On 07/27/2013 03:41 PM, Denys Dmytriyenko wrote:
On Sun, Jul 28, 2013 at 03:18:05AM +1200, Christian Gagneraud wrote:
On 07/27/2013 02:20 PM, Sundareson, Prabindh wrote:
The device approach is useful for adding platform specific hooks for
eglfs via EGLFS_PLATFORM_HOOKS_SOURCES, so it is a good thing. So it is
more of a convenience/cleaner way, than anything related to performance.
I do agree with Dennys about the compiler flags, yocto knows what
are the best flags for the machine/device.
What is nice with the device file approach is the specification for
OpenGL includes, libs, QPA and the EGLFS hooks as well.
Basically I like the fact that all the OpenGL "mess" is sorted out
in one place (when it comes to compilation).
Interesting examples are the Rasberry Pi [1] and Freescale i.mx6 [2].
when considering Qt alone (out of Yocto/OE), I think as a SoC
vendor, it is the best way to make sure your users get the best of
Qt5/OpenGL, and very easily according to [3] (not tested).
When it comes to Yocto, I didn't see any easy way for meta-bsp to
tell meta-qt5 how to configure/build qt5 w/ OpenGL support.
It seems to me that the only way is through the .bbappend, in qtbase.inc:
[...]
# if you want to enable egl/gles2 in your .bbappend, don't forget to
add right dependencies, e.g.
# GL_DEPENDS = "virtual/libgles2 virtual/egl"
# QT_GLFLAGS = "-opengl es2 -eglfs"
GL_DEPENDS ?= "virtual/libgl"
QT_GLFLAGS ?= "-opengl"
[...]
Could/should this be used by the meta-ti layer?
I spent some time recently going through meta-qt5 recently (as well
as the qt4 stuff), I even tried an alternative configure/method, so
far unsuccessfully. My feeling is that meta-qt5 tries to adapt qt5
to OE, I think it should be done the other way around, that's my
very personal view.
I really would like to see a Yocto Qt5 SDK one of these days.
Prabindh, could you tell more about the status of Qt5/OpenGL for TI
SoCs, what about this commit [4]? Is it possible to build within
Yocto Qt5 w/ OpenGL support for AM335x platforms?
Have you seen this thread:
http://thread.gmane.org/gmane.linux.embedded.yocto.meta-ti/2139
No I haven't up to now, thanks for the link.
Regards,
Chris
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