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-rw-r--r--chrome/browser/ui/cocoa/image_utils.mm37
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diff --git a/chrome/browser/ui/cocoa/image_utils.mm b/chrome/browser/ui/cocoa/image_utils.mm
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+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "chrome/browser/ui/cocoa/image_utils.h"
+
+@implementation NSImage (FlippedAdditions)
+
+- (void)drawInRect:(NSRect)dstRect
+ fromRect:(NSRect)srcRect
+ operation:(NSCompositingOperation)op
+ fraction:(CGFloat)requestedAlpha
+ neverFlipped:(BOOL)neverFlipped {
+ NSAffineTransform *transform = nil;
+
+ // Flip drawing and adjust the origin to make the image come out
+ // right.
+ if (neverFlipped && [[NSGraphicsContext currentContext] isFlipped]) {
+ transform = [NSAffineTransform transform];
+ [transform scaleXBy:1.0 yBy:-1.0];
+ [transform concat];
+
+ // The lower edge of the image is as far from the origin as the
+ // upper edge was, plus it's on the other side of the origin.
+ dstRect.origin.y -= NSMaxY(dstRect) + NSMinY(dstRect);
+ }
+
+ [self drawInRect:dstRect
+ fromRect:srcRect
+ operation:op
+ fraction:requestedAlpha];
+
+ // Flip drawing back, if needed.
+ [transform concat];
+}
+
+@end