/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <sal/config.h>

#include <memory>

#include <sal/log.hxx>

#include <basegfx/utils/canvastools.hxx>
#include <canvas/canvastools.hxx>
#include <com/sun/star/lang/NoSupportException.hpp>
#include <toolkit/helper/vclunohelper.hxx>
#include <tools/diagnose_ex.h>
#include <vcl/sysdata.hxx>
#include <vcl/window.hxx>

#include "dx_canvasbitmap.hxx"
#include "dx_linepolypolygon.hxx"
#include "dx_spritecanvas.hxx"
#include "dx_spritedevicehelper.hxx"
#include "dx_winstuff.hxx"


using namespace ::com::sun::star;

namespace dxcanvas
{
    SpriteDeviceHelper::SpriteDeviceHelper() :
        DeviceHelper(),
        mpSpriteCanvas( nullptr ),
        mpBackBuffer(),
        mpSurfaceProxyManager(),
        mpRenderModule()
    {
    }

    void SpriteDeviceHelper::init( vcl::Window&               rWindow,
                                   SpriteCanvas&         rSpriteCanvas,
                                   const awt::Rectangle& rRect,
                                   bool                  /*bFullscreen*/ )
    {
        // #i60490# ensure backbuffer has sensible minimal size
        const sal_Int32 w( std::max(sal_Int32(1),sal_Int32(rRect.Width)));
        const sal_Int32 h( std::max(sal_Int32(1),sal_Int32(rRect.Height)));

        rSpriteCanvas.setWindow(
            uno::Reference<awt::XWindow2>(
                VCLUnoHelper::GetInterface(&rWindow),
                uno::UNO_QUERY_THROW) );

        const SystemEnvData *pData = rWindow.GetSystemData();
        const HWND hWnd = reinterpret_cast<HWND>(pData->hWnd);
        if( !IsWindow( hWnd ) )
            throw lang::NoSupportException( "Passed window has invalid system window, or canvas out-of-process!" );

        mpSpriteCanvas = &rSpriteCanvas;

        try
        {
            // setup directx rendermodule
            mpRenderModule = createRenderModule( rWindow );
        }
        catch (...) {

            throw lang::NoSupportException( "Could not create DirectX device!",
                static_cast< ::cppu::OWeakObject* >(&rSpriteCanvas) );
        }

        // create the surfaceproxy manager
        mpSurfaceProxyManager = ::canvas::createSurfaceProxyManager( mpRenderModule );

        // #i60490# ensure backbuffer has sensible minimal size
        mpBackBuffer = std::make_shared<DXSurfaceBitmap>(
                               ::basegfx::B2ISize(w,h),
                               mpSurfaceProxyManager,
                               mpRenderModule,
                               false);

        // Assumes: SystemChildWindow() has CS_OWNDC
        DeviceHelper::init(GetDC(mpRenderModule->getHWND()),rWindow.GetOutDev(), rSpriteCanvas);
    }

    void SpriteDeviceHelper::disposing()
    {
        // release all references
        mpBackBuffer.reset();
        mpSurfaceProxyManager.reset();
        mpRenderModule.reset();
        mpSpriteCanvas = nullptr;

        DeviceHelper::disposing();
    }

    uno::Reference< rendering::XBitmap > SpriteDeviceHelper::createCompatibleBitmap(
        const uno::Reference< rendering::XGraphicDevice >&  /*rDevice*/,
        const geometry::IntegerSize2D&                      size )
    {
        if( !getDevice() )
            return uno::Reference< rendering::XBitmap >(); // we're disposed

        DXSurfaceBitmapSharedPtr pBitmap = std::make_shared<DXSurfaceBitmap>(
                ::basegfx::unotools::b2ISizeFromIntegerSize2D(size),
                mpSurfaceProxyManager,
                mpRenderModule,
                false);

        // create a 24bit RGB system memory surface
        return uno::Reference< rendering::XBitmap >(new CanvasBitmap(pBitmap,getDevice()));
    }

    uno::Reference< rendering::XVolatileBitmap > SpriteDeviceHelper::createVolatileBitmap(
        const uno::Reference< rendering::XGraphicDevice >&  /*rDevice*/,
        const geometry::IntegerSize2D&                      /*size*/ )
    {
        return uno::Reference< rendering::XVolatileBitmap >();
    }

    uno::Reference< rendering::XBitmap > SpriteDeviceHelper::createCompatibleAlphaBitmap(
        const uno::Reference< rendering::XGraphicDevice >&  /*rDevice*/,
        const geometry::IntegerSize2D&                      size )
    {
        if( !getDevice() )
            return uno::Reference< rendering::XBitmap >(); // we're disposed

        DXSurfaceBitmapSharedPtr pBitmap = std::make_shared<DXSurfaceBitmap>(
                ::basegfx::unotools::b2ISizeFromIntegerSize2D(size),
                mpSurfaceProxyManager,
                mpRenderModule,
                true);

        // create a 32bit ARGB system memory surface
        return uno::Reference< rendering::XBitmap >(new CanvasBitmap(pBitmap,getDevice()));
    }

    uno::Reference< rendering::XVolatileBitmap > SpriteDeviceHelper::createVolatileAlphaBitmap(
        const uno::Reference< rendering::XGraphicDevice >&  /*rDevice*/,
        const geometry::IntegerSize2D&                      /*size*/ )
    {
        return uno::Reference< rendering::XVolatileBitmap >();
    }

    void SpriteDeviceHelper::destroyBuffers()
    {
        // TODO(F3): implement XBufferStrategy interface. For now, we
        // _always_ will have exactly one backbuffer
    }

    bool SpriteDeviceHelper::showBuffer( bool, bool )
    {
        SAL_WARN("canvas.directx", "Not supposed to be called, handled by SpriteCanvas");
        return false;
    }

    bool SpriteDeviceHelper::switchBuffer( bool, bool )
    {
        SAL_WARN("canvas.directx", "Not supposed to be called, handled by SpriteCanvas");
        return false;
    }

    uno::Any SpriteDeviceHelper::isAccelerated() const
    {
        return css::uno::Any(true);
    }

    void SpriteDeviceHelper::notifySizeUpdate( const awt::Rectangle& rBounds )
    {
        // #i60490# ensure backbuffer has sensible minimal size
        const sal_Int32 x(rBounds.X);
        const sal_Int32 y(rBounds.Y);
        const sal_Int32 w(std::max(sal_Int32(1),sal_Int32(rBounds.Width)));
        const sal_Int32 h(std::max(sal_Int32(1),sal_Int32(rBounds.Height)));

        if( mpRenderModule )
            mpRenderModule->resize(::basegfx::B2IRange(x,y,x+w,y+h));

        resizeBackBuffer(::basegfx::B2ISize(w,h));
    }

    void SpriteDeviceHelper::resizeBackBuffer( const ::basegfx::B2ISize& rNewSize )
    {
        // disposed?
        if(!mpBackBuffer)
            return;

        mpBackBuffer->resize(rNewSize);
        mpBackBuffer->clear();
    }

    HWND SpriteDeviceHelper::getHwnd() const
    {
        if( mpRenderModule )
            return mpRenderModule->getHWND();
        else
            return nullptr;
    }

    void SpriteDeviceHelper::dumpScreenContent() const
    {
        if( mpRenderModule )
            mpRenderModule->screenShot();
    }
}

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