public static void InvertColorOfPixel(this BitmapImage img, int x, int y)
{
var color = img.GetPixel(x, y);
var invertedColor = Color.FromBytes((byte)(255 * (1.0 - color.Red)), (byte)(255 * (1.0 - color.Green)), (byte)(255 * (1.0 - color.Blue)));
img.SetPixel(x, y, invertedColor);
}
public static void Copy(this BitmapImage bmp, byte[] frame)
{
var backend = bmp.GetBackend();
#if PLATFORM_WINDOWS
var pixelFormat = PixelFormats.Bgra32;
var stride = (int)bmp.PixelWidth * (pixelFormat.BitsPerPixel / 8); // width * pixel size in bytes
var dpi = 96; // dots per inch - WPF supports automatic scaling
// by using the device independent pixel as its primary unit of measurement,
// which is 1/96 of an inch
((WpfImage)backend).MainFrame = BitmapSource.Create((int)bmp.PixelWidth, (int)bmp.PixelHeight, dpi, dpi, pixelFormat, BitmapPalettes.WebPalette, frame, stride);
#else
var outBuffer = ((GtkImage)backend).Frames[0].Pixbuf.Pixels;
Marshal.Copy(frame, 0, outBuffer, frame.Length);
#endif
}
public static void DrawCursor(this BitmapImage img, int x, int y)
{
const int CursorLength = 2;
for (var rx = -1 * CursorLength; rx <= CursorLength; rx++)
{
if (img.IsInImage(x + rx, y))
{
img.InvertColorOfPixel(x + rx, y);
}
}
for (var ry = -1 * CursorLength; ry <= CursorLength; ry++)
{
if (img.IsInImage(x, y + ry) && ry != 0)
{
img.InvertColorOfPixel(x, y + ry);
}
}
}
public static bool IsInImage(this BitmapImage img, int x, int y)
{
return(x >= 0 && x < img.PixelWidth && y >= 0 && y < img.PixelHeight);
}