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loongoffice/forms/source/component/imgprod.cxx
Noel Grandin ddd2639a48 drop mask from BitmapEx 
So that we have fewer cases to deal with when we transition to
32-bit bitmaps.

(*) rename maMask to maAlphaMask, since now it is only being used
for alpha duties.
(*) drop mbAlpha and mbTransparent to simplify state management,
the only thing we need to check for alpha is if maAlphaMask is
non-empty.

Change-Id: I06252e38e950e846a94b4c2ba8ea763be17801fe
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111679
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
2021-04-26 12:51:58 +02:00

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/* -*- 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 "imgprod.hxx"
#include <osl/diagnose.h>
#include <tools/debug.hxx>
#include <vcl/BitmapReadAccess.hxx>
#include <vcl/cvtgrf.hxx>
#include <vcl/svapp.hxx>
#include <unotools/ucbstreamhelper.hxx>
#include <cppuhelper/queryinterface.hxx>
#include <com/sun/star/awt/ImageStatus.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <svtools/imageresourceaccess.hxx>
#include <comphelper/processfactory.hxx>
namespace {
class ImgProdLockBytes : public SvLockBytes
{
css::uno::Reference< css::io::XInputStream > xStmRef;
css::uno::Sequence<sal_Int8> maSeq;
public:
ImgProdLockBytes( SvStream* pStm, bool bOwner );
explicit ImgProdLockBytes( css::uno::Reference< css::io::XInputStream > const & rStreamRef );
virtual ErrCode ReadAt( sal_uInt64 nPos, void* pBuffer, std::size_t nCount, std::size_t * pRead ) const override;
virtual ErrCode WriteAt( sal_uInt64 nPos, const void* pBuffer, std::size_t nCount, std::size_t * pWritten ) override;
virtual ErrCode Flush() const override;
virtual ErrCode SetSize( sal_uInt64 nSize ) override;
virtual ErrCode Stat( SvLockBytesStat* ) const override;
};
}
ImgProdLockBytes::ImgProdLockBytes( SvStream* pStm, bool bOwner ) :
SvLockBytes( pStm, bOwner )
{
}
ImgProdLockBytes::ImgProdLockBytes( css::uno::Reference< css::io::XInputStream > const & rStmRef ) :
xStmRef( rStmRef )
{
if( !xStmRef.is() )
return;
const sal_uInt32 nBytesToRead = 65535;
sal_uInt32 nRead;
do
{
css::uno::Sequence< sal_Int8 > aReadSeq;
nRead = xStmRef->readSomeBytes( aReadSeq, nBytesToRead );
if( nRead )
{
const sal_uInt32 nOldLength = maSeq.getLength();
maSeq.realloc( nOldLength + nRead );
memcpy( maSeq.getArray() + nOldLength, aReadSeq.getConstArray(), aReadSeq.getLength() );
}
}
while( nBytesToRead == nRead );
}
ErrCode ImgProdLockBytes::ReadAt(sal_uInt64 const nPos,
void* pBuffer, std::size_t nCount, std::size_t * pRead) const
{
if( GetStream() )
{
const_cast<SvStream*>(GetStream())->ResetError();
const ErrCode nErr = SvLockBytes::ReadAt( nPos, pBuffer, nCount, pRead );
const_cast<SvStream*>(GetStream())->ResetError();
return nErr;
}
else
{
const std::size_t nSeqLen = maSeq.getLength();
if( nPos < nSeqLen )
{
if( ( nPos + nCount ) > nSeqLen )
nCount = nSeqLen - nPos;
memcpy( pBuffer, maSeq.getConstArray() + nPos, nCount );
*pRead = nCount;
}
else
*pRead = 0;
return ERRCODE_NONE;
