As reported in <https://bugs.php.net/64641> 1-dimensional horizontal
filled polygons are not drawn at all. That is caused by the scanline
algorithm used for drawing filled polygons which skips the drawing of
horizontal edges, because that is normally not necessary. If, however,
the polygon consists of horizontal edges only, that obviously doesn't
work, so we add a special case handling.
(cherry picked from commit f9f10fa9d4)
Thick lines are drawn by gdImageFilledRectangle(), which iterates over
the x ordinate first (Z order) to apply the style pattern. While this works
fine for vertical and diagonal lines, it obviously fails for horizontal
lines, which have to be iterated over in N order.
To fix this bug, we introduce the helpers gdImageFilled(H|V)Rectangle(),
which may be reused for other purposes as well.
In API gdImageLine()
if `dx == 0` Checked and return else if `dy==0` Checked and return.
if ((dx == 0) && (dy == 0)) never TRUE , code has no impact , can be removed.
This changeset imports documention for gdImage to gdImagePng*() into
Natural Docs. Documention is based on the text of the original
manual, version 2.0.36 but adapted to better suit the format.
Subsequent changesets will introduce docs for subsequent manual
entries.
naturaldocs, when present, is invoked by bootstrap.sh. The completed
manual will be in docs/naturaldocs/html/index.html. It can also be
explicitly invoked by running docs/naturaldocs/run_docs.sh.
This change also removed docs/naturaldocs/project/Menu.txt, since it
currently contains no non-generated content and is prone to introduce
noise into the changeset.
This change adds naturaldoc comments for the above function and type.
Text was adapted from the 2.0.36 manual.
It also fixes the formatting of the comment for gdInterpolationMethod
so that naturaldoc will extract it.
Christoph M. Becker
Pierre Joye
Ondřej Surý
Mike Frysinger
sherif-elmetainy
Jitendar Kumar
Remi Collet
Nathanael Jones
Tim Toohey
Chris Reuter
Takeshi Abe
pierrejoye