Just a couple of other remarks on these two (parts I, II) proposals:
Like the proposed gradient obj api function that sets an (affine)
"fill_transform",
there would be a similar one to set such on an image object:
void evas_object_image_fill_transform_set(obj, Evas_Transform *t);
Note that this is NOT the same as transforming the object itself.. that's
a
separate thing (as would be raster-based filters one could apply on general
objects).
Such 'fill_transforms' should be used mostly for the purposes of using the
image object as a texture - not for transforming "an image". The best way to do
that
would be via an object transform (which can then be a general projective one)
and by
having an image api func that would set the image obj's 'fill-policy' to none
(or
something like that), meaning that all image 'fill' attributes are ignored and
the
image is then always scaled to the size of the obj - ie. the image obj then
acts like
"an image" rather than like a plain rect which is being fill-textured with an
image.
But all this will take a bit longer to be implemented due to the fair
amount
of re-structuring of evas image internals needed to add support for it. If
anyone
is willing to try and work on that part in the meantime, let me know.
One other api func that will be needed with general stroking (and also
later when objects might support transforms or filters) is an api func to
obtain an object's 'bounds' - ie. the actual bounding rectangle of the obj
as drawn on the canvas.
void evas_object_bounding_rect_get(obj, Evas_Coord *x, *y, *w, *h);
This will be needed internally as well for correct 'hit detection' of such
modified objects (eg. of thick stroked lines, polys,... transformed objs, etc).
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