Class AbstractGraphics2D
- All Implemented Interfaces:
Cloneable
- Direct Known Subclasses:
DefaultGraphics2D
,PSGraphics2D
- Version:
- $Id$
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected GraphicContext
Current state of the Graphic Context.protected boolean
Protection agains infinite recursionprotected boolean
Text handling strategy. -
Constructor Summary
ConstructorsConstructorDescriptionAbstractGraphics2D
(boolean textAsShapes) Creates a new AbstractGraphics2D from an existing instance. -
Method Summary
Modifier and TypeMethodDescriptionvoid
addRenderingHints
(Map hints) Sets the values of an arbitrary number of preferences for the rendering algorithms.void
clearRect
(int x, int y, int width, int height) Clears the specified rectangle by filling it with the background color of the current drawing surface.void
Intersects the currentClip
with the interior of the specifiedShape
and sets theClip
to the resulting intersection.void
clipRect
(int x, int y, int width, int height) Intersects the current clip with the specified rectangle.void
drawArc
(int x, int y, int width, int height, int startAngle, int arcAngle) Draws the outline of a circular or elliptical arc covering the specified rectangle.void
drawGlyphVector
(GlyphVector g, float x, float y) Renders the text of the specifiedGlyphVector
using theGraphics2D
context's rendering attributes.void
drawImage
(BufferedImage img, BufferedImageOp op, int x, int y) Renders aBufferedImage
that is filtered with aBufferedImageOp
.boolean
drawImage
(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver 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.boolean
drawImage
(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver 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.boolean
drawImage
(Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer) Draws as much of the specified image as has already been scaled to fit inside the specified rectangle.boolean
drawImage
(Image img, int x, int y, Color bgcolor, ImageObserver observer) Draws as much of the specified image as is currently available.boolean
drawImage
(Image img, AffineTransform xform, ImageObserver obs) Renders an image, applying a transform from image space into user space before drawing.void
drawLine
(int x1, int y1, int x2, int y2) Draws a line, using the current color, between the points(x1, y1)
and(x2, y2)
in this graphics context's coordinate system.void
drawOval
(int x, int y, int width, int height) Draws the outline of an oval.void
drawPolygon
(int[] xPoints, int[] yPoints, int nPoints) Draws a closed polygon defined by arrays of x and y coordinates.void
drawPolyline
(int[] xPoints, int[] yPoints, int nPoints) Draws a sequence of connected lines defined by arrays of x and y coordinates.void
drawRect
(int x, int y, int width, int height) void
drawRoundRect
(int x, int y, int width, int height, int arcWidth, int arcHeight) Draws an outlined round-cornered rectangle using this graphics context's current color.void
drawString
(String str, int x, int y) Draws the text given by the specified string, using this graphics context's current font and color.void
drawString
(AttributedCharacterIterator iterator, float x, float y) Generic implementation for drawing attributed strings using TextLayout.void
drawString
(AttributedCharacterIterator iterator, int x, int y) Draws the text given by the specified iterator, using this graphics context's current color.void
fillArc
(int x, int y, int width, int height, int startAngle, int arcAngle) Fills a circular or elliptical arc covering the specified rectangle.void
fillOval
(int x, int y, int width, int height) Fills an oval bounded by the specified rectangle with the current color.void
fillPolygon
(int[] xPoints, int[] yPoints, int nPoints) Fills a closed polygon defined by arrays of x and y coordinates.void
fillRect
(int x, int y, int width, int height) Fills the specified rectangle.void
fillRoundRect
(int x, int y, int width, int height, int arcWidth, int arcHeight) Fills the specified rounded corner rectangle with the current color.Returns the background color used for clearing a region.getClip()
Gets the current clipping area.Returns the bounding rectangle of the current clipping area.getColor()
Gets this graphics context's current color.Returns the currentComposite
in theGraphics2D
context.getFont()
Gets the current font.Get the rendering context of theFont
