public static void tile(String orig, String dest, int factor)
{
if (orig.Equals(dest))
{
throw new PngjException("input and output file cannot coincide");
}
if (factor < 2 || factor > 100)
{
throw new PngjException("bad factor ");
}
PngReader pngr = FileHelper.CreatePngReader(orig);
var x = pngr.ImgInfo;
PngWriter pngw = FileHelper.CreatePngWriter(dest, pngr.ImgInfo, true);
pngr.SetUnpackedMode(true); // we dont want to do the unpacking ourselves, we want a sample per array element
pngw.SetUseUnPackedMode(true); // not really necesary here, as we pass the ImageLine, but anyway...
pngw.CopyChunksFirst(pngr, ChunkCopyBehaviour.COPY_ALL_SAFE);
for (int row = 0; row < pngr.ImgInfo.Rows; row++)
{
ImageLine l1 = pngr.ReadRowInt(row);
mirrorLineInt(pngr.ImgInfo, l1.Scanline);
pngw.WriteRow(l1, row);
}
pngw.CopyChunksLast(pngr, ChunkCopyBehaviour.COPY_ALL_SAFE);
pngw.End();
}
private static void additionalTestInterlaced(string orig, string origni)
{
// tests also read/write in packed format
PngReader pngr = FileHelper.CreatePngReader(orig);
string copy = TestsHelper.addSuffixToName(orig, "_icopy");
pngr.SetUnpackedMode(false);
PngWriter pngw = FileHelper.CreatePngWriter(copy, pngr.ImgInfo, true);
pngw.CopyChunksFirst(pngr, ChunkCopyBehaviour.COPY_ALL);
pngw.SetUseUnPackedMode(false);
Random random = new Random();
bool useByte = random.NextDouble() > 0.5 && pngr.ImgInfo.BitDepth < 16;
for (int row = 0; row < pngr.ImgInfo.Rows; row++)
{
if (useByte)
{
ImageLine line = pngr.ReadRowByte(row);
pngw.WriteRow(line, row);
}
else
{
ImageLine line = pngr.ReadRowInt(row);
pngw.WriteRow(line, row);
}
}
pngr.End();
pngw.End();
TestsHelper.testEqual(copy, origni);
System.IO.File.Delete(copy);
}
public static void addMetadata(String origFilename, Dictionary <string, string> data)
{
String destFilename = "tmp.png";
PngReader pngr = FileHelper.CreatePngReader(origFilename); // or you can use the constructor
PngWriter pngw = FileHelper.CreatePngWriter(destFilename, pngr.ImgInfo, true); // idem
//Console.WriteLine(pngr.ToString()); // just information
int chunkBehav = ChunkCopyBehaviour.COPY_ALL_SAFE; // tell to copy all 'safe' chunks
pngw.CopyChunksFirst(pngr, chunkBehav); // copy some metadata from reader
foreach (string key in data.Keys)
{
PngChunk chunk = pngw.GetMetadata().SetText(key, data[key]);
chunk.Priority = true;
}
int channels = pngr.ImgInfo.Channels;
if (channels < 3)
{
throw new Exception("This example works only with RGB/RGBA images");
}
for (int row = 0; row < pngr.ImgInfo.Rows; row++)
{
ImageLine l1 = pngr.ReadRowInt(row); // format: RGBRGB... or RGBARGBA...
pngw.WriteRow(l1, row);
}
pngw.CopyChunksLast(pngr, chunkBehav); // metadata after the image pixels? can happen
pngw.End(); // dont forget this
pngr.End();
File.Delete(origFilename);
File.Move(destFilename, origFilename);
}
public void LoadFromP8PNG(Stream stream)
{
PngReader reader = new PngReader(stream);
if (!validatePNG(reader.ImgInfo))
{
throw new BadImageFormatException("Bad Cart");
}
int offset = 0;
for (int row = 0; row < reader.ImgInfo.Rows && offset < CART_SIZE; row++)
{
ImageLine line = reader.ReadRowInt(row);
for (int col = 0; col < line.ImgInfo.Cols && offset < CART_SIZE; col++)
{
rom[offset] = decodeBytes(line.Scanline, col * 4);
offset += 1;
}
}
Version = rom[0x8000];
Build = (rom[0x8001] << 24) + (rom[0x8002] << 16) + (rom[0x8003] << 8) + rom[0x8004];
/*
* Debug.Log(rom[0]);
* Debug.Log(rom[1]);
* Debug.Log(rom[2]);
* Debug.Log(rom[3]);
*/
reader.End();
}
public static void doit(String orig)
{
string copy = TestsHelper.addSuffixToName(orig, "_tc");
PngReader pngr = FileHelper.CreatePngReader(orig);
if (!pngr.ImgInfo.Indexed)
{
throw new Exception("Not indexed image");
}
PngChunkPLTE plte = pngr.GetMetadata().GetPLTE();
PngChunkTRNS trns = pngr.GetMetadata().GetTRNS(); // transparency metadata, can be null
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);
}
pngw.CopyChunksLast(pngr, ChunkCopyBehaviour.COPY_ALL_SAFE);
pngr.End();
pngw.End();
Console.WriteLine("True color: " + copy);
}
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 (orig[11] != 'i')
{
TestsHelper.testCrcEquals(recov, crc0);
}
//if (interlaced)
// additionalTestInterlaced(orig, origni);
//if (palete && System.IO.File.Exists(truecolor))
// additionalTestPalette(orig, truecolor);
}
//---------------------------------------------------------------------
public void foreachPixel(onPixel fun)
{
for (int y = 0; y < height; ++y)
{
// ImageLine的Scanline出来的行数据，表示RGBA
ImageLine pngLine = mPngReader.ReadRowInt(y);
int[] pngLineArray = pngLine.Scanline;
for (int x = 0; x < width; ++x)
{
fun(_isBlackColor(pngLineArray, x), x, y);
}
}
}
public static Texture2D FromPng(Stream stream, Texture2D texture = null)
{
var pngr = new PngReader(stream);
var ms = new MemoryStream();
int channels = pngr.ImgInfo.Channels;
int w = pngr.ImgInfo.Cols;
int h = pngr.ImgInfo.Rows;
var bytes = new byte[w * h * channels];
int count = 0;
for (int row = 0; row < pngr.ImgInfo.Rows; row++)
{
ImageLine l1 = pngr.ReadRowInt(row); // Format: RGBRGB... or RGBARGBA...