}
}
ErrCode ImgProdLockBytes::WriteAt(sal_uInt64 const nPos,
const void* pBuffer, std::size_t nCount, std::size_t * pWritten)
{
if( GetStream() )
return SvLockBytes::WriteAt( nPos, pBuffer, nCount, pWritten );
else
{
DBG_ASSERT( xStmRef.is(), "ImgProdLockBytes::WriteAt: xInputStream has no reference..." );
return ERRCODE_IO_CANTWRITE;
}
}
ErrCode ImgProdLockBytes::Flush() const
{
return ERRCODE_NONE;
}
ErrCode ImgProdLockBytes::SetSize(sal_uInt64 const nSize)
{
if( GetStream() )
return SvLockBytes::SetSize( nSize );
else
{
OSL_FAIL( "ImgProdLockBytes::SetSize not supported for xInputStream..." );
return ERRCODE_IO_CANTWRITE;
}
}
ErrCode ImgProdLockBytes::Stat( SvLockBytesStat* pStat ) const
{
if( GetStream() )
return SvLockBytes::Stat( pStat );
else
{
DBG_ASSERT( xStmRef.is(), "ImgProdLockBytes::Stat: xInputStream has no reference..." );
pStat->nSize = maSeq.getLength();
return ERRCODE_NONE;
}
}
ImageProducer::ImageProducer()
: mnTransIndex(0)
, mbConsInit(false)
{
mpGraphic.reset( new Graphic );
}
ImageProducer::~ImageProducer()
{
}
// XInterface
css::uno::Any ImageProducer::queryInterface( const css::uno::Type & rType )
{
css::uno::Any aRet = ::cppu::queryInterface( rType,
static_cast< css::lang::XInitialization* >(this),
static_cast< css::awt::XImageProducer* >(this) );
return (aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType ));
}
void ImageProducer::addConsumer( const css::uno::Reference< css::awt::XImageConsumer >& rxConsumer )
{
DBG_ASSERT( rxConsumer.is(), "::AddConsumer(...): No consumer referenced!" );
if( rxConsumer.is() )
maConsList.push_back( rxConsumer );
}
void ImageProducer::removeConsumer( const css::uno::Reference< css::awt::XImageConsumer >& rxConsumer )
{
ConsumerList_t::reverse_iterator riter = std::find(maConsList.rbegin(),maConsList.rend(),rxConsumer);
if (riter != maConsList.rend())
maConsList.erase(riter.base()-1);
}
void ImageProducer::SetImage( const OUString& rPath )
{
maURL = rPath;
mpGraphic->Clear();
mbConsInit = false;
mpStm.reset();
if ( ::svt::GraphicAccess::isSupportedURL( maURL ) )
{
mpStm = ::svt::GraphicAccess::getImageStream( ::comphelper::getProcessComponentContext(), maURL );
}
else if( !maURL.isEmpty() )
{
std::unique_ptr<SvStream> pIStm = ::utl::UcbStreamHelper::CreateStream( maURL, StreamMode::STD_READ );
if (pIStm)
mpStm.reset( new SvStream( new ImgProdLockBytes( pIStm.release(), true ) ) );
}
}
void ImageProducer::SetImage( SvStream& rStm )
{
maURL.clear();
mpGraphic->Clear();
mbConsInit = false;
mpStm.reset( new SvStream( new ImgProdLockBytes( &rStm, false ) ) );
}
void ImageProducer::setImage( css::uno::Reference< css::io::XInputStream > const & rInputStmRef )
{
maURL.clear();
mpGraphic->Clear();
mbConsInit = false;
mpStm.reset();
if( rInputStmRef.is() )
mpStm.reset( new SvStream( new ImgProdLockBytes( rInputStmRef ) ) );
}
void ImageProducer::NewDataAvailable()
{
if( ( GraphicType::NONE == mpGraphic->GetType() ) || mpGraphic->GetReaderContext() )
startProduction();
}
void ImageProducer::startProduction()
{
if( maConsList.empty() && !maDoneHdl.IsSet() )
