/*===========================================================================*\
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*                              OpenFlipper                                   *
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/*===========================================================================*\
*                                                                            *
*   $Revision$                                                       *
*   $LastChangedBy$                                                *
*   $Date$                     *
*                                                                            *
\*===========================================================================*/


#include <ACG/GL/acg_glew.hh>
#include "PostProcessorInterface.hh"



PostProcessorInput::PostProcessorInput( GLuint _colTex, GLuint _depthTex, int _width, int _height) :
  colorTex_(_colTex), depthTex_(_depthTex), width(_width), height(_height), sampleCount_(0), texfmt_(0)
{
  view_.identity(); 
  proj_.identity();
  depthRange_[0] = 0.0; depthRange_[1] = 1.0f;
}


void PostProcessorInput::bindColorTex( int _texSlot /*= 0*/ ) const
{
  glActiveTexture(GL_TEXTURE0 + _texSlot);
  glBindTexture(sampleCount_ ? GL_TEXTURE_2D_MULTISAMPLE : GL_TEXTURE_2D, colorTex_);
}

void PostProcessorInput::bindDepthTex( int _texSlot /*= 0*/ ) const
{
  glActiveTexture(GL_TEXTURE0 + _texSlot);
  glBindTexture(sampleCount_ ? GL_TEXTURE_2D_MULTISAMPLE : GL_TEXTURE_2D, depthTex_);
}


PostProcessorOutput::PostProcessorOutput( GLuint _fbo /*= 0*/, GLuint _drawBuffer /*= 0*/, int _width /*= 0*/, int _height /*= 0*/, const GLint* _viewport /*= 0*/ ) : fbo_(_fbo), drawBuffer_(_drawBuffer), width(_width), height(_height)
{
  if (_viewport)
  {
    viewport_[0] = _viewport[0];
    viewport_[1] = _viewport[1];
    viewport_[2] = _viewport[2];
    viewport_[3] = _viewport[3];
  }
  else
  {
    viewport_[0] = viewport_[1] = 0;
    viewport_[2] = _width; 
    viewport_[3] = _height;
  }
}

void PostProcessorOutput::bind() const
{
  glBindFramebuffer(GL_FRAMEBUFFER, fbo_);
  glDrawBuffer(drawBuffer_);
  glViewport(viewport_[0], viewport_[1], viewport_[2], viewport_[3]);
}