public static void showChunks(String file)
{
PngReader pngr = FileHelper.CreatePngReader(file);
pngr.MaxTotalBytesRead = 1024 * 1024 * 1024L * 3; // 3Gb!
pngr.ReadSkippingAllRows();
Console.Out.WriteLine(pngr.ToString());
Console.Out.WriteLine(pngr.GetChunksList().ToStringFull());
}
public static void testRead(String file)
{
// register with factory chunk
PngChunk.FactoryRegister(PngChunkSERI.ID, typeof(PngChunkSERI));
// read all file
PngReader pngr = FileHelper.CreatePngReader(file);
pngr.ReadSkippingAllRows();
pngr.End();
// we assume there can be at most one chunk of this type...
PngChunk chunk = pngr.GetChunksList().GetById1(PngChunkSERI.ID); // This would work even if not registered, but then PngChunk would be of type PngChunkUNKNOWN
Console.Out.WriteLine(chunk);
// the following would fail if we had not register the chunk
PngChunkSERI chunkprop = (PngChunkSERI)chunk;
string name = chunkprop.GetObj().name;
int age = chunkprop.GetObj().age;
Console.Out.WriteLine("Done. Name: " + name + " age=" + age);
}
public static ResourceDictionary LoadFromPng(string FileName)
{
// read all file
PngReader pngr = FileHelper.CreatePngReader(FileName);
pngr.ReadSkippingAllRows();
pngr.End();
// we assume there can be at most one chunk of this type...
PngChunk chunk = pngr.GetChunksList().GetById1(PngChunkSKIN.ID); // This would work even if not registered, but then PngChunk would be of type PngChunkUNKNOWN
if (chunk != null)
{
// the following would fail if we had not register the chunk
PngChunkSKIN chunkprop = (PngChunkSKIN)chunk;
ParserContext pc = new ParserContext();
pc.XamlTypeMapper = XamlTypeMapper.DefaultMapper;
// pc.XmlSpace
//MimeObjectFactory s;
var rd1 = (ResourceDictionary)XamlReader.Parse(chunkprop.Content);
// Application.Current.Resources.MergedDictionaries.Add(rd1);
// var rd2 = (ResourceDictionary)XamlReader.Parse(chunkprop.Content);
//// Application.Current.Resources.MergedDictionaries.Add(rd2);
// if (rd1 == rd2) {
// }
return(rd1);
}
else
{
return(null);
}
}
/// <summary>
/// Writes a new file with several text chunks, reads it back and compares
/// </summary>
public static void test()
{
Dictionary <string, string> texts = new Dictionary <String, String>();
texts.Add("key1", "val");
texts.Add("empty1", "");
texts.Add("unicode1", "Hernán");
texts.Add("zero1", "Hola\0chau");
texts.Add("key2", "val");
texts.Add("empty2", "");
texts.Add("unicode2", "Hernán");
texts.Add("zero2", "Hola\0chau");
texts.Add("key3", "val");
texts.Add("empty3", "");
texts.Add("unicode3", "Hernán");
texts.Add("zero3", "Hola\0chau");
texts.Add("nolatin1", "Hernán\u1230");
String suffix = "text";
PngWriter png = TestsHelper.prepareFileTmp(suffix);
png.GetMetadata().SetText("key1", texts["key1"], false, false);
png.GetMetadata().SetText("key2", texts["key2"], true, false);
png.GetMetadata().SetText("key3", texts["key3"], true, true);
png.GetMetadata().SetText("empty1", texts["empty1"], false, false);
png.GetMetadata().SetText("empty2", texts["empty2"], true, false);
png.GetMetadata().SetText("empty3", texts["empty3"], true, true);
png.GetMetadata().SetText("unicode1", texts["unicode1"], false, false);
png.GetMetadata().SetText("unicode2", texts["unicode2"], true, false);
png.GetMetadata().SetText("unicode3", texts["unicode3"], true, true);
png.GetMetadata().SetText("nolatin1", texts["nolatin1"], false, false);
png.GetMetadata().SetText("zero1", texts["zero1"], false, false);
png.GetMetadata().SetText("zero2", texts["zero2"], true, false);
png.GetMetadata().SetText("zero3", texts["zero3"], true, true);
TestsHelper.endFileTmp(png);
PngReader pngr = TestsHelper.getReaderTmp(suffix);
pngr.ReadSkippingAllRows();
int ok = 0;
foreach (PngChunk c in pngr.GetChunksList().GetChunks())
{
if (!ChunkHelper.IsText(c))
{
continue;
}
ok++;
PngChunkTextVar ct = (PngChunkTextVar)c;
String key = ct.GetKey();
String val = ct.GetVal();
Console.WriteLine(c.Id + " chunk. Key:" + key + " val='" + val + "'");
if (!val.Equals(texts[key]))
{
Console.WriteLine("ERROR: expected '" + texts[key] + "' got '" + val
+ "' key=" + key + " id=" + c.Id);
}
}
if (ok != texts.Keys.Count)
{
throw new Exception("number of text chunks does not coincide");
}
Console.WriteLine("done");
}
