source: NonGTP/OpenEXR/include/IlmImf/ImfRgba.h @ 855

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
// 
// All rights reserved.
// 
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///////////////////////////////////////////////////////////////////////////


#ifndef INCLUDED_IMF_RGBA_H
#define INCLUDED_IMF_RGBA_H

//-----------------------------------------------------------------------------
//
//      class Rgba
//
//-----------------------------------------------------------------------------

#include <half.h>

namespace Imf {


//
// RGBA pixel
//

struct Rgba
{
    half        r;
    half        g;
    half        b;
    half        a;
    
    Rgba () {}
    Rgba (half r, half g, half b, half a = 1.f): r (r), g (g), b (b), a (a) {}

    Rgba & operator = (const Rgba &other)
    {
        r = other.r;
        g = other.g;
        b = other.b;
        a = other.a;

        return *this;
    }
};


//
// Channels in an RGBA file
//

enum RgbaChannels
{
    WRITE_R     = 0x01,         // Red
    WRITE_G     = 0x02,         // Green
    WRITE_B     = 0x04,         // Blue
    WRITE_A     = 0x08,         // Alpha

    WRITE_Y     = 0x10,         // Luminance, for black-and-white images,
                                // or in combination with chroma

    WRITE_C     = 0x20,         // Chroma (two subsampled channels, RY and BY,
                                // supported only for scanline-based files)

    WRITE_RGB   = 0x07,         // Red, green, blue
    WRITE_RGBA  = 0x0f,         // Red, green, blue, alpha

    WRITE_YC    = 0x30,         // Luminance, chroma
    WRITE_YA    = 0x18,         // Luminance, alpha
    WRITE_YCA   = 0x38          // Luminance, chroma, alpha
};


} // namespace Imf

#endif