| public static Clamp ( double x, double min, double max ) : double | ||
| x | double | |
| min | double | |
| max | double | |
| return | double | |
public void ScrollCanvas(int dx, int dy)
{
Gtk.Viewport view = (Gtk.Viewport)PintaCore.Chrome.Canvas.Parent;
view.Hadjustment.Value = Utility.Clamp(dx + view.Hadjustment.Value, view.Hadjustment.Lower, view.Hadjustment.Upper - view.Hadjustment.PageSize);
view.Vadjustment.Value = Utility.Clamp(dy + view.Vadjustment.Value, view.Vadjustment.Lower, view.Vadjustment.Upper - view.Vadjustment.PageSize);
}
public ColorBgra Apply(float r, float g, float b)
{
ColorBgra ret = new ColorBgra();
float[] input = new float[] { b, g, r };
for (int i = 0; i < 3; i++)
{
float v = (input[i] - colorInLow[i]);
if (v < 0)
{
ret[i] = colorOutLow[i];
}
else if (v + colorInLow[i] >= colorInHigh[i])
{
ret[i] = colorOutHigh[i];
}
else
{
ret[i] = (byte)Utility.Clamp(
colorOutLow[i] + (colorOutHigh[i] - colorOutLow[i]) * Math.Pow(v / (colorInHigh[i] - colorInLow[i]), gamma[i]),
0.0f,
255.0f);
}
}
return(ret);
}
public void RecenterView(double x, double y)
{
Gtk.Viewport view = (Gtk.Viewport)PintaCore.Chrome.Canvas.Parent;
view.Hadjustment.Value = Utility.Clamp(x * Scale - view.Hadjustment.PageSize / 2, view.Hadjustment.Lower, view.Hadjustment.Upper);
view.Vadjustment.Value = Utility.Clamp(y * Scale - view.Vadjustment.PageSize / 2, view.Vadjustment.Lower, view.Vadjustment.Upper);
}
public Gdk.Rectangle ClampToImageSize(Gdk.Rectangle r)
{
int x = Utility.Clamp(r.X, 0, ImageSize.Width);
int y = Utility.Clamp(r.Y, 0, ImageSize.Height);
int width = Math.Min(r.Width, ImageSize.Width - x);
int height = Math.Min(r.Height, ImageSize.Height - y);
return(new Gdk.Rectangle(x, y, width, height));
}
public void SetGamma(int index, float val)
{
if (index < 0 || index >= 3)
{
throw new ArgumentOutOfRangeException("index", index, "Index must be between 0 and 2");
}
gamma[index] = Utility.Clamp(val, 0.1f, 10.0f);
UpdateLookupTable();
}
public double BoundLerp(double t)
{
if (t > 1)
{
t -= 2;
}
else if (t < -1)
{
t += 2;
}
return(Utility.Clamp(Math.Abs(t), 0, 1));
}
public static Level AutoFromLoMdHi(ColorBgra lo, ColorBgra md, ColorBgra hi)
{
float[] gamma = new float[3];
for (int i = 0; i < 3; i++)
{
if (lo[i] < md[i] && md[i] < hi[i])
{
gamma[i] = (float)Utility.Clamp(Math.Log(0.5, (float)(md[i] - lo[i]) / (float)(hi[i] - lo[i])), 0.1, 10.0);
}
else
{
gamma[i] = 1.0f;
}
}
return(new Level(lo, hi, gamma, ColorBgra.Black, ColorBgra.White));
}
private static byte BoundLerp(double t)
{
return((byte)(Utility.Clamp(Math.Abs(t), 0, 1) * 255f));
}
private byte BoundLerp(double t)
{
return((byte)(Utility.Clamp(t, 0, 1) * 255f));
}