This reverts commit a9238292.

It also reverts follow-up commits:
  87755d04
  c2c710e5
  cc8a76ce



The new implementation is much too slow because it will cause each
section of the border image to be uploaded to the atlas, and it will
not be shared between different border images nor between different
sizes of the border. The performance regression is so significant
that it's not worth it for the original bug fix.

We leave the tests around, so some of those might regress due to
this.

Change-Id: I3f56f4564255ebb77e6487881a6a11b19ad0234e
Task-number: QTBUG-42288
Task-number: QTBUG-35838
Reviewed-by: Michael Brasser <michael.brasser@live.com>

Just copy the one from QSGSharedDistanceFieldCache with some
compile fixes to the superclass so we store the default cache
as well.

Change-Id: I1fcc390601eea58f8b7729c9cead418e4c94714c
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

This logic changed then timing for when the layer's m_dirtyTexture
was set and unset, which had some side effects. Revert to the old
and known-to-work behavior of using a connection.

Change-Id: I4048e7ae70491afe36b2d766e6c506d9febc44ed
Task-number: QTBUG-41451
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Reviewed-by: Giulio Camuffo <giulio.camuffo@jollamobile.com>
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

Keeping all patches of the border image in the same texture
with different sample points can cause parts of the border
to bleed over to the center patch. To rectify this, we
create a separate texture for each of the nine patches we
need, and separate image nodes.

To avoid applying antialiasing on the interior edges of the
border image, we introduce new antialiasing flags which can
be used to specify precisely which edges of the image should
be antialiased.

[ChangeLog][BorderImage] Fixed possible pixel bleed between
border patches and center patch in BorderImage.

Change-Id: Icc292b3969217320eecca99e79675316c42eab08
Task-number: QTBUG-35838
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>

This allows the scenegraph backend to customize how QSGPainterNodes are
rendered.

Change-Id: I640dcf121d0be6bda615cf30591d502329fc89d0
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>

- Renamed LICENSE.LGPL to LICENSE.LGPLv21
- Added LICENSE.LGPLv3 & LICENSE.GPLv2
- Removed LICENSE.GPL

Change-Id: I84a565e2e0caa3b76bf291a7d188a57a4b00e1b0
Reviewed-by: Jani Heikkinen <jani.heikkinen@digia.com>

Allow the implementation of visit to control whether the children should be
processed afterwards or not. This is modelled after the JS AST visitor in
Qml.

Change-Id: I5b1adf5e1aefd8899bf444e993ddfbf2c5c125c9
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

This basically renames QQuickShaderEffectTexture to QSGDefaultLayer and
introduces QSGLayer as interface to be used. QQuickShaderEffectTexture is
generic for the scene graph and has no QtQuick dependencies. The interface
separation allows scene graph backends to customize layers.

Change-Id: I9a7f37addaa4b80a34ff9a1456b0cb9b16d4e9f3
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

This allows a scene graph backend to customize the style rendering

Change-Id: I6048df47ed3705d81140d63a21257f704a0e0a82
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

Added a new node visitor that allows easier traversal of the specialized
node types such as the image or rectangle nodes.

Change-Id: I45a7d3e1513b4a4db9d07998a6bcee9eba34044e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

The basic approach is to have the batched renderer create and bind a
vertex array object if it detects we are using an OpenGL Core profile
context. The VAO is bound for the duration of the QQ2 renderer's
work cycle and unbound at the end so as to not interfere with any
other VAO's a user may wish to use.

All shaders have been copied and ported to be compliant with the
GLSL 150 core specification which is the minimum for a Core profile
context (OpenGL 3.2 Core). We are not using any newer features as
yet so this will work anywhere we can get a Core profile context.

The QSGShaderSourceBuilder class has been extended to resolve any
requests for shaders to the same basefilename with "_core"
appended prior to any file extension. This could be extended in
the future to allow version, or GPU or platform specific shaders.

The QSGShaderSourceBuilder has also been extended to allow it to
insert #define definitions in the prologue of a shader. Any such
definition is inserted:

* After the last #extension directive (if any are found)
* Otherwise after the #version directive (if found)
* Otherwise at the start of the shader source

This is required by the custom particle shaders which make
extensive use of such #defines.

