Merge pull request #100 from jshrake/add-auto-gamma-auto-level

Add MagickAutoGammaImage and MagickAutoLevelImage

src/wand/magick.rs

@@ -1016,6 +1016,12 @@ impl MagickWand {
 
         /// Applies k-means color reduction to the image.
         MagickKmeansImage => kmeans(number_colors: size_t, max_iterations: size_t, tolerance: f64)
+
+        /// Extracts the 'mean' from the image and adjust the image to try make set its gamma appropriately.
+        MagickAutoGammaImage => auto_gamma()
+
+        /// Adjusts the levels of a particular image channel by scaling the minimum and maximum values to the full quantum range.
+        MagickAutoLevelImage => auto_level()
     );
 
     get!(get_image_colors, MagickGetImageColors, size_t);

tests/lib.rs

@@ -398,6 +398,25 @@ fn test_resource_limits() {
 }
 
 #[test]
+fn test_auto_level() {
+    START.call_once(|| {
+        magick_wand_genesis();
+    });
+    let wand = MagickWand::new();
+    assert!(wand.read_image("tests/data/IMG_5745.JPG").is_ok());
+    assert!(wand.auto_level().is_ok());
+}
+
+#[test]
+fn test_auto_gamma() {
+    START.call_once(|| {
+        magick_wand_genesis();
+    });
+    let wand = MagickWand::new();
+    assert!(wand.read_image("tests/data/IMG_5745.JPG").is_ok());
+    assert!(wand.auto_gamma().is_ok());
+}
+
 fn test_import_export_pixels_roundtrip() {
     START.call_once(|| {
         magick_wand_genesis();