fix problem with compatibility code

3 files changed, 19 insertions, 21 deletions

diff --git a/src/GipfelWidget.cxx b/src/GipfelWidget.cxx
index 2efd231..a1982d5 100644
--- a/src/GipfelWidget.cxx
+++ b/src/GipfelWidget.cxx
@@ -104,23 +104,17 @@ GipfelWidget::load_image(char *file) {
   mb->box(FL_NO_BOX);
   mb->add("Center Peak", 0, (Fl_Callback*) center_cb, this);
 
-  // try to retrieve gipfel data from JPEG comment section
+  // try to retrieve gipfel data from JPEG meta data
   md = new ImageMetaData();
-  ret = md->load_image(file);
-  if (ret != 1) {
-    set_view_long(md->get_longitude());
-    set_view_lat(md->get_latitude());
-    set_view_height(md->get_height());
-    set_center_angle(md->get_direction());
-    set_nick_angle(md->get_nick());
-    set_tilt_angle(md->get_tilt());
-	set_projection((Projection::Projection_t) md->get_projection_type());
-    if (ret == 2) { // special compatibility return code for old format
-      set_scale(md->get_focallength_sensor_ratio());
-    } else {
-      set_scale(md->get_focallength_sensor_ratio() * img->w());
-    }
-  }
+  md->load_image(file, img->w());
+  set_view_long(md->get_longitude());
+  set_view_lat(md->get_latitude());
+  set_view_height(md->get_height());
+  set_center_angle(md->get_direction());
+  set_nick_angle(md->get_nick());
+  set_tilt_angle(md->get_tilt());
+  set_projection((Projection::Projection_t) md->get_projection_type());
+  set_scale(md->get_focallength_sensor_ratio() * img->w());
 
   delete md;
 
diff --git a/src/ImageMetaData.H b/src/ImageMetaData.H
index 442aaef..7116d98 100644
--- a/src/ImageMetaData.H
+++ b/src/ImageMetaData.H
@@ -29,6 +29,7 @@ class ImageMetaData {
 		double nick;
 		double tilt;
 		double focallength_sensor_ratio;
+		double scale;
 		int    projection_type;
 
 		int load_image_jpgcom(char *name);
@@ -38,7 +39,7 @@ class ImageMetaData {
 	public:
 		ImageMetaData();
 
-		int load_image(char *name);
+		int load_image(char *name, int img_width);
 		int save_image(char *in_img, char *out_img);
 
  		double get_longitude();
diff --git a/src/ImageMetaData.cxx b/src/ImageMetaData.cxx
index 424a792..d78493d 100644
--- a/src/ImageMetaData.cxx
+++ b/src/ImageMetaData.cxx
@@ -38,16 +38,19 @@ ImageMetaData::ImageMetaData() {
 	nick = 0.0;
 	tilt = 0.0;
 	focallength_sensor_ratio = 1.0;
-	projection_type = 1;
+	scale = NAN;
+	projection_type = 0;
 }
 
 
 int
-ImageMetaData::load_image(char *name) {
+ImageMetaData::load_image(char *name, int img_width) {
 	int ret;
 
 	ret = load_image_jpgcom(name);
-	if (ret != 0) {
+	if (ret == 2) { // old format
+		focallength_sensor_ratio = scale / (double) img_width;
+	} else if (ret == 1) { // get reasonable defaults from exif data
 		ret = load_image_exif(name);
 	}
 
@@ -179,7 +182,7 @@ ImageMetaData::load_image_jpgcom(char *name) {
                 direction = dir;
                 nick      = ni;
                 tilt      = ti;
-                focallength_sensor_ratio = fr;
+                scale     = fr;
                 projection_type = pt;
 
                 ret = 2; // special return value for compatibility with