fps problem

Android Processing

elendilch

in Android Processing • 2 years ago

Hi everyone!

I'm trying to code a game for android with processing.

When I start the game I got a only about 45 fps (default max fps is 60).
When I put the game in the background by pressing "home" on the phone (the little house on the htc phone),
and then make it active again, i 've got constantly about 60 fps.

I'm using the A3D renderer (heard it's the same as OPENGL and P3D on android).

Has anybody an idea why? How can I have 60 fps without this trick?

Greetings

ElendilCH

Replies(16)

andres

Re: fps problem

2 years ago

sounds quite puzzling... maybe if you set the framerate of your app explicitly to 60 in the setup() function (calling frameRate(60)), things work better?

elendilch

Re: fps problem

2 years ago

I've already tried this, without success (when you don't use frameRate, processing sets frameRate(60) as default)
It might be a bug with the renderer on android or something like that.

How can I put the app in the background, and make it active with a function?

edit:

Maybe it needs a certain permission (I haven't added any permissions) ?

andres

Re: fps problem

2 years ago

Does this happen with any sketch that uses A3D? Or only with your game app?

David Wil..

Re: fps problem

2 years ago

I've got the same behaviour,

I just loaded up an old image-heavy test sketch that I had written off because it only ran at 17fps, On the HTC Desire (Froyo) I get around 17fps. when I hit the home key, then press and hold the home key to bring the sketch back to the foreground I get around 40fps. and on HTC Sensation (Gingerbread) I get a similar result boosting from 40fps to around 60fps.

Having said that, to check if the frameRate() function was affecting it, I ran the code below and it still runs at 60fps on the Sensation so probably it would run even faster if the framecap could be removed.

void setup() {

size(480, 800 , A3D);

frameRate(1000);

}

void draw() {

background(1);

fill(255);

text(frameRate, 50, 50);

}

Hope this helps, if you want me to test some code and post specific results I'm more than happy to.

Dave.

David Wil..

Re: Re: fps problem

2 years ago

actually, I get no more than 60fps in desktop mode with OPENGL and the same code:

import processing.opengl.*;

void setup() {

size(800, 480, OPENGL);

frameRate(1000);

}

void draw() {

background(1);

fill(255);

text(frameRate, 50, 50);

}

rbrauer

Re: fps problem

2 years ago

Your graphics card might automatically limit the framerate on OpenGL based sketches. See this post:
http://forum.processing.org/topic/getting-started-with-glgraphics#25080000000967065
Thats PC of course. I don't know about the phone behavior.

David Wil..

Re: Re: fps problem

2 years ago

Yep, that's sorted it for desktop, now running at 1800 fps.

I'd be really interested to know what's happening with A3D though.

andres

Re: fps problem

2 years ago

I tested on a N1 with Froyo, and I didn't see any change in fps before and after putting the sketch in the background. I will check with other devices later. Just to make sure I getting your report right: you observe the change in fps even with the simple A3D test sketch that just prints the fps on the screen?

David Wil..

Re: Re: fps problem

2 years ago

Hi Andres,

Sorry, I see how I've misled - the simple sketch above won't recreate the app switching behaviour that elendilch posted about, I was just using that to see if I could get the A3D renderer above 60fps (which I can't). The sketch of mine that causes it to happen is quite a sprawling mess if I'm honest, it wouldn't make a good example. I'll strip it back to the bare minimum that causes it to happen and post the code. It was basically a handful of image arrays across a few classes and also couple of Threads.

I can do this on Monday, perhaps elendilch can post his code too.

elendilch

Re: fps problem

2 years ago

I've got interesting news:

I'm testing my game with my HTC Desire HD.
Yesterday, I tested it on a Samsung Galaxy S 2 (the phone of a friend).
On the Samsung, the problem doesn't exist.

BTW pressing the locking the phone (by pressing the power button) boosts the fps, too.

I think the problem perhaps has something to do with the onResume() or onCreate(), onStop() functions or so.

elendilch

Re: fps problem

2 years ago

I somehow solved this issue (even though I don't know why).
I implemented a menu screen (with some buttons, "resume", "save", etc.), by making a game loop an a menu loop.
After starting the game, the framerate was low, however when I opened the menu and resumed, the framrate went to 60.
So I set the boolean for the menu to true, so you start the game in the menu instead of directly in the gameloop. If I enter the gameloop by pressing my "resume" button, the fps is 60.

Perhaps, by starting in the menu, there is enough time to load the images into the memory. =)

andres

Re: fps problem

2 years ago

Hi, glad to know you found a workaround. I'm unable to help much at this point because I've been unable to reproduce this issue on my own devices so far. However, there will be some core refactoring going on in P3D in the coming days, so maybe this error will just fix itself :-)

elendilch

Re: fps problem

2 years ago

ok cool
Maybe it wasn't a problem of the renderer or processing or android, but rather a simple coding issue.
My program's got some lines now. ;)

David Wil..

Re: fps problem

2 years ago

Andres,

I took a quick video to demonstrates the problem in OpenGL/A3D mode, code below too:

http://www.youtube.com/watch?v=k9pmA2SKRAM

This is on the HTC Desire running CM7, also checked on an HTC Sensation, running Gingerbread similar results with a starting fps of about 48, jumping to about 70 when you switch in and out.

Hope this helps, also added "issue 824", let me know if you need anything else.

Cheers

Dave

void setup() {

orientation(LANDSCAPE);

calculateStripeVerts();

initColours();

frameRate(4000);

}

void draw() {

bg();

fill(#FFFFFF);

textSize(80);

text(frameRate, 0, height-10);

}

color backgroundBlue;

void bg() {

drawStripes();

}

color stripesBlue;

void drawStripes() {

fill(stripesBlue);

noStroke();

beginShape(TRIANGLES);