v1.0.0-rc.121 (#28)

This is an UNSTABLE release.

* jfjoch_broker: Report changes in the image buffer, so viewer doesn't reload constantly
* jfjoch_viewer: Improve performance of loading images
* jfjoch_viewer: Auto-throttle image loading in HTTP-sync / movie modes
* jfjoch_viewer: Auto-foreground calculated with histogram
* jfjoch_viewer: Fix rare segmentation fault

Reviewed-on: #28
Co-authored-by: Filip Leonarski <filip.leonarski@psi.ch>
Co-committed-by: Filip Leonarski <filip.leonarski@psi.ch>

viewer/image_viewer/JFJochDiffractionImage.cpp

@@ -290,11 +290,15 @@ void JFJochDiffractionImage::DrawBeamCenter() {
 
 void JFJochDiffractionImage::DrawTopPixels() {
     int i = 0;
-    for (auto iter = image->ValidPixels().crbegin();
-         iter != image->ValidPixels().rend() && i < show_highest_pixels;
-         iter++, i++)
-        DrawCross(iter->second % image->Dataset().experiment.GetXPixelsNum() + 0.5,
-                  iter->second / image->Dataset().experiment.GetXPixelsNum() + 0.5, 15, 3);
+    for (const auto& p : image->GetTopPixels()) {
+        if (i >= show_highest_pixels)
+            break;
+
+        const int32_t idx = p.second;
+        DrawCross(idx % image->Dataset().experiment.GetXPixelsNum() + 0.5,
+                  idx / image->Dataset().experiment.GetXPixelsNum() + 0.5, 15, 3);
+        i++;
+    }
 }