//no instance required
/// <summary>Calculates width and height values for image with a given area params.</summary>
/// <param name="image">
/// the
/// <see cref="iText.Layout.Properties.BackgroundImage"/>
/// width and height of which you want to calculate
/// </param>
/// <param name="areaWidth">width of the area of this images</param>
/// <param name="areaHeight">height of the area of this images</param>
/// <returns>array of two Float values. NOTE that first value defines width, second defines height.</returns>
/// <seealso cref="iText.Layout.Properties.BackgroundSize"/>
public static float[] CalculateBackgroundImageSize(BackgroundImage image, float areaWidth, float areaHeight
)
{
bool isGradient = image.GetLinearGradientBuilder() != null;
BackgroundSize size;
if (!isGradient && image.GetBackgroundSize().IsSpecificSize())
{
size = CalculateBackgroundSizeForArea(image, areaWidth, areaHeight);
}
else
{
size = image.GetBackgroundSize();
}
UnitValue width = size.GetBackgroundWidthSize();
UnitValue height = size.GetBackgroundHeightSize();
float?[] widthAndHeight = new float?[2];
if (width != null && width.GetValue() >= 0)
{
bool needScale = !isGradient && height == null;
CalculateBackgroundWidth(width, areaWidth, needScale, image, widthAndHeight);
}
if (height != null && height.GetValue() >= 0)
{
bool needScale = !isGradient && width == null;
CalculateBackgroundHeight(height, areaHeight, needScale, image, widthAndHeight);
}
SetDefaultSizeIfNull(widthAndHeight, areaWidth, areaHeight, image, isGradient);
return(new float[] { (float)widthAndHeight[0], (float)widthAndHeight[1] });
}
