Add bugfix: OpenGLRenderer on Linux renders CEGUI samples upside-down

[Lauri Ojansivu]

cegui is affected by this bug:
https://bitbucket.org/cegui/cegui/issues/1063/openglrenderer-on-linux-renders-cegui

Fix is in repository, please backport or upgrade.

This affects all that have older than version 0.8.5 of cegui.

I'm running Linux Mint 18 that based on Ubuntu 16.04.

cegui packages are from Ubuntu, version 0.8.4+dfsg-4ubuntu1

[Lauri Ojansivu (xet7)]

I'm part of development team of game http://www.secretchronicles.de

Attached is image that shows this bug in our game on Linux Mint 17.3 that is based on Ubuntu 14.04.

[Lauri Ojansivu (xet7)]

Attached is image that shows how this bug does not happen on Lubuntu 16.10 that is based on Ubuntu 16.10. Lubuntu is installed from daily iso snapshot 2016-07-31.

[Lauri Ojansivu (xet7)]

Additional info:

1) The release of Ubuntu you are using:

Affected, Linux Mint 18 64bit:
Description: Linux Mint 18 Sarah
Release: 18

Not affected, Lubuntu 16.10 64bit:
Description: Ubuntu Yakkety Yak (development branch)
Release:16.10

2) The version of the package you are using:

Affected, Linux Mint 18 64bit:
libcegui-mk2-dev:
  Installed: 0.8.4+dfsg-4ubuntu1
  Candidate: 0.8.4+dfsg-4ubuntu1
  Version table:
 *** 0.8.4+dfsg-4ubuntu1 500
        500 http://ubuntu.trumpetti.atm.tut.fi/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

Not affected, Lubuntu 16.10 64bit:
libcegui-mk2-dev:
  Installed: 0.8.7-1.1ubuntu1
  Candidate: 0.8.7-1.1ubuntu1
  Version table:
 *** 0.8.7-1.1ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu yakkety/universe amd64 Packages
        100 /var/lib/dpkg/status

3) What you expected to happen:

Menu using CEGUI displays correctly.

4) What happened instead:

Menu using CEGUI is shown as too small and upside down.

[Lauri Ojansivu (xet7)]

I'm using this laptop with 8GB RAM:
Lenovo Thinkpad Edge 0301DFG

It has Intel graphics:
VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 12)

[Olek Wojnar (olekw)]

Yakkety now has version 0.8.7. Is anyone still seeing this bug on that version?

[Lauri Ojansivu (xet7)]

There is no bug on Yakkety when I tested.

There is bug on older Ubuntu when I tested, because of older cegui.

[Olek Wojnar (olekw)]

Ok, I'll see if we can backport the new version to Xenial. Xenial is an LTS so it needs to have a properly-functioning package.

[Olek Wojnar (olekw)]

I believe that this bug is no longer present in any current version of Ubuntu. Therefore, closing.