public static ColorBgra GetColor(DistortionEffectProperties[] props, int x, int y, Surface src, ColorBgra bgra)
{
float offsetX = 0;
float offsetY = 0;
int radius = int.MaxValue;
int selected = 0;
for (int i = 0; i < props.Length; ++i)
{
float u = x - props[i].Center.X;
float v = y - props[i].Center.Y;
int r = (int)Math.Sqrt(u * u + v * v);
if (r < radius)
{
offsetX = u;
offsetY = v;
radius = r;
selected = i;
}
}
DistortionEffectProperties selectedProps = props[selected];
if (radius > 0 && radius < selectedProps.MaxRadius)
{
float scaleX = (float)selectedProps.TransferCurves[0][radius] / radius;
float scaleY = (float)selectedProps.TransferCurves[1][radius] / radius;
float xp = offsetX * scaleX;
float yp = offsetY * scaleY;
bgra = src.GetBilinearSampleClamped(selectedProps.Center.X + xp, selectedProps.Center.Y + yp);
}
return(bgra);
}
public static ColorBgra GetColor(DistortionEffectProperties props, int x, int y, Surface src, ColorBgra bgra)
{
float u = x - props.Center.X;
float v = y - props.Center.Y;
int radius = (int)Math.Sqrt(u * u + v * v);
if (radius > 0 && radius < props.MaxRadius)
{
float scaleX = (float)props.TransferCurves[0][radius] / radius;
float scaleY = (float)props.TransferCurves[1][radius] / radius;
float xp = u * scaleX;
float yp = v * scaleY;
bgra = src.GetBilinearSampleClamped(props.Center.X + xp, props.Center.Y + yp);
}
return(bgra);
}
protected override void OnSetRenderInfo(DistortionEffectConfigTokens newTokens, RenderArgs dstArgs, RenderArgs srcArgs)
{
Surface src = srcArgs.Surface;
int wdiv2 = src.Width / 2;
int hdiv2 = src.Height / 2;
int maxRadius = Math.Min(wdiv2, hdiv2);
for (int i = 0; i < newTokens.SubTokens.Length; ++i)
{
DistortionEffectConfigToken token = newTokens.SubTokens[i];
DistortionEffectProperties props = Props[i];
props.MaxRadius = (int)(maxRadius * token.ValueR);
props.TransferCurves = token.GetTransferCurves(new int[] { props.MaxRadius, props.MaxRadius }, new float[] { props.MaxRadius, props.MaxRadius });
props.Center = new PointF(wdiv2 + (float)token.ValueX * wdiv2, hdiv2 + (float)token.ValueY * hdiv2);
}
}
