Bug 332389

Summary:	[openGL] [2.8.x] Background transparency checker is broken
Product:	[Applications] krita	Reporter:	David REVOY <info>
Component:	General	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED FIXED
Severity:	grave	CC:	ghevan, halla
Priority:	NOR
Version:	2.8.0
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:	http://commits.kde.org/calligra/da012e477d832dd0bd00fea10c970de05ca1f386	Version Fixed In:
Sentry Crash Report:

Description David REVOY 2014-03-21 06:20:08 UTC

Hi, the background transparency checker ( 100% alpha representation on canvas ) is broken using any OpenGL options. It works fine with CPU. The checker is replaced by a flat white or black background.

To reproduce :
============
_( note : I guess it affects mostly Nvidia driver )_
1. Open any document
2. Turn on OpenGL
2. Erase all the layer to get a transparent document

Result :
======
Background checker decoration transparency are replaced to a flat, uniform color.

Comment 1 Halla Rempt 2014-03-22 10:43:37 UTC

Git commit bc8ca01a2d1f3cb46ffc6e0952a34c707b544dc3 by Boudewijn Rempt.
Committed on 22/03/2014 at 10:34.
Pushed by rempt into branch 'calligra/2.8'.

Revert "Cache the uniform locations for the display and checker shaders"

This reverts commit 8b3a29d36c010a0e6aa2a139012c0671bc88edb6.

M  +8    -29   krita/ui/opengl/kis_opengl_canvas2.cpp

http://commits.kde.org/calligra/bc8ca01a2d1f3cb46ffc6e0952a34c707b544dc3

Comment 2 Halla Rempt 2014-03-22 10:44:15 UTC

Git commit da012e477d832dd0bd00fea10c970de05ca1f386 by Boudewijn Rempt.
Committed on 22/03/2014 at 10:43.
Pushed by rempt into branch 'master'.

Revert "Cache the uniform locations for the display and checker shaders"

This reverts commit 2eb875ee557c89f2bc910deede33401c630d1176.

M  +8    -29   krita/ui/opengl/kis_opengl_canvas2.cpp

http://commits.kde.org/calligra/da012e477d832dd0bd00fea10c970de05ca1f386

Comment 3 David REVOY 2014-03-22 14:36:32 UTC

Hey,  I updated my calligra/2.8, and I still get the same issue even after this revert ( I checked with git log , and made also a clean install on the top , removing 'build' and 'inst' folder ).
Do I did something wrong ? How to check if it's not a local-install-only issue ?

Comment 4 Halla Rempt 2014-03-22 15:35:07 UTC

Argh... that was the wrong commit to revert.

Comment 5 vanyossi 2014-03-25 01:32:27 UTC

Is this fixed now? I get normal checkerboard with OpenGL Nvidia.
master e729d6e4f868e0

Comment 6 David REVOY 2014-03-25 10:08:10 UTC

Hey thanks for the reminder Vanyossi, 
Yes, I built the new 2.8.1 tagged yesterday this morning, and don't have the issue anymore. 
Thanks !