/// <summary>
/// Measures the specified text string. Parameter bounds contains the bounds of the text.<br/>
/// Measured values are returned in local coordinate space.
/// </summary>
/// <param name="bounds">Contains the bounds of the text when returned.</param>
/// <returns>The horizontal advance of the measured text (i.e. where the next character should be drawn).</returns>
public static float TextBounds(this Nvg nvg, Vector2D <float> pos, string @string, string end, out Rectangle <float> bounds)
{
bounds = default;
Fontstash fons = nvg.fontManager.Fontstash;
State state = nvg.stateStack.CurrentState;
float scale = nvg.fontManager.GetFontScale() * nvg.pixelRatio.DevicePxRatio;
float invscale = 1.0f / scale;
if (state.FontId == Fontstash.INVALID)
{
return(0);
}
fons.SetSize(state.FontSize * scale);
fons.SetSpacing(state.LetterSpacing * scale);
fons.SetBlur(state.FontBlur * scale);
fons.SetAlign((int)state.TextAlign);
fons.SetFont(state.FontId);
float width = fons.TextBounds(pos.X * scale, pos.Y * scale, @string, end, out float[] bs);
if (bs != null)
{
fons.LineBounds(pos.Y * scale, out bs[1], out bs[3]);
bounds = new Rectangle <float>()
{
Origin = new Vector2D <float>(bs[0] * invscale, bs[1] * invscale),
Size = new Vector2D <float>((bs[2] - bs[0]) * invscale, (bs[3] - bs[1]) * invscale)
};
}
return(width * invscale);
}
