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Bug 3360

Summary: Raspberry Pi 2 slow hardware rendering with SDL_RenderDrawPoint
Product: SDL Reporter: Joseph Paul <joseph.paul1>
Component: renderAssignee: Sam Lantinga <slouken>
Status: RESOLVED WONTFIX QA Contact: Sam Lantinga <slouken>
Severity: major    
Priority: P2    
Version: 2.0.4   
Hardware: ARM   
OS: Linux   
Attachments: Test case - Demonstration program

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?