/**
* Extracts the image data from the Image.
*
* @param image The image for which to extract the content
* @return The raw image data, not formated
* @throws DocumentException If an error occurs accessing the image content
*/
private byte[][] GetImageData(Image image)
{
int WMF_PLACEABLE_HEADER_SIZE = 22;
RtfByteArrayBuffer bab = new RtfByteArrayBuffer();
try {
if (imageType == Image.ORIGINAL_BMP) {
bab.Append(MetaDo.WrapBMP(image));
} else {
byte[] iod = image.OriginalData;
if (iod == null) {
Stream imageIn = WebRequest.Create(image.Url).GetResponse().GetResponseStream();
if (imageType == Image.ORIGINAL_WMF) { //remove the placeable header first
for (int k = 0; k < WMF_PLACEABLE_HEADER_SIZE; k++) {
if (imageIn.ReadByte() < 0) throw (new IOException("while removing wmf placeable header"));
}
}
bab.Write(imageIn);
imageIn.Close();
} else {
if (imageType == Image.ORIGINAL_WMF) {
//remove the placeable header
bab.Write(iod, WMF_PLACEABLE_HEADER_SIZE, iod.Length - WMF_PLACEABLE_HEADER_SIZE);
} else {
bab.Append(iod);
}
}
}
return bab.ToArrayArray();
} catch (IOException ioe) {
throw new DocumentException(ioe.Message);
}
}
/**
* Constructs a RtfMemoryCache.
*/
public RtfEfficientMemoryCache() {
bab = new RtfByteArrayBuffer();
}
/**
* Constructs a RtfMemoryCache.
*/
public RtfEfficientMemoryCache()
{
bab = new RtfByteArrayBuffer();
}
