public async Task <string> ConvertImage(string imagenFilePath, int quality, FormatoImagen formatoImagen)
{
if (string.IsNullOrWhiteSpace(imagenFilePath))
{
throw new ArgumentNullException("File path de la imagen a convertir esta vacio!.");
}
if (formatoImagen == FormatoImagen.SinTipoFormato)
{
throw new ArgumentNullException("Formato de imagen invalido!.");
}
string uniqueID = UUID.RandomUUID().ToString();
using (Java.IO.File path = BaseAndroid.OS.Environment.GetExternalStoragePublicDirectory(BaseAndroid.OS.Environment.DirectoryPictures))
using (Java.IO.File file = new Java.IO.File(path, uniqueID + ".jpg"))
using (FileStream fileOutputStream = new FileStream(file.AbsolutePath, FileMode.CreateNew))
{
Bitmap imageToConvert = await BitmapFactory.DecodeFileAsync(imagenFilePath);
Bitmap.CompressFormat compressFormat = null;
if (formatoImagen == FormatoImagen.Jpeg)
{
compressFormat = Bitmap.CompressFormat.Jpeg;
}
else if (formatoImagen == FormatoImagen.Png)
{
compressFormat = Bitmap.CompressFormat.Png;
}
await imageToConvert.CompressAsync(compressFormat, quality, fileOutputStream);
await fileOutputStream.FlushAsync();
fileOutputStream.Close();
fileOutputStream.Dispose();
return(file.AbsolutePath);
}
}
public static Bitmap ObtenerBitmapDeImageControl(System.Windows.Controls.Image controlImage, FormatoImagen formato)
{
if (!(Boolean)controlImage.DataContext)
{
return(null);
}
if (formato == FormatoImagen.JPEG)
{
return(ImageSourceABitmap(controlImage.Source, ImageFormat.Jpeg));
}
else if (formato == FormatoImagen.PNG)
{
return(ImageSourceABitmap(controlImage.Source, ImageFormat.Png));
}
return(null);
}
public Task DeleteTransparencyFromAnImage(string imagenFilePath, int quality, FormatoImagen formatoImagen)
{
throw new NotImplementedException();
}
public Task <string> ConvertImage(string imagenFilePath, int quality, FormatoImagen formatoImagen)
{
throw new NotImplementedException();
}
public async Task DeleteTransparencyFromAnImage(string imagenFilePath, int quality, FormatoImagen formatoImagen)
{
if (string.IsNullOrWhiteSpace(imagenFilePath))
{
throw new ArgumentNullException("File path de la imagen a convertir esta vacio!.");
}
if (formatoImagen == FormatoImagen.SinTipoFormato)
{
throw new ArgumentNullException("Formato de imagen invalido!.");
}
Bitmap sourceBitmap = await BitmapFactory.DecodeFileAsync(imagenFilePath);
int minX = sourceBitmap.Width;
int minY = sourceBitmap.Height;
int maxX = -1;
int maxY = -1;
for (int y = 0; y < sourceBitmap.Height; y++)
{
for (int x = 0; x < sourceBitmap.Width; x++)
{
int alpha = (sourceBitmap.GetPixel(x, y) >> 24) & 255;
if (alpha > 0) // pixel is not 100% transparent
{
if (x < minX)
{
minX = x;
}
if (x > maxX)
{
maxX = x;
}
if (y < minY)
{
minY = y;
}
if (y > maxY)
{
maxY = y;
}
}
}
}
if ((maxX < minX) || (maxY < minY))
{
return; // Bitmap is entirely transparent
}
// crop bitmap to non-transparent area and return:
Bitmap bitmapWithoutTransparency = Bitmap.CreateBitmap(sourceBitmap, minX, minY, (maxX - minX) + 1, (maxY - minY) + 1);
using (var stream = new FileStream(imagenFilePath, FileMode.Create))
{
Bitmap.CompressFormat compressFormat = null;
if (formatoImagen == FormatoImagen.Jpeg)
{
compressFormat = Bitmap.CompressFormat.Jpeg;
}
else if (formatoImagen == FormatoImagen.Png)
{
compressFormat = Bitmap.CompressFormat.Png;
}
await bitmapWithoutTransparency.CompressAsync(compressFormat, quality, stream);
stream.Close();
}
}