within thisGraphics2D
context.getPaint()
Returns the currentPaint
of theGraphics2D
context.getRenderingHint
(RenderingHints.Key hintKey) Returns the value of a single preference for the rendering algorithms.Gets the preferences for the rendering algorithms.Returns the currentStroke
in theGraphics2D
context.Returns a copy of the currentTransform
in theGraphics2D
context.boolean
Checks whether or not the specifiedShape
intersects the specifiedRectangle
, which is in device space.void
rotate
(double theta) Concatenates the currentGraphics2D
Transform
with a rotation transform.void
rotate
(double theta, double x, double y) Concatenates the currentGraphics2D
Transform
with a translated rotation transform.void
scale
(double sx, double sy) Concatenates the currentGraphics2D
Transform
with a scaling transformation Subsequent rendering is resized according to the specified scaling factors relative to the previous scaling.void
setBackground
(Color color) Sets the background color for theGraphics2D
context.void
setClip
(int x, int y, int width, int height) Sets the current clip to the rectangle specified by the given coordinates.void
Sets the current clipping area to an arbitrary clip shape.void
Sets this graphics context's current color to the specified color.void
setComposite
(Composite comp) Sets theComposite
for theGraphics2D
context.void
Sets this graphics context's font to the specified font.void
Sets thePaint
attribute for theGraphics2D
context.void
Sets the paint mode of this graphics context to overwrite the destination with this graphics context's current color.void
setRenderingHint
(RenderingHints.Key hintKey, Object hintValue) Sets the value of a single preference for the rendering algorithms.void
setRenderingHints
(Map hints) Replaces the values of all preferences for the rendering algorithms with the specifiedhints
.void
Sets theStroke
for theGraphics2D
context.void
Sets theTransform
in theGraphics2D
context.void
shear
(double shx, double shy) Concatenates the currentGraphics2D
Transform
with a shearing transform.void
Composes anAffineTransform
object with theTransform
in thisGraphics2D
according to the rule last-specified-first-applied.void
translate
(double tx, double ty) Concatenates the currentGraphics2D
Transform
with a translation transform.void
translate
(int x, int y) Translates the origin of the graphics context to the point (x, y) in the current coordinate system.Methods inherited from class java.awt.Graphics2D
draw, draw3DRect, drawRenderableImage, drawRenderedImage, drawString, fill, fill3DRect, getDeviceConfiguration
Methods inherited from class java.awt.Graphics
copyArea, create, create, dispose, drawBytes, drawChars, drawImage, drawImage, drawPolygon, fillPolygon, finalize, getClipBounds, getClipRect, getFontMetrics, getFontMetrics, hitClip, setXORMode, toString
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Field Details
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gc
Current state of the Graphic Context. The GraphicsContext class manages the state of this Graphics2D graphic context attributes. -
textAsShapes
protected boolean textAsShapesText handling strategy. -
inPossibleRecursion
protected boolean inPossibleRecursionProtection agains infinite recursion
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Constructor Details
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AbstractGraphics2D
public AbstractGraphics2D(boolean textAsShapes) - Parameters:
textAsShapes
- if true, all text is turned into shapes in the convertion. No text is output.
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AbstractGraphics2D
Creates a new AbstractGraphics2D from an existing instance.- Parameters:
g
- the AbstractGraphics2D whose properties should be copied
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Method Details
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translate
public void translate(int x, int y) Translates the origin of the graphics context to the point (x, y) in the current coordinate system. Modifies this graphics context so that its new origin corresponds to the point (x, y) in this graphics context's original coordinate system. All coordinates used in subsequent rendering operations on this graphics context will be relative to this new origin.- Specified by:
translate
in classGraphics2D
- Parameters:
x
- the x coordinate.y
- the y coordinate.
