public void ColorRGB24_Accessor()
{
byte r = (byte)NextComponent(byte.MaxValue);
byte g = (byte)NextComponent(byte.MaxValue);
byte b = (byte)NextComponent(byte.MaxValue);
ColorRGB24 v = new ColorRGB24(r, g, b);
float c;
Assert.DoesNotThrow(() => c = v[0]);
Assert.DoesNotThrow(() => c = v[1]);
Assert.DoesNotThrow(() => c = v[2]);
Assert.Throws <IndexOutOfRangeException>(() => c = v[+3]);
Assert.Throws <IndexOutOfRangeException>(() => c = v[-1]);
Assert.DoesNotThrow(() => v[0] = 1.0f);
Assert.DoesNotThrow(() => v[1] = 1.0f);
Assert.DoesNotThrow(() => v[2] = 1.0f);
Assert.Throws <IndexOutOfRangeException>(() => v[+3] = 0.0f);
Assert.Throws <IndexOutOfRangeException>(() => v[-1] = 0.0f);
Assert.DoesNotThrow(() => v[2] = 0.0f);
Assert.DoesNotThrow(() => v[2] = 1.0f);
Assert.Throws <InvalidOperationException>(() => v[2] = -1.0f);
Assert.Throws <InvalidOperationException>(() => v[2] = +1.1f);
}
public void ColorRGB24_CastFromColor()
{
const double Epsilon = 0.25;
Random random = new Random();
double r = NextComponent(random, 1.0);
double g = NextComponent(random, 1.0);
double b = NextComponent(random, 1.0);
Color c = Color.FromArgb(byte.MaxValue, (int)(r * byte.MaxValue), (int)(g * byte.MaxValue), (int)(b * byte.MaxValue));
ColorRGB24 v = (ColorRGB24)c;
Assert.AreEqual((float)r, v[0], Epsilon);
Assert.AreEqual((float)g, v[1], Epsilon);
Assert.AreEqual((float)b, v[2], Epsilon);
// Not influenced by alpha
c = Color.FromArgb(0, (int)(r * byte.MaxValue), (int)(g * byte.MaxValue), (int)(b * byte.MaxValue));
v = (ColorRGB24)c;
Assert.AreEqual((float)r, v[0], Epsilon);
Assert.AreEqual((float)g, v[1], Epsilon);
Assert.AreEqual((float)b, v[2], Epsilon);
}
public void ColorRGB24_CastToRGBA()
{
byte r = (byte)NextComponent(byte.MaxValue);
byte g = (byte)NextComponent(byte.MaxValue);
byte b = (byte)NextComponent(byte.MaxValue);
ColorRGB24 v = new ColorRGB24(r, g, b);
ColorRGBA32 vRGBA = v;
}
public void ColorRGB24_PixelType()
{
byte r = (byte)NextComponent(byte.MaxValue);
byte g = (byte)NextComponent(byte.MaxValue);
byte b = (byte)NextComponent(byte.MaxValue);
ColorRGB24 v = new ColorRGB24(r, g, b);
Assert.AreNotEqual(PixelLayout.None, v.PixelType);
}
public void ColorRGB24_TestConstructor1()
{
byte r = (byte)byte.MaxValue;
byte g = (byte)byte.MaxValue;
byte b = (byte)byte.MaxValue;
ColorRGB24 v = new ColorRGB24(r, g, b);
Assert.AreEqual(r, v.Red);
Assert.AreEqual(g, v.Green);
Assert.AreEqual(b, v.Blue);
}
public void ColorRGB24_CastToVertex4()
{
byte r = (byte)NextComponent(byte.MaxValue);
byte g = (byte)NextComponent(byte.MaxValue);
byte b = (byte)NextComponent(byte.MaxValue);
ColorRGB24 v = new ColorRGB24(r, g, b);
Vertex3ub vArray = v;
Assert.AreEqual(r, vArray.x);
Assert.AreEqual(g, vArray.y);
Assert.AreEqual(b, vArray.z);
