private void ConfigureTransform(int viewWidth, int viewHeight)
{
if (_viewSurface == null || _previewSize == null || _context == null)
{
return;
}
var windowManager = _context.GetSystemService(Context.WindowService).JavaCast <IWindowManager>();
var rotation = windowManager.DefaultDisplay.Rotation;
var matrix = new Matrix();
var viewRect = new RectF(0, 0, viewWidth, viewHeight);
var bufferRect = new RectF(0, 0, _previewSize.Width, _previewSize.Height);
var centerX = viewRect.CenterX();
var centerY = viewRect.CenterY();
if (rotation == SurfaceOrientation.Rotation90 || rotation == SurfaceOrientation.Rotation270)
{
bufferRect.Offset(centerX - bufferRect.CenterX(), centerY - bufferRect.CenterY());
matrix.SetRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.Fill);
matrix.PostRotate(90 * ((int)rotation - 2), centerX, centerY);
}
_cameraTexture.SetTransform(matrix);
}
// *
// * Sets the TextureView transform to preserve the aspect ratio of the video.
//
private void AdjustAspectRatio(int videoWidth, int videoHeight)
{
int viewWidth = mTextureView.Width;
int viewHeight = mTextureView.Height;
double aspectRatio = (double)videoHeight / videoWidth;
int newWidth, newHeight;
if (viewHeight > (int)(viewWidth * aspectRatio))
{
// limited by narrow width; restrict height
newWidth = viewWidth;
newHeight = (int)(viewWidth * aspectRatio);
}
else
{
// limited by short height; restrict width
newWidth = (int)(viewHeight / aspectRatio);
newHeight = viewHeight;
}
int xoff = (viewWidth - newWidth) / 2;
int yoff = (viewHeight - newHeight) / 2;
Log.Verbose(TAG, "video=" + videoWidth + "x" + videoHeight + " view=" + viewWidth + "x" + viewHeight + " newView=" + newWidth + "x" + newHeight + " off=" + xoff + "," + yoff);
Matrix txform = new Matrix();
mTextureView.GetTransform(txform);
txform.SetScale((float)newWidth / viewWidth, (float)newHeight / viewHeight);
//txform.postRotate(10); // just for fun
txform.PostTranslate(xoff, yoff);
mTextureView.SetTransform(txform);
}
/// <summary>
/// Configures the necessary Matrix transformation to TextureView.
/// This method should be called after the camera preview size is determined in
/// SetUpCameraOutputs and also the size of TextureView is fixed.
/// </summary>
/// <param name="viewWidth"></param>
/// <param name="viewHeight"></param>
public void ConfigureTransform(int viewWidth, int viewHeight)
{
var activity = Activity;
if (null == TextureView || null == mPreviewSize || null == activity)
{
return;
}
var rotation = (int)activity.WindowManager.DefaultDisplay.Rotation;
Matrix matrix = new Matrix();
RectF viewRect = new RectF(0, 0, viewWidth, viewHeight);
RectF bufferRect = new RectF(0, 0, mPreviewSize.Height, mPreviewSize.Width);
float centerX = viewRect.CenterX();
float centerY = viewRect.CenterY();
if ((int)SurfaceOrientation.Rotation90 == rotation || (int)SurfaceOrientation.Rotation270 == rotation)
{
bufferRect.Offset(centerX - bufferRect.CenterX(), centerY - bufferRect.CenterY());
matrix.SetRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.Fill);
float scale = System.Math.Max(
(float)viewHeight / mPreviewSize.Height,
(float)viewWidth / mPreviewSize.Width);
matrix.PostScale(scale, scale, centerX, centerY);
matrix.PostRotate(90 * (rotation - 2), centerX, centerY);
}
else if ((int)SurfaceOrientation.Rotation180 == rotation)
{
matrix.PostRotate(180, centerX, centerY);
}
TextureView.SetTransform(matrix);
}
private void configureTransform(int viewWidth, int viewHeight)
{
if (null == textureView || null == previewSize || null == context)
{
return;
}
int rotation = orientation;
RectF viewRect = new RectF(0, 0, viewWidth, viewHeight);
RectF bufferRect = new RectF(0, 0, previewSize.Height, previewSize.Width);
float centerX = viewRect.CenterX();
float centerY = viewRect.CenterY();
//if ( Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation)
//{
// bufferRect.Offset(centerX - bufferRect.CenterX(), centerY - bufferRect.CenterY());
// matrix.SetRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.Fill);
// float scale = Java.Lang.Math.Max(
// (float)viewHeight / previewSize.Height,
// (float)viewWidth / previewSize.Width);
// matrix.PostScale(scale, scale, centerX, centerY);
// matrix.PostRotate(90 * (rotation - 2), centerX, centerY);
//}
//else if (Surface.ROTATION_180 == rotation)
//{
// matrix.PostRotate(180, centerX, centerY);
//}
textureView.SetTransform(matrix);
}
public void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
var viewSurface = surface;
var windowManager = Context.GetSystemService(Context.WindowService).JavaCast <IWindowManager>();
var rotation = windowManager.DefaultDisplay.Rotation;
var matrix = new Matrix();
var viewRect = new RectF(0, 0, width, height);
var bufferRect = new RectF(0, 0, previewSize.Width, previewSize.Height);
var centerX = viewRect.CenterX();
var centerY = viewRect.CenterY();
if (rotation == SurfaceOrientation.Rotation90 || rotation == SurfaceOrientation.Rotation270)
{
bufferRect.Offset(centerX - bufferRect.CenterX(), centerY - bufferRect.CenterY());
matrix.SetRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.Fill);
matrix.PostRotate(90 * ((int)rotation - 2), centerX, centerY);
}
liveTextureView.SetTransform(matrix);
//camera = Android.Hardware.Camera.Open();
//var parameters = camera.GetParameters();
//var aspect = ((decimal)height) / ((decimal)width);
//// Find the preview aspect ratio that is closest to the surface aspect
//var previewSize = parameters.SupportedPreviewSizes
// .OrderBy(s => Math.Abs(s.Width / (decimal)s.Height - aspect))
// .First();
//System.Diagnostics.Debug.WriteLine($"Preview sizes: {parameters.SupportedPreviewSizes.Count}");
//parameters.SetPreviewSize(previewSize.Width, previewSize.Height);
//camera.SetParameters(parameters);
//camera.SetPreviewTexture(surface);
//StartCamera();
}