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docs: Document the DeformEffect wrap-mode change

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The change from CoglVertexBuffer to CoglPrimitive led to a change of the
default wrap-mode for the pipeline. Since using REPEAT can introduce
artifacts when sampling outside the [ 0, 1 ] texture coordinates range,
and since the default wrap mode was not documented anyway, we want to
keep the change from REPEAT to CLAMP, but it's worth adding an entry in
the release notes.
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Emmanuele Bassi 2011-11-16 16:42:41 +00:00
parent ef02de19e8
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@ -289,6 +289,16 @@ features).
Release Notes for Clutter 1.10
-------------------------------------------------------------------------------
• ClutterDeformEffect switched from using CoglVertexBuffer to using the
CoglPrimitive API internally, to improve performance and use non-deprecated
Cogl API. CoglPrimitive converts COGL_WRAP_MODE_AUTOMATIC to
COGL_WRAP_MODE_CLAMP_TO_EDGE, unlike CoglVertexBuffer which converts it to
COGL_WRAP_MODE_REPEAT. This prevents artifacts when sampling texture
coordinates outside the [ 0, 1 ] range. This change may cause the back
texture to not be painted if its coordinates go outside the allowed range,
for instance when using a custom transformation matrix on the back material
used by the ClutterDeformEffect.
• The "default stage" has been deprecated; since the 1.0 release, the default
stage creation was deferred to the call to clutter_stage_get_default(), and
the preferred way for getting a ClutterStage was calling clutter_stage_new()