For the asynchronous loading we need a function call that parses
a file, given its path, and retrieves the image width and height.
This commit adds cogl_bitmap_get_size_from_file() to the CoglBitmap
API.
Bug 1082 - Texture bitmap is destroyed in wrong way
* clutter/cogl/common/cogl-bitmap-pixbuf.c:
(_cogl_bitmap_from_file): Make a copy of the pixbuf data in
the internal image loader so that we can keep working under
the assumption that we are using the GLib memory allocation
and deallocation functions.
Bug #930 - add support for quartz imagebackend
* clutter/cogl/common/cogl-bitmap-pixbuf.c
(_cogl_bitmap_from_file): When USE_QUARTZ is defined implement
using Core Graphics.
* configure.ac: support --with-imagebackend=quartz and print
which imagebackend is selected. Make quartz default on OSX
