private static byte[] CreateMapSynchronized(IPRecord record, int zoomLevel, int desiredWidth, int desiredHeight, string mapFile)
{
byte[] sourceMapCompressed = File.ReadAllBytes("maps/" + mapFile);
byte[] rgb = JpegCodec.Decode(sourceMapCompressed, out int w, out int h);
RGBImage image = new RGBImage(rgb, w, h, rgb.Length / h);
// Mark the image at the location of the IPRecord
TileSystem.LatLongToPixelXY(record.latitude, record.longitude, zoomLevel, out int pixelX, out int pixelY);
Color color = Color.Red;
image.SetPixel(pixelX, pixelY, color);
for (int i = 1; i < 8; i++)
{
image.SetPixel(pixelX + i, pixelY, color);
image.SetPixel(pixelX - i, pixelY, color);
image.SetPixel(pixelX, pixelY + i, color);
image.SetPixel(pixelX, pixelY - i, color);
}
// Crop to desired size
image = image.SubImage(pixelX - (desiredWidth / 2), pixelY - (desiredHeight / 2), desiredWidth, desiredHeight);
byte[] jpegData = JpegCodec.Encode(image.rgb, image.width, image.height, 90);
return(jpegData);
}
public RGBImage SubImage(int startX, int startY, int w, int h)
{
if (w > width || h > height || (w == width && h == height))
{
return(this);
}
int newStride = (w * 3) + (w % 4);
RGBImage sub = new RGBImage(new byte[newStride * h], w, h, newStride);
int endX = startX + w;
int endY = startY + h;
for (int srcY = startY, subY = 0; srcY < endY; srcY++, subY++)
{
for (int srcX = startX, subX = 0; srcX < endX; srcX++, subX++)
{
sub.SetPixel(subX, subY, GetPixel(srcX, srcY));
}
}
return(sub);
}