Make QtQuick2 compile on QPA

Moved the logic to set pixel size into the font engines to avoid
making the platform plugin interface too complex, and added a function
in QPA to make an isolated font engine based on font data. Currently
none of the QPA back-ends supports it, but it compiles and spits out
a warning if you try to create a QRawFont from data there. This isn't
used in QtQuick2 anyway.

Reviewed-by: Jiang Jiang

1 files changed, 12 insertions, 1 deletions

diff --git a/src/gui/text/qrawfont.cpp b/src/gui/text/qrawfont.cpp
index 4a715c27cc..6ac2677c02 100644
--- a/src/gui/text/qrawfont.cpp
+++ b/src/gui/text/qrawfont.cpp
@@ -579,8 +579,19 @@ QRawFont QRawFont::fromFont(const QFont &font, QFontDatabase::WritingSystem writ
 */
 void QRawFont::setPixelSize(int pixelSize)
 {
+    if (d->fontEngine == 0)
+        return;
+
     detach();
-    d->platformSetPixelSize(pixelSize);
+    QFontEngine *oldFontEngine = d->fontEngine;
+
+    d->fontEngine = d->fontEngine->cloneWithSize(pixelSize);
+    if (d->fontEngine != 0)
+        d->fontEngine->ref.ref();
+
+    oldFontEngine->ref.deref();
+    if (oldFontEngine->cache_count == 0 && oldFontEngine->ref == 0)
+        delete oldFontEngine;
 }
 
 /*!