guitexture.cpp

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/*
 * Vega Strike
 * Copyright (C) 2003 Mike Byron.
 * Some code borrowed from David Ranger.
 *
 * http://vegastrike.sourceforge.net/
 *
 * 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 "vegastrike.h"

#include "guitexture.h"

#include <gnuhash.h>

#include <string>
#include <png.h>
#include "vsfilesystem.h"
#include "gfx/vsimage.h"
#include "gldrv/gl_globals.h"
#include "gfx/aux_texture.h"

using namespace VSFileSystem;

//Read a texture from a file and bind it.
bool GuiTexture::read( const std::string &fileName )
{
    Texture*oldTexture( m_texture );
    m_texture = new Texture( fileName.c_str(), 0, BILINEAR );
    if (m_texture && !m_texture->LoadSuccess() && oldTexture) {
        delete m_texture;
        m_texture = oldTexture;
    } else {
        delete oldTexture;
    }
    return m_texture->LoadSuccess();
}

//Draw this texture, stretching to fit the rect.
void GuiTexture::draw( const Rect &rect ) const
{
    //Don't draw unless there is something usable.
    if ( m_texture == NULL || !m_texture->LoadSuccess() )
        return;
    m_texture->MakeActive();
    GFXBegin( GFXQUAD );
    GFXColor4f( 1, 1, 1, 1 );
    GFXTexCoord2f( 0, 1 );
    GFXVertexf( Vector( rect.left(), rect.top(), 0.00f ) );
    GFXTexCoord2f( 0, 0 );
    GFXVertexf( Vector( rect.left(), rect.bottom(), 0.00f ) );
    GFXTexCoord2f( 1, 0 );
    GFXVertexf( Vector( rect.right(), rect.bottom(), 0.00f ) );
    GFXTexCoord2f( 1, 1 );
    GFXVertexf( Vector( rect.right(), rect.top(), 0.00f ) );
    GFXEnd();
}

//CONSTRUCTION
GuiTexture::GuiTexture( void ) :
    m_texture( NULL )
{}

GuiTexture::~GuiTexture( void )
{
    if (m_texture) delete m_texture;
}