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https://bugs.launchpad.net/bugs/1275042

Title:
  Wrong colors with Mesa 11.1.2-1 on ubuntu MATE 16.04 PowerPC

Status in Mesa:
  Unknown
Status in mesa package in Ubuntu:
  Triaged

Bug description:
  Hi all,

  I've tried Mesa 9.2.2-1 and 10.0.1 on Debian Sid, Lubuntu 13.10, and
  on Lubuntu 14.04. Unfortunately all have issued false colors in games.
  They appear to be ABGR instead of RGBA, thus blue becomes green, red
  becomes alpha etc.

  This issue affects sdl2 applications either.

  The Mesa version 11.1.2-1 doesn't work either on ubuntu MATE 16.04
  PowerPC.

  Mesa 8.0.5-4 and Mesa 9.1.6 have no color problem.

  The transitional solution is to install the old Mesa 8.0.X with "Force
  Version" with the Synaptic package manager on new distributions.

  In my point of view, the problem is in the source file p_format.h in
  the directory src/gallium/include/pipe/. There is some code for
  translating colors for big-endian machines. The problem is, this code
  is only for the CPU. I mean for LLVMpipe for the CPU. The Radeon
  graphics cards don't need this translating code but IBM pSeries
  machines without graphics cards need this code. This code translates
  the colors in a wrong way for Radeon graphics cards. I removed this
  code and after compiling Mesa again, the colors are displayed
  correctly. I released some unofficial Mesa versions with this patch.

  Downloads: http://www.supertuxkart-amiga.de/amiga/mesalib-
  unofficial.html

  Hardware:

  AmigaOne X1000 (Nemo)
  PA Semi Dual-core PA6T-1682M, 1.8GHz PowerISA™ v2.04+ CPU
  "Xena" 500MHz XMOS XS1-L2 124
  8GB DDR2 SDRAM
  XFX Radeon HD 6870, 1 GB RAM
  OCZ600MXSP 600 Switching power supply
  RTL 8139/8139C/8139C+ network card
  TSSTcorp CDDVDW SH-224BB dvd drive
  ATA ST2000DM001-9YN1 SEAGATE HD
  ATA ESA 3SF1240GB HD

  More information:

  http://en.wikipedia.org/wiki/AmigaOne_X1000
  http://www.supertuxkart-amiga.de/amiga/x1000.html

  Rgds,
  Christian
  ---
  ApportVersion: 2.20-0ubuntu3
  Architecture: powerpc
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: MATE
  DistUpgraded: Fresh install
  DistroCodename: xenial
  DistroRelease: Ubuntu 16.04
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Barts XT [Radeon HD 6870] [1002:6738] 
(prog-if 00 [VGA controller])
     Subsystem: XFX Pine Group Inc. Barts XT [Radeon HD 6870] [1682:3107]
  Package: libgl1-mesa-dri 11.1.2-1ubuntu1
  PackageArchitecture: powerpc
  ProcKernelCmdLine: root=/dev/sdb1 quiet ro splash
  ProcModules: kvm_pr 91899 0 - Live 0x0000000000000000
  Tags:  xenial ubuntu
  Uname: Linux 4.5.0-rc6_A-EON_AmigaONE_X1000_Nemo ppc64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dip lpadmin plugdev sambashare sudo video
  _MarkForUpload: True
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.67-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.3-2ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1

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