Update SGCT to enable taking screenshots of individual windows

apps/OpenSpace/main.cpp

@@ -865,11 +865,11 @@ void setSgctDelegateFunctions() {
             currentWindow->viewports().front()->nonLinearProjection()
         ) != nullptr;
     };
-    sgctDelegate.takeScreenshot = [](bool applyWarping) {
+    sgctDelegate.takeScreenshot = [](bool applyWarping, std::vector<int> windowIds) {
         ZoneScoped
 
         Settings::instance().setCaptureFromBackBuffer(applyWarping);
-        Engine::instance().takeScreenshot();
+        Engine::instance().takeScreenshot(std::move(windowIds));
         return Engine::instance().screenShotNumber();
     };
     sgctDelegate.swapBuffer = []() {

include/openspace/engine/windowdelegate.h

@@ -76,7 +76,8 @@ struct WindowDelegate {
 
     bool (*isFisheyeRendering)() = []() { return false; };
 
-    unsigned int (*takeScreenshot)(bool applyWarping) = [](bool) { return 0u; };
+    unsigned int (*takeScreenshot)(bool applyWarping, std::vector<int> windowIds) =
+        [](bool, std::vector<int>) { return 0u; };
 
     void (*swapBuffer)() = []() {};
 

include/openspace/rendering/renderengine.h

@@ -28,6 +28,7 @@
 #include <openspace/properties/propertyowner.h>
 
 #include <openspace/properties/optionproperty.h>
+#include <openspace/properties/list/intlistproperty.h>
 #include <openspace/properties/scalar/boolproperty.h>
 #include <openspace/properties/scalar/intproperty.h>
 #include <openspace/properties/scalar/floatproperty.h>
@@ -177,6 +178,7 @@ private:
     properties::BoolProperty _showVersionInfo;
     properties::BoolProperty _showCameraInfo;
 
+    properties::IntListProperty _screenshotWindowIds;
     properties::BoolProperty _applyWarping;
     properties::BoolProperty _screenshotUseDate;
     properties::BoolProperty _showFrameInformation;

src/rendering/renderengine.cpp

@@ -130,6 +130,14 @@ namespace {
         "shown on the screen"
     };
 
+    constexpr openspace::properties::Property::PropertyInfo ScreenshotWindowIdsInfo = {
+        "ScreenshotWindowId",
+        "Screenshow Window Ids",
+        "The list of window identifiers whose screenshot will be taken the next time "
+        "anyone triggers a screenshot. If this list is empty (the default), all windows "
+        "will have their screenshot taken. Id's that do not exist are silently ignored."
+    };
+
     constexpr openspace::properties::Property::PropertyInfo ApplyWarpingInfo = {
         "ApplyWarpingScreenshot",
         "Apply Warping to Screenshots",
@@ -277,6 +285,7 @@ RenderEngine::RenderEngine()
     , _verticalLogOffset(VerticalLogOffsetInfo, 0.f, 0.f, 1.f)
     , _showVersionInfo(ShowVersionInfo, true)
     , _showCameraInfo(ShowCameraInfo, true)
+    , _screenshotWindowIds(ScreenshotWindowIdsInfo)
     , _applyWarping(ApplyWarpingInfo, false)
     , _screenshotUseDate(ScreenshotUseDateInfo, false)
     , _showFrameInformation(ShowFrameNumberInfo, false)
@@ -342,6 +351,7 @@ RenderEngine::RenderEngine()
     addProperty(_value);
 
     addProperty(_globalBlackOutFactor);
+    addProperty(_screenshotWindowIds);
     addProperty(_applyWarping);
 
     _screenshotUseDate.onChange([this]() {
@@ -1046,7 +1056,10 @@ void RenderEngine::takeScreenshot() {
         std::filesystem::create_directories(absPath("${SCREENSHOTS}"));
     }
 
-    _latestScreenshotNumber = global::windowDelegate->takeScreenshot(_applyWarping);
+    _latestScreenshotNumber = global::windowDelegate->takeScreenshot(
+        _applyWarping,
+        _screenshotWindowIds
+    );
 }
 
 unsigned int RenderEngine::latestScreenshotNumber() const {