/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.testsupport.graphics;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Component;
import java.awt.Composite;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Paint;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.geom.AffineTransform;
import java.awt.geom.Arc2D;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ColorModel;
import java.awt.image.ImageObserver;
import java.awt.image.RenderedImage;
import java.awt.image.WritableRaster;
import java.awt.image.renderable.RenderableImage;
import java.text.AttributedCharacterIterator;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.Map;
public abstract class AbstractGraphics2D extends Graphics2D implements Cloneable
{
private Graphics2D dg2;
private float alpha;
private Composite composite;
private Paint paint;
private Paint realPaint;
private Color background;
private MediaTracker mediaTracker;
private ArrayList<AbstractGraphics2D> childs;
private AbstractGraphics2D parent;
protected AbstractGraphics2D(final int width, final int height)
{
dg2 = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB).createGraphics();
setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
childs = new ArrayList<AbstractGraphics2D>();
}
/**
* Sets the values of an arbitrary number of preferences for the
* rendering algorithms.
* Only values for the rendering hints that are present in the
* specified <code>Map</code> object are modified.
* All other preferences not present in the specified
* object are left unmodified.
* Hint categories include controls for rendering quality and
* overall time/quality trade-off in the rendering process.
* Refer to the <code>RenderingHints</code> class for definitions of
* some common keys and values.
*
* @param hints the rendering hints to be set
* @see java.awt.RenderingHints
*/
public void addRenderingHints(final Map<?, ?> hints)
{
dg2.getRenderingHints().putAll(hints);
}
/**
* Renders a <code>BufferedImage</code> that is
* filtered with a
* {@link java.awt.image.BufferedImageOp}.
* The rendering attributes applied include the <code>Clip</code>,
* <code>Transform</code>
* and <code>Composite</code> attributes. This is equivalent to:
* <pre>
* img1 = op.filter(img, null);
* drawImage(img1, new AffineTransform(1f,0f,0f,1f,x,y), null);
* </pre>
*
* @param op the filter to be applied to the image before rendering
* @param img the specified <code>BufferedImage</code> to be rendered.
* This method does nothing if <code>img</code> is null.
* @param x the x coordinate of the location in user space where
* the upper left corner of the image is rendered
* @param y the y coordinate of the location in user space where
* the upper left corner of the image is rendered
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void drawImage(final BufferedImage img, final BufferedImageOp op, final int x, final int y)
{
final BufferedImage filter = op.filter(img, null);
drawImage(filter, new AffineTransform(1f, 0f, 0f, 1f, x, y), null);
}
/**
* @see Graphics2D#drawImage(Image, AffineTransform, ImageObserver)
*/
public boolean drawImage(final Image img, final AffineTransform xform, final ImageObserver obs)
{
return drawImage(img, null, xform, null, obs);
}
/**
* @noinspection UseOfObsoleteCollectionType
* @see Graphics2D#drawRenderedImage(java.awt.image.RenderedImage, AffineTransform)
*/
public void drawRenderedImage(final RenderedImage img, final AffineTransform xform)
{
final BufferedImage image;
if (img instanceof BufferedImage)
{
image = (BufferedImage) img;
}
else
{
final ColorModel cm = img.getColorModel();
final int width = img.getWidth();
final int height = img.getHeight();
final WritableRaster raster = cm.createCompatibleWritableRaster(width, height);
final boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
final Hashtable properties = new Hashtable();
final String[] keys = img.getPropertyNames();
if (keys != null)
{
final int keyCount = keys.length;
for (int i = 0; i < keyCount; i++)
{
//noinspection unchecked
properties.put(keys[i], img.getProperty(keys[i]));
}
}
final BufferedImage result = new BufferedImage(cm, raster, isAlphaPremultiplied, properties);
img.copyData(raster);
image = result;
}
drawImage(image, xform, null);
}
/**
* Renders a
* {@link java.awt.image.renderable.RenderableImage},
* applying a transform from image space into user space before drawing.
* The transformation from user space into device space is done with
* the current <code>Transform</code> in the <code>Graphics2D</code>.
* The specified transformation is applied to the image before the
* transform attribute in the <code>Graphics2D</code> context is applied.
* The rendering attributes applied include the <code>Clip</code>,
* <code>Transform</code>, and <code>Composite</code> attributes. Note
* that no rendering is done if the specified transform is
* noninvertible.
* <p/>
* Rendering hints set on the <code>Graphics2D</code> object might
* be used in rendering the <code>RenderableImage</code>.
* If explicit control is required over specific hints recognized by a
* specific <code>RenderableImage</code>, or if knowledge of which hints
* are used is required, then a <code>RenderedImage</code> should be
* obtained directly from the <code>RenderableImage</code>
* and rendered using
* {@link #drawRenderedImage(java.awt.image.RenderedImage, java.awt.geom.AffineTransform) drawRenderedImage}.
*
* @param img the image to be rendered. This method does
* nothing if <code>img</code> is null.
* @param xform the transformation from image space into user space
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
* @see #drawRenderedImage
*/
public void drawRenderableImage(final RenderableImage img, final AffineTransform xform)
{
drawRenderedImage(img.createDefaultRendering(), xform);
}
/**
* Renders the text of the specified <code>String</code>, using the
* current text attribute state in the <code>Graphics2D</code> context.
* The baseline of the
* first character is at position (<i>x</i>, <i>y</i>) in
* the User Space.
* The rendering attributes applied include the <code>Clip</code>,
* <code>Transform</code>, <code>Paint</code>, <code>Font</code> and
* <code>Composite</code> attributes. For characters in script
* systems such as Hebrew and Arabic, the glyphs can be rendered from
* right to left, in which case the coordinate supplied is the
* location of the leftmost character on the baseline.
*
* @param str the string to be rendered
* @param x the x coordinate of the location where the
* <code>String</code> should be rendered
* @param y the y coordinate of the location where the
* <code>String</code> should be rendered
* @throws NullPointerException if <code>str</code> is
* <code>null</code>
* @see java.awt.Graphics#drawBytes
* @see java.awt.Graphics#drawChars
* @since JDK1.0
*/
public void drawString(final String str, final int x, final int y)
{
drawString(str, (float) x, (float) y);
}
/**
* Renders the text of the specified iterator applying its attributes
* in accordance with the specification of the {@link java.awt.font.TextAttribute} class.
* <p/>
* The baseline of the first character is at position
* (<i>x</i>, <i>y</i>) in User Space.
* For characters in script systems such as Hebrew and Arabic,
* the glyphs can be rendered from right to left, in which case the
* coordinate supplied is the location of the leftmost character
* on the baseline.
*
* @param iterator the iterator whose text is to be rendered
* @param x the x coordinate where the iterator's text is to be
* rendered
* @param y the y coordinate where the iterator's text is to be
* rendered
* @throws NullPointerException if <code>iterator</code> is
* <code>null</code>
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #setTransform
* @see #setComposite
* @see #setClip
*/
public void drawString(final AttributedCharacterIterator iterator, final int x, final int y)
{
drawString(iterator, (float) x, (float) y);
}
/**
* Renders the text of the specified
* {@link java.awt.font.GlyphVector} using
* the <code>Graphics2D</code> context's rendering attributes.
* The rendering attributes applied include the <code>Clip</code>,
* <code>Transform</code>, <code>Paint</code>, and
* <code>Composite</code> attributes. The <code>GlyphVector</code>
* specifies individual glyphs from a {@link java.awt.Font}.
