/// <summary>
/// The position in the original string where the first character of the captured substring was found.
/// </summary>
/// <param name="queryString">
/// The query string to search.
/// </param>
/// <returns>
/// The zero-based starting position in the original string where the captured substring was found.
/// </returns>
public int MatchRegexIndex(string queryString)
{
this.SortOrder = int.MaxValue;
Match match = this.RegexPattern.Match(queryString);
if (match.Success)
{
this.SortOrder = match.Index;
int maxSize;
double maxSigma;
int maxThreshold;
int.TryParse(this.Processor.Settings["MaxSize"], NumberStyles.Any, CultureInfo.InvariantCulture, out maxSize);
double.TryParse(this.Processor.Settings["MaxSigma"], NumberStyles.Any, CultureInfo.InvariantCulture, out maxSigma);
int.TryParse(this.Processor.Settings["MaxThreshold"], NumberStyles.Any, CultureInfo.InvariantCulture, out maxThreshold);
NameValueCollection queryCollection = HttpUtility.ParseQueryString(queryString);
int size = QueryParamParser.Instance.ParseValue <int>(queryCollection["sharpen"]);
// Fall back to default sigma.
double sigma = queryCollection["sigma"] != null?QueryParamParser.Instance.ParseValue <double>(queryCollection["sigma"]) : 1.4d;
int threshold = QueryParamParser.Instance.ParseValue <int>(queryCollection["threshold"]);
// Normalize and set the variables.
size = ImageMaths.Clamp(size, 0, maxSize);
sigma = ImageMaths.Clamp(sigma, 0, maxSigma);
threshold = ImageMaths.Clamp(threshold, 0, maxThreshold);
this.Processor.DynamicParameter = new GaussianLayer(size, sigma, threshold);
}
return(this.SortOrder);
}
public void ThenShouldUseMaxValueGivenValueGreaterThanMax(int maxValue, int value)
{
// Arrange //Act
var result = ImageMaths.Clamp(value, int.MinValue, maxValue);
// Assert
Assert.That(result, Is.EqualTo(maxValue));
}
/// <summary>
/// Changes the opacity of the current image.
/// </summary>
/// <param name="percentage">
/// The percentage by which to alter the images opacity.
/// Any integer between 0 and 100.
/// </param>
/// <returns>
/// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
/// </returns>
public ImageFactory Alpha(int percentage)
{
if (this.ShouldProcess)
{
// Sanitize the input.
percentage = ImageMaths.Clamp(percentage, 0, 100);
Alpha alpha = new Alpha {
DynamicParameter = percentage
};
this.CurrentImageFormat.ApplyProcessor(alpha.ProcessImage, this);
}
return(this);
}
/// <summary>
/// The position in the original string where the first character of the captured substring was found.
/// </summary>
/// <param name="queryString">The query string to search.</param>
/// <returns>
/// The zero-based starting position in the original string where the captured substring was found.
/// </returns>
public int MatchRegexIndex(string queryString)
{
this.SortOrder = int.MaxValue;
Match match = this.RegexPattern.Match(queryString);
if (match.Success)
{
this.SortOrder = match.Index;
NameValueCollection queryCollection = HttpUtility.ParseQueryString(queryString);
int percentage = QueryParamParser.Instance.ParseValue <int>(queryCollection["brightness"]);
percentage = ImageMaths.Clamp(percentage, -100, 100);
this.Processor.DynamicParameter = percentage;
}
return(this.SortOrder);
}
/// <summary>
/// The position in the original string where the first character of the captured substring was found.
/// </summary>
/// <param name="queryString">The query string to search.</param>
/// <returns>
/// The zero-based starting position in the original string where the captured substring was found.
/// </returns>
public int MatchRegexIndex(string queryString)
{
this.SortOrder = int.MaxValue;
Match match = this.RegexPattern.Match(queryString);
if (match.Success)
{
this.SortOrder = match.Index;
NameValueCollection queryCollection = HttpUtility.ParseQueryString(queryString);
Color[] colors = QueryParamParser.Instance.ParseValue <Color[]>(queryCollection["replace"]);
int fuzziness = QueryParamParser.Instance.ParseValue <int>(queryCollection["fuzziness"]);
fuzziness = ImageMaths.Clamp(fuzziness, 0, 128);
this.Processor.DynamicParameter = new Tuple <Color, Color, int>(colors[0], colors[1], fuzziness);
}
return(this.SortOrder);
}
/// <summary>
/// The position in the original string where the first character of the captured substring was found.
