public static void NineCrop(this Texture2D source, int gutter, TextureFormat format = TextureFormat.RGBA32)
{
if (source.width != source.height)
{
throw new Exception("Failed to nine crop image, source image width and height must be equal.");
}
int realSize = source.width;
int realOffset = source.width - 1;
int canvasWidth = source.width * 3;
int canvasHeight = source.width * 3;
Color[] canvasPixels = source.GetPixels(0, 0, realSize, realSize);
Texture2D canvasTexture = new Texture2D(canvasWidth, canvasHeight, format, false);
canvasTexture.SetPixels((realOffset * 0), (realOffset * 0), realSize, realSize, canvasPixels);
canvasTexture.SetPixels((realOffset * 0), (realOffset * 1), realSize, realSize, canvasPixels);
canvasTexture.SetPixels((realOffset * 0), (realOffset * 2), realSize, realSize, canvasPixels);
canvasTexture.SetPixels((realOffset * 1), (realOffset * 0), realSize, realSize, canvasPixels);
canvasTexture.SetPixels((realOffset * 1), (realOffset * 1), realSize, realSize, canvasPixels);
canvasTexture.SetPixels((realOffset * 1), (realOffset * 2), realSize, realSize, canvasPixels);
canvasTexture.SetPixels((realOffset * 2), (realOffset * 0), realSize, realSize, canvasPixels);
canvasTexture.SetPixels((realOffset * 2), (realOffset * 1), realSize, realSize, canvasPixels);
canvasTexture.SetPixels((realOffset * 2), (realOffset * 2), realSize, realSize, canvasPixels);
canvasTexture.Apply();
int cropSize = realSize * 2;
int cropOffset = (canvasWidth - cropSize) / 2;
Color[] centerPixels = canvasTexture.GetPixels(cropOffset, cropOffset, cropSize, cropSize);
Texture2D centerTexture = new Texture2D(cropSize, cropSize, format, false);
centerTexture.SetPixels(centerPixels);
centerTexture.Apply();
if (gutter > 0)
{
int gutterSize = realSize - (gutter * 2);
int gutterOffset = (gutter - 1);
centerTexture.Scale(gutterSize, gutterSize);
Color[] gutterPixels = centerTexture.GetPixels(0, 0, gutterSize, gutterSize);
var gutterTexture = new Texture2D(realSize, realSize, format, false);
gutterTexture.Clear(Color.green);
gutterTexture.SetPixels(gutterOffset, gutterOffset, gutterSize, gutterSize, gutterPixels);
gutterTexture.Apply();
source.Resize(realSize, realSize);
source.SetPixels(gutterTexture.GetPixels());
source.Apply();
}
else
{
centerTexture.Scale(realSize, realSize);
source.Resize(realSize, realSize);
source.SetPixels(centerTexture.GetPixels());
source.Apply();
}
}
public static Texture2D Extrude(this Texture2D source, int padding, bool bilinearScaling = true, TextureExtrude extrudeColor = TextureExtrude.Default)
{
if (source == null)
{
return(null);
}
int ratio = padding * 2;
int width = source.width - ratio;
int height = source.height - ratio;
Vector2 tileSize = new Vector2(width, height);
Vector2 borderSize = new Vector2(padding, padding);
source.Scale(width, height, bilinearScaling);
return(source.Extrude(tileSize, borderSize, extrudeColor));
}
