public static unsafe libsecondlife.Image LoadTGAImage(System.IO.Stream source, bool mask)
{
byte[] buffer = new byte[source.Length];
source.Read(buffer, 0, buffer.Length);
System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer);
System.IO.BinaryReader br = new System.IO.BinaryReader(ms);
tgaHeader header = new tgaHeader();
header.Read(br);
if (header.ImageSpec.PixelDepth != 8 &&
header.ImageSpec.PixelDepth != 16 &&
header.ImageSpec.PixelDepth != 24 &&
header.ImageSpec.PixelDepth != 32)
throw new ArgumentException("Not a supported tga file.");
if (header.ImageSpec.AlphaBits > 8)
throw new ArgumentException("Not a supported tga file.");
if (header.ImageSpec.Width > 4096 ||
header.ImageSpec.Height > 4096)
throw new ArgumentException("Image too large.");
byte[] decoded = new byte[header.ImageSpec.Width * header.ImageSpec.Height * 4];
System.Drawing.Imaging.BitmapData bd = new System.Drawing.Imaging.BitmapData();
fixed (byte* pdecoded = &decoded[0])
{
bd.Width = header.ImageSpec.Width;
bd.Height = header.ImageSpec.Height;
bd.PixelFormat = System.Drawing.Imaging.PixelFormat.Format32bppPArgb;
bd.Stride = header.ImageSpec.Width * 4;
bd.Scan0 = (IntPtr)pdecoded;
switch (header.ImageSpec.PixelDepth)
{
case 8:
decodeStandard8(bd, header, br);
break;
case 16:
if (header.ImageSpec.AlphaBits > 0)
decodeSpecial16(bd, header, br);
else
decodeStandard16(bd, header, br);
break;
case 24:
if (header.ImageSpec.AlphaBits > 0)
decodeSpecial24(bd, header, br);
else
decodeStandard24(bd, header, br);
break;
case 32:
decodeStandard32(bd, header, br);
break;
default:
return null;
}
}
int n = header.ImageSpec.Width * header.ImageSpec.Height;
libsecondlife.Image image;
if (mask && header.ImageSpec.AlphaBits == 0 && header.ImageSpec.PixelDepth == 8)
{
image = new libsecondlife.Image(header.ImageSpec.Width, header.ImageSpec.Height, libsecondlife.ImageChannels.Alpha);
int p = 3;
for (int i = 0; i < n; i++)
{
image.Alpha[i] = decoded[p];
p += 4;
}
}
else
{
image = new libsecondlife.Image(header.ImageSpec.Width, header.ImageSpec.Height, libsecondlife.ImageChannels.Color | libsecondlife.ImageChannels.Alpha);
int p = 0;
for (int i = 0; i < n; i++)
{
image.Blue[i] = decoded[p++];
image.Green[i] = decoded[p++];
image.Red[i] = decoded[p++];
image.Alpha[i] = decoded[p++];
}
}
br.Close();
return image;
}
public static unsafe libsecondlife.Image LoadTGAImage(System.IO.Stream source, bool mask)
{
byte[] buffer = new byte[source.Length];
source.Read(buffer, 0, buffer.Length);
System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer);
System.IO.BinaryReader br = new System.IO.BinaryReader(ms);
tgaHeader header = new tgaHeader();
header.Read(br);
if (header.ImageSpec.PixelDepth != 8 &&
header.ImageSpec.PixelDepth != 16 &&
header.ImageSpec.PixelDepth != 24 &&
header.ImageSpec.PixelDepth != 32)
{
throw new ArgumentException("Not a supported tga file.");
}
if (header.ImageSpec.AlphaBits > 8)
{
throw new ArgumentException("Not a supported tga file.");
}
if (header.ImageSpec.Width > 4096 ||
header.ImageSpec.Height > 4096)
{
throw new ArgumentException("Image too large.");
}
byte[] decoded = new byte[header.ImageSpec.Width * header.ImageSpec.Height * 4];
System.Drawing.Imaging.BitmapData bd = new System.Drawing.Imaging.BitmapData();
fixed(byte *pdecoded = &decoded[0])
{
bd.Width = header.ImageSpec.Width;
bd.Height = header.ImageSpec.Height;
bd.PixelFormat = System.Drawing.Imaging.PixelFormat.Format32bppPArgb;
bd.Stride = header.ImageSpec.Width * 4;
bd.Scan0 = (IntPtr)pdecoded;
switch (header.ImageSpec.PixelDepth)
{
case 8:
decodeStandard8(bd, header, br);
break;
case 16:
if (header.ImageSpec.AlphaBits > 0)
{
decodeSpecial16(bd, header, br);
}
else
{
decodeStandard16(bd, header, br);
}
break;
case 24:
if (header.ImageSpec.AlphaBits > 0)
{
decodeSpecial24(bd, header, br);
}
else
{
decodeStandard24(bd, header, br);
}
break;
case 32:
decodeStandard32(bd, header, br);
break;
default:
return(null);
}
}
int n = header.ImageSpec.Width * header.ImageSpec.Height;
libsecondlife.Image image;
if (mask && header.ImageSpec.AlphaBits == 0 && header.ImageSpec.PixelDepth == 8)
{
image = new libsecondlife.Image(header.ImageSpec.Width, header.ImageSpec.Height, libsecondlife.ImageChannels.Alpha);
int p = 3;
for (int i = 0; i < n; i++)
{
image.Alpha[i] = decoded[p];
p += 4;
}
}
else
{
image = new libsecondlife.Image(header.ImageSpec.Width, header.ImageSpec.Height, libsecondlife.ImageChannels.Color | libsecondlife.ImageChannels.Alpha);
int p = 0;
for (int i = 0; i < n; i++)
{
image.Blue[i] = decoded[p++];
image.Green[i] = decoded[p++];
image.Red[i] = decoded[p++];
image.Alpha[i] = decoded[p++];
}
}
br.Close();
return(image);
}