}
public void ColorRGB24_CastToRGBA()
{
byte r = (byte)NextComponent(byte.MaxValue);
byte g = (byte)NextComponent(byte.MaxValue);
byte b = (byte)NextComponent(byte.MaxValue);
ColorRGB24 v = new ColorRGB24(r, g, b);
ColorRGBA32 vRGBA = v;
Assert.AreEqual(v.Red, vRGBA.Red);
Assert.AreEqual(v.Green, vRGBA.Green);
Assert.AreEqual(v.Blue, vRGBA.Blue);
Assert.AreEqual(byte.MaxValue, vRGBA.Alpha);
}
public void ColorRGB24_CastToArray()
{
byte r = (byte)NextComponent(byte.MaxValue);
byte g = (byte)NextComponent(byte.MaxValue);
byte b = (byte)NextComponent(byte.MaxValue);
ColorRGB24 v = new ColorRGB24(r, g, b);
byte[] vArray = v;
Assert.AreEqual(3, vArray.Length);
Assert.AreEqual(r, vArray[0]);
Assert.AreEqual(g, vArray[1]);
Assert.AreEqual(b, vArray[2]);
}
private BitmapRGB24 ApplyEffectRGB24(BitmapRGB24 input)
{
ColorRGB24[] pix = new ColorRGB24[input.Size.Elements];
var c = this.Contrast;
for (int i = 0; i < pix.Length; i++)
{
pix[i].Red = (byte)((pix[i].Red - 127) * c);
pix[i].Green = (byte)((pix[i].Green - 127) * c);
pix[i].Blue = (byte)((pix[i].Blue - 127) * c);
}
return(new BitmapRGB24(input.Size, pix));
}
private void BoxBlurRGB24(BitmapRGB24 input, BitmapRGB24 output, BitmapRGB32 mask = null)
{
Contract.Requires(input != null);
Contract.Requires(output != null);
Contract.Requires(input.Width == output.Width);
Contract.Requires(input.Height == output.Height);
int radius = this.Radius;
int w = input.Width;
int h = input.Height;
var bmp = output;
var pix = bmp.Pixels;
float div = (float)Math.Pow((radius * 2 + 1), 2);
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
var tr = 0.0;
var tg = 0.0;
var tb = 0.0;
for (int ky = -radius; ky <= radius; ky++)
{
for (int kx = -radius; kx <= radius; kx++)
{
var px = Math.Max(Math.Min(x + kx, w - 1), 0);
var py = Math.Max(Math.Min(y + ky, h - 1), 0);
var p = input[px, py];
tr += p.Red;
tg += p.Green;
tb += p.Blue;
//div += 1;
}
}
//total.Alpha = 1.0f;
bmp[x, y] = new ColorRGB24((byte)(tr / 255.0 * (255.0 / div)),
(byte)(tg / 255.0 * (255.0 / div)), (byte)(tb / 255.0 * (255.0 / div)));
}
}
}
public override void Decode(Frame output)
{
int width = 0, height = 0;
byte depth = 0;
PNGColorType colorType = PNGColorType.TruecolorWithAlpha;
Frame result = output;
// TODO: Verify signature
// Pull the PNG into a data buffer.
if (this.Bitstream == null || this.Bitstream.Length < 1)
return;
var bytes = new byte[this.Bitstream.Length];
this.Bitstream.Read(bytes, 0, bytes.Length);
var buf = new DataBuffer(bytes, ByteOrder.BigEndian);
var signature = buf.ReadInt64();
if (signature != PNGCodec.BitstreamSignature)
{
}
bool ihdrDone = false;
//bool iendDone = false;
using (var pixelStream = new MemoryStream())
{
var zout = new ZOutputStream(pixelStream);
// Start reading chunks.
