// -*-c++-*-
// SPDX-License-Identifier: LGPL-2.1-only
// Copyright (C) 2022 James Hogan <james@albanarts.com>

#ifndef OSGXR_CompositionLayerQuad
#define OSGXR_CompositionLayerQuad 1

#include <osgXR/Export>
#include <osgXR/CompositionLayer>

#include <osg/Quat>
#include <osg/Referenced>
#include <osg/Vec2f>
#include <osg/Vec3f>

namespace osgXR {

class Manager;
class SubImage;
class Swapchain;

/**
 * Represents an OpenXR quad composition layer.
 */
class OSGXR_EXPORT CompositionLayerQuad : public CompositionLayer
{
    public:

        /// Constructor.
        CompositionLayerQuad(Manager *manager);

        /// Destructor.
        ~CompositionLayerQuad();

        // Accessors

        typedef enum {
            // Must match XR_EYE_VISIBILITY_*
            /// Display layer to both eyes.
            EYES_BOTH = 0,
            /// Display layer only to left eye.
            EYES_LEFT = 1,
            /// Display layer only to right eye.
            EYES_RIGHT = 2,
        } EyeVisibility;
        /// Set eye visibility.
        void setEyeVisibility(EyeVisibility eyes);
        /// Get eye visibility (default: EYES_BOTH).
        EyeVisibility getEyeVisibility() const;

        /// Set swapchain.
        void setSubImage(Swapchain *swapchain);
        /// Set swapchain subimage.
        void setSubImage(const SubImage &subimage);
        /// Get swapchain subimage.
        const SubImage &getSubImage() const;

        /// Set orientation of quad normal (+ve Z).
        void setOrientation(const osg::Quat &quat);
        /// Get orientation of quad normal (+ve Z).
        const osg::Quat &getOrientation() const;

        /// Set center position of quad.
        void setPosition(const osg::Vec3f &pos);
        /// Get center position of quad (default: 0, 0, -1m).
        const osg::Vec3f &getPosition() const;

        /// Set size of quad in meters.
        void setSize(const osg::Vec2f &size);
        /// Get size of quad in meters (default 1m*1m).
        const osg::Vec2f &getSize() const;
};

}

#endif