Refactor: Public *Renderer / Unify Region Demos / Using own Screenshot (non AWT, plain GL2ES2)

Refactor: Public *Renderer
- Sharing common base abstract class Renderer.java
- Having public abstract classes RegionRenderer and TextRenderer
- Implementation non public, accessed via factory

- + shared code
- + clean API (same stuff)

Unify Region Demos

- reduced code / path, sharing common demo/test features Text/Region

Using own Screenshot (non AWT, plain GL2ES2)

- Remove AWT dependency
- Allow GL2ES2 screenshots
- Less complex

1 files changed, 161 insertions, 0 deletions

diff --git a/src/com/jogamp/graph/curve/opengl/Renderer.java b/src/com/jogamp/graph/curve/opengl/Renderer.java
new file mode 100644
index 000000000..a1755e003
--- /dev/null
+++ b/src/com/jogamp/graph/curve/opengl/Renderer.java
@@ -0,0 +1,161 @@
+package com.jogamp.graph.curve.opengl;
+
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GLUniformData;
+import javax.media.opengl.fixedfunc.GLMatrixFunc;
+
+import jogamp.opengl.Debug;
+
+import com.jogamp.graph.curve.Region;
+import com.jogamp.graph.geom.Vertex;
+import com.jogamp.graph.geom.opengl.SVertex;
+import com.jogamp.opengl.util.PMVMatrix;
+import com.jogamp.opengl.util.glsl.ShaderState;
+
+public abstract class Renderer {
+    protected static final boolean DEBUG = Debug.debug("CurveRenderer");
+
+    protected abstract boolean initImpl(GL2ES2 gl);
+    
+    protected abstract void disposeImpl(GL2ES2 gl);
+   
+    /** 
+     * Flushes all cached data
+     */
+    public abstract void flushCash();
+    
+    public abstract float getAlpha();
+
+    public abstract void setAlpha(GL2ES2 gl, float alpha_t);
+
+    public abstract void setColor(GL2ES2 gl, float r, float g, float b);
+
+    protected final Vertex.Factory<? extends Vertex> pointFactory;    
+    protected ShaderState st = new ShaderState();
+    protected PMVMatrix pmvMatrix = new PMVMatrix();
+    protected GLUniformData mgl_PMVMatrix;
+    protected int regionType = Region.SINGLE_PASS;
+    protected int vp_width = 0;
+    protected int vp_height = 0;
+    
+    private boolean vboSupported = false; 
+    private boolean initialized = false;
+    
+    protected Renderer(Vertex.Factory<? extends Vertex> factory, int type) {
+        this.regionType = type;
+        this.pointFactory = (null != factory) ? factory : SVertex.factory();        
+    }
+    
+    public Vertex.Factory<? extends Vertex> getFactory() { return pointFactory; }
+    
+    public final boolean isInitialized() { return initialized; }
+    
+    public final boolean isVBOSupported() { return vboSupported; }
+    
+    public final int getWidth() { return vp_width; }
+    public final int getHeight() { return vp_height; }
+    
+    /** 
+     * Initialize shaders and bindings for GPU based rendering. 
+     * Leaves the renderer enabled, ie ShaderState on.
+     *  
+     * @param gl the current GL state
+     * @return true if succeeded, false otherwise
+     */
+    public boolean init(GL2ES2 gl) {
+        if(initialized){
+            if(DEBUG) {
+                System.err.println("TextRenderer: Already initialized!");
+            }
+            return true;
+        }
+        vboSupported =  gl.isFunctionAvailable("glGenBuffers") &&
+                        gl.isFunctionAvailable("glBindBuffer") &&
+                        gl.isFunctionAvailable("glBufferData") &&
+                        gl.isFunctionAvailable("glDrawElements") &&
+                        gl.isFunctionAvailable("glVertexAttribPointer") &&
+                        gl.isFunctionAvailable("glDeleteBuffers");
+    
+        if(DEBUG) {
+            System.err.println("TextRendererImpl01: VBO Supported = " + isVBOSupported());
+        }
+        
+        initialized = initImpl(gl);
+        return initialized;
+    }
+
+    public void dispose(GL2ES2 gl) {
+        if(!initialized){
+            if(DEBUG) {
+                System.err.println("TextRenderer: Not initialized!");
+            }
+            return;
+        }
+        disposeImpl(gl);
+        st.destroy(gl);
+        flushCash();        
+        initialized = false;        
+    }
+    
+    public final ShaderState getShaderState() { return st; }
+
+    public final PMVMatrix getMatrix() { return pmvMatrix; }
+
+    public void rotate(GL2ES2 gl, float angle, float x, float y, float z) {
+        pmvMatrix.glRotatef(angle, x, y, z);
+        if(initialized && null != gl && st.inUse()) {
+            st.glUniform(gl, mgl_PMVMatrix);
+        }
+    }
+
+    public void translate(GL2ES2 gl, float x, float y, float z) {
+        pmvMatrix.glTranslatef(x, y, z);
+        if(initialized && null != gl && st.inUse()) {
+            st.glUniform(gl, mgl_PMVMatrix);
+        }
+    }
+
+    public void resetModelview(GL2ES2 gl) {
+        pmvMatrix.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);
+        pmvMatrix.glLoadIdentity();
+        if(initialized && null != gl && st.inUse()) {
+            st.glUniform(gl, mgl_PMVMatrix);
+        }
+    }
+
+    public void updateMatrix(GL2ES2 gl) {
+        if(initialized && null != gl && st.inUse()) {
+            st.glUniform(gl, mgl_PMVMatrix);
+        }
+    }
+
+    public boolean reshapePerspective(GL2ES2 gl, float angle, int width, int height, float near, float far) {
+        this.vp_width = width;
+        this.vp_height = height;
+        float ratio = (float)width/(float)height;
+        pmvMatrix.glMatrixMode(GLMatrixFunc.GL_PROJECTION);
+        pmvMatrix.glLoadIdentity();
+        pmvMatrix.gluPerspective(angle, ratio, near, far);
+        
+        if(initialized && null != gl) {
+            st.glUniform(gl, mgl_PMVMatrix);
+        }
+        
+        return true;
+    }
+
+    public boolean reshapeOrtho(GL2ES2 gl, int width, int height, float near, float far) {
+        this.vp_width = width;
+        this.vp_height = height;
+        pmvMatrix.glMatrixMode(GLMatrixFunc.GL_PROJECTION);
+        pmvMatrix.glLoadIdentity();
+        pmvMatrix.glOrthof(0, width, 0, height, near, far);
+        
+        if(initialized && null != gl) {
+            st.glUniform(gl, mgl_PMVMatrix);
+        }
+        
+        return true;        
+    }
+
+}
\ No newline at end of file