cairo_fixed_integer_round[_down] were adding an unsigned mask value
before shifting its result, causing the shift to be computed as
logical (unsigned) right shift, thus producing incorrect values for
negative inputs. Making the mask value signed fixes this issue.
Bug report by cu:
http://lists.cairographics.org/archives/cairo/2010-June/020115.html
halo uses text_path + stroke + (fill | show_text) to generate a "halo"
around the string. This is to try to replicate a bug described by Ian
Britten in the PDF backend where the rendering of the show_text looked
distorted compared to the stroke.
make distcheck complains of remanents being left under test/ after a
clean, notably the files used to check the capabilities of a similar
surface and the fallback-resolution output.
Since this takes days to run now and should not find any bugs that are
not covered by the test-suite it seems like a pointless exercise.
Especially as I am trying to make a release!
Specifying individual tests to run is more common than using a group
chosen from a keyword, so change the default matching mode and introduce
'-k' to select by keyword.
A couple of different shapes that aim to test the tessellation side of
the rasterisers more... And worryingly there does seem to be an
unexpected systematic error.
Perform an early check for error status and prevent creation of a full
object. This means that we do not pass down error objects to the
initialisation routines and so can survive without paranoia inside the
library. It also has brings consistency that like the other
constructors, no object is created in error and we can skip the
cairo_destroy() if we choose (and we don't waste one of the precious
zero-alloc context slots.
Fixes crash in test/a8-mask introduced by 1a544361e8.
If we need to pattern requires component alpha, then we must take a
copy of the image and enable component alpha for pixman.
Fixes test/text-antialias-subpixel on xlib-fallback -- i.e. we will
finally render subpixel antialiased text on ancient XServers.
Safe reduction of patterns is performed in gstate, so not only are the
extra checks in _cairo_pattern_acquire_surface redundant there are also
unsafe. Simply remove them.
Fixes test/radial-gradient-extend [xlib-fallback]
Miraculously the circular references from self-copy have disappeared and
the forced finish within _cairo_pattern_fini_snapshot() now quite
explosive. By replacing them with an ordinary _cairo_pattern_fini() the
crash from test/smask-image-mask disappear along and valgrind remains
happy.
Fixes test/smask-image-mask and similar.
Commit 8d67186cb2 caches whether the device
transform is identity on context creation. However, the api is quite lax
and allows the user to modify the device transform *after* he has
started to use the surface in a context, as apparently WebKit does.
Since this is not the only instance where we may need to invalidate
caches if the user modifies state, introduce a simple mechanism for
hooking into notifications of property changes.
Fixes test/clip-device-offset.
In order to support blend modes, we need to use a clear background
whilst rendering the PDF, which inspired the use of DEST_OVER to avoid
having to render to an intermediate surface. However, the adjunct of
using subpixel text means that we cannot simply using the alpha channel
as the sole mask and so need to render to an intermediate and paint it
over an opaque background.
This reverts commit 506b2ebe71.
We have conflicting requirements here. In order to support extended
blend modes correctly we need to use DEST_OVER, at the expense of
supporting subpixel text. More thought required.
