private static void additionalTestPalette(string orig, string truecolor)
{
// covnert to true color 8 bits and check equality
PngReader pngr = FileHelper.CreatePngReader(orig);
PngChunkPLTE plte = pngr.GetMetadata().GetPLTE();
PngChunkTRNS trns = pngr.GetMetadata().GetTRNS();
string copy = TestsHelper.addSuffixToName(orig, "_tccopy");
bool alpha = trns != null;
ImageInfo im2 = new ImageInfo(pngr.ImgInfo.Cols, pngr.ImgInfo.Rows, 8, alpha);
PngWriter pngw = FileHelper.CreatePngWriter(copy, im2, true);
pngw.CopyChunksFirst(pngr, ChunkCopyBehaviour.COPY_ALL_SAFE);
int[] buf = null;
for (int row = 0; row < pngr.ImgInfo.Rows; row++)
{
ImageLine line = pngr.ReadRowInt(row);
buf = ImageLineHelper.Palette2rgb(line, plte, trns, buf);
pngw.WriteRowInt(buf, row);
}
pngr.End();
pngw.End();
TestsHelper.testEqual(copy, truecolor);
System.IO.File.Delete(copy);
}
/// <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");
}
static void testmirror(string orig, string origni, string truecolor)
{
string mirror = TestsHelper.addSuffixToName(orig, "_mirror");
string recov = TestsHelper.addSuffixToName(orig, "_recov");
long crc0 = 0;
bool interlaced;
bool palete;
{
PngReader pngr = FileHelper.CreatePngReader(orig);
palete = pngr.ImgInfo.Indexed;
PngHelperInternal.InitCrcForTests(pngr);
pngr.SetUnpackedMode(true);
interlaced = pngr.IsInterlaced();
PngWriter pngw = FileHelper.CreatePngWriter(mirror, pngr.ImgInfo, true);
pngw.SetFilterType(FilterType.FILTER_CYCLIC); // just to test all filters
pngw.CopyChunksFirst(pngr, ChunkCopyBehaviour.COPY_ALL);
pngw.SetUseUnPackedMode(true);
for (int row = 0; row < pngr.ImgInfo.Rows; row++)
{
ImageLine line = pngr.ReadRowInt(row);
mirrorLine(line);
pngw.WriteRow(line, row);
}
pngr.End();
crc0 = PngHelperInternal.GetCrctestVal(pngr);
pngw.CopyChunksFirst(pngr, ChunkCopyBehaviour.COPY_ALL);
pngw.End();
}
// mirror again, now with BYTE (if depth<16) and loading all rows
{
PngReader pngr2 = FileHelper.CreatePngReader(mirror);
pngr2.SetUnpackedMode(true);
PngWriter pngw = FileHelper.CreatePngWriter(recov, pngr2.ImgInfo, true);
pngw.SetFilterType(FilterType.FILTER_AGGRESSIVE);
pngw.CopyChunksFirst(pngr2, ChunkCopyBehaviour.COPY_ALL);
pngw.SetUseUnPackedMode(true);
ImageLines lines = pngr2.ImgInfo.BitDepth < 16 ? pngr2.ReadRowsByte() : pngr2
.ReadRowsInt();
for (int row = 0; row < pngr2.ImgInfo.Rows; row++)
{
ImageLine line = lines.GetImageLineAtMatrixRow(row);
mirrorLine(line);
pngw.WriteRow(line, row);
}
pngr2.End();
pngw.End();
}
// now check
if (!interlaced)
{
TestsHelper.testCrcEquals(recov, crc0);
}
else
{
TestsHelper.testEqual(recov, origni);
}
if (interlaced)
{
additionalTestInterlaced(orig, origni);
}
if (palete && System.IO.File.Exists(truecolor))
{
additionalTestPalette(orig, truecolor);
}
}