Add a new cairo_boilerplate_mode_t so that the boilerplate targets can
do slightly different things if being tested for correctness vs. being
run for performance.
This patch adds a bunch of makefiles for building cairo with Visual C++.
gnu make is still required, and make must be run from a command prompt
that has the Visual C++ paths set up, as well as has the cygwin environment
in the path. Run 'make -f Makefile.win32'.
Previously we were setting the target tolerance based on the surface
type. But that doesn't work as multiple backends will provide a surface
of type meta. So instead we put the tolerance as a value in the
cairo_test_target data structure.
With this change, some single-pixel errors of 1 in the SVG backend
should now be ignored.
The interface of the various buffer/image_diff functions is improved to
provide the maximum pixel difference in addition to the number of pixels
that differ. This value can then be used to compare against a per-backend
tolerance.
Currently I've set the SVG backend's tolerance to 1 to handle some issues
we're currently seeing of single-bit differences on different systems, (but
we're not exactly sure why yet).
Also I improved the image_diff routines to properly report a status value
on failure rather than the bogus value of -1 for pixels_changed.
The bug shows up when doing cairo_copy_path_flat for a path that has
a curve_to immediately after a close_path. When the curve is flattened
the flattener is using (0,0) as the initial point rather than the proper
close_to point.
This test also serves to ensure a similar bug doesn't crop up when
closing a path that begins with an implicit move_to, (as from cairo_arc).
In that bug the path state may have no last-move-point and the path
is closed to (0,0). This bug is not present currently, but did appear
during the development of a fix for the bug above.
The difference here is that the SVG backend uses a meta-surface for
its similar surface, so there are no rasterization/filtering
artefacts when scaling the source surface.
that combine vertical layout with font_matrix rotation and translation.
Currently Type3 and Type1 font paths both show broken behavior.
The type1 test uses "Nimbus Sans L" as the font.
Don't hardcode Valgrind flags in tests/Makefile.am so that
tests/Makefile doesn't need to be rebuilt to use different flags. Not
everybody is looking for memory leaks.
This is useful to review every once in a while to drop duplicate images that
can be dropped. For example, if there are two identical images one named
some-test-svg-rgb24-ref.png and other some-test-svg-argb32-ref.png, those two
can be replaced with some-test-svg-ref.png.
