Add functions which converts to and from JavaScript
data arrays:
static QByteArray::fromUint8Array(emscripten::val array)
emscripten::val QByteArray::toUint8Array() const
with corresponding internal qstdweb API:
static Uint8Array Uint8Array::copyFrom(const QByteArray &buffer)
QByteArray Uint8Array::copyToQByteArray() const
Both functions will make a copy of the data, i.e. there
is no shared reference counting. They take and return
Uint8Array typed array views, via emscripten::val JavaScript
object references.
Unlike other native conversion functions, these have
the special property that the data referenced by the
native Uint8Array exists outside the heap memory area.
This means we can’t e.g. memcpy the data. However, the
heap is itself a JavaScript ArrayBuffer, and we can
create a Uint8Array view to the buffer owned by the
QByteArray, and then use JavaScript API to copy. See
the qstdweb::Uint8Array::copy() implementation.
That also means that a fromRawUint8Array() variant
(which does not copy) is not possible to implement,
since we can’t create a pointer to the source data.
The inverse toRawUint8Array() is implementable - it
would return a Uint8Array view which references the
heap’s ArrayBuffer. However, this may turn out to be
ill-advised, since Emscripten will create a new ArrayBuffer
if/when it resizes the heap. In any case this left for
a future expansion.
Change-Id: Icaf48fd17ea8686bf04cb523cc1eb581ce63ed34
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Make the browser compositor draw the window non-client area (using css
+ html). Get rid of OpenGL usage in non-OpenGL windows and use canvas
2d context instead to blit the texture (QImage).
Also, as part of the change, remove the deprecated canvas element support
in QScreen.
Fixes: QTBUG-107116
Fixes: QTBUG-107219
Change-Id: I65f0d91831c806315685ca681ac0e416673f5cd5
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Aleksandr Reviakin <aleksandr.reviakin@qt.io>
Reviewed-by: David Skoland <david.skoland@qt.io>
The two symbols are linked in & exported by using a publicly
visible symbol emscripten_set_wheel_callback. To actually link it,
but avoid calling it, a volatile false boolean flag is used in a
guarding if.
This should ideally be done by setting DEFAULT_LIBRARY_FUNCS_TO_INCLUDE,
but a cmake bug (see QTBUG-108444) is preventing this.
Fixes: QTBUG-108423
Task-number: QTBUG-108444
Change-Id: I6b0406d1059dcec63b3942468e210c53292ffe90
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Emscripten does not support EM_JS from side modules
Change-Id: I9c29d112fc0a5ab7830e1cadd0af77829c69d0a9
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Asyncify is a scoped object within emscripten runtime main function.
Use of EM_JS seems inevitable at this point.
Change-Id: I4852a7054a5e01583139cb54a0e14f604ac8ed13
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
The new function has an advantage of not requring EM_JS.
Change-Id: Ib9ad0e6b59cfe2e6864697a14b5cfdb39f62af2d
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
This helps get ready for wasm64
Change-Id: I6db5b93c7ca851cab7fc95701b27a20263c8c0bd
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
QFileDialog::saveFileContent, QFileDialog::getOpenFileContent are now
using local file APIs to access files on any browser that passes a
feature check.
The feature is thoroughly tested using sinon and a new mock library.
Task-number: QTBUG-99611
Change-Id: I3dd27a9d21eb143c71ea7db0563f70ac7db3a3ac
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Since we cannot rely on the clients specifying a suitable CSP that will
not forbid execution of js injections, we have to refrain from using
any explicit <script> elements. To keep the promise system working, a
thunk pool was introduced which keeps track of a limited pool of promise
callback exports. In case the resources are busy, pending calls are
enqueued. This works since the JS Promise.then/catch/finally always fire,
even on ready/failed promises.
As the situation of full thunk pool allocation is unlikely to happen
en masse IRL, the solution should not adversely affect the performance.
Heavy unit tests were created to confirm the solution works as expected.
Task-number: QTBUG-99611
Change-Id: I0e6982d4ee76a4263b59e72b004b3ff2f167e4df
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Currently, to use a promise from C++ we either have to use an ASM block
(which does not work well with dynamic linking) or declare exports in
the EMSCRIPTEN_BINDINGS block, which is cumbersome and cannot be chained.
This solution makes it easy to use js promises by introducing the
WebPromiseManager which dispatches callbacks to appropriate callers when
available.
This is a preliminary patch for FileSystem support, which will heavily
use async APIs.
Task-number: QTBUG-99611
Change-Id: I368a8f173027eaa883a9ca18d0ea6a3e99b86071
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Found by codespell
Pick-to: 6.4
Change-Id: Ie3e301a23830c773a2e9aff487c702a223d246eb
Reviewed-by: Nicholas Bennett <nicholas.bennett@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Files that have to be modified by hand are modified.
License files are organized under LICENSES directory.
Task-number: QTBUG-67283
Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
Make ~EventCallback() not clear properties belonging to
other EventCallback instances.
This fixes File::stream(), which creates a new EventCallback
before deleting the old one when updating the callback
function.
Pick-to: 6.3
Change-Id: Ib5f78ccc4158d94e8d3f5b9ebb9979c123b1966a
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
These are sometimes needed for passing objects on
to native API.
Change-Id: I89a1a95e6d51932ae3b49eec072261bcb5dbb463
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
We are storing a copy of the this pointer in the constructor,
and later deference it to access EventCallback object
memebers. This makes the class noncopyable: delete
the copy constructor to make sure it isn’t.
Also change the callback API to propagate the event
to the event callback.
Change-Id: Ida4bb192b3e905b260ebeec30293aad71b7d8c49
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Convenience getters for mime type associated with the object.
Change-Id: I7e3530459e50ac4740d533db59c46e838c94dbcd
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Add Uint8Array::copyFrom() and Blob::copyFrom(), which
constructs JS data containers with content copied from
the C heap.
These should not be confused with e.g. the Uint8Array(buffer, size)
constructor, which creates a Uint8Array which references
content on the heap, without making a copy.
Change-Id: Id7d25d8044ee3914d74698e5a15c93226568eaf3
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
This function is useful also outside of local file access,
for example when reading clipboard (file) content.
Change-Id: I132546deb6df2969467051c348c05d9331d2cfd2
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Prevent namespace collisions and make sure Qt functions
are grouped together.
Change-Id: I217188ee93e4300e273d10a79d6014179fc5a1ef
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
qstdweb provides a C++ API covering parts of the DOM API
useful for implementing Qt. This currently includes
ArrayBuffer, Blob, File, FileReader, and Uint8Array.
The implementation uses emscripten::val, which currently
proxies via JavaScript, but should at some point be
able to acccess the DOM directly, once WebAssembly
gains such access.
This API should be easier to use than the string-and-casting
emscripten::val API. It is currently private, and can
be changed and extended as needed.
Change-Id: I95a2ad735e511c8da61f3cc21357fbffe3b05d8e
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Morten Sørvig
Mikolaj Boc
Lorn Potter
Kai Köhne
Lucie Gérard