This patch adds an initial implementation, along with test cases, for the
memory.fill and memory.copy instructions that form part of the
bulk-memory-operations proposal at
https://github.com/WebAssembly/bulk-memory-operations/blob/master/proposals/bulk-memory-operations/Overview.md.
This covers code generation for the baseline and optimising compilers, as
well as supporting infrastructure for conversion to/from binary and text
representations.
The implementation is simple in the sense that -- for both compilers -- it
is done by a call to a helper function, which eventually devolves to a call
to memset/memmove respectively.
Per subsequent clarification requests:
* https://github.com/WebAssembly/bulk-memory-operations/issues/8
The arguments to these instructions are all interpreted as unsigned 32 bit
ints.
* https://github.com/WebAssembly/bulk-memory-operations/issues/11
Zero length fills/copies that have starting point offsets out of bounds
trap rather than are treated as no-ops.
--HG--
extra : rebase_source : 79c74cbe467905f03b796428ee80b643c105ca72
When a transform thinks it's animated we should abandon screen rasterization
and instead favour local rasterization. This produces a more visually
pleasant rendering, as pixel-snapping "wobbles" the text between
frames.
The float scale of GlyphRasterSpace::Local is currently unused, but this
PR tries its best to set it to a reasonable value, based on discussion
with glennw about the intended semantics. We agreed it should specify
the scale *relative* to the parent stacking context, which means it's
just whatever scaling the stacking context's transform applies. It's
possible we'll need to clamp this value or make it properly 2-dimensional
later on.
Some book-keeping is added to StackingContextHelper to ensure that
GlyphRasterSpace::Screen is never requested by a descendent
of a stacking context using GlyphRasterSpace::Local.
nsDisplayMask is changed to use a StackingContextHelper to ensure
rasterSpace is properly propagated.
In addition, this is the first commit making use of cbindgen's new support
for bridging Rust enums natively into C++! This bumps our minimum cbindgen
to 6.0.0 (just released).
MozReview-Commit-ID: 9AlsB6nUheB
--HG--
extra : rebase_source : 247e5b197e998682cb4bb74f6f9319a9a4dd3264
The main thing to have into account is that the styleset to use is either
mLastStyleSheetSet, or mPreferredStyleSheetSet.
This last one gets set from Loader::IsAlternateSheet, which is quite nasty and
what I'm trying to remove.
MozReview-Commit-ID: BI4P1Chqtli
The patches in this bug makes layout get more accurate values. That apparently
is confusing WebRender, which renders one more pixel height in some of the
rectangles.
I have no idea why and I couldn't repro out of the reftest harness. I suspect
something something blob invalidation, but...
MozReview-Commit-ID: A2slTJLfJBx
The original code was added in bug 385263 for fixing bug 279032 that a
single font provides zero for max ascent / descent in its HHEA table
which caused Firefox to crash.
Unconditionally picking the maximum of max ascent / descent and their
em correspondents doesn't seem to be essential for working around that
case, so this patch changes it to just use the em ascent / descent when
both max ascent and descent are zero.
This fixes a webcompat problem related to Roboto font on Linux (and
presumably also Android given it uses FreeType backend as well).
MozReview-Commit-ID: EpKrfiOwnZt
--HG--
extra : rebase_source : 0619abf992fb1e1a1f3068ab172880913ebff1f1
Narcis Beleuzu
Tim Taubert
Emilio Cobos Álvarez
Issei Horie
Cosmin Sabou
Julian Seward
Alexis Beingessner
Mihai Tabara
Jeff Walden
Andreea Pavel
Andreea Pavel
Andrea Marchesini
Mats Palmgren
Kearwood Gilbert
Jan-Erik Rediger
Xidorn Quan
Dorel Luca
Csoregi Natalia
Ekanan Ketunuti
Olli Pettay
Tom Prince
Brindusan Cristian
Gabriel Luong
Thomas Wisniewski