diff options
author | Friedemann Kleint <Friedemann.Kleint@theqtcompany.com> | 2015-12-01 16:43:18 +0100 |
---|---|---|
committer | Friedemann Kleint <Friedemann.Kleint@theqtcompany.com> | 2015-12-02 15:13:57 +0000 |
commit | 1b6f705ca73f67e91bd75daabeb1945dce4aefb2 (patch) | |
tree | 2275e180e3fc5f80bb57ff48360584fc12289b48 /src | |
parent | ad963ef05beeeb86e5c37567ee868b695b66b9fb (diff) |
Windows: Load DirectWrite dynamically.
DirectWrite is not supported on Windows XP.
Task-number: QTBUG-49711
Change-Id: Ie1df6250814226d53fe4fb3a1c6bd024f6018796
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
Diffstat (limited to 'src')
-rw-r--r-- | src/plugins/platforms/windows/qwindowsfontdatabase.cpp | 52 | ||||
-rw-r--r-- | src/plugins/platforms/windows/windows.pri | 1 |
2 files changed, 37 insertions, 16 deletions
diff --git a/src/plugins/platforms/windows/qwindowsfontdatabase.cpp b/src/plugins/platforms/windows/qwindowsfontdatabase.cpp index c8eaccd956..334c6a9407 100644 --- a/src/plugins/platforms/windows/qwindowsfontdatabase.cpp +++ b/src/plugins/platforms/windows/qwindowsfontdatabase.cpp @@ -46,6 +46,7 @@ #include <QtCore/QDebug> #include <QtCore/QtEndian> #include <QtCore/QThreadStorage> +#include <QtCore/private/qsystemlibrary_p.h> #include <wchar.h> @@ -60,6 +61,38 @@ QT_BEGIN_NAMESPACE +#ifndef QT_NO_DIRECTWRITE +// ### fixme: Consider direct linking of dwrite.dll once Windows Vista pre SP2 is dropped (QTBUG-49711) + +typedef HRESULT (WINAPI *DWriteCreateFactoryType)(DWRITE_FACTORY_TYPE, const IID &, IUnknown **); + +static inline DWriteCreateFactoryType resolveDWriteCreateFactory() +{ + if (QSysInfo::windowsVersion() < QSysInfo::WV_VISTA) + return Q_NULLPTR; + QSystemLibrary library(QStringLiteral("dwrite")); + QFunctionPointer result = library.resolve("DWriteCreateFactory"); + if (Q_UNLIKELY(!result)) { + qWarning("Unable to load dwrite.dll"); + return Q_NULLPTR; + } + return reinterpret_cast<DWriteCreateFactoryType>(result); +} + +static IDWriteFactory *createDirectWriteFactory() +{ + static const DWriteCreateFactoryType dWriteCreateFactory = resolveDWriteCreateFactory(); + if (!dWriteCreateFactory) + return Q_NULLPTR; + IUnknown *result = Q_NULLPTR; + if (FAILED(dWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED, __uuidof(IDWriteFactory), &result))) { + qErrnoWarning("DWriteCreateFactory failed"); + return Q_NULLPTR; + } + return reinterpret_cast<IDWriteFactory *>(result); +} +#endif // !QT_NO_DIRECTWRITE + // Helper classes for creating font engines directly from font data namespace { @@ -466,14 +499,9 @@ namespace { class CustomFontFileLoader { public: - CustomFontFileLoader() : m_directWriteFactory(0), m_directWriteFontFileLoader(0) + CustomFontFileLoader() : m_directWriteFactory(createDirectWriteFactory()), m_directWriteFontFileLoader(0) { - HRESULT hres = DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED, - __uuidof(IDWriteFactory), - reinterpret_cast<IUnknown **>(&m_directWriteFactory)); - if (FAILED(hres)) { - qErrnoWarning(hres, "%s: DWriteCreateFactory failed.", __FUNCTION__); - } else { + if (m_directWriteFactory) { m_directWriteFontFileLoader = new DirectWriteFontFileLoader(); m_directWriteFactory->RegisterFontFileLoader(m_directWriteFontFileLoader); } @@ -571,15 +599,9 @@ qreal QWindowsFontDatabase::fontSmoothingGamma() static inline bool initDirectWrite(QWindowsFontEngineData *d) { if (!d->directWriteFactory) { - const HRESULT hr = DWriteCreateFactory( - DWRITE_FACTORY_TYPE_SHARED, - __uuidof(IDWriteFactory), - reinterpret_cast<IUnknown **>(&d->directWriteFactory) - ); - if (FAILED(hr)) { - qErrnoWarning("%s: DWriteCreateFactory failed", __FUNCTION__); + d->directWriteFactory = createDirectWriteFactory(); + if (!d->directWriteFactory) return false; - } } if (!d->directWriteGdiInterop) { const HRESULT hr = d->directWriteFactory->GetGdiInterop(&d->directWriteGdiInterop); diff --git a/src/plugins/platforms/windows/windows.pri b/src/plugins/platforms/windows/windows.pri index 065108cb03..67af5c03ef 100644 --- a/src/plugins/platforms/windows/windows.pri +++ b/src/plugins/platforms/windows/windows.pri @@ -13,7 +13,6 @@ wince: DEFINES *= QT_LIBINFIX=L"\"\\\"$${QT_LIBINFIX}\\\"\"" DEFINES *= QT_NO_CAST_FROM_ASCII contains(QT_CONFIG, directwrite) { - LIBS *= -ldwrite SOURCES += $$PWD/qwindowsfontenginedirectwrite.cpp HEADERS += $$PWD/qwindowsfontenginedirectwrite.h } else { |