/// <summary>
/// Finds the bounding rectangle based on the first instance of any color component other
/// than the given one.
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <param name="bitmap">The <see cref="Image"/> to search within.</param>
/// <param name="componentValue">The color component value to remove.</param>
/// <param name="channel">The <see cref="RgbaComponent"/> channel to test against.</param>
/// <returns>
/// The <see cref="Rectangle"/>.
/// </returns>
public static Rectangle GetFilteredBoundingRectangle <TColor>(ImageBase <TColor> bitmap, float componentValue, RgbaComponent channel = RgbaComponent.B)
where TColor : struct, IPixel <TColor>
{
int width = bitmap.Width;
int height = bitmap.Height;
Point topLeft = default(Point);
Point bottomRight = default(Point);
Func <PixelAccessor <TColor>, int, int, float, bool> delegateFunc;
// Determine which channel to check against
switch (channel)
{
case RgbaComponent.R:
delegateFunc = (pixels, x, y, b) => MathF.Abs(pixels[x, y].ToVector4().X - b) > Constants.Epsilon;
break;
case RgbaComponent.G:
delegateFunc = (pixels, x, y, b) => MathF.Abs(pixels[x, y].ToVector4().Y - b) > Constants.Epsilon;
break;
case RgbaComponent.B:
delegateFunc = (pixels, x, y, b) => MathF.Abs(pixels[x, y].ToVector4().Z - b) > Constants.Epsilon;
break;
default:
delegateFunc = (pixels, x, y, b) => MathF.Abs(pixels[x, y].ToVector4().W - b) > Constants.Epsilon;
break;
}
Func <PixelAccessor <TColor>, int> getMinY = pixels =>
{
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
if (delegateFunc(pixels, x, y, componentValue))
{
return(y);
}
}
}
return(0);
};
Func <PixelAccessor <TColor>, int> getMaxY = pixels =>
{
for (int y = height - 1; y > -1; y--)
{
for (int x = 0; x < width; x++)
{
if (delegateFunc(pixels, x, y, componentValue))
{
return(y);
}
}
}
return(height);
};
Func <PixelAccessor <TColor>, int> getMinX = pixels =>
{
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
if (delegateFunc(pixels, x, y, componentValue))
{
return(x);
}
}
}
return(0);
};
Func <PixelAccessor <TColor>, int> getMaxX = pixels =>
{
for (int x = width - 1; x > -1; x--)
{
for (int y = 0; y < height; y++)
{
if (delegateFunc(pixels, x, y, componentValue))
{
return(x);
}
}
}
return(height);
};
using (PixelAccessor <TColor> bitmapPixels = bitmap.Lock())
{
topLeft.Y = getMinY(bitmapPixels);
topLeft.X = getMinX(bitmapPixels);
bottomRight.Y = (getMaxY(bitmapPixels) + 1).Clamp(0, height);
bottomRight.X = (getMaxX(bitmapPixels) + 1).Clamp(0, width);
}
return(GetBoundingRectangle(topLeft, bottomRight));
}
/// <summary>
/// Copies the properties from the other <see cref="ImageBase{TColor, TPacked}"/>.
/// </summary>
/// <param name="other">
/// The other <see cref="ImageBase{TColor, TPacked}"/> to copy the properties from.
/// </param>
protected void CopyProperties(ImageBase <TColor, TPacked> other)
{
this.Quality = other.Quality;
this.FrameDelay = other.FrameDelay;
}
/// <summary>
/// Initializes a new instance of the <see cref="Image{TColor}"/> class
/// by making a copy from another image.
/// </summary>
/// <param name="other">The other image, where the clone should be made from.</param>
/// <exception cref="System.ArgumentNullException"><paramref name="other"/> is null.</exception>
public Image(ImageBase <TColor> other)
: base(other)
{
this.CopyProperties(other);
}
/// <summary>
/// Initializes a new instance of the <see cref="Image{TPixel}"/> class
/// by making a copy from another image.
/// </summary>
/// <param name="other">The other image, where the clone should be made from.</param>
/// <exception cref="System.ArgumentNullException"><paramref name="other"/> is null.</exception>
public Image(ImageBase <TPixel> other)
: base(other)
{
this.MetaData = new ImageMetaData();
}
/// <summary>
/// Initializes a new instance of the <see cref="PixelAccessor"/> class.
/// </summary>
/// <param name="image">The image to provide pixel access for.</param>
public PixelAccessor(ImageBase <Color, uint> image)
: base(image)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="Image{TPixel}"/> class
/// by making a copy from another image.
/// </summary>
/// <param name="other">The other image, where the clone should be made from.</param>
/// <exception cref="System.ArgumentNullException"><paramref name="other"/> is null.</exception>
public Image(ImageBase <TPixel> other)
: base(other)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="ImageFrame{TColor}"/> class.
/// </summary>
/// <param name="image">The image to create the frame from.</param>
public ImageFrame(ImageBase <TColor> image)
: base(image)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="ImageFrame{TPixel}"/> class.
/// </summary>
/// <param name="image">The image to create the frame from.</param>
public ImageFrame(ImageBase <TPixel> image)
: base(image)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="ImageFrame{TColor, TPacked}"/> class.
