/// <summary>Finish editing pixels in the surface.</summary>
/// <remarks>
/// Finish editing pixels in the surface. After this call, the surface's
/// current pixels will be shown on the screen, but its content is lost,
/// in particular there is no guarantee that the content of the Surface
/// will remain unchanged when lockCanvas() is called again.
/// </remarks>
/// <param name="canvas">The Canvas previously returned by lockCanvas()</param>
/// <seealso cref="lockCanvas()">lockCanvas()</seealso>
/// <seealso cref="lockCanvas(android.graphics.Rect)"></seealso>
public virtual void unlockCanvasAndPost(android.graphics.Canvas canvas)
{
if (mCanvas != null && canvas == mCanvas)
{
canvas.restoreToCount(mSaveCount);
mSaveCount = 0;
lock (mNativeWindowLock)
{
nUnlockCanvasAndPost(mNativeWindow, mCanvas);
}
}
}
public override void draw(android.graphics.Canvas canvas)
{
int saveCount = canvas.save();
android.graphics.drawable.AnimatedRotateDrawable.AnimatedRotateState st = mState;
android.graphics.drawable.Drawable drawable = st.mDrawable;
android.graphics.Rect bounds = drawable.getBounds();
int w = bounds.right - bounds.left;
int h = bounds.bottom - bounds.top;
float px = st.mPivotXRel ? (w * st.mPivotX) : st.mPivotX;
float py = st.mPivotYRel ? (h * st.mPivotY) : st.mPivotY;
canvas.rotate(mCurrentDegrees, px + bounds.left, py + bounds.top);
drawable.draw(canvas);
canvas.restoreToCount(saveCount);
}
public override void draw(android.graphics.Canvas canvas)
{
android.graphics.Rect r = getBounds();
android.graphics.Paint paint = mShapeState.mPaint;
int prevAlpha = paint.getAlpha();
paint.setAlpha(modulateAlpha(prevAlpha, mShapeState.mAlpha));
if (mShapeState.mShape != null)
{
// need the save both for the translate, and for the (unknown) Shape
int count = canvas.save();
canvas.translate(r.left, r.top);
onDraw(mShapeState.mShape, canvas, paint);
canvas.restoreToCount(count);
}
else
{
canvas.drawRect(r, paint);
}
// restore
paint.setAlpha(prevAlpha);
}
protected internal override void onDraw(android.graphics.Canvas canvas)
{
base.onDraw(canvas);
if (mDrawable == null)
{
return;
}
// couldn't resolve the URI
if (mDrawableWidth == 0 || mDrawableHeight == 0)
{
return;
}
// nothing to draw (empty bounds)
if (mDrawMatrix == null && mPaddingTop == 0 && mPaddingLeft == 0)
{
mDrawable.draw(canvas);
}
else
{
int saveCount = canvas.getSaveCount();
canvas.save();
if (mCropToPadding)
{
int scrollX = mScrollX;
int scrollY = mScrollY;
canvas.clipRect(scrollX + mPaddingLeft, scrollY + mPaddingTop, scrollX + mRight -
mLeft - mPaddingRight, scrollY + mBottom - mTop - mPaddingBottom);
}
canvas.translate(mPaddingLeft, mPaddingTop);
if (mDrawMatrix != null)
{
canvas.concat(mDrawMatrix);
}
mDrawable.draw(canvas);
canvas.restoreToCount(saveCount);
}
}