/**
* Gets the crop window's position relative to the source Bitmap (not the image
* displayed in the CropImageView).
*
* @return a RectF instance containing cropped area boundaries of the source Bitmap
*/
public RectF GetActualCropRect()
{
try
{
Rect displayedImageRect = ImageViewUtil.getBitmapRectCenterInside(mBitmap, mImageView);
// Get the scale factor between the actual Bitmap dimensions and the
// displayed dimensions for width.
float actualImageWidth = mBitmap.Width;
float displayedImageWidth = displayedImageRect.Width();
float scaleFactorWidth = actualImageWidth / displayedImageWidth;
// Get the scale factor between the actual Bitmap dimensions and the
// displayed dimensions for height.
float actualImageHeight = mBitmap.Height;
float displayedImageHeight = displayedImageRect.Height();
float scaleFactorHeight = actualImageHeight / displayedImageHeight;
// Get crop window position relative to the displayed image.
float displayedCropLeft = EdgeManager.LEFT.coordinate - displayedImageRect.Left;
float displayedCropTop = EdgeManager.TOP.coordinate - displayedImageRect.Top;
float displayedCropWidth = Edge.getWidth();
float displayedCropHeight = Edge.getHeight();
// Scale the crop window position to the actual size of the Bitmap.
float actualCropLeft = displayedCropLeft * scaleFactorWidth;
float actualCropTop = displayedCropTop * scaleFactorHeight;
float actualCropRight = actualCropLeft + displayedCropWidth * scaleFactorWidth;
float actualCropBottom = actualCropTop + displayedCropHeight * scaleFactorHeight;
// Correct for floating point errors. Crop rect boundaries should not
// exceed the source Bitmap bounds.
actualCropLeft = Math.Max(0f, actualCropLeft);
actualCropTop = Math.Max(0f, actualCropTop);
actualCropRight = Math.Min(mBitmap.Width, actualCropRight);
actualCropBottom = Math.Min(mBitmap.Height, actualCropBottom);
var actualCropRect = new RectF(actualCropLeft,
actualCropTop,
actualCropRight,
actualCropBottom);
return(actualCropRect);
}
catch (Exception ex)
{
ex.ToString();
}
return(null);
}
/**
* Gets the cropped image based on the current crop window.
*
* @return a new Bitmap representing the cropped image
*/
public Bitmap GetCroppedImage()
{
try
{
Rect displayedImageRect = ImageViewUtil.getBitmapRectCenterInside(mBitmap, mImageView);
// Get the scale factor between the actual Bitmap dimensions and the
// displayed dimensions for width.
float actualImageWidth = mBitmap.Width;
float displayedImageWidth = displayedImageRect.Width();
float scaleFactorWidth = actualImageWidth / displayedImageWidth;
// Get the scale factor between the actual Bitmap dimensions and the
// displayed dimensions for height.
float actualImageHeight = mBitmap.Height;
float displayedImageHeight = displayedImageRect.Height();
float scaleFactorHeight = actualImageHeight / displayedImageHeight;
// Get crop window position relative to the displayed image.
float cropWindowX = EdgeManager.LEFT.coordinate - displayedImageRect.Left;
float cropWindowY = EdgeManager.TOP.coordinate - displayedImageRect.Top;
float cropWindowWidth = Edge.getWidth();
float cropWindowHeight = Edge.getHeight();
// Scale the crop window position to the actual size of the Bitmap.
float actualCropX = cropWindowX * scaleFactorWidth;
float actualCropY = cropWindowY * scaleFactorHeight;
float actualCropWidth = cropWindowWidth * scaleFactorWidth;
float actualCropHeight = cropWindowHeight * scaleFactorHeight;
// Crop the subset from the original Bitmap.
Bitmap croppedBitmap = Bitmap.CreateBitmap(mBitmap,
(int)actualCropX,
(int)actualCropY,
(int)actualCropWidth,
(int)actualCropHeight);
return(croppedBitmap);
}
catch (Exception ex)
{
ex.ToString();
}
return(null);
}
private void DrawRuleOfThirdsGuidelines(Canvas canvas)
{
try
{
float left = EdgeManager.LEFT.coordinate;
float top = EdgeManager.TOP.coordinate;
float right = EdgeManager.RIGHT.coordinate;
float bottom = EdgeManager.BOTTOM.coordinate;
float cx = (left + right) / 2;
float cy = (top + bottom) / 2;
float radius = (right - left) / 2;
var circleSelectionPath = new Path();
circleSelectionPath.AddCircle(cx, cy, radius, Path.Direction.Cw);
canvas.ClipPath(circleSelectionPath, Region.Op.Replace);
// Draw vertical guidelines.
