private static BitmapSource Convert(BitmapSource bitmapSource)
{
// bitmapSource = ImageUtility.ConvertToBgra32Format(bitmapSource);
int pixelWidth, pixelHeight, stride;
byte[] pixelsData = ImageUtility.GetBitmapSourcePixelsData(bitmapSource, out pixelWidth, out pixelHeight, out stride);
for (int x = 0; x < pixelWidth; x++)
{
for (int y = 0; y < pixelHeight; y++)
{
byte alpha, blue, green, red;
PixelUtility.GetPixelBgra(pixelsData, x, y, stride, out blue, out green, out red, out alpha);
if (blue == 255 && green == 255 && red == 255)
{
PixelUtility.SetPixelBgra(pixelsData, x, y, stride, 0, 0, 0, 0);
continue;
}
if (alpha < 255 || blue == 255 || green == 255 || red == 255)
{
PixelUtility.SetPixelBgra(pixelsData, x, y, stride, blue, green, red, alpha);
continue;
}
// blue:255 alpha:blue
// green:255 alpha:green
// red:255 alpha:red
byte averageValue = (byte)((blue + green + red) / 3);
byte newAlpha = (byte)(255 - averageValue);
byte newBlue = (byte)0;
byte newGreen = (byte)0;
byte newRed = (byte)0;
PixelUtility.SetPixelBgra(pixelsData, x, y, stride, newBlue, newGreen, newRed, newAlpha);
}
}
WriteableBitmap writeableBitmap = new WriteableBitmap(bitmapSource);
writeableBitmap.WritePixels(
new Int32Rect(0, 0, pixelWidth, pixelHeight),
pixelsData, stride, 0);
return(writeableBitmap);
}
public static BitmapSource TransferPixels(BitmapSource bitmapSource, Color from, Color to, bool isForPng = false)
{
if (isForPng)
{
bitmapSource = ConvertToBgra32Format(bitmapSource);
}
int pixelWidth, pixelHeight, stride;
byte[] pixelsData = GetBitmapSourcePixelsData(bitmapSource, out pixelWidth, out pixelHeight, out stride);
for (int x = 0; x < pixelWidth; x++)
{
for (int y = 0; y < pixelHeight; y++)
{
byte alpah, blue, green, red;
if (isForPng)
{
PixelUtility.GetPixelBgra(pixelsData, x, y, stride, out blue, out green, out red, out alpah);
if (blue == from.B && green == from.G && red == from.R)
{
PixelUtility.SetPixelBgra(pixelsData, x, y, stride, to.B, to.G, to.R, to.A);
}
}
else
{
PixelUtility.GetPixelBgr(pixelsData, x, y, stride, out blue, out green, out red);
if (blue == from.B && green == from.G && red == from.R)
{
PixelUtility.SetPixelBgr(pixelsData, x, y, stride, to.B, to.G, to.R);
}
}
}
}
WriteableBitmap writeableBitmap = new WriteableBitmap(bitmapSource);
writeableBitmap.WritePixels(
new Int32Rect(0, 0, pixelWidth, pixelHeight),
pixelsData, stride, 0);
return(writeableBitmap);
}