public void DrawImage(Image image, Rectangle target, Rectangle source, GraphicsUnit gu)
{
APaint.Flags = (Android.Graphics.PaintFlags) 0;
var sa = source.ToA();
var ta = target.ToA();
ACanvas.DrawBitmap((image as Bitmap).ABitmap, sa, ta, APaint);
sa.Dispose();
ta.Dispose();
}
//Negativ
private Android.Graphics.Bitmap createInverse(Android.Graphics.Bitmap src)
{
float[] colorMatrix_Negative =
{
-1.0f, 0, 0, 0, 255, //red
0, -1.0f, 0, 0, 255, //green
0, 0, -1.0f, 0, 255, //blue
0, 0, 0, 1.0f, 0 //alpha
};
Android.Graphics.Paint MyPaint_Normal = new Android.Graphics.Paint();
Android.Graphics.Paint MyPaint_Negative = new Android.Graphics.Paint();
Android.Graphics.ColorFilter colorFilter_Negative = new Android.Graphics.ColorMatrixColorFilter(colorMatrix_Negative);
MyPaint_Negative.SetColorFilter(colorFilter_Negative);
Android.Graphics.Bitmap bitmap = Android.Graphics.Bitmap.CreateBitmap(src.Width, src.Height,
Android.Graphics.Bitmap.Config.Argb8888);
Android.Graphics.Canvas canvas = new Android.Graphics.Canvas(bitmap);
MyPaint_Negative.SetColorFilter(colorFilter_Negative);
canvas.DrawBitmap(src, 0, 0, MyPaint_Negative);
return(bitmap);
return(bitmap);
}
//sepia si prietenii
private Android.Graphics.Bitmap createSepia_and_RBG(Android.Graphics.Bitmap src, int choise)
{
Android.Graphics.ColorMatrix colorMatrix_Sepia = new Android.Graphics.ColorMatrix();
colorMatrix_Sepia.SetSaturation(0);
Android.Graphics.ColorMatrix colorScale = new Android.Graphics.ColorMatrix();
if (choise == 1)
{
colorScale.SetScale(1, 1f, 0.7f, 1); //sepia
}
else
if (choise == 2)
{
colorScale.SetScale(1, 1f, 2f, 1); //albastru
}
else
if (choise == 3)
{
colorScale.SetScale(1, 2f, 1f, 1); //verde
}
else
if (choise == 4)
{
colorScale.SetScale(2f, 1, 1f, 1); //rosu
}
//0.7 sepia ch =1
//0.4 ceva verziu
//2 albastru fain
//5 albastru neon
colorMatrix_Sepia.PostConcat(colorScale);
Android.Graphics.ColorFilter ColorFilter_Sepia = new Android.Graphics.ColorMatrixColorFilter(
colorMatrix_Sepia);
Android.Graphics.Bitmap bitmap = Android.Graphics.Bitmap.CreateBitmap(src.Width, src.Height,
Android.Graphics.Bitmap.Config.Argb8888);
Android.Graphics.Canvas canvas = new Android.Graphics.Canvas(bitmap);
Android.Graphics.Paint paint = new Android.Graphics.Paint();
paint.SetColorFilter(ColorFilter_Sepia);
canvas.DrawBitmap(src, 0, 0, paint);
return(bitmap);
}
protected override void OnDraw(Android.Graphics.Canvas canvas)
{
base.OnDraw(canvas);
lock (this)
{
Image <Bgr, byte> image = _bgrBuffers.GetBuffer(0);
if (image != null && !_imageSize.IsEmpty && canvas != null)
{
Stopwatch w = Stopwatch.StartNew();
if ((_bmpImage != null) && (!_imageSize.Equals(_bmpImage.Size)))
{
_bmpImage.Dispose();
_bmpImage = null;
_bmp.Dispose();
_bmp = null;
}
if (_bmpImage == null)
{
_bmp = Android.Graphics.Bitmap.CreateBitmap(_imageSize.Width, _imageSize.Height, Android.Graphics.Bitmap.Config.Rgb565);
_bmpImage = new BitmapRgb565Image(_bmp);
}
_bmpImage.ConvertFrom(image);
canvas.DrawBitmap(_bmp, 0, 0, _paint);
w.Stop();
_watch.Stop();
#if DEBUG
canvas.DrawText(String.Format("{0:F2} FPS; {1}x{2}; Render Time: {3} ms",
1.0 / _watch.ElapsedMilliseconds * 1000,
_imageSize.Width,
_imageSize.Height,
w.ElapsedMilliseconds), 20, 20, _paint);
#endif
_watch.Reset();
_watch.Start();
}
}
}
//Gray Filter
public Android.Graphics.Bitmap toGrayscale(Android.Graphics.Bitmap bmpOriginal)
{
int width, height;
height = bmpOriginal.Height;
width = bmpOriginal.Width;
Android.Graphics.Bitmap bmpGrayscale = Android.Graphics.Bitmap.CreateBitmap(width, height, Android.Graphics.Bitmap.Config.Argb8888);
Android.Graphics.Canvas c = new Android.Graphics.Canvas(bmpGrayscale);
Android.Graphics.Paint paint = new Android.Graphics.Paint();
Android.Graphics.ColorMatrix cm = new Android.Graphics.ColorMatrix();
cm.SetSaturation(0);
Android.Graphics.ColorMatrixColorFilter f = new Android.Graphics.ColorMatrixColorFilter(cm);
paint.SetColorFilter(f);
c.DrawBitmap(bmpOriginal, 0, 0, paint);
return(bmpGrayscale);
}
