private static bool BmpSourceFitsBmpTarget(Bmp bmpSource, int xSource, int ySource, Bmp bmpTarget, int minPixelsToMatch, int maxPixelsToMismatch, int maxColorError)
{
if (xSource + bmpTarget.Width > bmpSource.Width || ySource + bmpTarget.Height > bmpSource.Height)
{
return(false);
}
int transparent = 0, pixelsMatched = 0, pixelsMismatched = 0;
for (int yTarget = 0; yTarget < bmpTarget.Height; yTarget++)
{
for (int xTarget = 0; xTarget < bmpTarget.Width; xTarget++)
{
int colorSourceR = bmpSource.GetPixelR(xSource + xTarget, ySource + yTarget);
int colorSourceG = bmpSource.GetPixelG(xSource + xTarget, ySource + yTarget);
int colorSourceB = bmpSource.GetPixelB(xSource + xTarget, ySource + yTarget);
int colorTargetA = bmpTarget.GetPixelA(xTarget, yTarget);
int colorTargetR = bmpTarget.GetPixelR(xTarget, yTarget);
int colorTargetG = bmpTarget.GetPixelG(xTarget, yTarget);
int colorTargetB = bmpTarget.GetPixelB(xTarget, yTarget);
if (colorTargetA == 0)
{
transparent++;
}
else if (colorSourceR - maxColorError <= colorTargetR && colorSourceR + maxColorError >= colorTargetR &&
colorSourceG - maxColorError <= colorTargetG && colorSourceG + maxColorError >= colorTargetG &&
colorSourceB - maxColorError <= colorTargetB && colorSourceB + maxColorError >= colorTargetB)
{
pixelsMatched++;
}
else
{
pixelsMismatched++;
}
if (pixelsMismatched > maxPixelsToMismatch)
{
return(false);
}
if (pixelsMatched + transparent >= minPixelsToMatch)
{
return(true);
}
}
}
return(false);
}