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getColor
Gets this graphics context's current color. -
setColor
Sets this graphics context's current color to the specified color. All subsequent graphics operations using this graphics context use this specified color. -
setPaintMode
public void setPaintMode()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.- Specified by:
setPaintMode
in classGraphics
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getFont
Gets the current font. -
setFont
Sets this graphics context's font to the specified font. All subsequent text operations using this graphics context use this font. -
getClipBounds
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 usingsetClip(null)
, this method returnsnull
. The coordinates in the rectangle are relative to the coordinate system origin of this graphics context.- Specified by:
getClipBounds
in classGraphics
- Returns:
- the bounding rectangle of the current clipping area,
or
null
if no clip is set. - Since:
- JDK1.1
- See Also:
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clipRect
public void clipRect(int x, int y, int width, int height) 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 usingsetClip(null)
, 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.- Specified by:
clipRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to intersect the clip withy
- the y coordinate of the rectangle to intersect the clip withwidth
- the width of the rectangle to intersect the clip withheight
- the height of the rectangle to intersect the clip with- See Also:
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setClip
public void setClip(int x, int y, int width, int height) 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. -
getClip
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 usingsetClip(null)
, this method returnsnull
. -
setClip
Sets the current clipping area to an arbitrary clip shape. Not all objects that implement theShape
interface can be used to set the clip. The onlyShape
objects that are guaranteed to be supported areShape
objects that are obtained via thegetClip
method and viaRectangle
objects. This method sets the user clip, which is independent of the clipping associated with device bounds and window visibility. -
drawLine
public void drawLine(int x1, int y1, int x2, int y2) Draws a line, using the current color, between the points(x1, y1)
and(x2, y2)
in this graphics context's coordinate system. -
fillRect
public void fillRect(int x, int y, int width, int height) Fills the specified rectangle. The left and right edges of the rectangle are atx
andx + width - 1
. The top and bottom edges are aty
andy + height - 1
. The resulting rectangle covers an areawidth
pixels wide byheight
pixels tall. The rectangle is filled using the graphics context's current color. -
drawRect
public void drawRect(int x, int y, int width, int height) -
clearRect
public void clearRect(int x, int y, int width, int 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.Beginning with Java 1.1, the background color of offscreen images may be system dependent. Applications should use
setColor
followed byfillRect
to ensure that an offscreen image is cleared to a specific color. -
drawRoundRect
public void drawRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight) Draws an outlined round-cornered rectangle using this graphics context's current color. The left and right edges of the rectangle are atx
andx + width
, respectively. The top and bottom edges of the rectangle are aty
andy + height
.- Specified by:
drawRoundRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to be drawn.y
- the y coordinate of the rectangle to be drawn.width
- the width of the rectangle to be drawn.height
- the height of the rectangle to be drawn.arcWidth
- the horizontal diameter of the arc at the four corners.arcHeight
- the vertical diameter of the arc at the four corners.- See Also:
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fillRoundRect
public void fillRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight) Fills the specified rounded corner rectangle with the current color. The left and right edges of the rectangle are atx
andx + width - 1
, respectively. The top and bottom edges of the rectangle are aty
andy + height - 1
.- Specified by:
fillRoundRect
in classGraphics
- Parameters:
x
- the x coordinate of the rectangle to be filled.y
- the y coordinate of the rectangle to be filled.width
- the width of the rectangle to be filled.height
- the height of the rectangle to be filled.arcWidth
- the horizontal diameter of the arc at the four corners.arcHeight
- the vertical diameter of the arc at the four corners.- See Also:
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drawOval
public void drawOval(int x, int y, int width, int height) Draws the outline of an oval. The result is a circle or ellipse that fits within the rectangle specified by thex
,y
,width
, andheight
arguments.The oval covers an area that is
width + 1
pixels wide andheight + 1
pixels tall. -
fillOval
public void fillOval(int x, int y, int width, int height) Fills an oval bounded by the specified rectangle with the current color. -
drawArc
public void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle) Draws the outline of a circular or elliptical arc covering the specified rectangle.The resulting arc begins at
startAngle
and extends forarcAngle
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.The center of the arc is the center of the rectangle whose origin is (x, y) and whose size is specified by the
width
andheight
arguments.The resulting arc covers an area
width + 1
pixels wide byheight + 1
pixels tall.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.
- Specified by:
drawArc
in classGraphics
- Parameters:
x
- the x coordinate of the upper-left corner of the arc to be drawn.y
- the y coordinate of the upper-left corner of the arc to be drawn.width
- the width of the arc to be drawn.height
- the height of the arc to be drawn.startAngle
- the beginning angle.arcAngle
- the angular extent of the arc, relative to the start angle.- See Also:
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fillArc
public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle) Fills a circular or elliptical arc covering the specified rectangle.The resulting arc begins at
startAngle
and extends forarcAngle
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.The center of the arc is the center of the rectangle whose origin is (x, y) and whose size is specified by the
width
andheight
arguments.The resulting arc covers an area
width + 1
pixels wide byheight + 1
pixels tall.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.
