GNOME Bugzilla – Bug 694197
clutter_matrix_progress works unexpectedly
Last modified: 2013-06-04 12:20:42 UTC
Hi. I'm a WebKit developer. So I don't believe I have deep understanding about clutter. Now a day, I'm doing some work related with css animation with clutter in WebKitGtk. You can see what I'm doing in here. https://bugs.webkit.org/show_bug.cgi?id=109848 The problem is that I can see nothing when using clutter 'transform' property transition. yeah.. the clutter matrix animation is not working properly. I'm suspecting the way of interpolating two matrices in clutter. Because it's fine when I use the webkit provided decomposing & interpolating api. http://trac.webkit.org/browser/trunk/Source/WebCore/platform/graphics/transforms/TransformationMatrix.cpp#L1375 As my investigation, clutter private api, clutter_matrix_progress seems doing same work, but I don't know what is the major difference between them.
there should not be any difference at all: the matrix decomposition code is the same outlined (and used) by the CSS3 transformation specification. what does "not working properly" means? do you have a (self-contained) test case that demonstrates that interpolating between two matrices does not produce the intended result?
Closing this bug report as no further information has been provided. Please feel free to reopen this bug if you can provide the information asked for. Thanks!