2014 reduced performance with back image

TeeChart VCL for Borland/CodeGear/Embarcadero RAD Studio, Delphi and C++ Builder.
Post Reply
johnnix
Advanced
Posts: 192
Joined: Tue Jul 10, 2007 12:00 am

2014 reduced performance with back image

Post by johnnix » Wed Apr 16, 2014 9:01 pm

Hello,

I am using the latest 2014 32 bit VCL with Delphi XE (Windows 7 64 bit) and I noticed that with GDI+ when a back image is defined, the chart slowly redraws (e.g. pan and zoom are slow). If I use the GDI canvas then performance is ok. Does anyone noticed this behavior? Is there a work around? I did try setting back image draw quality to low but this does not help.

Kindest regards

johnnix
Newbie
Newbie
Posts: 37
Joined: Thu Nov 28, 2013 12:00 am

Re: 2014 reduced performance with back image

Post by johnnix » Thu Apr 17, 2014 9:25 am

Ok, here is what I found by mistake :) After adding a filter to the back image performance looks normal. Attached is a sample project (also notice that the unfiltered image is not displayed correctly)
Attachments
Test.zip
(136.58 KiB) Downloaded 98 times

Narcís
Site Admin
Site Admin
Posts: 14730
Joined: Mon Jun 09, 2003 4:00 am
Location: Banyoles, Catalonia
Contact:

Re: 2014 reduced performance with back image

Post by Narcís » Thu Apr 17, 2014 12:23 pm

Hello,

Thanks for the example project.

I could reproduce both problems here using the latest binary version but they are solves with our current sources:
JohnnixBackImage.jpg
JohnnixBackImage.jpg (80.09 KiB) Viewed 1455 times
I can send you a test version so that you can test if it solves the problem at your end.
Best Regards,
Narcís Calvet / Development & Support
Steema Software
Avinguda Montilivi 33, 17003 Girona, Catalonia
Tel: 34 972 218 797
http://www.steema.com
Image Image Image Image Image Image
Instructions - How to post in this forum

johnnix
Newbie
Newbie
Posts: 37
Joined: Thu Nov 28, 2013 12:00 am

Re: 2014 reduced performance with back image

Post by johnnix » Thu Apr 17, 2014 1:35 pm

Hello Narcis,

I can confirm that the test version solves the issue!!! Thank you very much for your prompt reply and support :)

Kindest regards

Narcís
Site Admin
Site Admin
Posts: 14730
Joined: Mon Jun 09, 2003 4:00 am
Location: Banyoles, Catalonia
Contact:

Re: 2014 reduced performance with back image

Post by Narcís » Thu Apr 17, 2014 1:37 pm

Hi johnnix,

You're very welcome! I'm glad to hear that.
Best Regards,
Narcís Calvet / Development & Support
Steema Software
Avinguda Montilivi 33, 17003 Girona, Catalonia
Tel: 34 972 218 797
http://www.steema.com
Image Image Image Image Image Image
Instructions - How to post in this forum

Post Reply