Add platform font database support to 'minimal' QPA plugin

This commit extends 060e0f6628fd185994911307 by loading
the platform font database if there's any. Note that this
happens at compile time and depends on QtFontDatabaseSupport.

Change-Id: Id073fd949765d9439bbb3f66187b15de444d535f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

2 files changed, 30 insertions, 9 deletions

diff --git a/src/plugins/platforms/minimal/qminimalintegration.cpp b/src/plugins/platforms/minimal/qminimalintegration.cpp
index 03c72502cb..aa0037f187 100644
--- a/src/plugins/platforms/minimal/qminimalintegration.cpp
+++ b/src/plugins/platforms/minimal/qminimalintegration.cpp
@@ -44,12 +44,19 @@
 #include <QtGui/private/qguiapplication_p.h>
 #include <qpa/qplatformwindow.h>
 
-#if defined(Q_OS_WIN)
 #include <QtFontDatabaseSupport/private/qbasicfontdatabase_p.h>
+#if defined(Q_OS_WINRT)
+#  include <QtFontDatabaseSupport/private/qwinrtfontdatabase_p.h>
+#elif defined(Q_OS_WIN)
+#  include <QtFontDatabaseSupport/private/qwindowsfontdatabase_p.h>
+#  if QT_CONFIG(freetype)
+#    include <QtFontDatabaseSupport/private/qwindowsfontdatabase_ft_p.h>
+#  endif
+#elif defined(Q_OS_DARWIN)
+#  include <QtFontDatabaseSupport/private/qcoretextfontdatabase_p.h>
 #elif QT_CONFIG(fontconfig)
-#include <QtFontDatabaseSupport/private/qgenericunixfontdatabase_p.h>
-#else
-#include <qpa/qplatformfontdatabase.h>
+#  include <QtFontDatabaseSupport/private/qgenericunixfontdatabase_p.h>
+#  include <qpa/qplatformfontdatabase.h>
 #endif
 
 #if !defined(Q_OS_WIN)
@@ -70,6 +77,8 @@ static inline unsigned parseOptions(const QStringList &paramList)
     for (const QString &param : paramList) {
         if (param == QLatin1String("enable_fonts"))
             options |= QMinimalIntegration::EnableFonts;
+        else if (param == QLatin1String("freetype"))
+            options |= QMinimalIntegration::FreeTypeFontDatabase;
     }
     return options;
 }
@@ -117,12 +126,23 @@ public:
 
 QPlatformFontDatabase *QMinimalIntegration::fontDatabase() const
 {
-    if (m_options & EnableFonts) {
+    if (!m_fontDatabase && (m_options & EnableFonts)) {
 #if QT_CONFIG(fontconfig)
-        if (!m_fontDatabase)
-            m_fontDatabase = new QGenericUnixFontDatabase;
+        m_fontDatabase = new QGenericUnixFontDatabase;
+#elif defined(Q_OS_WINRT)
+        m_fontDatabase = new QWinRTFontDatabase;
+#elif defined(Q_OS_WIN)
+        if (m_options & FreeTypeFontDatabase) {
+#  if QT_CONFIG(freetype)
+            m_fontDatabase = new QWindowsFontDatabaseFT;
+#  endif // freetype
+        } else {
+            m_fontDatabase = new QWindowsFontDatabase;
+        }
+#elif defined(Q_OS_DARWIN)
+        m_fontDatabase = new QCoreTextFontDatabase;
 #else
-        return QPlatformIntegration::fontDatabase();
+        m_fontDatabase = QPlatformIntegration::fontDatabase();
 #endif
     }
     if (!m_fontDatabase)
diff --git a/src/plugins/platforms/minimal/qminimalintegration.h b/src/plugins/platforms/minimal/qminimalintegration.h
index 755664d14d..eaa2f228c5 100644
--- a/src/plugins/platforms/minimal/qminimalintegration.h
+++ b/src/plugins/platforms/minimal/qminimalintegration.h
@@ -67,7 +67,8 @@ class QMinimalIntegration : public QPlatformIntegration
 public:
     enum Options { // Options to be passed on command line or determined from environment
         DebugBackingStore = 0x1,
-        EnableFonts = 0x2
+        EnableFonts = 0x2,
+        FreeTypeFontDatabase = 0x4
     };
 
     explicit QMinimalIntegration(const QStringList &parameters);