//
// Copyright 2016 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_HD_ST_GL_CONVERSIONS_H
#define PXR_IMAGING_HD_ST_GL_CONVERSIONS_H

#include "pxr/pxr.h"
#include "pxr/imaging/hdSt/api.h"
#include "pxr/imaging/hd/enums.h"
#include "pxr/imaging/hd/types.h"
#include "pxr/base/tf/token.h"

PXR_NAMESPACE_OPEN_SCOPE


class HdStGLConversions {
public:
    /// Returns the size of glDataType.
    /// For example: sizeof(GLuint)
    HDST_API
    static size_t GetComponentSize(int glDataType);

    HDST_API
    static GLenum GetGlDepthFunc(HdCompareFunction func);

    HDST_API
    static GLenum GetGlStencilFunc(HdCompareFunction func);

    HDST_API
    static GLenum GetGlStencilOp(HdStencilOp op);

    HDST_API
    static GLenum GetGlBlendOp(HdBlendOp op);

    HDST_API
    static GLenum GetGlBlendFactor(HdBlendFactor factor);

    HDST_API
    static GLenum GetMinFilter(HdMinFilter filter);

    HDST_API
    static GLenum GetMagFilter(HdMagFilter filter);

    HDST_API
    static GLenum GetWrap(HdWrap wrap);

    HDST_API
    static void GetGlFormat(HdFormat inFormat, GLenum *outFormat, GLenum *outType, GLenum *outInternalFormat);

    HDST_API
    static int GetGLAttribType(HdType type);

    /// Return the name of the given type as represented in GLSL.
    HDST_API
    static TfToken GetGLSLTypename(HdType type);

    /// Return a GLSL-safe, mangled name identifier.
    HDST_API
    static TfToken GetGLSLIdentifier(TfToken const& identifier);
};


PXR_NAMESPACE_CLOSE_SCOPE

#endif // PXR_IMAGING_HD_ST_GL_CONVERSIONS_H