Theme image support for the Mac.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/140007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18925 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 50 insertions, 0 deletions

diff --git a/chrome/browser/browser_theme_provider_mac.mm b/chrome/browser/browser_theme_provider_mac.mm
new file mode 100644
index 0000000..a1709f9
--- /dev/null
+++ b/chrome/browser/browser_theme_provider_mac.mm
@@ -0,0 +1,50 @@
+// Copyright (c) 2009 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.
+
+#include "chrome/browser/browser_theme_provider.h"
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/logging.h"
+
+NSImage* BrowserThemeProvider::GetNSImageNamed(int id) {
+  DCHECK(CalledOnValidThread());
+
+  // Check to see if we already have the image in the cache.
+  NSImageMap::const_iterator found = nsimage_cache_.find(id);
+  if (found != nsimage_cache_.end())
+    return found->second;
+
+  // Why do we load the file directly into the image rather than doing the whole
+  // SkBitmap > native conversion that others do? Going direct means:
+  // - we use the color profiles and other embedded info in the image file
+  // - we don't fall back to the default resources which we don't use on the Mac
+  std::vector<unsigned char> raw_data;
+  if (ReadThemeFileData(id, &raw_data)) {
+    NSData* ns_data = [NSData dataWithBytes:&raw_data.front()
+                                     length:raw_data.size()];
+    if (ns_data) {
+      NSImage* nsimage = [[NSImage alloc] initWithData:ns_data];
+
+      // We loaded successfully.  Cache the image.
+      if (nsimage) {
+        nsimage_cache_[id] = nsimage;
+        return nsimage;
+      }
+    }
+  }
+
+  return nil;
+}
+
+void BrowserThemeProvider::FreePlatformImages() {
+  DCHECK(CalledOnValidThread());
+
+  // Free images.
+  for (NSImageMap::iterator i = nsimage_cache_.begin();
+       i != nsimage_cache_.end(); i++) {
+    [i->second release];
+  }
+  nsimage_cache_.clear();
+}