https://bugs.freedesktop.org/show_bug.cgi?id=95406
Bug ID: 95406
Summary: glLogicOp (GL_XOR) does not work on AMD/ATI card
Product: DRI
Version: XOrg git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Radeon
Assignee: dri-devel at lists.freedesktop.org
Reporter: franz.reiter at cadcam.co.at
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 at cadcam.co.at
http://www.cadcam.co.at
http://www.gcad3d.org
---------------------------------------------------------
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