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(); }