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

1 files changed, 385 insertions, 0 deletions

diff --git a/src/com/jogamp/graph/curve/HwRegionRenderer.java b/src/com/jogamp/graph/curve/HwRegionRenderer.java
new file mode 100755
index 000000000..3c3142061
--- /dev/null
+++ b/src/com/jogamp/graph/curve/HwRegionRenderer.java
@@ -0,0 +1,385 @@
+/**

+ * 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 com.jogamp.graph.curve;

+

+import java.nio.FloatBuffer;

+import java.util.ArrayList;

+import java.util.HashMap;

+import java.util.Iterator;

+

+import javax.media.opengl.GL2ES2;

+import javax.media.opengl.GLAutoDrawable;

+import javax.media.opengl.GLContext;

+import javax.media.opengl.GLException;

+import javax.media.opengl.GLUniformData;

+import javax.media.opengl.fixedfunc.GLMatrixFunc;

+

+import com.jogamp.graph.geom.Triangle;

+import com.jogamp.graph.geom.PointTex;

+

+import jogamp.opengl.Debug;

+import com.jogamp.opengl.util.PMVMatrix;

+import com.jogamp.opengl.util.glsl.ShaderCode;

+import com.jogamp.opengl.util.glsl.ShaderProgram;

+import com.jogamp.opengl.util.glsl.ShaderState;

+

+public class HwRegionRenderer {

+	protected static final boolean DEBUG = Debug.debug("RegionRenderer");

+	

+	private ShaderState st;

+	private PMVMatrix pmvMatrix = new PMVMatrix();

+	

+	/**Sharpness is equivalent to the value of t value of texture coord

+	 * on the off-curve vertex. The high value of sharpness will 

+	 * result in high curvature.

+	 */

+	private float sharpness = 0.5f;

+	private float alpha = 1.0f;

+	private float strength = 3.0f;

+	private boolean initialized = false;

+	

+	private int regionType = Region.SINGLE_PASS;

+	

+	private GLContext context;

+	private FloatBuffer color = FloatBuffer.allocate(3);

+	private HashMap<Integer, Region> regions = new HashMap<Integer, Region>();

+

+	/** Create a Hardware accelerated Region Renderer

+	 * @param context OpenGL rendering context

+	 * @param factory optional Point.Factory for PointTex construction. Default is Vertex.Factory.

+	 */

+	public HwRegionRenderer(GLContext context) {

+		this.context = context;

+		init(context, 0.5f);

+	}

+	/** Create a Hardware accelerated Region Renderer

+	 * @param context OpenGL rendering context

+	 * @param type region type (single or multipass)

+	 */

+	public HwRegionRenderer(GLContext context, int type) {

+		this.context = context;

+		this.regionType = type;

+		init(context, 0.5f);

+	}

+	

+	private boolean init(GLContext context, float sharpvalue){

+		if(initialized){

+			if(DEBUG) {

+				System.err.println("HWRegionRenderer: Already initialized!");

+			}

+			return true;

+		}

+		sharpness = sharpvalue;

+		

+		GL2ES2 gl = context.getGL().getGL2ES2();

+		

+		boolean VBOsupported = gl.isFunctionAvailable("glGenBuffers") &&

+			gl.isFunctionAvailable("glBindBuffer") &&

+			gl.isFunctionAvailable("glBufferData") &&

+			gl.isFunctionAvailable("glDrawElements") &&

+			gl.isFunctionAvailable("glVertexAttribPointer") &&

+			gl.isFunctionAvailable("glDeleteBuffers");

+		

+		if(DEBUG) {

+			System.err.println("HWRegionRenderer: VBO Supported = " + VBOsupported);

+		}

+		

+		if(!VBOsupported){

+			return false;

+		}

+		

+		gl.setSwapInterval(1);

+		

+		gl.glEnable(GL2ES2.GL_BLEND);

+		gl.glBlendFunc(GL2ES2.GL_SRC_ALPHA, GL2ES2.GL_ONE_MINUS_SRC_ALPHA);

+		

+		initShader(gl);

+		

+		st.glUseProgram(gl, true);

+

+		pmvMatrix.glMatrixMode(GLMatrixFunc.GL_PROJECTION);

+		pmvMatrix.glLoadIdentity();

+		pmvMatrix.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);

+		pmvMatrix.glLoadIdentity();

+		

+		pmvMatrix.glMatrixMode(GLMatrixFunc.GL_PROJECTION);

+		pmvMatrix.glLoadIdentity();

+		resetMatrix();

