Bug 95406 - glLogicOp (GL_XOR) does not work on AMD/ATI card
Summary: glLogicOp (GL_XOR) does not work on AMD/ATI card
Status: RESOLVED WORKSFORME
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Default DRI bug account
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Reported: 2016-05-15 11:38 UTC by Franz Reiter
Modified: 2016-05-16 08:31 UTC (History)
0 users

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Description Franz Reiter 2016-05-15 11:38:03 UTC 
Linux-driver on Ubuntu 14.04.4/64-bit with card AMD/ATI Richland Radeon HD 8570D
  (AMD Radeon R7 240):

it seems that "glLogicOp (GL_XOR)" does not work:

..
  glLogicOp (GL_XOR);
  glEnable (GL_COLOR_LOGIC_OP);
..
  glPixelZoom (1.f, 1.f);
  glDrawPixels (rb_dx, rb_dy,  // width, height
      // GL_BLUE,  // yellow
      GL_GREEN,    // violet
      // GL_RED,   // cyan
      GL_FLOAT,
      fBuf);                   // data
  glDisable(GL_COLOR_LOGIC_OP);


creates a black background only.

Sourcecode: see function GL_RubberBox_draw in:
https://github.com/gcad3d/gcad3d/blob/master/src/gr/ut_GL.c

The proprietary AMD/ATI-driver and all Nvidia-cards/drivers work ok with this code.

---------------------------------------------------------
CAD-CAM Services Ing. Franz Reiter
email franz.reiter@cadcam.co.at
http://www.cadcam.co.at
http://www.gcad3d.org
---------------------------------------------------------
Comment 1 Vedran Miletić 2016-05-15 11:46:56 UTC 
Ubuntu 14.04 is a bit dated. Is it also broken on latest Mesa git?
Comment 2 Franz Reiter 2016-05-16 08:31:11 UTC 
my problem is solved; after:

sudo apt-get build-dep mesa
- this did install (add !) several packages *drm* *llvm* ..
- now the selection-box (rubber-box - by glLogicOp (GL_XOR)) works ! Thanks.


=======================================================
Grafic card is: [Radeon HD 8570 / R7 240/340 OEM]
OS is Ubuntu 14.04.4 - Linux 3.19.0.59

> dpkg -l | grep mesa
libegl1-mesa-lts-vivid:amd64                          10.5.9-2ubuntu1~trusty2
libgl1-mesa-dev                                       10.1.3-0ubuntu0.6
libgl1-mesa-dri-lts-vivid:amd64                       10.5.9-2ubuntu1~trusty2
libgl1-mesa-glx-lts-vivid:amd64                       10.5.9-2ubuntu1~trusty2
libglapi-mesa-lts-vivid:amd64                         10.5.9-2ubuntu1~trusty2
libgles1-mesa-lts-vivid:amd64                         10.5.9-2ubuntu1~trusty2
libgles2-mesa-lts-vivid:amd64                         10.5.9-2ubuntu1~trusty2
libwayland-egl1-mesa-lts-vivid:amd64                  10.5.9-2ubuntu1~trusty2
mesa-common-dev                                       10.1.3-0ubuntu0.6
mesa-utils                                            8.1.0-2


> ldd /usr/lib/gCAD3D/binLinux64/gCAD3D
libGL.so.1 => /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
lrwxrwxrwx   1 root root     14 Aug 21  2015 libGL.so.1 -> libGL.so.1.2.0
-rw-r--r--   1 root root 594456 Aug 21  2015 libGL.so.1.2.0

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