protected internal override void onResize(float w, float h)
{
base.onResize(w, h);
android.graphics.RectF r = rect();
mPath.reset();
if (mOuterRadii != null)
{
mPath.addRoundRect(r, mOuterRadii, android.graphics.Path.Direction.CW);
}
else
{
mPath.addRect(r, android.graphics.Path.Direction.CW);
}
if (mInnerRect != null)
{
mInnerRect.set(r.left + mInset.left, r.top + mInset.top, r.right - mInset.right,
r.bottom - mInset.bottom);
if (mInnerRect.width() < w && mInnerRect.height() < h)
{
if (mInnerRadii != null)
{
mPath.addRoundRect(mInnerRect, mInnerRadii, android.graphics.Path.Direction.CCW);
}
else
{
mPath.addRect(mInnerRect, android.graphics.Path.Direction.CCW);
}
}
}
}
/// <summary>
/// Returns an immutable bitmap from subset of the source bitmap,
/// transformed by the optional matrix.
/// </summary>
/// <remarks>
/// Returns an immutable bitmap from subset of the source bitmap,
/// transformed by the optional matrix. It is
/// initialized with the same density as the original bitmap.
/// </remarks>
/// <param name="source">The bitmap we are subsetting</param>
/// <param name="x">The x coordinate of the first pixel in source</param>
/// <param name="y">The y coordinate of the first pixel in source</param>
/// <param name="width">The number of pixels in each row</param>
/// <param name="height">The number of rows</param>
/// <param name="m">Optional matrix to be applied to the pixels</param>
/// <param name="filter">
/// true if the source should be filtered.
/// Only applies if the matrix contains more than just
/// translation.
/// </param>
/// <returns>A bitmap that represents the specified subset of source</returns>
/// <exception cref="System.ArgumentException">
/// if the x, y, width, height values are
/// outside of the dimensions of the source bitmap.
/// </exception>
public static android.graphics.Bitmap createBitmap(android.graphics.Bitmap source
, int x, int y, int width, int height, android.graphics.Matrix m, bool filter)
{
checkXYSign(x, y);
checkWidthHeight(width, height);
if (x + width > source.getWidth())
{
throw new System.ArgumentException("x + width must be <= bitmap.width()");
}
if (y + height > source.getHeight())
{
throw new System.ArgumentException("y + height must be <= bitmap.height()");
}
// check if we can just return our argument unchanged
if (!source.isMutable() && x == 0 && y == 0 && width == source.getWidth() && height
== source.getHeight() && (m == null || m.isIdentity()))
{
return source;
}
int neww = width;
int newh = height;
android.graphics.Canvas canvas = new android.graphics.Canvas();
android.graphics.Bitmap bitmap;
android.graphics.Paint paint;
android.graphics.Rect srcR = new android.graphics.Rect(x, y, x + width, y + height
);
android.graphics.RectF dstR = new android.graphics.RectF(0, 0, width, height);
android.graphics.Bitmap.Config newConfig = android.graphics.Bitmap.Config.ARGB_8888;
android.graphics.Bitmap.Config config = source.getConfig();
// GIF files generate null configs, assume ARGB_8888
if (config != null)
{
switch (config)
{
case android.graphics.Bitmap.Config.RGB_565:
{
newConfig = android.graphics.Bitmap.Config.RGB_565;
break;
}
case android.graphics.Bitmap.Config.ALPHA_8:
{
newConfig = android.graphics.Bitmap.Config.ALPHA_8;
break;
}
case android.graphics.Bitmap.Config.ARGB_4444:
case android.graphics.Bitmap.Config.ARGB_8888:
default:
{
//noinspection deprecation
newConfig = android.graphics.Bitmap.Config.ARGB_8888;
break;
}
}
}
if (m == null || m.isIdentity())
{
bitmap = createBitmap(neww, newh, newConfig, source.hasAlpha());
paint = null;
}
else
{
// not needed
bool transformed = !m.rectStaysRect();
android.graphics.RectF deviceR = new android.graphics.RectF();
m.mapRect(deviceR, dstR);
neww = Sharpen.Util.Round(deviceR.width());
newh = Sharpen.Util.Round(deviceR.height());
bitmap = createBitmap(neww, newh, transformed ? android.graphics.Bitmap.Config.ARGB_8888
: newConfig, transformed || source.hasAlpha());
canvas.translate(-deviceR.left, -deviceR.top);
canvas.concat(m);
paint = new android.graphics.Paint();
paint.setFilterBitmap(filter);
if (transformed)
{
paint.setAntiAlias(true);
}
}
// The new bitmap was created from a known bitmap source so assume that
// they use the same density
bitmap.mDensity = source.mDensity;
canvas.setBitmap(bitmap);
canvas.drawBitmap(source, srcR, dstR, paint);
canvas.setBitmap(null);
return bitmap;
}
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);
}
}
}
}
}
internal android.graphics.Path buildRing(android.graphics.drawable.GradientDrawable
.GradientState st)
{
if (mRingPath != null && (!st.mUseLevelForShape || !mPathIsDirty))
{
return mRingPath;
}
mPathIsDirty = false;
float sweep = st.mUseLevelForShape ? (360.0f * getLevel() / 10000.0f) : 360f;
android.graphics.RectF bounds = new android.graphics.RectF(mRect);
float x = bounds.width() / 2.0f;
float y = bounds.height() / 2.0f;
float thickness = st.mThickness != -1 ? st.mThickness : bounds.width() / st.mThicknessRatio;
// inner radius
float radius = st.mInnerRadius != -1 ? st.mInnerRadius : bounds.width() / st.mInnerRadiusRatio;
android.graphics.RectF innerBounds = new android.graphics.RectF(bounds);
innerBounds.inset(x - radius, y - radius);
bounds = new android.graphics.RectF(innerBounds);
bounds.inset(-thickness, -thickness);
if (mRingPath == null)
{
mRingPath = new android.graphics.Path();
}
else
{
mRingPath.reset();
}
android.graphics.Path ringPath = mRingPath;
// arcTo treats the sweep angle mod 360, so check for that, since we
// think 360 means draw the entire oval
if (sweep < 360 && sweep > -360)
{
ringPath.setFillType(android.graphics.Path.FillType.EVEN_ODD);
// inner top
ringPath.moveTo(x + radius, y);
// outer top
ringPath.lineTo(x + radius + thickness, y);
// outer arc
ringPath.arcTo(bounds, 0.0f, sweep, false);
// inner arc
ringPath.arcTo(innerBounds, sweep, -sweep, false);
ringPath.close();
}
else
{
// add the entire ovals
ringPath.addOval(bounds, android.graphics.Path.Direction.CW);
ringPath.addOval(innerBounds, android.graphics.Path.Direction.CCW);
}
return ringPath;
}