In addition the mechanism used by the distance field glyph cache to
extend the cache with new glyphs has been modified to work (and
work more efficiently) when using a Core profile context.

Rather than using a shader program and a buffer filling quad to
blit the old texture into the new cache texture, we instead use
the technique of framebuffer blitting. The existing fallback
implementation using glTexSubImage2D() is still available if
needed.

The DECLARATIVE_EXAMPLE_MAIN macro has been extended to allow easy
testing of any of the QtDeclarative examples with a core profile
context. Just run the example with

QT_QUICK_CORE_PROFILE=1 ./text

for e.g. The only ones that may not work out of the box are those
that provide GLSL shader source e.g. the customparticles or
shader effect examples. These work fine if the shader source is
adapted to GLSL 150 core.

In the future it may be a good idea to expose some context property
to QML that the user can use to determine what shader source
variation to provide to Qt Quick. Along these lines it would also
be very nice to allow the provision of shader source to
ShaderEffect or CustomParticle from a separate source file just as
we now do within Qt Quick.

Task-number: QTBUG-32050
Change-Id: Ia6e9f06dbb8508af9ae03c6b60fb418b4cc9e41f
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

See the task for the full reasoning behind this patch.

The threaded renderloop has been refactored to have one window per
thread. This is mostly a simplification of the current code path where
for loops over multiple windows are turned into if (window).

The QSGContext has been split into two classes, QSGRenderContext
for which there is one per OpenGLContext.

The rest of the patch is name changes and a couple of cleanups
in the hopes of simplifying this change.

Task-number: QTBUG-33993

Change-Id: I31c81f9694d7da7474a72333169be38de62613c4
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

Change-Id: I3750c47640bf21c3567c5fa1c4667e3e2552942e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

Some OpenGL drivers assume alpha-only images are always tightly packed,
regardless of what is set for GL_UNPACK_ALIGNMENT. We now use
QDistanceField to store glyphs, which aligns scanlines on a 1-byte
boundary, instead of QImage which uses a 4-byte boundary. A previous
workaround uploaded scanlines one at a time, but this is also broken
with some other drivers...

Task-number: QTBUG-30908
Task-number: QTBUG-32861
Change-Id: I46527fb48de1e00116f776427c45baa752c6176d
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

These include guards stem from the olden days before the QSG
prefix and many of them are conflict prone, which can lead
to pretty bisarrer errors for the user.

Change-Id: I0e76c68a588404b6e82be9ecc2e7afa3b9a48e78
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>

The macro was made empty in qtbase/ba3dc5f3b56d1fab6fe37fe7ae08096d7dc68bcb
and is no longer necessary or used.

Discussed-on: http://lists.qt-project.org/pipermail/development/2013-January/009284.html


Change-Id: Ia07e99676e0134fde5e32880edb95e57c779a7ff
Reviewed-by: Laszlo Papp <lpapp@kde.org>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Alan Alpert <aalpert@rim.com>

Change-Id: I6c3bd7bebe3d62d1cfd0fa6334544c9db8398c76
Reviewed-by: Akseli Salovaara <akseli.salovaara@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>

Change copyrights and license headers from Nokia to Digia

Change-Id: Ie7f5d49ed8235d7a7845ab68f99ad1c220e64d5c
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

Since multisampling can require a lot of memory, and might not
be supported on some hardware, turn off multisampling and
implement antialiasing in the vertex shader instead. The
alternative method of antialiasing is implemented for Rectangle,
Image, BorderImage and AnimatedImage, and must be explicitly
enabled by setting the new antialiasing property.

Task-number: QTBUG-26268
Change-Id: I39a93d978658a494bf51e9f0fd02d8414eb8be12
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

The glyphs are not stored in a fixed 64x64px tile anymore.
Glyphs are stored in area equal to <glyph_width> + 10 (margin) x 64px.
Allocation is now done with QSGAreaAllocator.
When glyph recycling is needed, unused glyphs are freed until the new
glyph can fit in the cache.

