public void png_set_text(png_text text_ptr)
{
if (text_ptr.key == null || text_ptr.key == "")
{
Debug.WriteLine("Ignoring attempt to set empty text");
return;
}
if (text_ptr.compression <= 0)
{
text_ptr.lang = null;
text_ptr.lang_key = null;
}
if (text_ptr.text == null || text_ptr.text == "")
{
if (text_ptr.compression > 0)
{
text_ptr.compression = PNG_TEXT_COMPRESSION.ITXT_COMPRESSION_NONE;
}
else
{
text_ptr.compression = PNG_TEXT_COMPRESSION.NONE;
}
text_ptr.text = null;
}
if (info_ptr_text == null)
{
info_ptr_text = new List <png_text>();
}
info_ptr_text.Add(text_ptr);
}
// Writes the end of the PNG file. Texts and tIME.
public void png_write_end()
{
if ((mode & PNG_MODE.HAVE_IDAT) != PNG_MODE.HAVE_IDAT)
{
throw new PNG_Exception("No IDATs written into file");
}
// check to see if user has supplied a time chunk
if ((info_ptr_valid & PNG_INFO.tIME) == PNG_INFO.tIME)
{
png_write_tIME(info_ptr_mod_time);
}
// Check to see if we need to write text chunks
if (info_ptr_text != null)
{
for (int i = 0; i < info_ptr_text.Count; i++)
{
// an internationalized chunk?
if (info_ptr_text[i].compression > 0)
{
// write international chunk
png_write_iTXt(info_ptr_text[i].compression, info_ptr_text[i].key, info_ptr_text[i].lang, info_ptr_text[i].lang_key, info_ptr_text[i].text);
// Mark this chunk as written
png_text t = info_ptr_text[i];
t.compression = PNG_TEXT_COMPRESSION.NONE_WR;
info_ptr_text[i] = t;
}
// If we want a compressed text chunk
else if (info_ptr_text[i].compression == PNG_TEXT_COMPRESSION.zTXt)
{
// write compressed chunk
png_write_zTXt(info_ptr_text[i].key, info_ptr_text[i].text, info_ptr_text[i].compression);
// Mark this chunk as written
png_text t = info_ptr_text[i];
t.compression = PNG_TEXT_COMPRESSION.zTXt_WR;
info_ptr_text[i] = t;
}
else if (info_ptr_text[i].compression == PNG_TEXT_COMPRESSION.NONE)
{
// write uncompressed chunk
png_write_tEXt(info_ptr_text[i].key, info_ptr_text[i].text);
// Mark this chunk as written
png_text t = info_ptr_text[i];
t.compression = PNG_TEXT_COMPRESSION.NONE_WR;
info_ptr_text[i] = t;
}
}
}
mode |= PNG_MODE.AFTER_IDAT;
// write end of PNG file
png_write_IEND();
}
public uint png_get_text(ref png_text[] texts)
{
if(info_ptr_text==null||info_ptr_text.Count==0) return 0;
texts=info_ptr_text.ToArray();
return (uint)info_ptr_text.Count;
}
public void png_set_text(png_text[] text_ptr)
{
if(text_ptr==null||text_ptr.Length==0) return;
foreach(png_text text_ptr_ in text_ptr) png_set_text(text_ptr_);
}
public void png_set_text(png_text text_ptr)
{
if(text_ptr.key==null||text_ptr.key=="")
{
Debug.WriteLine("Ignoring attempt to set empty text");
return;
}
if(text_ptr.compression<=0)
{
text_ptr.lang=null;
text_ptr.lang_key=null;
}
if(text_ptr.text==null||text_ptr.text=="")
{
if(text_ptr.compression>0) text_ptr.compression=PNG_TEXT_COMPRESSION.ITXT_COMPRESSION_NONE;
else text_ptr.compression=PNG_TEXT_COMPRESSION.NONE;
text_ptr.text=null;
}
if(info_ptr_text==null) info_ptr_text=new List<png_text>();
info_ptr_text.Add(text_ptr);
}
