diff options
Diffstat (limited to 'src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp')
-rw-r--r-- | src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp | 478 |
1 files changed, 478 insertions, 0 deletions
diff --git a/src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp b/src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp new file mode 100644 index 0000000000..d2fb909dea --- /dev/null +++ b/src/gui/text/windows/qwindowsdirectwritefontdatabase.cpp @@ -0,0 +1,478 @@ +/**************************************************************************** +** +** Copyright (C) 2020 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qwindowsdirectwritefontdatabase_p.h" +#include "qwindowsfontenginedirectwrite_p.h" +#include "qwindowsfontdatabase_p.h" + +#include <QtCore/qendian.h> +#include <QtCore/qfile.h> +#include <QtCore/qstringbuilder.h> +#include <QtCore/qvarlengtharray.h> + +#include <dwrite_3.h> +#include <d2d1.h> + +QT_BEGIN_NAMESPACE + +#ifdef QT_USE_DIRECTWRITE3 + +// Defined in gui/text/qfontdatabase.cpp +Q_GUI_EXPORT QFontDatabase::WritingSystem qt_writing_system_for_script(int script); + +QWindowsDirectWriteFontDatabase::QWindowsDirectWriteFontDatabase() +{ + qCDebug(lcQpaFonts) << "Creating DirectWrite database"; +} + +QWindowsDirectWriteFontDatabase::~QWindowsDirectWriteFontDatabase() +{ + for (auto it = m_populatedFonts.begin(); it != m_populatedFonts.end(); ++it) + it.value()->Release(); +} + +QString QWindowsDirectWriteFontDatabase::localeString(IDWriteLocalizedStrings *names, + wchar_t localeName[]) +{ + uint index; + BOOL exists; + if (SUCCEEDED(names->FindLocaleName(localeName, &index, &exists)) && exists) { + uint length; + if (SUCCEEDED(names->GetStringLength(index, &length)) && length > 0) { + QVarLengthArray<wchar_t> buffer(int(length) + 1); + if (SUCCEEDED(names->GetString(index, buffer.data(), length + 1))) + return QString::fromWCharArray(buffer.data()); + } + } + + return QString(); +} + +static QFont::Stretch fromDirectWriteStretch(DWRITE_FONT_STRETCH stretch) +{ + switch (stretch) { + case DWRITE_FONT_STRETCH_ULTRA_CONDENSED: return QFont::UltraCondensed; + case DWRITE_FONT_STRETCH_EXTRA_CONDENSED: return QFont::ExtraCondensed; + case DWRITE_FONT_STRETCH_CONDENSED: return QFont::Condensed; + case DWRITE_FONT_STRETCH_SEMI_CONDENSED: return QFont::SemiCondensed; + case DWRITE_FONT_STRETCH_NORMAL: return QFont::Unstretched; + case DWRITE_FONT_STRETCH_SEMI_EXPANDED: return QFont::SemiExpanded; + case DWRITE_FONT_STRETCH_EXPANDED: return QFont::Expanded; + case DWRITE_FONT_STRETCH_EXTRA_EXPANDED: return QFont::ExtraExpanded; + case DWRITE_FONT_STRETCH_ULTRA_EXPANDED: return QFont::UltraExpanded; + default: return QFont::AnyStretch; + } +} + +static QFont::Weight fromDirectWriteWeight(DWRITE_FONT_WEIGHT weight) +{ + return QPlatformFontDatabase::weightFromInteger(int(weight)); +} + +static DWRITE_FONT_STYLE toDirectWriteStyle(QFont::Style style) +{ + switch (style) { + case QFont::StyleNormal: return DWRITE_FONT_STYLE_NORMAL; + case QFont::StyleOblique: return DWRITE_FONT_STYLE_OBLIQUE; + case QFont::StyleItalic: return DWRITE_FONT_STYLE_ITALIC; + default: return DWRITE_FONT_STYLE_NORMAL; + } +} + +static QFont::Style fromDirectWriteStyle(DWRITE_FONT_STYLE style) +{ + switch (style) { + case DWRITE_FONT_STYLE_NORMAL: return QFont::StyleNormal; + case DWRITE_FONT_STYLE_OBLIQUE: return QFont::StyleOblique; + case DWRITE_FONT_STYLE_ITALIC: return QFont::StyleItalic; + default: return QFont::StyleNormal; + } +} + +void QWindowsDirectWriteFontDatabase::populateFamily(const QString &familyName) +{ + auto it = m_populatedFonts.find(familyName); + IDWriteFontFamily *fontFamily = it != m_populatedFonts.end() ? it.value() : nullptr; + if (fontFamily == nullptr) { + qCWarning(lcQpaFonts) << "Cannot find" << familyName << "in list of fonts"; + return; + } + + qCDebug(lcQpaFonts) << "Populate family:" << familyName; + + wchar_t defaultLocale[LOCALE_NAME_MAX_LENGTH]; + bool hasDefaultLocale = GetUserDefaultLocaleName(defaultLocale, LOCALE_NAME_MAX_LENGTH) != 0; + wchar_t englishLocale[] = L"en-us"; + + static const int SMOOTH_SCALABLE = 0xffff; + const QString foundryName; // No such concept. + const bool scalable = true; + const bool antialias = false; + const int size = SMOOTH_SCALABLE; + + IDWriteFontList *matchingFonts; + if (SUCCEEDED(fontFamily->GetMatchingFonts(DWRITE_FONT_WEIGHT_REGULAR, + DWRITE_FONT_STRETCH_NORMAL, + DWRITE_FONT_STYLE_NORMAL, + &matchingFonts))) { + for (uint j = 0; j < matchingFonts->GetFontCount(); ++j) { + IDWriteFont *font; + if (SUCCEEDED(matchingFonts->GetFont(j, &font))) { + IDWriteFont1 *font1 = nullptr; + if (!SUCCEEDED(font->QueryInterface(__uuidof(IDWriteFont1), + reinterpret_cast<void **>(&font1)))) { + qCWarning(lcQpaFonts) << "COM object does not support IDWriteFont1"; + continue; + } + + QString defaultLocaleFamilyName; + QString englishLocaleFamilyName; + + IDWriteFontFamily *fontFamily2; + if (SUCCEEDED(font1->GetFontFamily(&fontFamily2))) { + IDWriteLocalizedStrings *names; + if (SUCCEEDED(fontFamily2->GetFamilyNames(&names))) { + defaultLocaleFamilyName = hasDefaultLocale ? localeString(names, defaultLocale) : QString(); + englishLocaleFamilyName = localeString(names, englishLocale); + + names->Release(); + } + + fontFamily2->Release(); + } + + if (defaultLocaleFamilyName.isEmpty() && englishLocaleFamilyName.isEmpty()) + englishLocaleFamilyName = familyName; + + { + IDWriteLocalizedStrings *names; + if (SUCCEEDED(font1->GetFaceNames(&names))) { + QString defaultLocaleStyleName = hasDefaultLocale ? localeString(names, defaultLocale) : QString(); + QString englishLocaleStyleName = localeString(names, englishLocale); + + QFont::Stretch stretch = fromDirectWriteStretch(font1->GetStretch()); + QFont::Style style = fromDirectWriteStyle(font1->GetStyle()); + QFont::Weight weight = fromDirectWriteWeight(font1->GetWeight()); + bool fixed = font1->IsMonospacedFont(); + + qCDebug(lcQpaFonts) << "Family" << familyName << "has english variant" << englishLocaleStyleName << ", in default locale:" << defaultLocaleStyleName << stretch << style << weight << fixed; + + IDWriteFontFace *face = nullptr; + if (SUCCEEDED(font->CreateFontFace(&face))) { + QSupportedWritingSystems writingSystems; + + const void *tableData = nullptr; + UINT32 tableSize; + void *tableContext = nullptr; + BOOL exists; + HRESULT hr = face->TryGetFontTable(qbswap<quint32>(MAKE_TAG('O','S','/','2')), + &tableData, + &tableSize, + &tableContext, + &exists); + if (SUCCEEDED(hr) && exists) { + writingSystems = QPlatformFontDatabase::writingSystemsFromOS2Table(reinterpret_cast<const char *>(tableData), tableSize); + } else { // Fall back to checking first character of each Unicode range in font (may include too many writing systems) + quint32 rangeCount; + hr = font1->GetUnicodeRanges(0, nullptr, &rangeCount); + + if (rangeCount > 0) { + QVarLengthArray<DWRITE_UNICODE_RANGE, QChar::ScriptCount> ranges(rangeCount); + + hr = font1->GetUnicodeRanges(rangeCount, ranges.data(), &rangeCount); + if (SUCCEEDED(hr)) { + for (uint i = 0; i < rangeCount; ++i) { + QChar::Script script = QChar::script(ranges.at(i).first); + + QFontDatabase::WritingSystem writingSystem = qt_writing_system_for_script(script); + + if (writingSystem > QFontDatabase::Any && writingSystem < QFontDatabase::WritingSystemsCount) + writingSystems.setSupported(writingSystem); + } + } else { + const QString errorString = qt_error_string(int(hr)); + qCWarning(lcQpaFonts) << "Failed to get unicode ranges for font" << englishLocaleFamilyName << englishLocaleStyleName << ":" << errorString; + } + } + } + + if (!englishLocaleStyleName.isEmpty() || defaultLocaleStyleName.isEmpty()) { + qCDebug(lcQpaFonts) << "Font" << englishLocaleFamilyName << englishLocaleStyleName << "supports writing systems:" << writingSystems; + + QPlatformFontDatabase::registerFont(englishLocaleFamilyName, englishLocaleStyleName, QString(), weight, style, stretch, antialias, scalable, size, fixed, writingSystems, face); + face->AddRef(); + } + + if (!defaultLocaleFamilyName.isEmpty() && defaultLocaleFamilyName != englishLocaleFamilyName) { + QPlatformFontDatabase::registerFont(defaultLocaleFamilyName, defaultLocaleStyleName, QString(), weight, style, stretch, antialias, scalable, size, fixed, writingSystems, face); + face->AddRef(); + } + + face->Release(); + } + + names->Release(); + } + } + + font1->Release(); + font->Release(); + } + } + + matchingFonts->Release(); + } +} + +QFontEngine *QWindowsDirectWriteFontDatabase::fontEngine(const QFontDef &fontDef, void *handle) +{ + IDWriteFontFace *face = reinterpret_cast<IDWriteFontFace *>(handle); + Q_ASSERT(face != nullptr); + + QWindowsFontEngineDirectWrite *fontEngine = new QWindowsFontEngineDirectWrite(face, fontDef.pixelSize, data()); + fontEngine->initFontInfo(fontDef, defaultVerticalDPI()); + + return fontEngine; +} + +QStringList QWindowsDirectWriteFontDatabase::fallbacksForFamily(const QString &family, QFont::Style style, QFont::StyleHint styleHint, QChar::Script script) const +{ + QStringList result; + result.append(familyForStyleHint(styleHint)); + result.append(extraTryFontsForFamily(family)); + result.append(QPlatformFontDatabase::fallbacksForFamily(family, style, styleHint, script)); + + qCDebug(lcQpaFonts) << __FUNCTION__ << family << style << styleHint + << script << result; + return result; +} + +QStringList QWindowsDirectWriteFontDatabase::addApplicationFont(const QByteArray &fontData, const QString &fileName, QFontDatabasePrivate::ApplicationFont *applicationFont) +{ + qCDebug(lcQpaFonts) << "Adding application font" << fileName; + + QByteArray loadedData = fontData; + if (loadedData.isEmpty()) { + QFile file(fileName); + if (!file.open(QIODevice::ReadOnly)) { + qCWarning(lcQpaFonts) << "Cannot open" << fileName << "for reading."; + return QStringList(); + } + loadedData = file.readAll(); + } + + IDWriteFontFace *face = createDirectWriteFace(loadedData); + if (face == nullptr) { + qCWarning(lcQpaFonts) << "Failed to create DirectWrite face from font data. Font may be unsupported."; + return QStringList(); + } + + wchar_t defaultLocale[LOCALE_NAME_MAX_LENGTH]; + bool hasDefaultLocale = GetUserDefaultLocaleName(defaultLocale, LOCALE_NAME_MAX_LENGTH) != 0; + wchar_t englishLocale[] = L"en-us"; + + static const int SMOOTH_SCALABLE = 0xffff; + const QString foundryName; // No such concept. + const bool scalable = true; + const bool antialias = false; + const int size = SMOOTH_SCALABLE; + + QSupportedWritingSystems writingSystems; + writingSystems.setSupported(QFontDatabase::Any); + writingSystems.setSupported(QFontDatabase::Latin); + + QStringList ret; + IDWriteFontFace3 *face3 = nullptr; + if (SUCCEEDED(face->QueryInterface(__uuidof(IDWriteFontFace3), + reinterpret_cast<void **>(&face3)))) { + QString defaultLocaleFamilyName; + QString englishLocaleFamilyName; + + IDWriteLocalizedStrings *names; + if (SUCCEEDED(face3->GetFamilyNames(&names))) { + defaultLocaleFamilyName = hasDefaultLocale ? localeString(names, defaultLocale) : QString(); + englishLocaleFamilyName = localeString(names, englishLocale); + + names->Release(); + } + + QString defaultLocaleStyleName; + QString englishLocaleStyleName; + if (SUCCEEDED(face3->GetFaceNames(&names))) { + defaultLocaleStyleName = hasDefaultLocale ? localeString(names, defaultLocale) : QString(); + englishLocaleStyleName = localeString(names, englishLocale); + + names->Release(); + } + + QFont::Stretch stretch = fromDirectWriteStretch(face3->GetStretch()); + QFont::Style style = fromDirectWriteStyle(face3->GetStyle()); + QFont::Weight weight = fromDirectWriteWeight(face3->GetWeight()); + bool fixed = face3->IsMonospacedFont(); + + qCDebug(lcQpaFonts) << "\tFont names:" << englishLocaleFamilyName << ", " << defaultLocaleFamilyName + << ", style names:" << englishLocaleStyleName << ", " << defaultLocaleStyleName + << ", stretch:" << stretch + << ", style:" << style + << ", weight:" << weight + << ", fixed:" << fixed; + + if (!englishLocaleFamilyName.isEmpty()) { + if (applicationFont != nullptr) { + QFontDatabasePrivate::ApplicationFont::Properties properties; + properties.style = style; + properties.weight = weight; + properties.familyName = englishLocaleFamilyName; + properties.styleName = englishLocaleStyleName; + applicationFont->properties.append(properties); + } + + ret.append(englishLocaleFamilyName); + QPlatformFontDatabase::registerFont(englishLocaleFamilyName, englishLocaleStyleName, QString(), weight, style, stretch, antialias, scalable, size, fixed, writingSystems, face); + face->AddRef(); + } + + if (!defaultLocaleFamilyName.isEmpty() && defaultLocaleFamilyName != englishLocaleFamilyName) { + if (applicationFont != nullptr) { + QFontDatabasePrivate::ApplicationFont::Properties properties; + properties.style = style; + properties.weight = weight; + properties.familyName = englishLocaleFamilyName; + properties.styleName = englishLocaleStyleName; + applicationFont->properties.append(properties); + } + + ret.append(defaultLocaleFamilyName); + QPlatformFontDatabase::registerFont(defaultLocaleFamilyName, defaultLocaleStyleName, QString(), weight, style, stretch, antialias, scalable, size, fixed, writingSystems, face); + face->AddRef(); + } + + face3->Release(); + } else { + qCWarning(lcQpaFonts) << "Unable to query IDWriteFontFace3 interface from font face."; + } + + face->Release(); + + return ret; +} + +void QWindowsDirectWriteFontDatabase::releaseHandle(void *handle) +{ + IDWriteFontFace *face = reinterpret_cast<IDWriteFontFace *>(handle); + face->Release(); +} + +bool QWindowsDirectWriteFontDatabase::fontsAlwaysScalable() const +{ + return true; +} + +bool QWindowsDirectWriteFontDatabase::isPrivateFontFamily(const QString &family) const +{ + Q_UNUSED(family); + return false; +} + +void QWindowsDirectWriteFontDatabase::populateFontDatabase() +{ + wchar_t defaultLocale[LOCALE_NAME_MAX_LENGTH]; + bool hasDefaultLocale = GetUserDefaultLocaleName(defaultLocale, LOCALE_NAME_MAX_LENGTH) != 0; + wchar_t englishLocale[] = L"en-us"; + + QString defaultFontName = defaultFont().family(); + QString systemDefaultFontName = systemDefaultFont().family(); + + IDWriteFontCollection *fontCollection; + if (SUCCEEDED(data()->directWriteFactory->GetSystemFontCollection(&fontCollection))) { + for (uint i = 0; i < fontCollection->GetFontFamilyCount(); ++i) { + IDWriteFontFamily *fontFamily; + if (SUCCEEDED(fontCollection->GetFontFamily(i, &fontFamily))) { + QString defaultLocaleName; + QString englishLocaleName; + + IDWriteLocalizedStrings *names; + if (SUCCEEDED(fontFamily->GetFamilyNames(&names))) { + if (hasDefaultLocale) + defaultLocaleName = localeString(names, defaultLocale); + + englishLocaleName = localeString(names, englishLocale); + } + + qCDebug(lcQpaFonts) << "Registering font, english name = " << englishLocaleName << ", name in current locale = " << defaultLocaleName; + if (!defaultLocaleName.isEmpty()) { + registerFontFamily(defaultLocaleName); + m_populatedFonts.insert(defaultLocaleName, fontFamily); + fontFamily->AddRef(); + + if (defaultLocaleName == defaultFontName && defaultFontName != systemDefaultFontName) { + qDebug(lcQpaFonts) << "Adding default font" << systemDefaultFontName << "as alternative to" << defaultLocaleName; + + m_populatedFonts.insert(systemDefaultFontName, fontFamily); + fontFamily->AddRef(); + } + } + + if (!englishLocaleName.isEmpty() && englishLocaleName != defaultLocaleName) { + registerFontFamily(englishLocaleName); + m_populatedFonts.insert(englishLocaleName, fontFamily); + fontFamily->AddRef(); + + if (englishLocaleName == defaultFontName && defaultFontName != systemDefaultFontName) { + qDebug(lcQpaFonts) << "Adding default font" << systemDefaultFontName << "as alternative to" << englishLocaleName; + + m_populatedFonts.insert(systemDefaultFontName, fontFamily); + fontFamily->AddRef(); + } + } + + fontFamily->Release(); + } + } + } +} + +QFont QWindowsDirectWriteFontDatabase::defaultFont() const +{ + return QFont(QStringLiteral("Segoe UI")); +} + +#endif // QT_USE_DIRECTWRITE3 + +QT_END_NAMESPACE |