public static Image Apply(this ConvolutionMatrix kernel, Image img)
{
Bitmap result = (Bitmap)img.Clone();
using (UnsafeBitmap source = new UnsafeBitmap((Bitmap)img, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap dest = new UnsafeBitmap(result, true, ImageLockMode.WriteOnly))
{
int originX = (kernel.Width - 1) / 2;
int originY = (kernel.Height - 1) / 2;
for (int y = 0; y < source.Height; y++)
{
for (int x = 0; x < source.Width; x++)
{
double r = 0.0;
double g = 0.0;
double b = 0.0;
// Apply each matrix multiplier to the color components for each pixel.
for (int fy = 0; fy < kernel.Height; fy++)
{
int fyr = fy - originY;
int offsetY = y + fyr;
offsetY.Clamp(0, source.Height - 1);
for (int fx = 0; fx < kernel.Width; fx++)
{
int fxr = fx - originX;
int offsetX = x + fxr;
offsetX.Clamp(0, source.Width - 1);
ColorBgra currentColor = source.GetPixel(offsetX, offsetY);
r += kernel[fy, fx] * currentColor.Red;
g += kernel[fy, fx] * currentColor.Green;
b += kernel[fy, fx] * currentColor.Blue;
}
}
r += kernel.Offset;
r.Clamp(0, 255);
g += kernel.Offset;
g.Clamp(0, 255);
b += kernel.Offset;
b.Clamp(0, 255);
dest.SetPixel(x, y, new ColorBgra((byte)b, (byte)g, (byte)r, source.GetPixel(x, y).Alpha));
}
}
}
return(result);
}
public static Bitmap AddReflection(Image img, int percentage, int maxAlpha, int minAlpha)
{
percentage = percentage.Between(1, 100);
maxAlpha = maxAlpha.Between(0, 255);
minAlpha = minAlpha.Between(0, 255);
Bitmap reflection;
using (Bitmap bitmapRotate = (Bitmap)img.Clone())
{
bitmapRotate.RotateFlip(RotateFlipType.RotateNoneFlipY);
reflection = bitmapRotate.Clone(new Rectangle(0, 0, bitmapRotate.Width, (int)(bitmapRotate.Height * ((float)percentage / 100))), PixelFormat.Format32bppArgb);
}
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(reflection, true))
{
int alphaAdd = maxAlpha - minAlpha;
float reflectionHeight = reflection.Height - 1;
for (int y = 0; y < reflection.Height; ++y)
{
for (int x = 0; x < reflection.Width; ++x)
{
ColorBgra color = unsafeBitmap.GetPixel(x, y);
byte alpha = (byte)(maxAlpha - (alphaAdd * (y / reflectionHeight)));
if (color.Alpha > alpha)
{
color.Alpha = alpha;
unsafeBitmap.SetPixel(x, y, color);
}
}
}
}
return(reflection);
}
private static Bitmap CreateTransparentImage(Bitmap whiteBackground, Bitmap blackBackground)
{
if (whiteBackground != null && blackBackground != null && whiteBackground.Size == blackBackground.Size)
{
Bitmap result = new Bitmap(whiteBackground.Width, whiteBackground.Height, PixelFormat.Format32bppArgb);
using (UnsafeBitmap whiteBitmap = new UnsafeBitmap(whiteBackground, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap blackBitmap = new UnsafeBitmap(blackBackground, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap resultBitmap = new UnsafeBitmap(result, true, ImageLockMode.WriteOnly))
{
int pixelCount = blackBitmap.PixelCount;
for (int i = 0; i < pixelCount; i++)
{
ColorBgra white = whiteBitmap.GetPixel(i);
ColorBgra black = blackBitmap.GetPixel(i);
double alpha = (black.Red - white.Red + 255) / 255.0;
if (alpha == 1)
{
resultBitmap.SetPixel(i, white);
}
else if (alpha > 0)
{
white.Blue = (byte)(black.Blue / alpha);
white.Green = (byte)(black.Green / alpha);
white.Red = (byte)(black.Red / alpha);
white.Alpha = (byte)(255 * alpha);
resultBitmap.SetPixel(i, white);
}
}
}
return result;
}
return whiteBackground;
}
public static Bitmap AddReflection(Image img, int percentage, int maxAlpha, int minAlpha)
{
percentage = percentage.Between(1, 100);
maxAlpha = maxAlpha.Between(0, 255);
minAlpha = minAlpha.Between(0, 255);
Bitmap reflection;
using (Bitmap bitmapRotate = (Bitmap)img.Clone())
{
bitmapRotate.RotateFlip(RotateFlipType.RotateNoneFlipY);
reflection = bitmapRotate.Clone(new Rectangle(0, 0, bitmapRotate.Width, (int)(bitmapRotate.Height * ((float)percentage / 100))), PixelFormat.Format32bppArgb);
}
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(reflection, true))
{
int alphaAdd = maxAlpha - minAlpha;
float reflectionHeight = reflection.Height - 1;