* The <code>GlyphVector</code> can also contain the glyph positions.
* This is the fastest way to render a set of characters to the
* screen.
*
* @param g the <code>GlyphVector</code> to be rendered
* @param x the x position in User Space where the glyphs should
* be rendered
* @param y the y position in User Space where the glyphs should
* be rendered
* @throws NullPointerException if <code>g</code> is <code>null</code>.
* @see java.awt.Font#createGlyphVector
* @see java.awt.font.GlyphVector
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #setTransform
* @see #setComposite
* @see #setClip
*/
public void drawGlyphVector(final GlyphVector g, final float x, final float y)
{
final Shape s = g.getOutline(x, y);
fill(s);
}
/**
* Checks whether or not the specified <code>Shape</code> intersects
* the specified {@link java.awt.Rectangle}, which is in device
* space. If <code>onStroke</code> is false, this method checks
* whether or not the interior of the specified <code>Shape</code>
* intersects the specified <code>Rectangle</code>. If
* <code>onStroke</code> is <code>true</code>, this method checks
* whether or not the <code>Stroke</code> of the specified
* <code>Shape</code> outline intersects the specified
* <code>Rectangle</code>.
* The rendering attributes taken into account include the
* <code>Clip</code>, <code>Transform</code>, and <code>Stroke</code>
* attributes.
*
* @param rect the area in device space to check for a hit
* @param s the <code>Shape</code> to check for a hit
* @param onStroke flag used to choose between testing the
* stroked or the filled shape. If the flag is <code>true</code>, the
* <code>Stroke</code> oultine is tested. If the flag is
* <code>false</code>, the filled <code>Shape</code> is tested.
* @return <code>true</code> if there is a hit; <code>false</code>
* otherwise.
* @see #setStroke
* @see #fill
* @see #draw
* @see #transform
* @see #setTransform
* @see #clip
* @see #setClip
*/
public boolean hit(final Rectangle rect, Shape s, final boolean onStroke)
{
if (onStroke)
{
s = getStroke().createStrokedShape(s);
}
s = getTransform().createTransformedShape(s);
final Area area = new Area(s);
final Shape clip = getClip();
if (clip != null)
{
area.intersect(new Area(clip));
}
return area.intersects(rect.x, rect.y, rect.width, rect.height);
}
/**
* Returns the device configuration associated with this
* <code>Graphics2D</code>.
*
* @return the device configuration of this <code>Graphics2D</code>.
*/
public GraphicsConfiguration getDeviceConfiguration()
{
return dg2.getDeviceConfiguration();
}
/**
* Sets the <code>Composite</code> for the <code>Graphics2D</code> context.
* The <code>Composite</code> is used in all drawing methods such as
* <code>drawImage</code>, <code>drawString</code>, <code>draw</code>,
* and <code>fill</code>. It specifies how new pixels are to be combined
* with the existing pixels on the graphics device during the rendering
* process.
* <p>If this <code>Graphics2D</code> context is drawing to a
* <code>Component</code> on the display screen and the
* <code>Composite</code> is a custom object rather than an
* instance of the <code>AlphaComposite</code> class, and if
* there is a security manager, its <code>checkPermission</code>
* method is called with an <code>AWTPermission("readDisplayPixels")</code>
* permission.
*
* @param comp the <code>Composite</code> object to be used for rendering
* @throws SecurityException if a custom <code>Composite</code> object is being
* used to render to the screen and a security manager
* is set and its <code>checkPermission</code> method
* does not allow the operation.
* @see java.awt.Graphics#setXORMode
* @see java.awt.Graphics#setPaintMode
* @see #getComposite
* @see java.awt.AlphaComposite
* @see SecurityManager#checkPermission
* @see java.awt.AWTPermission
*/
public void setComposite(final Composite comp)
{
if (comp instanceof AlphaComposite)
{
final AlphaComposite composite = (AlphaComposite) comp;
if (composite.getRule() == 3)
{
alpha = composite.getAlpha();
this.composite = composite;
if (realPaint != null && (realPaint instanceof Color))
{
final Color c = (Color) realPaint;
paint = new Color(c.getRed(), c.getGreen(), c.getBlue(), (int) ((float) c.getAlpha() * alpha));
}
return;
}
}
this.composite = comp;
alpha = 1.0F;
}
/**
* Sets the <code>Paint</code> attribute for the
* <code>Graphics2D</code> context. Calling this method
* with a <code>null</code> <code>Paint</code> object does
* not have any effect on the current <code>Paint</code> attribute
* of this <code>Graphics2D</code>.
*
* @param paint the <code>Paint</code> object to be used to generate
* color during the rendering process, or <code>null</code>
* @see java.awt.Graphics#setColor
* @see #getPaint
* @see java.awt.GradientPaint
* @see java.awt.TexturePaint
*/
public void setPaint(final Paint paint)
{
if (paint == null)
{
return;
}
this.paint = paint;
realPaint = paint;
if ((composite instanceof AlphaComposite) && (paint instanceof Color))
{
final AlphaComposite co = (AlphaComposite) composite;
if (co.getRule() == 3)
{
final Color c = (Color) paint;
this.paint = new Color(c.getRed(), c.getGreen(), c.getBlue(), (int) ((float) c.getAlpha() * alpha));
realPaint = paint;
}
}
}
/**
* Sets the <code>Stroke</code> for the <code>Graphics2D</code> context.
*
* @param s the <code>Stroke</code> object to be used to stroke a
* <code>Shape</code> during the rendering process
* @see java.awt.BasicStroke
* @see #getStroke
*/
public void setStroke(final Stroke s)
{
dg2.setStroke(s);
}
/**
* Sets the value of a single preference for the rendering algorithms.
* Hint categories include controls for rendering quality and overall
* time/quality trade-off in the rendering process. Refer to the
* <code>RenderingHints</code> class for definitions of some common
* keys and values.
*
* @param hintKey the key of the hint to be set.
* @param hintValue the value indicating preferences for the specified
* hint category.
* @see #getRenderingHint(java.awt.RenderingHints.Key)
* @see java.awt.RenderingHints
*/
public void setRenderingHint(final RenderingHints.Key hintKey, final Object hintValue)
{
dg2.setRenderingHint(hintKey, hintValue);
}
/**
* Returns the value of a single preference for the rendering algorithms.
* Hint categories include controls for rendering quality and overall
* time/quality trade-off in the rendering process. Refer to the
* <code>RenderingHints</code> class for definitions of some common
* keys and values.
*
* @param hintKey the key corresponding to the hint to get.
* @return an object representing the value for the specified hint key.
* Some of the keys and their associated values are defined in the
* <code>RenderingHints</code> class.
* @see java.awt.RenderingHints
* @see #setRenderingHint(java.awt.RenderingHints.Key, Object)
*/
public Object getRenderingHint(final RenderingHints.Key hintKey)
{
return dg2.getRenderingHint(hintKey);
}
/**
* Replaces the values of all preferences for the rendering
* algorithms with the specified <code>hints</code>.
* The existing values for all rendering hints are discarded and
* the new set of known hints and values are initialized from the
* specified {@link java.util.Map} object.
* Hint categories include controls for rendering quality and
* overall time/quality trade-off in the rendering process.
* Refer to the <code>RenderingHints</code> class for definitions of
* some common keys and values.
