page.
*/
private String defsKeyPrefix = "";
/**
* A map of all the gradients used, and the corresponding id. When
* generating the SVG file, all the gradient paints used must be defined
* in the defs element.
*/
private Map gradientPaints
= new HashMap();
/**
* A map of all the linear gradients used, and the corresponding id. When
* generating the SVG file, all the linear gradient paints used must be
* defined in the defs element.
*/
private Map linearGradientPaints
= new HashMap();
/**
* A map of all the radial gradients used, and the corresponding id. When
* generating the SVG file, all the radial gradient paints used must be
* defined in the defs element.
*/
private Map radialGradientPaints
= new HashMap();
/**
* A list of the registered clip regions. These will be written to the
* DEFS element.
*/
private List clipPaths = new ArrayList();
/**
* The filename prefix for images that are referenced rather than
* embedded but don't have an {@code href} supplied via the
* {@link #KEY_IMAGE_HREF} hint.
*/
private String filePrefix;
/**
* The filename suffix for images that are referenced rather than
* embedded but don't have an {@code href} supplied via the
* {@link #KEY_IMAGE_HREF} hint.
*/
private String fileSuffix;
/**
* A list of images that are referenced but not embedded in the SVG.
* After the SVG is generated, the caller can make use of this list to
* write PNG files if they don't already exist.
*/
private List imageElements;
/** The user clip (can be null). */
private Shape clip;
/** The reference for the current clip. */
private String clipRef;
/** The current transform. */
private AffineTransform transform = new AffineTransform();
private Paint paint = Color.BLACK;
private Color color = Color.BLACK;
private Composite composite = AlphaComposite.getInstance(
AlphaComposite.SRC_OVER, 1.0f);
/** The current stroke. */
private Stroke stroke = new BasicStroke(1.0f);
/**
* The width of the SVG stroke to use when the user supplies a
* BasicStroke with a width of 0.0 (in this case the Java specification
* says "If width is set to 0.0f, the stroke is rendered as the thinnest
* possible line for the target device and the antialias hint setting.")
*/
private double zeroStrokeWidth;
/** The last font that was set. */
private Font font;
/**
* The font render context. The fractional metrics flag solves the glyph
* positioning issue identified by Christoph Nahr:
* http://news.kynosarges.org/2014/06/28/glyph-positioning-in-jfreesvg-orsonpdf/
*/
private final FontRenderContext fontRenderContext = new FontRenderContext(
null, false, true);
/** Maps font family names to alternates (or leaves them unchanged). */
private FontMapper fontMapper;
/** The background color, used by clearRect(). */
private Color background = Color.BLACK;
/** A hidden image used for font metrics. */
private final BufferedImage fmImage = new BufferedImage(10, 10,
BufferedImage.TYPE_INT_RGB);
/**
* An instance that is lazily instantiated in drawLine and then
* subsequently reused to avoid creating a lot of garbage.
*/
private Line2D line;
/**
* An instance that is lazily instantiated in fillRect and then
* subsequently reused to avoid creating a lot of garbage.
*/
Rectangle2D rect;
/**
* An instance that is lazily instantiated in draw/fillRoundRect and then
* subsequently reused to avoid creating a lot of garbage.
*/
private RoundRectangle2D roundRect;
/**
* An instance that is lazily instantiated in draw/fillOval and then
* subsequently reused to avoid creating a lot of garbage.
*/
private Ellipse2D oval;
/**
* An instance that is lazily instantiated in draw/fillArc and then
* subsequently reused to avoid creating a lot of garbage.
*/
private Arc2D arc;
/**
* If the current paint is an instance of {@link GradientPaint}, this
* field will contain the reference id that is used in the DEFS element
* for that linear gradient.
*/
private String gradientPaintRef = null;
/**
* The device configuration (this is lazily instantiated in the
* getDeviceConfiguration() method).
*/
private GraphicsConfiguration deviceConfiguration;
/** A set of element IDs. */
private final Set elementIDs;
/**
* Creates a new instance with the specified width and height.
*
* @param width the width of the SVG element.
* @param height the height of the SVG element.
*/
public SVGGraphics2D(int width, int height) {
this(width, height, new StringBuilder());
}
/**
* Creates a new instance with the specified width and height that will
* populate the supplied StringBuilder instance. This constructor is
* used by the {@link #create()} method, but won't normally be called
* directly by user code.
*
* @param width the width of the SVG element.
* @param height the height of the SVG element.
* @param sb the string builder ({@code null} not permitted).
*
* @since 2.0
*/
public SVGGraphics2D(int width, int height, StringBuilder sb) {
this.width = width;
this.height = height;
this.shapeRendering = "auto";
this.textRendering = "auto";
this.defsKeyPrefix = String.valueOf(System.nanoTime());
this.clip = null;
this.imageElements = new ArrayList();
this.filePrefix = "image-";
this.fileSuffix = ".png";
this.font = new Font("SansSerif", Font.PLAIN, 12);
this.fontMapper = new StandardFontMapper();
this.zeroStrokeWidth = 0.1;
this.sb = sb;
this.hints = new RenderingHints(SVGHints.KEY_IMAGE_HANDLING,
SVGHints.VALUE_IMAGE_HANDLING_EMBED);
// force the formatters to use a '.' for the decimal point
DecimalFormatSymbols dfs = new DecimalFormatSymbols();
dfs.setDecimalSeparator('.');
this.transformFormat = new DecimalFormat("0.######", dfs);
this.geometryFormat = new DecimalFormat("0.##", dfs);
this.elementIDs = new HashSet();
}
/**
* Creates a new instance that is a child of the supplied parent.
*
* @param parent
*/
private SVGGraphics2D(SVGGraphics2D parent) {
this(parent.width, parent.height, parent.sb);
this.shapeRendering = parent.shapeRendering;
this.textRendering = parent.textRendering;
getRenderingHints().add(parent.hints);
this.checkStrokeControlHint = parent.checkStrokeControlHint;
setTransformDP(parent.transformDP);
setGeometryDP(parent.geometryDP);
this.defsKeyPrefix = parent.defsKeyPrefix;
this.gradientPaints = parent.gradientPaints;
this.linearGradientPaints = parent.linearGradientPaints;
this.radialGradientPaints = parent.radialGradientPaints;
this.clipPaths = parent.clipPaths;
this.filePrefix = parent.filePrefix;
this.fileSuffix = parent.fileSuffix;
this.imageElements = parent.imageElements;
this.zeroStrokeWidth = parent.zeroStrokeWidth;
}
/**
* Returns the width for the SVG element, specified in the constructor.
* This value will be written to the SVG element returned by the
* {@link #getSVGElement()} method.
*
* @return The width for the SVG element.
*/
public int getWidth() {
return this.width;
}
/**
* Returns the height for the SVG element, specified in the constructor.
* This value will be written to the SVG element returned by the
* {@link #getSVGElement()} method.
*
* @return The height for the SVG element.
*/
public int getHeight() {
return this.height;
}
/**
* Returns the value of the 'shape-rendering' property that will be
* written to the SVG element. The default value is "auto".
*
* @return The shape rendering property.
