/***************************************************************************
 # Copyright (c) 2015-23, NVIDIA CORPORATION. All rights reserved.
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 # modification, are permitted provided that the following conditions
 # are met:
 #  * Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #  * Neither the name of NVIDIA CORPORATION nor the names of its
 #    contributors may be used to endorse or promote products derived
 #    from this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS "AS IS" AND ANY
 # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 **************************************************************************/
#include "BlendState.h"
#include "FBO.h"
#include "Core/ObjectPython.h"
#include "Utils/Scripting/ScriptBindings.h"

namespace Falcor
{
ref<BlendState> BlendState::create(const Desc& desc)
{
    return ref<BlendState>(new BlendState(desc));
}

BlendState::Desc::Desc()
{
    mRtDesc.resize(Fbo::getMaxColorTargetCount());
}

BlendState::~BlendState() = default;

BlendState::Desc& BlendState::Desc::setRtParams(
    uint32_t rtIndex,
    BlendOp rgbOp,
    BlendOp alphaOp,
    BlendFunc srcRgbFunc,
    BlendFunc dstRgbFunc,
    BlendFunc srcAlphaFunc,
    BlendFunc dstAlphaFunc
)
{
    checkArgument(rtIndex < mRtDesc.size(), "'rtIndex' ({}) is out of range.  Must be smaller than {}.", rtIndex, mRtDesc.size());

    mRtDesc[rtIndex].rgbBlendOp = rgbOp;
    mRtDesc[rtIndex].alphaBlendOp = alphaOp;
    mRtDesc[rtIndex].srcRgbFunc = srcRgbFunc;
    mRtDesc[rtIndex].dstRgbFunc = dstRgbFunc;
    mRtDesc[rtIndex].srcAlphaFunc = srcAlphaFunc;
    mRtDesc[rtIndex].dstAlphaFunc = dstAlphaFunc;
    return *this;
}

BlendState::Desc& BlendState::Desc::setRenderTargetWriteMask(
    uint32_t rtIndex,
    bool writeRed,
    bool writeGreen,
    bool writeBlue,
    bool writeAlpha
)
{
    checkArgument(rtIndex < mRtDesc.size(), "'rtIndex' ({}) is out of range.  Must be smaller than {}.", rtIndex, mRtDesc.size());

    mRtDesc[rtIndex].writeMask.writeRed = writeRed;
    mRtDesc[rtIndex].writeMask.writeGreen = writeGreen;
    mRtDesc[rtIndex].writeMask.writeBlue = writeBlue;
    mRtDesc[rtIndex].writeMask.writeAlpha = writeAlpha;
    return *this;
}

FALCOR_SCRIPT_BINDING(BlendState)
{
    pybind11::class_<BlendState, ref<BlendState>>(m, "BlendState");
}
} // namespace Falcor