for (int y = 0; y < reflection.Height; ++y)
{
for (int x = 0; x < reflection.Width; ++x)
{
ColorBgra color = unsafeBitmap.GetPixel(x, y);
byte alpha = (byte)(maxAlpha - (alphaAdd * (y / reflectionHeight)));
if (color.Alpha > alpha)
{
color.Alpha = alpha;
unsafeBitmap.SetPixel(x, y, color);
}
}
}
}
return reflection;
}
public static void HighlightImage(Bitmap bmp, Rectangle rect, Color highlightColor)
{
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
for (int y = rect.Y; y < rect.Height; y++)
{
for (int x = rect.X; x < rect.Width; x++)
{
ColorBgra color = unsafeBitmap.GetPixel(x, y);
color.Red = Math.Min(color.Red, highlightColor.R);
color.Green = Math.Min(color.Green, highlightColor.G);
color.Blue = Math.Min(color.Blue, highlightColor.B);
unsafeBitmap.SetPixel(x, y, color);
}
}
}
}
public static Bitmap Apply(this ConvolutionMatrix kernel, Bitmap bmp)
{
Bitmap bmpResult = (Bitmap)bmp.Clone();
using (UnsafeBitmap source = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap dest = new UnsafeBitmap(bmpResult, true, ImageLockMode.WriteOnly))
{
int originX = (kernel.Width - 1) / 2;
int originY = (kernel.Height - 1) / 2;
Parallel.For(0, source.Height, y =>
{
Parallel.For(0, source.Width, x =>
{
double r = 0.0;
double g = 0.0;
double b = 0.0;
double a = 0.0;
// Apply each matrix multiplier to the color components for each pixel.
for (int fy = 0; fy < kernel.Height; fy++)
{
int fyr = fy - originY;
int offsetY = y + fyr;
offsetY = offsetY.Clamp(0, source.Height - 1);
for (int fx = 0; fx < kernel.Width; fx++)
{
int fxr = fx - originX;
int offsetX = x + fxr;
offsetX = offsetX.Clamp(0, source.Width - 1);
ColorBgra currentColor = source.GetPixel(offsetX, offsetY);
r += kernel[fy, fx] * currentColor.Red;
g += kernel[fy, fx] * currentColor.Green;
b += kernel[fy, fx] * currentColor.Blue;
if (kernel.ConsiderAlpha)
{
a += kernel[fy, fx] * currentColor.Alpha;
}
}
}
r += kernel.Offset;
r = r.Clamp(0, 255);
g += kernel.Offset;
g = g.Clamp(0, 255);
b += kernel.Offset;
b = b.Clamp(0, 255);
if (kernel.ConsiderAlpha)
{
a += kernel.Offset;
a = a.Clamp(0, 255);
}
dest.SetPixel(x, y, new ColorBgra((byte)b, (byte)g, (byte)r, kernel.ConsiderAlpha ? (byte)a : source.GetPixel(x, y).Alpha));
});
});
}
return(bmpResult);
}
public static Image Apply(this ConvolutionMatrix matrix, Image img)
{
int factor = Math.Max(matrix.Factor, 1);
Bitmap result = (Bitmap)img.Clone();
using (UnsafeBitmap source = new UnsafeBitmap((Bitmap)img, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap dest = new UnsafeBitmap(result, true, ImageLockMode.WriteOnly))
{
int height = source.Height - 2;
int width = source.Width - 2;
ColorBgra[,] pixelColor = new ColorBgra[3, 3];
int pixel;
ColorBgra color = new ColorBgra();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
pixelColor[0, 0] = source.GetPixel(x, y);
pixelColor[0, 1] = source.GetPixel(x, y + 1);
pixelColor[0, 2] = source.GetPixel(x, y + 2);
pixelColor[1, 0] = source.GetPixel(x + 1, y);
pixelColor[1, 1] = source.GetPixel(x + 1, y + 1);
pixelColor[1, 2] = source.GetPixel(x + 1, y + 2);
pixelColor[2, 0] = source.GetPixel(x + 2, y);
pixelColor[2, 1] = source.GetPixel(x + 2, y + 1);
pixelColor[2, 2] = source.GetPixel(x + 2, y + 2);
pixel = (((pixelColor[0, 0].Blue * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Blue * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Blue * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Blue * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Blue * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Blue * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Blue * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Blue * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Blue * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0)
{
pixel = 0;
}
else if (pixel > 255)
{
pixel = 255;
}
color.Blue = (byte)pixel;
