I develop and design assets (background, buttons,... etc) of my game, but when I design any asset I don't know which screen size do I design?. Many screen sizes different in Android devices or iOS devices. So, if I start design with largest screen, other devices screen's dimensions will be not good and the assets will be too heavy on old devices, and vice if I start design with small screen, other devices screen will be low resolution (if I used for example StrecthViewport).
for example:
stage = new Stage(new StretchViewport(480, 800));
this line on Galaxy note 3 (1080 x 1920) is low resolution
Is there standard designing for the game assets?
Anyone can help me ?
Well there are many ways to achieve your goal. It depends a lot on the game you create so I can give you only a brief overview what works for me:
Create your assets bigger than the biggest screen you support. F.e. you support 2560x1600 then go with something like 3200x2000.
Create a TextureAtlas for each TEXTURE_SIZE you support. Smartphones have a MAX_TEXTURE_SIZE you can load into the memory. Its usually 1024x1024, 2048x2048, 4096x4096 (Newer phones and desktop graphic cards might even support even more like 8192x8192 or bigger) I create then 3 TextureAtlas: 4096 with 1:1 scaling, 2048 scaled bei 50%, 1024 scaled by 25%.
On the devices read the MAX_TEXTURE_SIZE, this snippet can do that.
public final static int maxTextureSize() {
/**
* See http://lwjgl.org/forum/index.php?topic=1314.0;wap2
*/
IntBuffer max = BufferUtils.newIntBuffer(16);
max.clear();
Gdx.gl.glGetIntegerv(GL20.GL_MAX_TEXTURE_SIZE, max);
return max.get(0);
}
Then load the TextureAtlas based on the support MAX_TEXTURE_SIZE.
You can even go further. Just some ideas:
you can calculate the perfect Texel size for the current device and repack an TextureAtlas having 1:1 screen pixel fitting asset pixel. Then load from that atlas.
Some devices may accept an 4096 texture size but their screen is very small so the 2048 version might work aswell, then load the smaller one.