Add support for rawFonts loaded from data in FaceId

The problem was that with an empty filename and index of 0, all raw fonts
loaded from data had the same FaceId, and we wouldn't bother to load
another one after doing this once.
This commit introduces a uuid in FaceId to help distinguish them in
that case.

Change-Id: I93655ff07a7d8856af1f854024e207c519f8ed1a
Reviewed-on: http://codereview.qt.nokia.com/1882
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jiang Jiang <jiang.jiang@nokia.com>

2 files changed, 4 insertions, 1 deletions

diff --git a/src/gui/text/qfontengine_p.h b/src/gui/text/qfontengine_p.h
index a70aec1..8d81acb 100644
--- a/src/gui/text/qfontengine_p.h
+++ b/src/gui/text/qfontengine_p.h
@@ -155,6 +155,7 @@ public:
     struct FaceId {
         FaceId() : index(0), encoding(0) {}
         QByteArray filename;
+        QByteArray uuid;
         int index;
         int encoding;
     };
@@ -295,7 +296,7 @@ inline bool operator ==(const QFontEngine::FaceId &f1, const QFontEngine::FaceId
 
 inline uint qHash(const QFontEngine::FaceId &f)
 {
-    return qHash((f.index << 16) + f.encoding) + qHash(f.filename);
+    return qHash((f.index << 16) + f.encoding) + qHash(f.filename + f.uuid);
 }
 
 
diff --git a/src/gui/text/qrawfont_ft.cpp b/src/gui/text/qrawfont_ft.cpp
index 5bba221..1666df3 100644
--- a/src/gui/text/qrawfont_ft.cpp
+++ b/src/gui/text/qrawfont_ft.cpp
@@ -45,6 +45,7 @@
 
 #include "qrawfont_p.h"
 #include "qfontengine_ft_p.h"
+#include "quuid.h"
 
 #if defined(Q_WS_X11) && !defined(QT_NO_FONTCONFIG)
 #  include "qfontengine_x11_p.h"
@@ -87,6 +88,7 @@ public:
         FaceId faceId;
         faceId.filename = "";
         faceId.index = 0;
+        faceId.uuid = QUuid::createUuid().toByteArray();
 
         return init(faceId, true, Format_None, fontData);
     }