Add ANGLE as a 3rdparty library to Qt.

ANGLE is a component that implements the OpenGL ES 2.0 API on
top of DirectX 9. See the following for more info:

http://code.google.com/p/angleproject/

ANGLE is now the default configuration on Windows. If you
want to use desktop OpenGL, you should build Qt with the
following configure options:

    -opengl desktop

To configure Qt to use another OpenGL ES 2 implementation,
you should use:

    -opengl es2 -no-angle

Task-number: QTBUG-24207

Change-Id: Iefcbeaa37ed920f431729749ab8333b248fe5134
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/angle/README.qt b/src/angle/README.qt
new file mode 100644
index 0000000000..61023efcd1
--- /dev/null
+++ b/src/angle/README.qt
@@ -0,0 +1,29 @@
+This is the ANGLE project from:
+
+http://code.google.com/p/angleproject/
+
+The upstream version used here can be found in:
+
+src/common/version.h
+
+This copy of the library has been modified with several patches
+that can be found in the 'patches' subdirectory.
+
+Updating ANGLE
+-------------------------------------------------------------
+To update to a newer version of ANGLE, extract the archive
+directly into the 'src/3rdparty/angle' directory. ANGLE contains
+a .gitignore file that will overwrite the one in Qt, but this is
+not desirable so the ANGLE one should be discarded and the one in
+Qt should be kept. If there are new source/header files in ANGLE
+(git status -u) then they should be added to the relevant .pro
+file before committing.
+
+
+Using a custom ANGLE
+-------------------------------------------------------------
+Qt supports building a version of ANGLE other than the one that
+is contained in the source tree. To get Qt to build a different
+copy of ANGLE, you can set the ANGLE_DIR environment variable
+to point to the location of the custom ANGLE before building Qt.
+