Eliminate a circular dependency by making BGRAToRGBA() generic (no pulling in guchar from gtk.h) and moving it from base/gfx to base.

Review URL: http://codereview.chromium.org/87016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14117 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 31 insertions, 0 deletions

diff --git a/base/linux_util.cc b/base/linux_util.cc
new file mode 100644
index 0000000..a58ee99
--- /dev/null
+++ b/base/linux_util.cc
@@ -0,0 +1,31 @@
+// 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 "linux_util.h"
+
+#include <stdlib.h>
+
+namespace base {
+
+uint8_t* BGRAToRGBA(const uint8_t* pixels, int width, int height, int stride) {
+  if (stride == 0)
+    stride = width * 4;
+
+  uint8_t* new_pixels = static_cast<uint8_t*>(malloc(height * stride));
+
+  // We have to copy the pixels and swap from BGRA to RGBA.
+  for (int i = 0; i < height; ++i) {
+    for (int j = 0; j < width; ++j) {
+      int idx = i * stride + j * 4;
+      new_pixels[idx] = pixels[idx + 2];
+      new_pixels[idx + 1] = pixels[idx + 1];
+      new_pixels[idx + 2] = pixels[idx];
+      new_pixels[idx + 3] = pixels[idx + 3];
+    }
+  }
+
+  return new_pixels;
+}
+
+}  // namespace base