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BinaryDataContainer: hand out shared_ptr's to SvStreams.

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Hide the SvMemoryStream implementation detail better - this
could be served from a file in future. Also couple lifecycle
of the SvMemoryStream to the vector backing it.

Change-Id: Ia9b28b57b8df4ce57286effd4d1753bf345fc10e
Signed-off-by: Michael Meeks <michael.meeks@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/149917
Tested-by: Jenkins
This commit is contained in:
Michael Meeks 2023-04-01 16:10:33 +01:00
parent 689f0da67b
commit c55d558630
4 changed files with 31 additions and 10 deletions
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6
include/vcl/BinaryDataContainer.hxx
View File

@ -47,8 +47,10 @@ public:
const sal_uInt8* getData() const;
css::uno::Sequence<sal_Int8> getCopyAsByteSequence() const;
// Returns the data as a stream open for reading
SvMemoryStream getMemoryStream();
// Returns the data as a readonly stream open for reading
std::shared_ptr<SvStream> getAsStream();
/// writes the contents to the given stream
std::size_t writeToStream(SvStream& rStream) const;
size_t calculateHash() const;

4
vcl/inc/pdf/ExternalPDFStreams.hxx
View File

@ -38,9 +38,9 @@ struct VCL_DLLPUBLIC ExternalPDFStream
{
if (!mpPDFDocument)
{
SvMemoryStream aPDFStream = maDataContainer.getMemoryStream();
std::shared_ptr<SvStream> aPDFStream = maDataContainer.getAsStream();
auto pPDFDocument = std::make_shared<filter::PDFDocument>();
if (!pPDFDocument->ReadWithPossibleFixup(aPDFStream))
if (!pPDFDocument->ReadWithPossibleFixup(*aPDFStream))
{
SAL_WARN("vcl.pdfwriter",
"PDFWriterImpl::writeReferenceXObject: reading the PDF document failed");

8
vcl/source/filter/graphicfilter.cxx
View File

@ -914,8 +914,8 @@ Graphic GraphicFilter::ImportUnloadedGraphic(SvStream& rIStream, sal_uInt64 size
Size aLogicSize;
if (eLinkType == GfxLinkType::NativeGif)
{
SvMemoryStream aMemoryStream(aGraphicContent.getMemoryStream());
bAnimated = IsGIFAnimated(aMemoryStream, aLogicSize);
std::shared_ptr<SvStream> pMemoryStream = aGraphicContent.getAsStream();
bAnimated = IsGIFAnimated(*pMemoryStream, aLogicSize);
if (!pSizeHint && aLogicSize.getWidth() && aLogicSize.getHeight())
{
pSizeHint = &aLogicSize;
@ -954,8 +954,8 @@ ErrCode GraphicFilter::readPNG(SvStream & rStream, Graphic & rGraphic, GfxLinkTy
if (auto aMSGifChunk = vcl::PngImageReader::getMicrosoftGifChunk(rStream);
!aMSGifChunk.isEmpty())
{
SvMemoryStream aIStrm(aMSGifChunk.getMemoryStream());
ImportGIF(aIStrm, rGraphic);
std::shared_ptr<SvStream> pIStrm(aMSGifChunk.getAsStream());
ImportGIF(*pIStrm, rGraphic);
rLinkType = GfxLinkType::NativeGif;
rpGraphicContent = aMSGifChunk;
return aReturnCode;

23
vcl/source/graphic/BinaryDataContainer.cxx
View File

@ -42,9 +42,28 @@ css::uno::Sequence<sal_Int8> BinaryDataContainer::getCopyAsByteSequence() const
return aData;
}
SvMemoryStream BinaryDataContainer::getMemoryStream()
namespace
{
return SvMemoryStream(mpData ? mpData->data() : nullptr, getSize(), StreamMode::READ);
/*
* Hold a reference on the internal state in case we swap out
* and free the vector while someone holds an SvStream pointer.
*/
class ReferencedMemoryStream : public SvMemoryStream
{
std::shared_ptr<std::vector<sal_uInt8>> mpData;
public:
ReferencedMemoryStream(const std::shared_ptr<std::vector<sal_uInt8>>& rData)
: SvMemoryStream(rData ? rData->data() : nullptr, rData->size(), StreamMode::READ)
, mpData(rData)
{
}
};
}
std::shared_ptr<SvStream> BinaryDataContainer::getAsStream()
{
return std::make_shared<ReferencedMemoryStream>(mpData);
}
std::size_t BinaryDataContainer::writeToStream(SvStream& rStream) const