xref: /trunk/main/vcl/win/source/gdi/salvd.cxx (revision cf6516809c57e1bb0a940545cca99cdad54d4ce2)

/**************************************************************
 *
 * 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_vcl.hxx"

#include <tools/svwin.h>

#include <vcl/sysdata.hxx>

#include <win/wincomp.hxx>
#include <win/saldata.hxx>
#include <win/salinst.h>
#include <win/salgdi.h>
#include <win/salvd.h>

// =======================================================================

static HBITMAP ImplCreateVirDevBitmap( HDC hDC, long nDX, long nDY,
                                       sal_uInt16 nBitCount )
{
    HBITMAP hBitmap;

    if ( nBitCount == 1 )
    {
        hBitmap = CreateBitmap( (int)nDX, (int)nDY, 1, 1, NULL );
    }
    else
    {
        // #146839# Don't use CreateCompatibleBitmap() - there seem to
        // be build-in limits for those HBITMAPs, at least this fails
        // rather often on large displays/multi-monitor setups.
        BITMAPINFO aBitmapInfo;
        aBitmapInfo.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
        aBitmapInfo.bmiHeader.biWidth = nDX;
        aBitmapInfo.bmiHeader.biHeight = nDY;
        aBitmapInfo.bmiHeader.biPlanes = 1;
        aBitmapInfo.bmiHeader.biBitCount = (WORD)GetDeviceCaps( hDC,
                                                                BITSPIXEL );
        aBitmapInfo.bmiHeader.biCompression = BI_RGB;
        aBitmapInfo.bmiHeader.biSizeImage = 0;
        aBitmapInfo.bmiHeader.biXPelsPerMeter = 0;
        aBitmapInfo.bmiHeader.biYPelsPerMeter = 0;
        aBitmapInfo.bmiHeader.biClrUsed = 0;
        aBitmapInfo.bmiHeader.biClrImportant = 0;

        void* pDummy;
        hBitmap = CreateDIBSection( hDC, &aBitmapInfo,
                                    DIB_RGB_COLORS, &pDummy, NULL,
                                    0 );
    }

    return hBitmap;
}

// =======================================================================

SalVirtualDevice* WinSalInstance::CreateVirtualDevice( SalGraphics* pSGraphics,
                                                       long nDX, long nDY,
                                                       sal_uInt16 nBitCount,
                                                       const SystemGraphicsData* pData )
{
    WinSalGraphics* pGraphics = static_cast<WinSalGraphics*>(pSGraphics);

    HDC     hDC = NULL;
    HBITMAP hBmp = NULL;
    sal_Bool    bOk = FALSE;

    if( pData )
    {
        hDC = pData->hDC;
        hBmp = NULL;
        bOk = (hDC != NULL);
    }
    else
    {
        hDC     = CreateCompatibleDC( pGraphics->getHDC() );
        if( !hDC )
            ImplWriteLastError( GetLastError(), "CreateCompatibleDC in CreateVirtualDevice" );

        hBmp    = ImplCreateVirDevBitmap( pGraphics->getHDC(),
                                        nDX, nDY, nBitCount );
        if( !hBmp )
            ImplWriteLastError( GetLastError(), "ImplCreateVirDevBitmap in CreateVirtualDevice" );
        // #124826# continue even if hBmp could not be created
        // if we would return a failure in this case, the process
        // would terminate which is not required

        DBG_ASSERT( hBmp, "WinSalInstance::CreateVirtualDevice(), could not create Bitmap!" );

        bOk = (hDC != NULL);
    }

    if ( bOk )
    {
        WinSalVirtualDevice*    pVDev = new WinSalVirtualDevice;
        SalData*                pSalData = GetSalData();
        WinSalGraphics*         pVirGraphics = new WinSalGraphics;
        pVirGraphics->SetLayout( 0 );   // by default no! mirroring for VirtualDevices, can be enabled with EnableRTL()
        pVirGraphics->setHDC(hDC);
        pVirGraphics->mhWnd    = 0;
        pVirGraphics->mbPrinter = FALSE;
        pVirGraphics->mbVirDev  = TRUE;
        pVirGraphics->mbWindow  = FALSE;
        pVirGraphics->mbScreen  = pGraphics->mbScreen;
        if ( pSalData->mhDitherPal && pVirGraphics->mbScreen )
        {
            pVirGraphics->mhDefPal = SelectPalette( hDC, pSalData->mhDitherPal, TRUE );
            RealizePalette( hDC );
        }
        ImplSalInitGraphics( pVirGraphics );