- Specified by:
fillArc
in classGraphics
- Parameters:
x
- the x coordinate of the upper-left corner of the arc to be filled.y
- the y coordinate of the upper-left corner of the arc to be filled.width
- the width of the arc to be filled.height
- the height of the arc to be filled.startAngle
- the beginning angle.arcAngle
- the angular extent of the arc, relative to the start angle.- See Also:
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drawPolyline
public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints) Draws a sequence of connected lines defined by arrays of x and y coordinates. Each pair of (x, y) coordinates defines a point. The figure is not closed if the first point differs from the last point.- Specified by:
drawPolyline
in classGraphics
- Parameters:
xPoints
- an array of x pointsyPoints
- an array of y pointsnPoints
- the total number of points- Since:
- JDK1.1
- See Also:
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drawPolygon
public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints) Draws a closed polygon defined by arrays of x and y coordinates. Each pair of (x, y) coordinates defines a point.This method draws the polygon defined by
nPoint
line segments, where the firstnPoint - 1
line segments are line segments from(xPoints[i - 1], yPoints[i - 1])
to(xPoints[i], yPoints[i])
, for 1 ≤ i ≤nPoints
. The figure is automatically closed by drawing a line connecting the final point to the first point, if those points are different.- Specified by:
drawPolygon
in classGraphics
- Parameters:
xPoints
- a an array ofx
coordinates.yPoints
- a an array ofy
coordinates.nPoints
- a the total number of points.- See Also:
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fillPolygon
public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints) Fills a closed polygon defined by arrays of x and y coordinates.This method draws the polygon defined by
nPoint
line segments, where the firstnPoint - 1
line segments are line segments from(xPoints[i - 1], yPoints[i - 1])
to(xPoints[i], yPoints[i])
, for 1 ≤ i ≤nPoints
. The figure is automatically closed by drawing a line connecting the final point to the first point, if those points are different.The area inside the polygon is defined using an even-odd fill rule, also known as the alternating rule.
- Specified by:
fillPolygon
in classGraphics
- Parameters:
xPoints
- a an array ofx
coordinates.yPoints
- a an array ofy
coordinates.nPoints
- a the total number of points.- See Also:
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drawString
Draws the text given by the specified string, using this graphics context's current font and color. The baseline of the first character is at position (x, y) in this graphics context's coordinate system.- Specified by:
drawString
in classGraphics2D
- Parameters:
str
- the string to be drawn.x
- the x coordinate.y
- the y coordinate.- See Also:
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drawString
Generic implementation for drawing attributed strings using TextLayout.- Specified by:
drawString
in classGraphics2D
- Parameters:
iterator
- the iterator whose text is to be renderedx
- the x coordinate where the iterator's text is to be renderedy
- the y coordinate where the iterator's text is to be rendered- See Also:
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drawString
Draws the text given by the specified iterator, using this graphics context's current color. The iterator has to specify a font for each character. The baseline of the first character is at position (x, y) in this graphics context's coordinate system.- Specified by:
drawString
in classGraphics2D
- Parameters:
iterator
- the iterator whose text is to be drawnx
- the x coordinate.y
- the y coordinate.- See Also:
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drawImage
Draws as much of the specified image as is currently available. The image is drawn with its top-left corner at (x, y) in this graphics context's coordinate space. 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.
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.
If the image has not yet been completely loaded, then
drawImage
returnsfalse
. As more of the image becomes available, the process that draws the image notifies the specified image observer. -
drawImage
public boolean drawImage(Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer) Draws as much of the specified image as has already been scaled to fit inside the specified rectangle.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.
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
drawImage
returnsfalse
. As more of the image becomes available, the process that draws the image notifies the specified image observer.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.
- Specified by:
drawImage
in classGraphics
- Parameters:
img
- the specified image to be drawn.x
- the x coordinate.y
- the y coordinate.width
- the width of the rectangle.height
- the height of the rectangle.bgcolor
- the background color to paint under the non-opaque portions of the image.observer
- object to be notified as more of the image is converted.- See Also:
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drawImage
public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver 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. Transparent pixels do not affect whatever pixels are already there.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
drawImage
returnsfalse
. As more of the image becomes available, the process that draws the image notifies the specified image observer.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.