for (int j = 0; j < pngr.ImgInfo.Cols; j++)
{
byte R = (byte)l1.Scanline[j * channels];
byte G = (byte)l1.Scanline[j * channels + 1];
byte B = (byte)l1.Scanline[j * channels + 2];
byte A = (byte)l1.Scanline[j * channels + 3];
bytes[count++] = B;
bytes[count++] = G;
bytes[count++] = R;
bytes[count++] = A;
}
}
ms.Close();
pngr.End();
if (texture == null)
{
texture = new Texture2D(GameClass.Graphics, w, h);
}
texture.SetData(bytes);
return(texture);
}
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);
}
private unsafe void ReadPng(Stream bitmapStream, BitmapCreateOptions createOptions, BitmapCacheOption cacheOption)
{
var pngr = new PngReader(bitmapStream);
if (pngr.ImgInfo.Channels > 4 || pngr.ImgInfo.Channels < 3 || pngr.ImgInfo.BitDepth
!= 8)
{
throw new NotSupportedException("PNG must be RGB8/RGBA8");
}
var channels = pngr.ImgInfo.Channels;
var data = new byte[pngr.ImgInfo.Cols * pngr.ImgInfo.Rows * channels];
var alpha = (channels == 4);
if (alpha)
{
fixed(byte *dataStart = &data[0])
{
var d = dataStart;
for (var i = 0; i < pngr.ImgInfo.Rows; i++)
{
var line = pngr.ReadRowByte(i);
for (var j = 0; j < pngr.ImgInfo.Cols; j++)
{
var j2 = j * channels;
* d++ = line.ScanlineB[j2 + 2];
* d++ = line.ScanlineB[j2 + 1];
* d++ = line.ScanlineB[j2];
* d++ = line.ScanlineB[j2 + 3];
}
}
Source = BitmapSource.Create(pngr.ImgInfo.Cols, pngr.ImgInfo.Rows, 100, 100, PixelFormats.Bgra32, null, (IntPtr)dataStart, pngr.ImgInfo.Cols * pngr.ImgInfo.Rows * channels,
pngr.ImgInfo.Cols * channels);
}
//for (int i = 0; i < pngr.ImgInfo.Rows; i++)
//{
// var i1 = i * pngr.ImgInfo.Cols * channels;
// ImageLine line = pngr.ReadRowInt(i);
// for (int j = 0; j < pngr.ImgInfo.Cols; j++)
// {
// var j1 = i1 + j * channels;
// var j2 = j * channels;
// data[j1+2] = (byte)line.Scanline[j2++];
// data[j1 + 1] = (byte)line.Scanline[j2++];
// data[j1] = (byte)line.Scanline[j2++];
// data[j1 + 3] = (byte)line.Scanline[j2];
// }
//}
//Source = BitmapSource.Create(pngr.ImgInfo.Cols, pngr.ImgInfo.Rows, 100, 100, PixelFormats.Bgra32, null, data, pngr.ImgInfo.Cols * channels);
//Source = BitmapSource.Create(pngr.ImgInfo.Cols, pngr.ImgInfo.Rows, 100, 100, PixelFormats.Bgra32, null, data, stride);
}
else
{
fixed(byte *dataStart = &data[0])
{
var d = dataStart;
for (var i = 0; i < pngr.ImgInfo.Rows; i++)
{
var line = pngr.ReadRowInt(i);
for (var j = 0; j < pngr.ImgInfo.Cols; j++)
{
var j2 = j * channels;
* d++ = (byte)line.Scanline[j2 + 2];
* d++ = (byte)line.Scanline[j2 + 1];
* d++ = (byte)line.Scanline[j2];
}
}
Source = BitmapSource.Create(pngr.ImgInfo.Cols, pngr.ImgInfo.Rows, 100, 100, PixelFormats.Bgr24, null, data, pngr.ImgInfo.Cols * channels);
}
}
pngr.End();
//double dpi = 96;
//int width = 128;
//int height = 128;
//byte[] pixelData = new byte[width * height];
//for (int y = 0; y < height; ++y)
//{
// int yIndex = y * width;
// for (int x = 0; x < width; ++x)
// {
// pixelData[x + yIndex] = (byte)(x + y);
// }
//}
//Source = BitmapSource.Create(width, height, dpi, dpi,
// PixelFormats.Gray8, null, pixelData, width);
//Source = source;
Source.Freeze();
}
/// <summary> Create Color[] from PNG file </summary>
public static ReadColorsResult ReadColors
