Qt5 initialize GlyphCache for PSP graphics

For whatever reason Calc uses a printer graphics context to
layout cell context. Without the initialized printer fonts,
you'll see broken cell content in Calc, until you edit them.

So now some part of the Qt5 GUI is painted by Cairo via the
psp::Printer graphics context.

Change-Id: Ib67c44abc952bc244f2c803d1dba8987ab618470
Reviewed-on: https://gerrit.libreoffice.org/66817
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

vcl/inc/qt5/Qt5Data.hxx

@@ -26,7 +26,6 @@
 #include <memory>
 #include <vclpluginapi.h>
 
-class GlyphCache;
 class QCursor;
 
 class VCLPLUG_QT5_PUBLIC Qt5Data : public GenericUnixSalData

vcl/qt5/Qt5Graphics_Text.cxx

@@ -26,6 +26,8 @@
 #include <vcl/fontcharmap.hxx>
 #include <unx/geninst.h>
 #include <unx/fontmanager.hxx>
+#include <unx/glyphcache.hxx>
+#include <unx/genpspgraphics.h>
 
 #include <sallayout.hxx>
 #include <PhysicalFontCollection.hxx>
@@ -96,19 +98,32 @@ void Qt5Graphics::GetDevFontList(PhysicalFontCollection* pPFC)
         return;
 
     QFontDatabase aFDB;
-
+    QStringList aFontFamilyList;
     if (bUseFontconfig)
+        aFontFamilyList = aFDB.families();
+    GlyphCache& rGC = GlyphCache::GetInstance();
+    psp::PrintFontManager& rMgr = psp::PrintFontManager::get();
+    ::std::vector<psp::fontID> aList;
+    psp::FastPrintFontInfo aInfo;
+
+    rMgr.getFontList(aList);
+    for (auto const& elem : aList)
     {
-        const QStringList aFontFamilyList = aFDB.families();
-        ::std::vector<psp::fontID> aList;
-        psp::FastPrintFontInfo aInfo;
+        if (!rMgr.getFontFastInfo(elem, aInfo))
+            continue;
+
+        // normalize face number to the GlyphCache
+        int nFaceNum = rMgr.getFontFaceNumber(aInfo.m_nID);
+
+        // inform GlyphCache about this font provided by the PsPrint subsystem
+        FontAttributes aDFA = GenPspGraphics::Info2FontAttributes(aInfo);
+        aDFA.IncreaseQualityBy(4096);
+        const OString& rFileName = rMgr.getFontFileSysPath(aInfo.m_nID);
+        rGC.AddFontFile(rFileName, nFaceNum, aInfo.m_nID, aDFA);
 
-        psp::PrintFontManager& rMgr = psp::PrintFontManager::get();
-        rMgr.getFontList(aList);
-        for (auto const& elem : aList)
+        // register font files unknown to Qt
+        if (bUseFontconfig)
         {
-            if (!rMgr.getFontFastInfo(elem, aInfo))
-                continue;
             QString aFilename = toQString(
                 OStringToOUString(rMgr.getFontFileSysPath(aInfo.m_nID), RTL_TEXTENCODING_UTF8));
             QRawFont aRawFont(aFilename, 0.0);
@@ -117,9 +132,10 @@ void Qt5Graphics::GetDevFontList(PhysicalFontCollection* pPFC)
                 || !aFDB.styles(aFamilyName).contains(aRawFont.styleName()))
                 QFontDatabase::addApplicationFont(aFilename);
         }
+    }
 
+    if (bUseFontconfig)
         SalGenericInstance::RegisterFontSubstitutors(pPFC);
-    }
 
     for (auto& family : aFDB.families())
         for (auto& style : aFDB.styles(family))