/// </summary>
/// <param name="queryString">The query string to search.</param>
/// <returns>
/// The zero-based starting position in the original string where the captured substring was found.
/// </returns>
public int MatchRegexIndex(string queryString)
{
this.SortOrder = int.MaxValue;
Match match = this.RegexPattern.Match(queryString);
if (match.Success)
{
this.SortOrder = match.Index;
NameValueCollection queryCollection = HttpUtility.ParseQueryString(queryString);
int degrees = QueryParamParser.Instance.ParseValue <int>(queryCollection["hue"]);
bool rotate = QueryParamParser.Instance.ParseValue <bool>(queryCollection["hue.rotate"]);
degrees = ImageMaths.Clamp(degrees, 0, 360);
this.Processor.DynamicParameter = new Tuple <int, bool>(degrees, rotate);
}
return(this.SortOrder);
}
/// <summary>
/// Sets the resolution of the image.
/// <remarks>
/// This method sets both the bitmap data and EXIF resolution if available.
/// </remarks>
/// </summary>
/// <param name="horizontal">The horizontal resolution.</param>
/// <param name="vertical">The vertical resolution.</param>
/// <param name="unit">
/// The unit of measure for the horizontal resolution and the vertical resolution.
/// Defaults to inches
/// </param>
/// <returns>
/// The <see cref="ImageFactory"/>.
/// </returns>
public ImageFactory Resolution(int horizontal, int vertical, PropertyTagResolutionUnit unit = PropertyTagResolutionUnit.Inch)
{
if (this.ShouldProcess)
{
// Sanitize the input.
horizontal = ImageMaths.Clamp(horizontal, 0, int.MaxValue);
vertical = ImageMaths.Clamp(vertical, 0, int.MaxValue);
Tuple <int, int, PropertyTagResolutionUnit> resolution =
new Tuple <int, int, PropertyTagResolutionUnit>(horizontal, vertical, unit);
Resolution dpi = new Resolution {
DynamicParameter = resolution
};
this.CurrentImageFormat.ApplyProcessor(dpi.ProcessImage, this);
}
return(this);
}
/// <summary>
/// Converts an <see cref="T:System.Double"/> value into a valid <see cref="T:System.Byte"/>.
/// <remarks>
/// If the value given is less than 0 or greater than 255, the value will be constrained into
/// those restricted ranges.
/// </remarks>
/// </summary>
/// <param name="value">
/// The <see cref="T:System.Double"/> to convert.
/// </param>
/// <returns>
/// The <see cref="T:System.Byte"/>.
/// </returns>
public static byte ToByte(this double value)
{
return(Convert.ToByte(ImageMaths.Clamp(value, 0, 255)));
}
/// <summary>
/// Checks the range of the given value to ensure that it remains within the acceptable boundaries.
/// </summary>
/// <param name="value">
/// The value to check.
/// </param>
/// <returns>
/// The sanitized <see cref="float"/>.
/// </returns>
private static float Clamp(float value)
{
return(ImageMaths.Clamp(value, 0, 100));
}
/// <summary>
/// Initializes a new instance of the <see cref="YCbCrColor"/> struct.
/// </summary>
/// <param name="y">The y luminance component.</param>
/// <param name="cb">The u chroma component.</param>
/// <param name="cr">The v chroma component.</param>
private YCbCrColor(float y, float cb, float cr)
{
_y = ImageMaths.Clamp(y, 0, 255);
_cb = ImageMaths.Clamp(cb, 0, 255);
_cr = ImageMaths.Clamp(cr, 0, 255);
}
/// <summary> /// Converts an <see cref="T:System.Int32"/> value into a valid <see cref="T:System.Byte"/>. /// <remarks> /// If the value given is less than 0 or greater than 255, the value will be constrained into /// those restricted ranges. /// </remarks> /// </summary> /// <param name="value"> /// The <see cref="T:System.Int32"/> to convert. /// </param> /// <returns> /// The <see cref="T:System.Byte"/>. /// </returns> public static byte ToByte(this int value) => Convert.ToByte(ImageMaths.Clamp(value, 0, 255));
/// <summary> /// Checks the range of the given value to ensure that it remains within the acceptable boundaries. /// </summary> /// <param name="value"> /// The value to check. /// </param> /// <returns> /// The sanitized <see cref="float"/>. /// </returns> private static float Clamp(float value) => ImageMaths.Clamp(value, 0, 100);
/// <summary>
/// Initializes a new instance of the <see cref="YCbCrColor"/> struct.
