/// <summary>
/// process the given image file
/// </summary>
/// <param name="filename">
/// filename of the image to process <see cref="System.String"/>
/// </param>
/// <param name="edges_filename">
/// filename to save edges image <see cref="System.String"/>
/// </param>
public void Update(string filename, string edges_filename)
{
if (File.Exists(filename))
{
Bitmap bmp = (Bitmap)Bitmap.FromFile(filename);
byte[] img = new byte[bmp.Width * bmp.Height * 3];
BitmapArrayConversions.updatebitmap(bmp, img);
Update(img, bmp.Width, bmp.Height);
Bitmap edges_bmp = new Bitmap(bmp.Width, bmp.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
BitmapArrayConversions.updatebitmap_unsafe(edgesImage, edges_bmp);
if (edges_filename.ToLower().EndsWith("jpg"))
{
edges_bmp.Save(edges_filename, System.Drawing.Imaging.ImageFormat.Jpeg);
}
if (edges_filename.ToLower().EndsWith("bmp"))
{
edges_bmp.Save(edges_filename, System.Drawing.Imaging.ImageFormat.Bmp);
}
}
}
/// <summary>
/// add some text to the given image
/// </summary>
/// <param name="img">colour image into which to insert th text</param>
/// <param name="img_width">width of the image</param>
/// <param name="img_height">height of the image</param>
/// <param name="text">text to be added</param>
/// <param name="font">font style</param>
/// <param name="font_size">font size</param>
/// <param name="r">red</param>
/// <param name="g">green</param>
/// <param name="b">blue</param>
/// <param name="position_x">x coordinate at which to insert the text</param>
/// <param name="position_y">y coordinate at which to insert the text</param>
public static void AddText(byte[] img, int img_width, int img_height,
string text,
string font, int font_size,
int r, int g, int b,
float position_x, float position_y)
{
Bitmap screen_bmp = new Bitmap(img_width, img_height,
System.Drawing.Imaging.PixelFormat.Format24bppRgb);
// insert the existing image into the bitmap
BitmapArrayConversions.updatebitmap_unsafe(img, screen_bmp);
Font drawFont = new Font(font, font_size);
SolidBrush drawBrush = new SolidBrush(Color.FromArgb(r, g, b));
Graphics grph = Graphics.FromImage(screen_bmp);
grph.DrawString(text, drawFont, drawBrush, position_x, position_y);
grph.Dispose();
// extract the bitmap data
BitmapArrayConversions.updatebitmap(screen_bmp, img);
}