while (buf.Available > 0)
{
int length = buf.ReadInt32();
string chunk = string.Concat((char)buf.ReadByte(), (char)buf.ReadByte(), (char)buf.ReadByte(), (char)buf.ReadByte());
switch (chunk)
{
case "IHDR":
if (ihdrDone)
throw new NotImplementedException();
else
ihdrDone = true;
if (length != 13)
throw new NotImplementedException();
width = buf.ReadInt32();
height = buf.ReadInt32();
depth = buf.ReadByte();
colorType = (PNGColorType)buf.ReadByte();
byte xmethod = buf.ReadByte();
PNGFilterMethod filterMethod = (PNGFilterMethod)buf.ReadByte();
byte interlaceMethod = buf.ReadByte();
break;
case "IDAT":
var data = buf.ReadBytes(length);
zout.Write(data, 0, data.Length);
break;
default:
Console.WriteLine("Skipping unknown chunk \"{0}\" in PNG bitstream at offset {1}", chunk, (buf.Position - 8).ToString("X"));
buf.Position += (length > buf.Available) ? buf.Available : length;
break;
}
int crc32 = buf.ReadInt32();
}
if (depth == 8)
{
if (colorType == PNGColorType.TruecolorWithAlpha)
{
//var pd = new byte[width * height * 4];
var pd = new byte[pixelStream.Length];
pixelStream.Position = 0;
pixelStream.Read(pd, 0, pd.Length);
ColorRGB32[] pix = new ColorRGB32[width * height];
ColorRGB32 p = new ColorRGB32();
//File.WriteAllBytes("dump.bin", pd);
for (int i = 0, n = 0; i < pix.Length; i++)
{
if (i % width == 0)
n++;
p.Red = pd[n++];
p.Green = pd[n++];
p.Blue = pd[n++];
p.Alpha = pd[n++];
pix[i] = p;
}
result.Video[0] = new BitmapRGB32(width, height, pix);
}
else if (colorType == PNGColorType.Truecolor)
{
//var pd = new byte[width * height * 3];
var pd = new byte[pixelStream.Length];
pixelStream.Position = 0;
pixelStream.Read(pd, 0, pd.Length);
ColorRGB24[] pix = new ColorRGB24[width * height];
ColorRGB24 p = new ColorRGB24();
//File.WriteAllBytes("dump.bin", pd);
for (int i = 0, n = 0; i < pix.Length; i++)
{
if (i % width == 0)
n++;
p.Red = pd[n++];
p.Green = pd[n++];
p.Blue = pd[n++];
pix[i] = p;
}
result.Video[0] = new BitmapRGB24(width, height, pix);
}
else
{
throw new NotImplementedException();
}
}
else
{
throw new NotImplementedException();
}
}
}
private void DecodeBitmap()
{
var dc = this.context;
if (dc.Stage < TGADecodeStage.FooterDecoded)
{
this.DecodeFooter(dc);
}
var header = dc.Header;
// Syntax sugar
int w = dc.Header.Width;
int h = dc.Header.Height;
if (w < 1 || h < 1)
{
throw new NotImplementedException();
}
if (header.BitsPerPixel % 8 != 0)
{
throw new NotImplementedException("BitsPerPixel not multiple of 8");
}
// Number of bytes per scanline
int stride = header.Width * (header.BitsPerPixel / 8);
// Read all the bytes that contain pixel data
var data = new byte[dc.PixelDataLength];
this.Bitstream.Seek(dc.PixelDataOffset, SeekOrigin.Begin);
this.Bitstream.Read(data, 0, data.Length);
if (header.ColorMapType == TGAColorMapType.ColorMapped) // Read color map data
{
throw new NotImplementedException();
}
else if (header.ImageType == TGAImageType.UncompressedTrueColor)
{
if (header.BitsPerPixel == 16)
{
throw new NotImplementedException(); // TODO: Implement support for 16-bit TGA decoding.
}
else if (header.BitsPerPixel == 24)
{
// Create an array of all the pixels in the bitmap (width x height).
var pixels = new ColorRGB24[w * h];
// ...and assign it to the Bitmap that will eventually be returned.
dc.DecodedBitmap = new BitmapRGB24(w, h, pixels);
var n = -1;
if (dc.PixelOrder == TGAPixelOrder.BottomLeft)
{
var line = new ColorRGB24[w];
for (int y = h; y > 0; --y)
{
for (int x = 0; x < line.Length; ++x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
}
line.CopyTo(pixels, (y - 1) * line.Length);
}
}
else if (dc.PixelOrder == TGAPixelOrder.BottomRight)
{
var line = new ColorRGB24[w];
// BTT + Right-to-Left (RTL) pixel order.
for (int y = h; y > 0; --y)
{
// Iterate over the pixels in the scanline from right-to-left.
for (int x = line.Length - 1; x >= 0; --x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
}
line.CopyTo(pixels, (y - 1) * line.Length);
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopLeft)
{
// Top-to-bottom (TTB) + LTR pixel order.
for (int i = 0; i < pixels.Length; i++)
{
// All pixels can be decoded in one pass; TTB + LTR is the way bitmaps are laid out in memory.
pixels[i].Blue = data[++n];
pixels[i].Green = data[++n];
pixels[i].Red = data[++n];
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopRight)
{
var line = new ColorRGB24[w];
for (int y = 0; y < h; ++y)
{
for (int x = line.Length - 1; x >= 0; --x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
}
line.CopyTo(pixels, y * line.Length);
}
}
else
{
throw new NotImplementedException();
}
}
else if (header.BitsPerPixel == 32) // Same as above, plus alpha channel.
