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## java.awt.font
Class GlyphVector

    java.lang.Object
      |
      +--java.awt.font.GlyphVector

All Implemented Interfaces:
  Cloneable

public abstract class GlyphVector
extends Object
implements Cloneable

A `GlyphVector` object is a collection of glyphs containing geometric information for the placement of each glyph in a transformed coordinate space which corresponds to the device on which the `GlyphVector` is ultimately displayed.

The `GlyphVector` does not attempt any interpretation of the sequence of glyphs it contains. Relationships between adjacent glyphs in sequence are solely used to determine the placement of the glyphs in the visual coordinate space.

Instances of `GlyphVector` are created by a `Font`.

In a text processing application that can cache intermediate representations of text, creation and subsequent caching of a `GlyphVector` for use during rendering is the fastest method to present the visual representation of characters to a user.

A `GlyphVector` is associated with exactly one `Font`, and can provide data useful only in relation to this `Font`. In addition, metrics obtained from a `GlyphVector` are not generally geometrically scaleable since the pixelization and spacing are dependent on grid-fitting algorithms within a `Font`. To facilitate accurate measurement of a `GlyphVector` and its component glyphs, you must specify a scaling transform, anti-alias mode, and fractional metrics mode when creating the `GlyphVector`. These characteristics can be derived from the destination device.

For each glyph in the `GlyphVector`, you can obtain:

- the position of the glyph
- the transform associated with the glyph
- the metrics of the glyph in the context of the `GlyphVector`. The metrics of the glyph may be different under different transforms, application specified rendering hints, and the specific instance of the glyph within the `GlyphVector`.

Altering the data used to create the `GlyphVector` does not alter the state of the `GlyphVector`.

Methods are provided to adjust the positions of the glyphs within the `GlyphVector`. These methods are most appropriate for applications that are performing justification operations for the presentation of the glyphs.

Methods are provided to transform individual glyphs within the `GlyphVector`. These methods are primarily useful for special effects.

Methods are provided to return both the visual, logical, and pixel bounds of the entire `GlyphVector` or of individual glyphs within the `GlyphVector`.

Methods are provided to return a `Shape` for the `GlyphVector`, and for individual glyphs within the `GlyphVector`.

See Also:
  `Font`, `GlyphMetrics`, `TextLayout`

Field Summary
`static int` | `FLAG_COMPLEX_GLYPHS` A flag used with getLayoutFlags that indicates that this `GlyphVector` has a complex glyph-to-char mapping (one that does not map glyphs to chars one-to-one in strictly ascending or descending order matching the run direction).
`static int` | `FLAG_HAS_POSITION_ADJUSTMENTS` A flag used with getLayoutFlags that indicates that this `GlyphVector` has position adjustments.
`static int` | `FLAG_HAS_TRANSFORMS` A flag used with getLayoutFlags that indicates that this `GlyphVector` has per-glyph transforms.
`static int` | `FLAG_MASK` A mask for supported flags from getLayoutFlags.
`static int` | `FLAG_RUN_RTL` A flag used with getLayoutFlags that indicates that this `GlyphVector` has a right-to-left run direction.

