Qt5 fix font drawing

The main problem was the memory management of the harfbuzz memory
blob. Now we copy the font data tables into the blob, as the
QByteArray memory will be freed at the end of the function.

Change-Id: If5a5a4b1a235e66ba472b28a156e16be1b82bf2e

vcl/qt5/Qt5Font.cxx

@@ -41,7 +41,8 @@ static hb_blob_t* getFontTable(hb_face_t*, hb_tag_t nTableTag, void* pUserData)
 
     hb_blob_t* pBlob = nullptr;
     if (nLength > 0)
-        pBlob = hb_blob_create(aTable.data(), nLength, HB_MEMORY_MODE_DUPLICATE, nullptr, nullptr);
+        pBlob = hb_blob_create(aTable.data(), nLength,
+                               HB_MEMORY_MODE_DUPLICATE, nullptr, nullptr);
     return pBlob;
 }
 

vcl/qt5/Qt5FontFace.cxx

@@ -28,6 +28,7 @@
 #include <PhysicalFontCollection.hxx>
 
 #include <QtGui/QFont>
+#include <QtGui/QFontInfo>
 #include <QtGui/QRawFont>
 
 using namespace vcl;

vcl/qt5/Qt5Graphics_Text.cxx

@@ -131,7 +131,20 @@ void Qt5Graphics::GetGlyphWidths(const PhysicalFontFace* /*pPFF*/, bool /*bVerti
 {
 }
 
-bool Qt5Graphics::GetGlyphBoundRect(const GlyphItem&, tools::Rectangle&) { return false; }
+bool Qt5Graphics::GetGlyphBoundRect(const GlyphItem& rGlyph, tools::Rectangle& rRect)
+{
+    const int nLevel = rGlyph.mnFallbackLevel;
+    if( nLevel >= MAX_FALLBACK )
+        return false;
+
+    Qt5Font* pFont = m_pTextStyle[ nLevel ];
+    if( !pFont )
+        return false;
+
+    QRawFont aRawFont(QRawFont::fromFont( *pFont ));
+    rRect = toRectangle(aRawFont.boundingRect(rGlyph.maGlyphId).toAlignedRect());
+    return true;
+}
 
 bool Qt5Graphics::GetGlyphOutline(const GlyphItem&, basegfx::B2DPolyPolygon&) { return false; }
 

vcl/qt5/Qt5Tools.hxx

@@ -46,6 +46,11 @@ inline QRect toQRect(const tools::Rectangle& rRect)
     return QRect(rRect.Left(), rRect.Top(), rRect.GetWidth(), rRect.GetHeight());
 }
 
+inline tools::Rectangle toRectangle(const QRect& rRect)
+{
+    return tools::Rectangle(rRect.left(), rRect.top(), rRect.width(), rRect.height());
+}
+
 inline QSize toQSize(const Size& rSize) { return QSize(rSize.Width(), rSize.Height()); }
 
 inline Size toSize(const QSize& rSize) { return Size(rSize.width(), rSize.height()); }