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Bug 3360 - Raspberry Pi 2 slow hardware rendering with SDL_RenderDrawPoint
Summary: Raspberry Pi 2 slow hardware rendering with SDL_RenderDrawPoint
Status: RESOLVED WONTFIX
Alias: None
Product: SDL
Classification: Unclassified
Component: render (show other bugs)
Version: 2.0.4
Hardware: ARM Linux
: P2 major
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-06-12 17:35 UTC by Joseph Paul
Modified: 2017-08-12 02:15 UTC (History)
0 users

See Also:

Attachments
Test case - Demonstration program (12.04 KB, application/zip)
2016-06-12 17:41 UTC, Joseph Paul 		Details
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Description Joseph Paul 2016-06-12 17:35:11 UTC 
Hello,
The SDL_RenderDrawPoint() function seems to be abnormally slow on Raspberry Pi 2 when rendering is accelerated.

I have written a small demonstration program to show that the slowness occurs only on Raspberry Pi, not on i686 and x86_64 platforms.

https://bitbucket.org/josephpaul0/drawpoints

Is it an OpenGL issue on this platform ?
Comment 1 Joseph Paul 2016-06-12 17:41:59 UTC 
Created attachment 2492 [details]
Test case - Demonstration program
Comment 2 Sam Lantinga 2017-08-12 02:15:01 UTC 
Yes, it's very likely an unoptimized code path in the OpenGL renderer on that platform. I know they're constantly working on it, so it may be improved - check with the Pi developers?