Package gov.nasa.worldwind.util

Class TextureAtlas.AtlasBackingStore

  • All Implemented Interfaces:
    com.jogamp.opengl.util.packrect.BackingStoreManager
    Enclosing class:
    TextureAtlas
    protected class TextureAtlas.AtlasBackingStore
extends java.lang.Object
implements com.jogamp.opengl.util.packrect.BackingStoreManager
    Implementation of the JOGL BackingStoreManager interface for texture atlas. This is used by the JOGL RectanglePacker, and delegates calls from a JOGL rectangle packer to methods in this texture atlas.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected AtlasBackingStore()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean additionFailed​(com.jogamp.opengl.util.packrect.Rect cause, int attemptNumber)
      java.lang.Object allocateBackingStore​(int w, int h)
      void beginMovement​(java.lang.Object oldBackingStore, java.lang.Object newBackingStore)
      boolean canCompact()
      void deleteBackingStore​(java.lang.Object backingStore)
      void endMovement​(java.lang.Object oldBackingStore, java.lang.Object newBackingStore)
      void move​(java.lang.Object oldBackingStore, com.jogamp.opengl.util.packrect.Rect oldLocation, java.lang.Object newBackingStore, com.jogamp.opengl.util.packrect.Rect newLocation)
      boolean preExpand​(com.jogamp.opengl.util.packrect.Rect cause, int attemptNumber)

      • Methods inherited from class java.lang.Object

        clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • AtlasBackingStore

        protected AtlasBackingStore()

    • Method Detail

      • allocateBackingStore

        public java.lang.Object allocateBackingStore​(int w,
                                             int h)

        Calls TextureAtlas.createBackingImage(int, int) with the specified width and height.

        Specified by:
        allocateBackingStore in interface com.jogamp.opengl.util.packrect.BackingStoreManager

      • deleteBackingStore

        public void deleteBackingStore​(java.lang.Object backingStore)

        Calls TextureAtlas.disposeBackingImage().

        Specified by:
        deleteBackingStore in interface com.jogamp.opengl.util.packrect.BackingStoreManager

      • canCompact

        public boolean canCompact()

        Returns true. The texture atlas can always attempt to expand or compact.

        Specified by:
        canCompact in interface com.jogamp.opengl.util.packrect.BackingStoreManager

      • preExpand

        public boolean preExpand​(com.jogamp.opengl.util.packrect.Rect cause,
                         int attemptNumber)

        Returns false, indicating that the rectangle packer should just expand. When configured to do so, texture atlas evicts old elements in additionFailed if this texture atlas is full and the addition would otherwise fail.

        Specified by:
        preExpand in interface com.jogamp.opengl.util.packrect.BackingStoreManager

      • additionFailed

        public boolean additionFailed​(com.jogamp.opengl.util.packrect.Rect cause,
                              int attemptNumber)

        If this texture atlas is configured to evicts old elements, this attempts to remove the oldest one then exits, allowing the caller to attempt the addition again. This throws a WWRuntimeException if this texture atlas is not configured to evict old elements, or if there are no more elements to evict.

        Specified by:
        additionFailed in interface com.jogamp.opengl.util.packrect.BackingStoreManager
        Throws:
        WWRuntimeException - if this backing store cannot fit the rectangle in its layout.