void HAL.Pixel(float x, float y, float r, float g, float b)
{
var x1 = Clamp(x, frameWidth);
var y1 = Clamp(y, frameHeight);
int r1 = Clamp(r, 256);
int g1 = Clamp(g, 256);
int b1 = Clamp(b, 256);
paint.setColor((0xFF << 24) | (r1 << 16) | (g1 << 8) | b1);
frameCanvas.drawPoint(x1, y1, paint);
int Clamp(float a, int b) => System.Math.Min(System.Math.Max((int)(a * b), 0), b - 1);
}
protected internal override void onDraw(Canvas canvas)
{
if (mFaces != null && mZoomRect != null)
{
// Prepare matrix
mMatrix.reset();
mAspectRatio.reset();
mActualRect.set(0, 0, mPreviewSize.Width, mPreviewSize.Height);
// First apply zoom (crop) rect.
// Unlike the documentation, many device does not report final crop region.
// So, here we calculate final crop region which takes account aspect ratio between crop region and preview size.
{
mRevisionZoomRect.set(mZoomRect);
float left = mRevisionZoomRect.left;
float top = mRevisionZoomRect.top;
mRevisionZoomRect.offsetTo(0, 0);
mAspectRatio.setRectToRect(mActualRect, mRevisionZoomRect, Matrix.ScaleToFit.CENTER);
mAspectRatio.mapRect(mActualRect);
mActualRect.offset(left, top);
}
mMatrix.postTranslate(-mActualRect.centerX(), -mActualRect.centerY());
// compensate mirror
mMatrix.postScale(mFacing == SCameraCharacteristics.LENS_FACING_FRONT ? -1 : 1, 1);
// Then rotate and scale to UI size
mMatrix.postRotate(mRotation);
if (mOrientation == Configuration.ORIENTATION_LANDSCAPE)
{
mMatrix.postScale((float)Width / mActualRect.width(), (float)Height / mActualRect.height());
}
else
{
mMatrix.postScale((float)Height / mActualRect.width(), (float)Width / mActualRect.height());
}
mMatrix.postTranslate((float)Width / 2, (float)Height / 2);
foreach (Face face in mFaces)
{
mBoundRect.set(face.Bounds);
mMatrix.mapRect(mBoundRect);
mPaint.Color = Color.BLUE;
mPaint.StrokeWidth = 3;
canvas.drawRect(mBoundRect, mPaint);
{ // Additional features may not supported.
float[] point = new float[2];
mPaint.Color = Color.RED;
mPaint.StrokeWidth = 10;
if (face.LeftEyePosition != null)
{
mMatrix.mapPoints(point, new float[] { face.LeftEyePosition.x, face.LeftEyePosition.y });
canvas.drawPoint(point[0], point[1], mPaint);
}
if (face.RightEyePosition != null)
{
mMatrix.mapPoints(point, new float[] { face.RightEyePosition.x, face.RightEyePosition.y });
canvas.drawPoint(point[0], point[1], mPaint);
}
if (face.MouthPosition != null)
{
mMatrix.mapPoints(point, new float[] { face.MouthPosition.x, face.MouthPosition.y });
canvas.drawPoint(point[0], point[1], mPaint);
}
mPaint.Color = Color.YELLOW;
mPaint.StrokeWidth = 3;
mPaint.TextSize = 30;
if (face.Id != Face.ID_UNSUPPORTED)
{
canvas.drawText(string.Format("ID:{0:D}, Score:{1:D}", face.Id, face.Score), mBoundRect.left, mBoundRect.top, mPaint);
}
else
{
canvas.drawText(string.Format("Score:{0:D}", face.Score), mBoundRect.left, mBoundRect.top, mPaint);
}
}
}
}
}
protected internal override void onDraw(Canvas canvas)
{
if (mFaces != null && mZoomRect != null)
{
// Prepare matrix
mMatrix.reset();
mAspectRatio.reset();
mActualRect.set(0, 0, mPreviewSize.Width, mPreviewSize.Height);
// First apply zoom (crop) rect.
// Unlike the documentation, many device does not report final crop region.
// So, here we calculate final crop region which takes account aspect ratio between crop region and preview size.
{
mRevisionZoomRect.set(mZoomRect);
float left = mRevisionZoomRect.left;
float top = mRevisionZoomRect.top;
mRevisionZoomRect.offsetTo(0, 0);
mAspectRatio.setRectToRect(mActualRect, mRevisionZoomRect, Matrix.ScaleToFit.CENTER);
mAspectRatio.mapRect(mActualRect);
mActualRect.offset(left, top);
}
mMatrix.postTranslate(-mActualRect.centerX(), -mActualRect.centerY());
// compensate mirror
mMatrix.postScale(mFacing == SCameraCharacteristics.LENS_FACING_FRONT ? - 1 : 1, 1);
// Then rotate and scale to UI size
mMatrix.postRotate(mRotation);
if (mOrientation == Configuration.ORIENTATION_LANDSCAPE)
{
mMatrix.postScale((float) Width / mActualRect.width(), (float) Height / mActualRect.height());
}
else
{
mMatrix.postScale((float) Height / mActualRect.width(), (float) Width / mActualRect.height());
}
mMatrix.postTranslate((float)Width / 2, (float)Height / 2);
foreach (Face face in mFaces)
{
mBoundRect.set(face.Bounds);
mMatrix.mapRect(mBoundRect);
mPaint.Color = Color.BLUE;
mPaint.StrokeWidth = 3;
canvas.drawRect(mBoundRect, mPaint);
{ // Additional features may not supported.
float[] point = new float[2];
mPaint.Color = Color.RED;
mPaint.StrokeWidth = 10;
if (face.LeftEyePosition != null)
{
mMatrix.mapPoints(point, new float[]{face.LeftEyePosition.x, face.LeftEyePosition.y});
canvas.drawPoint(point[0], point[1], mPaint);
}
if (face.RightEyePosition != null)
{
mMatrix.mapPoints(point, new float[]{face.RightEyePosition.x, face.RightEyePosition.y});
canvas.drawPoint(point[0], point[1], mPaint);
}
if (face.MouthPosition != null)
{
mMatrix.mapPoints(point, new float[]{face.MouthPosition.x, face.MouthPosition.y});
canvas.drawPoint(point[0], point[1], mPaint);
}
mPaint.Color = Color.YELLOW;
mPaint.StrokeWidth = 3;
mPaint.TextSize = 30;
if (face.Id != Face.ID_UNSUPPORTED)
{
canvas.drawText(string.Format("ID:{0:D}, Score:{1:D}", face.Id, face.Score), mBoundRect.left, mBoundRect.top, mPaint);
}
else
{
canvas.drawText(string.Format("Score:{0:D}", face.Score), mBoundRect.left, mBoundRect.top, mPaint);
}
}
}
}
}