private static Func<int, int, byte> GetTransitionAlphaFunc(EdgeTransition edgeTransition, CornerTransition cornerTransition, int tileSize, float innerRadius, float outerRadius, float _255OverRadiusDiff)
{
if (edgeTransition != EdgeTransition.None)
{
return GetEdgeOpacityAlphaFunc((byte)edgeTransition, tileSize, innerRadius, outerRadius, _255OverRadiusDiff);
}
if (cornerTransition != CornerTransition.None)
{
return GetCornerOpacityAlphaFunc((byte)cornerTransition, tileSize, innerRadius, outerRadius, _255OverRadiusDiff);
}
return (x, y) => 1;
}
public static Image CreateAutoTransitionImage(Image img, int tileSize, EdgeTransition edgeTransition, CornerTransition cornerTransition, float innerRadius, float outerRadius)
{
var alphaFunc = GetTransitionAlphaFunc(edgeTransition, cornerTransition, tileSize, innerRadius, outerRadius, (float)(255.0 / (outerRadius - innerRadius)));
using (var sourceBmp = new Bitmap(img))
{
var bitLock = sourceBmp.LockBits(new Rectangle(0, 0, img.Width, img.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
try
{
float _255OverRadiusDiff = 255.0f / (outerRadius - innerRadius);
unsafe
{
byte* srcImg = (byte*)bitLock.Scan0.ToPointer();
byte[] destData = new byte[img.Width * img.Height * 4];
int offset = 0;
fixed (byte* dstImg = &destData[0])
{
for (var y = 0; y < img.Height; ++y)
{
for (var x = 0; x < img.Width; ++x, offset += 4)
{
dstImg[offset + 0] = srcImg[offset + 0];
dstImg[offset + 1] = srcImg[offset + 1];
dstImg[offset + 2] = srcImg[offset + 2];
dstImg[offset + 3] = alphaFunc(x, y);
}
}
return new Bitmap(img.Width, img.Height, img.Width * 4, PixelFormat.Format32bppArgb, (IntPtr)dstImg);
}
}
}
finally
{
sourceBmp.UnlockBits(bitLock);
}
}
}
private TileInfo CreateTileInfo(TileSet sourceTileSet, string path, EdgeTransition edgeTransition, CornerTransition cornerTransition)
{
if (path == null)
{
return new TileInfo { Path = sourceTileSet.BaseTilePath, CornerTransition = cornerTransition, EdgeTransition = edgeTransition, AutoTransition = true };
}
bool flipHorizontal = false;
bool flipVertical = false;
if (path.Contains("{hflip}"))
{
path = path.Replace("{hflip}", "");
flipHorizontal = true;
}
if (path.Contains("{vflip}"))
{
path = path.Replace("{vflip}", "");
flipVertical = true;
}
return new TileInfo { Path = path, FlipHorizontal = flipHorizontal, FlipVertical = flipVertical, CornerTransition = cornerTransition, EdgeTransition = edgeTransition, AutoTransition = false };
}
public void SetCornerTilePath(CornerTransition transition, string path)
{
CornerTilePaths[(int)transition] = path;
}