*
* @since 2.0
*/
public String getShapeRendering() {
return this.shapeRendering;
}
/**
* Sets the value of the 'shape-rendering' property that will be written to
* the SVG element. Permitted values are "auto", "crispEdges",
* "geometricPrecision", "inherit" and "optimizeSpeed".
*
* @param value the new value.
*
* @since 2.0
*/
public void setShapeRendering(String value) {
if (!value.equals("auto") && !value.equals("crispEdges")
&& !value.equals("geometricPrecision")
&& !value.equals("optimizeSpeed")) {
throw new IllegalArgumentException("Unrecognised value: " + value);
}
this.shapeRendering = value;
}
/**
* Returns the value of the 'text-rendering' property that will be
* written to the SVG element. The default value is "auto".
*
* @return The text rendering property.
*
* @since 2.0
*/
public String getTextRendering() {
return this.textRendering;
}
/**
* Sets the value of the 'text-rendering' property that will be written to
* the SVG element. Permitted values are "auto", "optimizeSpeed",
* "optimizeLegibility" and "geometricPrecision".
*
* @param value the new value.
*
* @since 2.0
*/
public void setTextRendering(String value) {
if (!value.equals("auto") && !value.equals("optimizeSpeed")
&& !value.equals("optimizeLegibility")
&& !value.equals("geometricPrecision")) {
throw new IllegalArgumentException("Unrecognised value: " + value);
}
this.textRendering = value;
}
/**
* Returns the flag that controls whether or not this object will observe
* the {@code KEY_STROKE_CONTROL} rendering hint. The default value is
* {@code true}.
*
* @return A boolean.
*
* @see #setCheckStrokeControlHint(boolean)
* @since 2.0
*/
public boolean getCheckStrokeControlHint() {
return this.checkStrokeControlHint;
}
/**
* Sets the flag that controls whether or not this object will observe
* the {@code KEY_STROKE_CONTROL} rendering hint. When enabled (the
* default), a hint to normalise strokes will write a {@code stroke-style}
* attribute with the value {@code crispEdges}.
*
* @param check the new flag value.
*
* @see #getCheckStrokeControlHint()
* @since 2.0
*/
public void setCheckStrokeControlHint(boolean check) {
this.checkStrokeControlHint = check;
}
/**
* Returns the prefix used for all keys in the DEFS element. The default
* value is {@code String.valueOf(System.nanoTime())}.
*
* @return The prefix string (never {@code null}).
*
* @since 1.9
*/
public String getDefsKeyPrefix() {
return this.defsKeyPrefix;
}
/**
* Sets the prefix that will be used for all keys in the DEFS element.
* If required, this must be set immediately after construction (before any
* content generation methods have been called).
*
* @param prefix the prefix ({@code null} not permitted).
*
* @since 1.9
*/
public void setDefsKeyPrefix(String prefix) {
Args.nullNotPermitted(prefix, "prefix");
this.defsKeyPrefix = prefix;
}
/**
* Returns the number of decimal places used to write the transformation
* matrices in the SVG output. The default value is 6.
*
* Note that there is a separate attribute to control the number of decimal
* places for geometrical elements in the output (see
* {@link #getGeometryDP()}).
*
* @return The number of decimal places.
*
* @see #setTransformDP(int)
*/
public int getTransformDP() {
return this.transformDP;
}
/**
* Sets the number of decimal places used to write the transformation
* matrices in the SVG output. Values in the range 1 to 10 will be used
* to configure a formatter to that number of decimal places, for all other
* values we revert to the normal {@code String} conversion of
* {@code double} primitives (approximately 16 decimals places).
*
* Note that there is a separate attribute to control the number of decimal
* places for geometrical elements in the output (see
* {@link #setGeometryDP(int)}).
*
* @param dp the number of decimal places (normally 1 to 10).
*
* @see #getTransformDP()
*/
public void setTransformDP(int dp) {
this.transformDP = dp;
if (dp < 1 || dp > 10) {
this.transformFormat = null;
return;
}
DecimalFormatSymbols dfs = new DecimalFormatSymbols();
dfs.setDecimalSeparator('.');
this.transformFormat = new DecimalFormat("0."
+ "##########".substring(0, dp), dfs);
}
/**
* Returns the number of decimal places used to write the coordinates
* of geometrical shapes. The default value is 2.
*
* Note that there is a separate attribute to control the number of decimal
* places for transform matrices in the output (see
* {@link #getTransformDP()}).
*
* @return The number of decimal places.
*/
public int getGeometryDP() {
return this.geometryDP;
}
/**
* Sets the number of decimal places used to write the coordinates of
* geometrical shapes in the SVG output. Values in the range 1 to 10 will
* be used to configure a formatter to that number of decimal places, for
* all other values we revert to the normal String conversion of double
* primitives (approximately 16 decimals places).
*
* Note that there is a separate attribute to control the number of decimal
* places for transform matrices in the output (see
* {@link #setTransformDP(int)}).
*
* @param dp the number of decimal places (normally 1 to 10).
*/
public void setGeometryDP(int dp) {
this.geometryDP = dp;
if (dp < 1 || dp > 10) {
this.geometryFormat = null;
return;
}
DecimalFormatSymbols dfs = new DecimalFormatSymbols();
dfs.setDecimalSeparator('.');
this.geometryFormat = new DecimalFormat("0."
+ "##########".substring(0, dp), dfs);
}
/**
* Returns the prefix used to generate a filename for an image that is
* referenced from, rather than embedded in, the SVG element.
*
* @return The file prefix (never {@code null}).
*
* @since 1.5
*/
public String getFilePrefix() {
return this.filePrefix;
}
/**
* Sets the prefix used to generate a filename for any image that is
* referenced from the SVG element.
*
* @param prefix the new prefix ({@code null} not permitted).
*
* @since 1.5
*/
public void setFilePrefix(String prefix) {
Args.nullNotPermitted(prefix, "prefix");
this.filePrefix = prefix;
}
/**
* Returns the suffix used to generate a filename for an image that is
* referenced from, rather than embedded in, the SVG element.
*
* @return The file suffix (never {@code null}).
*
* @since 1.5
*/
public String getFileSuffix() {
return this.fileSuffix;
}
/**
* Sets the suffix used to generate a filename for any image that is
* referenced from the SVG element.
*
* @param suffix the new prefix ({@code null} not permitted).
*
* @since 1.5
*/
public void setFileSuffix(String suffix) {
Args.nullNotPermitted(suffix, "suffix");
this.fileSuffix = suffix;
}
/**
* Returns the width to use for the SVG stroke when the AWT stroke
* specified has a zero width (the default value is {@code 0.1}). In
* the Java specification for {@code BasicStroke} it states "If width
* is set to 0.0f, the stroke is rendered as the thinnest possible
* line for the target device and the antialias hint setting." We don't
* have a means to implement that accurately since we must specify a fixed
* width.
*
* @return The width.
*
* @since 1.9
*/
public double getZeroStrokeWidth() {
return this.zeroStrokeWidth;
}
/**
* Sets the width to use for the SVG stroke when the current AWT stroke
* has a width of 0.0.
