internal CameraResolution GetResolution(List <CameraResolution> availableResolutions)
{
CameraResolution r = null;
var dg = CameraResolutionSelector;
if (dg != null)
{
r = dg(availableResolutions);
}
return(r);
}
public void SurfaceChanged(ISurfaceHolder holder, global::Android.Graphics.Format format, int w, int h)
{
if (camera == null)
{
return;
}
var perf = PerformanceCounter.Start();
var parameters = camera.GetParameters();
parameters.PreviewFormat = ImageFormatType.Nv21;
var availableResolutions = new List <CameraResolution>();
foreach (var sps in parameters.SupportedPreviewSizes)
{
availableResolutions.Add(new CameraResolution
{
Width = sps.Width,
Height = sps.Height
});
}
// Try and get a desired resolution from the options selector
var resolution = options.GetResolution(availableResolutions);
// If the user did not specify a resolution, let's try and find a suitable one
if (resolution == null)
{
// Loop through all supported sizes
foreach (var sps in parameters.SupportedPreviewSizes)
{
// Find one that's >= 640x360 but <= 1000x1000
// This will likely pick the *smallest* size in that range, which should be fine
if (sps.Width >= 640 && sps.Width <= 1000 && sps.Height >= 360 && sps.Height <= 1000)
{
resolution = new CameraResolution
{
Width = sps.Width,
Height = sps.Height
};
break;
}
}
}
// Google Glass requires this fix to display the camera output correctly
if (Build.Model.Contains("Glass"))
{
resolution = new CameraResolution
{
Width = 640,
Height = 360
};
// Glass requires 30fps
parameters.SetPreviewFpsRange(30000, 30000);
}
// Hopefully a resolution was selected at some point
if (resolution != null)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Selected Resolution: " + resolution.Width + "x" + resolution.Height);
parameters.SetPreviewSize(resolution.Width, resolution.Height);
}
camera.SetParameters(parameters);
SetCameraDisplayOrientation(this.activity);
camera.StartPreview();
//cameraResolution = new Size(parameters.PreviewSize.Width, parameters.PreviewSize.Height);
PerformanceCounter.Stop(perf, "SurfaceChanged took {0}ms");
AutoFocus();
}