return;
bool bNotifyEmptyGraphics = false;
// valid stream or filled graphic? => update consumers
if( mpStm || ( mpGraphic->GetType() != GraphicType::NONE ) )
{
// if we already have a graphic, we don't have to import again;
// graphic is cleared if a new Stream is set
if( ( mpGraphic->GetType() == GraphicType::NONE ) || mpGraphic->GetReaderContext() )
{
if ( ImplImportGraphic( *mpGraphic ) )
maDoneHdl.Call( mpGraphic.get() );
}
if( mpGraphic->GetType() != GraphicType::NONE )
ImplUpdateData( *mpGraphic );
else
bNotifyEmptyGraphics = true;
}
else
bNotifyEmptyGraphics = true;
if ( !bNotifyEmptyGraphics )
return;
// reset image
// create temporary list to hold interfaces
ConsumerList_t aTmp = maConsList;
// iterate through interfaces
for (auto const& elem : aTmp)
{
elem->init( 0, 0 );
elem->complete( css::awt::ImageStatus::IMAGESTATUS_STATICIMAGEDONE, this );
}
maDoneHdl.Call( nullptr );
}
bool ImageProducer::ImplImportGraphic( Graphic& rGraphic )
{
if (!mpStm)
return false;
if( ERRCODE_IO_PENDING == mpStm->GetError() )
mpStm->ResetError();
mpStm->Seek( 0 );
bool bRet = GraphicConverter::Import( *mpStm, rGraphic ) == ERRCODE_NONE;
if( ERRCODE_IO_PENDING == mpStm->GetError() )
mpStm->ResetError();
return bRet;
}
void ImageProducer::ImplUpdateData( const Graphic& rGraphic )
{
ImplInitConsumer( rGraphic );
if( mbConsInit && !maConsList.empty() )
{
// create temporary list to hold interfaces
ConsumerList_t aTmp = maConsList;
ImplUpdateConsumer( rGraphic );
mbConsInit = false;
// iterate through interfaces
for (auto const& elem : aTmp)
elem->complete( css::awt::ImageStatus::IMAGESTATUS_STATICIMAGEDONE, this );
}
}
void ImageProducer::ImplInitConsumer( const Graphic& rGraphic )
{
sal_uInt32 nRMask = 0;
sal_uInt32 nGMask = 0;
sal_uInt32 nBMask = 0;
sal_uInt32 nAMask = 0;
sal_uInt32 nWidth = 0;
sal_uInt32 nHeight = 0;
sal_uInt8 nBitCount = 0;
css::uno::Sequence< sal_Int32 > aRGBPal;
rGraphic.GetBitmapEx().GetColorModel(aRGBPal, nRMask, nGMask, nBMask, nAMask, mnTransIndex, nWidth, nHeight, nBitCount);
// create temporary list to hold interfaces
ConsumerList_t aTmp = maConsList;
// iterate through interfaces
for (auto const& elem : aTmp)
{
elem->init( nWidth, nHeight );
elem->setColorModel( nBitCount,aRGBPal, nRMask, nGMask, nBMask, nAMask );
}
mbConsInit = true;
}
void ImageProducer::ImplUpdateConsumer( const Graphic& rGraphic )
{
BitmapEx aBmpEx( rGraphic.GetBitmapEx() );
Bitmap aBmp( aBmpEx.GetBitmap() );
BitmapReadAccess* pBmpAcc = aBmp.AcquireReadAccess();
if( !pBmpAcc )
return;
Bitmap aMask( aBmpEx.GetAlpha() );
BitmapReadAccess* pMskAcc = !aMask.IsEmpty() ? aMask.AcquireReadAccess() : nullptr;
const tools::Long nWidth = pBmpAcc->Width();
const tools::Long nHeight = pBmpAcc->Height();
const tools::Long nStartX = 0;
const tools::Long nEndX = nWidth - 1;
const tools::Long nStartY = 0;
const tools::Long nEndY = nHeight - 1;
const tools::Long nPartWidth = nEndX - nStartX + 1;
const tools::Long nPartHeight = nEndY - nStartY + 1;
if( !pMskAcc )
{
aMask = Bitmap(aBmp.GetSizePixel(), vcl::PixelFormat::N1_BPP);