*
* @param width the new width (must be 0 or greater).
*
* @since 1.9
*/
public void setZeroStrokeWidth(double width) {
if (width < 0.0) {
throw new IllegalArgumentException("Width cannot be negative.");
}
this.zeroStrokeWidth = width;
}
/**
* Returns the device configuration associated with this
* {@code Graphics2D}.
*
* @return The graphics configuration.
*/
@Override
public GraphicsConfiguration getDeviceConfiguration() {
if (this.deviceConfiguration == null) {
this.deviceConfiguration = new SVGGraphicsConfiguration(this.width,
this.height);
}
return this.deviceConfiguration;
}
/**
* Creates a new graphics object that is a copy of this graphics object
* (except that it has not accumulated the drawing operations). Not sure
* yet when or why this would be useful when creating SVG output.
*
* @return A new graphics object.
*/
@Override
public Graphics create() {
SVGGraphics2D copy = new SVGGraphics2D(this);
copy.setRenderingHints(getRenderingHints());
copy.setTransform(getTransform());
copy.setClip(getClip());
copy.setPaint(getPaint());
copy.setColor(getColor());
copy.setComposite(getComposite());
copy.setStroke(getStroke());
copy.setFont(getFont());
copy.setBackground(getBackground());
copy.setFilePrefix(getFilePrefix());
copy.setFileSuffix(getFileSuffix());
return copy;
}
/**
* Returns the paint used to draw or fill shapes (or text). The default
* value is {@link Color#BLACK}.
*
* @return The paint (never {@code null}).
*
* @see #setPaint(java.awt.Paint)
*/
@Override
public Paint getPaint() {
return this.paint;
}
/**
* Sets the paint used to draw or fill shapes (or text). If
* {@code paint} is an instance of {@code Color}, this method will
* also update the current color attribute (see {@link #getColor()}). If
* you pass {@code null} to this method, it does nothing (in
* accordance with the JDK specification).
*
* @param paint the paint ({@code null} is permitted but ignored).
*
* @see #getPaint()
*/
@Override
public void setPaint(Paint paint) {
if (paint == null) {
return;
}
this.paint = paint;
this.gradientPaintRef = null;
if (paint instanceof Color) {
setColor((Color) paint);
} else if (paint instanceof GradientPaint) {
GradientPaint gp = (GradientPaint) paint;
GradientPaintKey key = new GradientPaintKey(gp);
String ref = this.gradientPaints.get(key);
if (ref == null) {
int count = this.gradientPaints.keySet().size();
String id = this.defsKeyPrefix + "gp" + count;
this.elementIDs.add(id);
this.gradientPaints.put(key, id);
this.gradientPaintRef = id;
} else {
this.gradientPaintRef = ref;
}
} else if (paint instanceof LinearGradientPaint) {
LinearGradientPaint lgp = (LinearGradientPaint) paint;
LinearGradientPaintKey key = new LinearGradientPaintKey(lgp);
String ref = this.linearGradientPaints.get(key);
if (ref == null) {
int count = this.linearGradientPaints.keySet().size();
String id = this.defsKeyPrefix + "lgp" + count;
this.elementIDs.add(id);
this.linearGradientPaints.put(key, id);
this.gradientPaintRef = id;
}
} else if (paint instanceof RadialGradientPaint) {
RadialGradientPaint rgp = (RadialGradientPaint) paint;
RadialGradientPaintKey key = new RadialGradientPaintKey(rgp);
String ref = this.radialGradientPaints.get(key);
if (ref == null) {
int count = this.radialGradientPaints.keySet().size();
String id = this.defsKeyPrefix + "rgp" + count;
this.elementIDs.add(id);
this.radialGradientPaints.put(key, id);
this.gradientPaintRef = id;
}
}
}
/**
* Returns the foreground color. This method exists for backwards
* compatibility in AWT, you should use the {@link #getPaint()} method.
*
* @return The foreground color (never {@code null}).
*
* @see #getPaint()
*/
@Override
public Color getColor() {
return this.color;
}
/**
* Sets the foreground color. This method exists for backwards
* compatibility in AWT, you should use the
* {@link #setPaint(java.awt.Paint)} method.
*
* @param c the color ({@code null} permitted but ignored).
*
* @see #setPaint(java.awt.Paint)
*/
@Override
public void setColor(Color c) {
if (c == null) {
return;
}
this.color = c;
this.paint = c;
}
/**
* Returns the background color. The default value is {@link Color#BLACK}.
* This is used by the {@link #clearRect(int, int, int, int)} method.
*
* @return The background color (possibly {@code null}).
*
* @see #setBackground(java.awt.Color)
*/
@Override
public Color getBackground() {
return this.background;
}
/**
* Sets the background color. This is used by the
* {@link #clearRect(int, int, int, int)} method. The reference
* implementation allows {@code null} for the background color so
* we allow that too (but for that case, the clearRect method will do
* nothing).
*
* @param color the color ({@code null} permitted).
*
* @see #getBackground()
*/
@Override
public void setBackground(Color color) {
this.background = color;
}
/**
* Returns the current composite.
*
* @return The current composite (never {@code null}).
*
* @see #setComposite(java.awt.Composite)
*/
@Override
public Composite getComposite() {
return this.composite;
}
/**
* Sets the composite (only {@code AlphaComposite} is handled).
*
* @param comp the composite ({@code null} not permitted).
*
* @see #getComposite()
*/
@Override
public void setComposite(Composite comp) {
if (comp == null) {
throw new IllegalArgumentException("Null 'comp' argument.");
}
this.composite = comp;
}
/**
* Returns the current stroke (used when drawing shapes).
*
* @return The current stroke (never {@code null}).
*
* @see #setStroke(java.awt.Stroke)
*/
@Override
public Stroke getStroke() {
return this.stroke;
}
/**
* Sets the stroke that will be used to draw shapes.
*
* @param s the stroke ({@code null} not permitted).
*
* @see #getStroke()
*/
@Override
public void setStroke(Stroke s) {
if (s == null) {
throw new IllegalArgumentException("Null 's' argument.");
}
this.stroke = s;
}
/**
* Returns the current value for the specified hint. See the
* {@link SVGHints} class for information about the hints that can be
* used with {@code SVGGraphics2D}.
*
* @param hintKey the hint key ({@code null} permitted, but the
* result will be {@code null} also).
*
* @return The current value for the specified hint
* (possibly {@code null}).
*
* @see #setRenderingHint(java.awt.RenderingHints.Key, java.lang.Object)
*/
@Override
public Object getRenderingHint(RenderingHints.Key hintKey) {
return this.hints.get(hintKey);
}
/**
* Sets the value for a hint. See the {@link SVGHints} class for
* information about the hints that can be used with this implementation.
*
* @param hintKey the hint key ({@code null} not permitted).
* @param hintValue the hint value.
