/******************************************************************************
 * Copyright 2020 NVIDIA Corporation. All rights reserved.
 *****************************************************************************/
/// \file
/// \brief Depth test shape rendering attribute

#ifndef NVIDIA_INDEX_IDEPTH_TEST_H
#define NVIDIA_INDEX_IDEPTH_TEST_H

#include <mi/base/interface_declare.h>
#include <mi/dice.h>

#include <nv/index/iattribute.h>

namespace nv
{
namespace index
{

/// Defines a depth test for the shapes defined in the scene description.
/// Similar to the depth tests in OpenGL, NVIDIA IndeX allows the application
/// to define the depth ordering of shapes on a 'per-fragment' level.
/// The depth test operation represents an attribute in the scene description
/// and has an effect on all the shapes that are defined subsequently
/// in the hierarchical description of the scene.
///
/// \ingroup nv_index_scene_description_attribute
///
class IDepth_test :
        public mi::base::Interface_declare<0xa8a4d29c,0x4a2d,0x456a,0xa2,0x73,0x4d,0x5e,0x3b,0x27,0x31,0xd5,
                                           nv::index::IAttribute>
{
public:
    /// Depth test modes that are supported by NVIDIA IndeX.
    enum Depth_test_mode
    {
        /// z-test less operator (<)
        TEST_LESS       = 0,
        /// z-test less than or equal operator (<=)
        TEST_LESS_EQUAL = 1
    };

public:
    /// Set depth test operator of this attribute.
    /// The default depth test operation is TEST_LESS_EQUAL.
    ///
    /// \param[in] test     The parameter defines the depth test operator.
    ///
    virtual void set_depth_test(Depth_test_mode test) = 0;

    /// Get current depth test operator of this attribute.
    ///
    /// \return   Returns the current depth test operator.
    ///
    virtual Depth_test_mode get_depth_test() const = 0;
};

}} // namespace index / nv

#endif // NVIDIA_INDEX_IDEPTH_TEST_H
