gui: Create a call set for thumbnails requested.

Retracer now knows what thumbnails are needed. This information needs
to be communicated to the glretrace command.

Construct a string that contains the call numbers for all missing thumbnails.

The constructed string is then passed to glretrace with the "-S" argument.

TODO: we want to be able to detect contiguous sequences of calls and emit
them as a range. However, I wasn't able to get this working correctly and
will defer this to a future patch.

1 files changed, 25 insertions, 0 deletions

diff --git a/gui/retracer.cpp b/gui/retracer.cpp
index bc6686be..4d117afb 100644
--- a/gui/retracer.cpp
+++ b/gui/retracer.cpp
@@ -275,6 +275,27 @@ void Retracer::resetThumbnailsToCapture()
     m_thumbnailsToCapture.clear();
 }
 
+QString Retracer::thumbnailCallSet()
+{
+    QString callSet;
+
+    bool isFirst = true;
+
+    foreach (qlonglong callIndex, m_thumbnailsToCapture) {
+        // TODO: detect contiguous ranges
+        if (!isFirst) {
+            callSet.append(QLatin1String(","));
+        } else {
+            isFirst = false;
+        }
+
+        //emit "callIndex"
+        callSet.append(QString::number(callIndex));
+    }
+
+    //qDebug() << QLatin1String("debug: call set to capture: ") << callSet;
+    return callSet;
+}
 
 /**
  * Starting point for the retracing thread.
@@ -328,6 +349,10 @@ void Retracer::run()
         arguments << QLatin1String("-D");
         arguments << QString::number(m_captureCall);
     } else if (m_captureThumbnails) {
+        if (!m_thumbnailsToCapture.isEmpty()) {
+            arguments << QLatin1String("-S");
+            arguments << thumbnailCallSet();
+        }
         arguments << QLatin1String("-s"); // emit snapshots
         arguments << QLatin1String("-"); // emit to stdout
     } else if (isProfiling()) {