|
JavaTM 2 Platform Std. Ed. v1.4.2 |
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||||
java.lang.Objectjava.awt.font.FontRenderContext
The FontRenderContext class is a container for the
information needed to correctly measure text. The measurement of text
can vary because of rules that map outlines to pixels, and rendering
hints provided by an application.
One such piece of information is a transform that scales typographical points to pixels. (A point is defined to be exactly 1/72 of an inch, which is slightly different than the traditional mechanical measurement of a point.) A character that is rendered at 12pt on a 600dpi device might have a different size than the same character rendered at 12pt on a 72dpi device because of such factors as rounding to pixel boundaries and hints that the font designer may have specified.
Anti-aliasing and Fractional-metrics specified by an application can also affect the size of a character because of rounding to pixel boundaries.
Typically, instances of FontRenderContext are
obtained from a Graphics2D object. A
FontRenderContext which is directly constructed will
most likely not represent any actual graphics device, and may lead
to unexpected or incorrect results.
RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.KEY_FRACTIONALMETRICS,
Graphics2D.getFontRenderContext(),
LineMetrics| Constructor Summary | |
protected |
FontRenderContext()
Constructs a new FontRenderContext
object. |
|
FontRenderContext(AffineTransform tx,
boolean isAntiAliased,
boolean usesFractionalMetrics)
Constructs a FontRenderContext object from an
optional AffineTransform and two boolean
values that determine if the newly constructed object has
anti-aliasing or fractional metrics. |
| Method Summary | |
boolean |
equals(FontRenderContext rhs)
Return true if rhs has the same transform, antialiasing, and fractional metrics values as this. |
boolean |
equals(Object obj)
Return true if obj is an instance of FontRenderContext and has the same transform, antialiasing, and fractional metrics values as this. |
AffineTransform |
getTransform()
Gets the transform that is used to scale typographical points to pixels in this FontRenderContext. |
int |
hashCode()
Return a hashcode for this FontRenderContext. |
boolean |
isAntiAliased()
Gets the text anti-aliasing mode used in this FontRenderContext. |
boolean |
usesFractionalMetrics()
Gets the text fractional metrics mode requested by the application for use in this FontRenderContext. |
| Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
protected FontRenderContext()
FontRenderContext
object.
public FontRenderContext(AffineTransform tx,
boolean isAntiAliased,
boolean usesFractionalMetrics)
FontRenderContext object from an
optional AffineTransform and two boolean
values that determine if the newly constructed object has
anti-aliasing or fractional metrics.
tx - the transform which is used to scale typographical points
to pixels in this FontRenderContext. If null, an
identity tranform is used.isAntiAliased - determines if the newly contructed object has
anti-aliasingusesFractionalMetrics - determines if the newly constructed
object uses fractional metrics| Method Detail |
public AffineTransform getTransform()
FontRenderContext.
AffineTransform of this
FontRenderContext.AffineTransformpublic boolean isAntiAliased()
FontRenderContext.
true, if text is anti-aliased in this
FontRenderContext; false otherwise.RenderingHints.KEY_TEXT_ANTIALIASINGpublic boolean usesFractionalMetrics()
FontRenderContext.
true, if layout should be performed with
fractional metrics; false otherwise.
in this FontRenderContext.RenderingHints.KEY_FRACTIONALMETRICSpublic boolean equals(Object obj)
equals in class Objectobj - the object to test for equality
true if the specified object is equal to
this FontRenderContext; false
otherwise.Object.hashCode(),
Hashtablepublic boolean equals(FontRenderContext rhs)
rhs - the FontRenderContext to test for equality
true if rhs is equal to
this FontRenderContext; false
otherwise.public int hashCode()
hashCode in class ObjectObject.equals(java.lang.Object),
Hashtable
|
JavaTM 2 Platform Std. Ed. v1.4.2 |
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||||
Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.