pixel = (((pixelColor[0, 0].Green * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Green * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Green * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Green * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Green * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Green * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Green * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Green * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Green * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0)
{
pixel = 0;
}
else if (pixel > 255)
{
pixel = 255;
}
color.Green = (byte)pixel;
pixel = (((pixelColor[0, 0].Red * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Red * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Red * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Red * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Red * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Red * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Red * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Red * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Red * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0)
{
pixel = 0;
}
else if (pixel > 255)
{
pixel = 255;
}
color.Red = (byte)pixel;
color.Alpha = pixelColor[1, 1].Alpha;
dest.SetPixel(x + 1, y + 1, color);
}
}
}
return(result);
}
public static Image Apply(this ConvolutionMatrix matrix, Image img)
{
int factor = Math.Max(matrix.Factor, 1);
Bitmap result = (Bitmap)img.Clone();
using (UnsafeBitmap source = new UnsafeBitmap((Bitmap)img, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap dest = new UnsafeBitmap(result, true, ImageLockMode.WriteOnly))
{
int height = source.Height - 2;
int width = source.Width - 2;
ColorBgra[,] pixelColor = new ColorBgra[3, 3];
int pixel;
ColorBgra color = new ColorBgra();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
pixelColor[0, 0] = source.GetPixel(x, y);
pixelColor[0, 1] = source.GetPixel(x, y + 1);
pixelColor[0, 2] = source.GetPixel(x, y + 2);
pixelColor[1, 0] = source.GetPixel(x + 1, y);
pixelColor[1, 1] = source.GetPixel(x + 1, y + 1);
pixelColor[1, 2] = source.GetPixel(x + 1, y + 2);
pixelColor[2, 0] = source.GetPixel(x + 2, y);
pixelColor[2, 1] = source.GetPixel(x + 2, y + 1);
pixelColor[2, 2] = source.GetPixel(x + 2, y + 2);
pixel = (((pixelColor[0, 0].Blue * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Blue * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Blue * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Blue * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Blue * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Blue * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Blue * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Blue * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Blue * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0) pixel = 0;
else if (pixel > 255) pixel = 255;
color.Blue = (byte)pixel;
pixel = (((pixelColor[0, 0].Green * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Green * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Green * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Green * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Green * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Green * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Green * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Green * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Green * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0) pixel = 0;
else if (pixel > 255) pixel = 255;
color.Green = (byte)pixel;
pixel = (((pixelColor[0, 0].Red * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Red * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Red * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Red * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Red * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Red * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Red * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Red * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Red * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0) pixel = 0;
else if (pixel > 255) pixel = 255;
