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, 5 deletions

diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index ed400df..a6bea76 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -162,6 +162,9 @@ static bool qt_painter_thread_test(int devType, const char *what, bool extraCond
 void QPainterPrivate::checkEmulation()
 {
     Q_ASSERT(extended);
+    if (extended->flags() & QPaintEngineEx::DoNotEmulate)
+        return;
+
     bool doEmulation = false;
     if (state->bgMode == Qt::OpaqueMode)
         doEmulation = true;
@@ -1835,11 +1838,6 @@ bool QPainter::end()
         return true;
     }
 
-    if (d->states.size() > 1) {
-        qWarning("QPainter::end: Painter ended with %d saved states",
-                 d->states.size());
-    }
-
     bool ended = true;
 
     if (d->engine->isActive()) {
@@ -1853,6 +1851,11 @@ bool QPainter::end()
         }
     }
 
+    if (d->states.size() > 1) {
+        qWarning("QPainter::end: Painter ended with %d saved states",
+                 d->states.size());
+    }
+
     if (d->engine->autoDestruct()) {
         delete d->engine;
     }