        pVDev->setHDC(hDC);
        pVDev->mhBmp        = hBmp;
        if( hBmp )
            pVDev->mhDefBmp = SelectBitmap( hDC, hBmp );
        else
            pVDev->mhDefBmp = NULL;
        pVDev->mpGraphics   = pVirGraphics;
        pVDev->mnBitCount   = nBitCount;
        pVDev->mbGraphics   = FALSE;
        pVDev->mbForeignDC  = (pData != NULL);

        // insert VirDev in VirDevList
        pVDev->mpNext = pSalData->mpFirstVD;
        pSalData->mpFirstVD = pVDev;

        return pVDev;
    }
    else
    {
        if ( hDC && !pData )
            DeleteDC( hDC );
        if ( hBmp )
            DeleteBitmap( hBmp );
        return NULL;
    }
}

// -----------------------------------------------------------------------

void WinSalInstance::DestroyVirtualDevice( SalVirtualDevice* pDevice )
{
    delete pDevice;
}

// =======================================================================

WinSalVirtualDevice::WinSalVirtualDevice()
{
    setHDC((HDC)NULL);          // HDC or 0 for Cache Device
    mhBmp = (HBITMAP) NULL;     // Memory Bitmap
    mhDefBmp = (HBITMAP) NULL;  // Default Bitmap
    mpGraphics = NULL;          // current VirDev graphics
    mpNext = NULL;              // next VirDev
    mnBitCount = 0;             // BitCount (0 or 1)
    mbGraphics = FALSE;         // is Graphics used
    mbForeignDC = FALSE;        // uses a foreign DC instead of a bitmap
}

// -----------------------------------------------------------------------

WinSalVirtualDevice::~WinSalVirtualDevice()
{
    // remove VirDev from list of virtual devices
    SalData* pSalData = GetSalData();
    WinSalVirtualDevice** ppVirDev = &pSalData->mpFirstVD;
    for(; (*ppVirDev != this) && *ppVirDev; ppVirDev = &(*ppVirDev)->mpNext );
    if( *ppVirDev )
        *ppVirDev = mpNext;

    // destroy saved DC
    if( mpGraphics->mhDefPal )
        SelectPalette( mpGraphics->getHDC(), mpGraphics->mhDefPal, TRUE );
    ImplSalDeInitGraphics( mpGraphics );
    if( mhDefBmp )
        SelectBitmap( mpGraphics->getHDC(), mhDefBmp );
    if( !mbForeignDC )
        DeleteDC( mpGraphics->getHDC() );
    if( mhBmp )
        DeleteBitmap( mhBmp );
    delete mpGraphics;
    mpGraphics = NULL;
}

// -----------------------------------------------------------------------

SalGraphics* WinSalVirtualDevice::GetGraphics()
{
    if ( mbGraphics )
        return NULL;

    if ( mpGraphics )
        mbGraphics = TRUE;

    return mpGraphics;
}

// -----------------------------------------------------------------------

void WinSalVirtualDevice::ReleaseGraphics( SalGraphics* )
{
    mbGraphics = FALSE;
}

// -----------------------------------------------------------------------

sal_Bool WinSalVirtualDevice::SetSize( long nDX, long nDY )
{
    if( mbForeignDC || !mhBmp )
        return TRUE;    // ???
    else
    {
        HBITMAP hNewBmp = ImplCreateVirDevBitmap( getHDC(), nDX, nDY,
                                              mnBitCount );
        if ( hNewBmp )
        {
            SelectBitmap( getHDC(), hNewBmp );
            DeleteBitmap( mhBmp );
            mhBmp = hNewBmp;
            return TRUE;
        }
        else
        {
            ImplWriteLastError( GetLastError(), "ImplCreateVirDevBitmap in SetSize" );
            return FALSE;
        }
    }
}

void WinSalVirtualDevice::GetSize( long& rWidth, long& rHeight )
{
    rWidth = GetDeviceCaps( getHDC(), HORZRES );
    rHeight= GetDeviceCaps( getHDC(), VERTRES );
}