ImfRgba.h

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//
// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) Contributors to the OpenEXR Project.
//

#ifndef INCLUDED_IMF_RGBA_H
#define INCLUDED_IMF_RGBA_H

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

#include "ImfExport.h"
#include "ImfNamespace.h"

#include <half.h>

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER


//
// 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) {}
};


//
// Channels in an RGBA file
//

enum IMF_EXPORT_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
};


OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT





#endif