When declaring a dependency on a feature, say `dependency('cairo-png')`
the resulting object did not depend on cairo and thus was missing
basic things like, `cairo.h` from its include dir.
Make it so overrides do in fact include the basic cairo functionality
needed for them to work.
Related:
https://gitlab.freedesktop.org/gstreamer/gst-devtools/-/merge_requests/236
Fixes errors such as
Traceback (most recent call last):
File "C:\Users\...\cairo\test\make-cairo-test-constructors.py", line 19, in <module>
for l in f.readlines():
File "c:\python39\lib\encodings\cp1253.py", line 23, in decode
return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x98 in position 6694: character maps to <undefined>
on non-English-language Windows locales/installations.
Doesn't build any more, is very much non-essential, and hasn't
been touched in any meaningful way since it was added 13 years
ago, so just remove it for now until someone steps up. Chances
are the glibc version has improved since then.
And update configure/meson checks to check for the new function.
Drop libiberty.h check since it's only needed by backtrace-symbols.c
which we're about to remove.
Closes#391, #460
The documentation for _cairo_array_append_multiple says "one or more items".
If it is called with num_elements=0, it ends up calling _cairo_array_grow_by
with num_elements=0, which if the array is currently empty (as here) leads
to undefined behavior in _cairo_array_allocate in the line
*elements = array->elements + array->num_elements * array->element_size;
because it ends up trying to add 0 to a null pointer. C doesn't allow this.
(UBSan flags this as "applying zero offset to null pointer".)
The error paths in _cairo_pdf_interchange_begin_dest_tag() do not clean
up and cause some memory to be leaked. Fix this by adding the necessary
free()s.
The first hunk, the missing free(dest) was found by oss-fuzz (see link
below).
The second hunk is an obvious follow up. It also cleans up the memory
allocated by _cairo_tag_parse_dest_attributes().
The cleanup in the second hunk is similar to the function
_named_dest_pluck() in the same function, but that function also removes
the entry from a hash table. The error case here is that exactly this
hash table insertion failed. Thus, the code cannot simply use the
already existing function.
Fixes: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30880
Signed-off-by: Uli Schlachter <psychon@znc.in>
A hash value is encoded in base 26 with upper case letters for font
names.
Commit ed984146 replaced "numerator = abs (hash);" with "numerator =
hash;" in this code, because hash has type uint32_t and the compiler
warned about taking the absolute value of an unsigned value. However,
abs() is actually defined to take an int argument. Thus, there was some
implicit cast.
Since numerator has type long, i.e. is signed, it is now actually
possible to get an overflow in the implicit cast and then have a
negative number. The following code is not prepared for this and
produces non-letters when encoding the hash.
This commit fixes that problem by not using ldiv() and instead using /
and % to directly compute the needed values. This gets rid of the need
to convert to type long. Since now everything works with uint32_t, there
is no more chance for negative numbers messing things up.
Fixes: https://gitlab.freedesktop.org/cairo/cairo/-/issues/449
Signed-off-by: Uli Schlachter <psychon@znc.in>
Someone apparently forgot to actually add the reference image. And also
forgot to add the test to meson. Sigh.
Signed-off-by: Uli Schlachter <psychon@znc.in>
When a recording surface with non-zero origin is
saved to a png file, it gets cut off. Fix this by
setting a device offset when acquiring the source
image.
asan was complaining that the limits struct goes out
of scope before it is used via the pointer in the polygon struct,
and it is right:
==386746==ERROR: AddressSanitizer: stack-use-after-scope on address 0x7ffd3ccebdfc at pc 0x7f783d5eaaee bp 0x7ffd3cceba80 sp 0x7ffd3cceba70
READ of size 4 at 0x7ffd3ccebdfc thread T0
#0 0x7f783d5eaaed in _add_clipped_edge ../src/cairo-polygon.c:351
#1 0x7f783d5ebba3 in _cairo_polygon_add_edge ../src/cairo-polygon.c:520
#2 0x7f783d5ebc82 in _cairo_polygon_add_external_edge ../src/cairo-polygon.c:530
#3 0x7f783d582149 in _cairo_filler_line_to ../src/cairo-path-fill.c:63
#4 0x7f783d588d9c in _cairo_path_fixed_interpret ../src/cairo-path-fixed.c:831
#5 0x7f783d582a44 in _cairo_path_fixed_fill_to_polygon ../src/cairo-path-fill.c:147
#6 0x7f783d6204fe in _cairo_spans_compositor_fill ../src/cairo-spans-compositor.c:1151
#7 0x7f783d5126de in _cairo_compositor_fill ../src/cairo-compositor.c:203
#8 0x7f783d5571f9 in _cairo_image_surface_fill ../src/cairo-image-surface.c:1003
#9 0x7f783d647f2f in _cairo_surface_fill ../src/cairo-surface.c:2424
#10 0x7f783d52ebea in _cairo_gstate_fill ../src/cairo-gstate.c:1312
#11 0x7f783d51cca4 in _cairo_default_context_fill ../src/cairo-default-context.c:1057
#12 0x7f783d6812d6 in cairo_fill ../src/cairo.c:2421
GTK has a testcase that tests the error when creating
an oversize image, and asan tells me that it triggers
a memory leak in cairo:
Direct leak of 160 byte(s) in 1 object(s) allocated from:
#0 0x7f1122755667 in __interceptor_malloc (/lib64/libasan.so.6+0xb0667)
#1 0x7f1120cc83e8 in _cairo_pattern_create_solid ../src/cairo-pattern.c:607
#2 0x7f1120cc8487 in _cairo_pattern_create_in_error ../src/cairo-pattern.c:630
#3 0x7f1120cc87cb in INT_cairo_pattern_create_for_surface ../src/cairo-pattern.c:736
#4 0x7f1120c1f1c7 in _cairo_default_context_set_source_surface ../src/cairo-default-context.c:327
#5 0x7f1120d8386a in INT_cairo_set_source_surface ../src/cairo.c:982
#6 0x7f1121d005a2 in gdk_cairo_set_source_pixbuf ../gdk/gdkcairo.c:234
#7 0x401427 in test_set_source_big_pixbuf ../testsuite/gdk/cairo.c:23
The expression &image_surface->base basically just casts the
cairo_image_surface_t* to cairo_surface_t*. However, technically it is a
NULL pointer dereference and UndefinedBehaviorSanitizer flags it as
such:
runtime error: member access within null pointer of type 'cairo_image_surface_t' (aka 'struct _cairo_image_surface')
This commit fixes this by adding a NULL check.
Signed-off-by: Uli Schlachter <psychon@znc.in>
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Merge tag '1.17.4'
cairo 1.17.4 release
We are not quite sure what happened, but the 1.17.4 tag and the master
branch have different Git histories, but the same content. The merge
commits are missing from the history of the tag. This merge is simply
the result of "git merge 1.17.4".
This fixes: https://gitlab.freedesktop.org/cairo/cairo/-/issues/446
X11 use uint16_t for the width/height of things. Anything too large will
be truncated when sending the request to the X11 server. This commit
adds a size check to a function that did not check things and then later
caused a segmentation fault.
Not adding a test case because the test case from the below bug report
allocates 3,5 GiB of memory, which I find too much for a test.
Fixes: https://gitlab.freedesktop.org/cairo/cairo/-/issues/414
Signed-off-by: Uli Schlachter <psychon@znc.in>