{
// Create an array of all the pixels in the bitmap (width x height).
var pixels = new ColorRGB32[w * h];
// ...and assign it to the Bitmap that will eventually be returned.
dc.DecodedBitmap = new BitmapRGB32(w, h, pixels);
int n = -1;
var line = new ColorRGB32[w];
// Most common scanline direction first; TGA stores scanlines bottom-to-top by default.
if (dc.PixelOrder == TGAPixelOrder.BottomLeft)
{
// Bottom-to-top (BTT) + Left-to-right (LTR) pixel order.
for (int y = h; y > 0; --y)
{
for (int x = 0; x < line.Length; ++x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
line[x].Alpha = data[++n];
}
line.CopyTo(pixels, (y - 1) * line.Length);
}
}
else if (dc.PixelOrder == TGAPixelOrder.BottomRight)
{
for (int y = h; y > 0; --y)
{
// Iterate over the pixels in the scanline from right-to-left.
for (int x = line.Length - 1; x >= 0; --x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
line[x].Alpha = data[++n];
}
line.CopyTo(pixels, (y - 1) * line.Length);
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopLeft)
{
for (int i = 0; i < pixels.Length; ++i)
{
// All pixels can be decoded in one pass; TTB + LTR is the way bitmaps are laid out in memory.
pixels[i].Blue = data[++n];
pixels[i].Green = data[++n];
pixels[i].Red = data[++n];
pixels[i].Alpha = data[++n];
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopRight)
{
for (int y = 0; y < h; ++y)
{
for (int x = line.Length - 1; x >= 0; --x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
line[x].Alpha = data[++n];
}
line.CopyTo(pixels, y * line.Length);
}
}
}
}
else if (header.ImageType == TGAImageType.RunLengthEncodedTrueColor)
{
int n = -1;
bool raw = false;
byte p;
if (header.BitsPerPixel == 16)
{
throw new NotImplementedException();
}
if (header.BitsPerPixel == 24)
{
// Create an array of all the pixels in the bitmap (width x height).
var pixels = new ColorRGB24[w * h];
// ...and assign it to the Bitmap that will eventually be returned.
dc.DecodedBitmap = new BitmapRGB24(w, h, pixels);
ColorRGB24 px = new ColorRGB24();
// Operate on a line-by-line basis; RLE packets will never wrap from one scanline to another.
var line = new ColorRGB24[w];
// Most common scanline direction first; TGA stores scanlines bottom-to-top by default.
if (dc.PixelOrder == TGAPixelOrder.BottomLeft)
{
for (int y = h; y > 0; --y)
{
for (int x = 0, e = 0; x < line.Length; ++x, --e)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
line[x] = px;
}
line.CopyTo(pixels, (y - 1) * w);
}
}
else if (dc.PixelOrder == TGAPixelOrder.BottomRight)
{
for (int y = h; y > 0; --y)
{
for (int x = w, e = 0; x >= 0; --x, --e)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
line[x] = px;
}
line.CopyTo(pixels, (y - 1) * w);
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopLeft)
{
for (int i = 0, e = 0; i < pixels.Length; ++i)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
pixels[i] = px;
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopRight)
{
throw new NotImplementedException();
/*
* for (int y = 0; y < h; y++)
* {
* for (int x = w - 1; x >= 0; x--)
* {
* if (e == 0)
* {
* // Read the "packet header"
* p = data[++n];
* // Highest bit of packet header indicates RLE (1) or RAW (0).
* raw = (p & 0x80) != 0x80;
* // Remaining 7 bits indicate RLE packet length.
* e = 1 + (p & 0x7F);
*
* // Read color
* px.Blue = data[++n];
* px.Green = data[++n];
* px.Red = data[++n];
* }
* else if (raw)
* {
* px.Blue = data[++n];
* px.Green = data[++n];
* px.Red = data[++n];
* }
*
* line[x] = px;
* }
* }*/
}
}
else if (header.BitsPerPixel == 32) // Just like above, but with an alpha channel.
{
// Create an array of all the pixels in the bitmap (width x height).
var pixels = new ColorRGB32[w * h];
// ...and assign it to the Bitmap that will eventually be returned.
dc.DecodedBitmap = new BitmapRGB32(w, h, pixels);
ColorRGB32 px = new ColorRGB32();
// Operate on a line-by-line basis; RLE packets will never wrap from one scanline to another.
