1 files changed, 26 insertions, 2 deletions
diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp
index 919c542..705ad09 100644
--- a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp
+++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp
@@ -54,11 +54,18 @@ extern Q_GUI_EXPORT bool qt_cleartype_enabled;
 
 QGLTextureGlyphCache::QGLTextureGlyphCache(QGLContext *context, QFontEngineGlyphCache::Type type, const QTransform &matrix)
     : QImageTextureGlyphCache(type, matrix)
-    , ctx(context)
+    , ctx(0)
     , m_width(0)
     , m_height(0)
     , m_filterMode(Nearest)
 {
+    setContext(context);
+}
+
+void QGLTextureGlyphCache::setContext(QGLContext *context)
+{
+    ctx = context;
+
     // broken FBO readback is a bug in the SGX 1.3 and 1.4 drivers for the N900 where
     // copying between FBO's is broken if the texture is either GL_ALPHA or POT. The
     // workaround is to use a system-memory copy of the glyph cache for this device.
@@ -71,7 +78,7 @@ QGLTextureGlyphCache::QGLTextureGlyphCache(QGLContext *context, QFontEngineGlyph
             SLOT(contextDestroyed(const QGLContext*)));
 }
 
-QGLTextureGlyphCache::~QGLTextureGlyphCache()
+void QGLTextureGlyphCache::clear() 
 {
     if (ctx) {
         QGLShareContextScope scope(ctx);
@@ -81,7 +88,24 @@ QGLTextureGlyphCache::~QGLTextureGlyphCache()
 
         if (m_width || m_height)
             glDeleteTextures(1, &m_texture);
+
+        m_fbo = 0;
+        m_texture = 0;
+        m_width = 0;
+        m_height = 0;
+        m_w = 0;
+        m_h = 0;
+        m_cx = 0;
+        m_cy = 0;
+        m_currentRowHeight = 0;
+        coords.clear();
     }
+  
+}
+
+QGLTextureGlyphCache::~QGLTextureGlyphCache()
+{
+    clear();
 }
 
 void QGLTextureGlyphCache::createTextureData(int width, int height)