/// <param name="componentSize">Component size</param>
/// <param name="width">Image width</param>
/// <param name="height">Image height</param>
/// <param name="pixels">
/// Pixels are represented as a 2D array. The first dimension represents
/// the component type size and the second dimension contains pixel data.
/// Note that the first element of the second dimension (intensity value)
/// is XY(0,0) which is bottom left of the image not top left.
/// </param>
public SFImage(
SFImageComponentSize componentSize,
int width,
int height,
byte[,] pixels)
{
this.UpdateImage(componentSize, width, height, pixels);
}
public void UpdateImage(
SFImageComponentSize componentSize,
int width,
int height,
byte[,] pixels)
{
ValidateImage(componentSize, width, height, pixels);
this.ComponentSize = componentSize;
this.Width = width;
this.Height = height;
this.Pixels = pixels;
}
private static void ValidateImage(
SFImageComponentSize componentSize,
int width,
int height,
byte[,] pixels)
{
if (componentSize == SFImageComponentSize.Unknown)
{
if (pixels != null)
{
// Validation 1. When component is unknown, pixel should
// not have any elements in it.
throw new ArgumentException(string.Format("Component type and pixel data are mismatched. Component Format = {0} and Pixel Format = {1}", (int)componentSize, pixels.GetLength(0)));
}
}
else
{
if (pixels == null)
{
// Validation 2. When component is specified, pixel
// should not be NULL.
throw new ArgumentException(string.Format("Component type and pixel data are mismatched. Component Format = {0} and Pixel Format = NULL", (int)componentSize));
}
if ((int)componentSize != pixels.GetLength(0))
{
// Validation 3. When component is known, component
// size and 1D size must be matched.
throw new ArgumentException(string.Format("Component type and pixel data are mismatched. Component Format = {0} and Pixel Format = {1}", (int)componentSize, pixels.GetLength(0)));
}
if (width * height != pixels.GetLength(1))
{
// Validation 4. When component is known,
// width x height and 2D size must be matched.
throw new ArgumentException(string.Format("Image size and pixel data size are mismatched. Component Format = {0} and Pixel Format = {1}", (int)componentSize, pixels.GetLength(0)));
}
}
}
private static SFImage GenerateTestImage(SFImageComponentSize size)
{
if (size == SFImageComponentSize.Unknown)
{
return(new SFImage());
}
const int width = 100;
const int height = 100;
var components = (int)size;
var pixels = new byte[components, (width * height)];
for (var component = 0; component < components; component++)
{
for (var pos = 0; pos < (width * height); pos++)
{
pixels[component, pos] = (byte)(pos % 255);
}
}
return(new SFImage(size, width, height, pixels));
}
