attachmentDesc.h

//
// Copyright 2020 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_ATTACHMENT_DESC_H
#define PXR_IMAGING_HGI_ATTACHMENT_DESC_H

#include "pxr/pxr.h"
#include "pxr/imaging/hgi/api.h"
#include "pxr/imaging/hgi/enums.h"
#include "pxr/imaging/hgi/types.h"
#include "pxr/base/gf/vec4f.h"
#include <vector>

PXR_NAMESPACE_OPEN_SCOPE


struct HgiAttachmentDesc
{
    HgiAttachmentDesc() 
    : format(HgiFormatInvalid)
    , usage(0)
    , loadOp(HgiAttachmentLoadOpLoad)
    , storeOp(HgiAttachmentStoreOpStore)
    , clearValue(0)
    , colorMask(HgiColorMaskRed | HgiColorMaskGreen |
                HgiColorMaskBlue | HgiColorMaskAlpha)
    , blendEnabled(false)
    , srcColorBlendFactor(HgiBlendFactorZero)
    , dstColorBlendFactor(HgiBlendFactorZero)
    , colorBlendOp(HgiBlendOpAdd)
    , srcAlphaBlendFactor(HgiBlendFactorZero)
    , dstAlphaBlendFactor(HgiBlendFactorZero)
    , alphaBlendOp(HgiBlendOpAdd)
    , blendConstantColor(0.0f, 0.0f, 0.0f, 0.0f)
    {}

    HgiFormat format;
    HgiTextureUsage usage;
    HgiAttachmentLoadOp loadOp;
    HgiAttachmentStoreOp storeOp;
    GfVec4f clearValue;
    HgiColorMask colorMask;
    bool blendEnabled;
    HgiBlendFactor srcColorBlendFactor;
    HgiBlendFactor dstColorBlendFactor;
    HgiBlendOp colorBlendOp;
    HgiBlendFactor srcAlphaBlendFactor;
    HgiBlendFactor dstAlphaBlendFactor;
    HgiBlendOp alphaBlendOp;
    GfVec4f blendConstantColor;
};

using HgiAttachmentDescVector = std::vector<HgiAttachmentDesc>;

HGI_API
bool operator==(
    const HgiAttachmentDesc& lhs,
    const HgiAttachmentDesc& rhs);

HGI_API
bool operator!=(
    const HgiAttachmentDesc& lhs,
    const HgiAttachmentDesc& rhs);

HGI_API
std::ostream& operator<<(
    std::ostream& out,
    const HgiAttachmentDesc& attachment);


PXR_NAMESPACE_CLOSE_SCOPE

#endif