libGDX：可从Image绘制的图像不能更改其颜色

Question

When I get Drawable from Image from one white pixel (1×1) Texture , its work fine, but I can't change its color. Why?

public static Drawable getDrawable(Texture texture, Color color) {
    Image image = new Image(texture);
    image.setColor(color);
    return image.getDrawable();
}

When I call it:

// can't change color!! ==> still white (default)
getDrawable(pixel, new Color(0, 1f, 0, 0.5f));

Anyone Can advice me :).

Answer 1

The only Drawable types that support having their own color are SpriteDrawable and NinePatchDrawable, and that is because they wrap Sprites and NinePatches, which both have color parameters.

public static Drawable getTintedDrawable(Texture texture, Color color) {
    Sprite sprite = new Sprite(texture);
    sprite.setColor(color);
    return new SpriteDrawable(sprite);
}

If you have an existing TextureRegionDrawable or NinePatchDrawable, you can call tint() on it to generate a new Drawable instance with the color you want.