*
* @see #getRenderingHint(java.awt.RenderingHints.Key)
*/
@Override
public void setRenderingHint(RenderingHints.Key hintKey, Object hintValue) {
if (hintKey == null) {
throw new NullPointerException("Null 'hintKey' not permitted.");
}
// KEY_BEGIN_GROUP and KEY_END_GROUP are handled as special cases that
// never get stored in the hints map...
if (SVGHints.isBeginGroupKey(hintKey)) {
String groupId = null;
String ref = null;
List otherKeysAndValues = null;
if (hintValue instanceof String) {
groupId = (String) hintValue;
} else if (hintValue instanceof Map) {
Map hintValueMap = (Map) hintValue;
groupId = (String) hintValueMap.get("id");
ref = (String) hintValueMap.get("ref");
for (final Object obj: hintValueMap.entrySet()) {
final Entry e = (Entry) obj;
final Object key = e.getKey();
if ("id".equals(key) || "ref".equals(key)) {
continue;
}
if (otherKeysAndValues == null) {
otherKeysAndValues = new ArrayList();
}
otherKeysAndValues.add(e);
}
}
this.sb.append("");
} else if (SVGHints.isEndGroupKey(hintKey)) {
this.sb.append("\n");
} else if (SVGHints.isElementTitleKey(hintKey) && (hintValue != null)) {
this.sb.append("");
this.sb.append(SVGUtils.escapeForXML(String.valueOf(hintValue)));
this.sb.append(" ");
} else {
this.hints.put(hintKey, hintValue);
}
}
/**
* Returns a copy of the rendering hints. Modifying the returned copy
* will have no impact on the state of this {@code Graphics2D} instance.
*
* @return The rendering hints (never {@code null}).
*
* @see #setRenderingHints(java.util.Map)
*/
@Override
public RenderingHints getRenderingHints() {
return (RenderingHints) this.hints.clone();
}
/**
* Sets the rendering hints to the specified collection.
*
* @param hints the new set of hints ({@code null} not permitted).
*
* @see #getRenderingHints()
*/
@Override
public void setRenderingHints(Map hints) {
this.hints.clear();
addRenderingHints(hints);
}
/**
* Adds all the supplied rendering hints.
*
* @param hints the hints ({@code null} not permitted).
*/
@Override
public void addRenderingHints(Map hints) {
this.hints.putAll(hints);
}
/**
* A utility method that appends an optional element id if one is
* specified via the rendering hints.
*
* @param sb the string builder ({@code null} not permitted).
*/
private void appendOptionalElementIDFromHint(StringBuilder sb) {
String elementID = (String) this.hints.get(SVGHints.KEY_ELEMENT_ID);
if (elementID != null) {
this.hints.put(SVGHints.KEY_ELEMENT_ID, null); // clear it
if (this.elementIDs.contains(elementID)) {
throw new IllegalStateException("The element id "
+ elementID + " is already used.");
} else {
this.elementIDs.add(elementID);
}
this.sb.append("id=\"").append(elementID).append("\" ");
}
}
/**
* Draws the specified shape with the current {@code paint} and
* {@code stroke}. There is direct handling for {@code Line2D},
* {@code Rectangle2D} and {@code Path2D}. All other shapes are
* mapped to a {@code GeneralPath} and then drawn (effectively as
* {@code Path2D} objects).
*
* @param s the shape ({@code null} not permitted).
*
* @see #fill(java.awt.Shape)
*/
@Override
public void draw(Shape s) {
// if the current stroke is not a BasicStroke then it is handled as
// a special case
if (!(this.stroke instanceof BasicStroke)) {
fill(this.stroke.createStrokedShape(s));
return;
}
if (s instanceof Line2D) {
Line2D l = (Line2D) s;
this.sb.append("");
this.sb.append(" ");
} else {
draw(new GeneralPath(s)); // handled as a Path2D next time through
}
}
/**
* Fills the specified shape with the current {@code paint}. There is
* direct handling for {@code Rectangle2D} and {@code Path2D}.
* All other shapes are mapped to a {@code GeneralPath} and then
* filled.
*
* @param s the shape ({@code null} not permitted).
*
* @see #draw(java.awt.Shape)
*/
@Override
public void fill(Shape s) {
if (s instanceof Rectangle2D) {
Rectangle2D r = (Rectangle2D) s;
if (r.isEmpty()) {
return;
}
this.sb.append("");
this.sb.append(" ");
} else {
fill(new GeneralPath(s)); // handled as a Path2D next time through
}
}
/**
* Creates an SVG path string for the supplied Java2D path.
*
* @param path the path ({@code null} not permitted).
*
* @return An SVG path string.
*/
private String getSVGPathData(Path2D path) {
StringBuilder b = new StringBuilder("d=\"");
float[] coords = new float[6];
boolean first = true;
PathIterator iterator = path.getPathIterator(null);
while (!iterator.isDone()) {
int type = iterator.currentSegment(coords);
if (!first) {
b.append(" ");
}
first = false;
switch (type) {
case (PathIterator.SEG_MOVETO):
b.append("M ").append(geomDP(coords[0])).append(" ")
.append(geomDP(coords[1]));
break;
case (PathIterator.SEG_LINETO):
b.append("L ").append(geomDP(coords[0])).append(" ")
.append(geomDP(coords[1]));
break;
case (PathIterator.SEG_QUADTO):
b.append("Q ").append(geomDP(coords[0]))
.append(" ").append(geomDP(coords[1]))
.append(" ").append(geomDP(coords[2]))
.append(" ").append(geomDP(coords[3]));
break;
case (PathIterator.SEG_CUBICTO):
b.append("C ").append(geomDP(coords[0])).append(" ")
.append(geomDP(coords[1])).append(" ")
.append(geomDP(coords[2])).append(" ")
.append(geomDP(coords[3])).append(" ")
.append(geomDP(coords[4])).append(" ")
.append(geomDP(coords[5]));
break;
case (PathIterator.SEG_CLOSE):
b.append("Z ");
break;
default:
break;
}
iterator.next();
}
return b.append("\"").toString();
}
/**
* Returns the current alpha (transparency) in the range 0.0 to 1.0.
* If the current composite is an {@link AlphaComposite} we read the alpha
* value from there, otherwise this method returns 1.0.
*
* @return The current alpha (transparency) in the range 0.0 to 1.0.
*/
private float getAlpha() {
float alpha = 1.0f;
if (this.composite instanceof AlphaComposite) {
AlphaComposite ac = (AlphaComposite) this.composite;
alpha = ac.getAlpha();
}
return alpha;
}
/**
* Returns an SVG color string based on the current paint. To handle
* {@code GradientPaint} we rely on the {@code setPaint()} method
* having set the {@code gradientPaintRef} attribute.
*
* @return An SVG color string.
*/
private String svgColorStr() {
String result = "black;";
if (this.paint instanceof Color) {
return rgbColorStr((Color) this.paint);
} else if (this.paint instanceof GradientPaint
|| this.paint instanceof LinearGradientPaint
|| this.paint instanceof RadialGradientPaint) {
return "url(#" + this.gradientPaintRef + ")";
}
return result;
}
/**
* Returns the SVG RGB color string for the specified color.
*
* @param c the color ({@code null} not permitted).
*
* @return The SVG RGB color string.
