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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>
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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>
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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>
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Replace Nokia contact email address with Qt Project website.
Change-Id: I431bbbf76d7c27d8b502f87947675c116994c415
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
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Change-Id: I02f2c620296fcd91d4967d58767ea33fc4e1e7dc
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
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Change-Id: I351a910968ff7f46550af5b3742959cb0cab540d
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
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Change-Id: Ibc989afa4a30dd184d41d1a1cd89f97196e48855
Reviewed-on: http://codereview.qt.nokia.com/3710
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
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Change-Id: I646b8e26d5e7214432a044866764d57cc11b2390
Reviewed-on: http://codereview.qt.nokia.com/3006
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jørgen Lind <jorgen.lind@nokia.com>
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Updated version of LGPL and FDL licenseheaders.
Apply release phase licenseheaders for all source files.
Reviewed-by: Trust Me
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If the SRGB framebuffer extension in GL is available, we can support
gamma correction of text with a gamma of 2.1. On Mac this is
sufficient for gamma correcting subpixel antialiased text. Gray
antialiasing should not be gamma corrected on Mac.
On Windows, the user can potentially set the gamma value to anything
between 1.0 and 2.2 (or something like that). We support anything
that resembles 1.0 closely enough by pushing the text out without
any correction (like before). We also support anything that resembles
2.1 (the gamma hardcoded in GL's SRGB extension) by turning on the
extension before blending the text. In between the two, we'll use
gray antialiasing to avoid differing too much from the raster engine
(which is our reference in this.)
For gray antialiasing on Windows, we use a constant gamma of 2.3 which
has been determined by experimentation. Since this is close enough to
2.1 we do gamma correction with SRGB extension.
The distance limit of 0.2 is determined by some experimentation.
Reviewed-by: Samuel
(cherry picked from commit 79ba7cceca5e4029876ace2121edd25b08ae14ce)
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This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:
http://qt.gitorious.org/qt/pages/GitIntroductionWithQt
If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.
Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12
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