/// <summary>
/// This will create a new ImageBuffer that references the same memory as the image that you took the sub image from.
/// It will modify the original main image when you draw to it.
/// </summary>
/// <param name="imageContainingSubImage"></param>
/// <param name="subImageBounds"></param>
/// <returns></returns>
public static ImageBuffer NewSubImageReference(IImageByte imageContainingSubImage, RectangleDouble subImageBounds)
{
ImageBuffer subImage = new ImageBuffer();
if (subImageBounds.Left < 0 || subImageBounds.Bottom < 0 || subImageBounds.Right > imageContainingSubImage.Width || subImageBounds.Top > imageContainingSubImage.Height ||
subImageBounds.Left >= subImageBounds.Right || subImageBounds.Bottom >= subImageBounds.Top)
{
throw new ArgumentException("The subImageBounds must be on the image and valid.");
}
int left = Math.Max(0, (int)Math.Floor(subImageBounds.Left));
int bottom = Math.Max(0, (int)Math.Floor(subImageBounds.Bottom));
int width = Math.Min(imageContainingSubImage.Width - left, (int)subImageBounds.Width);
int height = Math.Min(imageContainingSubImage.Height - bottom, (int)subImageBounds.Height);
int bufferOffsetToFirstPixel = imageContainingSubImage.GetBufferOffsetXY(left, bottom);
subImage.AttachBuffer(imageContainingSubImage.GetBuffer(), bufferOffsetToFirstPixel, width, height, imageContainingSubImage.StrideInBytes(), imageContainingSubImage.BitDepth, imageContainingSubImage.GetBytesBetweenPixelsInclusive());
subImage.SetRecieveBlender(imageContainingSubImage.GetRecieveBlender());
return(subImage);
}
/// <summary>
/// This will create a new ImageBuffer that references the same memory as the image that you took the sub image from.
/// It will modify the original main image when you draw to it.
/// </summary>
/// <param name="imageContainingSubImage"></param>
/// <param name="subImageBounds"></param>
/// <returns></returns>
public static ImageBuffer NewSubImageReference(IImageByte imageContainingSubImage, RectangleDouble subImageBounds)
{
ImageBuffer subImage = new ImageBuffer();
if (subImageBounds.Left < 0 || subImageBounds.Bottom < 0 || subImageBounds.Right > imageContainingSubImage.Width || subImageBounds.Top > imageContainingSubImage.Height
|| subImageBounds.Left >= subImageBounds.Right || subImageBounds.Bottom >= subImageBounds.Top)
{
throw new ArgumentException("The subImageBounds must be on the image and valid.");
}
int left = Math.Max(0, (int)Math.Floor(subImageBounds.Left));
int bottom = Math.Max(0, (int)Math.Floor(subImageBounds.Bottom));
int width = Math.Min(imageContainingSubImage.Width - left, (int)subImageBounds.Width);
int height = Math.Min(imageContainingSubImage.Height - bottom, (int)subImageBounds.Height);
int bufferOffsetToFirstPixel = imageContainingSubImage.GetBufferOffsetXY(left, bottom);
subImage.AttachBuffer(imageContainingSubImage.GetBuffer(), bufferOffsetToFirstPixel, width, height, imageContainingSubImage.StrideInBytes(), imageContainingSubImage.BitDepth, imageContainingSubImage.GetBytesBetweenPixelsInclusive());
subImage.SetRecieveBlender(imageContainingSubImage.GetRecieveBlender());
return subImage;
}
