PostProcessorAnaglyphPlugin.cc

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#include "PostProcessorAnaglyphPlugin.hh"

#include <ACG/GL/ScreenQuad.hh>
#include <ACG/GL/ShaderCache.hh>

#include <OpenFlipper/BasePlugin/PluginFunctions.hh>
#include <OpenFlipper/common/GlobalOptions.hh>


PostProcessorAnaglyphPlugin::PostProcessorAnaglyphPlugin()
{
}

PostProcessorAnaglyphPlugin::~PostProcessorAnaglyphPlugin()
{
}

QString PostProcessorAnaglyphPlugin::checkOpenGL() {
  if (!ACG::openGLVersion(3, 0))
    return QString("Insufficient OpenGL Version! OpenGL 3.0 or higher required");

  return QString("");
}



QString PostProcessorAnaglyphPlugin::postProcessorName() {
  return QString("AnaglyphStereo");
}


void PostProcessorAnaglyphPlugin::postProcess(ACG::GLState* _glstate, const std::vector<const PostProcessorInput*>& _input, const PostProcessorOutput& _output) {

  if (_input.size() != 2) {
    std::cerr << "PostProcessorAnaglyphPlugin: two input images required!" << std::endl;
    return;
  }

  // ======================================================================================================
  // Fetch shader from cache
  // ======================================================================================================

  QStringList macros;

  if (OpenFlipper::Options::stereoMode () == OpenFlipper::Options::AnaglyphCustom)
    macros.push_back("#define ANAGLYPH_CUSTOM");

  GLSL::Program* shader = ACG::ShaderCache::getInstance()->getProgram("ScreenQuad/screenquad.glsl", "AnaglyphStereo/anaglyph.glsl", &macros);

  // ======================================================================================================
  // Bind input texture
  // ======================================================================================================

  _input[1]->bindColorTex(1);
  _input[0]->bindColorTex(0);

  // ======================================================================================================
  // Bind output FBO
  // ======================================================================================================

  _output.bind();

  // ======================================================================================================
  // Setup render states
  // ======================================================================================================

  glDepthMask(1);
  glColorMask(1,1,1,1);

  glDisable(GL_DEPTH_TEST);
  glDisable(GL_BLEND);

  // ======================================================================================================
  // Setup shader
  // ======================================================================================================

  shader->use();
  shader->setUniform("SceneLeft", 0);
  shader->setUniform("SceneRight", 1);

  if (OpenFlipper::Options::stereoMode () == OpenFlipper::Options::AnaglyphCustom)
  {
    // column major
    std::vector<float> le = OpenFlipper::Options::anaglyphLeftEyeColorMatrix();
    std::vector<float> re = OpenFlipper::Options::anaglyphRightEyeColorMatrix();

    ACG::GLMatrixf ml, mr;

    for (int r = 0; r < 3; ++r)
    {
      for (int c = 0; c < 3; ++c)
      {
        ml(r,c) = le[c*3 + r];
        mr(r,c) = re[c*3 + r];
      }
    }

    shader->setUniformMat3("EyeColMatrixLeft", ml);
    shader->setUniformMat3("EyeColMatrixRight", mr);
  }

  // ======================================================================================================
  // Execute
  // ======================================================================================================

  ACG::ScreenQuad::draw(shader);


  shader->disable();
}