a214ac6774
(*) Make all of it use a "Scoped" paradigm (*) pass by value, no need to allocate on heap (*) make all of the construction go via the *Access constructors, instead of it being some via the constructors and some via the Acquire*Access methods. (*) take the Bitmap& by const& in the constructor, so we can avoid doing const_cast in random places. Change-Id: Ie03a9145c0965980ee8df9a89b8714a425e18f74 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160293 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
307 lines
12 KiB
C++
307 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <basegfx/numeric/ftools.hxx>
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#include <com/sun/star/lang/XServiceInfo.hpp>
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#include <com/sun/star/rendering/XIntegerBitmap.hpp>
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#include <comphelper/diagnose_ex.hxx>
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#include <vcl/bitmap.hxx>
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#include <vcl/bitmapex.hxx>
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#include <vcl/BitmapReadAccess.hxx>
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#include <vcl/canvastools.hxx>
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#include "dx_impltools.hxx"
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#include "dx_vcltools.hxx"
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using namespace ::com::sun::star;
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namespace dxcanvas::tools
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{
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namespace
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{
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/// Calc number of colors in given BitmapInfoHeader
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sal_Int32 calcDIBColorCount( const BITMAPINFOHEADER& rBIH )
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{
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if( rBIH.biSize != sizeof( BITMAPCOREHEADER ) )
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{
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if( rBIH.biBitCount <= 8 )
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{
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if( rBIH.biClrUsed )
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return rBIH.biClrUsed;
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else
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return 1 << rBIH.biBitCount;
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}
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}
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else
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{
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BITMAPCOREHEADER const * pCoreHeader = reinterpret_cast<BITMAPCOREHEADER const *>(&rBIH);
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if( pCoreHeader->bcBitCount <= 8 )
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return 1 << pCoreHeader->bcBitCount;
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}
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return 0; // nothing known
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}
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/// Draw DI bits to given Graphics
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bool drawDIBits( const std::shared_ptr< Gdiplus::Graphics >& rGraphics,
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const void* hDIB )
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{
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bool bRet( false );
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const BITMAPINFO* pBI = static_cast<BITMAPINFO*>(GlobalLock( const_cast<void *>(hDIB) ));
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if( pBI )
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{
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const BYTE* pBits = reinterpret_cast<BYTE const *>(pBI) + pBI->bmiHeader.biSize +
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calcDIBColorCount( pBI->bmiHeader ) * sizeof( RGBQUAD );
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// forward to outsourced GDI+ rendering method
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// (header clashes)
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bRet = tools::drawDIBits( rGraphics, *pBI, pBits );
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GlobalUnlock( const_cast<void *>(hDIB) );
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}
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return bRet;
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}
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/** Draw VCL bitmap to given Graphics
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@param rBmp
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Reference to bitmap. Might get modified, in such a way
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that it will hold a DIB after a successful function call.
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*/
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bool drawVCLBitmap( const std::shared_ptr< Gdiplus::Graphics >& rGraphics,
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::Bitmap& rBmp )
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{
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BitmapSystemData aBmpSysData;
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if( !rBmp.GetSystemData( aBmpSysData ) ||
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!aBmpSysData.pDIB )
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{
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// first of all, ensure that Bitmap contains a DIB, by
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// acquiring a read access
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BitmapScopedReadAccess pReadAcc(rBmp);
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// TODO(P2): Acquiring a read access can actually
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// force a read from VRAM, thus, avoiding this
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// step somehow will increase performance
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// here.
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if( pReadAcc )
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{
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// try again: now, WinSalBitmap must have
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// generated a DIB
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if( rBmp.GetSystemData( aBmpSysData ) &&
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aBmpSysData.pDIB )
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{
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return drawDIBits( rGraphics,
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aBmpSysData.pDIB );
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}
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}
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}
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else
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{
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return drawDIBits( rGraphics,
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aBmpSysData.pDIB );
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}
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// failed to generate DIBits from vcl bitmap
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return false;
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}
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/** Create a chunk of raw RGBA data GDI+ Bitmap from VCL BitmapEx
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*/
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RawRGBABitmap bitmapFromVCLBitmapEx( const ::BitmapEx& rBmpEx )
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{
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// TODO(P2): Avoid temporary bitmap generation, maybe
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// even ensure that created DIBs are copied back to
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// BmpEx (currently, every AcquireReadAccess() will
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// make the local bitmap copy unique, effectively
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// duplicating the memory used)
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ENSURE_OR_THROW( rBmpEx.IsAlpha(),
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"::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
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"BmpEx has no alpha" );
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// convert transparent bitmap to 32bit RGBA
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// ========================================
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const ::Size aBmpSize( rBmpEx.GetSizePixel() );
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RawRGBABitmap aBmpData;
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aBmpData.mnWidth = aBmpSize.Width();
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aBmpData.mnHeight = aBmpSize.Height();
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aBmpData.maBitmapData.resize(4*aBmpData.mnWidth*aBmpData.mnHeight);
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Bitmap aBitmap( rBmpEx.GetBitmap() );
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BitmapScopedReadAccess pReadAccess( aBitmap );
