Class SimpleRasterizer

java.lang.Object
com.esri.core.geometry.SimpleRasterizer
public class SimpleRasterizer extends Object
Simple scanline rasterizer. Caller provides a callback to draw pixels to actual surface.

  • Field Details

  • Constructor Details

    • SimpleRasterizer

      public SimpleRasterizer()

  • Method Details

    • setup

      public void setup(int width, int height, SimpleRasterizer.ScanCallback callback)
      Sets up the rasterizer.

    • getWidth

      public final int getWidth()

    • getHeight

      public final int getHeight()

    • flush

      public final void flush()
      Flushes any cached scans.

    • addTriangle

      public final void addTriangle(double x1, double y1, double x2, double y2, double x3, double y3)
      Adds edges of a triangle.

    • addRing

      public final void addRing(double[] xy)
      Adds edges of the ring to the rasterizer.
      Parameters:
      xy - interleaved coordinates x1, y1, x2, y2,...

    • startAddingEdges

      public final void startAddingEdges()
      Call before starting the edges. For example to render two polygons that consist of a single ring: startAddingEdges(); addRing(...); renderEdges(Rasterizer.EVEN_ODD); addRing(...); renderEdges(Rasterizer.EVEN_ODD); For example to render a polygon consisting of three rings: startAddingEdges(); addRing(...); addRing(...); addRing(...); renderEdges(Rasterizer.EVEN_ODD);

    • renderEdges

      public final void renderEdges(int fillMode)
      Renders all edges added so far, and removes them. Calls startAddingEdges after it's done.
      Parameters:
      fillMode - Fill mode for the polygon fill can be one of two values: EVEN_ODD or WINDING. Note, as any other graphics algorithm, the scan line rasterizer doesn't require polygons to be topologically simple, or have correct ring orientation.

    • addEdge

      public final void addEdge(double x1, double y1, double x2, double y2)
      Add a single edge.
      Parameters:
      x1 -
      y1 -
      x2 -
      y2 -

    • fillEnvelope

      public final void fillEnvelope(Envelope2D envIn)

    • addSegmentStroke

      final boolean addSegmentStroke(double x1, double y1, double x2, double y2, double half_width, boolean skip_short, double[] helper_xy_10_elm)

    • getScanCallback

      public final SimpleRasterizer.ScanCallback getScanCallback()

    • estimateMemorySize

      public long estimateMemorySize()

    • advanceAET_

      private final void advanceAET_()

    • addNewEdgesToAET_

      private final void addNewEdgesToAET_(int y)

    • snap_

      private static int snap_(int x, int mi, int ma)

    • emitScans_

      private final void emitScans_()

    • sortAET_

      private final SimpleRasterizer.Edge sortAET_(SimpleRasterizer.Edge aet)