*
* @param hints the rendering hints to be set
* @see #getRenderingHints
* @see java.awt.RenderingHints
*/
public void setRenderingHints(final Map<?, ?> hints)
{
dg2.setRenderingHints(hints);
}
/**
* Gets the preferences for the rendering algorithms. Hint categories
* include controls for rendering quality and overall time/quality
* trade-off in the rendering process.
* Returns all of the hint key/value pairs that were ever specified in
* one operation. Refer to the
* <code>RenderingHints</code> class for definitions of some common
* keys and values.
*
* @return a reference to an instance of <code>RenderingHints</code>
* that contains the current preferences.
* @see java.awt.RenderingHints
* @see #setRenderingHints(java.util.Map)
*/
public RenderingHints getRenderingHints()
{
return dg2.getRenderingHints();
}
/**
* Translates the origin of the <code>Graphics2D</code> context to the
* point (<i>x</i>, <i>y</i>) in the current coordinate system.
* Modifies the <code>Graphics2D</code> context so that its new origin
* corresponds to the point (<i>x</i>, <i>y</i>) in the
* <code>Graphics2D</code> context's former coordinate system. All
* coordinates used in subsequent rendering operations on this graphics
* context are relative to this new origin.
*
* @param x the specified x coordinate
* @param y the specified y coordinate
* @since JDK1.0
*/
public void translate(final int x, final int y)
{
translate((double) x, (double) y);
}
/**
* Concatenates the current
* <code>Graphics2D</code> <code>Transform</code>
* with a translation transform.
* Subsequent rendering is translated by the specified
* distance relative to the previous position.
* This is equivalent to calling transform(T), where T is an
* <code>AffineTransform</code> represented by the following matrix:
* <pre>
* [ 1 0 tx ]
* [ 0 1 ty ]
* [ 0 0 1 ]
* </pre>
*
* @param tx the distance to translate along the x-axis
* @param ty the distance to translate along the y-axis
*/
public void translate(final double tx, final double ty)
{
dg2.translate(tx, ty);
}
/**
* Concatenates the current <code>Graphics2D</code>
* <code>Transform</code> with a rotation transform.
* Subsequent rendering is rotated by the specified radians relative
* to the previous origin.
* This is equivalent to calling <code>transform(R)</code>, where R is an
* <code>AffineTransform</code> represented by the following matrix:
* <pre>
* [ cos(theta) -sin(theta) 0 ]
* [ sin(theta) cos(theta) 0 ]
* [ 0 0 1 ]
* </pre>
* Rotating with a positive angle theta rotates points on the positive
* x axis toward the positive y axis.
*
* @param theta the angle of rotation in radians
*/
public void rotate(final double theta)
{
dg2.rotate(theta);
}
/**
* Concatenates the current <code>Graphics2D</code>
* <code>Transform</code> with a translated rotation
* transform. Subsequent rendering is transformed by a transform
* which is constructed by translating to the specified location,
* rotating by the specified radians, and translating back by the same
* amount as the original translation. This is equivalent to the
* following sequence of calls:
* <pre>
* translate(x, y);
* rotate(theta);
* translate(-x, -y);
* </pre>
* Rotating with a positive angle theta rotates points on the positive
* x axis toward the positive y axis.
*
* @param theta the angle of rotation in radians
* @param x the x coordinate of the origin of the rotation
* @param y the y coordinate of the origin of the rotation
*/
public void rotate(final double theta, final double x, final double y)
{
dg2.rotate(theta, x, y);
}
/**
* Concatenates the current <code>Graphics2D</code>
* <code>Transform</code> with a scaling transformation
* Subsequent rendering is resized according to the specified scaling
* factors relative to the previous scaling.
* This is equivalent to calling <code>transform(S)</code>, where S is an
* <code>AffineTransform</code> represented by the following matrix:
* <pre>
* [ sx 0 0 ]
* [ 0 sy 0 ]
* [ 0 0 1 ]
* </pre>
*
* @param sx the amount by which X coordinates in subsequent
* rendering operations are multiplied relative to previous
* rendering operations.
* @param sy the amount by which Y coordinates in subsequent
* rendering operations are multiplied relative to previous
* rendering operations.
*/
public void scale(final double sx, final double sy)
{
dg2.scale(sx, sy);
}
/**
* Concatenates the current <code>Graphics2D</code>
* <code>Transform</code> with a shearing transform.
* Subsequent renderings are sheared by the specified
* multiplier relative to the previous position.
* This is equivalent to calling <code>transform(SH)</code>, where SH
* is an <code>AffineTransform</code> represented by the following
* matrix:
* <pre>
* [ 1 shx 0 ]
* [ shy 1 0 ]
* [ 0 0 1 ]
* </pre>
*
* @param shx the multiplier by which coordinates are shifted in
* the positive X axis direction as a function of their Y coordinate
* @param shy the multiplier by which coordinates are shifted in
* the positive Y axis direction as a function of their X coordinate
*/
public void shear(final double shx, final double shy)
{
dg2.shear(shx, shy);
}
/**
* Composes an <code>AffineTransform</code> object with the
* <code>Transform</code> in this <code>Graphics2D</code> according
* to the rule last-specified-first-applied. If the current
* <code>Transform</code> is Cx, the result of composition
* with Tx is a new <code>Transform</code> Cx'. Cx' becomes the
* current <code>Transform</code> for this <code>Graphics2D</code>.
* Transforming a point p by the updated <code>Transform</code> Cx' is
* equivalent to first transforming p by Tx and then transforming
* the result by the original <code>Transform</code> Cx. In other
* words, Cx'(p) = Cx(Tx(p)). A copy of the Tx is made, if necessary,
* so further modifications to Tx do not affect rendering.
*
* @param tx the <code>AffineTransform</code> object to be composed with
* the current <code>Transform</code>
* @see #setTransform
* @see java.awt.geom.AffineTransform
*/
public void transform(final AffineTransform tx)
{
dg2.transform(tx);
}
/**
* Overwrites the Transform in the <code>Graphics2D</code> context.
* WARNING: This method should <b>never</b> be used to apply a new
* coordinate transform on top of an existing transform because the
* <code>Graphics2D</code> might already have a transform that is
* needed for other purposes, such as rendering Swing
* components or applying a scaling transformation to adjust for the
* resolution of a printer.
* <p>To add a coordinate transform, use the
* <code>transform</code>, <code>rotate</code>, <code>scale</code>,
* or <code>shear</code> methods. The <code>setTransform</code>
* method is intended only for restoring the original
* <code>Graphics2D</code> transform after rendering, as shown in this
* example:
* <pre><blockquote>
* // Get the current transform
* AffineTransform saveAT = g2.getTransform();
* // Perform transformation
* g2d.transform(...);
* // Render
* g2d.draw(...);
* // Restore original transform
* g2d.setTransform(saveAT);
* </blockquote></pre>
*
* @param tx the <code>AffineTransform</code> that was retrieved
* from the <code>getTransform</code> method
* @see #transform
* @see #getTransform
* @see java.awt.geom.AffineTransform
*/
public void setTransform(final AffineTransform tx)
{
dg2.setTransform(tx);
}
/**
* Returns a copy of the current <code>Transform</code> in the
* <code>Graphics2D</code> context.
*
* @return the current <code>AffineTransform</code> in the
* <code>Graphics2D</code> context.
* @see #transform
* @see #setTransform
*/
public AffineTransform getTransform()
{
return dg2.getTransform();
}
/**
* Returns the current <code>Paint</code> of the
* <code>Graphics2D</code> context.