Constructor Summary
`GlyphVector()`

Method Summary
`abstract boolean` | `equals(GlyphVector set)` Tests if the specified `GlyphVector` exactly equals this `GlyphVector`.
`abstract Font` | `getFont()` Returns the `Font` associated with this `GlyphVector`.
`abstract FontRenderContext` | `getFontRenderContext()` Returns the `FontRenderContext` associated with this `GlyphVector`.
`int` | `getGlyphCharIndex(int glyphIndex)` Returns the character index of the specified glyph.
`int[]` | `getGlyphCharIndices(int beginGlyphIndex, int numEntries, int[] codeReturn)` Returns the character indices of the specified glyphs.
`abstract int` | `getGlyphCode(int glyphIndex)` Returns the glyphcode of the specified glyph.
`abstract int[]` | `getGlyphCodes(int beginGlyphIndex, int numEntries, int[] codeReturn)` Returns an array of glyphcodes for the specified glyphs.
`abstract GlyphJustificationInfo` | `getGlyphJustificationInfo(int glyphIndex)` Returns the justification information for the glyph at the specified index into this `GlyphVector`.
`abstract Shape` | `getGlyphLogicalBounds(int glyphIndex)` Returns the logical bounds of the specified glyph within this `GlyphVector`.
`abstract GlyphMetrics` | `getGlyphMetrics(int glyphIndex)` Returns the metrics of the glyph at the specified index into this `GlyphVector`.
`abstract Shape` | `getGlyphOutline(int glyphIndex)` Returns a `Shape` whose interior corresponds to the visual representation of the specified glyph within this `GlyphVector`.
`Shape` | `getGlyphOutline(int glyphIndex, float x, float y)` Returns a `Shape` whose interior corresponds to the visual representation of the specified glyph within this `GlyphVector`, offset to x, y.
`Rectangle` | `getGlyphPixelBounds(int index, FontRenderContext renderFRC, float x, float y)` Returns the pixel bounds of the glyph at index when this `GlyphVector` is rendered in a `Graphics` with the given `FontRenderContext` at the given location.
`abstract Point2D` | `getGlyphPosition(int glyphIndex)` Returns the position of the specified glyph relative to the origin of this `GlyphVector`.
`abstract float[]` | `getGlyphPositions(int beginGlyphIndex, int numEntries, float[] positionReturn)` Returns an array of glyph positions for the specified glyphs.
`abstract AffineTransform` | `getGlyphTransform(int glyphIndex)` Returns the transform of the specified glyph within this `GlyphVector`.
`abstract Shape` | `getGlyphVisualBounds(int glyphIndex)` Returns the visual bounds of the specified glyph within the `GlyphVector`.
`int` | `getLayoutFlags()` Returns flags describing the global state of the GlyphVector.
`abstract Rectangle2D` | `getLogicalBounds()` Returns the logical bounds of this `GlyphVector`.
`abstract int` | `getNumGlyphs()` Returns the number of glyphs in this `GlyphVector`.
`abstract Shape` | `getOutline()` Returns a `Shape` whose interior corresponds to the visual representation of this `GlyphVector`.
`abstract Shape` | `getOutline(float x, float y)` Returns a `Shape` whose interior corresponds to the visual representation of this `GlyphVector` when rendered at x, y.
`Rectangle` | `getPixelBounds(FontRenderContext renderFRC, float x, float y)` Returns the pixel bounds of this `GlyphVector` when rendered in a graphics with the given `FontRenderContext` at the given location.
`abstract Rectangle2D` | `getVisualBounds()` Returns the visual bounds of this `GlyphVector` The visual bounds is the bounding box of the outline of this `GlyphVector`.
`abstract void` | `performDefaultLayout()` Assigns default positions to each glyph in this `GlyphVector`.
`abstract void` | `setGlyphPosition(int glyphIndex, Point2D newPos)` Sets the position of the specified glyph within this `GlyphVector`.
`abstract void` | `setGlyphTransform(int glyphIndex, AffineTransform newTX)` Sets the transform of the specified glyph within this `GlyphVector`.

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

Field Detail

### FLAG_HAS_TRANSFORMS

    public static final int FLAG_HAS_TRANSFORMS

  A flag used with getLayoutFlags that indicates that this `GlyphVector` has per-glyph transforms.

  Since:
    1.4
  See Also:
    Constant Field Values

### FLAG_HAS_POSITION_ADJUSTMENTS

    public static final int FLAG_HAS_POSITION_ADJUSTMENTS

  A flag used with getLayoutFlags that indicates that this `GlyphVector` has position adjustments. When this is true, the glyph positions don't match the accumulated default advances of the glyphs (for example, if kerning has been done).

  Since:
    1.4
  See Also:
    Constant Field Values

### FLAG_RUN_RTL

    public static final int FLAG_RUN_RTL

  A flag used with getLayoutFlags that indicates that this `GlyphVector` has a right-to-left run direction. This refers to the glyph-to-char mapping and does not imply that the visual locations of the glyphs are necessarily in this order, although generally they will be.

  Since:
    1.4
  See Also:
    Constant Field Values

### FLAG_COMPLEX_GLYPHS

    public static final int FLAG_COMPLEX_GLYPHS

  A flag used with getLayoutFlags that indicates that this `GlyphVector` has a complex glyph-to-char mapping (one that does not map glyphs to chars one-to-one in strictly ascending or descending order matching the run direction).

  Since:
    1.4
  See Also:
    Constant Field Values

### FLAG_MASK

    public static final int FLAG_MASK

  A mask for supported flags from getLayoutFlags. Only bits covered by the mask should be tested.

  Since:
    1.4
  See Also:
    Constant Field Values

Constructor Detail

### GlyphVector

    public GlyphVector()

Method Detail

### getFont

    public abstract Font getFont()

  Returns the `Font` associated with this `GlyphVector`.

  Returns:
    `Font` used to create this `GlyphVector`.
  See Also:
    `Font`

### getFontRenderContext

    public abstract FontRenderContext getFontRenderContext()

  Returns the `FontRenderContext` associated with this `GlyphVector`.

