/// <summary>
/// Creates a new object that is a copy of the current instance.
/// </summary>
/// <returns>
/// A new object that is a copy of this instance.
/// </returns>
/// <filterpriority>2</filterpriority>
public object Clone()
{
EdgeMetrics em = new EdgeMetrics {
Left = Left, Right = Right, Top = Top, Bottom = Bottom
};
return(em);
}
/// <summary>
/// Equality
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public bool Equals(EdgeMetrics other)
{
if (ReferenceEquals(null, other))
{
return(false);
}
//if (ReferenceEquals(this, other)) return true;
return(other.Left == Left && other.Right == Right && other.Top == Top && other.Bottom == Bottom);
}
/// <summary>
/// Equality
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public bool Equals(EdgeMetrics other)
{
if (ReferenceEquals(null, other)) return false;
//if (ReferenceEquals(this, other)) return true;
return other.Left == Left && other.Right == Right && other.Top == Top && other.Bottom == Bottom;
}
/// <summary>
/// Creates a new object that is a copy of the current instance.
/// </summary>
/// <returns>
/// A new object that is a copy of this instance.
/// </returns>
/// <filterpriority>2</filterpriority>
public object Clone()
{
EdgeMetrics em = new EdgeMetrics {Left = Left, Right = Right, Top = Top, Bottom = Bottom};
return em;
}
// ReSharper restore UnassignedField.Global
#endif
/// <summary>
/// Evaluates the 9-patch metadata from the actual texture
/// </summary>
/// <param name="texture"></param>
/// <returns></returns>
public static EdgeMetrics EvaluatePatch9Border(Texture texture)
{
if (null == texture)
{
// no texture found
return new EdgeMetrics();
}
Texture2D texture2D = texture as Texture2D;
if (null == texture2D)
{
// not a Texture2D
return new EdgeMetrics();
}
int w = texture.width;
int h = texture.height;
if (w <= 1)
throw new Exception("Not a valid texture width");
if (h <= 1)
throw new Exception("Not a valid texture height");
//RectOffset output = new RectOffset();
int? left = null;
int? right = null;
int? top = null;
int? bottom = null;
try
{
// sanity check
Color pixel = texture2D.GetPixel(0, h - 1);
if (pixel.a > 0)
{
throw new Exception("When using 9-patch, the top-left pixel needs to be transparent");
}
// read 1st row from left
for (int i = 0; i < w; i++)
{
pixel = texture2D.GetPixel(i, h - 1);
if (pixel.a > 0)
{
left = i + 1;
break;
}
}
if (null == left)
throw new Exception("9-patch: Couldn't find the non transparent pixel in the first row (left)");
// read 1st row from right
for (int i = w - 1; i >= 0; i--)
{
pixel = texture2D.GetPixel(i, h - 1);
if (pixel.a > 0)
{
right = w - i;// + 1;
break;
}
}
if (null == right)
throw new Exception("9-patch: Couldn't find the non transparent pixel in the first row (right)");
// read 1st column from top
for (int i = 0; i < h; i++)
{
pixel = texture2D.GetPixel(0, h - i);
if (pixel.a > 0)
{
top = i + 1;
break;
}
}
if (null == top)
throw new Exception("9-patch: Couldn't find the non transparent pixel in the first column (top)");
// read 1st column from bottom
for (int i = 0; i < h; i++)
{
pixel = texture2D.GetPixel(0, i);
if (pixel.a > 0)
{
bottom = i + 1;
break;
}
}
if (null == bottom)
throw new Exception("9-patch: Couldn't find the non transparent pixel in the first column (bottom)");
}
catch (UnityException ex)
{
throw new Exception("Couldn't read the texture data. Perhaps it is not set as readable? (see Texture importer settings)", ex);
}
EdgeMetrics output = new EdgeMetrics((float)left, (float)right, (float)top, (float)bottom);
#if DEBUG
if (DebugMode)
{
Debug.Log("9-patch: " + output);
}
#endif
return output;
}
