/// <summary>
/// Constructor initializes and compares pixel-by-pixel two Bitmap objects with predefined BitmapDifference object
/// </summary>
/// <param name="a">First Bitmap object (will serve as base to display differences on)</param>
/// <param name="b">Second Bitmap object which will be compared to the first</param>
/// <param name="d">Predefined BitmapDifference object (can be used to accumulate differences from multiple comparisons)</param>
public BitmapComparator(BitmapEditor a, BitmapEditor b, BitmapDifference d)
{
bitmapComparatorBitmapA = a;
bitmapComparatorBitmapB = b;
bitmapComparatorDifference = d;
Compare();
}
/// <summary>
/// Constructor initializes and compares pixel-by-pixel two Bitmap objects
/// </summary>
/// <param name="a">First Bitmap object (will serve as base to display differences on)</param>
/// <param name="b">Second Bitmap object which will be compared to the first</param>
public BitmapComparator(BitmapEditor a, BitmapEditor b)
{
bitmapComparatorBitmapA = a;
bitmapComparatorBitmapB = b;
bitmapComparatorDifference = new BitmapDifference(bitmapComparatorBitmapA);
Compare();
}
private void Compare()
{
BitmapEditor bitmapPrevious = bitmapBatch[0];
BitmapEditor bitmapCurrent;
for (int bitmapBatchIndex = 0; bitmapBatchIndex < bitmapBatch.Count; ++bitmapBatchIndex)
{
bitmapCurrent = bitmapBatch[bitmapBatchIndex];
BitmapComparator bitmapComparatorCurrent = new BitmapComparator(bitmapPrevious, bitmapCurrent, bitmapDifference);
}
}
/// <summary>
/// Generates masked image where pixels marked as masked are highlighted.
/// </summary>
/// <returns></returns>
public Bitmap GetBitmapMaskedImage()
{
// Bitmap difference is base on initial base image
BitmapEditor maskedImage = new BitmapEditor(differenceBaseImage);
// Set each Different pixel to specified difference color
for (int y = 0; y < height; ++y)
{
for (int x = 0; x < width; ++x)
{
// Pixels are different but not masked
if (differenceMask[x, y])
{
maskedImage.SetPixel(x, y, differenceMaskColor);
}
}
}
return(maskedImage);
}
/// <summary>
/// Adds information about which pixels should be ignored when marked as different. Those pixels
/// won't be counted as different in GetBitmapDifferenceMetric() and GetBitmapDifferenceImage().
/// </summary>
/// <param name="mask">Bitmap where pixels of Color.Cyan indicates which pixel should be masked.</param>
public void AddMask(BitmapEditor mask)
{
// Check Bitmap size, we can't continue if sizes doesn't correspond
if (mask.Width != width || mask.Height != height)
{
throw new Exception("Passed Bitmap has different size than initialized mask");
}
// Fill mask definition according the passed Bitmap
// (if pixel on Bitmap is of ignored color - differenceMaskColor - mark it as ignored)
for (int y = 0; y < height; ++y)
{
for (int x = 0; x < width; ++x)
{
if (mask.GetPixel(x, y) == differenceColor)
{
differenceMask[x, y] = true;
}
}
}
}