var line = new ColorRGB32[w];
var len = line.Length;
if (dc.PixelOrder == TGAPixelOrder.BottomLeft)
{
for (int y = h; y > 0; --y)
{
for (int x = 0, e = 0; x < len; ++x, --e)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
px.Alpha = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
px.Alpha = data[++n];
}
line[x] = px;
}
line.CopyTo(pixels, (y - 1) * w);
}
}
else if (dc.PixelOrder == TGAPixelOrder.BottomRight)
{
throw new NotImplementedException();
}
else if (dc.PixelOrder == TGAPixelOrder.TopLeft)
{
throw new NotImplementedException();
}
else if (dc.PixelOrder == TGAPixelOrder.TopRight)
{
throw new NotImplementedException();
}
}
else
{
throw new NotImplementedException();
}
}
dc.Stage = TGADecodeStage.BitmapDecoded;
}
public override void Decode(Frame output)
{
int width = 0, height = 0;
byte depth = 0;
PNGColorType colorType = PNGColorType.TruecolorWithAlpha;
Frame result = output;
// TODO: Verify signature
// Pull the PNG into a data buffer.
if (this.Bitstream == null || this.Bitstream.Length < 1)
{
return;
}
var bytes = new byte[this.Bitstream.Length];
this.Bitstream.Read(bytes, 0, bytes.Length);
var buf = new DataBuffer(bytes, ByteOrder.BigEndian);
var signature = buf.ReadInt64();
if (signature != PNGCodec.BitstreamSignature)
{
}
bool ihdrDone = false;
//bool iendDone = false;
using (var pixelStream = new MemoryStream())
{
var zout = new ZOutputStream(pixelStream);
// Start reading chunks.
while (buf.Available > 0)
{
int length = buf.ReadInt32();
string chunk = string.Concat((char)buf.ReadByte(), (char)buf.ReadByte(), (char)buf.ReadByte(), (char)buf.ReadByte());
switch (chunk)
{
case "IHDR":
if (ihdrDone)
{
throw new NotImplementedException();
}
else
{
ihdrDone = true;
}
if (length != 13)
{
throw new NotImplementedException();
}
width = buf.ReadInt32();
height = buf.ReadInt32();
depth = buf.ReadByte();
colorType = (PNGColorType)buf.ReadByte();
byte xmethod = buf.ReadByte();
PNGFilterMethod filterMethod = (PNGFilterMethod)buf.ReadByte();
byte interlaceMethod = buf.ReadByte();
break;
case "IDAT":
var data = buf.ReadBytes(length);
zout.Write(data, 0, data.Length);
break;
default:
Console.WriteLine("Skipping unknown chunk \"{0}\" in PNG bitstream at offset {1}", chunk, (buf.Position - 8).ToString("X"));
buf.Position += (length > buf.Available) ? buf.Available : length;
break;
}
int crc32 = buf.ReadInt32();
}
if (depth == 8)
{
if (colorType == PNGColorType.TruecolorWithAlpha)
{
//var pd = new byte[width * height * 4];
var pd = new byte[pixelStream.Length];
pixelStream.Position = 0;
pixelStream.Read(pd, 0, pd.Length);
ColorRGB32[] pix = new ColorRGB32[width * height];
ColorRGB32 p = new ColorRGB32();
//File.WriteAllBytes("dump.bin", pd);
for (int i = 0, n = 0; i < pix.Length; i++)
{
if (i % width == 0)
{
n++;
}
p.Red = pd[n++];
p.Green = pd[n++];
p.Blue = pd[n++];
p.Alpha = pd[n++];
pix[i] = p;
}
result.Video[0] = new BitmapRGB32(width, height, pix);
}
else if (colorType == PNGColorType.Truecolor)
{
//var pd = new byte[width * height * 3];
var pd = new byte[pixelStream.Length];
pixelStream.Position = 0;
pixelStream.Read(pd, 0, pd.Length);
ColorRGB24[] pix = new ColorRGB24[width * height];
ColorRGB24 p = new ColorRGB24();
//File.WriteAllBytes("dump.bin", pd);
for (int i = 0, n = 0; i < pix.Length; i++)
{
if (i % width == 0)
{
n++;
}
p.Red = pd[n++];
p.Green = pd[n++];
p.Blue = pd[n++];
pix[i] = p;
}
result.Video[0] = new BitmapRGB24(width, height, pix);
}
else
{
throw new NotImplementedException();
}
}
else
{
throw new NotImplementedException();
}
}
}
public unsafe override void EncodeImage(Image image)
{
this.Open();
this.Bitstream.Seek(TGABitstreamHeader.Length, System.IO.SeekOrigin.Begin);
var tga = image as TGAImage;
if (tga == null)
throw new NotImplementedException();
var header = this.context.Header;
header.Width = (ushort)tga.Width;
header.Height = (ushort)tga.Height;
// Temporarily force RLE off until RLE is implemented properly.