/// </summary>
/// <param name="y">The y luminance component.</param>
/// <param name="cb">The u chroma component.</param>
/// <param name="cr">The v chroma component.</param>
private YCbCrColor(float y, float cb, float cr)
{
this.y = ImageMaths.Clamp(y, 0, 255);
this.cb = ImageMaths.Clamp(cb, 0, 255);
this.cr = ImageMaths.Clamp(cr, 0, 255);
}
/// <summary>
/// Applies the halftone filter.
/// </summary>
/// <param name="source">
/// The <see cref="Bitmap"/> to apply the filter to.
/// </param>
/// <returns>
/// The <see cref="Bitmap"/> with the filter applied.
/// </returns>
public Bitmap ApplyFilter(Bitmap source)
{
// TODO: Make this class implement an interface?
Bitmap cyan = null;
Bitmap magenta = null;
Bitmap yellow = null;
Bitmap keyline = null;
Bitmap newImage = null;
try
{
int width = source.Width;
int height = source.Height;
// Calculate min and max widths/heights.
Rectangle rotatedBounds = this.GetBoundingRectangle(width, height);
int minY = -(rotatedBounds.Height + height);
int maxY = rotatedBounds.Height + height;
int minX = -(rotatedBounds.Width + width);
int maxX = rotatedBounds.Width + width;
Point center = Point.Empty;
// Yellow oversaturates the output.
const float YellowMultiplier = 4;
float multiplier = YellowMultiplier * (float)Math.Sqrt(2);
float max = this.distance;
// Bump up the keyline max so that black looks black.
float keylineMax = max + ((float)Math.Sqrt(2) * 1.44f);
// Color sampled process colours from Wikipedia pages.
// Keyline brush is declared separately.
Brush cyanBrush = new SolidBrush(Color.FromArgb(0, 183, 235));
Brush magentaBrush = new SolidBrush(Color.FromArgb(255, 0, 144));
Brush yellowBrush = new SolidBrush(Color.FromArgb(255, 239, 0));
// Create our images.
cyan = new Bitmap(width, height);
magenta = new Bitmap(width, height);
yellow = new Bitmap(width, height);
keyline = new Bitmap(width, height);
newImage = new Bitmap(width, height);
// Ensure the correct resolution is set.
cyan.SetResolution(source.HorizontalResolution, source.VerticalResolution);
magenta.SetResolution(source.HorizontalResolution, source.VerticalResolution);
yellow.SetResolution(source.HorizontalResolution, source.VerticalResolution);
keyline.SetResolution(source.HorizontalResolution, source.VerticalResolution);
newImage.SetResolution(source.HorizontalResolution, source.VerticalResolution);
// Check bounds against this.
Rectangle rectangle = new Rectangle(0, 0, width, height);
using (Graphics graphicsCyan = Graphics.FromImage(cyan))
using (Graphics graphicsMagenta = Graphics.FromImage(magenta))
using (Graphics graphicsYellow = Graphics.FromImage(yellow))
using (Graphics graphicsKeyline = Graphics.FromImage(keyline))
{
// Set the quality properties.
graphicsCyan.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphicsMagenta.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphicsYellow.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphicsKeyline.PixelOffsetMode = PixelOffsetMode.HighQuality;
// Set up the canvas.