color.Red = (byte)pixel;
color.Alpha = pixelColor[1, 1].Alpha;
dest.SetPixel(x + 1, y + 1, color);
}
}
}
return result;
}
public static void Pixelate(Bitmap bmp, int pixelSize)
{
if (pixelSize > 1)
{
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
for (int y = 0; y < unsafeBitmap.Height; y += pixelSize)
{
for (int x = 0; x < unsafeBitmap.Width; x += pixelSize)
{
int xLimit = Math.Min(x + pixelSize, unsafeBitmap.Width);
int yLimit = Math.Min(y + pixelSize, unsafeBitmap.Height);
int pixelCount = (xLimit - x) * (yLimit - y);
int r = 0, g = 0, b = 0, a = 0;
for (int y2 = y; y2 < yLimit; y2++)
{
for (int x2 = x; x2 < xLimit; x2++)
{
ColorBgra color = unsafeBitmap.GetPixel(x2, y2);
r += color.Red;
g += color.Green;
b += color.Blue;
a += color.Alpha;
}
}
ColorBgra averageColor = new ColorBgra((byte)(b / pixelCount), (byte)(g / pixelCount), (byte)(r / pixelCount), (byte)(a / pixelCount));
for (int y2 = y; y2 < yLimit; y2++)
{
for (int x2 = x; x2 < xLimit; x2++)
{
unsafeBitmap.SetPixel(x2, y2, averageColor);
}
}
}
}
}
}
}
// http://incubator.quasimondo.com/processing/superfast_blur.php
public static void FastBoxBlur(Bitmap bmp, int radius)
{
if (radius < 1) return;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
int w = unsafeBitmap.Width;
int h = unsafeBitmap.Height;
int wm = w - 1;
int hm = h - 1;
int wh = w * h;
int div = radius + radius + 1;
byte[] r = new byte[wh];
byte[] g = new byte[wh];
byte[] b = new byte[wh];
byte[] a = new byte[wh];
int rsum, gsum, bsum, asum, x, y, i, p, p1, p2, yp, yi, yw;
int[] vmin = new int[Math.Max(w, h)];
int[] vmax = new int[Math.Max(w, h)];
byte[] dv = new byte[256 * div];
for (i = 0; i < 256 * div; i++)
{
dv[i] = (byte)(i / div);
}
yw = yi = 0;
for (y = 0; y < h; y++)
{
rsum = gsum = bsum = asum = 0;
for (i = -radius; i <= radius; i++)
{
p = (yi + Math.Min(wm, Math.Max(i, 0)));
ColorBgra color = unsafeBitmap.GetPixel(p);
rsum += color.Red;
gsum += color.Green;
bsum += color.Blue;
asum += color.Alpha;
}
for (x = 0; x < w; x++)
{
r[yi] = dv[rsum];
g[yi] = dv[gsum];
b[yi] = dv[bsum];
a[yi] = dv[asum];
if (y == 0)
{
vmin[x] = Math.Min(x + radius + 1, wm);
vmax[x] = Math.Max(x - radius, 0);
}
p1 = (yw + vmin[x]);
p2 = (yw + vmax[x]);
ColorBgra color1 = unsafeBitmap.GetPixel(p1);
ColorBgra color2 = unsafeBitmap.GetPixel(p2);
rsum += color1.Red - color2.Red;
gsum += color1.Green - color2.Green;
bsum += color1.Blue - color2.Blue;
asum += color1.Alpha - color2.Alpha;
yi++;
}
yw += w;
}
for (x = 0; x < w; x++)
{
rsum = gsum = bsum = asum = 0;
yp = -radius * w;
for (i = -radius; i <= radius; i++)
{
yi = Math.Max(0, yp) + x;
rsum += r[yi];
gsum += g[yi];
bsum += b[yi];
asum += a[yi];
yp += w;
}
yi = x;
for (y = 0; y < h; y++)
{
ColorBgra color = new ColorBgra(dv[bsum], dv[gsum], dv[rsum], dv[asum]);
unsafeBitmap.SetPixel(yi, color);
if (x == 0)
{
vmin[y] = Math.Min(y + radius + 1, hm) * w;
vmax[y] = Math.Max(y - radius, 0) * w;
}
p1 = x + vmin[y];
p2 = x + vmax[y];
rsum += r[p1] - r[p2];
gsum += g[p1] - g[p2];
bsum += b[p1] - b[p2];
asum += a[p1] - a[p2];
yi += w;
}
}
}
}
private static void BoxBlurVertical(UnsafeBitmap unsafeBitmap, int range)
{
int w = unsafeBitmap.Width;
int h = unsafeBitmap.Height;
int halfRange = range / 2;
ColorBgra[] newColors = new ColorBgra[w];
for (int x = 0; x < w; x++)
{
int hits = 0;
int r = 0;
int g = 0;
int b = 0;
int a = 0;
for (int y = -halfRange; y < h; y++)
{
int oldPixel = y - halfRange - 1;
if (oldPixel >= 0)
{
ColorBgra color = unsafeBitmap.GetPixel(x, oldPixel);
if (color.Bgra != 0)
{
r -= color.Red;
g -= color.Green;
b -= color.Blue;
a -= color.Alpha;
}
hits--;
}
int newPixel = y + halfRange;
if (newPixel < h)
{
ColorBgra color = unsafeBitmap.GetPixel(x, newPixel);
if (color.Bgra != 0)
{
r += color.Red;
g += color.Green;
b += color.Blue;
a += color.Alpha;
}
hits++;
}
if (y >= 0)
{
newColors[y] = new ColorBgra((byte)(b / hits), (byte)(g / hits), (byte)(r / hits), (byte)(a / hits));
}
}
for (int y = 0; y < h; y++)
{
unsafeBitmap.SetPixel(x, y, newColors[y]);
}
}
}