//
// Copyright 2019 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#ifndef PXR_IMAGING_HGI_GL_CONVERSIONS_H
#define PXR_IMAGING_HGI_GL_CONVERSIONS_H

#include <GL/glew.h>
#include "pxr/pxr.h"
#include "pxr/imaging/hgiGL/api.h"
#include "pxr/imaging/hgi/enums.h"
#include "pxr/imaging/hgi/types.h"

#include <vector>

PXR_NAMESPACE_OPEN_SCOPE

///
/// \class HgiGLConversions
///
/// Converts from Hgi types to GL types.
///
class HgiGLConversions final
{
public:
    HGIGL_API
    static void GetFormat(
        HgiFormat inFormat,
        GLenum *outFormat,
        GLenum *outType,
        GLenum *outInternalFormat = nullptr);

    HGIGL_API
    static GLenum GetFormatType(HgiFormat inFormat);

    HGIGL_API
    static std::vector<GLenum> GetShaderStages(HgiShaderStage ss);

    HGIGL_API
    static GLenum GetCullMode(HgiCullMode cm);

    HGIGL_API
    static GLenum GetPolygonMode(HgiPolygonMode pm);

    HGIGL_API
    static GLenum GetBlendFactor(HgiBlendFactor bf);

    HGIGL_API
    static GLenum GetBlendEquation(HgiBlendOp bo);

    HGIGL_API
    static GLenum GetDepthCompareFunction(HgiCompareFunction cf);

    HGIGL_API
    static GLenum GetTextureType(HgiTextureType tt);

    HGIGL_API
    static GLenum GetSamplerAddressMode(HgiSamplerAddressMode am);

    HGIGL_API
    static GLenum GetMagFilter(HgiSamplerFilter mf);

    HGIGL_API
    static GLenum GetMinFilter(
        HgiSamplerFilter minFilter, 
        HgiMipFilter mipFilter);
};


PXR_NAMESPACE_CLOSE_SCOPE

#endif