Both QFont::handle() and QFont::freetypeFace() used to
be available in Qt 4 but were removed in Qt 5. There's
currently no API to get access to the native font handle,
which the font engine holds in a way or another.
Similar to the way it was in Qt 4, the actual handle type
depends on the font engine currently in use. The types map
as follows:
Font Engine Native Handle
------------------------------------
DirectWrite IDWriteFontFace *
Freetype FT_Face
Mac CTFontRef
Win HFONT
All other font engines return a null handle.
Change-Id: I3bea8259ac1378fd24079723aa6603bf9e74834c
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Reported by UBSan:
src/gui/text/qfontengine_ft.cpp:1079:54: runtime error: null pointer passed as argument 1, which is declared to never be null
The default-constructed QScopedArrayPointer is not
reset() in every code path. In fact, in the code
path leading to this memset, the only reset() call
is in the if block right above it, so move the
memset into the if block.
Change-Id: I1f793c313ca56f3315c6bdd55456cb025cafc089
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
gui/text/qfontengine_ft.cpp(1743,5) : warning: variable 'bytesPerLine' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
gui/text/qfontengine_ft.cpp(1743,5) : warning: variable 'format' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
The default branch is marked Q_UNREACHABLE, but apparently Clang does
not recognize it.
Task-number: QTBUG-50804
Change-Id: Idfce8cb2b9a481dd67a18d9952b920ad4f71e0f4
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
For non-scalable fonts, the units_per_EM in FreeType is
documented to be undefined and will default to 0, which means
that any division by it will cause an exception.
The emSquareSize() function already checks if the font is scalable
and returns y_ppem if not, so lets use it instead in all locations
where we're not already sure the font is scalable.
[ChangeLog][Text][Freetype] Fixed a divide-by-zero exception
when accessing bitmap fonts.
Change-Id: I8839d4c83047fb3f6bb4d69af0258e94a258a4d9
Task-number: QTBUG-45963
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
When increaseCost() is called then it will convert from bytes to kilobytes
so we need to specify the cache_cost to be in bytes.
Task-number: QTBUG-47812
Change-Id: I842514c9ab4d86b60b2beb6c80979156ea0de59c
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Avoids in-loop check for every pixel by costs of slightly bigger code.
Change-Id: I8321d0945ac6b677786431670b2316c60e4db492
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Use an optimized version of the intra-pixel filter found
in FreeType's _ft_lcd_filter_legacy().
Gives us somewhat better accuracy and better performance.
Change-Id: Id4200b67e6ff55f605037c3e5464fef8bb03fbde
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Precalculate everything we can and use faster loop.
Make inlined as it is used just in a single place.
Change-Id: If3c33d60739eb4ce896020321442ae81edd1c13d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
The logic used in the FreeType font engine can be generalized
and move to the QFontEngine baseclass. This allows the CoreText
font engine to correctly report the minimum left/right bearings,
which decreases the chance that an optimization in QTextLayout's
line breaking algorithm will produce wrong results.
The calculation of left and right bearing has been moved to the
glyph_metrics_t type to reduce code duplication. This allows us
to use the with and height of the bounding box to determine if
the glyph has any contours.
Change-Id: I864697d3f31ed56f22f04666199b6c5023c5e585
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Preparation for also using it from QCoreTextFontDatabase.
Change-Id: I9cbef59c21f343a88a5cb3fdbee1ed4791d7a36e
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>
It should also be possible to use QT_STRICT_ITERATORS in Qt's own code base
Change-Id: I0914db480d4d2b06e71e3a2588163efdd3ff6d27
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Use GlyphInfo as a temporary buffer for storing the glyph metrics
and go through the same code for fetchMetricsOnly and !fetchMetricsOnly.
Change-Id: If8bb85056e5f09588cc3956b43dc51a54d5aecfe
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Move some variables initialization closer to the usage context.
Change-Id: I0f1de0ddc9f0fbe3ec4a56455ccc14f9e8d94e5a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Make it consistent with fetchMetricsOnly path.
Change-Id: I6a2d2568d5579255582217515a4e598722547c60
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
...for both cached and non-cached modes, by disabling hinting
for transformed glyphs in loadGlyphFor().
Change-Id: I13766a653ebd72cbed0f5c38ca3536d042aed762
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
The glyph returned by loadGlyph() must be freed manually when caching
is not enabled, except when it is a placeholder for a missing glyph.
This is a fix-up for d18ccbb5be.
Task-number: QTBUG-32792
Task-number: QTBUG-44812
Change-Id: I410fa1b7703e306739d9dae35fff06af6c79dce0
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
In case the loadGlyph() was called for a glyph to fetch metrics only,
loadGlyphFor() never fetches the data for that glyph
but returns a non-null result.
Change-Id: I2b258c4b7880059d41dc02f1e5a43903706d3888
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
and only cache non-scalable glyphs in defaultGlyphSet
if a requested transform is translation.
Change-Id: I49d936736871bd455e573335c014ddefe8bb915e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
And avoid conversion when the cached FT transform could be used.
Change-Id: I9f6bf0a6c6fa166092de698f3ddbbf203e2b3820
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Also track the allocated buffer length and re-use the existing
buffer instead of allocating a smaller one, where possible.
Change-Id: I494519d653522622b1fe4ec80ac9035e2c3d9714
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Outdated header.LGPL removed (use header.LGPL21 instead)
Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)
Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination
Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
Change c238d34137 was a refactoring
which slightly changed behavior. In the case of fetching the
alpha map's bounding box, before we would call loadGlyph()
even for the case of outline drawing, as the correct bounding
rect is still needed for this case. In loadGlyphFor() however,
0 was always returned for this case, as it was only used for
populating the cache.
