From 42e4a5841cc69247231640d9d5f694f11b744150 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Tue, 28 Mar 2006 10:28:49 +0000
Subject: [PATCH] From Mike Weiblen, added support for new OSG_IMAGE_FILE_NAME
 env var for setting the default name to use when writing out captured images
 from the viewer.

---
 include/osgProducer/Viewer |  5 ++++-
 src/osgProducer/Viewer.cpp | 16 ++++++++++++----
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/include/osgProducer/Viewer b/include/osgProducer/Viewer
index b06ca3f77..d2fa3d914 100644
--- a/include/osgProducer/Viewer
+++ b/include/osgProducer/Viewer
@@ -188,9 +188,12 @@ class OSGPRODUCER_EXPORT Viewer : public OsgCameraGroup, public osgGA::GUIAction
         /** Set the filename to write to when the viewer takes an image snapshot on the last frame() when done is enabled.*/
         void setWriteImageFileName(const std::string& filename);
 
-        /** Set the filename to write to when the viewer takes an image snapshot on the last frame() when done is enabled.*/
+        /** Get the filename to write to when the viewer takes an image snapshot on the last frame() when done is enabled.*/
         const std::string& getWriteImageFileName() const;
 
+        /** Get the default filename for writing an image snapshot */
+        static const char* getDefaultImageFileName();
+
 
         /** Override the Producer::CameraGroup::setViewByMatrix to catch all changes to view.*/
         virtual void setViewByMatrix( const Producer::Matrix & pm);
diff --git a/src/osgProducer/Viewer.cpp b/src/osgProducer/Viewer.cpp
index 55f8ad1a4..11aacb5e7 100644
--- a/src/osgProducer/Viewer.cpp
+++ b/src/osgProducer/Viewer.cpp
@@ -140,7 +140,7 @@ Viewer::Viewer():
     _setDoneAtFrameNumber(0),
     _done(false),
     _writeImageWhenDone(false),
-    _writeImageFileName("saved_image.jpg"),
+    _writeImageFileName(getDefaultImageFileName()),
     _recordingAnimationPath(false),
     _recordingStartTime(0.0)
 {
@@ -159,7 +159,7 @@ Viewer::Viewer(Producer::CameraConfig *cfg):
     _setDoneAtFrameNumber(0),
     _done(false),
     _writeImageWhenDone(false),
-    _writeImageFileName("saved_image.jpg"),
+    _writeImageFileName(getDefaultImageFileName()),
     _recordingAnimationPath(false),
     _recordingStartTime(0.0)
 {
@@ -179,7 +179,7 @@ Viewer::Viewer(const std::string& configFile):
     _setDoneAtFrameNumber(0),
     _done(false),
     _writeImageWhenDone(false),
-    _writeImageFileName("saved_image.jpg"),
+    _writeImageFileName(getDefaultImageFileName()),
     _recordingAnimationPath(false),
     _recordingStartTime(0.0)
 {
@@ -198,7 +198,7 @@ Viewer::Viewer(osg::ArgumentParser& arguments):
     _setDoneAtFrameNumber(0),
     _done(false),
     _writeImageWhenDone(false),
-    _writeImageFileName("saved_image.jpg"),
+    _writeImageFileName(getDefaultImageFileName()),
     _recordingAnimationPath(false),
     _recordingStartTime(0.0)
 {
@@ -297,6 +297,14 @@ const std::string& Viewer::getWriteImageFileName() const
     return _writeImageFileName;
 }
 
+static osg::ApplicationUsageProxy Viewer_e0(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE, "OSG_IMAGE_FILE_NAME <filename>", "name of snapshot image file" );
+
+const char* Viewer::getDefaultImageFileName()
+{
+    const char* name = getenv( "OSG_IMAGE_FILE_NAME" );
+    return name ? name : "saved_image.jpg";
+}
+
 
 void Viewer::setCoordinateSystemNodePath(const osg::NodePath& nodePath)
 {