+

+		if(!st.glUniform(gl, new GLUniformData("mgl_PMVMatrix", 4, 4, pmvMatrix.glGetPMvMatrixf()))) {

+			if(DEBUG){

+				System.err.println("Error setting PMVMatrix in shader: "+st);

+			}

+			return false;

+		}

+		if(!st.glUniform(gl, new GLUniformData("p1y", sharpness))) {

+			if(DEBUG){

+				System.err.println("Error setting sharpness in shader: "+st);

+			}

+			return false;

+		}

+		if(!st.glUniform(gl, new GLUniformData("g_alpha", alpha))) {

+			if(DEBUG){

+				System.err.println("Error setting global alpha in shader: "+st);

+			}

+			return false;

+		}

+		if(!st.glUniform(gl, new GLUniformData("g_color", 3, color))) {

+			if(DEBUG){

+				System.err.println("Error setting global color in shader: "+st);

+			}

+			return false;

+		}

+		if(!st.glUniform(gl, new GLUniformData("a_strength", strength))) {

+			System.err.println("Error setting antialias strength in shader: "+st);

+		}

+		st.glUseProgram(gl, false);

+		

+		if(DEBUG) {

+			System.err.println("HWRegionRenderer initialized: " + Thread.currentThread()+" "+st);

+		}

+		initialized = true;

+		return true;

+	}

+	

+	public float getAlpha() {

+		return alpha;

+	}

+	public void setAlpha(float alpha_t) {

+		alpha = alpha_t;

+	}

+	

+	public void setColor(float r, float g, float b){

+		color.put(r);

+		color.put(g);

+		color.put(b);

+		color.rewind();

+	}

+	

+	public void rotate(float angle, float x, float y, float z){

+		pmvMatrix.glRotatef(angle, x, y, z);

+	}

+	public void translate(float x, float y, float z){

+		pmvMatrix.glTranslatef(x, y, z);

+	}

+	

+	public  void resetMatrix(){

+		pmvMatrix.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);

+		pmvMatrix.glLoadIdentity();

+	}

+	

+	/**

+	 * @param drawable

+	 * @param angle

+	 * @param ratio

+	 * @param near

+	 * @param far

+	 * @return

+	 */

+	public boolean reshape(GLAutoDrawable drawable, float angle, float ratio, float near, float far){

+		pmvMatrix.glMatrixMode(GLMatrixFunc.GL_PROJECTION);

+		pmvMatrix.glLoadIdentity();

+		pmvMatrix.gluPerspective(angle, ratio, near, far);

+		

+		if(null==st) {

+			if(DEBUG){

+				System.err.println("HWRegionRenderer: Shader State is null, or not");

+			}

+			return false;

+		}

+		GL2ES2 gl = drawable.getGL().getGL2ES2();

+

+		st.glUseProgram(gl, true);

+		GLUniformData ud = st.getUniform("mgl_PMVMatrix");

+		if(null!=ud) {

+			st.glUniform(gl, ud);

+		} 

+		st.glUseProgram(gl, false);

+		return true;

+	}

+

+	private void initShader(GL2ES2 gl) {

+		ShaderCode rsVp = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, 1, HwRegionRenderer.class,

+				"shader", "shader/bin", "curverenderer");

+		ShaderCode rsFp = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, 1, HwRegionRenderer.class,

+				"shader", "shader/bin", "curverenderer");

+

+		ShaderProgram sp = new ShaderProgram();

+		sp.add(rsVp);

+		sp.add(rsFp);

+

+		if(!sp.link(gl, System.err)) {

+			throw new GLException("HWRegionRenderer: Couldn't link program: "+sp);

+		}

+

+		st = new ShaderState();

+		st.attachShaderProgram(gl, sp);

+		gl.glBindAttribLocation(sp.id(), 0, "v_position");

+		gl.glBindAttribLocation(sp.id(), 1, "texCoord");

+	}

+	

+	private Region createRegion(OutlineShape outlineShape) {

+		Region region = RegionFactory.create(context, st, regionType);

+		

+		outlineShape.transformOutlines(OutlineShape.QUADRATIC_NURBS);

+		

+		ArrayList<Triangle<PointTex>> triangles = (ArrayList<Triangle<PointTex>>) outlineShape.triangulate(sharpness);

+		ArrayList<PointTex> vertices = (ArrayList<PointTex>) outlineShape.getVertices();

+		region.addVertices(vertices);

+		region.addTriangles(triangles);

+		

+		region.update();

+		return region;

+	}

+	

+	private Region createRegion(OutlineShape[] outlineShapes) {

+		Region region = RegionFactory.create(context, st, regionType);

