The bug here is very subtle, as is the mitigation.
Quick background on WASM memory, there is an object
called wasmMemory (which might be hoisted into scope for
CanvasKit's pre-js functions), of type WebAssembly.Memory
which is a resizable ArrayBuffer. Emscripten provides the
JS code to initialize this and handle size increases.
Emscripten also provides TypedArray "views" into this buffer.
These are called CanvasKit.HEAPU8, CanvasKit.HEAPF32, etc.
When there is a call to CanvasKit._malloc, wasmMemory may
be resized. If that happens, the previous TypedArray views
become invalid. However, in the same call to _malloc,
emscripten will refresh the views [1]. So, dealing with
CanvasKit.HEAPU8 directly (quick aside, we never expect clients
to mess with these views, only us in our glue JS code
[e.g. interface.js]), should always be safe because if they
were to be invalidated in a call to _malloc, the views would
be refreshed before _malloc continues.
The problem that existed before was when we were passing
CanvasKit.HEAP* as a parameter to a function, in which the
function would call _malloc before using the typed array
parameter:
//... let us suppose wasmMemory is backed by ArrayBuffer D
copy1dArray(arr, HEAPU32);
// The HEAPU32 TypedArray (backed by ArrayBuffer D) is stored
// to a function parameter "dest"
function copy1dArray(arr, dest, ptr) {
// ...
if (!ptr) {
ptr = CanvasKit._malloc(arr.length * dest.BYTES_PER_ELEMENT);
// Suppose _malloc needs to resize wasmMemory and is
// now backed by ArrayBuffer E.
// Note: The field CanvasKit.HEAPU32 is correctly backed
// by ArrayBuffer E, but variable dest still points to a
// TypedArray backed by ArrayBuffer D.
}
// dest.set will fail with a "neutered ArrayBuffer" error
// because ArrayBuffer D is effectively gone (replaced by E).
dest.set(arr, ptr / dest.BYTES_PER_ELEMENT);
The fix here is to pass in the field name indicating the TypedArray
view we want to write our data into instead of using the
view itself as the parameter.
[1] e427159553/src/preamble.js (L344)
Change-Id: I46cfb98f8bdf928b61690a5ced034a5961356398
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294516
Reviewed-by: Nathaniel Nifong <nifong@google.com>
Mainly rearranging the code to perform all ICU iterations once
and cache the results for the next text layouts.
Change-Id: I514d04229d04778c1f2238064acccddf6b548c00
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294400
Commit-Queue: Ben Wagner <bungeman@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
This reverts commit cc6349d390.
Reason for revert: Problems with MSAN
Original change's description:
> ICU optimization
>
> Mainly rearranging the code to perform all ICU iterations once
> and cache the results for the next text layouts.
>
> Change-Id: I2c2a502c705510eb169bf62efbfcc13b658591e3
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293336
> Commit-Queue: Julia Lavrova <jlavrova@google.com>
> Reviewed-by: Ben Wagner <bungeman@google.com>
TBR=bungeman@google.com,jlavrova@google.com
Change-Id: I7f7f759178c10349b4c879bafc68a7f8e1065b6a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294398
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
Mainly rearranging the code to perform all ICU iterations once
and cache the results for the next text layouts.
Change-Id: I2c2a502c705510eb169bf62efbfcc13b658591e3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293336
Commit-Queue: Julia Lavrova <jlavrova@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Move SkFontHost_mac.cpp into an 'optional' like the other fontmgr build
rules. This allows building with other fontmgrs on Mac and makes the lib
dependencies explicit. In the future this helps with splitting the out
the default factory.
Change-Id: Iecef9e428acb69f89b54afa00b4e779f5858c61a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294076
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
The current code does an extra ref on the SkTypeface returned from
SkFontMgr::matchFamilyStyle. This old API needs to be updated to return
sk_sp<SkTypeface> instead of a ref'ed bare SkTypeface*.
Bug: skia:10325
Change-Id: I191b494fb86b99fc53b6eb850d65ba73e60dc489
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294038
Auto-Submit: Ben Wagner <bungeman@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Also confirm that Flutter Web and Canvas represent colors
as ints in the same way.
Change-Id: Ie8c2f9a48542510063c9bbc408a8047e0cc3969f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293840
Reviewed-by: Kevin Lubick <kjlubick@google.com>
CanvasKit converts 4 floats to an int, just to have it be
converted back into 4 floats when it goes into the paint.
Change-Id: I93cf1c596283b83cc9452fb205b7000ceed09bb9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293538
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Mike Reed <reed@google.com>
There's some flakes on the _dommatrix test. This adds an extra assertion
to maybe shed some light on that flake.
Change-Id: I548d3294c8f3c620a9702e4d4889da745a2d91fe
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293764
Reviewed-by: Kevin Lubick <kjlubick@google.com>
We force animation in order to measure fps.
HINT: Launch chrome with --disable-frame-rate-limit and
--disable-gpu-vsync in order to measure frame rates above 60.
Change-Id: I08fae8fc2eb65930f81110999a64eed9df9c704f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292994
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Forward declaration for PropertyObserver should work, but some G3
builds/configs are barfing...
TBR=
Change-Id: I47fc8d24d4e706df470c010c8fce13f07d726fd8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293340
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
At startup, we allocate a few scratch arrays and then use those
instead of having to malloc and free a bunch of arrays during
runtime.
