Libgdx save SpriteBatch in a texture

问题

I would like to know if it possible to save a spriteBatch in a texture.

 SpriteBatch batch = new SpriteBatch();

After drawing a few thing inside the batch, I would like to save all thing that contains the SpriteBatch in One texture (something like a screenshot).

I have no idea to how to do it, I searched on the web and on the libgdx doc but didn't found.

Thanks you

回答1:

You can render to a FrameBufferObject (FBO). See https://github.com/mattdesl/lwjgl-basics/wiki/FrameBufferObjects

An FBO will work if you are okay with making the decision to render to a texture in advance. One side-effect is that the image is not rendered to the screen, but only to the texture. (Its easy enough to render the texture to the screen afterwards, of course).

As the other answer suggested, you can scrape the bytes off the screen buffer, and make a Texture from the resulting Pixmap (you do not need to go all the way to the filesystem). See https://code.google.com/p/libgdx-users/wiki/Screenshots (just use the getScreenshot method to get a Pixmap of the bytes).

回答2:

Use the conversion to texture like this:

final Pixmap pmap = new Pixmap(bytes, 0, bytes.length);
try{
    Gdx.app.postRunnable(new Runnable(){
        public void run(){
        texture=new Texture(pmap);
        }
    });
}catch(Exception e){
    e.printStackTrace();
}

来源：https://stackoverflow.com/questions/20731463/libgdx-save-spritebatch-in-a-texture