private static void Validate <TPixelType>(this Image <TPixelType> image, int x, int y, int width, int height)
{
if (!GeometricUtils.SectionsCommon(x, x + width, 0, image.Width) ||
!GeometricUtils.SectionsCommon(y, y + height, 0, image.Height))
{
throw new ArgumentException("Cropped area has no common part with given image");
}
}
private static void Validate <TPixelType>(Image <TPixelType> image, Image <TPixelType> imageToInsert, int x, int y)
{
if (!GeometricUtils.SectionsCommon(x, x + imageToInsert.Width, 0, image.Width) ||
!GeometricUtils.SectionsCommon(y, y + imageToInsert.Height, 0, image.Height))
{
throw new ArgumentException("Inserted image has no common part with given image");
}
}
public static Image <TPixelType> Insert <TPixelType>(this Image <TPixelType> image, Image <TPixelType> imageToInsert, int x, int y)
{
Validate(image, imageToInsert, x, y);
GeometricUtils.SectionsCommon(x, x + imageToInsert.Width, 0, image.Width, out int w0, out int w1);
GeometricUtils.SectionsCommon(y, y + imageToInsert.Height, 0, image.Height, out int h0, out int h1);
int commonWidth = w1 - w0;
int commonHeight = h1 - h0;
image.ForBlock(w0, h0, commonWidth, commonHeight, (i, j) =>
{
var pixel = imageToInsert.Get(i - x, j - y);
image.Set(i, j, pixel);
});
return(image);
}
public static Image <TPixelType> Crop <TPixelType>(this Image <TPixelType> image, int x, int y, int width, int height)
{
Validate(image, x, y, width, height);
GeometricUtils.SectionsCommon(x, x + width, 0, image.Width, out int w0, out int w1);
GeometricUtils.SectionsCommon(y, y + height, 0, image.Height, out int h0, out int h1);
var newWidth = w1 - w0;
var newHeight = h1 - h0;
var originalImage = image.Copy();
image.Initialize(newWidth, newHeight);
image.ForEach((i, j) =>
{
var pixel = originalImage.Get(w0 + i, h0 + j);
image.Set(i, j, pixel);
});
return(image);
}
