/// <summary>
/// Outputs the first Page tree Component and calls Output on each of the layout pages.
/// </summary>
/// <param name="context">The current context</param>
/// <param name="writer">The current writer</param>
/// <returns>A reference to the current page tree root Component</returns>
protected virtual PDFObjectRef OutputPageTree(PDFRenderContext context, PDFWriter writer)
{
//Begin the Pages object and dictionary
PDFObjectRef pgs = writer.BeginObject(Const.PageTreeName);
writer.BeginDictionary();
writer.WriteDictionaryNameEntry("Type", "Pages");
List <PDFObjectRef> pagerefs = OutputAllPages(pgs, context, writer);
//write the kids array entry in the dictionary
writer.BeginDictionaryEntry("Kids");
writer.BeginArray();
foreach (PDFObjectRef kid in pagerefs)
{
writer.BeginArrayEntry();
writer.WriteFileObject(kid);
writer.EndArrayEntry();
}
writer.EndArray();
//Write the total number of pages to the dictionary
writer.EndDictionaryEntry();
writer.BeginDictionaryEntry("Count");
writer.WriteNumber(pagerefs.Count);
writer.EndDictionaryEntry();
//close the ditionary and the object
writer.EndDictionary();
writer.EndObject();
return(pgs);
}
public override void RenderWidthsArrayToPDF(PDFContextBase context, PDFWriter writer)
{
if (context.ShouldLogDebug)
{
context.TraceLog.Add(TraceLevel.Debug, "PDFFontWidths", "Width information will be rendered as a CID lookup set");
}
List <char> keys = new List <char>(this._char2offset.Keys);
keys.Sort();
writer.BeginArray();
SortedDictionary <int, int> glyph2width = new SortedDictionary <int, int>();
foreach (WidthMetric met in this._char2offset.Values)
{
glyph2width[met.Glyph] = met.Width;
}
if (context.ShouldLogDebug)
{
context.TraceLog.Add(TraceLevel.Debug, "PDFFontWidths", "CID Lookup built with glyph widths");
}
//Writes the used characters as [c[w] c[w] c[w]]
//TODO: Improve rendering
foreach (int g in glyph2width.Keys)
{
int w = glyph2width[g];
writer.WriteNumber(g);
writer.BeginArray();
writer.WriteNumber(w);
writer.EndArray();
}
writer.EndArray();
if (context.ShouldLogDebug)
{
context.TraceLog.Add(TraceLevel.Debug, "PDFFontWidths", glyph2width.Count.ToString() + " widths written as CID lookup set");
}
}
/// <summary>
/// Overrides the default method to write a 4 element array
/// </summary>
/// <param name="writer"></param>
protected override void RenderCustomColorSpace(PDFWriter writer)
{
writer.BeginDictionaryEntry("ColorSpace");
if (null == this.Pallette || this.Pallette.Length == 0)
{
throw new NullReferenceException("Palette");
}
else
{
PDFObjectRef index = writer.BeginObject();
writer.BeginArray();
writer.BeginArrayEntry();
writer.WriteName("Indexed");
writer.EndArrayEntry();
writer.BeginArrayEntry();
ColorSpace cs = this.Pallette[0].ColorSpace;
if (cs == ColorSpace.RGB)
{
writer.WriteName("DeviceRGB");
}
else if (cs == ColorSpace.G)
{
writer.WriteName("DeviceG");
}
else
{
throw new ArgumentOutOfRangeException("Palette[0].ColorSpace");
}
writer.EndArrayEntry();
writer.BeginArrayEntry();
writer.WriteNumber(this.Pallette.Length - 1);//maximum value not number of entries
writer.EndArrayEntry();
//check the stored instance
if (null == _bytestreamdata)
{
_bytestreamdata = GetPaletteString(cs);
}
writer.BeginArrayEntry();
writer.WriteByteString(_bytestreamdata);
writer.EndArrayEntry();
writer.EndArray();
writer.EndObject();
writer.WriteObjectRef(index);
}
writer.EndDictionaryEntry();
}
