pagescale.cpp

WDK 下的XPSDrv 中filter 例子之scaling

/*++

Copyright (c) 2005 Microsoft Corporation

All rights reserved.

THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.

File Name:

   pagescale.cpp

Abstract:

   Page Scaling class implementation. The Page Scaling class provides
   functionality required to perform page Scaling. This includes methods for converting a GDI matrix object
   into the appropriate XPS matrix mark-up and intialising the matrix according to
   the Page Scaling options.

--*/

#include "precomp.h"
#include "debug.h"
#include "globals.h"
#include "xdstring.h"
#include "pagescale.h"

using XDPrintSchema::PageScaling::EScaleOption;
using XDPrintSchema::PageScaling::Custom;
using XDPrintSchema::PageScaling::CustomSquare;
using XDPrintSchema::PageScaling::FitBleedToImageable;
using XDPrintSchema::PageScaling::FitContentToImageable;
using XDPrintSchema::PageScaling::FitMediaToImageable;
using XDPrintSchema::PageScaling::FitMediaToMedia;

using XDPrintSchema::PageScaling::OffsetAlignment::EScaleOffsetOption;
using XDPrintSchema::PageScaling::OffsetAlignment::BottomCenter;
using XDPrintSchema::PageScaling::OffsetAlignment::BottomLeft;
using XDPrintSchema::PageScaling::OffsetAlignment::BottomRight;
using XDPrintSchema::PageScaling::OffsetAlignment::Center;
using XDPrintSchema::PageScaling::OffsetAlignment::LeftCenter;
using XDPrintSchema::PageScaling::OffsetAlignment::RightCenter;
using XDPrintSchema::PageScaling::OffsetAlignment::TopCenter;
using XDPrintSchema::PageScaling::OffsetAlignment::TopLeft;
using XDPrintSchema::PageScaling::OffsetAlignment::TopRight;

/*++

Routine Name:

    CPageScaling::CPageScaling

Routine Description:

    CPageScaling class constructor

Arguments:

    pgscProps - Reference to the page scaling PrintTicket properties.

Return Value:

    None

--*/
CPageScaling::CPageScaling(
    __in CONST CPGSCPTProperties& pgscProps
    ) :
    m_pageDimensions(0.0f, 0.0f),
    m_PGSCProps(pgscProps),
    m_bAddCanvas(FALSE),
    m_contentBox(0.0f, 0.0f, 0.0f, 0.0f),
    m_bleedBox(0.0f, 0.0f, 0.0f, 0.0f)
{
}

/*++

Routine Name:

    CPageScaling::~CPageScaling

Routine Description:

    CPageScaling class destructor

Arguments:

    None

Return Value:

    None

--*/
CPageScaling::~CPageScaling()
{
}

/*++

Routine Name:

    CPageScaling::GetFixedPageWidth

Routine Description:

    Creates a string containing the page width in 1/96 Inch
    (Not applicable to Custom Scaling options).

Arguments:

    pbstrWidth - Address of a pointer that will be modified to point to a string
                 that is filled out with the fixed page width.

Return Value:

    HRESULT
    S_OK - On success
    E_*  - On error

--*/
HRESULT
CPageScaling::GetFixedPageWidth(
    __deref_out BSTR* pbstrWidth
    )
{
    HRESULT hr = S_OK;

    if (SUCCEEDED(hr = CHECK_POINTER(pbstrWidth, E_POINTER)))
    {
        try
        {
            SizeF targetPage;
            if (SUCCEEDED(hr = m_PGSCProps.GetPageSize(&targetPage)))
            {
                CStringXDW cstrValue;
                cstrValue.Format(L"%.2f", targetPage.Width);
                *pbstrWidth = cstrValue.AllocSysString();
            }
        }
        catch (CXDException& e)
        {
            hr = e;
        }
    }

    ERR_ON_HR(hr);
    return hr;
}

/*++

Routine Name:

    CPageScaling::GetFixedPageHeight

Routine Description:

    Creates a string containing the page height in 1/96 Inch
    (Not applicable to Custom Scaling options).

Arguments:

    pbstrHeight - Address of a pointer that will be modified to point to a string
                  that is filled out with the fixed page height.

