Added trace graphics system for painting performance profiling.

When running an application with graphics system trace everything that
gets painted to the window surface is proxied through a QPaintBuffer,
which is then both streamed to a trace file and replayed on a raster
window surface. The trace file can then be replayed with
tools/qttracereplay to measure pure painting performance.

Reviewed-by: Gunnar Sletta

1 files changed, 8 insertions, 0 deletions

diff --git a/src/gui/painting/qpaintengineex_p.h b/src/gui/painting/qpaintengineex_p.h
index a252b5e..1fc1bd1 100644
--- a/src/gui/painting/qpaintengineex_p.h
+++ b/src/gui/painting/qpaintengineex_p.h
@@ -209,6 +209,14 @@ public:
 
     virtual QPixmapFilter *createPixmapFilter(int /*type*/) const { return 0; }
 
+    // These flags are needed in the implementation of paint buffers.
+    enum Flags
+    {
+        DoNotEmulate = 0x01,        // If set, QPainter will not wrap this engine in an emulation engine.
+        IsEmulationEngine = 0x02    // If set, this object is a QEmulationEngine.
+    };
+    virtual uint flags() const {return 0;}
+
 protected:
     QPaintEngineEx(QPaintEngineExPrivate &data);
 };