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[QWindowsFontDatabase] Move code around to improve readability

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Keep DirectWrite initialization code in a single place and
fallback to GDI implementation if DirectWrite initialization has failed.

Change-Id: I2da185dbc073c58a7ba47bae09957ecac877d712
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
This commit is contained in:
Konstantin Ritt 2015-02-16 13:02:17 +04:00
parent 4d54fe8d02
commit a2ebd502d4
1 changed files with 30 additions and 44 deletions
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74
src/plugins/platforms/windows/qwindowsfontdatabase.cpp
View File

@ -1682,13 +1682,7 @@ QFontEngine *QWindowsFontDatabase::createEngine(const QFontDef &request,
int dpi,
const QSharedPointer<QWindowsFontEngineData> &data)
{
#if !defined(QT_NO_DIRECTWRITE)
bool useDirectWrite = (request.hintingPreference == QFont::PreferNoHinting)
|| (request.hintingPreference == QFont::PreferVerticalHinting);
IDWriteFont *directWriteFont = 0;
#else
bool useDirectWrite = false;
#endif
QFontEngine *fe = 0;
LOGFONT lf = fontDefToLOGFONT(request);
const bool preferClearTypeAA = lf.lfQuality == CLEARTYPE_QUALITY;
@ -1712,29 +1706,40 @@ QFontEngine *QWindowsFontDatabase::createEngine(const QFontDef &request,
}
#if !defined(QT_NO_DIRECTWRITE)
if (useDirectWrite) {
// Default to false for DirectWrite (and re-enable once/if everything turns out okay)
useDirectWrite = false;
if (initDirectWrite(data.data())) {
const QString fam = QString::fromWCharArray(lf.lfFaceName);
const QString nameSubstitute = QWindowsFontEngineDirectWrite::fontNameSubstitute(fam);
if (nameSubstitute != fam) {
const int nameSubstituteLength = qMin(nameSubstitute.length(), LF_FACESIZE - 1);
memcpy(lf.lfFaceName, nameSubstitute.utf16(), nameSubstituteLength * sizeof(wchar_t));
lf.lfFaceName[nameSubstituteLength] = 0;
bool useDirectWrite = (request.hintingPreference == QFont::PreferNoHinting)
|| (request.hintingPreference == QFont::PreferVerticalHinting);
if (useDirectWrite && initDirectWrite(data.data())) {
const QString fam = QString::fromWCharArray(lf.lfFaceName);
const QString nameSubstitute = QWindowsFontEngineDirectWrite::fontNameSubstitute(fam);
if (nameSubstitute != fam) {
const int nameSubstituteLength = qMin(nameSubstitute.length(), LF_FACESIZE - 1);
memcpy(lf.lfFaceName, nameSubstitute.utf16(), nameSubstituteLength * sizeof(wchar_t));
lf.lfFaceName[nameSubstituteLength] = 0;
}
IDWriteFont *directWriteFont = 0;
HRESULT hr = data->directWriteGdiInterop->CreateFontFromLOGFONT(&lf, &directWriteFont);
if (FAILED(hr)) {
qErrnoWarning("%s: CreateFontFromLOGFONT failed", __FUNCTION__);
} else {
IDWriteFontFace *directWriteFontFace = NULL;
hr = directWriteFont->CreateFontFace(&directWriteFontFace);
if (FAILED(hr)) {
qErrnoWarning("%s: CreateFontFace failed", __FUNCTION__);
} else {
QWindowsFontEngineDirectWrite *fedw = new QWindowsFontEngineDirectWrite(directWriteFontFace,
request.pixelSize,
data);
fedw->initFontInfo(request, dpi, directWriteFont);
fe = fedw;
}
HRESULT hr = data->directWriteGdiInterop->CreateFontFromLOGFONT(&lf, &directWriteFont);
if (FAILED(hr))
qErrnoWarning("%s: CreateFontFromLOGFONT failed", __FUNCTION__);
else
useDirectWrite = true;
directWriteFont->Release();
}
}
#endif
#endif // QT_NO_DIRECTWRITE
QFontEngine *fe = 0;
if (!useDirectWrite) {
if (!fe) {
QWindowsFontEngine *few = new QWindowsFontEngine(request.family, lf, data);
if (preferClearTypeAA)
few->glyphFormat = QFontEngine::Format_A32;
@ -1742,25 +1747,6 @@ QFontEngine *QWindowsFontDatabase::createEngine(const QFontDef &request,
fe = few;
}
#if !defined(QT_NO_DIRECTWRITE)
else {
IDWriteFontFace *directWriteFontFace = NULL;
HRESULT hr = directWriteFont->CreateFontFace(&directWriteFontFace);
if (SUCCEEDED(hr)) {
QWindowsFontEngineDirectWrite *fedw = new QWindowsFontEngineDirectWrite(directWriteFontFace,
request.pixelSize,
data);
fedw->initFontInfo(request, dpi, directWriteFont);
fe = fedw;
} else {
qErrnoWarning("%s: CreateFontFace failed", __FUNCTION__);
}
directWriteFont->Release();
}
#endif
return fe;
}