/// <summary>Creates a font and adds it to the context.</summary>
/// <param name="fontFamily">the font family</param>
/// <param name="src">the source of the font</param>
/// <param name="src">the unicode range</param>
/// <returns>true, if successful</returns>
private bool CreateFont(String fontFamily, FontFace.FontFaceSrc src, Range uniRange) {
if (!SupportedFontFormat(src.format)) {
return false;
}
else {
if (src.isLocal) {
// to method with lazy initialization
ICollection<FontInfo> fonts = context.GetFontProvider().GetFontSet().Get(src.src);
if (fonts.Count > 0) {
foreach (FontInfo fi in fonts) {
context.AddTemporaryFont(fi, fontFamily);
}
return true;
}
else {
return false;
}
}
else {
try {
// Cache at resource resolver level only, at font level we will create font in any case.
// The instance of fontProgram will be collected by GC if the is no need in it.
byte[] bytes = context.GetResourceResolver().RetrieveBytesFromResource(src.src);
if (bytes != null) {
FontProgram fp = FontProgramFactory.CreateFont(bytes, false);
context.AddTemporaryFont(fp, PdfEncodings.IDENTITY_H, fontFamily, uniRange);
return true;
}
}
catch (Exception) {
}
return false;
}
}
}
private Range ResolveUnicodeRange(IList<CssDeclaration> declarations) {
Range range = null;
foreach (CssDeclaration descriptor in declarations) {
if ("unicode-range".Equals(descriptor.GetProperty())) {
range = CssUtils.ParseUnicodeRange(descriptor.GetExpression());
}
}
return range;
}
private void AddAllAvailableFonts(Range rangeToLoad)
{
AddShippedFreeFonts(rangeToLoad);
foreach (byte[] fontData in calligraphyFontsTempList)
{
AddFont(fontData, null);
}
calligraphyFontsTempList = null;
}
/// <summary>Adds the shipped free fonts.</summary>
private void AddShippedFreeFonts(Range rangeToLoad)
{
foreach (String fontName in SHIPPED_FONT_NAMES)
{
try {
using (Stream stream = ResourceUtil.GetResourceStream(SHIPPED_FONT_RESOURCE_PATH + fontName)) {
byte[] fontProgramBytes = StreamUtil.InputStreamToArray(stream);
AddFont(fontProgramBytes, null, rangeToLoad);
}
}
catch (Exception) {
LOGGER.Error(iText.Html2pdf.LogMessageConstant.ERROR_LOADING_FONT);
}
}
}
/// <summary>Add temporary font from @font-face.</summary>
/// <param name="fontProgram">the font program</param>
/// <param name="encoding">the encoding</param>
/// <param name="alias">the alias</param>
/// <param name="unicodeRange">the unicode range</param>
public virtual void AddTemporaryFont(FontProgram fontProgram, String encoding, String alias, Range unicodeRange
)
{
if (tempFonts == null)
{
tempFonts = new FontSet();
}
tempFonts.AddFont(fontProgram, encoding, alias, unicodeRange);
}