I am using the Windows Phone CameraCaptureTask
to gather an image, and then resize it for better use within my application. For some reason, no matter what I've tried I cannot get the image to resize.
MainPage.xaml.cs
private void cameraTask_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
BitmapImage bmi = new BitmapImage();
bmi.SetSource(e.ChosenPhoto);
//MessageBox.Show(bmi.PixelWidth.ToString() + "x" + bmi.PixelHeight.ToString());
var gcd = GCD(bmi.PixelWidth, bmi.PixelHeight);
var result = string.Format("{0}:{1}", bmi.PixelWidth / gcd, bmi.PixelHeight / gcd);
WriteableBitmap wb = new WriteableBitmap(bmi);
//WriteableBitmap wb;
//Stream stream = new MemoryStream();
var stream = new MemoryStream();
switch (result)
{
case "3:4":
//wb = new WriteableBitmap(480, 640);
//wb.SetSource(e.ChosenPhoto);
wb.SaveJpeg(stream, 480, 640, 0, 100);
break;
case "4:3":
//wb = new WriteableBitmap(640, 480);
//wb.SetSource(e.ChosenPhoto);
wb.SaveJpeg(stream, 640, 480, 0, 100);
break;
case "9:16":
//wb = new WriteableBitmap(448, 800);
//wb.SetSource(e.ChosenPhoto);
wb.SaveJpeg(stream, 448, 800, 0, 100);
break;
case "16:9":
//wb = new WriteableBitmap(800, 448);
//wb.SetSource(e.ChosenPhoto);
wb.SaveJpeg(stream, 800, 448, 0, 100);
break;
default:
wb = null;
return;
}
stream.Seek(0, SeekOrigin.Begin);
//stream.Dispose();
MessageBox.Show(wb.PixelWidth.ToString() + " x " + wb.PixelHeight.ToString());
var capturedPicture = new CapturedPicture(e.OriginalFileName, stream);
}
}
public int GCD(int a, int b)
{
while (a != 0 && b != 0)
{
if (a > b)
a %= b;
else
b %= a;
}
if (a == 0)
return b;
else
return a;
}
No matter what I do, setting the WriteableBitmap
to either e.ChosenPhoto
or bmi
forces the resulting wb
to be the original size. Any ideas?
尝试使用WriteableBitmapExWinPhone.dll
wb = wb.Resize(Convert.ToInt32(pass value of width here), Convert.ToInt32(pass value of height here), WriteableBitmapExtensions.Interpolation.Bilinear);
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