It's not really about features already present in OpenGL ES 2 that
might not be present in other OpenGL implementations; for instance,
NPOT textures are not in ES 2, but only available through extensions.
Therefore, change the wording to include optional OpenGL and OpenGL ES
features.
Change-Id: I3822e50789ded10a937e3c5b7b4be9e267265276
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
If the GL version is new enough the extension string won't contain
features that have been standardized. So far we only check for FBOs.
Change-Id: Ib29826f378b394894885717c062872581bd5c9f5
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Angle, for instance, which is now the default on Windows,
does not support the GL_BGRA_EXT format as input for
glTexSubImage2D(). In the case where it's not detected, we
therefore need to flip the bytes in the input.
Change-Id: Ibe78d0223e3c2c39cb1943cdcf67103044d00aa7
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Change copyrights and license headers from Nokia to Digia
Change-Id: If1cc974286d29fd01ec6c19dd4719a67f4c3f00e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
The Khronos group makes the glext.h (Desktop OpenGL) and gl2ext.h
(OpenGL ES2) headers officially available nowadays. Most (all?)
Linux systems ship this by default. On Windows platforms the
glext.h file needs to be downloaded from
http://www.opengl.org/registry/api/glext.h
and placed alongside the system OpenGL header.
Making use of the official header reduces the maintenance
overhead for OpenGL support in Qt by removing the need to copy
and paste definitions into the Qt sources.
As the Khronos-provided headers are standardised and backwards and
forwards compatible we can utilise these for all platforms rather
than just for Windows. This means that all definitions required
by Qt will be present even if the system ships out-dated
equivalents.
Mac OS X needs special handling in that we should always use the
system-provided headers there. This is because Apple controls the
OpenGL driver and the headers that go along with it. As such there
is no possibility that the driver exposes additional functionality
compared with the system-provided OpenGL headers. Apple has also
decided to make different decisions about some OpenGL typedefs
compared to other implementations. For example, Apple typdefs
GLhandleARB to void* whereas other platforms use unsigned int.
The alternative, which is to use the system provided glext.h (or
gl2ext.h) header means that Qt code would need to check for the
availability of such definitions wherever it is not guaranteed
to be provided by core OpenGL/ES just to compile.
The proposed approach means that Qt can compile regardless of
the system's OpenGL extension support. We just need to be
rigourous in runtime checking of support for extensions but
that is already a requirement (and is missing in a few places,
see TODO's added in this commit).
The official Khronos headers are added to Qt as
qopenglext.h - Desktop OpenGL
qopengles2ext.h - OpenGL ES2
They need to be public but not part of QtGui module include, hence
the headers have been modified by adding
#if 0
#pragma qt_no_master_include
#endif
to them.
This has been tested on:
Gentoo Linux with GCC 4.6.3
Windows 7 with MSVC 2010
Mac OSX 10.8 with Apple clang 4.0 (based on LLVM 3.1svn)
QNX with qcc (based on GCC 4.4)
A small change is needed to QtDeclarative when building for OpenGL
ES 2 after applying this commit. See
https://codereview.qt-project.org/#change,31794
Change-Id: I4b3d2b1680baf4c78be9a87b4d8de076d23e8f82
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
The GL_IMG_texture_npot extension only provides partial support for
npot textures in that it allows use of npot textures but it does not
support the GL_REPEAT texture mode (needed for tiling fill modes in the
QQ2 image element).
Adding this new finer-grained feature check allows QQ2 to still use npot
textures where GL_REPEAT is not needed with only the IMG extension
present.
A follow-up commit will make a check for this in qtdeclarative.
Change-Id: Iff3dbdb955fb334d9e32f3abd49e90ff0ed9836c
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
Primary goal, make the front page of the Qt GUI module a bit more
clarifying and avoid downstream references inside the Qt GUI docs.
Change-Id: Icbcfbb64b93963add889bf83711daa9575885c02
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
We don't use the GL short term in the new API.
Change-Id: I73a51f65f5f4216c1763b95dcddf68fe8fc229d1
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Lars Knoll <lars.knoll@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: I311e001373776812699d6efc045b5f742890c689
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
Also add some debugging helpers to make sure applications are correctly
written even on less restrictive platforms.
Change-Id: Ie92e497c32e07b2b83662f7ab5540d8f37777fd0
Reviewed-by: Jørgen Lind <jorgen.lind@nokia.com>
All this API is "new" since 5.0.
Change-Id: I7ba1718a4a24eac00ccc4db1646200e9544ee5a4
Reviewed-on: http://codereview.qt.nokia.com/4131
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
Giuseppe D'Angelo
Samuel Rødal
Sergio Ahumada
Eskil Abrahamsen Blomfeldt
Iikka Eklund
Kim Motoyoshi Kalland
Sean Harmer
Sean Harmer
Gunnar Sletta
Samuel Rødal
Jason McDonald
Friedemann Kleint