Added working javax.media.opengl.util.FBObject

git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1721 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 212 insertions, 0 deletions

diff --git a/src/classes/javax/media/opengl/util/FBObject.java b/src/classes/javax/media/opengl/util/FBObject.java
new file mode 100755
index 000000000..867512445
--- /dev/null
+++ b/src/classes/javax/media/opengl/util/FBObject.java
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution 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.
+ * 
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ */
+
+package javax.media.opengl.util;
+
+import javax.media.opengl.*;
+
+public class FBObject {
+    private int fb, fbo_tex, depth_rb, stencil_rb, width, height, vStatus, attr;
+
+    public static final int ATTR_DEPTH   = 1 << 0;
+    public static final int ATTR_STENCIL = 1 << 1;
+
+    public FBObject(int width, int height, int attributes) {
+        this.width = width;
+        this.height = height;
+        this.attr = attributes;
+    }        
+
+
+    public boolean validateStatus(GL gl)
+    {
+        if(!gl.glIsFramebuffer(fb)) {
+            vStatus=-1;
+            return false;
+        }
+        vStatus=gl.glCheckFramebufferStatus(gl.GL_FRAMEBUFFER);
+        //vStatus=gl.glCheckFramebufferStatus(fb);
+
+        switch(vStatus) {
+            case GL.GL_FRAMEBUFFER_COMPLETE:
+                return true;
+            case GL.GL_FRAMEBUFFER_UNSUPPORTED:
+            case GL.GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
+            case GL.GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
+            case GL.GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
+            case GL.GL_FRAMEBUFFER_INCOMPLETE_FORMATS:
+            //case GL2.GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
+            //case GL2.GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
+            //case GL2.GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT:
+            case 0:
+            default:
+                return false;
+        }
+    }
+
+    public String getStatusString()
+    {
+        switch(vStatus) {
+            case -1:
+                return "NOT A FBO";
+            case GL.GL_FRAMEBUFFER_COMPLETE:
+                return "OK";
+            case GL.GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
+                return("GL FBO: incomplete,incomplete attachment\n");
+            case GL.GL_FRAMEBUFFER_UNSUPPORTED:
+                return("GL FBO: Unsupported framebuffer format");
+            case GL.GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
+                return("GL FBO: incomplete,missing attachment");
+            case GL.GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
+                return("GL FBO: incomplete,attached images must have same dimensions");
+            case GL.GL_FRAMEBUFFER_INCOMPLETE_FORMATS:
+                 return("GL FBO: incomplete,attached images must have same format");
+                 /*
+            case GL2.GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
+                return("GL FBO: incomplete,missing draw buffer");
+            case GL2.GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
+                return("GL FBO: incomplete,missing read buffer");
+            case GL2.GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT:
+                return("GL FBO: incomplete, duplicate attachment");
+                */
+            case 0:
+                return("GL FBO: incomplete, implementation fault");
+            default:
+                return("GL FBO: incomplete, implementation ERROR");
+        }
+    }
+
+    public void init(GL gl) {
+        // generate fbo ..
+        int name[] = new int[1];
+
+        gl.glGenFramebuffers(1, name, 0);
+        fb = name[0];
+        System.out.println("fb: "+fb);
+
+        gl.glGenTextures(1, name, 0);
+        fbo_tex = name[0];
+        System.out.println("fbo_tex: "+fbo_tex);
+
+        if(0!=(attr&ATTR_DEPTH)) {
+            gl.glGenRenderbuffers(1, name, 0);
+            depth_rb = name[0];
+            System.out.println("depth_rb: "+depth_rb);
+        } else {
+            depth_rb = 0;
+        }
+        if(0!=(attr&ATTR_STENCIL)) {
+            gl.glGenRenderbuffers(1, name, 0);
+            stencil_rb = name[0];
+            System.out.println("stencil_rb: "+stencil_rb);
+        } else {
+            stencil_rb = 0;
+        }
+
+        // bind fbo ..
+        gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, fb);
+
+        gl.glBindTexture(GL.GL_TEXTURE_2D, fbo_tex);
+        if(gl.isGL2()) { 
+            gl.glTexImage2D(GL.GL_TEXTURE_2D, 0, GL.GL_RGBA8, width, height, 0,
+                            GL2.GL_BGRA, GL2.GL_UNSIGNED_INT_8_8_8_8_REV, null);
+        } else {
+            gl.glTexImage2D(GL.GL_TEXTURE_2D, 0, GL.GL_RGB8, width, height, 0,
+                            GL.GL_RGB, GL.GL_UNSIGNED_BYTE, null);
+        }
+        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
+        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_NEAREST);
+        //gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL2.GL_CLAMP);
+        //gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL2.GL_CLAMP);
+
+
+        // Set up the color buffer for use as a renderable texture:
+        gl.glFramebufferTexture2D(GL.GL_FRAMEBUFFER,
+                                  GL.GL_COLOR_ATTACHMENT0,
+                                  GL.GL_TEXTURE_2D, fbo_tex, 0); 
+
+        if(depth_rb!=0) {
+            // Initialize the depth buffer:
+            gl.glBindRenderbuffer(GL.GL_RENDERBUFFER, depth_rb);
+            gl.glRenderbufferStorage(GL.GL_RENDERBUFFER,
+                                        GL.GL_DEPTH_COMPONENT16, width, height);
+            // Set up the depth buffer attachment:
+            gl.glFramebufferRenderbuffer(GL.GL_FRAMEBUFFER,
+                                            GL.GL_DEPTH_ATTACHMENT,
+                                            GL.GL_RENDERBUFFER, depth_rb);
+        }
+
+        if(stencil_rb!=0) {
+            // Initialize the stencil buffer:
+            gl.glBindRenderbuffer(GL.GL_RENDERBUFFER, stencil_rb);
+            gl.glRenderbufferStorage(GL.GL_RENDERBUFFER,
+                                        GL.GL_STENCIL_INDEX8, width, height);
+            gl.glFramebufferRenderbuffer(GL.GL_FRAMEBUFFER,
+                                            GL.GL_STENCIL_ATTACHMENT,
+                                            GL.GL_RENDERBUFFER, stencil_rb);
+        }
+
+        // Check the FBO for completeness
+        if(validateStatus(gl)) {
+            System.out.println("Framebuffer " + fb + " is complete");
+        } else {
+            System.out.println("Framebuffer " + fb + " is incomplete: status = 0x" + Integer.toHexString(vStatus) + 
+                               " : " + getStatusString());
+        }
+
+        unbind(gl);
+    }
+
+    public void bind(GL gl) {
+        gl.glBindTexture(GL.GL_TEXTURE_2D, fbo_tex);
+        gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, fb); 
+    }
+
+    public void unbind(GL gl) {
+        gl.glBindTexture(GL.GL_TEXTURE_2D, 0);
+        gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, 0);
+    }
+
+    public void use(GL gl) {
+        gl.glBindTexture(GL.GL_TEXTURE_2D, 0);
+        gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, 0);
+        gl.glBindTexture(GL.GL_TEXTURE_2D, fbo_tex); // to use it ..
+    }
+
+    public int getFBName() {
+        return fb;
+    }
+    public int getTextureName() {
+        return fbo_tex;
+    }
+}