diff options
Diffstat (limited to 'src/plugins/platforms/windows/qwindowsmime.cpp')
-rw-r--r-- | src/plugins/platforms/windows/qwindowsmime.cpp | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/src/plugins/platforms/windows/qwindowsmime.cpp b/src/plugins/platforms/windows/qwindowsmime.cpp index 8233e82d8e..9f22da17f0 100644 --- a/src/plugins/platforms/windows/qwindowsmime.cpp +++ b/src/plugins/platforms/windows/qwindowsmime.cpp @@ -446,7 +446,7 @@ public: bool QWindowsMimeText::canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const { int cf = getCf(formatetc); - return (cf == CF_UNICODETEXT || cf == CF_TEXT) && mimeData->hasText(); + return (cf == CF_UNICODETEXT || (cf == CF_TEXT && GetACP() != CP_UTF8)) && mimeData->hasText(); } /* @@ -547,7 +547,8 @@ QList<FORMATETC> QWindowsMimeText::formatsForMime(const QString &mimeType, const QList<FORMATETC> formatics; if (mimeType.startsWith(u"text/plain") && mimeData->hasText()) { formatics += setCf(CF_UNICODETEXT); - formatics += setCf(CF_TEXT); + if (GetACP() != CP_UTF8) + formatics += setCf(CF_TEXT); } return formatics; } @@ -906,6 +907,7 @@ public: QVariant convertToMime(const QString &mime, IDataObject *pDataObj, QMetaType preferredType) const override; QString mimeForFormat(const FORMATETC &formatetc) const override; private: + bool hasOriginalDIBV5(IDataObject *pDataObj) const; UINT CF_PNG; }; @@ -987,15 +989,41 @@ bool QWindowsMimeImage::convertFromMime(const FORMATETC &formatetc, const QMimeD return false; } +bool QWindowsMimeImage::hasOriginalDIBV5(IDataObject *pDataObj) const +{ + bool isSynthesized = true; + IEnumFORMATETC *pEnum = nullptr; + HRESULT res = pDataObj->EnumFormatEtc(1, &pEnum); + if (res == S_OK && pEnum) { + FORMATETC fc; + while ((res = pEnum->Next(1, &fc, nullptr)) == S_OK) { + if (fc.ptd) + CoTaskMemFree(fc.ptd); + if (fc.cfFormat == CF_DIB) + break; + if (fc.cfFormat == CF_DIBV5) { + isSynthesized = false; + break; + } + } + pEnum->Release(); + } + return !isSynthesized; +} + QVariant QWindowsMimeImage::convertToMime(const QString &mimeType, IDataObject *pDataObj, QMetaType preferredType) const { Q_UNUSED(preferredType); QVariant result; if (mimeType != u"application/x-qt-image") return result; - //Try to convert from DIBV5 as it is the most - //widespread format that support transparency - if (canGetData(CF_DIBV5, pDataObj)) { + // Try to convert from DIBV5 as it is the most widespread format that supports transparency, + // but avoid synthesizing it, as that typically loses transparency, e.g. from Office + const bool canGetDibV5 = canGetData(CF_DIBV5, pDataObj); + const bool hasOrigDibV5 = canGetDibV5 ? hasOriginalDIBV5(pDataObj) : false; + qCDebug(lcQpaMime) << "canGetDibV5:" << canGetDibV5 << "hasOrigDibV5:" << hasOrigDibV5; + if (hasOrigDibV5) { + qCDebug(lcQpaMime) << "Decoding DIBV5"; QImage img; QByteArray data = getData(CF_DIBV5, pDataObj); QBuffer buffer(&data); @@ -1004,6 +1032,7 @@ QVariant QWindowsMimeImage::convertToMime(const QString &mimeType, IDataObject * } //PNG, MS Office place this (undocumented) if (canGetData(CF_PNG, pDataObj)) { + qCDebug(lcQpaMime) << "Decoding PNG"; QImage img; QByteArray data = getData(CF_PNG, pDataObj); if (img.loadFromData(data, "PNG")) { @@ -1012,6 +1041,7 @@ QVariant QWindowsMimeImage::convertToMime(const QString &mimeType, IDataObject * } //Fallback to DIB if (canGetData(CF_DIB, pDataObj)) { + qCDebug(lcQpaMime) << "Decoding DIB"; QImage img; QByteArray data = getData(CF_DIBV5, pDataObj); QBuffer buffer(&data); |