/// </summary>
/// <param name="image">The image to create the frame from.</param>
public ImageFrame(ImageBase <TColor, TPacked> image)
: base(image)
{
}
/// <summary>
/// Copies the properties from the other <see cref="ImageBase{TColor}"/>.
/// </summary>
/// <param name="other">
/// The other <see cref="ImageBase{TColor}"/> to copy the properties from.
/// </param>
protected void CopyProperties(ImageBase <TColor> other)
{
this.Configuration = other.Configuration;
this.Quality = other.Quality;
this.FrameDelay = other.FrameDelay;
}
/// <summary>
/// Initializes a new instance of the <see cref="ImageFrame"/> class.
/// </summary>
/// <param name="image">
/// The image to create the frame from.
/// </param>
public ImageFrame(ImageBase <Color, uint> image)
: base(image)
{
}
/// <summary>
/// Calculates the target rectangle for crop mode.
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
/// <param name="source">The source image.</param>
/// <param name="options">The resize options.</param>
/// <returns>
/// The <see cref="Rectangle"/>.
/// </returns>
private static Rectangle CalculateCropRectangle <TColor, TPacked>(ImageBase <TColor, TPacked> source, ResizeOptions options)
where TColor : struct, IPackedPixel <TPacked>
where TPacked : struct
{
int width = options.Size.Width;
int height = options.Size.Height;
if (width <= 0 || height <= 0)
{
return(new Rectangle(0, 0, source.Width, source.Height));
}
double ratio;
int sourceWidth = source.Width;
int sourceHeight = source.Height;
int destinationX = 0;
int destinationY = 0;
int destinationWidth = width;
int destinationHeight = height;
// Fractional variants for preserving aspect ratio.
double percentHeight = Math.Abs(height / (double)sourceHeight);
double percentWidth = Math.Abs(width / (double)sourceWidth);
if (percentHeight < percentWidth)
{
ratio = percentWidth;
if (options.CenterCoordinates.Any())
{
double center = -(ratio * sourceHeight) * options.CenterCoordinates.First();
destinationY = (int)center + (height / 2);
if (destinationY > 0)
{
destinationY = 0;
}
if (destinationY < (int)(height - (sourceHeight * ratio)))
{
destinationY = (int)(height - (sourceHeight * ratio));
}
}
else
{
switch (options.Position)
{
case AnchorPosition.Top:
case AnchorPosition.TopLeft:
case AnchorPosition.TopRight:
destinationY = 0;
break;
case AnchorPosition.Bottom:
case AnchorPosition.BottomLeft:
case AnchorPosition.BottomRight:
destinationY = (int)(height - (sourceHeight * ratio));
break;
default:
destinationY = (int)((height - (sourceHeight * ratio)) / 2);
break;
}
}
destinationHeight = (int)Math.Ceiling(sourceHeight * percentWidth);
}
else
{
ratio = percentHeight;
if (options.CenterCoordinates.Any())
{
double center = -(ratio * sourceWidth) * options.CenterCoordinates.ToArray()[1];
destinationX = (int)center + (width / 2);
if (destinationX > 0)
{
destinationX = 0;
}
if (destinationX < (int)(width - (sourceWidth * ratio)))
{
destinationX = (int)(width - (sourceWidth * ratio));
}
}
else
{
switch (options.Position)
{
case AnchorPosition.Left:
case AnchorPosition.TopLeft:
case AnchorPosition.BottomLeft:
destinationX = 0;
break;
case AnchorPosition.Right:
case AnchorPosition.TopRight:
case AnchorPosition.BottomRight:
destinationX = (int)(width - (sourceWidth * ratio));
break;
default:
destinationX = (int)((width - (sourceWidth * ratio)) / 2);
break;
}
}
destinationWidth = (int)Math.Ceiling(sourceWidth * percentHeight);
}
return(new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
}
/// <summary>
/// Calculates the target rectangle for box pad mode.
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
/// <param name="source">The source image.</param>
/// <param name="options">The resize options.</param>
/// <returns>
/// The <see cref="Rectangle"/>.
/// </returns>
private static Rectangle CalculateBoxPadRectangle <TColor, TPacked>(ImageBase <TColor, TPacked> source, ResizeOptions options)
where TColor : struct, IPackedPixel <TPacked>
where TPacked : struct
{
int width = options.Size.Width;
int height = options.Size.Height;
if (width <= 0 || height <= 0)
{
return(new Rectangle(0, 0, source.Width, source.Height));
}
int sourceWidth = source.Width;
int sourceHeight = source.Height;
// Fractional variants for preserving aspect ratio.
double percentHeight = Math.Abs(height / (double)sourceHeight);
double percentWidth = Math.Abs(width / (double)sourceWidth);
int boxPadHeight = height > 0 ? height : Convert.ToInt32(sourceHeight * percentWidth);
int boxPadWidth = width > 0 ? width : Convert.ToInt32(sourceWidth * percentHeight);
// Only calculate if upscaling.
