Add initial GPU based curve rendering implementation, utilizing TTF fonts and manual shapes

1 files changed, 163 insertions, 0 deletions

diff --git a/src/jogamp/graph/curve/text/GlyphString.java b/src/jogamp/graph/curve/text/GlyphString.java
new file mode 100644
index 000000000..d85e59c43
--- /dev/null
+++ b/src/jogamp/graph/curve/text/GlyphString.java
@@ -0,0 +1,163 @@
+/**
+ * Copyright 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.graph.curve.text;
+
+import java.util.ArrayList;
+
+import com.jogamp.graph.geom.plane.AffineTransform;
+import com.jogamp.graph.geom.plane.Path2D;
+import com.jogamp.graph.geom.plane.PathIterator;
+import com.jogamp.graph.geom.Point;
+import com.jogamp.graph.geom.PointTex;
+import com.jogamp.graph.geom.Triangle;
+import com.jogamp.graph.geom.opengl.Vertex;
+
+import javax.media.opengl.GLContext;
+
+
+import com.jogamp.graph.curve.Region;
+import com.jogamp.graph.curve.RegionFactory;
+import com.jogamp.opengl.util.PMVMatrix;
+import com.jogamp.opengl.util.glsl.ShaderState;
+
+public class GlyphString {
+	private final Point.Factory<? extends PointTex> pointFactory;	
+	private ArrayList<GlyphShape> glyphs = new ArrayList<GlyphShape>();
+	private String str = "";
+	private String fontname = "";
+	private Region region;
+	
+	private Vertex origin = new Vertex();
+
+	/** Create a new GlyphString object
+	 * @param fontname the name of the font that this String is
+	 * associated with
+	 * @param str the string object
+	 */
+	public GlyphString(Point.Factory<? extends PointTex> factory, String fontname, String str){
+		pointFactory = factory;
+		this.fontname = fontname;
+		this.str = str;
+	}
+	
+	public final Point.Factory<? extends PointTex> pointFactory() { return pointFactory; }
+	
+	public void addGlyphShape(GlyphShape glyph){
+		glyphs.add(glyph);
+	}
+	public String getString(){
+		return str;
+	}
+
+	/** Creates the Curve based Glyphs from a Font 
+	 * @param paths a list of FontPath2D objects that define the outline
+	 * @param affineTransform a global affine transformation applied to the paths.
+	 */
+	public void createfromFontPath(Path2D[] paths, AffineTransform affineTransform){
+		final int numGlyps = paths.length;
+		for (int index=0;index<numGlyps;index++){
+			if(paths[index] == null){
+				continue;
+			}
+			PathIterator iterator = paths[index].iterator(affineTransform);
+			GlyphShape glyphShape = new GlyphShape(pointFactory, iterator);
+			
+			if(glyphShape.getNumVertices() < 3) {
+				continue;
+			}			
+			addGlyphShape(glyphShape);
+		}
+	}
+	
+	private ArrayList<Triangle<PointTex>> initializeTriangles(float sharpness){
+		ArrayList<Triangle<PointTex>> triangles = new ArrayList<Triangle<PointTex>>();
+		for(GlyphShape glyph:glyphs){
+			ArrayList<Triangle<PointTex>> tris = glyph.triangulate(sharpness);
+			triangles.addAll(tris);
+		}
+		return triangles;
+	}
+	
+	/** Generate a OGL Region to represent this Object.
+	 * @param context the GLContext which the region is defined by.
+	 * @param shaprness the curvature sharpness of the object.
+	 * @param st shader state
+	 */
+	public void generateRegion(GLContext context, float shaprness, ShaderState st, int type){
+		region = RegionFactory.create(context, st, type);
+		region.setFlipped(true);
+		
+		ArrayList<Triangle<PointTex>> tris = initializeTriangles(shaprness);
+		region.addTriangles(tris);
+		
+		int numVertices = region.getNumVertices();
+		for(GlyphShape glyph:glyphs){
+			ArrayList<PointTex> gVertices = glyph.getVertices();
+			for(PointTex vert:gVertices){
+				vert.setId(numVertices++);
+			}
+			region.addVertices(gVertices);
+		}
+		
+		/** initialize the region */
+		region.update();
+	}
+	
+	/** Generate a Hashcode for this object 
+	 * @return a string defining the hashcode
+	 */
+	public String getTextHashCode(){
+		return "" + fontname.hashCode() + str.hashCode();
+	}
+
+	/** Render the Object based using the associated Region
+	 *  previously generated.
+	 */
+	public void renderString3D() {
+		region.render(null, 0, 0, 0);
+	}
+	/** Render the Object based using the associated Region
+	 *  previously generated.
+	 */
+	public void renderString3D(PMVMatrix matrix, int vp_width, int vp_height, int size) {
+		region.render(matrix, vp_width, vp_height, size);
+	}
+	
+	/** Get the Origion of this GlyphString
+	 * @return 
+	 */
+	public PointTex getOrigin() {
+		return origin;
+	}
+
+	/** Destroy the associated OGL objects
+	 */
+	public void destroy(){
+		region.destroy();
+	}
+}