*
* @return the current <code>Graphics2D</code> <code>Paint</code>,
* which defines a color or pattern.
* @see #setPaint
* @see java.awt.Graphics#setColor
*/
public Paint getPaint()
{
return paint;
}
public Paint getRealPaint()
{
return realPaint;
}
public float getAlpha()
{
return alpha;
}
/**
* Returns the current <code>Composite</code> in the
* <code>Graphics2D</code> context.
*
* @return the current <code>Graphics2D</code> <code>Composite</code>,
* which defines a compositing style.
* @see #setComposite
*/
public Composite getComposite()
{
return composite;
}
/**
* Sets the background color for the <code>Graphics2D</code> context.
* The background color is used for clearing a region.
* When a <code>Graphics2D</code> is constructed for a
* <code>Component</code>, the background color is
* inherited from the <code>Component</code>. Setting the background color
* in the <code>Graphics2D</code> context only affects the subsequent
* <code>clearRect</code> calls and not the background color of the
* <code>Component</code>. To change the background
* of the <code>Component</code>, use appropriate methods of
* the <code>Component</code>.
*
* @param color the background color that isused in
* subsequent calls to <code>clearRect</code>
* @see #getBackground
* @see java.awt.Graphics#clearRect
*/
public void setBackground(final Color color)
{
this.background = color;
}
/**
* Returns the background color used for clearing a region.
*
* @return the current <code>Graphics2D</code> <code>Color</code>,
* which defines the background color.
* @see #setBackground
*/
public Color getBackground()
{
return background;
}
/**
* Returns the current <code>Stroke</code> in the
* <code>Graphics2D</code> context.
*
* @return the current <code>Graphics2D</code> <code>Stroke</code>,
* which defines the line style.
* @see #setStroke
*/
public Stroke getStroke()
{
return dg2.getStroke();
}
/**
* Intersects the current <code>Clip</code> with the interior of the
* specified <code>Shape</code> and sets the <code>Clip</code> to the
* resulting intersection. The specified <code>Shape</code> is
* transformed with the current <code>Graphics2D</code>
* <code>Transform</code> before being intersected with the current
* <code>Clip</code>. This method is used to make the current
* <code>Clip</code> smaller.
* To make the <code>Clip</code> larger, use <code>setClip</code>.
* The <i>user clip</i> modified by this method is independent of the
* clipping associated with device bounds and visibility. If no clip has
* previously been set, or if the clip has been cleared using
* {@link java.awt.Graphics#setClip(java.awt.Shape) setClip} with a <code>null</code>
* argument, the specified <code>Shape</code> becomes the new
* user clip.
*
* @param s the <code>Shape</code> to be intersected with the current
* <code>Clip</code>. If <code>s</code> is <code>null</code>,
* this method clears the current <code>Clip</code>.
*/
public void clip(Shape s)
{
dg2.clip(s);
}
/**
* Get the rendering context of the <code>Font</code> within this
* <code>Graphics2D</code> context.
* The {@link java.awt.font.FontRenderContext}
* encapsulates application hints such as anti-aliasing and
* fractional metrics, as well as target device specific information
* such as dots-per-inch. This information should be provided by the
* application when using objects that perform typographical
* formatting, such as <code>Font</code> and
* <code>TextLayout</code>. This information should also be provided
* by applications that perform their own layout and need accurate
* measurements of various characteristics of glyphs such as advance
* and line height when various rendering hints have been applied to
* the text rendering.
*
* @return a reference to an instance of FontRenderContext.
* @see java.awt.font.FontRenderContext
* @see java.awt.Font#createGlyphVector
* @see java.awt.font.TextLayout
* @since 1.2
*/
public FontRenderContext getFontRenderContext()
{
final boolean antialias = RenderingHints.VALUE_TEXT_ANTIALIAS_ON.equals(getRenderingHint(
RenderingHints.KEY_TEXT_ANTIALIASING));
final boolean fractions = RenderingHints.VALUE_FRACTIONALMETRICS_ON.equals(getRenderingHint(
RenderingHints.KEY_FRACTIONALMETRICS));
return new FontRenderContext(new AffineTransform(), antialias, fractions);
}
/**
* Creates a new <code>Graphics</code> object that is
* a copy of this <code>Graphics</code> object.
*
* @return a new graphics context that is a copy of
* this graphics context.
*/
public Graphics create()
{
final AbstractGraphics2D clone = clone();
clone.parent = this;
childs.add(clone);
return clone;
}
public AbstractGraphics2D clone ()
{
try
{
final AbstractGraphics2D clone = (AbstractGraphics2D) super.clone();
clone.dg2 = (Graphics2D) dg2.create();
clone.childs = (ArrayList<AbstractGraphics2D>) childs.clone();
clone.childs.clear();
return clone;
}
catch (CloneNotSupportedException cne)
{
throw new IllegalStateException();
}
}
/**
* Gets this graphics context's current color.
*
* @return this graphics context's current color.
* @see java.awt.Color
* @see java.awt.Graphics#setColor(java.awt.Color)
*/
public Color getColor()
{
if (paint instanceof Color)
{
return (Color) paint;
}
else
{
return Color.black;
}
}
/**
* Sets this graphics context's current color to the specified
* color. All subsequent graphics operations using this graphics
* context use this specified color.
*
* @param c the new rendering color.
* @see java.awt.Color
* @see java.awt.Graphics#getColor
*/
public void setColor(final Color c)
{
setPaint(c);
}
/**
* Sets the paint mode of this graphics context to overwrite the
* destination with this graphics context's current color.
* This sets the logical pixel operation function to the paint or
* overwrite mode. All subsequent rendering operations will
* overwrite the destination with the current color.
*/
public void setPaintMode()
{
}
/**
* Sets the paint mode of this graphics context to alternate between
* this graphics context's current color and the new specified color.
* This specifies that logical pixel operations are performed in the
* XOR mode, which alternates pixels between the current color and
* a specified XOR color.
* <p/>
* When drawing operations are performed, pixels which are the
* current color are changed to the specified color, and vice versa.
* <p/>
* Pixels that are of colors other than those two colors are changed
* in an unpredictable but reversible manner; if the same figure is
* drawn twice, then all pixels are restored to their original values.
*
* @param c1 the XOR alternation color
*/
public void setXORMode(final Color c1)
{
}
/**
* Gets the current font.
*
* @return this graphics context's current font.
* @see java.awt.Font
* @see java.awt.Graphics#setFont(java.awt.Font)
*/
public Font getFont()
{
return dg2.getFont();
}
/**
* Sets this graphics context's font to the specified font.
* All subsequent text operations using this graphics context
* use this font. A null argument is silently ignored.
*
* @param font the font.
* @see java.awt.Graphics#getFont
* @see java.awt.Graphics#drawString(String, int, int)
* @see java.awt.Graphics#drawBytes(byte[], int, int, int, int)
* @see java.awt.Graphics#drawChars(char[], int, int, int, int)
*/
public void setFont(final Font font)
{
if (font == null)
{
return;
}
this.dg2.setFont(font);
}
/**
* Gets the font metrics for the specified font.
*
* @param f the specified font
* @return the font metrics for the specified font.
* @see java.awt.Graphics#getFont
* @see java.awt.FontMetrics
* @see java.awt.Graphics#getFontMetrics()
*/
public FontMetrics getFontMetrics(final Font f)
{
final Font font = f.deriveFont(getTransform());
return new TestFontMetrics(font);
}
/**
* Returns the bounding rectangle of the current clipping area.