tga.UseRunLengthEncoding = false;
var bitmap = tga.Flatten();
if (bitmap is BitmapRGB24)
{
header.BitsPerPixel = 24;
header.AttributeBits = 0;
header.ImageDescriptor = TGAImageDescriptor.BottomLeft;
var bmp = bitmap as BitmapRGB24;
if (tga.UseRunLengthEncoding)
{
throw new NotImplementedException();
header.ImageType = TGAImageType.RunLengthEncodedTrueColor;
var buffer = new byte[(bmp.Size.Elements * 4)];
var pix = bmp.Pixels;
int n = 0;
var line = new ColorRGB24[tga.Width];
// Operate on each scanline.
for (int s = tga.Height - 1; s >= 0; --s)
{
// Copy pixels from source image into scanline buffer.
Array.Copy(pix, s * tga.Width, line, 0, line.Length);
int idx = 0;
int start = 0;
BeginPacket:
if (idx >= line.Length)
goto EndLine;
else
{
start = idx;
if (line[idx] == line[idx + 1])
goto NextPixelRLE;
}
NextPixelRLE:
if (line[idx] == line[++idx])
idx = 0;
EndLine:
continue;
}
this.Bitstream.Write(buffer, 0, ++n);
}
else
{
header.ImageType = TGAImageType.UncompressedTrueColor;
var buffer = new byte[bmp.Size.Elements * 3];
var pix = bmp.Pixels;
for (int i = 0, n = -1; i < pix.Length; ++i)
{
buffer[++n] = pix[i].Blue;
buffer[++n] = pix[i].Green;
buffer[++n] = pix[i].Red;
}
this.Bitstream.Write(buffer, 0, buffer.Length);
}
}
else if (bitmap is BitmapRGB32)
{
var bmp = bitmap as BitmapRGB32;
if (tga.UseRunLengthEncoding)
throw new NotImplementedException();
else
{
header.ImageType = TGAImageType.UncompressedTrueColor;
var buffer = new byte[bmp.Size.Elements * 4];
var pix = bmp.Pixels;
ColorRGB32 p;
for (int i = 0, n = -1; i < pix.Length; ++i)
{
p = pix[i];
buffer[++n] = p.Blue;
buffer[++n] = p.Green;
buffer[++n] = p.Red;
buffer[++n] = p.Alpha;
}
}
}
else
{
throw new NotImplementedException();
}
this.context.Header = header;
this.Close();
}
public unsafe override void EncodeImage(Image image)
{
this.Open();
this.Bitstream.Seek(TGABitstreamHeader.Length, System.IO.SeekOrigin.Begin);
var tga = image as TGAImage;
if (tga == null)
{
throw new NotImplementedException();
}
var header = this.context.Header;
header.Width = (ushort)tga.Width;
header.Height = (ushort)tga.Height;
// Temporarily force RLE off until RLE is implemented properly.
tga.UseRunLengthEncoding = false;
var bitmap = tga.Flatten();
if (bitmap is BitmapRGB24)
{
header.BitsPerPixel = 24;
header.AttributeBits = 0;
header.ImageDescriptor = TGAImageDescriptor.BottomLeft;
var bmp = bitmap as BitmapRGB24;
if (tga.UseRunLengthEncoding)
{
throw new NotImplementedException();
header.ImageType = TGAImageType.RunLengthEncodedTrueColor;
var buffer = new byte[(bmp.Size.Elements * 4)];
var pix = bmp.Pixels;
int n = 0;
var line = new ColorRGB24[tga.Width];
// Operate on each scanline.
for (int s = tga.Height - 1; s >= 0; --s)
{
// Copy pixels from source image into scanline buffer.