Return Value:

    HRESULT
    S_OK - On success
    E_*  - On error

--*/
HRESULT
CPageScaling::GetFixedPageHeight(
    __deref_out BSTR* pbstrHeight
    )
{
    HRESULT hr = S_OK;

    if (SUCCEEDED(hr = CHECK_POINTER(pbstrHeight, E_POINTER)))
    {
        try
        {
            SizeF targetPage;
            if (SUCCEEDED(hr = m_PGSCProps.GetPageSize(&targetPage)))
            {
                CStringXDW cstrValue;
                cstrValue.Format(L"%.2f", targetPage.Height);
                *pbstrHeight = cstrValue.AllocSysString();
            }
        }
        catch (CXDException& e)
        {
            hr = e;
        }
    }

    ERR_ON_HR(hr);
    return hr;
}

/*++

Routine Name:

    CPageScaling::MatrixToXML

Routine Description:

    Creates a string representation of a Matrix class object.
    The string is suitable for use in XPS markup with the 'RenderTransform' keyword.

Arguments:

    pMatrix - Pointer to a Matrix class object.
    pbstrMatrixXForm - Address of a pointer that will be modified to point to a string
                       that is filled out with the matrix.

Return Value:

    HRESULT
    S_OK - On success
    E_*  - On error

--*/
HRESULT
CPageScaling::MatrixToXML(
    __in        CONST Matrix* pMatrix,
    __deref_out BSTR*         pbstrMatrixXForm
    )
{
    //
    // Construct the matric mark-up from a GDI+ matrix
    //
    HRESULT hr = S_OK;

    if (SUCCEEDED(hr = CHECK_POINTER(pbstrMatrixXForm, E_POINTER)) &&
        SUCCEEDED(hr = CHECK_POINTER(pMatrix, E_POINTER)))
    {
        REAL matElems[6];
        if (Ok == pMatrix->GetElements(matElems))
        {
            try
            {
                CStringXDW cstrMatrix;
                cstrMatrix.Format(L"%.2f,%.2f,%.2f,%.2f,%.2f,%.2f",
                                  matElems[0],
                                  matElems[1],
                                  matElems[2],
                                  matElems[3],
                                  matElems[4],
                                  matElems[5]);

                *pbstrMatrixXForm = cstrMatrix.AllocSysString();
            }
            catch (CXDException& e)
            {
                hr = e;
            }
        }
        else
        {
            *pbstrMatrixXForm = NULL;
            hr = E_FAIL;
        }
    }

    ERR_ON_HR(hr);
    return hr;
}

/*++

Routine Name:

    CPageScaling::SetPageDimensions

Routine Description:

    Used to set the XPS page width and height in the page scaling interface.

Arguments:

    width - Width of the XPS fixed page in 1/96 Inch.
    height - Height of the XPS fixed page in 1/96 Inch.

Return Value:

    HRESULT
    S_OK - On success
    E_*  - On error

--*/
HRESULT
CPageScaling::SetPageDimensions(
    __in CONST REAL width,
    __in CONST REAL height
    )
{
    m_pageDimensions.Width  = width;
    m_pageDimensions.Height = height;

    return S_OK;
}

/*++

Routine Name:

    CPageScaling::SetBleedBox

Routine Description:

    Used to set the XPS BleedBox in the page scaling interface.

Arguments:

    pBleedBox - pointer to a rectangle defining the BleedBox of the XPS page in 1/96 Inch.

Return Value:

    HRESULT
    S_OK - On success
    E_*  - On error

--*/
HRESULT
CPageScaling::SetBleedBox(
    __in RectF*       pBleedBox
    )
{
    HRESULT hr = S_OK;

    if (SUCCEEDED(hr = CHECK_POINTER(pBleedBox, E_POINTER)))
    {
        m_bleedBox = *pBleedBox;
    }

    ERR_ON_HR(hr);
    return hr;
}

/*++

Routine Name:

    CPageScaling::SetContentBox

Routine Description:

    Used to set the XPS ContentBox in the page scaling interface.

Arguments:

    pContentBox - pointer to a rectangle defining the ContentBox of the XPS page in 1/96 Inch.

Return Value:

    HRESULT
    S_OK - On success
    E_*  - On error

--*/
HRESULT
CPageScaling::SetContentBox(
    __in RectF*       pContentBox
    )
{
    HRESULT hr = S_OK;

    if (SUCCEEDED(hr = CHECK_POINTER(pContentBox, E_POINTER)))
    {
        m_contentBox = *pContentBox;
    }

    ERR_ON_HR(hr);
    return hr;