Package com.adobe.fontengine.font

Interface ScalerDebugger

public interface ScalerDebugger
Receives events during the process of hinting and rasterizing glyphs. This interface is intended for development purposes only. During the development of Scalers, it is useful to have access to internal data structures. In a typical C/C++ environment, this is achieved with debugging code bracketed by #IFDEF statements. This technique is no available in Java; here is the pattern we follow instead: - this interface is meant to be called by the scalers, so that they can communicate interesting events and values to outside. - scalers have a Scaler.setDebugger(ScalerDebugger) method which can be called by the development environment to provide an implementation of this interface, and therefore receive events. This method typically stores the ScalerDebugger instance in a field, e.g. debugger. - inside a scaler, the typical pattern is at an instrumentation point is: if (ScalerDebugger.debugOn invalid input: '&'invalid input: '&' debugger != null) { this.debugger.foo (...); } Note that all the code related to debugging is protected the static final boolean debugOn. If that constant is false (the normal value for checked-in code and therefore for shipped code), then much of the code related to debugging is eliminated by the compiler, and we are left with a small overhead (a trivial setDebugger method in the scalers, a field, and the class for this interface). During development, one can set this constant to true to get fully functional debugging.

  • Field Details

    • debugOn

      static final boolean debugOn
      Enable or disable debugging support.
      See Also:

  • Method Details

    • ttInterpLog

      void ttInterpLog(String s)

    • cscanCross

      void cscanCross(double x, double y)

    • getCFFOutlineConsumer

      OutlineConsumer2 getCFFOutlineConsumer()

    • unhintedTTOutline

      void unhintedTTOutline(TTOutline outline)

    • hintedTTOutline

      void hintedTTOutline(TTOutline outline)

    • ttScanScanType

      void ttScanScanType(int scanType)

    • ttScanLog

      void ttScanLog(String s)

    • ttScanLine

      void ttScanLine(int x1, int y1, int x2, int y2)

    • ttScanQuadCurve

      void ttScanQuadCurve(int x1, int y1, int x2, int y2, int x3, int y3)

    • ttScanHCross

      void ttScanHCross(int coordOnScanLine, int scanLineCoordI, boolean on)

    • ttScanVCross

      void ttScanVCross(int coordOnScanLine, int scanLineCoordI, boolean on)