Minimize parameter changes on glyph cache textures

Cache the last set filtering mode on glyph textures and update only
when necessary.

Reviewed-by: Gunnar Sletta

1 files changed, 8 insertions, 0 deletions

diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
index eb3693c..e22146d 100644
--- a/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
+++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
@@ -83,6 +83,12 @@ public:
 
     inline void setPaintEnginePrivate(QGL2PaintEngineExPrivate *p) { pex = p; }
 
+    enum FilterMode {
+        Nearest,
+        Linear
+    };
+    FilterMode filterMode() const { return m_filterMode; }
+    void setFilterMode(FilterMode m) { m_filterMode = m; }
 
 public Q_SLOTS:
     void contextDestroyed(const QGLContext *context) {
@@ -117,6 +123,8 @@ private:
     int m_height;
 
     QGLShaderProgram *m_program;
+
+    FilterMode m_filterMode;
 };
 
 QT_END_NAMESPACE