Posted by phil1234 on Oct 17, 2016; 2:44pm
URL: https://forum.jogamp.org/FBO-s-I-cant-make-render-to-depth-buffer-work-tp4037322.html

Hi,

I am getting insane trying to make this work

the point is to get the depth buffer values (with FBOs) for later post processing in a shader

once I add a depth texture, the framebuffer gets corrupted, and I really dont understand what's going on

some say to use render buffer, some say I should use textures instead

plz healp

    public void createFrameBuffer(GL2ES2 gl,int width,int height,SceneGraph frameBufferSceneGraph,boolean depthBuffer)
    {
        this.frameBufferSceneGraph=frameBufferSceneGraph;

        frameBufferObject = genFBO(gl);
        gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, frameBufferObject);

        Texture frameBufferTexture=material.getDiffuseTexture();
        frameBufferTexture.bind(gl);
        gl.glFramebufferTexture2D(GL.GL_FRAMEBUFFER, GL.GL_COLOR_ATTACHMENT0, GL.GL_TEXTURE_2D, frameBufferTexture.getTextureObject(), 0);
       
        if(depthBuffer)
        {
            depthBufferTexture=Tools.createEmptyTexture(gl,frameBufferTexture.getWidth(),frameBufferTexture.getHeight(),Color.yellow);
            depthBufferTexture.bind(gl);
            gl.glFramebufferTexture2D(GL.GL_FRAMEBUFFER, GL.GL_DEPTH_ATTACHMENT, GL.GL_TEXTURE_2D, depthBufferTexture.getTextureObject(), 0);
        }

        gl.glDrawBuffers(1,new int[]{GL.GL_COLOR_ATTACHMENT0},0);
       
        if (gl.glCheckFramebufferStatus(GL.GL_FRAMEBUFFER) != GL.GL_FRAMEBUFFER_COMPLETE)
            System.err.println("Error! FrameBuffer is not complete");
       
        gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, 0);        
        //System.out.println("frameBufferObject: "+frameBufferObject+" renderBuffer:"+renderBuffer);
    }


thanks