Array.Copy(pix, s * tga.Width, line, 0, line.Length);
int idx = 0;
int start = 0;
BeginPacket:
if (idx >= line.Length)
{
goto EndLine;
}
else
{
start = idx;
if (line[idx] == line[idx + 1])
{
goto NextPixelRLE;
}
}
NextPixelRLE:
if (line[idx] == line[++idx])
{
idx = 0;
}
EndLine:
continue;
}
this.Bitstream.Write(buffer, 0, ++n);
}
else
{
header.ImageType = TGAImageType.UncompressedTrueColor;
var buffer = new byte[bmp.Size.Elements * 3];
var pix = bmp.Pixels;
for (int i = 0, n = -1; i < pix.Length; ++i)
{
buffer[++n] = pix[i].Blue;
buffer[++n] = pix[i].Green;
buffer[++n] = pix[i].Red;
}
this.Bitstream.Write(buffer, 0, buffer.Length);
}
}
else if (bitmap is BitmapRGB32)
{
var bmp = bitmap as BitmapRGB32;
if (tga.UseRunLengthEncoding)
{
throw new NotImplementedException();
}
else
{
header.ImageType = TGAImageType.UncompressedTrueColor;
var buffer = new byte[bmp.Size.Elements * 4];
var pix = bmp.Pixels;
ColorRGB32 p;
for (int i = 0, n = -1; i < pix.Length; ++i)
{
p = pix[i];
buffer[++n] = p.Blue;
buffer[++n] = p.Green;
buffer[++n] = p.Red;
buffer[++n] = p.Alpha;
}
}
}
else
{
throw new NotImplementedException();
}
this.context.Header = header;
this.Close();
}
private void DecodeBitmap()
{
var dc = this.context;
if (dc.Stage < TGADecodeStage.FooterDecoded)
this.DecodeFooter(dc);
var header = dc.Header;
// Syntax sugar
int w = dc.Header.Width;
int h = dc.Header.Height;
if (w < 1 || h < 1)
throw new NotImplementedException();
if (header.BitsPerPixel % 8 != 0)
throw new NotImplementedException("BitsPerPixel not multiple of 8");
// Number of bytes per scanline
int stride = header.Width * (header.BitsPerPixel / 8);
// Read all the bytes that contain pixel data
var data = new byte[dc.PixelDataLength];
this.Bitstream.Seek(dc.PixelDataOffset, SeekOrigin.Begin);
this.Bitstream.Read(data, 0, data.Length);
if (header.ColorMapType == TGAColorMapType.ColorMapped) // Read color map data
throw new NotImplementedException();
else if (header.ImageType == TGAImageType.UncompressedTrueColor)
{
if (header.BitsPerPixel == 16)
throw new NotImplementedException(); // TODO: Implement support for 16-bit TGA decoding.
else if (header.BitsPerPixel == 24)
{
// Create an array of all the pixels in the bitmap (width x height).
var pixels = new ColorRGB24[w * h];
// ...and assign it to the Bitmap that will eventually be returned.
dc.DecodedBitmap = new BitmapRGB24(w, h, pixels);
var n = -1;
if (dc.PixelOrder == TGAPixelOrder.BottomLeft)
{
var line = new ColorRGB24[w];
for (int y = h; y > 0; --y)
{
for (int x = 0; x < line.Length; ++x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
}
line.CopyTo(pixels, (y - 1) * line.Length);
}
}
else if (dc.PixelOrder == TGAPixelOrder.BottomRight)
{
var line = new ColorRGB24[w];
// BTT + Right-to-Left (RTL) pixel order.
for (int y = h; y > 0; --y)
{
// Iterate over the pixels in the scanline from right-to-left.
for (int x = line.Length - 1; x >= 0; --x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
}
line.CopyTo(pixels, (y - 1) * line.Length);
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopLeft)
{
// Top-to-bottom (TTB) + LTR pixel order.
for (int i = 0; i < pixels.Length; i++)
{
// All pixels can be decoded in one pass; TTB + LTR is the way bitmaps are laid out in memory.
pixels[i].Blue = data[++n];
pixels[i].Green = data[++n];
pixels[i].Red = data[++n];
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopRight)
{
var line = new ColorRGB24[w];
for (int y = 0; y < h; ++y)
{
for (int x = line.Length - 1; x >= 0; --x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
}
line.CopyTo(pixels, y * line.Length);
}
}
else
throw new NotImplementedException();
}
else if (header.BitsPerPixel == 32) // Same as above, plus alpha channel.
{
// Create an array of all the pixels in the bitmap (width x height).
var pixels = new ColorRGB32[w * h];
// ...and assign it to the Bitmap that will eventually be returned.
dc.DecodedBitmap = new BitmapRGB32(w, h, pixels);
int n = -1;
var line = new ColorRGB32[w];
// Most common scanline direction first; TGA stores scanlines bottom-to-top by default.
if (dc.PixelOrder == TGAPixelOrder.BottomLeft)
{
// Bottom-to-top (BTT) + Left-to-right (LTR) pixel order.
for (int y = h; y > 0; --y)
{
for (int x = 0; x < line.Length; ++x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
line[x].Alpha = data[++n];
}
line.CopyTo(pixels, (y - 1) * line.Length);
}
}
else if (dc.PixelOrder == TGAPixelOrder.BottomRight)
{
for (int y = h; y > 0; --y)
{
// Iterate over the pixels in the scanline from right-to-left.