+		

+		int numVertices = region.getNumVertices();

+		

+		for(OutlineShape outlineShape:outlineShapes){

+			outlineShape.transformOutlines(OutlineShape.QUADRATIC_NURBS);

+

+			ArrayList<Triangle<PointTex>> triangles = outlineShape.triangulate(sharpness);

+			region.addTriangles(triangles);

+			

+			ArrayList<PointTex> vertices = outlineShape.getVertices();

+			for(PointTex vert:vertices){

+				vert.setId(numVertices++);

+			}

+			region.addVertices(vertices);

+		}

+		

+		region.update();

+		return region;

+	}

+	

+	

+	/** Render outline in 3D space at the position provided

+	 *  the triangles of the shapes will be generated, if not yet generated

+	 * @param outlineShape the OutlineShape to Render.

+	 * @param position the initial translation of the outlineShape. 

+	 * @throws Exception if HwRegionRenderer not initialized

+	 */

+	public void renderOutlineShape(OutlineShape outlineShape, float[] position) throws Exception{

+		if(!initialized){

+			throw new Exception("HWRegionRenderer: not initialized!");

+		}

+		int hashCode = getHashCode(outlineShape);

+		Region region = regions.get(hashCode);

+		

+		if(null == region) {

+			region = createRegion(outlineShape);

+			regions.put(hashCode, region);

+		}

+		

+		GL2ES2 gl = context.getGL().getGL2ES2();

+		st.glUseProgram(gl, true);

+		GLUniformData ud = st.getUniform("mgl_PMVMatrix");

+		if(null!=ud) {

+			st.glUniform(gl, ud);

+		} 

+		if(!st.glUniform(gl, new GLUniformData("g_alpha", alpha))) {

+			System.err.println("Error setting global alpha in shader: "+st);

+		}	

+		GLUniformData gcolorUD = st.getUniform("g_color");

+		if(null!=gcolorUD) {

+			st.glUniform(gl, gcolorUD);

+		} 

+		if(!st.glUniform(gl, new GLUniformData("a_strength", strength))) {

+			System.err.println("Error setting antialias strength in shader: "+st);

+		}

+		

+		region.render(null, 0, 0, 0);

+		st.glUseProgram(gl, false);

+	}

+	

+	/** Render a list of Outline shapes combined in one region

+	 *  at the position provided the triangles of the 

+	 *  shapes will be generated, if not yet generated

+	 * @param outlineShapes the list of OutlineShapes to Render.

+	 * @param position the initial translation of the outlineShapes.

+	 * @throws Exception if HwRegionRenderer not initialized

+	 */

+	public void renderOutlineShapes(OutlineShape[] outlineShapes, float[] position) throws Exception{

+		if(!initialized){

+			throw new Exception("HWRegionRenderer: not initialized!");

+		}

+		

+		int hashCode = getHashCode(outlineShapes);

+		Region region = regions.get(hashCode);

+		

+		if(null == region) {

+			region = createRegion(outlineShapes);

+			regions.put(hashCode, region);

+		}

+		

+		GL2ES2 gl = context.getGL().getGL2ES2();

+		st.glUseProgram(gl, true);

+		GLUniformData ud = st.getUniform("mgl_PMVMatrix");

+		if(null!=ud) {

+			st.glUniform(gl, ud);

+		} 

+		if(!st.glUniform(gl, new GLUniformData("g_alpha", alpha))) {

+			System.err.println("Error setting global alpha in shader: "+st);

+		}	

+		GLUniformData gcolorUD = st.getUniform("g_color");

+		if(null!=gcolorUD) {

+			st.glUniform(gl, gcolorUD);

+		} 

+		if(!st.glUniform(gl, new GLUniformData("a_strength", strength))) {

+			System.err.println("Error setting antialias strength in shader: "+st);

+		}

+		region.render(null, 0, 0, 0);

+		st.glUseProgram(gl, false);

+	}

+	

+	private int getHashCode(OutlineShape outlineShape){

+		return outlineShape.hashCode();

+	}

+	

+	private int getHashCode(OutlineShape[] outlineShapes){

+		int hashcode = 0;

+		for(OutlineShape outlineShape:outlineShapes){

+			hashcode += getHashCode(outlineShape);

+		}

+		return hashcode;

+	}

+

+	/** Clears the cached string curves

+	 *  and destorys underlying buffers

+	 */

+	public void clearCached() {

+		Iterator<Region> iterator = regions.values().iterator();

+		while(iterator.hasNext()){

+			Region region = iterator.next();

+			region.destroy();

+		}

+		regions.clear();

+	}

+}