Constructor Detail

• GlyphPositioningState

  public GlyphPositioningState()

  Construct default (reset) glyph positioning state.

• GlyphPositioningState

  public GlyphPositioningState​(GlyphSequence gs,
                               java.lang.String script,
                               java.lang.String language,
                               java.lang.String feature,
                               int fontSize,
                               int[] widths,
                               int[][] adjustments,
                               ScriptContextTester sct)

  Construct glyph positioning state.

  Parameters:

  gs - input glyph sequence

  script - script identifier

  language - language identifier

  feature - feature identifier

  fontSize - font size (in micropoints)

  widths - array of design advancements (in glyph index order)

  adjustments - positioning adjustments to which positioning is applied

  sct - script context tester (or null)

• GlyphPositioningState

  public GlyphPositioningState​(GlyphPositioningState ps)

  Construct glyph positioning state using an existing state object using shallow copy except as follows: input glyph sequence is copied deep except for its characters array.

  Parameters:

  ps - existing positioning state to copy from

Method Detail

• reset

  public GlyphPositioningState reset​(GlyphSequence gs,
                                     java.lang.String script,
                                     java.lang.String language,
                                     java.lang.String feature,
                                     int fontSize,
                                     int[] widths,
                                     int[][] adjustments,
                                     ScriptContextTester sct)

  Reset glyph positioning state.

  Parameters:

  gs - input glyph sequence

  script - script identifier

  language - language identifier

  feature - feature identifier

  fontSize - font size (in micropoints)

  widths - array of design advancements (in glyph index order)

  adjustments - positioning adjustments to which positioning is applied

  sct - script context tester (or null)

• getWidth

  public int getWidth​(int gi)

  Obtain design advancement (width) of glyph at specified index.

  Parameters:

  gi - glyph index

  Returns:

  design advancement, or zero if glyph index is not present

• adjust

  public boolean adjust​(GlyphPositioningTable.Value v)

  Perform adjustments at current position index.

  Parameters:

  v - value containing adjustments

  Returns:

  true if a non-zero adjustment was made

• adjust

  public boolean adjust​(GlyphPositioningTable.Value v,
                        int offset)

  Perform adjustments at specified offset from current position index.

  Parameters:

  v - value containing adjustments

  offset - from current position index

  Returns:

  true if a non-zero adjustment was made

• getAdjustment

  public int[] getAdjustment()

  Obtain current adjustments at current position index.

  Returns:

  array of adjustments (int[4]) at current position

• getAdjustment

  public int[] getAdjustment​(int offset)
                      throws java.lang.IndexOutOfBoundsException

  Obtain current adjustments at specified offset from current position index.

  Parameters:

  offset - from current position index

  Returns:

  array of adjustments (int[4]) at specified offset

  Throws:

  java.lang.IndexOutOfBoundsException - if offset is invalid

• apply

  public boolean apply​(GlyphPositioningSubtable st)

  Apply positioning subtable to current state at current position (only), resulting in the consumption of zero or more input glyphs.

  Parameters:

  st - the glyph positioning subtable to apply

  Returns:

  true if subtable applied, or false if it did not (e.g., its input coverage table did not match current input context)

• apply

  public boolean apply​(GlyphTable.RuleLookup[] lookups,
                       int nig)

  Apply a sequence of matched rule lookups to the nig input glyphs starting at the current position. If lookups are non-null and non-empty, then all input glyphs specified by nig are consumed irregardless of whether any specified lookup applied.

  Parameters:

  lookups - array of matched lookups (or null)

  nig - number of glyphs in input sequence, starting at current position, to which the lookups are to apply, and to be consumed once the application has finished

  Returns:

  true if lookups are non-null and non-empty; otherwise, false

• applyDefault

  public void applyDefault()

  Apply default application semantices; namely, consume one input glyph.

  Overrides:

  applyDefault in class GlyphProcessingState

• setAdjusted

  public void setAdjusted​(boolean adjusted)

  Set adjusted state, used to record effect of non-zero adjustment.

  Parameters:

  adjusted - true if to set adjusted state, otherwise false to clear adjusted state

• getAdjusted

  public boolean getAdjusted()

  Get adjusted state.

  Returns:

  adjusted true if some non-zero adjustment occurred and was recorded by setAdjusted(boolean); otherwise, false.