aMask.Erase( COL_BLACK );
pMskAcc = aMask.AcquireReadAccess();
}
// create temporary list to hold interfaces
ConsumerList_t aTmp = maConsList;
if( pBmpAcc->HasPalette() )
{
const BitmapColor aWhite( pMskAcc->GetBestMatchingColor( COL_WHITE ) );
if( mnTransIndex < 256 )
{
css::uno::Sequence<sal_Int8> aData( nPartWidth * nPartHeight );
sal_Int8* pTmp = aData.getArray();
for( tools::Long nY = nStartY; nY <= nEndY; nY++ )
{
Scanline pScanlineMask = pMskAcc->GetScanline( nY );
Scanline pScanline = pBmpAcc->GetScanline( nY );
for( tools::Long nX = nStartX; nX <= nEndX; nX++ )
{
if( pMskAcc->GetPixelFromData( pScanlineMask, nX ) == aWhite )
*pTmp++ = sal::static_int_cast< sal_Int8 >(
mnTransIndex );
else
*pTmp++ = pBmpAcc->GetPixelFromData( pScanline, nX ).GetIndex();
}
}
// iterate through interfaces
for (auto const& elem : aTmp)
elem->setPixelsByBytes( nStartX, nStartY, nPartWidth, nPartHeight, aData, 0UL, nPartWidth );
}
else
{
css::uno::Sequence<sal_Int32> aData( nPartWidth * nPartHeight );
sal_Int32* pTmp = aData.getArray();
for( tools::Long nY = nStartY; nY <= nEndY; nY++ )
{
Scanline pScanlineMask = pMskAcc->GetScanline( nY );
Scanline pScanline = pBmpAcc->GetScanline( nY );
for( tools::Long nX = nStartX; nX <= nEndX; nX++ )
{
if( pMskAcc->GetPixelFromData( pScanlineMask, nX ) == aWhite )
*pTmp++ = mnTransIndex;
else
*pTmp++ = pBmpAcc->GetPixelFromData( pScanline, nX ).GetIndex();
}
}
// iterate through interfaces
for (auto const& elem : aTmp)
elem->setPixelsByLongs( nStartX, nStartY, nPartWidth, nPartHeight, aData, 0UL, nPartWidth );
}
}
else
{
css::uno::Sequence<sal_Int32> aData( nPartWidth * nPartHeight );
const BitmapColor aWhite( pMskAcc->GetBestMatchingColor( COL_WHITE ) );
sal_Int32* pTmp = aData.getArray();
for( tools::Long nY = nStartY; nY <= nEndY; nY++ )
{
Scanline pScanlineMask = pMskAcc->GetScanline( nY );
Scanline pScanline = pBmpAcc->GetScanline( nY );
for( tools::Long nX = nStartX; nX <= nEndX; nX++, pTmp++ )
{
const BitmapColor aCol( pBmpAcc->GetPixelFromData( pScanline, nX ) );
*pTmp = static_cast<sal_Int32>(aCol.GetRed()) << 24;
*pTmp |= static_cast<sal_Int32>(aCol.GetGreen()) << 16;
*pTmp |= static_cast<sal_Int32>(aCol.GetBlue()) << 8;
if( pMskAcc->GetPixelFromData( pScanlineMask, nX ) != aWhite )
*pTmp |= 0x000000ffUL;
}
}
// iterate through interfaces
for (auto const& elem : aTmp)
elem->setPixelsByLongs( nStartX, nStartY, nPartWidth, nPartHeight, aData, 0UL, nPartWidth );
}
Bitmap::ReleaseAccess( pBmpAcc );
Bitmap::ReleaseAccess( pMskAcc );
}
void ImageProducer::initialize( const css::uno::Sequence< css::uno::Any >& aArguments )
{
if ( aArguments.getLength() == 1 )
{
css::uno::Any aArg = aArguments.getConstArray()[0];
OUString aURL;
if ( aArg >>= aURL )
{
SetImage( aURL );
}
}
}
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
com_sun_star_form_ImageProducer_get_implementation(css::uno::XComponentContext*,
css::uno::Sequence<css::uno::Any> const &)
{
return cppu::acquire(new ImageProducer());
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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