Bug 146105

Summary: Zoom of a complex 3D shape very slow
Product: LibreOffice Reporter: Telesto <telesto>
Component: graphics stackAssignee: Not Assigned <libreoffice-bugs>
Status: NEW ---    
Severity: normal CC: Armin.Le.Grand, buzea.bogdan, l.lunak, rb.henschel, vsfoote
Priority: medium    
Version: 7.0.0.1 rc   
Hardware: All   
OS: All   
Whiteboard:
Crash report or crash signature: Regression By:
Bug Depends on:    
Bug Blocks: 136524    
Attachments: Example file
Example file 2

Description Telesto 2021-12-07 19:13:32 UTC 
Description:
Zoom of a complex 3D shape very slow (Skia Raster and previously GDI)

Steps to Reproduce:
1. Open the attached file
2. Zoom in out (lag) (not rendering each and every zoom frame with CTRL+Scroll wheel would probably improve thinks)
3. Zoom in to 280% and scroll up/down left right (lag)

Actual Results:
Lagging

Expected Results:
Little more speed would be nice


Reproducible: Always


User Profile Reset: No



Additional Info:
Found in
7.4

and in
Version: 7.2.1.0.0+ (x64) / LibreOffice Community
Build ID: 8fdbb8aed1b48734a717d5f98ada566de7204605
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: Skia/Raster; VCL: win
Locale: nl-NL (nl_NL); UI: en-US
Calc: CL

and in
7.0

and in 
4.4.7.2
Comment 1 Telesto 2021-12-07 19:14:13 UTC 
Created attachment 176776 [details]
Example file
Comment 2 Luboš Luňák 2021-12-08 16:52:08 UTC 
Nothing to do with Skia, time spent somewhere in drawinglayer.
Comment 3 V Stuart Foote 2021-12-08 17:36:39 UTC 
(In reply to Telesto from comment #0)
> 1. Open the attached file
> 2. Zoom in out (lag) (not rendering each and every zoom frame with
> CTRL+Scroll wheel would probably improve thinks)

The rendering speed/buffering for smooth zoom & pan aside, lets not screw with the zoom step behavior for the sd canvas. 

We already have residual of bug 45705 to bring keyboard zoom in/out (via UNO) in line with the Zoom bar and <Ctrl>+MouseWheel controls for Draw & Impress--to match consistent behavior of Writer, Calc and Math.

The zoom steps need to be consistent for all zoom modes, by mouse, zoombar, and keyboard. And, no performance improvement to be found there!
Comment 4 Regina Henschel 2021-12-08 18:49:32 UTC 
The problem is, that the object has about 12000 cylinders.
Comment 5 Telesto 2021-12-08 18:55:16 UTC 
Created attachment 176819 [details]
Example file 2

(In reply to Regina Henschel from comment #4)
> The problem is, that the object has about 12000 cylinders.

Another example

Pattern fill and hatch still lovely things to generate perf issues.. with 3D objects or fontwork with extrusion enabled
Comment 6 BogdanB 2022-12-29 06:08:48 UTC 
We need retesting with attachment from comment 5.