/// <summary>
/// Rotate the picture taken
/// https://forums.xamarin.com/discussion/5409/photo-being-saved-in-landscape-not-portrait
/// </summary>
/// <param name="path"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
void RotateBitmap(string path, byte[] data)
{
try
{
//using (Android.Graphics.Bitmap picture = Android.Graphics.BitmapFactory.DecodeFile(path))
using (Android.Graphics.Bitmap picture = data.ToBitmap())
using (Android.Graphics.Matrix mtx = new Android.Graphics.Matrix())
{
ExifInterface exif = new ExifInterface(path);
string orientation = exif.GetAttribute(ExifInterface.TagOrientation);
var camOrientation = int.Parse(orientation);
switch (_imageRotation)
{
case 0: // landscape
break;
case 90: // landscape upside down
mtx.PreRotate(270);
break;
case 180: // portrait
mtx.PreRotate(180);
break;
case 270: // portrait upside down
mtx.PreRotate(90);
break;
}
var maxSize = 1024;
double w = picture.Width;
double h = picture.Height;
if (picture.Width > maxSize || picture.Height > maxSize)
{
// set scaled width and height to prevent out of memory exception
double scaleFactor = (double)maxSize / (double)picture.Width;
if (picture.Height > picture.Width)
{
scaleFactor = (double)maxSize / picture.Height;
}
w = picture.Width * scaleFactor;
h = picture.Height * scaleFactor;
}
using (var scaledPiture = Android.Graphics.Bitmap.CreateScaledBitmap(picture, (int)w, (int)h, false))
using (var rotatedPiture = Android.Graphics.Bitmap.CreateBitmap(scaledPiture, 0, 0, (int)w, (int)h, mtx, false))
{
SaveFile(path, rotatedPiture.ToBytes());
}
}
}
catch (Java.Lang.OutOfMemoryError e)
{
e.PrintStackTrace();
throw;
}
}
public async void OnPictureTaken(byte[] data, Camera camera)
{
img_container.bitma_pic = Android.Graphics.BitmapFactory.DecodeByteArray(data, 0, data.Length);
string cur_time_milisec = System.DateTime.Now.Millisecond.ToString();
string cur_time_sec = System.DateTime.Now.Second.ToString();
img_container.temp_storage = new Java.IO.File(img_container.path_file, "image" + cur_time_milisec + cur_time_sec + ".jpg");
if (!img_container.temp_storage.Exists())
{
img_container.temp_storage.CreateNewFile();
}
img_container.absolut_path_pic = img_container.temp_storage.AbsolutePath;
Android.Graphics.Matrix rotation_matrix = new Android.Graphics.Matrix();
//caz ii camera spate
if (gcur_cam != gDef_front_cam)
{
rotation_matrix.PreRotate(90);
}
else //camera frontala
{
rotation_matrix.PreRotate(270);
}
img_container.bitma_pic = Android.Graphics.Bitmap.CreateBitmap(img_container.bitma_pic, 0, 0, img_container.bitma_pic.Width, img_container.bitma_pic.Height, rotation_matrix, true);
MemoryStream stream = new MemoryStream();
Android.Graphics.Bitmap bmp = img_container.bitma_pic;
bmp.Compress(Android.Graphics.Bitmap.CompressFormat.Jpeg, 100, stream);
byte[] byte_array = stream.ToArray();
FileOutputStream outstream = new FileOutputStream(img_container.temp_storage);
outstream.Write(byte_array);
outstream.Flush();
outstream.Close();
}
/// <summary>
/// Rotate via EXIF information
/// </summary>
/// <param name="photoPath"></param>
/// <returns></returns>
public byte[] RotateImage(string photoPath)
{
Android.Graphics.BitmapFactory.Options options = new Android.Graphics.BitmapFactory.Options();
options.InPreferredConfig = Android.Graphics.Bitmap.Config.Argb8888;
Android.Graphics.Bitmap bitmap = Android.Graphics.BitmapFactory.DecodeFile(photoPath, options);
try
{
Android.Media.ExifInterface exifInterface = new Android.Media.ExifInterface(photoPath);
int orientation = exifInterface.GetAttributeInt(Android.Media.ExifInterface.TagOrientation, (int)Android.Media.Orientation.Normal);
int rotate = 0;
switch (orientation)
{
case (int)Android.Media.Orientation.Normal:
rotate = 0;
break;
case (int)Android.Media.Orientation.Rotate90:
rotate = 90;
break;
