//
// 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_HD_ST_MATERIAL_BUFFER_SOURCE_AND_TEXTURE_HELPER_H
#define PXR_IMAGING_HD_ST_MATERIAL_BUFFER_SOURCE_AND_TEXTURE_HELPER_H

#include "pxr/pxr.h"
#include "pxr/imaging/hdSt/api.h"
#include "pxr/imaging/hd/bufferSource.h"
#include "pxr/imaging/hdSt/materialParam.h"
#include "pxr/imaging/hdSt/shaderCode.h"

PXR_NAMESPACE_OPEN_SCOPE

/// HdSt_MaterialBufferSourceAndTextureHelper
///
/// A helper for the old texture system to add texture resources to
/// the texture descriptors and buffer specs and sources for bindless
/// textures. This class will be deleted once the new texture system is
/// fully functional.
///
struct HdSt_MaterialBufferSourceAndTextureHelper
{
    /// Process material param of type HdSt_MaterialParam::ParamTypeTexture
    /// given the texture requested by the param.
    static
    void ProcessTextureMaterialParam(
        TfToken const &name,
        SdfPath const &texturePrim,
        HdStTextureResourceHandleSharedPtr const &handle,
        HdBufferSpecVector * specs,
        HdBufferSourceSharedPtrVector * sources,
        HdStShaderCode::TextureDescriptorVector * textureDescriptors);
};

PXR_NAMESPACE_CLOSE_SCOPE

#endif