* This method refers to the user clip, which is independent of the
* clipping associated with device bounds and window visibility.
* If no clip has previously been set, or if the clip has been
* cleared using <code>setClip(null)</code>, this method returns
* <code>null</code>.
* The coordinates in the rectangle are relative to the coordinate
* system origin of this graphics context.
*
* @return the bounding rectangle of the current clipping area,
* or <code>null</code> if no clip is set.
* @see java.awt.Graphics#getClip
* @see java.awt.Graphics#clipRect
* @see java.awt.Graphics#setClip(int, int, int, int)
* @see java.awt.Graphics#setClip(java.awt.Shape)
* @since JDK1.1
*/
public Rectangle getClipBounds()
{
Shape clip1 = getClip();
if (clip1 == null)
{
return null;
}
return clip1.getBounds();
}
/**
* Intersects the current clip with the specified rectangle.
* The resulting clipping area is the intersection of the current
* clipping area and the specified rectangle. If there is no
* current clipping area, either because the clip has never been
* set, or the clip has been cleared using <code>setClip(null)</code>,
* the specified rectangle becomes the new clip.
* This method sets the user clip, which is independent of the
* clipping associated with device bounds and window visibility.
* This method can only be used to make the current clip smaller.
* To set the current clip larger, use any of the setClip methods.
* Rendering operations have no effect outside of the clipping area.
*
* @param x the x coordinate of the rectangle to intersect the clip with
* @param y the y coordinate of the rectangle to intersect the clip with
* @param width the width of the rectangle to intersect the clip with
* @param height the height of the rectangle to intersect the clip with
* @see #setClip(int, int, int, int)
* @see #setClip(java.awt.Shape)
*/
public void clipRect(final int x, final int y, final int width, final int height)
{
final Rectangle2D rect = new Rectangle2D.Double(x, y, width, height);
clip(rect);
}
/**
* Sets the current clip to the rectangle specified by the given
* coordinates. This method sets the user clip, which is
* independent of the clipping associated with device bounds
* and window visibility.
* Rendering operations have no effect outside of the clipping area.
*
* @param x the <i>x</i> coordinate of the new clip rectangle.
* @param y the <i>y</i> coordinate of the new clip rectangle.
* @param width the width of the new clip rectangle.
* @param height the height of the new clip rectangle.
* @see java.awt.Graphics#clipRect
* @see java.awt.Graphics#setClip(java.awt.Shape)
* @see java.awt.Graphics#getClip
* @since JDK1.1
*/
public void setClip(final int x, final int y, final int width, final int height)
{
final Rectangle2D rect = new Rectangle2D.Double(x, y, width, height);
setClip(rect);
}
/**
* Gets the current clipping area.
* This method returns the user clip, which is independent of the
* clipping associated with device bounds and window visibility.
* If no clip has previously been set, or if the clip has been
* cleared using <code>setClip(null)</code>, this method returns
* <code>null</code>.
*
* @return a <code>Shape</code> object representing the
* current clipping area, or <code>null</code> if
* no clip is set.
* @see java.awt.Graphics#getClipBounds
* @see java.awt.Graphics#clipRect
* @see java.awt.Graphics#setClip(int, int, int, int)
* @see java.awt.Graphics#setClip(java.awt.Shape)
* @since JDK1.1
*/
public Shape getClip()
{
return dg2.getClip();
}
/**
* Sets the current clipping area to an arbitrary clip shape.
* Not all objects that implement the <code>Shape</code>
* interface can be used to set the clip. The only
* <code>Shape</code> objects that are guaranteed to be
* supported are <code>Shape</code> objects that are
* obtained via the <code>getClip</code> method and via
* <code>Rectangle</code> objects. This method sets the
* user clip, which is independent of the clipping associated
* with device bounds and window visibility.
*
* @param clip the <code>Shape</code> to use to set the clip
* @see java.awt.Graphics#getClip()
* @see java.awt.Graphics#clipRect
* @see java.awt.Graphics#setClip(int, int, int, int)
* @since JDK1.1
*/
public void setClip(final Shape clip)
{
dg2.setClip(clip);
}
/**
* Copies an area of the component by a distance specified by
* <code>dx</code> and <code>dy</code>. From the point specified
* by <code>x</code> and <code>y</code>, this method
* copies downwards and to the right. To copy an area of the
* component to the left or upwards, specify a negative value for
* <code>dx</code> or <code>dy</code>.
* If a portion of the source rectangle lies outside the bounds
* of the component, or is obscured by another window or component,
* <code>copyArea</code> will be unable to copy the associated
* pixels. The area that is omitted can be refreshed by calling
* the component's <code>paint</code> method.
*
* @param x the <i>x</i> coordinate of the source rectangle.
* @param y the <i>y</i> coordinate of the source rectangle.
* @param width the width of the source rectangle.
* @param height the height of the source rectangle.
* @param dx the horizontal distance to copy the pixels.
* @param dy the vertical distance to copy the pixels.
*/
public void copyArea(final int x, final int y, final int width, final int height, final int dx, final int dy)
{
}
/**
* Draws a line, using the current color, between the points
* <code>(x1, y1)</code> and <code>(x2, y2)</code>
* in this graphics context's coordinate system.
*
* @param x1 the first point's <i>x</i> coordinate.
* @param y1 the first point's <i>y</i> coordinate.
* @param x2 the second point's <i>x</i> coordinate.
* @param y2 the second point's <i>y</i> coordinate.
*/
public void drawLine(final int x1, final int y1, final int x2, final int y2)
{
final Line2D line = new Line2D.Double((double) x1, (double) y1, (double) x2, (double) y2);
draw(line);
}
/**
* Fills the specified rectangle.
* The left and right edges of the rectangle are at
* <code>x</code> and <code>x + width - 1</code>.
* The top and bottom edges are at
* <code>y</code> and <code>y + height - 1</code>.
* The resulting rectangle covers an area
* <code>width</code> pixels wide by
* <code>height</code> pixels tall.
* The rectangle is filled using the graphics context's current color.
*
* @param x the <i>x</i> coordinate
* of the rectangle to be filled.
* @param y the <i>y</i> coordinate
* of the rectangle to be filled.
* @param width the width of the rectangle to be filled.
* @param height the height of the rectangle to be filled.
* @see java.awt.Graphics#clearRect
* @see java.awt.Graphics#drawRect
*/
public void fillRect(final int x, final int y, final int width, final int height)
{
fill(new Rectangle(x, y, width, height));
}
/**
* Clears the specified rectangle by filling it with the background
* color of the current drawing surface. This operation does not
* use the current paint mode.
* <p/>
* Beginning with Java 1.1, the background color
* of offscreen images may be system dependent. Applications should
* use <code>setColor</code> followed by <code>fillRect</code> to
* ensure that an offscreen image is cleared to a specific color.
*
* @param x the <i>x</i> coordinate of the rectangle to clear.
* @param y the <i>y</i> coordinate of the rectangle to clear.
* @param width the width of the rectangle to clear.
* @param height the height of the rectangle to clear.