  Returns:
    `FontRenderContext` used to create this `GlyphVector`.
  See Also:
    `FontRenderContext`, `Font`

### performDefaultLayout

    public abstract void performDefaultLayout()

  Assigns default positions to each glyph in this `GlyphVector`. This can destroy information generated during initial layout of this `GlyphVector`.

### getNumGlyphs

    public abstract int getNumGlyphs()

  Returns the number of glyphs in this `GlyphVector`.

  Returns:
    number of glyphs in this `GlyphVector`.

### getGlyphCode

    public abstract int getGlyphCode(int glyphIndex)

  Returns the glyphcode of the specified glyph. This return value is meaningless to anything other than the `Font` object that created this `GlyphVector`.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector` that corresponds to the glyph from which to retrieve the glyphcode.
  Returns:
    the glyphcode of the glyph at the specified `glyphIndex`.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`

### getGlyphCodes

    public abstract int[] getGlyphCodes(int beginGlyphIndex,
                                        int numEntries,
                                        int[] codeReturn)

  Returns an array of glyphcodes for the specified glyphs. The contents of this return value are meaningless to anything other than the `Font` used to create this `GlyphVector`. This method is used for convenience and performance when processing glyphcodes. If no array is passed in, a new array is created.

  Parameters:
    `beginGlyphIndex` - the index into this `GlyphVector` at which to start retrieving glyphcodes
    `numEntries` - the number of glyphcodes to retrieve
    `codeReturn` - the array that receives the glyphcodes and is then returned
  Returns:
    an array of glyphcodes for the specified glyphs.
  Throws:
    `IllegalArgumentException` - if `numEntries` is less than 0
    `IndexOutOfBoundsException` - if `beginGlyphIndex` is less than 0
    `IndexOutOfBoundsException` - if the sum of `beginGlyphIndex` and `numEntries` is greater than the number of glyphs in this `GlyphVector`

### getGlyphCharIndex

    public int getGlyphCharIndex(int glyphIndex)

  Returns the character index of the specified glyph. The character index is the index of the first logical character represented by the glyph. The default implementation assumes a one-to-one, left-to-right mapping of glyphs to characters.

  Parameters:
    `glyphIndex` - the index of the glyph
  Returns:
    the index of the first character represented by the glyph
  Since:
    1.4

### getGlyphCharIndices

    public int[] getGlyphCharIndices(int beginGlyphIndex,
                                     int numEntries,
                                     int[] codeReturn)

  Returns the character indices of the specified glyphs. The character index is the index of the first logical character represented by the glyph. Indices are returned in glyph order. The default implementation invokes getGlyphCharIndex for each glyph, and subclassers will probably want to override this implementation for performance reasons. Use this method for convenience and performance in processing of glyphcodes. If no array is passed in, a new array is created.

  Parameters:
    `beginGlyphIndex` - the index of the first glyph
    `numEntries` - the number of glyph indices
    `codeReturn` - the array into which to return the character indices
  Returns:
    an array of character indices, one per glyph.
  Since:
    1.4

### getLogicalBounds

    public abstract Rectangle2D getLogicalBounds()

  Returns the logical bounds of this `GlyphVector`. This method is used when positioning this `GlyphVector` in relation to visually adjacent `GlyphVector` objects.

  Returns:
    a `Rectangle2D` that is the logical bounds of this `GlyphVector`.

### getVisualBounds

    public abstract Rectangle2D getVisualBounds()

  Returns the visual bounds of this `GlyphVector` The visual bounds is the bounding box of the outline of this `GlyphVector`. Because of rasterization and alignment of pixels, it is possible that this box does not enclose all pixels affected by rendering this `GlyphVector`.

  Returns:
    a `Rectangle2D` that is the bounding box of this `GlyphVector`.

### getPixelBounds

    public Rectangle getPixelBounds(FontRenderContext renderFRC,
                                    float x,
                                    float y)

  Returns the pixel bounds of this `GlyphVector` when rendered in a graphics with the given `FontRenderContext` at the given location. The renderFRC need not be the same as the `FontRenderContext` of this `GlyphVector`, and can be null. If it is null, the `FontRenderContext` of this `GlyphVector` is used. The default implementation returns the visual bounds, offset to x, y and rounded out to the next integer value (i.e. returns an integer rectangle which encloses the visual bounds) and ignores the FRC. Subclassers should override this method.