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const sal_Int32 nWidth( aBmpSize.Width() );
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const sal_Int32 nHeight( aBmpSize.Height() );
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ENSURE_OR_THROW( pReadAccess.get() != nullptr,
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"::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
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"Unable to acquire read access to bitmap" );
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Bitmap aAlpha( rBmpEx.GetAlphaMask().GetBitmap() );
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BitmapScopedReadAccess pAlphaReadAccess( aAlpha );
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// By convention, the access buffer always has
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// one of the following formats:
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// ScanlineFormat::N1BitMsbPal
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// ScanlineFormat::N8BitPal
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// ScanlineFormat::N24BitTcBgr
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// ScanlineFormat::N32BitTcMask
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// and is always ScanlineFormat::BottomUp
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// This is the way
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// WinSalBitmap::AcquireBuffer() sets up the
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// buffer
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ENSURE_OR_THROW( pAlphaReadAccess.get() != nullptr,
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"::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
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"Unable to acquire read access to alpha" );
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ENSURE_OR_THROW( pAlphaReadAccess->GetScanlineFormat() == ScanlineFormat::N8BitPal,
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"::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
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"Unsupported alpha scanline format" );
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BitmapColor aCol;
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sal_uInt8* pCurrOutput(aBmpData.maBitmapData.data());
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int x, y;
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for( y=0; y<nHeight; ++y )
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{
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switch( pReadAccess->GetScanlineFormat() )
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{
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case ScanlineFormat::N8BitPal:
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{
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Scanline pScan = pReadAccess->GetScanline( y );
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Scanline pAScan = pAlphaReadAccess->GetScanline( y );
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for( x=0; x<nWidth; ++x )
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{
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aCol = pReadAccess->GetPaletteColor( *pScan++ );
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*pCurrOutput++ = aCol.GetBlue();
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*pCurrOutput++ = aCol.GetGreen();
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*pCurrOutput++ = aCol.GetRed();
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*pCurrOutput++ = static_cast<BYTE>(*pAScan++);
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}
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}
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break;
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case ScanlineFormat::N24BitTcBgr:
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{
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Scanline pScan = pReadAccess->GetScanline( y );
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Scanline pAScan = pAlphaReadAccess->GetScanline( y );
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for( x=0; x<nWidth; ++x )
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{
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// store as RGBA
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*pCurrOutput++ = *pScan++;
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*pCurrOutput++ = *pScan++;
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*pCurrOutput++ = *pScan++;
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*pCurrOutput++ = static_cast<BYTE>(*pAScan++);
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}
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}
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break;
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// TODO(P2): Might be advantageous
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// to hand-formulate the following
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// formats, too.
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case ScanlineFormat::N1BitMsbPal:
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case ScanlineFormat::N32BitTcMask:
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{
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Scanline pAScan = pAlphaReadAccess->GetScanline( y );
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// using fallback for those
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// seldom formats
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for( x=0; x<nWidth; ++x )
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{
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// yes. x and y are swapped on Get/SetPixel
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aCol = pReadAccess->GetColor(y,x);
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*pCurrOutput++ = aCol.GetBlue();
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*pCurrOutput++ = aCol.GetGreen();
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*pCurrOutput++ = aCol.GetRed();
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*pCurrOutput++ = static_cast<BYTE>(*pAScan++);
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}
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}
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break;
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case ScanlineFormat::N24BitTcRgb:
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case ScanlineFormat::N32BitTcAbgr:
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case ScanlineFormat::N32BitTcArgb:
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case ScanlineFormat::N32BitTcBgra:
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case ScanlineFormat::N32BitTcRgba:
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default:
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ENSURE_OR_THROW( false,
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"::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
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"Unexpected scanline format - has "
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"WinSalBitmap::AcquireBuffer() changed?" );
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}
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}
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return aBmpData;
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}
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bool drawVCLBitmapEx( const std::shared_ptr< Gdiplus::Graphics >& rGraphics,
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const ::BitmapEx& rBmpEx )
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{
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if( !rBmpEx.IsAlpha() )
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{
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Bitmap aBmp( rBmpEx.GetBitmap() );
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return drawVCLBitmap( rGraphics, aBmp );
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}
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else
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{
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return drawRGBABits( rGraphics,
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bitmapFromVCLBitmapEx( rBmpEx ) );
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}
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}
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}
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bool drawVCLBitmapFromXBitmap( const std::shared_ptr< Gdiplus::Graphics >& rGraphics,
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const uno::Reference< rendering::XBitmap >& xBitmap )
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{
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// TODO(F2): add support for floating point bitmap formats
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uno::Reference< rendering::XIntegerReadOnlyBitmap > xIntBmp(
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xBitmap, uno::UNO_QUERY );
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if( !xIntBmp.is() )
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return false;
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::BitmapEx aBmpEx = vcl::unotools::bitmapExFromXBitmap( xIntBmp );
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if( aBmpEx.IsEmpty() )
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return false;
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return drawVCLBitmapEx( rGraphics, aBmpEx );
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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