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Added cairo_set_hairline function to represent zero-width lines which draw at the minimum device resolution.

trace-to-xml.c needs cairo-xml.h which is only available when
CAIRO_HAS_XML_SURFACE feature is built which is only available when both
zlib and png are found. CAIRO_HAS_INTERPRETER only requires zlib.

Android NDK does not contain execinfo.h so malloc-stats.c cannot be
built.

It was originally added to make bisecting easier,
but has outlived its usefuleness now.

Going forward we'll have just a single cairo-version.h
header file, the one with the real version numbers.

This is needed to fix the case where cairo is being
built as a Meson subproject, but also simplifies
things in general.

Fixes #421

rework the whole CI setup to take advantage of citemplates
for building managing the docker images.

also add a meson build job and rework the ccache config to be
shared across autotools and meson. The jobs will not share ccache
artifacts though.

https://who-t.blogspot.com/2020/03/its-templates-all-way-down.html

So that people can build with Meson when using the tarballs.

Fixes #424

.. such as config.h or other generated files such as cairo-features.h,
as those might be accidentally included by the meson build and cause
weird to debug build issues.

Fixes #423

Including sys/poll.h when poll.h is available produces a compile
warning on some systems, but only sys/poll.h is present on others
such as AIX. This makes sure the most suitable poll.h is included
in each situation.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

'make check' currently fails with the following in src/test-suite.log
(how can one tell automake not to hide the error message in a file?!?):

FAIL: check-doc-syntax.sh
=========================

Checking documentation for incorrect syntax
./cairo-cogl-surface.c: * cairo_cogl_pipeline_ts. On failure, both pointers will be set to
./cairo-cogl-surface.c:/* Mostly taken from cairo_vg_surface.c */
Error: some function names in the docs are not followed by parentheses.
Fix this by searching for the following regexp in the above files:
	'^[^:]*:[/ ][*]\(\|[ 	].*\)\([^#']\|^\)\<\(cairo_[][<>/0-9a-z_]*\>[^][<>(]\)'
FAIL check-doc-syntax.sh (exit status: 1)

This commit silences that. The fix is likely not correct, but since
these are normal comments and not actual doc comments, it does not
matter much.
Signed-off-by: Uli Schlachter <psychon@znc.in>

This commit makes the test suite pass by simply ignoring failures. Not
pretty, but better than teaching people to just ignore CI failures. At
least some kinds of problems can still be caught.

Originally, I wanted to only run a single test, but while investigating
how to do this, I stumbled upon this undocumented environment variable.
This seems less ugly and might allow looking at older build logs to
figure out when something first broke.
Signed-off-by: Uli Schlachter <psychon@znc.in>

This ensures that build configuration for the cogl backend will fail
if an insufficiently new version of cogl is present, making it easier
to find the root cause of a build failure.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

rsvg_handle_close is no longer required after creating a handle with
rsvg_handle_new_from_file. It causes a deprecation warning during
compilation as well. This change removes it.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This constitutes few fixes that are necessary to compile correctly
and reduce errors when using musl libc.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Add the missing file which is necessary when symbol lookup is enabled.

This removes code that uses the cogl-path library, which was not
used except when manually modifying a preprocessor flag. It could
not use path caching, was slightly broken, and all of its
functionality was provided better by different code paths.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This redesigns the path cache so that it does not mess with the
context functions, thereby hopefully making it much more resilient
to changes in the rest of cairo that change the way the default
context works. It is also much simpler, and it is anticipated that
it will be more maintainable. Performance in contrast to the old
cache design speeds up most traces in cairo-perf-trace, and slows
down only a lesser few by <20%.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This adds very basic path-based font support to the cogl backend,
improving cairo-perf-trace performance by 6x or more on many traces.
This still is not the most desirable form of font support, which
would resemble the texture-based glyph caching in the gl backend or
use cogl-pango to automatically cache glyphs.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This makes it so that RGB24 surfaces are represented in such a way
that does not require expensive format conversions during pixel
packing and unpacking.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This mirrors a linear gradient by dobling its size and reflecting it
in the case that hardware does not support mirrored repeating.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This makes sure the journal is flushed after it reaches a certain
size, so that very large amounts of memory are not consumed if an
explicit flush is not triggered.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This ensures that if the source surface does not have an alpha
component (such as those with format RGB24), it is not blended
as if it does.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Prior to this change, cogl often queried GLX so that it returned
a framebuffer that could not support an alpha component.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

In order to be more consistent with backends such as gl, support for
creating a surface from content, width, and height parameters was
moved into the backend itself. The option to pass cairo-cogl a
framebuffer to create a texture from still exists, just now it is
not the only option.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This makes it so that operators requiring transparent values to be
used outside of the bounds of the source and/or mask textures will
trigger a second rendering of transparent pixels.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This adds correct support for negative stride images by uploading
them to a texture in their upside-down orientation and then
vertically inverting the matrix with which they are read, which
is required because OpenGL (and therefore cogl) cannot pack pixels
with a negative stride.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Prior to this change, API functions like path_exents returned
incorrect results if the cogl-specific representation of rectangular
paths was being used.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Prior to this, the rectangular filling fast path passed arguments to
_cairo_cogl_journal_log_rectangle as if they represented the
coordinates of two opposite points on the rectangle, when the arguments
actually represent a rectangle with the x and y coordinates of one
point and the width and height of the rectangle.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This adds supporte for raster sources using the same method that
is used to support radial gradient and mesh sources.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Prior to this change, the boilerplate code crashed when given surface
dimensions less than 1. This fixes such behaviour by rounding the
dimensions up to 1, which is also done by the boilerplate code for
several other backends.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Many of the tests in the test suite do many replays of different
small parts of a single surface. When combined with the cogl backend's
journaling mechanism, this consumes very large amounts of memory, as
the entire surface is allocated for each replay. This changes this
behaviour so that only the portion of the surface that will be used
is allocated.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Due to recent changes, all unbounded Porter-Duff compositing operators
can be properly supported in addition to IN.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Prior to this change, the context functions were using the accelerated
rectangle-filling path even if there was a preexisting rectangular path,
producing incorrect results.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

This changes the interpretation of multiple boxes in the clip from
using the intersection of the multiple boxes to using the union of
the multiple boxes, which corrects many results in the test suite.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>

Prior to this change, CAIRO_EXTEND_NONE was handled the same way as
CAIRO_EXTEND_PAD, which produced incorrect results in many tests.
This fixes such behaviour by created a per-source and per-mask clip
that is applied so that areas outside the bounds of the source or
mask textures are not sampled during drawing.
Signed-off-by: George Matsumura <gmmatsumura01@bvsd.org>