/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_canvas.hxx"

#include <ctype.h> // don't ask. msdev breaks otherwise...
#include <vcl/window.hxx>
#include <vcl/canvastools.hxx>
#include <canvas/debug.hxx>
#include <canvas/verbosetrace.hxx>
#include <canvas/canvastools.hxx>
#include <tools/diagnose_ex.h>

#include <osl/mutex.hxx>
#include <cppuhelper/compbase1.hxx>

#include <com/sun/star/lang/NoSupportException.hpp>
#include <toolkit/helper/vclunohelper.hxx>
#include <basegfx/tools/canvastools.hxx>
#include "dx_linepolypolygon.hxx"
#include "dx_spritecanvas.hxx"
#include "dx_canvasbitmap.hxx"
#include "dx_devicehelper.hxx"


#undef WB_LEFT
#undef WB_RIGHT
#include "dx_winstuff.hxx"


#include <vcl/sysdata.hxx>

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

namespace dxcanvas
{
    DeviceHelper::DeviceHelper() :
        mpDevice( NULL ),
        mnHDC(0)
    {
    }

    void DeviceHelper::init( HDC                        hdc,
                             rendering::XGraphicDevice& rDevice )
    {
        mnHDC    = hdc;
        mpDevice = &rDevice;
    }

    void DeviceHelper::disposing()
    {
        // release all references
        mnHDC = 0;
        mpDevice = NULL;
    }

    geometry::RealSize2D DeviceHelper::getPhysicalResolution()
    {
        if( !mpDevice )
            return ::canvas::tools::createInfiniteSize2D(); // we're disposed

		HDC hDC = getHDC();
		ENSURE_OR_THROW( hDC,
                          "DeviceHelper::getPhysicalResolution(): cannot retrieve HDC from window" );

		const int nHorzRes( GetDeviceCaps( hDC,
                                           LOGPIXELSX ) );
		const int nVertRes( GetDeviceCaps( hDC,
                                           LOGPIXELSY ) );

        return geometry::RealSize2D( nHorzRes*25.4,
                                     nVertRes*25.4 );
    }

    geometry::RealSize2D DeviceHelper::getPhysicalSize()
    {
        if( !mpDevice )
            return ::canvas::tools::createInfiniteSize2D(); // we're disposed

		HDC hDC=getHDC();
		ENSURE_OR_THROW( hDC,
                          "DeviceHelper::getPhysicalSize(): cannot retrieve HDC from window" );

        const int nHorzSize( GetDeviceCaps( hDC,
                                            HORZSIZE ) );
        const int nVertSize( GetDeviceCaps( hDC,
                                            VERTSIZE ) );

        return geometry::RealSize2D( nHorzSize,
                                     nVertSize );
    }

    uno::Reference< rendering::XLinePolyPolygon2D > DeviceHelper::createCompatibleLinePolyPolygon(
        const uno::Reference< rendering::XGraphicDevice >& 				/*rDevice*/,
        const uno::Sequence< uno::Sequence< geometry::RealPoint2D > >&	points )
    {
        if( !mpDevice )
            return uno::Reference< rendering::XLinePolyPolygon2D >(); // we're disposed

        return uno::Reference< rendering::XLinePolyPolygon2D >(
            new LinePolyPolygon(
                ::basegfx::unotools::polyPolygonFromPoint2DSequenceSequence( points ) ) );
    }

    uno::Reference< rendering::XBezierPolyPolygon2D > DeviceHelper::createCompatibleBezierPolyPolygon(
        const uno::Reference< rendering::XGraphicDevice >& 						/*rDevice*/,
        const uno::Sequence< uno::Sequence< geometry::RealBezierSegment2D > >&	points )
    {
        if( !mpDevice )
            return uno::Reference< rendering::XBezierPolyPolygon2D >(); // we're disposed

        return uno::Reference< rendering::XBezierPolyPolygon2D >(
            new LinePolyPolygon(
                ::basegfx::unotools::polyPolygonFromBezier2DSequenceSequence( points ) ) );
    }

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

		DXBitmapSharedPtr pBitmap(
			new DXBitmap(
				::basegfx::unotools::b2ISizeFromIntegerSize2D(size),
				false));

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

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

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

		DXBitmapSharedPtr pBitmap(
			new DXBitmap(
				::basegfx::unotools::b2ISizeFromIntegerSize2D(size),
				true));

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

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

    sal_Bool DeviceHelper::hasFullScreenMode()
    {
        return false;
    }

    sal_Bool DeviceHelper::enterFullScreenMode( sal_Bool /*bEnter*/ )
    {
        return false;
    }

    uno::Any DeviceHelper::isAccelerated() const
    {
        return ::com::sun::star::uno::makeAny(false);
    }

	uno::Any DeviceHelper::getDeviceHandle() const
    {
        HDC hdc( getHDC() );
        if( hdc )
            return uno::makeAny( reinterpret_cast< sal_Int64 >(hdc) );
        else
            return uno::Any();
    }

    uno::Any DeviceHelper::getSurfaceHandle() const
    {
		// TODO(F1): expose DirectDraw object
        //return mpBackBuffer->getBitmap().get();
		return uno::Any();
    }

    namespace 
    { 
        struct DeviceColorSpace: public rtl::StaticWithInit<uno::Reference<rendering::XColorSpace>,
                                                            DeviceColorSpace> 
        {
            uno::Reference<rendering::XColorSpace> operator()()
            {
                return vcl::unotools::createStandardColorSpace();
            }
        }; 
    }
    
    uno::Reference<rendering::XColorSpace> DeviceHelper::getColorSpace() const
    {
        // always the same
        return DeviceColorSpace::get();
    }
}