The simple fix for this is to add a bool to loadGlyphFor() which
adapts the original behavior when set, similar to the
fetchMetricsOnly bool in the loadGlyph() functions.
Change-Id: I76296c8aaeddbdae9e4c27ed2b30b7d59ff0843b
Task-number: QTBUG-44273
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Pasi Petäjäjärvi <pasi.petajajarvi@theqtcompany.com>
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
...and get rid of workarounds for older versions,
which also makes the code more readable.
Change-Id: I087110c5f60cd664dad241776e1a0df901989c75
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
This method is not being called anywhere.
Change-Id: Ia32e8b48d324e4848db666de4d274a260d22b06d
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
The Fira Sans font by the Mozilla Foundation has bytecode that goes
into an infinite loop. Fortunately FreeType catches the case, but we
fail to render any glyphs and spends too long trying the bytecode on
every glyph.
This patch instead switches the font to auto-hinting when this error is
encountered.
Task-number: QTBUG-41034
Change-Id: Icd044b41396a06fb435bc189cdbd71d703107de6
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Only reproduced with Windows font Calibri. This font has both
outline (vector) and bitmap glyphs. QFontEngine_FT has an hack
to get metrics from EBLC table, but this might fail, resulting
in a 0 ascender and descender, meaning QFontMetrics::height()
will be 0, meaning totally broken text.
This patch checks for that failure, and fallbacks to the outline
metrics instead of the bitmap ones.
Task-number: QTBUG-42898
Change-Id: If33fc3404d0c7f84557f8c4a5ae71b30f78d60a7
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Must have been a copy paste mistake, the check is used in other places
to make sure we don't unlockFace() without a lockFace(), but here
we're certain lockFace() was called first.
Makes Coverity happy.
Change-Id: I679129727b29a40d780f4fa903f44f7cbc9ec8cf
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=b3500af717010137046ec4076d1e1c0641e33727
../gui/text/qfontengine_ft.cpp: In member function ‘QFontEngineFT::Glyph* QFontEngineFT::loadGlyph(QFontEngineFT::QGlyphSet*, uint, QFixed, QFontEngine::GlyphFormat, bool) const’:
../gui/text/qfontengine_ft.cpp:1126:39: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
for (int x = 0; x < slot->bitmap.width; x++) {
Change-Id: Idb58f9e5895aac8c02163870d7c7d4a49237086b
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
This removes some code duplication in the QFontEngineFT and
it also removes the condition that loadTransformedGlyphSet()
will return 0 if the font is too large to be cached, since
this is handled by setting outline_drawing on the glyph set which
will fall back to painter paths.
Change-Id: I2fe6a963e854cdd7c6015154547dc06325cbe3b0
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
In Qt Quick (or in Qt Widgets when setting QT_NO_FT_CACHE to 1 or
when using OpenGL engine), the alphaRGBMapForGlyph() will be used
to get glyphs, because we need to keep our own cache. Transforms
was not supported in this code path, instead it was turned off
in supportsTransformations().
This patch enables transformations in the alphaRGBMapForGlyph()
and alphaMapForGlyph() code paths as well, since this is needed
for proper rendering with QT_DEVICE_PIXEL_RATIO.
Change-Id: I7d6b79918f7c0bcc051a8343b16b315bfbba59cf
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
When running an application which called e.g. QPainter::drawText under
Valgrind, it would produce "Conditional jump or move depends on
uninitialized value(s)" warnings, since we were allocating a buffer for
a FreeType bitmap without initializing its contents. FreeType,
apparently, does not set the value of all bytes in a bitmap buffer when
it is used as a FT_Bitmap, so we were left with some uninitialized
memory which was still being used.
This commit fixes these warnings, and prevents any potential undefined
behavior.
[ChangeLog][QtGui][General] fixed use of uninitialized memory in the
FreeType font engine
Change-Id: Ia7b3595c78310ce41f76cb4546fc36016c0000a8
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Extend the QImage format with two 8-bit grayscale and alpha formats.
These formats have the advantage over Indexed8 that they have simpler
conversion and can be rendered to by the raster engine.
[ChangeLog][QtGui][QImage] Added support grayscale and alpha 8-bit
formats which can also be rendered to.
Change-Id: I4343c80a92a3dda196aa38d0c3ea251b094fc274
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
Some fonts appear to include zero-width space in the CMAP table, but
not include an actual definitions of the glyph they point to. The
missing glyph causes a warning, but isn't handled making the character
end up being giving the same metrics as whatever character it came after.
This patch adds explicit handling of missing glyphs, and also caches
their missing state when caching is enabled.
Task-number: QTBUG-40912
Change-Id: I06fba9c01df59548e750e36babfdd5a6bafd6bd0
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>
We set FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH as the default load flags
for freetype fonts, but due to using = instead of =| the default flags
gets overridden when outline drawing sets FT_LOAD_NO_BITMAP.
Change-Id: I26b45aa2bbf613689d278eb07ae028ef9757023c
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Gabriel de Dietrich
Marc Mutz
Friedemann Kleint
Eskil Abrahamsen Blomfeldt
Liang Qi
Andy Shaw
Konstantin Ritt
Tor Arne Vestbø
Andreas Hartmetz
Sérgio Martins
Frederik Gladhorn
Jani Heikkinen
Simon Hausmann
Rafael Roquetto
Simon Hausmann
Allan Sandfeld Jensen
Axel Rasmussen
Oswald Buddenhagen
Matti Paaso