case (int)Android.Media.Orientation.Rotate270:
rotate = 270;
break;
case (int)Android.Media.Orientation.Rotate180:
rotate = 180;
break;
default:
rotate = 0;
break;
}
using (var ms = new System.IO.MemoryStream())
{
Android.Graphics.Bitmap croppedBitmap = null;
Android.Graphics.Matrix mtx = new Android.Graphics.Matrix();
mtx.PreRotate(rotate);
if (bitmap.Width >= bitmap.Height)
{
croppedBitmap = Android.Graphics.Bitmap.CreateBitmap(
bitmap,
bitmap.Width / 2 - bitmap.Height / 2,
0,
bitmap.Height,
bitmap.Height,
mtx,
false);
}
else
{
croppedBitmap = Android.Graphics.Bitmap.CreateBitmap(
bitmap,
0,
bitmap.Height / 2 - bitmap.Width / 2,
bitmap.Width,
bitmap.Width,
mtx,
false);
}
croppedBitmap.Compress(Android.Graphics.Bitmap.CompressFormat.Png, 100, ms);
croppedBitmap.Recycle();
croppedBitmap.Dispose();
croppedBitmap = null;
mtx.Dispose();
mtx = null;
bitmap.Recycle();
bitmap.Dispose();
bitmap = null;
return(ms.ToArray());
}
}
catch
{
// <!-- Fail out -->
}
return(null);
}
private Android.Graphics.Bitmap LoadAndResizeBitmap(string fileName, Size newSize)
{
var exif = new ExifInterface(fileName);
var width = exif.GetAttributeInt(ExifInterface.TagImageWidth, 100);
var height = exif.GetAttributeInt(ExifInterface.TagImageLength, 80);
var orientation = exif.GetAttribute(ExifInterface.TagOrientation);
// We calculate the ratio that we need to resize the image by
// in order to fit the requested dimensions.
var inSampleSize = 1.0;
if (newSize.Height < height || newSize.Width < width)
{
inSampleSize = newSize.Width > newSize.Height
? newSize.Height / height
: newSize.Width / width;
}
var options = new Android.Graphics.BitmapFactory.Options {
InJustDecodeBounds = false,
InSampleSize = (int)inSampleSize
};
// Now we will load the image and have BitmapFactory resize it for us.
var resizedBitmap = Android.Graphics.BitmapFactory.DecodeFile(fileName, options);
var rotate = false;
switch (orientation)
{
case "1": // landscape
case "3": // landscape
if (width < height)
{
rotate = true;
}
break;
case "8":
case "4":
case "6": // portrait
if (width > height)
{
rotate = true;
}
break;
case "0": //undefined
default:
break;
}
if (rotate)
{
var mtx = new Android.Graphics.Matrix();
mtx.PreRotate(90);
resizedBitmap = Android.Graphics.Bitmap.CreateBitmap(resizedBitmap, 0, 0, resizedBitmap.Width, resizedBitmap.Height, mtx, false);
mtx.Dispose();
mtx = null;
}
return(resizedBitmap);
}
private Android.Graphics.Bitmap LoadAndResizeBitmap(string fileName, Size newSize) {
var exif = new ExifInterface(fileName);
var width = exif.GetAttributeInt(ExifInterface.TagImageWidth, 100);
var height = exif.GetAttributeInt(ExifInterface.TagImageLength, 80);
var orientation = exif.GetAttribute(ExifInterface.TagOrientation);
// We calculate the ratio that we need to resize the image by
// in order to fit the requested dimensions.
var inSampleSize = 1.0;
if (newSize.Height < height || newSize.Width < width) {
inSampleSize = newSize.Width > newSize.Height
? newSize.Height / height
: newSize.Width / width;
}
var options = new Android.Graphics.BitmapFactory.Options {
InJustDecodeBounds = false,
InSampleSize = (int)inSampleSize
};
// Now we will load the image and have BitmapFactory resize it for us.
var resizedBitmap = Android.Graphics.BitmapFactory.DecodeFile(fileName, options);
var rotate = false;
switch (orientation) {
case "1": // landscape
case "3": // landscape
if (width < height)
rotate = true;
break;
case "8":
case "4":
case "6": // portrait
if (width > height)
rotate = true;
break;
case "0": //undefined
default:
break;
}
if (rotate) {
var mtx = new Android.Graphics.Matrix();
mtx.PreRotate(90);
resizedBitmap = Android.Graphics.Bitmap.CreateBitmap(resizedBitmap, 0, 0, resizedBitmap.Width, resizedBitmap.Height, mtx, false);
mtx.Dispose();
mtx = null;
}
return resizedBitmap;
}
