private void CalculateImageDimensions()
{
ImageFormatInfo formatInfo = (ImageFormatInfo)this.renderInfo.FormatInfo;
if (formatInfo.Failure == ImageFailure.None)
{
XImage xImage = null;
try
{
xImage = XImage.FromImageSource(formatInfo.ImageSource);
}
catch (InvalidOperationException ex)
{
Debug.WriteLine(string.Format(AppResources.InvalidImageType, ex.Message));
formatInfo.Failure = ImageFailure.InvalidType;
}
try
{
XUnit usrWidth = image.Width.Point;
XUnit usrHeight = image.Height.Point;
bool usrWidthSet = !this.image.IsNull("Width");
bool usrHeightSet = !this.image.IsNull("Height");
XUnit resultWidth = usrWidth;
XUnit resultHeight = usrHeight;
double xPixels = xImage.PixelWidth;
bool usrResolutionSet = !image.IsNull("Resolution");
double horzRes = usrResolutionSet ? (double)image.Resolution : xImage.HorizontalResolution;
XUnit inherentWidth = XUnit.FromInch(xPixels / horzRes);
double yPixels = xImage.PixelHeight;
double vertRes = usrResolutionSet ? (double)image.Resolution : xImage.VerticalResolution;
XUnit inherentHeight = XUnit.FromInch(yPixels / vertRes);
bool lockRatio = this.image.IsNull("LockAspectRatio") ? true : image.LockAspectRatio;
double scaleHeight = this.image.ScaleHeight;
double scaleWidth = this.image.ScaleWidth;
bool scaleHeightSet = !this.image.IsNull("ScaleHeight");
bool scaleWidthSet = !this.image.IsNull("ScaleWidth");
if (lockRatio)
{
if (usrWidthSet && usrHeightSet)
{
if (inherentHeight / usrHeight > inherentWidth / usrWidth)
{
usrWidthSet = false;
}
else
{
usrHeightSet = false;
}
}
if (usrWidthSet && !usrHeightSet)
{
resultHeight = inherentHeight / inherentWidth * usrWidth;
}
else if (usrHeightSet && !usrWidthSet)
{
resultWidth = inherentWidth / inherentHeight * usrHeight;
}
else if (!usrHeightSet && !usrWidthSet)
{
resultHeight = inherentHeight;
resultWidth = inherentWidth;
}
if (scaleHeightSet || scaleHeightSet && scaleWidthSet && scaleHeight < scaleWidth)
{
resultHeight = resultHeight * scaleHeight;
resultWidth = resultWidth * scaleHeight;
}
else if (scaleWidthSet || scaleHeightSet && scaleWidthSet && scaleHeight > scaleWidth)
{
resultHeight = resultHeight * scaleWidth;
resultWidth = resultWidth * scaleWidth;
}
}
else
{
if (!usrHeightSet)
{
resultHeight = inherentHeight;
}
if (!usrWidthSet)
{
resultWidth = inherentWidth;
}
if (scaleHeightSet)
{
resultHeight = resultHeight * scaleHeight;
}
if (scaleWidthSet)
{
resultWidth = resultWidth * scaleWidth;
}
}
formatInfo.CropWidth = (int)xPixels;
formatInfo.CropHeight = (int)yPixels;
if (!this.image.IsNull("PictureFormat"))
{
PictureFormat picFormat = this.image.PictureFormat;
//Cropping in pixels.
XUnit cropLeft = picFormat.CropLeft.Point;
XUnit cropRight = picFormat.CropRight.Point;
XUnit cropTop = picFormat.CropTop.Point;
XUnit cropBottom = picFormat.CropBottom.Point;
formatInfo.CropX = (int)(horzRes * cropLeft.Inch);
formatInfo.CropY = (int)(vertRes * cropTop.Inch);
formatInfo.CropWidth -= (int)(horzRes * ((XUnit)(cropLeft + cropRight)).Inch);
formatInfo.CropHeight -= (int)(vertRes * ((XUnit)(cropTop + cropBottom)).Inch);
//Scaled cropping of the height and width.
double xScale = resultWidth / inherentWidth;
double yScale = resultHeight / inherentHeight;
cropLeft = xScale * cropLeft;
cropRight = xScale * cropRight;
cropTop = yScale * cropTop;
cropBottom = yScale * cropBottom;
resultHeight = resultHeight - cropTop - cropBottom;
resultWidth = resultWidth - cropLeft - cropRight;
}
if (resultHeight <= 0 || resultWidth <= 0)
{
formatInfo.Width = XUnit.FromCentimeter(2.5);
formatInfo.Height = XUnit.FromCentimeter(2.5);
Debug.WriteLine(AppResources.EmptyImageSize);
this.failure = ImageFailure.EmptySize;
}
else
{
formatInfo.Width = resultWidth;
formatInfo.Height = resultHeight;
}
}
catch (Exception ex)
{
Debug.WriteLine(string.Format(AppResources.ImageNotReadable, image.Source.ToString(), ex.Message));
formatInfo.Failure = ImageFailure.NotRead;
}
finally
{
if (xImage != null)
{
xImage.Dispose();
}
}
}
if (formatInfo.Failure != ImageFailure.None)
{
if (!this.image.IsNull("Width"))
{
formatInfo.Width = this.image.Width.Point;
}
else
{
formatInfo.Width = XUnit.FromCentimeter(2.5);
}
if (!this.image.IsNull("Height"))
{
formatInfo.Height = this.image.Height.Point;
}
else
{
formatInfo.Height = XUnit.FromCentimeter(2.5);
}
return;
}
}