Addd Missing files

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@8082 383ad7c9-94d9-4d36-a494-682f7c89f535

ACG/GL/FBO.cc

+//=============================================================================
+//
+//  CLASS FBO - IMPLEMENTATION
+//
+//=============================================================================
+
+//== INCLUDES =================================================================
+
+#include "FBO.hh"
+
+
+//== NAMESPACES ===============================================================
+
+namespace ACG
+{
+
+//== IMPLEMENTATION ==========================================================
+
+FBO::
+~FBO()
+{
+   // delete framebuffer object
+    glDeleteFramebuffersEXT( 1, &fbo_ );
+
+    // delete renderbuffers
+    glDeleteRenderbuffersEXT(1, &depthbuffer_);
+    glDeleteRenderbuffersEXT(1, &stencilbuffer_); 
+}
+
+//-----------------------------------------------------------------------------
+
+void
+FBO::
+init()
+{
+    // Create framebuffer object
+    if ( !GLEW_EXT_framebuffer_object )
+    {
+        std::cout << "Framebuffer object not supported! " << std::endl;
+        exit( 1 );
+    }
+
+    glGenFramebuffersEXT( 1, &fbo_ );
+
+    // check status
+    checkFramebufferStatus();
+
+    // unbind fbo
+    unbind();
+}
+
+//-----------------------------------------------------------------------------
+
+void
+FBO::
+attachTexture2D( GLenum _attachment, GLuint _texture )
+{
+    // bind fbo
+    bind();
+
+    // add texture to frame buffer object
+    glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, _attachment, GL_TEXTURE_2D, _texture, 0 );
+
+    // check status
+    checkFramebufferStatus();
+
+    // unbind fbo
+    unbind();
+}
+
+//-----------------------------------------------------------------------------
+
+void
+FBO::
+addDepthBuffer( GLuint _width, GLuint _height )
+{
+  // create renderbuffer
+  glGenRenderbuffersEXT(1, &depthbuffer_);
+
+  // bind renderbuffer
+  glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, depthbuffer_);
+
+  // malloc
+  glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, _width, _height);
+
+  // attach to framebuffer object
+  if ( bind() )
+     glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depthbuffer_);
+
+  // check status
+  checkFramebufferStatus();
+
+  // normal render mode
+  unbind();
+}
+
+//-----------------------------------------------------------------------------
+
+void
+FBO::
+addStencilBuffer( GLuint _width, GLuint _height )
+{
+  // create renderbuffer
+  glGenRenderbuffersEXT(1, &stencilbuffer_);
+
+  // bind renderbuffer
+  glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, stencilbuffer_);
+
+  // malloc
+  glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_STENCIL_INDEX, _width, _height);
+
+  // attach to framebuffer object
+  if ( bind() )
+     glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, stencilbuffer_);
+
+  // check status
+  checkFramebufferStatus();
+
+  // normal render mode
+  unbind();
+}
+
+
+
+//-----------------------------------------------------------------------------
+
+bool
+FBO::
+bind()
+{
+    if ( !fbo_ ) 
+       return false;
+
+    // bind framebuffer object
+    glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, fbo_ );
+
+    return true;
+}
+
+//-----------------------------------------------------------------------------
+
+void
+FBO::
+unbind()
+{
+    //set to normal rendering
+    glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, 0 );
+}
+
+//-----------------------------------------------------------------------------
+
+bool
+FBO::
+checkFramebufferStatus()
+{
+    GLenum status;
+    status = ( GLenum ) glCheckFramebufferStatusEXT( GL_FRAMEBUFFER_EXT );
+    std::cout << "Framebuffer status: " << status << std::endl;
+    switch ( status )
+    {
+        case GL_FRAMEBUFFER_COMPLETE_EXT:
+            std::cout << "Framebuffer ok\n";
+            break;
+        case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
+            std::cout << " Framebuffer incomplete attachment\n";
+            break;
+        case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
+            std::cout << "Unsupported framebuffer format\n";
+            break;
+        case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
+            std::cout << "Framebuffer incomplete, missing attachment\n";
+            break;
+        case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
+            std::cout <<  "Framebuffer incomplete, attached images must have same dimensions\n";
+            break;
+        case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
+            std::cout << "Framebuffer incomplete, attached images must have same format\n";
+            break;
+        case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
+            std::cout << "Framebuffer incomplete, missing draw buffer\n";
+            break;
+        case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
+            std::cout << "Framebuffer incomplete, missing read buffer\n";
+            break;
+        default:
+            std::cout << "Unhandled case\n";
+            break;
+    }
+
+    return ( status == GL_FRAMEBUFFER_COMPLETE_EXT );
+}
+
+
+//=============================================================================
+} // namespace ACG
+//=============================================================================

ACG/GL/FBO.hh

+//=============================================================================
+//
+//  CLASS FBO
+//
+// Author:  Dominik Sibbing <sibbing@cs.rwth-aachen.de>
+//
+// Version: $Revision: 1$
+// Date:    $Date: 2008$
+//
+//=============================================================================
+
+
+#ifndef ACG_FBO_HH
+#define ACG_FBO_HH
+
+
+//== INCLUDES =================================================================
+
+#include <iostream>
+#include <stdlib.h>
+
+#include <ACG/GL/gl.hh>
+
+//== FORWARDDECLARATIONS ======================================================
+
+//== NAMESPACES ===============================================================
+
+namespace ACG {
+
+//== CLASS DEFINITION =========================================================
+
+
+/** \class FBO FBO.hh <ACG/.../FBO.hh>
+
+    Brief Description.
+  
+    A more elaborate description follows.
+*/
+class FBO
+{
+public:
+   
+  /// Default constructor
+  FBO() {}
+  
+  /// Destructor
+  ~FBO();
+  
+  /// function to generate the framebuffer object
+  void init();
+  
+  /// function to attach a texture to fbo
+  void attachTexture2D( GLenum _attachment, GLuint _texture );
+
+  /// function to add a depth buffer to the fbo
+  void addDepthBuffer( GLuint _width, GLuint _height );
+  
+  /// function to add a stencil buffer to the fbo
+  void addStencilBuffer( GLuint _width, GLuint _height );
+  
+  /// bind the fbo and sets it as rendertarget
+  bool bind();
+  
+  /// unbind fbo, go to normal rendering mode 
+  void unbind();
+  
+  /// function to check the framebuffer status
+  bool checkFramebufferStatus();
+
+private:
+
+  /// handle of frame buffer object
+  GLuint fbo_;
+
+  /// depthbuffer
+  GLuint depthbuffer_;
+  
+  /// stencilbuffer
+  GLuint stencilbuffer_;
+  
+
+};
+
+
+//=============================================================================
+} // namespace ACG
+//=============================================================================
+#endif // ACG_FBO_HH defined
+//=============================================================================
+