*/
private String rgbColorStr(Color c) {
StringBuilder b = new StringBuilder("rgb(");
b.append(c.getRed()).append(",").append(c.getGreen()).append(",")
.append(c.getBlue()).append(")");
return b.toString();
}
/**
* Returns a string representing the specified color in RGBA format.
*
* @param c the color ({@code null} not permitted).
*
* @return The SVG RGBA color string.
*/
private String rgbaColorStr(Color c) {
StringBuilder b = new StringBuilder("rgba(");
double alphaPercent = c.getAlpha() / 255.0;
b.append(c.getRed()).append(",").append(c.getGreen()).append(",")
.append(c.getBlue());
b.append(",").append(transformDP(alphaPercent));
b.append(")");
return b.toString();
}
private static final String DEFAULT_STROKE_CAP = "butt";
private static final String DEFAULT_STROKE_JOIN = "miter";
private static final float DEFAULT_MITER_LIMIT = 4.0f;
/**
* Returns a stroke style string based on the current stroke and
* alpha settings.
*
* @return A stroke style string.
*/
private String strokeStyle() {
double strokeWidth = 1.0f;
String strokeCap = DEFAULT_STROKE_CAP;
String strokeJoin = DEFAULT_STROKE_JOIN;
float miterLimit = DEFAULT_MITER_LIMIT;
float[] dashArray = new float[0];
if (this.stroke instanceof BasicStroke) {
BasicStroke bs = (BasicStroke) this.stroke;
strokeWidth = bs.getLineWidth() > 0.0 ? bs.getLineWidth()
: this.zeroStrokeWidth;
switch (bs.getEndCap()) {
case BasicStroke.CAP_ROUND:
strokeCap = "round";
break;
case BasicStroke.CAP_SQUARE:
strokeCap = "square";
break;
case BasicStroke.CAP_BUTT:
default:
// already set to "butt"
}
switch (bs.getLineJoin()) {
case BasicStroke.JOIN_BEVEL:
strokeJoin = "bevel";
break;
case BasicStroke.JOIN_ROUND:
strokeJoin = "round";
break;
case BasicStroke.JOIN_MITER:
default:
// already set to "miter"
}
miterLimit = bs.getMiterLimit();
dashArray = bs.getDashArray();
}
StringBuilder b = new StringBuilder();
b.append("stroke-width: ").append(strokeWidth).append(";");
b.append("stroke: ").append(svgColorStr()).append(";");
b.append("stroke-opacity: ").append(getColorAlpha() * getAlpha())
.append(";");
if (!strokeCap.equals(DEFAULT_STROKE_CAP)) {
b.append("stroke-linecap: ").append(strokeCap).append(";");
}
if (!strokeJoin.equals(DEFAULT_STROKE_JOIN)) {
b.append("stroke-linejoin: ").append(strokeJoin).append(";");
}
if (Math.abs(DEFAULT_MITER_LIMIT - miterLimit) < 0.001) {
b.append("stroke-miterlimit: ").append(geomDP(miterLimit));
}
if (dashArray != null && dashArray.length != 0) {
b.append("stroke-dasharray: ");
for (int i = 0; i < dashArray.length; i++) {
if (i != 0) b.append(", ");
b.append(dashArray[i]);
}
b.append(";");
}
if (this.checkStrokeControlHint) {
Object hint = getRenderingHint(RenderingHints.KEY_STROKE_CONTROL);
if (RenderingHints.VALUE_STROKE_NORMALIZE.equals(hint)
&& !this.shapeRendering.equals("crispEdges")) {
b.append("shape-rendering:crispEdges;");
}
if (RenderingHints.VALUE_STROKE_PURE.equals(hint)
&& !this.shapeRendering.equals("geometricPrecision")) {
b.append("shape-rendering:geometricPrecision;");
}
}
return b.toString();
}
/**
* Returns the alpha value of the current {@code paint}, or {@code 1.0f} if
* it is not an instance of {@code Color}.
*
* @return The alpha value (in the range {@code 0.0} to {@code 1.0}.
*/
private float getColorAlpha() {
if (this.paint instanceof Color) {
Color c = (Color) this.paint;
return c.getAlpha() / 255.0f;
}
return 1f;
}
/**
* Returns a fill style string based on the current paint and
* alpha settings.
*
* @return A fill style string.
*/
private String getSVGFillStyle() {
StringBuilder b = new StringBuilder();
b.append("fill: ").append(svgColorStr()).append("; ");
b.append("fill-opacity: ").append(getColorAlpha() * getAlpha());
return b.toString();
}
/**
* Returns the current font used for drawing text.
*
* @return The current font (never {@code null}).
*
* @see #setFont(java.awt.Font)
*/
@Override
public Font getFont() {
return this.font;
}
/**
* Sets the font to be used for drawing text.
*
* @param font the font ({@code null} is permitted but ignored).
*
* @see #getFont()
*/
@Override
public void setFont(Font font) {
if (font == null) {
return;
}
this.font = font;
}
/**
* Returns the font mapper (an object that optionally maps font family
* names to alternates). The default mapper will convert Java logical
* font names to the equivalent SVG generic font name, and leave all other
* font names unchanged.
*
* @return The font mapper (never {@code null}).
*
* @see #setFontMapper(org.jfree.graphics2d.svg.FontMapper)
* @since 1.5
*/
public FontMapper getFontMapper() {
return this.fontMapper;
}
/**
* Sets the font mapper.
*
* @param mapper the font mapper ({@code null} not permitted).
*
* @since 1.5
*/
public void setFontMapper(FontMapper mapper) {
Args.nullNotPermitted(mapper, "mapper");
this.fontMapper = mapper;
}
/**
* Returns a string containing font style info.
*
* @return A string containing font style info.
*/
private String getSVGFontStyle() {
StringBuilder b = new StringBuilder();
b.append("fill: ").append(svgColorStr()).append("; ");
b.append("fill-opacity: ").append(getColorAlpha() * getAlpha())
.append("; ");
String fontFamily = this.fontMapper.mapFont(this.font.getFamily());
b.append("font-family: ").append(fontFamily).append("; ");
b.append("font-size: ").append(this.font.getSize()).append("px; ");
if (this.font.isBold()) {
b.append("font-weight: bold; ");
}
if (this.font.isItalic()) {
b.append("font-style: italic; ");
}
return b.toString();
}
/**
* Returns the font metrics for the specified font.
*
* @param f the font.
*
* @return The font metrics.
*/
@Override
public FontMetrics getFontMetrics(Font f) {
return this.fmImage.createGraphics().getFontMetrics(f);
}
/**
* Returns the font render context.
*
* @return The font render context (never {@code null}).
*/
@Override
public FontRenderContext getFontRenderContext() {
return this.fontRenderContext;
}
/**
* Draws a string at {@code (x, y)}. The start of the text at the
* baseline level will be aligned with the {@code (x, y)} point.
*
* Note that you can make use of the {@link SVGHints#KEY_TEXT_RENDERING}
* hint when drawing strings (this is completely optional though).
*
* @param str the string ({@code null} not permitted).
* @param x the x-coordinate.
* @param y the y-coordinate.