Change-Id: I179a8f17bfe35468bdb63bca5113ea4d0f06c414
Reviewed-by: Yoann Lopes <yoann.lopes@nokia.com>

Reduce library load time by removing any exports which are not required
by existing clients.

Task-number: QTBUG-24768
Change-Id: Ia5754d6f97bb2ed46e290820a5b092f85a4bc5b0
Reviewed-by: Martin Jones <martin.jones@nokia.com>

To implement a custom distance field glyph node currently it's
necessary to also provide a duplicate implementation of
QSGContext::createDistanceFieldGlyphCache() as the default implemention
references the cache manager created by createGlyphNode().  By isolating
references to the cache manager to just createDistanceFieldGlyph() cache
it becomes possible to just overwrite createGlyphNode() and still use
the default cache.

Change-Id: I7261bdbf247966b55512d2671e2ee85239bcca05
Reviewed-by: Yoann Lopes <yoann.lopes@nokia.com>

Previously we had a different cache instance for each font size, but
they all shared the same textures and positions. Only the glyph metrics
were specific to each font size.
The metrics for each font sizes are now calculated by scaling the metrics
of the distance-field size (54px).

Change-Id: I0d9016990dedd93318893506afb1dba7a5249e2e
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>

Symbols beginning with QDeclarative are already exported
by the quick1 module.

Users can apply the bin/rename-qtdeclarative-symbols.sh
script to modify client code using the previous names of the
renamed symbols.

Task-number: QTBUG-23737
Change-Id: Ifaa482663767634931e8711a8e9bf6e404859e66
Reviewed-by: Martin Jones <martin.jones@nokia.com>

As in the past, to avoid rewriting various autotests that contain
line-number information, an extra blank line has been inserted at the
end of the license text to ensure that this commit does not change the
total number of lines in the license header.

Change-Id: If39bd256b0fa85eba17ea30f8ab87ea27d758908
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>

Use a shared graphics cache to back the distance fields if
it is available.

Change-Id: Id5e6e7a28e38e349d787e66016b2d0faebc791d7
Reviewed-by: Jiang Jiang <jiang.jiang@nokia.com>

Replace Nokia contact email address with Qt Project website.

Change-Id: I6a730abc0c396fb545a48b2d6938abedac2e3f1c
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
Reviewed-by: Alan Alpert <alan.alpert@nokia.com>

Update copyright headers from before 2011, and a couple of new ones that
were merged after the previous change to copyright headers.

Change-Id: Ia76e08e2734afa4ef3f1207dbcda5ff3bc81b366
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>

This was previously done only in the default cache implementation. It
has been moved to the base class.
releaseGlyphs() is called when a glyph is not referenced anymore by any
node.
Added a virtual function referenceGlyphs() that is called everytime glyphs
are being used in a node. This function is called just before
requestGlyphs().

Change-Id: If90f86c328c18ae2a5977847a6adf50b99ea1241
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>

The distance field glyph node now uses preprocess().
The glyph cache is updated at that time, then when all the glyphs are
ready the node's geometry is updated.

addGlyphPositions and addGlyphTextures in QSGDistanceFieldGlyphCache
have been renamed to setGlyphsPosition and setGlyphsTexture to reflect the
fact that they can be used to update existing glyphs. For example when
a glyph has moved to a different texture.
When an existing glyph is updated, all nodes containing that glyph are
invalidated and their geometries are reconstructed with the new values.

Change-Id: I7758313155f48811e6027434e6c9a1c3df5dfab7
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>

This change moves the QtQuick 2 types and C++ API (including
SceneGraph) to a new module (AKA library), QtQuick.

99% of this change is moving files from src/declarative to
src/quick, and from tests/auto/declarative to
tests/auto/qtquick2.

The loading of QtQuick 2 ("import QtQuick 2.0") is now delegated to
a plugin, src/imports/qtquick2, just like it's done for QtQuick 1.

All tools, examples, and tests that use QtQuick C++ API have gotten
"QT += quick" or "QT += quick-private" added to their .pro file.

A few additional internal QtDeclarative classes had to be exported
(via Q_DECLARATIVE_PRIVATE_EXPORT) since they're needed by the
QtQuick 2 implementation.

