private PDFSize CalculateAppropriateImageSize(PDFImageData imgdata, PDFRect bounds)
{
//Find the dimension that makes sure the bounds are fully covered
double scale = (bounds.Width.PointsValue / imgdata.DisplayWidth.PointsValue);
double resultHeight = imgdata.DisplayHeight.PointsValue * scale;
if (resultHeight < bounds.Height)
{
scale = bounds.Height.PointsValue / imgdata.DisplayHeight.PointsValue;
}
PDFUnit imgw = imgdata.DisplayWidth.PointsValue * scale;
PDFUnit imgh = imgdata.DisplayHeight.PointsValue * scale;
if (imgw > bounds.Width)
{
this.XPostion = -((imgw.PointsValue - bounds.Width.PointsValue) / 2.0);
}
if (imgh > bounds.Height)
{
this.YPostion = -((imgh.PointsValue - bounds.Height.PointsValue) / 2.0);
}
this.XStep = imgw;
this.YStep = imgh;
return(new PDFSize(imgw, imgh));
}
public static PDFImageData LoadImageFromUriData(string src, IPDFDocument document, IPDFComponent owner)
{
if (null == document)
{
throw new ArgumentNullException("document");
}
if (null == owner)
{
throw new ArgumentNullException("owner");
}
var dataUri = ParseDataURI(src);
if (dataUri.encoding != "base64")
{
throw new ArgumentException("src", $"unsupported encoding {dataUri.encoding}; expected base64");
}
if (dataUri.mediaType != "image/png")
{
throw new ArgumentException("src", $"unsupported encoding {dataUri.mediaType}; expected image/png");
}
var binary = Convert.FromBase64String(dataUri.data);
using (var ms = new System.IO.MemoryStream(binary))
{
return(PDFImageData.LoadImageFromStream(document.GetIncrementID(owner.Type) + "data_png", ms, owner));
}
}
private PDFSize CalculateAppropriateImageSize(PDFImageData imgdata)
{
if (this.XSize > 0 && this.YSize > 0)
{
//We have both explicit widths
return(new PDFSize(this.XSize, this.YSize));
}
PDFUnit imgw = imgdata.DisplayWidth;
PDFUnit imgh = imgdata.DisplayHeight;
//If we have one dimension, then calculate the other proportionally.
if (this.XSize > 0)
{
imgh = this.XSize * (imgh.PointsValue / imgw.PointsValue);
imgw = this.XSize;
}
else if (this.XSize > 0)
{
imgw = this.XSize * (imgw.PointsValue / imgh.PointsValue);
imgh = this.XSize;
}
return(new PDFSize(imgw, imgh));
}
/// <summary>
/// Creates a new PDFImageData instance from the specified bitmap.
/// The sourceKey is a unique reference to this image data in the document
/// </summary>
/// <param name="sourcekey"></param>
/// <param name="bitmap"></param>
/// <returns></returns>
public static PDFImageData LoadImageFromBitmap(string sourcekey, System.Drawing.Bitmap bitmap, bool compress = false)
{
if (null == bitmap)
{
throw new ArgumentNullException("bitmap");
}
PDFImageData data = InitImageData(sourcekey, bitmap, compress);
return(data);
}
public static PDFImageData Parse(string data, bool compress)
{
if (string.IsNullOrEmpty(data) == false)
{
try
{
byte[] binary = System.Convert.FromBase64String(data);
using (System.IO.MemoryStream ms = new System.IO.MemoryStream(binary))
{
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(ms);
return(PDFImageData.LoadImageFromBitmap(Guid.NewGuid().ToString(), bmp, compress));
}
}
catch (Exception ex)
{
throw new PDFException("Cannot convert the BASE64 string to image data", ex);
}
}
else
{
return(null);
}
}