*
* @see #drawString(java.lang.String, float, float)
*/
@Override
public void drawString(String str, int x, int y) {
drawString(str, (float) x, (float) y);
}
/**
* Draws a string at {@code (x, y)}. The start of the text at the
* baseline level will be aligned with the {@code (x, y)} point.
*
* Note that you can make use of the {@link SVGHints#KEY_TEXT_RENDERING}
* hint when drawing strings (this is completely optional though).
*
* @param str the string ({@code null} not permitted).
* @param x the x-coordinate.
* @param y the y-coordinate.
*/
@Override
public void drawString(String str, float x, float y) {
if (str == null) {
throw new NullPointerException("Null 'str' argument.");
}
if (!SVGHints.VALUE_DRAW_STRING_TYPE_VECTOR.equals(
this.hints.get(SVGHints.KEY_DRAW_STRING_TYPE))) {
this.sb.append("");
this.sb.append("");
this.sb.append(SVGUtils.escapeForXML(str)).append(" ");
this.sb.append(" ");
} else {
AttributedString as = new AttributedString(str,
this.font.getAttributes());
drawString(as.getIterator(), x, y);
}
}
/**
* Draws a string of attributed characters at {@code (x, y)}. The
* call is delegated to
* {@link #drawString(AttributedCharacterIterator, float, float)}.
*
* @param iterator an iterator for the characters.
* @param x the x-coordinate.
* @param y the x-coordinate.
*/
@Override
public void drawString(AttributedCharacterIterator iterator, int x, int y) {
drawString(iterator, (float) x, (float) y);
}
/**
* Draws a string of attributed characters at {@code (x, y)}.
*
* @param iterator an iterator over the characters ({@code null} not
* permitted).
* @param x the x-coordinate.
* @param y the y-coordinate.
*/
@Override
public void drawString(AttributedCharacterIterator iterator, float x,
float y) {
Set s = iterator.getAllAttributeKeys();
if (!s.isEmpty()) {
TextLayout layout = new TextLayout(iterator,
getFontRenderContext());
layout.draw(this, x, y);
} else {
StringBuilder strb = new StringBuilder();
iterator.first();
for (int i = iterator.getBeginIndex(); i < iterator.getEndIndex();
i++) {
strb.append(iterator.current());
iterator.next();
}
drawString(strb.toString(), x, y);
}
}
/**
* Draws the specified glyph vector at the location {@code (x, y)}.
*
* @param g the glyph vector ({@code null} not permitted).
* @param x the x-coordinate.
* @param y the y-coordinate.
*/
@Override
public void drawGlyphVector(GlyphVector g, float x, float y) {
fill(g.getOutline(x, y));
}
/**
* Applies the translation {@code (tx, ty)}. This call is delegated
* to {@link #translate(double, double)}.
*
* @param tx the x-translation.
* @param ty the y-translation.
*
* @see #translate(double, double)
*/
@Override
public void translate(int tx, int ty) {
translate((double) tx, (double) ty);
}
/**
* Applies the translation {@code (tx, ty)}.
*
* @param tx the x-translation.
* @param ty the y-translation.
*/
@Override
public void translate(double tx, double ty) {
AffineTransform t = getTransform();
t.translate(tx, ty);
setTransform(t);
}
/**
* Applies a rotation (anti-clockwise) about {@code (0, 0)}.
*
* @param theta the rotation angle (in radians).
*/
@Override
public void rotate(double theta) {
AffineTransform t = getTransform();
t.rotate(theta);
setTransform(t);
}
/**
* Applies a rotation (anti-clockwise) about {@code (x, y)}.
*
* @param theta the rotation angle (in radians).
* @param x the x-coordinate.
* @param y the y-coordinate.
*/
@Override
public void rotate(double theta, double x, double y) {
translate(x, y);
rotate(theta);
translate(-x, -y);
}
/**
* Applies a scale transformation.
*
* @param sx the x-scaling factor.
* @param sy the y-scaling factor.
*/
@Override
public void scale(double sx, double sy) {
AffineTransform t = getTransform();
t.scale(sx, sy);
setTransform(t);
}
/**
* Applies a shear transformation. This is equivalent to the following
* call to the {@code transform} method:
*
* -
* {@code transform(AffineTransform.getShearInstance(shx, shy));}
*
*
* @param shx the x-shear factor.
* @param shy the y-shear factor.
*/
@Override
public void shear(double shx, double shy) {
transform(AffineTransform.getShearInstance(shx, shy));
}
/**
* Applies this transform to the existing transform by concatenating it.
*
* @param t the transform ({@code null} not permitted).
*/
@Override
public void transform(AffineTransform t) {
AffineTransform tx = getTransform();
tx.concatenate(t);
setTransform(tx);
}
/**
* Returns a copy of the current transform.
*
* @return A copy of the current transform (never {@code null}).
*
* @see #setTransform(java.awt.geom.AffineTransform)
*/
@Override
public AffineTransform getTransform() {
return (AffineTransform) this.transform.clone();
}
/**
* Sets the transform.
*
* @param t the new transform ({@code null} permitted, resets to the
* identity transform).
*
* @see #getTransform()
*/
@Override
public void setTransform(AffineTransform t) {
if (t == null) {
this.transform = new AffineTransform();
} else {
this.transform = new AffineTransform(t);
}
this.clipRef = null;
}
/**
* Returns {@code true} if the rectangle (in device space) intersects
* with the shape (the interior, if {@code onStroke} is {@code false},
* otherwise the stroked outline of the shape).
*
* @param rect a rectangle (in device space).
* @param s the shape.
* @param onStroke test the stroked outline only?
*
* @return A boolean.
*/
@Override
public boolean hit(Rectangle rect, Shape s, boolean onStroke) {
Shape ts;
if (onStroke) {
ts = this.transform.createTransformedShape(
this.stroke.createStrokedShape(s));
} else {
ts = this.transform.createTransformedShape(s);
}
if (!rect.getBounds2D().intersects(ts.getBounds2D())) {
return false;
}
Area a1 = new Area(rect);
Area a2 = new Area(ts);
a1.intersect(a2);
return !a1.isEmpty();
}
/**
* Does nothing in this {@code SVGGraphics2D} implementation.
*/
@Override
public void setPaintMode() {
// do nothing
}
/**
* Does nothing in this {@code SVGGraphics2D} implementation.
*
* @param c ignored
*/
@Override
public void setXORMode(Color c) {
// do nothing
}
/**
* Returns the bounds of the user clipping region.
*
* @return The clip bounds (possibly {@code null}).
*
* @see #getClip()
*/
@Override
public Rectangle getClipBounds() {
if (this.clip == null) {
return null;
}
return getClip().getBounds();
}
/**
* Returns the user clipping region. The initial default value is
* {@code null}.
*
* @return The user clipping region (possibly {@code null}).
*
* @see #setClip(java.awt.Shape)
*/
@Override
public Shape getClip() {
if (this.clip == null) {
return null;
}
AffineTransform inv;
try {
inv = this.transform.createInverse();
return inv.createTransformedShape(this.clip);
} catch (NoninvertibleTransformException ex) {
return null;
}
}
/**
* Sets the user clipping region.
*
* @param shape the new user clipping region ({@code null} permitted).