* @see java.awt.Graphics#fillRect(int, int, int, int)
* @see java.awt.Graphics#drawRect
* @see java.awt.Graphics#setColor(java.awt.Color)
* @see java.awt.Graphics#setPaintMode
* @see java.awt.Graphics#setXORMode(java.awt.Color)
*/
public void clearRect(final int x, final int y, final int width, final int height)
{
final Paint temp = paint;
setPaint(background);
fillRect(x, y, width, height);
setPaint(temp);
}
/**
* Draws an outlined round-cornered rectangle using this graphics
* context's current color. The left and right edges of the rectangle
* are at <code>x</code> and <code>x + width</code>,
* respectively. The top and bottom edges of the rectangle are at
* <code>y</code> and <code>y + height</code>.
*
* @param x the <i>x</i> coordinate of the rectangle to be drawn.
* @param y the <i>y</i> coordinate of the rectangle to be drawn.
* @param width the width of the rectangle to be drawn.
* @param height the height of the rectangle to be drawn.
* @param arcWidth the horizontal diameter of the arc
* at the four corners.
* @param arcHeight the vertical diameter of the arc
* at the four corners.
* @see java.awt.Graphics#fillRoundRect
*/
public void drawRoundRect(final int x,
final int y,
final int width,
final int height,
final int arcWidth,
final int arcHeight)
{
final RoundRectangle2D rect = new RoundRectangle2D.Double(x, y, width, height, arcWidth, arcHeight);
draw(rect);
}
/**
* Fills the specified rounded corner rectangle with the current color.
* The left and right edges of the rectangle
* are at <code>x</code> and <code>x + width - 1</code>,
* respectively. The top and bottom edges of the rectangle are at
* <code>y</code> and <code>y + height - 1</code>.
*
* @param x the <i>x</i> coordinate of the rectangle to be filled.
* @param y the <i>y</i> coordinate of the rectangle to be filled.
* @param width the width of the rectangle to be filled.
* @param height the height of the rectangle to be filled.
* @param arcWidth the horizontal diameter
* of the arc at the four corners.
* @param arcHeight the vertical diameter
* of the arc at the four corners.
* @see java.awt.Graphics#drawRoundRect
*/
public void fillRoundRect(final int x,
final int y,
final int width,
final int height,
final int arcWidth,
final int arcHeight)
{
final RoundRectangle2D rect = new RoundRectangle2D.Double(x, y, width, height, arcWidth, arcHeight);
fill(rect);
}
/**
* Draws the outline of an oval.
* The result is a circle or ellipse that fits within the
* rectangle specified by the <code>x</code>, <code>y</code>,
* <code>width</code>, and <code>height</code> arguments.
* <p/>
* The oval covers an area that is
* <code>width + 1</code> pixels wide
* and <code>height + 1</code> pixels tall.
*
* @param x the <i>x</i> coordinate of the upper left
* corner of the oval to be drawn.
* @param y the <i>y</i> coordinate of the upper left
* corner of the oval to be drawn.
* @param width the width of the oval to be drawn.
* @param height the height of the oval to be drawn.
* @see java.awt.Graphics#fillOval
*/
public void drawOval(final int x, final int y, final int width, final int height)
{
final Ellipse2D oval = new Ellipse2D.Float((float) x, (float) y, (float) width, (float) height);
draw(oval);
}
/**
* Fills an oval bounded by the specified rectangle with the
* current color.
*
* @param x the <i>x</i> coordinate of the upper left corner
* of the oval to be filled.
* @param y the <i>y</i> coordinate of the upper left corner
* of the oval to be filled.
* @param width the width of the oval to be filled.
* @param height the height of the oval to be filled.
* @see java.awt.Graphics#drawOval
*/
public void fillOval(final int x, final int y, final int width, final int height)
{
final Ellipse2D oval = new Ellipse2D.Float((float) x, (float) y, (float) width, (float) height);
fill(oval);
}
/**
* Draws the outline of a circular or elliptical arc
* covering the specified rectangle.
* <p/>
* The resulting arc begins at <code>startAngle</code> and extends
* for <code>arcAngle</code> degrees, using the current color.
* Angles are interpreted such that 0 degrees
* is at the 3 o'clock position.
* A positive value indicates a counter-clockwise rotation
* while a negative value indicates a clockwise rotation.
* <p/>
* The center of the arc is the center of the rectangle whose origin
* is (<i>x</i>, <i>y</i>) and whose size is specified by the
* <code>width</code> and <code>height</code> arguments.
* <p/>
* The resulting arc covers an area
* <code>width + 1</code> pixels wide
* by <code>height + 1</code> pixels tall.
* <p/>
* The angles are specified relative to the non-square extents of
* the bounding rectangle such that 45 degrees always falls on the
* line from the center of the ellipse to the upper right corner of
* the bounding rectangle. As a result, if the bounding rectangle is
* noticeably longer in one axis than the other, the angles to the
* start and end of the arc segment will be skewed farther along the
* longer axis of the bounds.
*
* @param x the <i>x</i> coordinate of the
* upper-left corner of the arc to be drawn.
* @param y the <i>y</i> coordinate of the
* upper-left corner of the arc to be drawn.
* @param width the width of the arc to be drawn.
* @param height the height of the arc to be drawn.
* @param startAngle the beginning angle.
* @param arcAngle the angular extent of the arc,
* relative to the start angle.
* @see java.awt.Graphics#fillArc
*/
public void drawArc(final int x,
final int y,
final int width,
final int height,
final int startAngle,
final int arcAngle)
{
final Arc2D arc = new Arc2D.Double(x, y, width, height, startAngle, arcAngle, Arc2D.OPEN);
draw(arc);
}
/**
* Fills a circular or elliptical arc covering the specified rectangle.
* <p/>
* The resulting arc begins at <code>startAngle</code> and extends
* for <code>arcAngle</code> degrees.
* Angles are interpreted such that 0 degrees
* is at the 3 o'clock position.
* A positive value indicates a counter-clockwise rotation
* while a negative value indicates a clockwise rotation.
* <p/>
* The center of the arc is the center of the rectangle whose origin
* is (<i>x</i>, <i>y</i>) and whose size is specified by the
* <code>width</code> and <code>height</code> arguments.
* <p/>
* The resulting arc covers an area
* <code>width + 1</code> pixels wide
* by <code>height + 1</code> pixels tall.
* <p/>
* The angles are specified relative to the non-square extents of
* the bounding rectangle such that 45 degrees always falls on the
* line from the center of the ellipse to the upper right corner of
* the bounding rectangle. As a result, if the bounding rectangle is
* noticeably longer in one axis than the other, the angles to the
* start and end of the arc segment will be skewed farther along the
* longer axis of the bounds.
*
* @param x the <i>x</i> coordinate of the
* upper-left corner of the arc to be filled.
* @param y the <i>y</i> coordinate of the
* upper-left corner of the arc to be filled.
* @param width the width of the arc to be filled.
* @param height the height of the arc to be filled.
* @param startAngle the beginning angle.
* @param arcAngle the angular extent of the arc,
* relative to the start angle.
* @see java.awt.Graphics#drawArc
*/
public void fillArc(final int x,
final int y,
final int width,
final int height,
final int startAngle,
final int arcAngle)
{
final Arc2D arc = new Arc2D.Double(x, y, width, height, startAngle, arcAngle, Arc2D.OPEN);
fill(arc);
}
/**
* Draws a sequence of connected lines defined by
* arrays of <i>x</i> and <i>y</i> coordinates.
* Each pair of (<i>x</i>, <i>y</i>) coordinates defines a point.
* The figure is not closed if the first point
* differs from the last point.