(
string filePath
)
{
ReadColorsResult results = new ReadColorsResult {
pixels = null,
width = -1,
height = -1,
textureFormatInfered = 0
};
PngReader reader = null;
try
{
reader = FileHelper.CreatePngReader(filePath);
var info = reader.ImgInfo;
results.height = info.Rows;
results.width = info.Cols;
results.pixels = new Color[results.width * results.height];
int channels = info.Channels;
int bitDepth = info.BitDepth;
if (info.Indexed)
{
throw new System.NotImplementedException("indexed png not implemented");
}
//select appropriate texture format:
results.textureFormatInfered = GetTextureFormat(bitDepth, channels);
//create pixel array:
for (int row = 0; row < results.height; row++)
{
ImageLine imageLine = reader.ReadRowInt(row);
var scanline = imageLine.Scanline;
if (imageLine.SampleType == ImageLine.ESampleType.INT)
{
for (int col = 0; col < results.width; col++)
{
var color = new Color();
for (int ch = 0; ch < channels; ch++)
{
int raw = scanline[col * channels + ch];
float rawMax = GetBitDepthMaxValue(bitDepth);
float value = (float)raw / rawMax;
//
if (ch == 0)
{
color.r = value;
}
else if (ch == 1)
{
color.g = value;
}
else if (ch == 2)
{
color.b = value;
}
else if (ch == 3)
{
color.a = value;
}
else
{
throw new System.Exception($"channel { ch } not implemented");
}
}
results.pixels[IndexPngToTexture(row, col, results.height, results.width)] = color;
}
}
else
{
throw new System.Exception($"imageLine.SampleType { imageLine.SampleType } not implemented");
}
}
}
catch (System.Exception ex)
{
Debug.LogException(ex);
if (results.pixels == null)
{
results.width = 2;
results.height = 2;
results.pixels = new Color[results.width * results.height];
}
if (results.textureFormatInfered == 0)
{
results.textureFormatInfered = TextureFormat.RGBA32;
}
}
finally
{
if (reader != null)
{
reader.End();
}
}
return(results);
}
public IEnumerable <RGBA> EnRGBA()
{
PngChunkPLTE oplte = null;
PngChunkTRNS otrns = null; // transparency metadata, can be null
if (pngr.ImgInfo.Indexed)
{
oplte = pngr.GetMetadata().GetPLTE();
otrns = pngr.GetMetadata().GetTRNS();
}
for (var row = 0; row < pngr.ImgInfo.Rows; row++)
{
var line = pngr.ReadRowInt(row);
if (pngr.ImgInfo.Indexed)
{
var rgrgba = ImageLineHelper.Palette2rgb(line, oplte, otrns, null);
for (var irgba = 0; irgba < rgrgba.Length;)
{
yield return(new RGBA
{
r = rgrgba[irgba++],
g = rgrgba[irgba++],
b = rgrgba[irgba++],
a = (otrns != null ? rgrgba[irgba++] : 255),
});
}
}
else
{
if (pngr.ImgInfo.Packed)
{
line = line.unpackToNewImageLine();
}
for (var col = 0; col < pngr.ImgInfo.Cols; col++)
{
switch (pngr.ImgInfo.Channels)
{
case 1:
yield return(new RGBA
{
r = Read8(col, line),
g = Read8(col, line),
b = Read8(col, line),
});
break;
case 2:
yield return(new RGBA
{
r = Read8(col * 2, line),
g = Read8(col * 2, line),
b = Read8(col * 2, line),
a = Read8(col * 2 + 1, line),
});
break;
case 3:
yield return(new RGBA
{
r = Read8(col * 3, line),
g = Read8(col * 3 + 1, line),
b = Read8(col * 3 + 2, line),
});
break;
case 4:
yield return(new RGBA
{
r = Read8(col * 4, line),
g = Read8(col * 4 + 1, line),
b = Read8(col * 4 + 2, line),
a = Read8(col * 4 + 3, line),
});
break;
}
}
}
}
}