EMF and WMF import now plays the records with the shared craft-metafile
reader (storytold/craft-libs#778, at the craft-libs rev the SVG, EPS and
DXF crates already use) and maps its picture onto the document here:
paths with their fills, strokes, caps, joins, miter limits and dashes,
clipping groups, images and point type. The EMF and WMF record players in
crates/metafile/src/import and the DIB decoder they used are removed. The
writers are unchanged, and the PICT reader keeps its own player.
What changes for a file being opened, placed or pasted, and for an EPS
file's Windows metafile preview (read when its PostScript can't be):
- An EMF that draws with EMF+ records is read from them. It opened empty,
with a warning that EMF+ is not read. A file with both kinds of record
is read from its EMF+ records too.
- Hatched and pattern brushes fill with the average color of the brush's
tile, translucent where the tile has gaps. Hatches filled with the hatch
color and pattern brushes with gray.
- Translucent fills, strokes and EMF+ text keep their alpha as opacity.
- Text keeps a stretch across from the world transform; it kept only the
turn. Text the file clips to a rectangle is clipped to it, and an
underlined or struck-through font gives underlined or struck-through
type.
- A clip path whose bounding box holds the whole picture is kept unless
it is that rectangle; a diamond or a bow tie around the picture was
dropped.
- Images drawn with SRCAND, SRCPAINT or SRCINVERT are drawn as they look
over white, and images drawn with other raster operations are drawn as
a plain copy. They were left out with a warning.
- Excluded clip rectangles and the other clip region modes are applied.
A clip path combined with RGN_OR, RGN_XOR or RGN_DIFF is ignored
without the warning it gave.
- An image past the reader's size or pixel limits, or one that can't be
decoded, is left out without a warning of its own. A file past the
reader's limits (more than 32 nested clip paths, 200,000 drawn items,
256 MiB held) is read up to that point without a warning.
- An EMF record whose size is not a multiple of 4 ends the file, with the
"ends early" warning.
Tests: an EMF+ only picture imports its fill (it failed before), a dual
EMF+ file draws its translucent EMF+ fill and not its fallback, hatch and
pattern brush colors, clipped and underlined text, excluded clip
rectangles, a shared clipping group, an odd record size, WMF at 1440
units an inch without a placeable header and at its own units with an
inverted box, an EMF without a frame, diamond and bow-tie clips, text with a
stretch, clips nested past the stack and 200,000 clip records; the fuzz
test gains random EMF+ records.
dotCooCoo