  Parameters:
    `renderFRC` - the `FontRenderContext` of the `Graphics`.
    `x` - the x-coordinate at which to render this `GlyphVector`.
    `y` - the y-coordinate at which to render this `GlyphVector`.
  Returns:
    a `Rectangle` bounding the pixels that would be affected.
  Since:
    1.4

### getOutline

    public abstract Shape getOutline()

  Returns a `Shape` whose interior corresponds to the visual representation of this `GlyphVector`.

  Returns:
    a `Shape` that is the outline of this `GlyphVector`.

### getOutline

    public abstract Shape getOutline(float x,
                                     float y)

  Returns a `Shape` whose interior corresponds to the visual representation of this `GlyphVector` when rendered at x, y.

  Returns:
    a `Shape` that is the outline of this `GlyphVector` when rendered at the specified coordinates.

### getGlyphOutline

    public abstract Shape getGlyphOutline(int glyphIndex)

  Returns a `Shape` whose interior corresponds to the visual representation of the specified glyph within this `GlyphVector`. The outline returned by this method is positioned around the origin of each individual glyph.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector`
  Returns:
    a `Shape` that is the outline of the glyph at the specified `glyphIndex` of this `GlyphVector`.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`

### getGlyphOutline

    public Shape getGlyphOutline(int glyphIndex,
                                 float x,
                                 float y)

  Returns a `Shape` whose interior corresponds to the visual representation of the specified glyph within this `GlyphVector`, offset to x, y. The outline returned by this method is positioned around the origin of each individual glyph.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector`
  Returns:
    a `Shape` that is the outline of the glyph at the specified `glyphIndex` of this `GlyphVector` when rendered at the specified coordinates.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`
  Since:
    1.4

### getGlyphPosition

    public abstract Point2D getGlyphPosition(int glyphIndex)

  Returns the position of the specified glyph relative to the origin of this `GlyphVector`. If `glyphIndex` equals the number of of glyphs in this `GlyphVector`, this method returns the position after the last glyph. This position is used to define the advance of the entire `GlyphVector`.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector`
  Returns:
    a `Point2D` object that is the position of the glyph at the specified `glyphIndex`.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than the number of glyphs in this `GlyphVector`
  See Also:
    `setGlyphPosition(int, java.awt.geom.Point2D)`

### setGlyphPosition

    public abstract void setGlyphPosition(int glyphIndex,
                                          Point2D newPos)

  Sets the position of the specified glyph within this `GlyphVector`. If `glyphIndex` equals the number of of glyphs in this `GlyphVector`, this method sets the position after the last glyph. This position is used to define the advance of the entire `GlyphVector`.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector`
    `newPos` - the `Point2D` at which to position the glyph at the specified `glyphIndex`
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than the number of glyphs in this `GlyphVector`
  See Also:
    `getGlyphPosition(int)`

### getGlyphTransform

    public abstract AffineTransform getGlyphTransform(int glyphIndex)

  Returns the transform of the specified glyph within this `GlyphVector`. The transform is relative to the glyph position. If no special transform has been applied, `null` can be returned. A null return indicates an identity transform.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector`
  Returns:
    an `AffineTransform` that is the transform of the glyph at the specified `glyphIndex`.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`
  See Also:
    `setGlyphTransform(int, java.awt.geom.AffineTransform)`

### setGlyphTransform

    public abstract void setGlyphTransform(int glyphIndex,
                                           AffineTransform newTX)

  Sets the transform of the specified glyph within this `GlyphVector`. The transform is relative to the glyph position. A `null` argument for `newTX` indicates that no special transform is applied for the specified glyph. This method can be used to rotate, mirror, translate and scale the glyph. Adding a transform can result in signifant performance changes.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector`
    `newTX` - the new transform of the glyph at `glyphIndex`
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`
  See Also:
    `getGlyphTransform(int)`

### getLayoutFlags

    public int getLayoutFlags()

  Returns flags describing the global state of the GlyphVector. Flags not described below are reserved. The default implementation returns 0 (meaning false) for the position adjustments, transforms, rtl, and complex flags. Subclassers should override this method, and make sure it correctly describes the GlyphVector and corresponds to the results of related calls.

