Bug 134242 - Dragging an image slow in GDI mode (part 2)
Summary: Dragging an image slow in GDI mode (part 2)
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Draw (show other bugs)
(earliest affected)
Hardware: All All
: medium normal
Assignee: Not Assigned
Keywords: bibisected, bisected, perf, regression
Depends on:
Blocks: Image-Caching
  Show dependency treegraph
Reported: 2020-06-22 19:32 UTC by Telesto
Modified: 2022-09-16 07:11 UTC (History)
4 users (show)

See Also:
Crash report or crash signature:

Bibisect log (2.78 KB, text/plain)
2020-06-22 19:33 UTC, Telesto

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Description Telesto 2020-06-22 19:32:26 UTC
Dragging an image slow in GDI mode (part 2)

Steps to Reproduce:
1. Open attachment 162322 [details]
2. Drag the image around

Actual Results:

Expected Results:

Reproducible: Always

User Profile Reset: No

Additional Info:
Version: (x64)
Build ID: 43c60ce1ac7629a1462e927e6ff937469f58f743
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: default; VCL: win
Locale: nl-NL (nl_NL); UI: en-US
Calc: CL
Comment 1 Telesto 2020-06-22 19:33:47 UTC
Created attachment 162324 [details]
Bibisect log

Bisected to
author	Mike Kaganski <mike.kaganski@collabora.com>	2020-05-28 20:13:50 +0200
committer	Mike Kaganski <mike.kaganski@collabora.com>	2020-05-29 10:31:40 +0200
commit c644b2b4abe3051c0e0fc91674154c796fd326f6 (patch)
tree 391c0d15daa02bae90325a2d44b9a4cbbba01756
parent f510bdfa98014ca0ae596dcd0dfd487cfc90f3eb (diff)
Use buffer with alpha in VclProcessor2D::RenderUnifiedTransparencePrimitive2D
This allows UnifiedTransparencePrimitive2D to produce truly transparent image,
usable later in the stack - specifically by glow and soft edge effect.

Comment 2 Buovjaga 2020-11-09 06:15:02 UTC

Adding Cc: to Mike Kaganski

Arch Linux 64-bit
Build ID: c9b320c32aceab7e22d381b688e7b44030e01c2d
CPU threads: 8; OS: Linux 5.9; UI render: default; VCL: kf5
Locale: fi-FI (fi_FI.UTF-8); UI: en-US
Calc: threaded
Built on 8 November 2020

Version: (x64)
Build ID: b61bf7c7cfcf97a5ade6d130873af146670bc2ee
CPU threads: 4; OS: Windows 10.0 Build 19041; UI render: default; VCL: win
Locale: fi-FI (fi_FI); UI: en-US
Calc: threaded
Comment 3 Julien Nabet 2022-09-15 19:38:18 UTC
On pc Debian x86-64 with master sources updated today or with LO Debian package + kf5 rendering, I don't reproduce slowliness.

Could someone give a new try with recent LO version? Knowing that if 7.3.6 is slow, 7.4.1 should be tested since 7.3 branch is almost EOL.
Comment 4 Buovjaga 2022-09-16 07:11:31 UTC
I compared with Windows bibisect repo 7.1 and the problem is indeed fixed (also on Linux 7.4)!

Version: (x64) / LibreOffice Community
Build ID: 922b79a0f5a9151a6870ba395abcac5b54055275
CPU threads: 2; OS: Windows 10.0 Build 19044; UI render: default; VCL: win
Locale: fi-FI (fi_FI); UI: en-US
Calc: threaded Jumbo