Libgdx problems frame rate (FPS) - libgdx

Question

I am having problems with the frame rate in libgdx, alguin could enlighten me if I'm doing something wrong, because I do not think that is normal, the problem in question is I load a tilemap and simple and if put the highest resolution of 320 x 320, 800 x 600 say this drops to 12 fps or so, I hope to explain well PUE groin is not the native language thanks.
public class MyGdxGame extends ApplicationAdapter {
SpriteBatch batch;
Texture img;
private OrthogonalTiledMapRenderer bachTileMapRender;
private OrthographicCamera camera;
private TiledMap map;
private int[] background = new int[] {0}, foreground = new int[] {1};
#Override
public void create () {
batch = new SpriteBatch();
img = new Texture("badlogic.jpg");
map = new TmxMapLoader().load("maps/untitled.tmx");
bachTileMapRender = new OrthogonalTiledMapRenderer(map, 1/32f);//Asignar mapa
camera = new OrthographicCamera(Gdx.graphics.getWidth(),Gdx.graphics.getHeight());
camera.setToOrtho(false, 32, 32); //Virtual dimensiones
}
#Override
public void render () {
Gdx.gl.glClearColor(1, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
//batch.begin();
//batch.draw(img, 0, 0);
//batch.end();
camera.update();
bachTileMapRender.setView(camera);
bachTileMapRender.render(background);
System.out.println("fps:"+Gdx.graphics.getFramesPerSecond());
}
}
320 x 320 the frame rate is about 60 but climbed the window or use the 800 x 600 drops rapidly
public class DesktopLauncher {
public static void main (String[] arg) {
LwjglApplicationConfiguration config = new LwjglApplicationConfiguration();
config.width = 320;
config.height = 320;
new LwjglApplication(new MyGdxGame(), config);
}
}
P.D: it's worth my computer is a dual core 3000, in debian linux
untitled.tmx
<?xml version="1.0" encoding="UTF-8"?>
<map version="1.0" orientation="orthogonal" width="32" height="32" tilewidth="32" tileheight="32">
<tileset firstgid="1" name="prueba" tilewidth="32" tileheight="32">
<image source="title.png" width="384" height="128"/>
</tileset>
<layer name="Capa de Patrones 1" width="32" height="32">
<data encoding="base64" compression="zlib">
eJztwwEJAAAMBKHr8f17rsdQcNVUVVXV1w8ar2wB
</data>
</layer>
</map>

Answer 1

What if you do this?
//Swap these lines
map = new TmxMapLoader().load("maps/untitled.tmx"); //first load map
bachTileMapRender = new OrthogonalTiledMapRenderer(map); //then use map
camera.setToOrtho(false, 800, 600); //X, Y, Z using the aspect ratio you want.
//Gfx config
config.width = 800;
config.height = 600;
Also, how many tiles are you rendering?

Answer 2

it is possible, that the problem is the TextureFilter.
If the Texels (Pixel of a Texture) do not matchthe pixels they use on screen, they need to be recalculated.
For example: You have a Texture of 16*16 pixel, which should then use 20*20px on screen.
The TextureFilter then defines HOW to calculated the pixel on screen.
There are 2 important TextureFilters:
- Nearest: Fetches the nearest Texel
- Linear: Fetches the 4 nearest Texels
You can see, that the linear filter costs much more performance.
So you should try using Nearest, which may does not look as good...
You may notice, that you can set 2 TextureFilters:
- Magnification: If the Texture is smaller then the place it takes on screen, this filter is used
- Minification: If the Texture is bigger then the place it takes on screen, this filter is used.
You can als use MipMapping, which gives you the possibility to have different resolutions of the same Texture, and the best matching one is used.
I would recommend to read this: Know Your Texture Filters!