The benchmark that was added is a bit noisy (probably because
of the garbage collection going on from the created Float32Arrays),
but a few percent faster.
We also don't set the paragraph background/foreground colors to
transparent because we check them being falsey before sending them
over the wire. I noticed that if foreground was transparent black,
no text shows up at all, which was unexpected.
Change-Id: I9f3a590a122d7de222cb5f58ea40e86b2d261c96
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292685
Reviewed-by: Nathaniel Nifong <nifong@google.com>
This reverts commit 97fe0cbed2.
Reason for revert: ASAN failures
Original change's description:
> Omit dead SkSL functions
>
> Now that SkSL inlines functions, dead functions are very common. This
> change causes them to be omitted from the final output.
>
> Change-Id: Ie466a3f748812eff1a368498365c89d73ab0b7be
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292684
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
TBR=bsalomon@google.com,brianosman@google.com,ethannicholas@google.com
Change-Id: Id20c5be67dd574d30d6f978ba610e43aa5018416
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293241
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Now that SkSL inlines functions, dead functions are very common. This
change causes them to be omitted from the final output.
Change-Id: Ie466a3f748812eff1a368498365c89d73ab0b7be
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292684
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Surface clients can now specify a dirty rect that will constrain HTML canvas
repaints to a particular region.
Bug: NONE
Change-Id: Ia77d6e864c061297bfc82cfa09030523052ee0e1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293056
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Parts of third_party need the C++ API so hide it from Skia users as
needed to prevent re-introduction.
This also avoids the ICU version renaming / name mangling when building
our own test version of ICU. This makes life in an editor and debugger
much easier.
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292854
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Change-Id: Id636fbf9e750fe72a4ace8a59fb9acac839a07c4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292967
Reviewed-by: Ben Wagner <bungeman@google.com>
This reverts commit 5ef0d2f6c0.
Reason for revert: Sharing a build with flutter is crazy pants.
Original change's description:
> Hide ICU C++ API from Skia users.
>
> Parts of third_party need the C++ API so hide it from Skia users as
> needed to prevent re-introduction.
>
> This also avoids the ICU version renaming / name mangling when building
> our own test version of ICU. This makes life in an editor and debugger
> much easier.
>
> Change-Id: I8fb1903e2b31e9dd04efa22173a03115d629c232
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292854
> Reviewed-by: Julia Lavrova <jlavrova@google.com>
> Commit-Queue: Ben Wagner <bungeman@google.com>
TBR=bungeman@google.com,reed@google.com,jlavrova@google.com
Change-Id: If238225b20a6b73064e3b16c5e0bdc89760e522d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292966
Reviewed-by: Ben Wagner <bungeman@google.com>
Calling the 'AndOptions' version with nullptr for the options on 10.13
is reported to crash. Since the options are unused, use the version of
the call without them.
Bug: skia:10282
Change-Id: I6674b0230f403744c9dd471245eeb3a78c2a4417
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292727
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Parts of third_party need the C++ API so hide it from Skia users as
needed to prevent re-introduction.
This also avoids the ICU version renaming / name mangling when building
our own test version of ICU. This makes life in an editor and debugger
much easier.
Change-Id: I8fb1903e2b31e9dd04efa22173a03115d629c232
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292854
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Fix a bug with paragraph text direction that an incorrect unit test wasn't detecting.
Change-Id: I73418ea8a90da097078d93ddf8692a55488f672f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292366
Commit-Queue: Nathaniel Nifong <nifong@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
No longer used, but managed to avoid previous capture by being included
in quotes instead of brackets. Do some iwyu while at it.
Change-Id: I838474132995ca130c93f94beaab606828504309
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292733
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
This is mostly about consolidating and removing use of
icu::UnicodeString. It was used mostly as an intermediary for
conversion, and the new conversions should make one fewer copy of the
data.
Change-Id: I1d0e5f0dc21c47ed7c80f456b9129c4c9a36b09a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292718
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Also enables ccpr and makes flags parsing more robust.
Change-Id: Ia98467403de87423a63167681b2ee635b0fa593a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292690
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
If ever CanvasKit accepts an array as a parameter, if the array
provided was produced by Malloc, CanvasKit will use the pointer
of that array and not free it after.
Change-Id: I4806a48e5e030edd787944f652984ea3516b3022
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292561
Reviewed-by: Nathaniel Nifong <nifong@google.com>
Most of the lines here are the result of running iwyu to get the right
includes after removing all the offending includes. A few constants need
to be had from the C api instead of the C++ API to make this work. The
SkParagraphTest and SkParagraphImpl are still using C++ API with
icu::UnicodeString, which will be cleaned up later.
Change-Id: I0f7f630d55bc600eaa8700c8b48758ee6af2c3fb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292676
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
The new loader works by checking for a "slide" flag, and if it ends in
".skp", then we treat the slide name as a URL and try to pull it in with
an HTTP request and parse it as an SkPicture.
It is the user's responsibility to copy or link skps into their
canvaskit server directory.
Change-Id: Iaafa84300d36d2d5a0bb29c47761ec67076c0f50
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292204
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Adds a simple system for the user to supply flags via the location hash.
e.g., "http://.../viewer.html#msaa:8"
Implements the msaa flag by rendering to a multisampled offscreen
framebuffer, then blitting it to the main canvas framebuffer.
Change-Id: I7f2b8b769e491f2169fd6b967a72a8ea9c8ffb8b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292199
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
