/// <summary>Draw a bitmap of nine patches.</summary>
/// <remarks>Draw a bitmap of nine patches.</remarks>
/// <param name="canvas">A container for the current matrix and clip used to draw the bitmap.
/// </param>
/// <param name="location">Where to draw the bitmap.</param>
public virtual void draw(android.graphics.Canvas canvas, android.graphics.Rect location
)
{
if (!canvas.isHardwareAccelerated())
{
nativeDraw(canvas.mNativeCanvas, location, mBitmap.nativeInstance, mChunk, mPaint
!= null ? mPaint.mNativePaint : null, canvas.mDensity, mBitmap.mDensity);
}
else
{
mRect.set(location);
canvas.drawPatch(mBitmap, mChunk, mRect, mPaint);
}
}
public override void initializeInvalidateRegion(int left, int top, int right, int
bottom)
{
android.graphics.RectF region = mPreviousRegion;
region.set(left, top, right, bottom);
region.inset(-1.0f, -1.0f);
if (mFillBefore)
{
int count = mAnimations.size();
java.util.ArrayList <android.view.animation.Animation> animations = mAnimations;
android.view.animation.Transformation temp = mTempTransformation;
android.view.animation.Transformation previousTransformation = mPreviousTransformation;
{
for (int i = count - 1; i >= 0; --i)
{
android.view.animation.Animation a = animations.get(i);
temp.clear();
android.view.animation.Interpolator interpolator = a.mInterpolator;
a.applyTransformation(interpolator != null ? interpolator.getInterpolation(0.0f) :
0.0f, temp);
previousTransformation.compose(temp);
}
}
}
}
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);
}
}
}
}
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);
}
}
}
}
}
private void configureBounds()
{
if (mDrawable == null || !mHaveFrame)
{
return;
}
int dwidth = mDrawableWidth;
int dheight = mDrawableHeight;
int vwidth = getWidth() - mPaddingLeft - mPaddingRight;
int vheight = getHeight() - mPaddingTop - mPaddingBottom;
bool fits = (dwidth < 0 || vwidth == dwidth) && (dheight < 0 || vheight == dheight
);
if (dwidth <= 0 || dheight <= 0 || android.widget.ImageView.ScaleType.FIT_XY == mScaleType)
{
mDrawable.setBounds(0, 0, vwidth, vheight);
mDrawMatrix = null;
}
else
{
// We need to do the scaling ourself, so have the drawable
// use its native size.
mDrawable.setBounds(0, 0, dwidth, dheight);
if (android.widget.ImageView.ScaleType.MATRIX == mScaleType)
{
// Use the specified matrix as-is.
if (mMatrix.isIdentity())
{
mDrawMatrix = null;
}
else
{
mDrawMatrix = mMatrix;
}
}
else
{
if (fits)
{
// The bitmap fits exactly, no transform needed.
mDrawMatrix = null;
}
else
{
if (android.widget.ImageView.ScaleType.CENTER == mScaleType)
{
// Center bitmap in view, no scaling.
mDrawMatrix = mMatrix;
mDrawMatrix.setTranslate((int)((vwidth - dwidth) * 0.5f + 0.5f), (int)((vheight -
dheight) * 0.5f + 0.5f));
}
else
{
if (android.widget.ImageView.ScaleType.CENTER_CROP == mScaleType)
{
mDrawMatrix = mMatrix;
float scale;
float dx = 0;
float dy = 0;
if (dwidth * vheight > vwidth * dheight)
{
scale = (float)vheight / (float)dheight;
dx = (vwidth - dwidth * scale) * 0.5f;
}
else
{
scale = (float)vwidth / (float)dwidth;
dy = (vheight - dheight * scale) * 0.5f;
}
mDrawMatrix.setScale(scale, scale);
mDrawMatrix.postTranslate((int)(dx + 0.5f), (int)(dy + 0.5f));
}
else
{
if (android.widget.ImageView.ScaleType.CENTER_INSIDE == mScaleType)
{
mDrawMatrix = mMatrix;
float scale;
float dx;
float dy;
if (dwidth <= vwidth && dheight <= vheight)
{
scale = 1.0f;
}
else
{
scale = System.Math.Min((float)vwidth / (float)dwidth, (float)vheight / (float)dheight
);
}
dx = (int)((vwidth - dwidth * scale) * 0.5f + 0.5f);
dy = (int)((vheight - dheight * scale) * 0.5f + 0.5f);
mDrawMatrix.setScale(scale, scale);
mDrawMatrix.postTranslate(dx, dy);
}
else
{
// Generate the required transform.
mTempSrc.set(0, 0, dwidth, dheight);
mTempDst.set(0, 0, vwidth, vheight);
mDrawMatrix = mMatrix;
mDrawMatrix.setRectToRect(mTempSrc, mTempDst, scaleTypeToScaleToFit(mScaleType));
}
}
}
}
}
}
}
protected internal override void onResize(float width, float height)
{
mRect.set(0, 0, width, height);
}