Richard Grenville 2f0417cd74 Feature: #27: Detect shaped windows and disable shadow on them ...

- Optionally detect shaped windows using X Shape extension and disable
  shadow on them with --shadow-ignore-shaped.

- Some windows are bounding-shaped just to support rounded corners, like
  Chromium windows (when system titlebar is disabled in its settings).
  Add --detect-rounded-corners to treat them as non-shaped windows (thus
  enable shadow on them). The algorithm I use is not perfect and wrong
  detection results are pretty possible to appear.

- Many windows don't use X Shape extensions to add shapes but use ARGB
  background instead. These windows could only be blacklisted with
  --shadow-blacklist.

- Rename a few functions. Code clean up.

2012-10-01 10:41:51 +08:00

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