//
// 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.
//
#include <GL/glew.h>
#include "pxr/imaging/hgiGL/blitCmds.h"
#include "pxr/imaging/hgiGL/buffer.h"
#include "pxr/imaging/hgiGL/conversions.h"
#include "pxr/imaging/hgiGL/device.h"
#include "pxr/imaging/hgiGL/diagnostic.h"
#include "pxr/imaging/hgiGL/hgi.h"
#include "pxr/imaging/hgiGL/ops.h"
#include "pxr/imaging/hgiGL/scopedStateHolder.h"
#include "pxr/imaging/hgiGL/texture.h"
#include "pxr/imaging/hgi/blitCmdsOps.h"

PXR_NAMESPACE_OPEN_SCOPE

HgiGLBlitCmds::HgiGLBlitCmds()
    : HgiBlitCmds()
{
}

HgiGLBlitCmds::~HgiGLBlitCmds() = default;

void
HgiGLBlitCmds::PushDebugGroup(const char* label)
{
    _ops.push_back( HgiGLOps::PushDebugGroup(label) );
}

void
HgiGLBlitCmds::PopDebugGroup()
{
    _ops.push_back( HgiGLOps::PopDebugGroup() );
}

void
HgiGLBlitCmds::CopyTextureGpuToCpu(
    HgiTextureGpuToCpuOp const& copyOp)
{
    _ops.push_back( HgiGLOps::CopyTextureGpuToCpu(copyOp) );
}

void
HgiGLBlitCmds::CopyBufferGpuToGpu(
    HgiBufferGpuToGpuOp const& copyOp)
{
    _ops.push_back( HgiGLOps::CopyBufferGpuToGpu(copyOp) );
}

void 
HgiGLBlitCmds::CopyBufferCpuToGpu(HgiBufferCpuToGpuOp const& copyOp)
{
    _ops.push_back( HgiGLOps::CopyBufferCpuToGpu(copyOp) );
}

void
HgiGLBlitCmds::GenerateMipMaps(HgiTextureHandle const& texture)
{
    _ops.push_back( HgiGLOps::GenerateMipMaps(texture) );
}

bool
HgiGLBlitCmds::_Submit(Hgi* hgi)
{
    if (_ops.empty()) {
        return false;
    }

    // Capture OpenGL state before executing the 'ops' and restore it when this
    // function ends. We do this defensively because parts of our pipeline may
    // not set and restore all relevant gl state.
    HgiGL_ScopedStateHolder openglStateGuard;

    HgiGL* hgiGL = static_cast<HgiGL*>(hgi);
    HgiGLDevice* device = hgiGL->GetPrimaryDevice();
    device->SubmitOps(_ops);
    return true;
}

PXR_NAMESPACE_CLOSE_SCOPE