public XObjectImage CreateImage(XObjectContentRecord xObject, IPdfTokenScanner pdfScanner, bool isLenientParsing)
{
if (xObject == null)
{
throw new ArgumentNullException(nameof(xObject));
}
if (xObject.Type != XObjectType.Image)
{
throw new InvalidOperationException($"Cannot create an image from an XObject with type: {xObject.Type}.");
}
var width = xObject.Stream.StreamDictionary.Get <NumericToken>(NameToken.Width, pdfScanner).Int;
var height = xObject.Stream.StreamDictionary.Get <NumericToken>(NameToken.Height, pdfScanner).Int;
var isJpxDecode = xObject.Stream.StreamDictionary.TryGet(NameToken.Filter, out var token) &&
token is NameToken filterName &&
filterName.Equals(NameToken.JpxDecode);
var isImageMask = xObject.Stream.StreamDictionary.TryGet(NameToken.ImageMask, out var maskToken) &&
maskToken is BooleanToken maskBoolean &&
maskBoolean.Data;
return(new XObjectImage(width, height, isJpxDecode, isImageMask, xObject.Stream.StreamDictionary,
xObject.Stream.Data));
}
public static XObjectImage ReadImage(XObjectContentRecord xObject, IPdfTokenScanner pdfScanner,
IFilterProvider filterProvider,
IResourceStore resourceStore,
bool isLenientParsing)
{
if (xObject == null)
{
throw new ArgumentNullException(nameof(xObject));
}
if (xObject.Type != XObjectType.Image)
{
throw new InvalidOperationException($"Cannot create an image from an XObject with type: {xObject.Type}.");
}
var dictionary = xObject.Stream.StreamDictionary;
var bounds = xObject.AppliedTransformation.Transform(new PdfRectangle(new PdfPoint(0, 0), new PdfPoint(1, 1)));
var width = dictionary.Get <NumericToken>(NameToken.Width, pdfScanner).Int;
var height = dictionary.Get <NumericToken>(NameToken.Height, pdfScanner).Int;
var isImageMask = dictionary.TryGet(NameToken.ImageMask, pdfScanner, out BooleanToken isMaskToken) &&
isMaskToken.Data;
var isJpxDecode = dictionary.TryGet(NameToken.Filter, out var token) &&
token is NameToken filterName &&
filterName.Equals(NameToken.JpxDecode);
int bitsPerComponent = 0;
if (!isImageMask && !isJpxDecode)
{
if (!dictionary.TryGet(NameToken.BitsPerComponent, pdfScanner, out NumericToken bitsPerComponentToken))
{
throw new PdfDocumentFormatException($"No bits per component defined for image: {dictionary}.");
}
bitsPerComponent = bitsPerComponentToken.Int;
}
else if (isImageMask)
{
bitsPerComponent = 1;
}
var intent = xObject.DefaultRenderingIntent;
if (dictionary.TryGet(NameToken.Intent, out NameToken renderingIntentToken))
{
intent = renderingIntentToken.Data.ToRenderingIntent();
}
var interpolate = dictionary.TryGet(NameToken.Interpolate, pdfScanner, out BooleanToken interpolateToken) &&
interpolateToken.Data;
var decodedBytes = new Lazy <IReadOnlyList <byte> >(() => xObject.Stream.Decode(filterProvider));
var decode = EmptyArray <decimal> .Instance;
if (dictionary.TryGet(NameToken.Decode, pdfScanner, out ArrayToken decodeArrayToken))
{
decode = decodeArrayToken.Data.OfType <NumericToken>()
.Select(x => x.Data)
.ToArray();
}
var colorSpace = default(ColorSpace?);
if (!isImageMask)
{
if (dictionary.TryGet(NameToken.ColorSpace, pdfScanner, out NameToken colorSpaceNameToken) &&
TryMapColorSpace(colorSpaceNameToken, resourceStore, out var colorSpaceResult))
{
colorSpace = colorSpaceResult;
}
else if (dictionary.TryGet(NameToken.ColorSpace, pdfScanner, out ArrayToken colorSpaceArrayToken))
{
if (colorSpaceArrayToken.Length == 0)
{
throw new PdfDocumentFormatException($"Empty ColorSpace array defined for image XObject: {dictionary}.");
}
var first = colorSpaceArrayToken.Data[0];
if (!(first is NameToken firstColorSpaceName) || !TryMapColorSpace(firstColorSpaceName, resourceStore, out colorSpaceResult))
{
throw new PdfDocumentFormatException($"Invalid ColorSpace array defined for image XObject: {colorSpaceArrayToken}.");
}
colorSpace = colorSpaceResult;
}
else if (!isJpxDecode)
{
throw new PdfDocumentFormatException($"No ColorSpace defined for image XObject: {dictionary}.");
}
}
return(new XObjectImage(bounds, width, height, bitsPerComponent, colorSpace, isJpxDecode, isImageMask, intent, interpolate, decode,
dictionary, xObject.Stream.Data, decodedBytes));
}