*
* @see #getClip()
*/
@Override
public void setClip(Shape shape) {
// null is handled fine here...
this.clip = this.transform.createTransformedShape(shape);
this.clipRef = null;
}
/**
* Registers the clip so that we can later write out all the clip
* definitions in the DEFS element.
*
* @param clip the clip (ignored if {@code null})
*/
private String registerClip(Shape clip) {
if (clip == null) {
this.clipRef = null;
return null;
}
// generate the path
String pathStr = getSVGPathData(new Path2D.Double(clip));
int index = this.clipPaths.indexOf(pathStr);
if (index < 0) {
this.clipPaths.add(pathStr);
index = this.clipPaths.size() - 1;
}
return this.defsKeyPrefix + CLIP_KEY_PREFIX + index;
}
private String transformDP(double d) {
if (this.transformFormat != null) {
return transformFormat.format(d);
} else {
return String.valueOf(d);
}
}
private String geomDP(double d) {
if (this.geometryFormat != null) {
return geometryFormat.format(d);
} else {
return String.valueOf(d);
}
}
private String getSVGTransform(AffineTransform t) {
StringBuilder b = new StringBuilder("matrix(");
b.append(transformDP(t.getScaleX())).append(",");
b.append(transformDP(t.getShearY())).append(",");
b.append(transformDP(t.getShearX())).append(",");
b.append(transformDP(t.getScaleY())).append(",");
b.append(transformDP(t.getTranslateX())).append(",");
b.append(transformDP(t.getTranslateY())).append(")");
return b.toString();
}
/**
* Clips to the intersection of the current clipping region and the
* specified shape.
*
* According to the Oracle API specification, this method will accept a
* {@code null} argument, but there is an open bug report (since 2004)
* that suggests this is wrong:
*
*
* http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6206189
*
* @param s the clip shape ({@code null} not permitted).
*/
@Override
public void clip(Shape s) {
if (s instanceof Line2D) {
s = s.getBounds2D();
}
if (this.clip == null) {
setClip(s);
return;
}
Shape ts = this.transform.createTransformedShape(s);
if (!ts.intersects(this.clip.getBounds2D())) {
setClip(new Rectangle2D.Double());
} else {
Area a1 = new Area(ts);
Area a2 = new Area(this.clip);
a1.intersect(a2);
this.clip = new Path2D.Double(a1);
}
this.clipRef = null;
}
/**
* Clips to the intersection of the current clipping region and the
* specified rectangle.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
*/
@Override
public void clipRect(int x, int y, int width, int height) {
setRect(x, y, width, height);
clip(this.rect);
}
/**
* Sets the user clipping region to the specified rectangle.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
*
* @see #getClip()
*/
@Override
public void setClip(int x, int y, int width, int height) {
setRect(x, y, width, height);
setClip(this.rect);
}
/**
* Draws a line from {@code (x1, y1)} to {@code (x2, y2)} using
* the current {@code paint} and {@code stroke}.
*
* @param x1 the x-coordinate of the start point.
* @param y1 the y-coordinate of the start point.
* @param x2 the x-coordinate of the end point.
* @param y2 the x-coordinate of the end point.
*/
@Override
public void drawLine(int x1, int y1, int x2, int y2) {
if (this.line == null) {
this.line = new Line2D.Double(x1, y1, x2, y2);
} else {
this.line.setLine(x1, y1, x2, y2);
}
draw(this.line);
}
/**
* Fills the specified rectangle with the current {@code paint}.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the rectangle width.
* @param height the rectangle height.
*/
@Override
public void fillRect(int x, int y, int width, int height) {
setRect(x, y, width, height);
fill(this.rect);
}
/**
* Clears the specified rectangle by filling it with the current
* background color. If the background color is {@code null}, this
* method will do nothing.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
*
* @see #getBackground()
*/
@Override
public void clearRect(int x, int y, int width, int height) {
if (getBackground() == null) {
return; // we can't do anything
}
Paint saved = getPaint();
setPaint(getBackground());
fillRect(x, y, width, height);
setPaint(saved);
}
/**
* Draws a rectangle with rounded corners using the current
* {@code paint} and {@code stroke}.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
* @param arcWidth the arc-width.
* @param arcHeight the arc-height.
*
* @see #fillRoundRect(int, int, int, int, int, int)
*/
@Override
public void drawRoundRect(int x, int y, int width, int height,
int arcWidth, int arcHeight) {
setRoundRect(x, y, width, height, arcWidth, arcHeight);
draw(this.roundRect);
}
/**
* Fills a rectangle with rounded corners using the current {@code paint}.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
* @param arcWidth the arc-width.
* @param arcHeight the arc-height.
*
* @see #drawRoundRect(int, int, int, int, int, int)
*/
@Override
public void fillRoundRect(int x, int y, int width, int height,
int arcWidth, int arcHeight) {
setRoundRect(x, y, width, height, arcWidth, arcHeight);
fill(this.roundRect);
}
/**
* Draws an oval framed by the rectangle {@code (x, y, width, height)}
* using the current {@code paint} and {@code stroke}.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
*
* @see #fillOval(int, int, int, int)
*/
@Override
public void drawOval(int x, int y, int width, int height) {
setOval(x, y, width, height);
draw(this.oval);
}
/**
* Fills an oval framed by the rectangle {@code (x, y, width, height)}.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
*
* @see #drawOval(int, int, int, int)
*/
@Override
public void fillOval(int x, int y, int width, int height) {
setOval(x, y, width, height);
fill(this.oval);
}
/**
* Draws an arc contained within the rectangle
* {@code (x, y, width, height)}, starting at {@code startAngle}
* and continuing through {@code arcAngle} degrees using
* the current {@code paint} and {@code stroke}.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
* @param startAngle the start angle in degrees, 0 = 3 o'clock.
* @param arcAngle the angle (anticlockwise) in degrees.
*
* @see #fillArc(int, int, int, int, int, int)
*/
@Override
public void drawArc(int x, int y, int width, int height, int startAngle,
int arcAngle) {
setArc(x, y, width, height, startAngle, arcAngle);
draw(this.arc);
}
/**
* Fills an arc contained within the rectangle
* {@code (x, y, width, height)}, starting at {@code startAngle}
* and continuing through {@code arcAngle} degrees, using
* the current {@code paint}
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
* @param startAngle the start angle in degrees, 0 = 3 o'clock.
* @param arcAngle the angle (anticlockwise) in degrees.
*
* @see #drawArc(int, int, int, int, int, int)
*/
@Override
public void fillArc(int x, int y, int width, int height, int startAngle,
int arcAngle) {
setArc(x, y, width, height, startAngle, arcAngle);
fill(this.arc);
}
/**
* Draws the specified multi-segment line using the current
* {@code paint} and {@code stroke}.
*
* @param xPoints the x-points.
* @param yPoints the y-points.
* @param nPoints the number of points to use for the polyline.
*/
@Override
public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints) {
GeneralPath p = GraphicsUtils.createPolygon(xPoints, yPoints, nPoints,
false);
draw(p);
}
/**
* Draws the specified polygon using the current {@code paint} and
* {@code stroke}.
