internal static void Crop(CleanApertureBox cleanApertureBox, ref Surface surface)
{
if (cleanApertureBox is null)
{
ExceptionUtil.ThrowArgumentNullException(nameof(cleanApertureBox));
}
if (cleanApertureBox.Width.Denominator == 0 ||
cleanApertureBox.Height.Denominator == 0 ||
cleanApertureBox.HorizontalOffset.Denominator == 0 ||
cleanApertureBox.VerticalOffset.Denominator == 0)
{
return;
}
int cropWidth = cleanApertureBox.Width.ToInt32();
int cropHeight = cleanApertureBox.Height.ToInt32();
double offsetX = cleanApertureBox.HorizontalOffset.ToDouble();
double offsetY = cleanApertureBox.VerticalOffset.ToDouble();
double pictureCenterX = offsetX + ((surface.Width - 1) / 2.0);
double pictureCenterY = offsetY + ((surface.Height - 1) / 2.0);
int cropRectX = (int)Math.Round(pictureCenterX - ((cropWidth - 1) / 2.0));
int cropRectY = (int)Math.Round(pictureCenterY - ((cropHeight - 1) / 2.0));
Rectangle cropRect = new Rectangle(cropRectX, cropRectY, cropWidth, cropHeight);
// Check that the crop rectangle is within the surface bounds.
if (cropRect.IntersectsWith(surface.Bounds))
{
Surface temp = new Surface(cropWidth, cropHeight);
try
{
temp.CopySurface(surface, cropRect);
surface.Dispose();
surface = temp;
temp = null;
}
finally
{
temp?.Dispose();
}
}
}
public void GetTransformationProperties(uint itemId,
out CleanApertureBox cleanAperture,
out ImageRotateBox imageRotate,
out ImageMirrorBox imageMirror)
{
cleanAperture = null;
imageRotate = null;
imageMirror = null;
ItemPropertiesBox itemPropertiesBox = this.metaBox.ItemProperties;
IReadOnlyList <ItemPropertyAssociationEntry> items = itemPropertiesBox.TryGetAssociatedProperties(itemId);
if (items != null)
{
for (int i = 0; i < items.Count; i++)
{
IItemProperty property = itemPropertiesBox.TryGetProperty(items[i].PropertyIndex);
if (property != null)
{
if (property.Type == BoxTypes.CleanAperture)
{
cleanAperture = (CleanApertureBox)property;
}
else if (property.Type == BoxTypes.ImageRotation)
{
imageRotate = (ImageRotateBox)property;
}
else if (property.Type == BoxTypes.ImageMirror)
{
imageMirror = (ImageMirrorBox)property;
}
}
}
}
}
