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## org.apache.fop.render.java2d
Class Java2DFontMetrics

    java.lang.Object
      org.apache.fop.render.java2d.Java2DFontMetrics

public class Java2DFontMetrics
extends java.lang.Object

This is a FontMetrics to be used for AWT rendering. It instanciates a font, depening on family and style values. The java.awt.FontMetrics for this font is then created to be used for the actual measurement. Since layout is word by word and since it is expected that two subsequent words often share the same style, the Font and FontMetrics is buffered and only changed if needed.

Since FontState and FontInfo multiply all factors by size, we assume a "standard" font of FONT_SIZE.

Field Summary
`static int` | `FONT_FACTOR` This factor multiplies the calculated values to scale to FOP internal measurements
`static int` | `FONT_SIZE` Font size standard used for metric measurements

Constructor Summary
`Java2DFontMetrics(java.awt.Graphics2D graphics)` Constructs a new Font-metrics.

Method Summary
`static java.awt.Graphics2D` | `createFontMetricsGraphics2D()` Creates a Graphics2D object for the sole purpose of getting font metrics.
`int` | `getAscender(java.lang.String family, int style, int size)` Determines the font ascent of the Font described by this FontMetrics object
`int` | `getCapHeight(java.lang.String family, int style, int size)` The size of a capital letter measured from the font's baseline
`int` | `getDescender(java.lang.String family, int style, int size)` Determines the font descent of the Font described by this FontMetrics object
`java.awt.Font` | `getFont(java.lang.String family, int style, int size)` Returns a java.awt.Font instance for the desired family, style and size type.
`int` | `getMaxAscent(java.lang.String family, int style, int size)` Determines the font's maximum ascent of the Font described by the current FontMetrics object
`int[]` | `getWidths(java.lang.String family, int style, int size)` Return widths (in 1/1000ths of point size) of all characters
`int` | `getXHeight(java.lang.String family, int style, int size)` Determines the typical font height of a small cap letter FontMetrics object
`boolean` | `hasChar(java.lang.String family, int style, int size, char c)` Indicates whether the font contains a particular character/glyph.
`int` | `width(int i, java.lang.String family, int style, int size)` Returns width (in 1/1000ths of point size) of character at code point i

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### FONT_SIZE

    public static final int FONT_SIZE

  Font size standard used for metric measurements

  See Also:
    Constant Field Values

### FONT_FACTOR

    public static final int FONT_FACTOR

  This factor multiplies the calculated values to scale to FOP internal measurements

  See Also:
    Constant Field Values

Constructor Detail

### Java2DFontMetrics

    public Java2DFontMetrics(java.awt.Graphics2D graphics)

  Constructs a new Font-metrics.

Parameters:
  `graphics` - a temp graphics object - this is needed so that we can get an instance of java.awt.FontMetrics

Method Detail

### createFontMetricsGraphics2D

    public static java.awt.Graphics2D createFontMetricsGraphics2D()

  Creates a Graphics2D object for the sole purpose of getting font metrics.

  Returns:
    a Graphics2D object

### getMaxAscent

    public int getMaxAscent(java.lang.String family,
                            int style,
                            int size)

  Determines the font's maximum ascent of the Font described by the current FontMetrics object

  Parameters:
    `family` - font family (java name) to use
    `style` - font style (java def.) to use
    `size` - font size
  Returns:
    ascent in milliponts

### getAscender

    public int getAscender(java.lang.String family,
                           int style,
                           int size)

  Determines the font ascent of the Font described by this FontMetrics object

  Parameters:
    `family` - font family (java name) to use
    `style` - font style (java def.) to use
    `size` - font size
  Returns:
    ascent in milliponts

### getCapHeight

    public int getCapHeight(java.lang.String family,
                            int style,
                            int size)

  The size of a capital letter measured from the font's baseline

  Parameters:
    `family` - font family
    `style` - font style
    `size` - font size
  Returns:
    capital height in millipoints

### getDescender

    public int getDescender(java.lang.String family,
                            int style,
                            int size)

  Determines the font descent of the Font described by this FontMetrics object

  Parameters:
    `family` - font family (jave name) to use
    `style` - font style (jave def.) to use
    `size` - font size
  Returns:
    descent in milliponts

### getXHeight

    public int getXHeight(java.lang.String family,
                          int style,
                          int size)

  Determines the typical font height of a small cap letter FontMetrics object

  Parameters:
    `family` - font family (jave name) to use
    `style` - font style (jave def.) to use
    `size` - font size
  Returns:
    font height in milliponts

### width

    public int width(int i,
                     java.lang.String family,
                     int style,
                     int size)

  Returns width (in 1/1000ths of point size) of character at code point i

  Parameters:
    `i` - the character for which to get the width
    `family` - font family (jave name) to use
    `style` - font style (jave def.) to use
    `size` - font size
  Returns:
    character width in millipoints

### getWidths

    public int[] getWidths(java.lang.String family,
                           int style,
                           int size)

  Return widths (in 1/1000ths of point size) of all characters

  Parameters:
    `family` - font family (jave name) to use
    `style` - font style (jave def.) to use
    `size` - font size
  Returns:
    array of character widths in millipoints

### getFont

    public java.awt.Font getFont(java.lang.String family,
                                 int style,
                                 int size)

  Returns a java.awt.Font instance for the desired family, style and size type. This is here, so that the font-mapping of FOP-defined fonts to java-fonts can be done in one place and does not need to occur in AWTFontRenderer.

  Parameters:
    `family` - font family (jave name) to use
    `style` - font style (jave def.) to use
    `size` - font size
  Returns:
    font with the desired characeristics.

### hasChar

    public boolean hasChar(java.lang.String family,
                           int style,
                           int size,
                           char c)

  Indicates whether the font contains a particular character/glyph.

  Parameters:
    `family` - font family (jave name) to use
    `style` - font style (jave def.) to use
    `size` - font size
    `c` - the glyph to check
  Returns:
    true if the character is supported

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