for (int x = line.Length - 1; x >= 0; --x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
line[x].Alpha = data[++n];
}
line.CopyTo(pixels, (y - 1) * line.Length);
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopLeft)
{
for (int i = 0; i < pixels.Length; ++i)
{
// All pixels can be decoded in one pass; TTB + LTR is the way bitmaps are laid out in memory.
pixels[i].Blue = data[++n];
pixels[i].Green = data[++n];
pixels[i].Red = data[++n];
pixels[i].Alpha = data[++n];
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopRight)
{
for (int y = 0; y < h; ++y)
{
for (int x = line.Length - 1; x >= 0; --x)
{
line[x].Blue = data[++n];
line[x].Green = data[++n];
line[x].Red = data[++n];
line[x].Alpha = data[++n];
}
line.CopyTo(pixels, y * line.Length);
}
}
}
}
else if (header.ImageType == TGAImageType.RunLengthEncodedTrueColor)
{
int n = -1;
bool raw = false;
byte p;
if (header.BitsPerPixel == 16)
{
throw new NotImplementedException();
}
if (header.BitsPerPixel == 24)
{
// Create an array of all the pixels in the bitmap (width x height).
var pixels = new ColorRGB24[w * h];
// ...and assign it to the Bitmap that will eventually be returned.
dc.DecodedBitmap = new BitmapRGB24(w, h, pixels);
ColorRGB24 px = new ColorRGB24();
// Operate on a line-by-line basis; RLE packets will never wrap from one scanline to another.
var line = new ColorRGB24[w];
// Most common scanline direction first; TGA stores scanlines bottom-to-top by default.
if (dc.PixelOrder == TGAPixelOrder.BottomLeft)
{
for (int y = h; y > 0; --y)
{
for (int x = 0, e = 0; x < line.Length; ++x, --e)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
line[x] = px;
}
line.CopyTo(pixels, (y - 1) * w);
}
}
else if (dc.PixelOrder == TGAPixelOrder.BottomRight)
{
for (int y = h; y > 0; --y)
{
for (int x = w, e = 0; x >= 0; --x, --e)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
line[x] = px;
}
line.CopyTo(pixels, (y - 1) * w);
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopLeft)
{
for (int i = 0, e = 0; i < pixels.Length; ++i)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
pixels[i] = px;
}
}
else if (dc.PixelOrder == TGAPixelOrder.TopRight)
{
throw new NotImplementedException();
/*
for (int y = 0; y < h; y++)
{
for (int x = w - 1; x >= 0; x--)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
}
line[x] = px;
}
}*/
}
}
else if (header.BitsPerPixel == 32) // Just like above, but with an alpha channel.
{
// Create an array of all the pixels in the bitmap (width x height).
var pixels = new ColorRGB32[w * h];
// ...and assign it to the Bitmap that will eventually be returned.
dc.DecodedBitmap = new BitmapRGB32(w, h, pixels);
ColorRGB32 px = new ColorRGB32();
// Operate on a line-by-line basis; RLE packets will never wrap from one scanline to another.
var line = new ColorRGB32[w];
var len = line.Length;
if (dc.PixelOrder == TGAPixelOrder.BottomLeft)
{
for (int y = h; y > 0; --y)
{
for (int x = 0, e = 0; x < len; ++x, --e)
{
if (e == 0)
{
// Read the "packet header"
p = data[++n];
// Highest bit of packet header indicates RLE (1) or RAW (0).
raw = (p & 0x80) != 0x80;
// Remaining 7 bits indicate RLE packet length.
e = 1 + (p & 0x7F);
// Read color
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
px.Alpha = data[++n];
}
else if (raw)
{
px.Blue = data[++n];
px.Green = data[++n];
px.Red = data[++n];
px.Alpha = data[++n];
}
line[x] = px;
}
line.CopyTo(pixels, (y - 1) * w);
}
}
else if (dc.PixelOrder == TGAPixelOrder.BottomRight)
{
throw new NotImplementedException();
}
else if (dc.PixelOrder == TGAPixelOrder.TopLeft)
{
throw new NotImplementedException();
}
else if (dc.PixelOrder == TGAPixelOrder.TopRight)
{
throw new NotImplementedException();
}
}
else
throw new NotImplementedException();
}
dc.Stage = TGADecodeStage.BitmapDecoded;
}