*
* @param x an array of <i>x</i> points
* @param y an array of <i>y</i> points
* @param nPoints the total number of points
* @see java.awt.Graphics#drawPolygon(int[], int[], int)
* @since JDK1.1
*/
public void drawPolyline(final int[] x, final int[] y, final int nPoints)
{
final Line2D line = new Line2D.Double(x[0], y[0], x[0], y[0]);
for (int i = 1; i < nPoints; i++)
{
line.setLine(line.getX2(), line.getY2(), x[i], y[i]);
draw(line);
}
}
/**
* Draws a closed polygon defined by
* arrays of <i>x</i> and <i>y</i> coordinates.
* Each pair of (<i>x</i>, <i>y</i>) coordinates defines a point.
* <p/>
* This method draws the polygon defined by <code>nPoint</code> line
* segments, where the first <code>nPoint - 1</code>
* line segments are line segments from
* <code>(xPoints[i - 1], yPoints[i - 1])</code>
* to <code>(xPoints[i], yPoints[i])</code>, for
* 1 ≤ <i>i</i> ≤ <code>nPoints</code>.
* The figure is automatically closed by drawing a line connecting
* the final point to the first point, if those points are different.
*
* @param xPoints a an array of <code>x</code> coordinates.
* @param yPoints a an array of <code>y</code> coordinates.
* @param nPoints a the total number of points.
* @see java.awt.Graphics#fillPolygon
* @see java.awt.Graphics#drawPolyline
*/
public void drawPolygon(final int[] xPoints, final int[] yPoints, final int nPoints)
{
final Polygon poly = new Polygon();
for (int i = 0; i < nPoints; i++)
{
poly.addPoint(xPoints[i], yPoints[i]);
}
draw(poly);
}
/**
* Fills a closed polygon defined by
* arrays of <i>x</i> and <i>y</i> coordinates.
* <p/>
* This method draws the polygon defined by <code>nPoint</code> line
* segments, where the first <code>nPoint - 1</code>
* line segments are line segments from
* <code>(xPoints[i - 1], yPoints[i - 1])</code>
* to <code>(xPoints[i], yPoints[i])</code>, for
* 1 ≤ <i>i</i> ≤ <code>nPoints</code>.
* The figure is automatically closed by drawing a line connecting
* the final point to the first point, if those points are different.
* <p/>
* The area inside the polygon is defined using an
* even-odd fill rule, also known as the alternating rule.
*
* @param xPoints a an array of <code>x</code> coordinates.
* @param yPoints a an array of <code>y</code> coordinates.
* @param nPoints a the total number of points.
* @see java.awt.Graphics#drawPolygon(int[], int[], int)
*/
public void fillPolygon(final int[] xPoints, final int[] yPoints, final int nPoints)
{
final Polygon poly = new Polygon();
for (int i = 0; i < nPoints; i++)
{
poly.addPoint(xPoints[i], yPoints[i]);
}
fill(poly);
}
/**
* Draws as much of the specified image as is currently available.
* The image is drawn with its top-left corner at
* (<i>x</i>, <i>y</i>) in this graphics context's coordinate
* space. Transparent pixels in the image do not affect whatever
* pixels are already there.
* <p/>
* This method returns immediately in all cases, even if the
* complete image has not yet been loaded, and it has not been dithered
* and converted for the current output device.
* <p/>
* If the image has completely loaded and its pixels are
* no longer being changed, then
* <code>drawImage</code> returns <code>true</code>.
* Otherwise, <code>drawImage</code> returns <code>false</code>
* and as more of
* the image becomes available
* or it is time to draw another frame of animation,
* the process that loads the image notifies
* the specified image observer.
*
* @param img the specified image to be drawn. This method does
* nothing if <code>img</code> is null.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @param observer object to be notified as more of
* the image is converted.
* @return <code>false</code> if the image pixels are still changing;
* <code>true</code> otherwise.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
*/
public boolean drawImage(final Image img, final int x, final int y, final ImageObserver observer)
{
return drawImage(img, x, y, null, observer);
}
/**
* Draws as much of the specified image as has already been scaled
* to fit inside the specified rectangle.
* <p/>
* The image is drawn inside the specified rectangle of this
* graphics context's coordinate space, and is scaled if
* necessary. Transparent pixels do not affect whatever pixels
* are already there.
* <p/>
* This method returns immediately in all cases, even if the
* entire image has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete, then
* <code>drawImage</code> returns <code>false</code>. As more of
* the image becomes available, the process that loads the image notifies
* the image observer by calling its <code>imageUpdate</code> method.
* <p/>
* A scaled version of an image will not necessarily be
* available immediately just because an unscaled version of the
* image has been constructed for this output device. Each size of
* the image may be cached separately and generated from the original
* data in a separate image production sequence.
*
* @param img the specified image to be drawn. This method does
* nothing if <code>img</code> is null.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @param width the width of the rectangle.
* @param height the height of the rectangle.
* @param observer object to be notified as more of
* the image is converted.
* @return <code>false</code> if the image pixels are still changing;
* <code>true</code> otherwise.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
*/
public boolean drawImage(final Image img,
final int x,
final int y,
final int width,
final int height,
final ImageObserver observer)
{
return drawImage(img, x, y, width, height, null, observer);
}
/**
* Draws as much of the specified image as is currently available.
* The image is drawn with its top-left corner at
* (<i>x</i>, <i>y</i>) in this graphics context's coordinate
* space. Transparent pixels are drawn in the specified
* background color.
* <p/>
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
* <p/>
* This method returns immediately in all cases, even if the
* complete image has not yet been loaded, and it has not been dithered
* and converted for the current output device.
* <p/>
* If the image has completely loaded and its pixels are
* no longer being changed, then
* <code>drawImage</code> returns <code>true</code>.
* Otherwise, <code>drawImage</code> returns <code>false</code>
* and as more of
* the image becomes available
* or it is time to draw another frame of animation,
* the process that loads the image notifies
* the specified image observer.
*
* @param img the specified image to be drawn. This method does
* nothing if <code>img</code> is null.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* @param observer object to be notified as more of
* the image is converted.
* @return <code>false</code> if the image pixels are still changing;
* <code>true</code> otherwise.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
*/
public boolean drawImage(final Image img, final int x, final int y, final Color bgcolor, final ImageObserver observer)
{
return drawImage(img, x, y, img.getWidth(observer), img.getHeight(observer), bgcolor, observer);
}
/**
* Draws as much of the specified image as has already been scaled
* to fit inside the specified rectangle.
* <p/>
* The image is drawn inside the specified rectangle of this
* graphics context's coordinate space, and is scaled if
* necessary. Transparent pixels are drawn in the specified
* background color.
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
* <p/>
* This method returns immediately in all cases, even if the
* entire image has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
* <code>drawImage</code> returns <code>false</code>. As more of
* the image becomes available, the process that loads the image notifies
* the specified image observer.
* <p/>
* A scaled version of an image will not necessarily be
* available immediately just because an unscaled version of the
* image has been constructed for this output device. Each size of
* the image may be cached separately and generated from the original
* data in a separate image production sequence.
*
* @param img the specified image to be drawn. This method does
* nothing if <code>img</code> is null.
* @param x the <i>x</i> coordinate.
* @param y the <i>y</i> coordinate.
* @param width the width of the rectangle.
* @param height the height of the rectangle.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* @param observer object to be notified as more of
* the image is converted.
