[shotwell] transformer: Implement auto-enhance

[Jens Georg <jensgeorg src gnome org>]

commit ca90c9242b7702f50c81a0f4dfd67ef90fe772c6
Author: Jens Georg <mail jensge org>
Date:   Fri Mar 24 20:24:22 2017 +0100

    transformer: Implement auto-enhance
    
    Signed-off-by: Jens Georg <mail jensge org>

 src/graphics-processor.vala |   21 ++++++++++++++-------
 1 files changed, 14 insertions(+), 7 deletions(-)
---
diff --git a/src/graphics-processor.vala b/src/graphics-processor.vala
index c9e11d5..cb2d9d7 100644
--- a/src/graphics-processor.vala
+++ b/src/graphics-processor.vala
@@ -72,15 +72,22 @@ int main(string[] args) {
     }
 
     var output = src.copy();
+    PixelTransformationBundle? adjustments = null;
 
-    var transformations = marshall_all_transformations(pipeline);
+    if (pipeline != null) {
+        var transformations = marshall_all_transformations(pipeline);
 
-    var adjustments = new PixelTransformationBundle();
-    var map = transformations.get("adjustments");
-    if (map == null) {
-        adjustments.set_to_identity();
-    } else {
-        adjustments.load(map);
+        adjustments = new PixelTransformationBundle();
+        var map = transformations.get("adjustments");
+        if (map == null) {
+            adjustments.set_to_identity();
+        } else {
+            adjustments.load(map);
+        }
+    }
+
+    if (auto_enhance) {
+        adjustments = AutoEnhance.create_auto_enhance_adjustments(src);
     }
 
     var transformer = adjustments.generate_transformer();