*
* @param xPoints the x-points.
* @param yPoints the y-points.
* @param nPoints the number of points to use for the polygon.
*
* @see #fillPolygon(int[], int[], int) */
@Override
public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints) {
GeneralPath p = GraphicsUtils.createPolygon(xPoints, yPoints, nPoints,
true);
draw(p);
}
/**
* Fills the specified polygon using the current {@code paint}.
*
* @param xPoints the x-points.
* @param yPoints the y-points.
* @param nPoints the number of points to use for the polygon.
*
* @see #drawPolygon(int[], int[], int)
*/
@Override
public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints) {
GeneralPath p = GraphicsUtils.createPolygon(xPoints, yPoints, nPoints,
true);
fill(p);
}
/**
* Returns the bytes representing a PNG format image.
*
* @param img the image to encode.
*
* @return The bytes representing a PNG format image.
*/
private byte[] getPNGBytes(Image img) {
RenderedImage ri;
if (img instanceof RenderedImage) {
ri = (RenderedImage) img;
} else {
BufferedImage bi = new BufferedImage(img.getWidth(null),
img.getHeight(null), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, 0, 0, null);
ri = bi;
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
ImageIO.write(ri, "png", baos);
} catch (IOException ex) {
Logger.getLogger(SVGGraphics2D.class.getName()).log(Level.SEVERE,
"IOException while writing PNG data.", ex);
}
return baos.toByteArray();
}
/**
* Draws an image at the location {@code (x, y)}. Note that the
* {@code observer} is ignored.
*
* @param img the image ({@code null} not permitted).
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param observer ignored.
*
* @return {@code true} if the image is drawn.
*/
@Override
public boolean drawImage(Image img, int x, int y, ImageObserver observer) {
int w = img.getWidth(observer);
if (w < 0) {
return false;
}
int h = img.getHeight(observer);
if (h < 0) {
return false;
}
return drawImage(img, x, y, w, h, observer);
}
/**
* Draws the image into the rectangle defined by {@code (x, y, w, h)}.
* Note that the {@code observer} is ignored (it is not useful in this
* context).
*
* @param img the image.
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param w the width.
* @param h the height.
* @param observer ignored.
*
* @return {@code true} if the image is drawn.
*/
@Override
public boolean drawImage(Image img, int x, int y, int w, int h,
ImageObserver observer) {
// the rendering hints control whether the image is embedded or
// referenced...
Object hint = getRenderingHint(SVGHints.KEY_IMAGE_HANDLING);
if (SVGHints.VALUE_IMAGE_HANDLING_EMBED.equals(hint)) {
this.sb.append(" getSVGImages() {
return this.imageElements;
}
/**
* Returns a new set containing the element IDs that have been used in
* output so far.
*
* @return The element IDs.
*
* @since 1.5
*/
public Set getElementIDs() {
return new HashSet(this.elementIDs);
}
/**
* Returns an element to represent a linear gradient. All the linear
* gradients that are used get written to the DEFS element in the SVG.
*
* @param id the reference id.
* @param paint the gradient.
*
* @return The SVG element.
*/
private String getLinearGradientElement(String id, GradientPaint paint) {
StringBuilder b = new StringBuilder("");
b.append(" ").toString();
}
/**
* Returns an element to represent a linear gradient. All the linear
* gradients that are used get written to the DEFS element in the SVG.
*
* @param id the reference id.
* @param paint the gradient.
*
* @return The SVG element.
*/
private String getLinearGradientElement(String id, LinearGradientPaint paint) {
StringBuilder b = new StringBuilder("");
for (int i = 0; i < paint.getFractions().length; i++) {
Color c = paint.getColors()[i];
float fraction = paint.getFractions()[i];
b.append(" ").toString();
}
/**
* Returns an element to represent a radial gradient. All the radial
* gradients that are used get written to the DEFS element in the SVG.
*
* @param id the reference id.
* @param rgp the radial gradient.
*
* @return The SVG element.
*/
private String getRadialGradientElement(String id, RadialGradientPaint rgp) {
StringBuilder b = new StringBuilder("");
Color[] colors = rgp.getColors();
float[] fractions = rgp.getFractions();
for (int i = 0; i < colors.length; i++) {
Color c = colors[i];
float f = fractions[i];
b.append("");
}
return b.append(" ").toString();
}
/**
* Returns a clip path reference for the current user clip. This is
* written out on all SVG elements that draw or fill shapes or text.
*
* @return A clip path reference.
*/
private String getClipPathRef() {
if (this.clip == null) {
return "";
}
if (this.clipRef == null) {
this.clipRef = registerClip(getClip());
}
StringBuilder b = new StringBuilder();
b.append("clip-path=\"url(#").append(this.clipRef).append(")\"");
return b.toString();
}
/**
* Sets the attributes of the reusable {@link Rectangle2D} object that is
* used by the {@link SVGGraphics2D#drawRect(int, int, int, int)} and
* {@link SVGGraphics2D#fillRect(int, int, int, int)} methods.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
*/
private void setRect(int x, int y, int width, int height) {
if (this.rect == null) {
this.rect = new Rectangle2D.Double(x, y, width, height);
} else {
this.rect.setRect(x, y, width, height);
}
}
/**
* Sets the attributes of the reusable {@link RoundRectangle2D} object that
* is used by the {@link #drawRoundRect(int, int, int, int, int, int)} and
* {@link #fillRoundRect(int, int, int, int, int, int)} methods.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
* @param arcWidth the arc width.
* @param arcHeight the arc height.
*/
private void setRoundRect(int x, int y, int width, int height, int arcWidth,
int arcHeight) {
if (this.roundRect == null) {
this.roundRect = new RoundRectangle2D.Double(x, y, width, height,
arcWidth, arcHeight);
} else {
this.roundRect.setRoundRect(x, y, width, height,
arcWidth, arcHeight);
}
}
/**
* Sets the attributes of the reusable {@link Arc2D} object that is used by
* {@link #drawArc(int, int, int, int, int, int)} and
* {@link #fillArc(int, int, int, int, int, int)} methods.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
* @param startAngle the start angle in degrees, 0 = 3 o'clock.
* @param arcAngle the angle (anticlockwise) in degrees.
*/
private void setArc(int x, int y, int width, int height, int startAngle,
int arcAngle) {
if (this.arc == null) {
this.arc = new Arc2D.Double(x, y, width, height, startAngle,
arcAngle, Arc2D.OPEN);
} else {
this.arc.setArc(x, y, width, height, startAngle, arcAngle,
Arc2D.OPEN);
}
}
/**
* Sets the attributes of the reusable {@link Ellipse2D} object that is
* used by the {@link #drawOval(int, int, int, int)} and
* {@link #fillOval(int, int, int, int)} methods.
*
* @param x the x-coordinate.
* @param y the y-coordinate.
* @param width the width.
* @param height the height.
*/
private void setOval(int x, int y, int width, int height) {
if (this.oval == null) {
this.oval = new Ellipse2D.Double(x, y, width, height);
} else {
this.oval.setFrame(x, y, width, height);
}
}
}