- Specified by:
drawImage
in classGraphics
- Parameters:
img
- the specified image to be drawndx1
- the x coordinate of the first corner of the destination rectangle.dy1
- the y coordinate of the first corner of the destination rectangle.dx2
- the x coordinate of the second corner of the destination rectangle.dy2
- the y coordinate of the second corner of the destination rectangle.sx1
- the x coordinate of the first corner of the source rectangle.sy1
- the y coordinate of the first corner of the source rectangle.sx2
- the x coordinate of the second corner of the source rectangle.sy2
- the y coordinate of the second corner of the source rectangle.observer
- object to be notified as more of the image is scaled and converted.- Since:
- JDK1.1
- See Also:
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drawImage
public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver 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.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.
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
drawImage
returnsfalse
. As more of the image becomes available, the process that draws the image notifies the specified image observer.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.
- Specified by:
drawImage
in classGraphics
- Parameters:
img
- the specified image to be drawndx1
- the x coordinate of the first corner of the destination rectangle.dy1
- the y coordinate of the first corner of the destination rectangle.dx2
- the x coordinate of the second corner of the destination rectangle.dy2
- the y coordinate of the second corner of the destination rectangle.sx1
- the x coordinate of the first corner of the source rectangle.sy1
- the y coordinate of the first corner of the source rectangle.sx2
- the x coordinate of the second corner of the source rectangle.sy2
- the y coordinate of the second corner of the source rectangle.bgcolor
- the background color to paint under the non-opaque portions of the image.observer
- object to be notified as more of the image is scaled and converted.- Since:
- JDK1.1
- See Also:
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drawImage
Renders an image, applying a transform from image space into user space before drawing. The transformation from user space into device space is done with the currentTransform
in theGraphics2D
. The specified transformation is applied to the image before the transform attribute in theGraphics2D
context is applied. The rendering attributes applied include theClip
,Transform
, andComposite
attributes. Note that no rendering is done if the specified transform is noninvertible.- Specified by:
drawImage
in classGraphics2D
- Parameters:
img
- theImage
to be renderedxform
- the transformation from image space into user spaceobs
- theImageObserver
to be notified as more of theImage
is converted- Returns:
true
if theImage
is fully loaded and completely rendered;false
if theImage
is still being loaded.- See Also:
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drawImage
Renders aBufferedImage
that is filtered with aBufferedImageOp
. The rendering attributes applied include theClip
,Transform
andComposite
attributes. This is equivalent to:img1 = op.filter(img, null); drawImage(img1, new AffineTransform(1f,0f,0f,1f,x,y), null);
- Specified by:
drawImage
in classGraphics2D
- Parameters:
img
- theBufferedImage
to be renderedop
- the filter to be applied to the image before renderingx
- the x coordinate in user space where the image is renderedy
- the y coordinate in user space where the image is rendered- See Also:
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drawGlyphVector
Renders the text of the specifiedGlyphVector
using theGraphics2D
context's rendering attributes. The rendering attributes applied include theClip
,Transform
,Paint
, andComposite
attributes. TheGlyphVector
specifies individual glyphs from aFont
. TheGlyphVector
can also contain the glyph positions. This is the fastest way to render a set of characters to the screen.- Specified by:
drawGlyphVector
in classGraphics2D
- Parameters:
g
- theGlyphVector
to be renderedx
- the x position in user space where the glyphs should be renderedy
- the y position in user space where the glyphs should be rendered- See Also:
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hit
Checks whether or not the specifiedShape
intersects the specifiedRectangle
, which is in device space. IfonStroke
is false, this method checks whether or not the interior of the specifiedShape
intersects the specifiedRectangle
. IfonStroke
istrue
, this method checks whether or not theStroke
of the specifiedShape
outline intersects the specifiedRectangle
. The rendering attributes taken into account include theClip
,Transform
, andStroke
attributes.- Specified by:
hit
in classGraphics2D
- Parameters:
rect
- the area in device space to check for a hits
- theShape
to check for a hitonStroke
- flag used to choose between testing the stroked or the filled shape. If the flag istrue
, theStroke
oultine is tested. If the flag isfalse
, the filledShape
is tested.- Returns:
true
if there is a hit;false
otherwise.- See Also:
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setComposite
Sets theComposite
for theGraphics2D
context. TheComposite
is used in all drawing methods such asdrawImage
,drawString
,draw
, andfill
. It specifies how new pixels are to be combined with the existing pixels on the graphics device during the rendering process.If this
