[Author: altse]

Add category extension to UIImage to allow resizing while preserving aspect
 ratios and optional image clipping.

R=thomasvl,dmaclach
DELTA=507  (507 added, 0 deleted, 0 changed)

1 files changed, 40 insertions, 0 deletions

diff --git a/iPhone/GTMUIImage+Resize.h b/iPhone/GTMUIImage+Resize.h
new file mode 100644
index 0000000..25e2125
--- /dev/null
+++ b/iPhone/GTMUIImage+Resize.h
@@ -0,0 +1,40 @@
+//
+//  GTMUIImage+Resize.h
+//
+//  Copyright 2009 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface UIImage (GTMUIImageResizeAdditions)
+
+// Returns an image resized to |targetSize|.
+//
+// If |preserveAspectRatio| is YES, the original image aspect ratio is
+// preserved.
+//
+// When |preserveAspectRatio| is YES and if |targetSize|'s aspect ratio
+// is different from the image, the resulting image will be shrunken to
+// a size that is within |targetSize|.
+//
+// To preserve the |targetSize| when |preserveAspectRatio| is YES, set
+// |trimToFit| to YES. The resulting image will be the largest proportion
+// of the receiver that fits in the targetSize, aligned to center of the image.
+//
+// Image interpolation level for resizing is set to kCGInterpolationDefault.
+- (UIImage *)gtm_imageByResizingToSize:(CGSize)targetSize
+                   preserveAspectRatio:(BOOL)preserveAspectRatio
+                             trimToFit:(BOOL)trimToFit;
+@end