* @return <code>false</code> if the image pixels are still changing;
* <code>true</code> otherwise.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
*/
public boolean drawImage(final Image img,
final int x,
final int y,
final int width,
final int height,
final Color bgcolor,
final ImageObserver observer)
{
waitForImage(img);
final double scalex = width / (double) img.getWidth(observer);
final double scaley = height / (double) img.getHeight(observer);
final AffineTransform tx = AffineTransform.getTranslateInstance(x, y);
tx.scale(scalex, scaley);
return drawImage(img, null, tx, bgcolor, observer);
}
protected void waitForImage(final Image image)
{
if (mediaTracker == null)
{
mediaTracker = new MediaTracker(new FakeComponent());
}
mediaTracker.addImage(image, 0);
try
{
mediaTracker.waitForID(0);
}
catch (InterruptedException e)
{
// empty on purpose
}
mediaTracker.removeImage(image);
}
/**
* Draws as much of the specified area of the specified image as is
* currently available, scaling it on the fly to fit inside the
* specified area of the destination drawable surface. Transparent pixels
* do not affect whatever pixels are already there.
* <p/>
* This method returns immediately in all cases, even if the
* image area to be drawn has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
* <code>drawImage</code> returns <code>false</code>. As more of
* the image becomes available, the process that loads the image notifies
* the specified image observer.
* <p/>
* This method always uses the unscaled version of the image
* to render the scaled rectangle and performs the required
* scaling on the fly. It does not use a cached, scaled version
* of the image for this operation. Scaling of the image from source
* to destination is performed such that the first coordinate
* of the source rectangle is mapped to the first coordinate of
* the destination rectangle, and the second source coordinate is
* mapped to the second destination coordinate. The subimage is
* scaled and flipped as needed to preserve those mappings.
*
* @param img the specified image to be drawn. This method does
* nothing if <code>img</code> is null.
* @param dx1 the <i>x</i> coordinate of the first corner of the
* destination rectangle.
* @param dy1 the <i>y</i> coordinate of the first corner of the
* destination rectangle.
* @param dx2 the <i>x</i> coordinate of the second corner of the
* destination rectangle.
* @param dy2 the <i>y</i> coordinate of the second corner of the
* destination rectangle.
* @param sx1 the <i>x</i> coordinate of the first corner of the
* source rectangle.
* @param sy1 the <i>y</i> coordinate of the first corner of the
* source rectangle.
* @param sx2 the <i>x</i> coordinate of the second corner of the
* source rectangle.
* @param sy2 the <i>y</i> coordinate of the second corner of the
* source rectangle.
* @param observer object to be notified as more of the image is
* scaled and converted.
* @return <code>false</code> if the image pixels are still changing;
* <code>true</code> otherwise.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.1
*/
public boolean drawImage(final Image img,
final int dx1,
final int dy1,
final int dx2,
final int dy2,
final int sx1,
final int sy1,
final int sx2,
final int sy2,
final ImageObserver observer)
{
return drawImage(img, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, null, observer);
}
/**
* Draws as much of the specified area of the specified image as is
* currently available, scaling it on the fly to fit inside the
* specified area of the destination drawable surface.
* <p/>
* Transparent pixels are drawn in the specified background color.
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
* <p/>
* This method returns immediately in all cases, even if the
* image area to be drawn has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
* <code>drawImage</code> returns <code>false</code>. As more of
* the image becomes available, the process that loads the image notifies
* the specified image observer.
* <p/>
* This method always uses the unscaled version of the image
* to render the scaled rectangle and performs the required
* scaling on the fly. It does not use a cached, scaled version
* of the image for this operation. Scaling of the image from source
* to destination is performed such that the first coordinate
* of the source rectangle is mapped to the first coordinate of
* the destination rectangle, and the second source coordinate is
* mapped to the second destination coordinate. The subimage is
* scaled and flipped as needed to preserve those mappings.
*
* @param img the specified image to be drawn. This method does
* nothing if <code>img</code> is null.
* @param dx1 the <i>x</i> coordinate of the first corner of the
* destination rectangle.
* @param dy1 the <i>y</i> coordinate of the first corner of the
* destination rectangle.
* @param dx2 the <i>x</i> coordinate of the second corner of the
* destination rectangle.
* @param dy2 the <i>y</i> coordinate of the second corner of the
* destination rectangle.
* @param sx1 the <i>x</i> coordinate of the first corner of the
* source rectangle.
* @param sy1 the <i>y</i> coordinate of the first corner of the
* source rectangle.
* @param sx2 the <i>x</i> coordinate of the second corner of the
* source rectangle.
* @param sy2 the <i>y</i> coordinate of the second corner of the
* source rectangle.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* @param observer object to be notified as more of the image is
* scaled and converted.
* @return <code>false</code> if the image pixels are still changing;
* <code>true</code> otherwise.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.1
*/
public boolean drawImage(final Image img,
final int dx1,
final int dy1,
final int dx2,
final int dy2,
final int sx1,
final int sy1,
final int sx2,
final int sy2,
final Color bgcolor,
final ImageObserver observer)
{
waitForImage(img);
final double dwidth = (double) dx2 - dx1;
final double dheight = (double) dy2 - dy1;
final double swidth = (double) sx2 - sx1;
final double sheight = (double) sy2 - sy1;
//if either width or height is 0, then there is nothing to draw
if (dwidth == 0 || dheight == 0 || swidth == 0 || sheight == 0)
{
return true;
}
final double scalex = dwidth / swidth;
final double scaley = dheight / sheight;
final double transx = sx1 * scalex;
final double transy = sy1 * scaley;
final AffineTransform tx = AffineTransform.getTranslateInstance(dx1 - transx, dy1 - transy);
tx.scale(scalex, scaley);
final BufferedImage mask = new BufferedImage(img.getWidth(observer), img.getHeight(observer),
BufferedImage.TYPE_BYTE_BINARY);
final Graphics g = mask.getGraphics();
g.fillRect(sx1, sy1, (int) swidth, (int) sheight);
drawImage(img, mask, tx, null, observer);
g.dispose();
return true;
}
protected abstract boolean drawImage(final Image img,
final Image mask,
final AffineTransform xform,
final Color bgColor,
final ImageObserver obs);
/**
* Disposes of this graphics context and releases
* any system resources that it is using.
* A <code>Graphics</code> object cannot be used after
* <code>dispose</code>has been called.
* <p/>
* When a Java program runs, a large number of <code>Graphics</code>
* objects can be created within a short time frame.
* Although the finalization process of the garbage collector
* also disposes of the same system resources, it is preferable
* to manually free the associated resources by calling this
* method rather than to rely on a finalization process which
* may not run to completion for a long period of time.
* <p/>
* Graphics objects which are provided as arguments to the
* <code>paint</code> and <code>update</code> methods
* of components are automatically released by the system when
* those methods return. For efficiency, programmers should
* call <code>dispose</code> when finished using
* a <code>Graphics</code> object only if it was created
* directly from a component or another <code>Graphics</code> object.
*
* @see java.awt.Graphics#finalize
* @see java.awt.Component#paint
* @see java.awt.Component#update
* @see java.awt.Component#getGraphics
* @see java.awt.Graphics#create
*/
public void dispose()
{
for (int i = 0; i < childs.size(); i++)
{
final AbstractGraphics2D graphics2D = childs.get(i);
graphics2D.dispose();
}
if (parent != null)
{
parent.childs.remove(this);
parent = null;
}
}
private static class FakeComponent extends Component
{
private FakeComponent()
{
}
private static final long serialVersionUID = 6450197945596086638L;
}
}