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