Graphics2D
context is drawing to aComponent
on the display screen and theComposite
is a custom object rather than an instance of theAlphaComposite
class, and if there is a security manager, itscheckPermission
method is called with anAWTPermission("readDisplayPixels")
permission.- Specified by:
setComposite
in classGraphics2D
- Parameters:
comp
- theComposite
object to be used for rendering- Throws:
SecurityException
- if a customComposite
object is being used to render to the screen and a security manager is set and itscheckPermission
method does not allow the operation.- See Also:
-
setPaint
Sets thePaint
attribute for theGraphics2D
context. Calling this method with anull
Paint
object does not have any effect on the currentPaint
attribute of thisGraphics2D
.- Specified by:
setPaint
in classGraphics2D
- Parameters:
paint
- thePaint
object to be used to generate color during the rendering process, ornull
- See Also:
-
setStroke
Sets theStroke
for theGraphics2D
context.- Specified by:
setStroke
in classGraphics2D
- Parameters:
s
- theStroke
object to be used to stroke aShape
during the rendering process
-
setRenderingHint
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 theRenderingHints
class for definitions of some common keys and values.- Specified by:
setRenderingHint
in classGraphics2D
- Parameters:
hintKey
- the key of the hint to be set.hintValue
- the value indicating preferences for the specified hint category.- See Also:
-
getRenderingHint
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 theRenderingHints
class for definitions of some common keys and values.- Specified by:
getRenderingHint
in classGraphics2D
- Parameters:
hintKey
- the key corresponding to the hint to get.- Returns:
- an object representing the value for the specified hint key.
Some of the keys and their associated values are defined in the
RenderingHints
class. - See Also:
-
setRenderingHints
Replaces the values of all preferences for the rendering algorithms with the specifiedhints
. The existing values for all rendering hints are discarded and the new set of known hints and values are initialized from the specifiedMap
object. Hint categories include controls for rendering quality and overall time/quality trade-off in the rendering process. Refer to theRenderingHints
class for definitions of some common keys and values.- Specified by:
setRenderingHints
in classGraphics2D
- Parameters:
hints
- the rendering hints to be set- See Also:
-
addRenderingHints
Sets the values of an arbitrary number of preferences for the rendering algorithms. Only values for the rendering hints that are present in the specifiedMap
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 theRenderingHints
class for definitions of some common keys and values.- Specified by:
addRenderingHints
in classGraphics2D
- Parameters:
hints
- the rendering hints to be set- See Also:
-
getRenderingHints
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 theRenderingHints
class for definitions of some common keys and values.- Specified by:
getRenderingHints
in classGraphics2D
- Returns:
- a reference to an instance of
RenderingHints
that contains the current preferences. - See Also:
-
translate
public void translate(double tx, double ty) Concatenates the currentGraphics2D
Transform
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 anAffineTransform
represented by the following matrix:[ 1 0 tx ] [ 0 1 ty ] [ 0 0 1 ]
- Specified by:
translate
in classGraphics2D
- Parameters:
tx
- the distance to translate along the x-axisty
- the distance to translate along the y-axis
-
rotate
public void rotate(double theta) Concatenates the currentGraphics2D
Transform
with a rotation transform. Subsequent rendering is rotated by the specified radians relative to the previous origin. This is equivalent to callingtransform(R)
, where R is anAffineTransform
represented by the following matrix:[ cos(theta) -sin(theta) 0 ] [ sin(theta) cos(theta) 0 ] [ 0 0 1 ]
Rotating with a positive angle theta rotates points on the positive x axis toward the positive y axis.- Specified by:
rotate
in classGraphics2D
- Parameters:
theta
- the angle of rotation in radians
-
rotate
public void rotate(double theta, double x, double y) Concatenates the currentGraphics2D
Transform
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:translate(x, y); rotate(theta); translate(-x, -y);
Rotating with a positive angle theta rotates points on the positive x axis toward the positive y axis.- Specified by:
rotate
in classGraphics2D
- Parameters:
theta
- the angle of rotation in radiansx
- the x coordinate of the origin of the rotationy
- the y coordinate of the origin of the rotation
-
scale
public void scale(double sx, double sy) Concatenates the currentGraphics2D
Transform
with a scaling transformation Subsequent rendering is resized according to the specified scaling factors relative to the previous scaling. This is equivalent to callingtransform(S)
, where S is anAffineTransform
represented by the following matrix:[ sx 0 0 ] [ 0 sy 0 ] [ 0 0 1 ]
- Specified by:
scale
in classGraphics2D
- Parameters:
sx
- the amount by which X coordinates in subsequent rendering operations are multiplied relative to previous rendering operations.sy
- the amount by which Y coordinates in subsequent rendering operations are multiplied relative to previous rendering operations.