The old header locations (e.g. QtDeclarative/qquickitem.h) will
still be supported for some time, but will produce compile-time
warnings. (To avoid the QtQuick implementation using the
compatibility headers (since QtDeclarative's includepath comes
first), a few include statements were modified, e.g. from
"#include <qsgnode.h>" to "#include <QtQuick/qsgnode.h>".)

There's a change in qtbase that automatically adds QtQuick to the
module list if QtDeclarative is used. Together with the compatibility
headers, this should help reduce the migration pain for existing
projects.

In theory, simply getting an existing QtDeclarative-based project
to compile and link shouldn't require any changes for now -- but
porting to the new scheme is of course recommended, and will
eventually become mandatory.

Task-number: QTBUG-22889
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Change-Id: Ia52be9373172ba2f37e7623231ecb060316c96a7
Reviewed-by: Kent Hansen <kent.hansen@nokia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@nokia.com>

The distance field glyph cache is now an abstract class part of the
adaptation layer. It can be implemented to define the way the glyphs are
stored in graphics memory on a specific platform. The typical use case
is for having a cross-process glyph cache. To implement a custom glyph
cache, one has to override three pure virtual functions: requestGlyphs(),
storeGlyphs() and releaseGlyphs().

The default implementation works the same way as before the refactoring
(no cross-process cache).

Change-Id: I6e231a119abbffbe36f5f0d690f0b8be0664ff4f
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>

The QSG (SceneGraph) prefix is too generic for
Qt Quick(2)-specific classes.

All the classes and files in the declarative/items
directory have been renamed.

In particular, for classes that are currently public,
the renaming is as follows:

QSGView --> QQuickView
QSGCanvas --> QQuickCanvas
QSGItem --> QQuickItem
QSGPaintedItem --> QQuickPaintedItem

The header files have been renamed accordingly
(e.g. qsgview.h --> qquickview.h).

Change-Id: Iac937fff81db20bb639486a793c3aeb5230b038c
Reviewed-by: Kent Hansen <kent.hansen@nokia.com>

Rename QGuiGLContext -> QOpenGLContext, QGL* -> QOpenGL*, etc.

Change-Id: I08379029d756e28b20ae141ca30ed801626b513d
Reviewed-on: http://codereview.qt.nokia.com/3711


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

Use the general QSGTextNode class as back-end for all text
elements in QML to make all text elements look the same and
use the same text rasterization back-end. This requires a
few rewrites in the text node to support e.g. selections.

Crashes seen with threaded renderer in TextEdit and TextInput on
Mac are also fixed by this.

Reviewed-by: Jiang Jiang
Task-number: QTBUG-18019, QTBUG-20017
Change-Id: I4207faf180c83422e5f8b726741321af395bd724
Reviewed-on: http://codereview.qt.nokia.com/2865


Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>

Change-Id: I13f95b415b28467617c4ca804e706082150d253e
Reviewed-on: http://codereview.qt.nokia.com/2870


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Bjørn Erik Nilsen <bjorn.nilsen@nokia.com>

Based on two texture samples instead of five.
Can be enabled with qmlscene --text-subpixel-antialiasing-lowq

Change-Id: I726f73d812b93aa9ca38ce142d1e97b9a40d200a
Reviewed-on: http://codereview.qt.nokia.com/2861


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Yoann Lopes <yoann.lopes@nokia.com>

The distance field glyph caches are now contained in the QSGContext.

Change-Id: Ifc5d155917314b1cc5905ef86fdad0bbc5635c7d
Reviewed-on: http://codereview.qt.nokia.com/2787


Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

Change-Id: Id2e8ccf6441ce7e7a2bcdd6f0d50745e7d9ba653
Reviewed-on: http://codereview.qt.nokia.com/1750


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Yoann Lopes <yoann.lopes@nokia.com>

Replace old license header with correct one.

Change-Id: I492ddaaa0227b2c8faf11bdcd6e12e7231a54a10
Reviewed-on: http://codereview.qt.nokia.com/1312


Reviewed-by: Jyri Tahtela <jyri.tahtela@nokia.com>