ColorBlock.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributors: Amorilia (amorilia@users.sourceforge.net)
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/*
 * This file is based on a similar file from the NVIDIA texture tools
 * (http://nvidia-texture-tools.googlecode.com/)
 *
 * Original license from NVIDIA follows.
 */

// This code is in the public domain -- castanyo@yahoo.es

#ifndef _DDS_COLORBLOCK_H
#define _DDS_COLORBLOCK_H

#include <Color.h>
#include <Image.h>

struct ColorBlock
{
    ColorBlock();
    ColorBlock(const uint * linearImage);
    ColorBlock(const ColorBlock & block);
    ColorBlock(const Image * img, uint x, uint y);
    
    void init(const Image * img, uint x, uint y);
    void init(uint w, uint h, const uint * data, uint x, uint y);
    void init(uint w, uint h, const float * data, uint x, uint y);
    
    void swizzle(uint x, uint y, uint z, uint w); // 0=r, 1=g, 2=b, 3=a, 4=0xFF, 5=0
    
    bool isSingleColor(Color32 mask = Color32(0xFF, 0xFF, 0xFF, 0x00)) const;
    bool hasAlpha() const;
    
    
    // Accessors
    const Color32 * colors() const;

    Color32 color(uint i) const;
    Color32 & color(uint i);
    
    Color32 color(uint x, uint y) const;
    Color32 & color(uint x, uint y);
    
private:
    
    Color32 m_color[4*4];
    
};


inline const Color32 * ColorBlock::colors() const
{
    return m_color;
}

inline Color32 ColorBlock::color(uint i) const
{
    return m_color[i];
}

inline Color32 & ColorBlock::color(uint i)
{
    return m_color[i];
}

inline Color32 ColorBlock::color(uint x, uint y) const
{
    return m_color[y * 4 + x];
}

inline Color32 & ColorBlock::color(uint x, uint y)
{
    return m_color[y * 4 + x];
}

#endif // _DDS_COLORBLOCK_H