K2dImageWork.cpp

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/***************************************************************************
 *   Copyright (C) 2007 by Jan Koci   *
 *   honza.koci@email.cz   *
 *   http://kengine.sourceforge.net/tutorial/
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include "K2dImageWork.h"

K2dImageWork::K2dImageWork(K3dGameData *_pGameData)
{
        m_pGameData = _pGameData;
        // Set this pointer to the game data
        m_pGameData->SetImageWork(this);
}

K2dImageWork::~K2dImageWork(void)
{
}

void K2dImageWork::DrawImages()
{
        for(int i=0; i<m_pGameData->Get2dImageObjSP().GetNum(); i++)
        {
                // Get 2d image from game data
                K2dImageObj *pkImage = m_pGameData->Get2dImageObjSP().Get(i);

                bool bIsBlend = pkImage->GetBlend();
                if(bIsBlend)
                {
                        glEnable(GL_BLEND);
                        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ;
                }

                int iTextureId = pkImage->GetTextureId();
                glBindTexture(GL_TEXTURE_2D, iTextureId );
                // Alpha determine blending
                glColor4f(1.0f,1.0f,1.0f,1.0f);

                SDL_Rect tRect = pkImage->GetRectangle();
                float x1 = tRect.x;
                float y1 = tRect.y;
                float x2 = tRect.w;
                float y2 = tRect.h;

                glBegin(GL_QUADS);
                glTexCoord2f(0.0f, 0.0f); glVertex2f(x1,y1);
                glTexCoord2f(1.0f, 0.0f); glVertex2f(x2,y1);
                glTexCoord2f(1.0f, 1.0f); glVertex2f(x2,y2);
                glTexCoord2f(0.0f, 1.0f); glVertex2f(x1,y2);
                glEnd(); 

                if(bIsBlend)
                {
                        glDisable(GL_BLEND);
                }
        }
}

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