glc_imageplane.cpp

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/****************************************************************************

 This file is part of the GLC-lib library.
 Copyright (C) 2005-2008 Laurent Ribon (laumaya@users.sourceforge.net)
 Version 2.0.0, packaged on July 2010.

 http://glc-lib.sourceforge.net

 GLC-lib is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 3 of the License, or
 (at your option) any later version.

 GLC-lib is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with GLC-lib; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

*****************************************************************************/

#include "glc_imageplane.h"
#include "glc_viewport.h"
#include "../glc_openglexception.h"
#include "../glc_factory.h"
#include <QtDebug>

// Constructor Destructor

GLC_ImagePlane::GLC_ImagePlane(const QGLContext *pContext, const QString& ImageName)
: m_Material()
{
        GLC_Texture* pImgTexture= GLC_Factory::instance(pContext)->createTexture(ImageName);
        pImgTexture->setMaxTextureSize(pImgTexture->imageOfTexture().size());
        m_Material.setTexture(pImgTexture);
}

GLC_ImagePlane::GLC_ImagePlane(const QGLContext *pContext, const QImage& image)
: m_Material()
{
        GLC_Texture* pImgTexture= GLC_Factory::instance(pContext)->createTexture(image);
        pImgTexture->setMaxTextureSize(image.size());
        m_Material.setTexture(pImgTexture);
}

GLC_ImagePlane::~GLC_ImagePlane()
{

}

// OpenGL Functions

void GLC_ImagePlane::render()
{
        m_Material.glExecute();
        // Display info area
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();
        glOrtho(-1,1,-1,1,-1,1);
        glMatrixMode(GL_MODELVIEW);
        glPushMatrix();
        glLoadIdentity();

        glDisable(GL_BLEND);
        glDisable(GL_DEPTH_TEST);
        glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
        glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
        glBegin(GL_QUADS);

                glNormal3d(0.0, 0.0, 1.0);      // Z
                glTexCoord2f(0.0f, 0.0f); glVertex3d(-1.0, -1.0, 0.0);
                glTexCoord2f(1.0f, 0.0f); glVertex3d(1.0, -1.0, 0.0);
                glTexCoord2f(1.0f, 1.0f); glVertex3d(1.0, 1.0, 0.0);
                glTexCoord2f(0.0f, 1.0f); glVertex3d(-1.0, 1.0, 0.0);

        glEnd();
        glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
        glEnable(GL_DEPTH_TEST);

        glPopMatrix();
        glMatrixMode(GL_PROJECTION);
        glPopMatrix();
        glMatrixMode(GL_MODELVIEW);
}