graphicsCyan.Clear(Color.Transparent);
graphicsMagenta.Clear(Color.Transparent);
graphicsYellow.Clear(Color.Transparent);
graphicsKeyline.Clear(Color.Transparent);
int d = this.distance;
// This is too slow. The graphics object can't be called within a parallel
// loop so we have to do it old school. :(
using (FastBitmap sourceBitmap = new FastBitmap(source))
{
for (int y = minY; y < maxY; y += d)
{
for (int x = minX; x < maxX; x += d)
{
Color color;
CmykColor cmykColor;
float brushWidth;
int offsetX = x - (d >> 1);
int offsetY = y - (d >> 1);
// Cyan
Point rotatedPoint = ImageMaths.RotatePoint(new Point(offsetX, offsetY), this.cyanAngle, center);
int angledX = rotatedPoint.X;
int angledY = rotatedPoint.Y;
if (rectangle.Contains(new Point(angledX, angledY)))
{
color = sourceBitmap.GetPixel(angledX, angledY);
cmykColor = color;
brushWidth = ImageMaths.Clamp(d * (cmykColor.C / 255f) * multiplier, 0, max);
graphicsCyan.FillEllipse(cyanBrush, angledX, angledY, brushWidth, brushWidth);
}
// Magenta
rotatedPoint = ImageMaths.RotatePoint(new Point(offsetX, offsetY), this.magentaAngle, center);
angledX = rotatedPoint.X;
angledY = rotatedPoint.Y;
if (rectangle.Contains(new Point(angledX, angledY)))
{
color = sourceBitmap.GetPixel(angledX, angledY);
cmykColor = color;
brushWidth = ImageMaths.Clamp(d * (cmykColor.M / 255f) * multiplier, 0, max);
graphicsMagenta.FillEllipse(magentaBrush, angledX, angledY, brushWidth, brushWidth);
}
// Yellow
rotatedPoint = ImageMaths.RotatePoint(new Point(offsetX, offsetY), this.yellowAngle, center);
angledX = rotatedPoint.X;
angledY = rotatedPoint.Y;
if (rectangle.Contains(new Point(angledX, angledY)))
{
color = sourceBitmap.GetPixel(angledX, angledY);
cmykColor = color;
brushWidth = ImageMaths.Clamp(d * (cmykColor.Y / 255f) * YellowMultiplier, 0, max);
graphicsYellow.FillEllipse(yellowBrush, angledX, angledY, brushWidth, brushWidth);
}
// Keyline
rotatedPoint = ImageMaths.RotatePoint(new Point(offsetX, offsetY), this.keylineAngle, center);
angledX = rotatedPoint.X;
angledY = rotatedPoint.Y;
if (rectangle.Contains(new Point(angledX, angledY)))
{
color = sourceBitmap.GetPixel(angledX, angledY);
cmykColor = color;
brushWidth = ImageMaths.Clamp(d * (cmykColor.K / 255f) * multiplier, 0, keylineMax);
// Just using black is too dark.
Brush keylineBrush = new SolidBrush(CmykColor.FromCmykColor(0, 0, 0, cmykColor.K));
graphicsKeyline.FillEllipse(keylineBrush, angledX, angledY, brushWidth, brushWidth);
}
}
}
}
// Set our white background.
using (Graphics graphics = Graphics.FromImage(newImage))
{
graphics.Clear(Color.White);
}
// Blend the colors now to mimic adaptive blending.
using (FastBitmap cyanBitmap = new FastBitmap(cyan))
using (FastBitmap magentaBitmap = new FastBitmap(magenta))
using (FastBitmap yellowBitmap = new FastBitmap(yellow))
using (FastBitmap keylineBitmap = new FastBitmap(keyline))
using (FastBitmap destinationBitmap = new FastBitmap(newImage))
{
Parallel.For(
0,
height,
y =>
{
for (int x = 0; x < width; x++)
{
// ReSharper disable AccessToDisposedClosure
Color cyanPixel = cyanBitmap.GetPixel(x, y);
Color magentaPixel = magentaBitmap.GetPixel(x, y);
Color yellowPixel = yellowBitmap.GetPixel(x, y);
Color keylinePixel = keylineBitmap.GetPixel(x, y);
CmykColor blended = cyanPixel.AddAsCmykColor(magentaPixel, yellowPixel, keylinePixel);
if (rectangle.Contains(new Point(x, y)))
{
destinationBitmap.SetPixel(x, y, blended);
}
// ReSharper restore AccessToDisposedClosure
}
});
}
}
cyan.Dispose();
magenta.Dispose();
yellow.Dispose();
keyline.Dispose();
source.Dispose();
source = newImage;
}
catch
{
if (cyan != null)
{
cyan.Dispose();
}
if (magenta != null)
{
magenta.Dispose();
}
if (yellow != null)
{
yellow.Dispose();
}
if (keyline != null)
{
keyline.Dispose();
}
if (newImage != null)
{
newImage.Dispose();
}
}
return(source);
}
/// <summary> /// Converts an <see cref="T:System.Float"/> value into a valid <see cref="T:System.Byte"/>. /// <remarks> /// If the value given is less than 0 or greater than 255, the value will be constrained into /// those restricted ranges. /// </remarks> /// </summary> /// <param name="value"> /// The <see cref="T:System.Float"/> to convert. /// </param> /// <returns> /// The <see cref="T:System.Byte"/>. /// </returns> public static byte ToByte(this float value) => Convert.ToByte(ImageMaths.Clamp(value, byte.MinValue, byte.MaxValue));