public static XObjectImage ReadImage(XObjectContentRecord xObject, IPdfTokenScanner pdfScanner,
ILookupFilterProvider filterProvider,
IResourceStore resourceStore)
{
if (xObject == null)
{
throw new ArgumentNullException(nameof(xObject));
}
if (xObject.Type != XObjectType.Image)
{
throw new InvalidOperationException($"Cannot create an image from an XObject with type: {xObject.Type}.");
}
var dictionary = xObject.Stream.StreamDictionary;
var bounds = xObject.AppliedTransformation.Transform(new PdfRectangle(new PdfPoint(0, 0), new PdfPoint(1, 1)));
var width = dictionary.Get <NumericToken>(NameToken.Width, pdfScanner).Int;
var height = dictionary.Get <NumericToken>(NameToken.Height, pdfScanner).Int;
var isImageMask = dictionary.TryGet(NameToken.ImageMask, pdfScanner, out BooleanToken isMaskToken) &&
isMaskToken.Data;
var isJpxDecode = dictionary.TryGet(NameToken.Filter, out var token) &&
token is NameToken filterName &&
filterName.Equals(NameToken.JpxDecode);
int bitsPerComponent = 0;
if (!isImageMask && !isJpxDecode)
{
if (!dictionary.TryGet(NameToken.BitsPerComponent, pdfScanner, out NumericToken bitsPerComponentToken))
{
throw new PdfDocumentFormatException($"No bits per component defined for image: {dictionary}.");
}
bitsPerComponent = bitsPerComponentToken.Int;
}
else if (isImageMask)
{
bitsPerComponent = 1;
}
var intent = xObject.DefaultRenderingIntent;
if (dictionary.TryGet(NameToken.Intent, out NameToken renderingIntentToken))
{
intent = renderingIntentToken.Data.ToRenderingIntent();
}
var interpolate = dictionary.TryGet(NameToken.Interpolate, pdfScanner, out BooleanToken interpolateToken) &&
interpolateToken.Data;
DictionaryToken filterDictionary = xObject.Stream.StreamDictionary;
if (xObject.Stream.StreamDictionary.TryGet(NameToken.Filter, out var filterToken) &&
filterToken is IndirectReferenceToken)
{
if (filterDictionary.TryGet(NameToken.Filter, pdfScanner, out ArrayToken filterArray))
{
filterDictionary = filterDictionary.With(NameToken.Filter, filterArray);
}
else if (filterDictionary.TryGet(NameToken.Filter, pdfScanner, out NameToken filterNameToken))
{
filterDictionary = filterDictionary.With(NameToken.Filter, filterNameToken);
}
else
{
filterDictionary = null;
}
}
var supportsFilters = filterDictionary != null;
if (filterDictionary != null)
{
var filters = filterProvider.GetFilters(filterDictionary, pdfScanner);
foreach (var filter in filters)
{
if (!filter.IsSupported)
{
supportsFilters = false;
break;
}
}
}
var decodeParams = dictionary.GetObjectOrDefault(NameToken.DecodeParms, NameToken.Dp);
if (decodeParams is IndirectReferenceToken refToken)
{
dictionary = dictionary.With(NameToken.DecodeParms, pdfScanner.Get(refToken.Data).Data);
}
var streamToken = new StreamToken(dictionary, xObject.Stream.Data);
var decodedBytes = supportsFilters ? new Lazy <IReadOnlyList <byte> >(() => streamToken.Decode(filterProvider, pdfScanner))
: null;
var decode = EmptyArray <decimal> .Instance;
if (dictionary.TryGet(NameToken.Decode, pdfScanner, out ArrayToken decodeArrayToken))
{
decode = decodeArrayToken.Data.OfType <NumericToken>()
.Select(x => x.Data)
.ToArray();
}
var colorSpace = default(ColorSpace?);
if (!isImageMask)
{
if (dictionary.TryGet(NameToken.ColorSpace, pdfScanner, out NameToken colorSpaceNameToken) &&
TryMapColorSpace(colorSpaceNameToken, resourceStore, out var colorSpaceResult))
{
colorSpace = colorSpaceResult;
}
else if (dictionary.TryGet(NameToken.ColorSpace, pdfScanner, out ArrayToken colorSpaceArrayToken) &&
colorSpaceArrayToken.Length > 0)
{
var first = colorSpaceArrayToken.Data[0];
if ((first is NameToken firstColorSpaceName) && TryMapColorSpace(firstColorSpaceName, resourceStore, out colorSpaceResult))
{
colorSpace = colorSpaceResult;
}
}
else if (!isJpxDecode)
{
colorSpace = xObject.DefaultColorSpace;
}
}
var details = ColorSpaceDetailsParser.GetColorSpaceDetails(colorSpace, dictionary, pdfScanner, resourceStore, filterProvider);
return(new XObjectImage(
bounds,
width,
height,
bitsPerComponent,
colorSpace,
isJpxDecode,
isImageMask,
intent,
interpolate,
decode,
dictionary,
xObject.Stream.Data,
decodedBytes,
details));
}
