screen_rect.cpp

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/*
 * Copyright (c) 2010, Willow Garage, 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:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions 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 the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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#include <rve_render_server/screen_rect.h>
#include <rve_render_server/render_target.h>
#include <rve_render_server/renderer.h>

#include <OGRE/OgreRectangle2D.h>
#include <OGRE/OgreMaterial.h>
#include <OGRE/OgreMaterialManager.h>
#include <OGRE/OgreTexture.h>
#include <OGRE/OgreTextureUnitState.h>
#include <OGRE/OgrePass.h>
#include <OGRE/OgreTechnique.h>

namespace rve_render_server
{

class ScreenRectRenderable : public Ogre::Rectangle2D
{
public:
  ScreenRectRenderable()
  : Ogre::Rectangle2D(true)
  {
    std::stringstream ss;
    static uint32_t count = 0;
    ss << "ScreenRectMaterial" << count++;
    mat = Ogre::MaterialManager::getSingleton().create(ss.str(), ROS_PACKAGE_NAME);
    mat->setLightingEnabled(false);
    mat->setDepthCheckEnabled(false);
    mat->setDepthWriteEnabled(true);
    setMaterial(mat->getName());
  }

  ~ScreenRectRenderable()
  {
    Ogre::MaterialManager::getSingleton().remove(mat->getName());
  }

  Ogre::MaterialPtr mat;
};

ScreenRect::ScreenRect(const rve_common::UUID& id)
: id_(id)
{
  renderable_ = new ScreenRectRenderable();
}

ScreenRect::~ScreenRect()
{
  delete renderable_;
}

void ScreenRect::setCorners(float x0, float y0, float x1, float y1)
{
  // Ogre wants these in:
  //left    Left position in screen relative coordinates, -1 = left edge, 1.0 = right edge
  //top     Top position in screen relative coordinates, 1 = top edge, -1 = bottom edge
  //right   Right position in screen relative coordinates
  //bottom  Bottom position in screen relative coordinates

  renderable_->setCorners(x0 * 2.0 - 1.0, 1.0 - (y0 * 2.0), x1 * 2.0 - 1.0, 1.0 - y1 * 2.0);
}

void ScreenRect::setColor(const Ogre::ColourValue& color)
{
  Ogre::Pass* p = renderable_->mat->getTechnique(0)->getPass(0);
  p->removeAllTextureUnitStates();
  p->setDiffuse(color);
}

void ScreenRect::setTexture(const std::string& ogre_texture_name)
{
  Ogre::Pass* p = renderable_->mat->getTechnique(0)->getPass(0);
  if (p->getNumTextureUnitStates() == 0)
  {
    p->createTextureUnitState();
  }

  Ogre::TextureUnitState* tu = p->getTextureUnitState(0);
  tu->setTextureName(ogre_texture_name);
}

void ScreenRect::setZOrder(uint32_t zorder)
{
  zorder_ = zorder;
}

Ogre::Renderable* ScreenRect::getRenderable()
{
  return renderable_;
}

}