Bug 802: Graph TextRenderer Performance Part-1 (incomplete, rendering artifacts)

Strategy Change:
  - Font.Glyph itself holds it's OutlineShape
    with it's default scaling.
    Triangulation is done only once per glyph!

  - A CharSequence produces a Region
    by translating and scaling each Glyphs's OutlineShape.
    This removes the need for re-triangulate - see above.
    See: TextRendererUtil

  - The indices of re-added Triangles are
    offset to the new vertices (FIXME, seems not be be accurate yet).

  - OutlineShape's vertices and triangles are reused if 'clean'.

  - Simplified code

  - Reduced copies

API Changes:
  - OutlineShape, Region, ...: See above

  - Removed TextRenderer, GlyphShape and GlyphString: Redundant

  - Added TextRendererUtil to produce the Region from CharSequence

Result:
  - Over 600 fps while changing text for each frame.
    Previously only ~60fps max.

TODO:
  - Region shall not hold the triangles itself,
    but the indices instead.
    This will remove the need to swizzle w/ vertices in the Region Renderer impl
    and easies reusage of OutlineShapes.

1 files changed, 6 insertions, 3 deletions

diff --git a/src/jogl/classes/com/jogamp/graph/geom/Outline.java b/src/jogl/classes/com/jogamp/graph/geom/Outline.java
index 77a318078..26eba2741 100644
--- a/src/jogl/classes/com/jogamp/graph/geom/Outline.java
+++ b/src/jogl/classes/com/jogamp/graph/geom/Outline.java
@@ -156,17 +156,20 @@ public class Outline implements Cloneable, Comparable<Outline> {
      * equal to the first vertex. If not Equal adds a
      * vertex at the end to the list.
      * @param closed
+     * @return true if closing performed, otherwise false for NOP
      */
-    public final void setClosed(boolean closed) {
+    public final boolean setClosed(boolean closed) {
         this.closed = closed;
         if( closed && !isEmpty() ) {
-            Vertex first = vertices.get(0);
-            Vertex last = getLastVertex();
+            final Vertex first = vertices.get(0);
+            final Vertex last = getLastVertex();
             if(!VectorUtil.checkEquality(first.getCoord(), last.getCoord())){
                 Vertex v = first.clone();
                 vertices.add(v);
+                return true;
             }
         }
+        return false;
     }
 
     /** Compare two outlines with Bounding Box area