  Returns:
    an int containing the flags describing the state
  Since:
    1.4
  See Also:
    `FLAG_HAS_POSITION_ADJUSTMENTS`, `FLAG_HAS_TRANSFORMS`, `FLAG_RUN_RTL`, `FLAG_COMPLEX_GLYPHS`, `FLAG_MASK`

### getGlyphPositions

    public abstract float[] getGlyphPositions(int beginGlyphIndex,
                                              int numEntries,
                                              float[] positionReturn)

  Returns an array of glyph positions for the specified glyphs. This method is used for convenience and performance when processing glyph positions. If no array is passed in, a new array is created. Even numbered array entries beginning with position zero are the X coordinates of the glyph numbered `beginGlyphIndex + position/2`. Odd numbered array entries beginning with position one are the Y coordinates of the glyph numbered `beginGlyphIndex + (position-1)/2`. If `beginGlyphIndex` equals the number of of glyphs in this `GlyphVector`, this method gets the position after the last glyph and this position is used to define the advance of the entire `GlyphVector`.

  Parameters:
    `beginGlyphIndex` - the index at which to begin retrieving glyph positions
    `numEntries` - the number of glyphs to retrieve
    `positionReturn` - the array that receives the glyph positions and is then returned.
  Returns:
    an array of glyph positions specified by `beginGlyphIndex` and `numEntries`.
  Throws:
    `IllegalArgumentException` - if `numEntries` is less than 0
    `IndexOutOfBoundsException` - if `beginGlyphIndex` is less than 0
    `IndexOutOfBoundsException` - if the sum of `beginGlyphIndex` and `numEntries` is greater than the number of glyphs in this `GlyphVector` plus one

### getGlyphLogicalBounds

    public abstract Shape getGlyphLogicalBounds(int glyphIndex)

  Returns the logical bounds of the specified glyph within this `GlyphVector`. These logical bounds have a total of four edges, with two edges parallel to the baseline under the glyph's transform and the other two edges are shared with adjacent glyphs if they are present. This method is useful for hit-testing of the specified glyph, positioning of a caret at the leading or trailing edge of a glyph, and for drawing a highlight region around the specified glyph.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector` that corresponds to the glyph from which to retrieve its logical bounds
  Returns:
    a `Shape` that is the logical bounds of the glyph at the specified `glyphIndex`.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`
  See Also:
    `getGlyphVisualBounds(int)`

### getGlyphVisualBounds

    public abstract Shape getGlyphVisualBounds(int glyphIndex)

  Returns the visual bounds of the specified glyph within the `GlyphVector`. The bounds returned by this method is positioned around the origin of each individual glyph.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector` that corresponds to the glyph from which to retrieve its visual bounds
  Returns:
    a `Shape` that is the visual bounds of the glyph at the specified `glyphIndex`.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`
  See Also:
    `getGlyphLogicalBounds(int)`

### getGlyphPixelBounds

    public Rectangle getGlyphPixelBounds(int index,
                                         FontRenderContext renderFRC,
                                         float x,
                                         float y)

  Returns the pixel bounds of the glyph at index when this `GlyphVector` is rendered in a `Graphics` with the given `FontRenderContext` at the given location. The renderFRC need not be the same as the `FontRenderContext` of this `GlyphVector`, and can be null. If it is null, the `FontRenderContext` of this `GlyphVector` is used. The default implementation returns the visual bounds of the glyph, offset to x, y and rounded out to the next integer value, and ignores the FRC. Subclassers should override this method.

  Parameters:
    `index` - the index of the glyph.
    `renderFRC` - the `FontRenderContext` of the `Graphics`.
  Returns:
    a `Rectangle` bounding the pixels that would be affected.
  Since:
    1.4

### getGlyphMetrics

    public abstract GlyphMetrics getGlyphMetrics(int glyphIndex)

  Returns the metrics of the glyph at the specified index into this `GlyphVector`.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector` that corresponds to the glyph from which to retrieve its metrics
  Returns:
    a `GlyphMetrics` object that represents the metrics of the glyph at the specified `glyphIndex` into this `GlyphVector`.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`

### getGlyphJustificationInfo

    public abstract GlyphJustificationInfo getGlyphJustificationInfo(int glyphIndex)

  Returns the justification information for the glyph at the specified index into this `GlyphVector`.

  Parameters:
    `glyphIndex` - the index into this `GlyphVector` that corresponds to the glyph from which to retrieve its justification properties
  Returns:
    a `GlyphJustificationInfo` object that represents the justification properties of the glyph at the specified `glyphIndex` into this `GlyphVector`.
  Throws:
    `IndexOutOfBoundsException` - if `glyphIndex` is less than 0 or greater than or equal to the number of glyphs in this `GlyphVector`

### equals

    public abstract boolean equals(GlyphVector set)

  Tests if the specified `GlyphVector` exactly equals this `GlyphVector`.

  Parameters:
    `set` - the specified `GlyphVector` to test
  Returns:
    `true` if the specified `GlyphVector` equals this `GlyphVector`; `false` otherwise.

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