Added to QML_RENDERER_TIMING logic to capture most render bottlenecks.

The typical bottlenecks during rendering are usually compiling
shader programs, uploading textures and preparing glyphs,
so add profiling data around them.

Change-Id: I9c330a0f6b769836d303a035b2c0dce832842aec
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/quick/scenegraph/qsgcontext.cpp b/src/quick/scenegraph/qsgcontext.cpp
index c9ac190e86..e7e10ec2f6 100644
--- a/src/quick/scenegraph/qsgcontext.cpp
+++ b/src/quick/scenegraph/qsgcontext.cpp
@@ -71,6 +71,12 @@ DEFINE_BOOL_CONFIG_OPTION(qmlFlashMode, QML_FLASH_MODE)
 DEFINE_BOOL_CONFIG_OPTION(qmlTranslucentMode, QML_TRANSLUCENT_MODE)
 DEFINE_BOOL_CONFIG_OPTION(qmlDisableDistanceField, QML_DISABLE_DISTANCEFIELD)
 
+
+#ifndef QSG_NO_RENDERER_TIMING
+static bool qsg_render_timing = !qgetenv("QML_RENDERER_TIMING").isEmpty();
+static QElapsedTimer qsg_renderer_timer;
+#endif
+
 /*
     Comments about this class from Gunnar:
 
@@ -463,11 +469,21 @@ QSGMaterialShader *QSGContext::prepareMaterial(QSGMaterial *material)
     if (shader)
         return shader;
 
+#ifndef QSG_NO_RENDERER_TIMING
+    if (qsg_render_timing)
+        qsg_renderer_timer.start();
+#endif
+
     shader = material->createShader();
     shader->compile();
     shader->initialize();
     d->materials[type] = shader;
 
+#ifndef QSG_NO_RENDERER_TIMING
+    if (qsg_render_timing)
+        printf("   - compiling material: %dms\n", (int) qsg_renderer_timer.elapsed());
+#endif
+
     return shader;
 }