public static Texture2D GetGradient(int sR, int sG, int sB, int sA, int eR, int eG, int eB, int eA,
GradientSide gradientSide,
int steps)
{
return(GetGradient(new Color(sR / 255f, sG / 255f, sB / 255f, sA / 255f),
new Color(eR / 255f, eG / 255f, eB / 255f, eA / 255f), gradientSide, steps));
}
public static Texture2D GetGradient(Color startColor, Color endColor, GradientSide gradientSide, int steps)
{
Object ret;
string name = "_g_" +
startColor.r +
"_" +
startColor.g +
"_" +
startColor.b +
"_" +
startColor.a +
"_" +
endColor.r +
"_" +
endColor.g +
"_" +
endColor.b +
"_" +
endColor.a +
"_" +
gradientSide +
"_" +
steps;
if (objects.TryGetValue(name, out ret))
{
return((Texture2D)ret);
}
Texture2D tex =
new Texture2D(gradientSide == GradientSide.LEFT || gradientSide == GradientSide.RIGHT ? steps : 1,
gradientSide == GradientSide.TOP || gradientSide == GradientSide.BOTTOM ? steps : 1);
Color[] colors = CalculateGradient(startColor, endColor, steps);
if (gradientSide == GradientSide.TOP || gradientSide == GradientSide.BOTTOM)
{
for (int i = 0; i < colors.Length; i++)
{
tex.SetPixel(0, gradientSide == GradientSide.TOP ? i : colors.Length - i - 1, colors[i]);
}
}
else
{
for (int i = 0; i < colors.Length; i++)
{
tex.SetPixel(gradientSide == GradientSide.LEFT ? i : colors.Length - i - 1, 0, colors[i]);
}
}
tex.Apply();
objects.Add(name, tex);
return(tex);
}
public static bool AlphaGradient(ref Bitmap bmp, float[] factor,
float[] position, GradientSide gs)
{
if (bmp.PixelFormat != PixelFormat.Format24bppRgb)
return false;
int w = bmp.Width;
int h = bmp.Height;
Bitmap tmp = new Bitmap(w, h, PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(tmp);
g.DrawImageUnscaled(bmp, 0, 0);
g.Dispose();
Color startColor = Color.White;
Color endColor = Color.Black;
Point start = new Point(-1, 0);
Point end = new Point(0, 0);
switch (gs)
{
case GradientSide.Left:
end.X = w;
break;
case GradientSide.Right:
start.X = w;
break;
case GradientSide.Upper:
end.Y = h;
break;
case GradientSide.Lower:
start.Y = h;
break;
case GradientSide.UpperLeft:
end.X = w;
end.Y = h;
break;
case GradientSide.UpperRight:
start.X = w;
end.Y = h;
break;
case GradientSide.LowerLeft:
start.Y = h;
end.X = w;
break;
case GradientSide.LowerRight:
start.X = w;
start.Y = h;
break;
}
Blend bl = new Blend();
bl.Factors = factor;
bl.Positions = position;
LinearGradientBrush br = new LinearGradientBrush(
start, end, startColor, endColor);
br.Blend = bl;
//br.GammaCorrection = true;
Rectangle rct = new Rectangle(0, 0, w, h);
g = Graphics.FromImage(bmp);
g.FillRectangle(br, rct);
g.Dispose();
BmpProc24 src = new BmpProc24(bmp);
BmpProc32 dst = new BmpProc32(tmp);
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++)
dst[x, y, eRGB.a] = src[x, y, eRGB.r];
CallDispose(dst, src, bmp);
bmp = tmp;
return true;
}
public static bool GradientColor(ref Bitmap bmp, float[] factor,
float[] position, GradientSide gs)
{
Bitmap tmp = bmp.Clone() as Bitmap;
if (!AlphaGradient(ref tmp, factor, position, gs))
{
tmp.Dispose();
return false;
}
GrayScale24(ref bmp);
Graphics g = Graphics.FromImage(bmp);
g.DrawImageUnscaled(tmp, 0, 0);
g.Dispose();
tmp.Dispose();
return true;
}