float oneThirdCropWidth = Edge.getWidth() / 3;
float x1 = left + oneThirdCropWidth;
canvas.DrawLine(x1, top, x1, bottom, mGuidelinePaint);
float x2 = right - oneThirdCropWidth;
canvas.DrawLine(x2, top, x2, bottom, mGuidelinePaint);
// Draw horizontal guidelines.
float oneThirdCropHeight = Edge.getHeight() / 3;
float y1 = top + oneThirdCropHeight;
canvas.DrawLine(left, y1, right, y1, mGuidelinePaint);
float y2 = bottom - oneThirdCropHeight;
canvas.DrawLine(left, y2, right, y2, mGuidelinePaint);
}
catch (Exception ex)
{
ex.ToString();
}
}
/**
* Returns whether or not you can re-scale the image based on whether any edge would be out of bounds.
* Checks all the edges for a possibility of jumping out of bounds.
*
* @param Edge the Edge that is about to be expanded
* @param imageRect the rectangle of the picture
* @param aspectratio the desired aspectRatio of the picture.
*
* @return whether or not the new image would be out of bounds.
*/
public bool isNewRectangleOutOfBounds(Edge edge, Rect imageRect, float aspectRatio)
{
float offset = edge.snapOffset(imageRect);
switch (edgeType)
{
case EdgeType.LEFT:
if (edge.Equals(EdgeManager.TOP))
{
float top = imageRect.Top;
float bottom = EdgeManager.BOTTOM.coordinate - offset;
float right = EdgeManager.RIGHT.coordinate;
float left = AspectRatioUtil.calculateLeft(top, right, bottom, aspectRatio);
return(isOutOfBounds(top, left, bottom, right, imageRect));
}
else if (edge.Equals(EdgeManager.BOTTOM))
{
float bottom = imageRect.Bottom;
float top = EdgeManager.TOP.coordinate - offset;
float right = EdgeManager.RIGHT.coordinate;
float left = AspectRatioUtil.calculateLeft(top, right, bottom, aspectRatio);
return(isOutOfBounds(top, left, bottom, right, imageRect));
}
break;
case EdgeType.TOP:
if (edge.Equals(EdgeManager.LEFT))
{
float left = imageRect.Left;
float right = EdgeManager.RIGHT.coordinate - offset;
float bottom = EdgeManager.BOTTOM.coordinate;
float top = AspectRatioUtil.calculateTop(left, right, bottom, aspectRatio);
return(isOutOfBounds(top, left, bottom, right, imageRect));
}
else if (edge.Equals(EdgeManager.RIGHT))
{
float right = imageRect.Right;
float left = EdgeManager.LEFT.coordinate - offset;
float bottom = EdgeManager.BOTTOM.coordinate;
float top = AspectRatioUtil.calculateTop(left, right, bottom, aspectRatio);
return(isOutOfBounds(top, left, bottom, right, imageRect));
}
break;
case EdgeType.RIGHT:
if (edge.Equals(EdgeManager.TOP))
{
float top = imageRect.Top;
float bottom = EdgeManager.BOTTOM.coordinate - offset;
float left = EdgeManager.LEFT.coordinate;
float right = AspectRatioUtil.calculateRight(left, top, bottom, aspectRatio);
return(isOutOfBounds(top, left, bottom, right, imageRect));
}
else if (edge.Equals(EdgeManager.BOTTOM))
{
float bottom = imageRect.Bottom;
float top = EdgeManager.TOP.coordinate - offset;
float left = EdgeManager.LEFT.coordinate;
float right = AspectRatioUtil.calculateRight(left, top, bottom, aspectRatio);
return(isOutOfBounds(top, left, bottom, right, imageRect));
}
break;
case EdgeType.BOTTOM:
if (edge.Equals(EdgeManager.LEFT))
{
float left = imageRect.Left;
float right = EdgeManager.RIGHT.coordinate - offset;
float top = EdgeManager.TOP.coordinate;
float bottom = AspectRatioUtil.calculateBottom(left, top, right, aspectRatio);
return(isOutOfBounds(top, left, bottom, right, imageRect));
}
else if (edge.Equals(EdgeManager.RIGHT))
{
float right = imageRect.Right;
float left = EdgeManager.LEFT.coordinate - offset;
float top = EdgeManager.TOP.coordinate;
float bottom = AspectRatioUtil.calculateBottom(left, top, right, aspectRatio);
return(isOutOfBounds(top, left, bottom, right, imageRect));
}
break;
}
return(true);
}