if (sourceWidth < boxPadWidth && sourceHeight < boxPadHeight)
{
int destinationX;
int destinationY;
int destinationWidth = sourceWidth;
int destinationHeight = sourceHeight;
width = boxPadWidth;
height = boxPadHeight;
switch (options.Position)
{
case AnchorPosition.Left:
destinationY = (height - sourceHeight) / 2;
destinationX = 0;
break;
case AnchorPosition.Right:
destinationY = (height - sourceHeight) / 2;
destinationX = width - sourceWidth;
break;
case AnchorPosition.TopRight:
destinationY = 0;
destinationX = width - sourceWidth;
break;
case AnchorPosition.Top:
destinationY = 0;
destinationX = (width - sourceWidth) / 2;
break;
case AnchorPosition.TopLeft:
destinationY = 0;
destinationX = 0;
break;
case AnchorPosition.BottomRight:
destinationY = height - sourceHeight;
destinationX = width - sourceWidth;
break;
case AnchorPosition.Bottom:
destinationY = height - sourceHeight;
destinationX = (width - sourceWidth) / 2;
break;
case AnchorPosition.BottomLeft:
destinationY = height - sourceHeight;
destinationX = 0;
break;
default:
destinationY = (height - sourceHeight) / 2;
destinationX = (width - sourceWidth) / 2;
break;
}
return(new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
}
// Switch to pad mode to downscale and calculate from there.
return(CalculatePadRectangle(source, options));
}
/// <summary>
/// Calculates the target rectangle for pad mode.
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
/// <param name="source">The source image.</param>
/// <param name="options">The resize options.</param>
/// <returns>
/// The <see cref="Rectangle"/>.
/// </returns>
private static Rectangle CalculatePadRectangle <TColor, TPacked>(ImageBase <TColor, TPacked> source, ResizeOptions options)
where TColor : struct, IPackedPixel <TPacked>
where TPacked : struct
{
int width = options.Size.Width;
int height = options.Size.Height;
if (width <= 0 || height <= 0)
{
return(new Rectangle(0, 0, source.Width, source.Height));
}
double ratio;
int sourceWidth = source.Width;
int sourceHeight = source.Height;
int destinationX = 0;
int destinationY = 0;
int destinationWidth = width;
int destinationHeight = height;
// Fractional variants for preserving aspect ratio.
double percentHeight = Math.Abs(height / (double)sourceHeight);
double percentWidth = Math.Abs(width / (double)sourceWidth);
if (percentHeight < percentWidth)
{
ratio = percentHeight;
destinationWidth = Convert.ToInt32(sourceWidth * percentHeight);
switch (options.Position)
{
case AnchorPosition.Left:
case AnchorPosition.TopLeft:
case AnchorPosition.BottomLeft:
destinationX = 0;
break;
case AnchorPosition.Right:
case AnchorPosition.TopRight:
case AnchorPosition.BottomRight:
destinationX = (int)(width - (sourceWidth * ratio));
break;
default:
destinationX = Convert.ToInt32((width - (sourceWidth * ratio)) / 2);
break;
}
}
else
{
ratio = percentWidth;
destinationHeight = Convert.ToInt32(sourceHeight * percentWidth);
switch (options.Position)
{
case AnchorPosition.Top:
case AnchorPosition.TopLeft:
case AnchorPosition.TopRight:
destinationY = 0;
break;
case AnchorPosition.Bottom:
case AnchorPosition.BottomLeft:
case AnchorPosition.BottomRight:
destinationY = (int)(height - (sourceHeight * ratio));
break;
default:
destinationY = (int)((height - (sourceHeight * ratio)) / 2);
break;
}
}
return(new Rectangle(destinationX, destinationY, destinationWidth, destinationHeight));
}
/// <summary>
/// Combines the given image together with the current one by blending their pixels.
/// </summary>
/// <param name="source">The image this method extends.</param>
/// <param name="image">The image to blend with the currently processing image.</param>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
/// <param name="percent">The opacity of the image image to blend. Must be between 0 and 100.</param>
/// <param name="rectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
/// </param>
/// <returns>The <see cref="Image{TColor, TPacked}"/>.</returns>
public static Image <TColor, TPacked> Blend <TColor, TPacked>(this Image <TColor, TPacked> source, ImageBase <TColor, TPacked> image, int percent, Rectangle rectangle)
where TColor : struct, IPackedPixel <TPacked>
where TPacked : struct
{
return(source.Process(rectangle, new BlendProcessor <TColor, TPacked>(image, percent)));
}
/// <summary>
/// Combines the given image together with the current one by blending their pixels.
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
/// <param name="source">The image this method extends.</param>
/// <param name="image">The image to blend with the currently processing image.</param>
/// <param name="percent">The opacity of the image image to blend. Must be between 0 and 100.</param>
/// <returns>The <see cref="Image{TColor, TPacked}"/>.</returns>
public static Image <TColor, TPacked> Blend <TColor, TPacked>(this Image <TColor, TPacked> source, ImageBase <TColor, TPacked> image, int percent = 50)
where TColor : struct, IPackedPixel <TPacked>
where TPacked : struct
{
return(Blend(source, image, percent, source.Bounds));
}
