/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the QtD3D12Window module
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** 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 The Qt Company Ltd 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 AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "window.h"

Window::Window()
    : f(Q_NULLPTR),
      green(0)
{
}

Window::~Window()
{
    delete f;
}

void Window::initializeD3D()
{
    f = createFence();
    ID3D12Device *dev = device();
    if (FAILED(dev->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, commandAllocator(), Q_NULLPTR, IID_PPV_ARGS(&commandList)))) {
        qWarning("Failed to create command list");
        return;
    }
    commandList->Close();
}

void Window::resizeD3D(const QSize &size)
{
    qDebug("resize %d %d", size.width(), size.height());
}

void Window::paintD3D()
{
    commandAllocator()->Reset();
    commandList->Reset(commandAllocator(), Q_NULLPTR);

    transitionResource(backBufferRenderTarget(), commandList.Get(), D3D12_RESOURCE_STATE_PRESENT, D3D12_RESOURCE_STATE_RENDER_TARGET);

    green += 0.01f;
    if (green > 1.0f)
        green = 0.0f;
    const float clearColor[] = { 0.0f, green, 0.0f, 1.0f };
    commandList->ClearRenderTargetView(backBufferRenderTargetCPUHandle(), clearColor, 0, Q_NULLPTR);

    transitionResource(backBufferRenderTarget(), commandList.Get(), D3D12_RESOURCE_STATE_RENDER_TARGET, D3D12_RESOURCE_STATE_PRESENT);
    commandList->Close();

    ID3D12CommandList *commandLists[] = { commandList.Get() };
    commandQueue()->ExecuteCommandLists(_countof(commandLists), commandLists);

    update(); // schedule the next frame by posting an UpdateRequest event
}

void Window::afterPresent()
{
    waitForGPU(f);
}