-
shear
public void shear(double shx, double shy) Concatenates the currentGraphics2D
Transform
with a shearing transform. Subsequent renderings are sheared by the specified multiplier relative to the previous position. This is equivalent to callingtransform(SH)
, where SH is anAffineTransform
represented by the following matrix:[ 1 shx 0 ] [ shy 1 0 ] [ 0 0 1 ]
- Specified by:
shear
in classGraphics2D
- Parameters:
shx
- the multiplier by which coordinates are shifted in the positive X axis direction as a function of their Y coordinateshy
- the multiplier by which coordinates are shifted in the positive Y axis direction as a function of their X coordinate
-
transform
Composes anAffineTransform
object with theTransform
in thisGraphics2D
according to the rule last-specified-first-applied. If the currentTransform
is Cx, the result of composition with Tx is a newTransform
Cx'. Cx' becomes the currentTransform
for thisGraphics2D
. Transforming a point p by the updatedTransform
Cx' is equivalent to first transforming p by Tx and then transforming the result by the originalTransform
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.- Specified by:
transform
in classGraphics2D
- Parameters:
tx
- theAffineTransform
object to be composed with the currentTransform
- See Also:
-
setTransform
Sets theTransform
in theGraphics2D
context.- Specified by:
setTransform
in classGraphics2D
- Parameters:
tx
- theAffineTransform
object to be used in the rendering process- See Also:
-
getTransform
Returns a copy of the currentTransform
in theGraphics2D
context.- Specified by:
getTransform
in classGraphics2D
- Returns:
- the current
AffineTransform
in theGraphics2D
context. - See Also:
-
getPaint
Returns the currentPaint
of theGraphics2D
context.- Specified by:
getPaint
in classGraphics2D
- Returns:
- the current
Graphics2D
Paint
, which defines a color or pattern. - See Also:
-
getComposite
Returns the currentComposite
in theGraphics2D
context.- Specified by:
getComposite
in classGraphics2D
- Returns:
- the current
Graphics2D
Composite
, which defines a compositing style. - See Also:
-
setBackground
Sets the background color for theGraphics2D
context. The background color is used for clearing a region. When aGraphics2D
is constructed for aComponent
, the background color is inherited from theComponent
. Setting the background color in theGraphics2D
context only affects the subsequentclearRect
calls and not the background color of theComponent
. To change the background of theComponent
, use appropriate methods of theComponent
.- Specified by:
setBackground
in classGraphics2D
- Parameters:
color
- the background color that isused in subsequent calls toclearRect
- See Also:
-
getBackground
Returns the background color used for clearing a region.- Specified by:
getBackground
in classGraphics2D
- Returns:
- the current
Graphics2D
Color
, which defines the background color. - See Also:
-
getStroke
Returns the currentStroke
in theGraphics2D
context.- Specified by:
getStroke
in classGraphics2D
- Returns:
- the current
Graphics2D
Stroke
, which defines the line style. - See Also:
-
clip
Intersects the currentClip
with the interior of the specifiedShape
and sets theClip
to the resulting intersection. The specifiedShape
is transformed with the currentGraphics2D
Transform
before being intersected with the currentClip
. This method is used to make the currentClip
smaller. To make theClip
larger, usesetClip
. The user clip 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 usingsetClip
with anull
argument, the specifiedShape
becomes the new user clip.- Specified by:
clip
in classGraphics2D
- Parameters:
s
- theShape
to be intersected with the currentClip
. Ifs
isnull
, this method clears the currentClip
.
-
getFontRenderContext
Get the rendering context of theFont
within thisGraphics2D
context. TheFontRenderContext
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 asFont
andTextLayout
. 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.- Specified by:
getFontRenderContext
in classGraphics2D
- Returns:
- a reference to an instance of FontRenderContext.
- Since:
- JDK1.2
- See Also:
-
getGraphicContext
- Returns:
- the
GraphicContext
of thisGraphics2D
.
-