/// <summary>
/// Load Texture From Binary Reader.
/// </summary>
/// <param name="br">The Binary Reader.</param>
/// <returns></returns>
public bool LoadFrom(BinaryReader br)
{
_header = null;
_volumeTexture = null;
_cubeMapTexture = null;
_texture = null;
_lastError = "";
uint id = br.ReadUInt32();
if (id != 0x20534444)
return SetLastError("Invalid DDS Image File.");
_header = new DDSHeader(br);
bool isCompressed = false;
SquishFlags compressFlag = SquishFlags.Dxt1;
if (IsFourCC())
{
isCompressed = true;
switch (_header.PixelFormat.FourCC)
{
case FOURCC_DXT1:
isCompressed = true;
compressFlag = SquishFlags.Dxt1;
break;
case FOURCC_DXT3:
compressFlag = SquishFlags.Dxt3;
break;
case FOURCC_DXT5:
compressFlag = SquishFlags.Dxt5;
break;
case FOURCC_ATI1:
compressFlag = SquishFlags.BC4;
break;
case FOURCC_ATI2:
compressFlag = SquishFlags.BC5;
break;
default:
isCompressed = false;
break;
}
}
uint mipMaps = 1;
if (HasMipMaps())
mipMaps = _header.MipMapCount;
if (IsVolumeTexture())
{
uint ui_slices = _header.Depth;
uint ui_width = _header.Width;
uint ui_height = _header.Height;
_volumeTexture = new VolumeTextureData((int)mipMaps);
for (int i = 0; i < mipMaps; i++)
{
_volumeTexture.Mipmaps[i] = new VolumeTextureMipMap((int)ui_slices);
for (int j = 0; j < ui_slices; j++)
{
int dataSize = (int)(ui_width * ui_height * (_header.PixelFormat.RGBBitCount / 8));
if (isCompressed)
dataSize = SharpSquish.GetStorageRequirements((int)ui_width, (int)ui_height, compressFlag);
byte[] m_slice = br.ReadBytes(dataSize);
_volumeTexture.Mipmaps[i].Slices[j] = new MipmapData()
{
Width = ui_width,
Height = ui_height,
Data = m_slice
};
}
ui_width = Math.Max(ui_width / 2, 1);
ui_height = Math.Max(ui_height / 2, 1);
ui_slices = Math.Max(ui_slices / 2, 1);
}
}
else if (isCubeMapTexture())
{
_cubeMapTexture = new CubeMapTextureData();
bool posX = ((_header.Caps2 & DDSCaps2.DDSCAPS2_CUBEMAP_POSITIVEX) != 0);
bool negX = ((_header.Caps2 & DDSCaps2.DDSCAPS2_CUBEMAP_NEGATIVEX) != 0);
bool posY = ((_header.Caps2 & DDSCaps2.DDSCAPS2_CUBEMAP_POSITIVEY) != 0);
bool negY = ((_header.Caps2 & DDSCaps2.DDSCAPS2_CUBEMAP_NEGATIVEY) != 0);
bool posZ = ((_header.Caps2 & DDSCaps2.DDSCAPS2_CUBEMAP_POSITIVEZ) != 0);
bool negZ = ((_header.Caps2 & DDSCaps2.DDSCAPS2_CUBEMAP_NEGATIVEZ) != 0);
if (posX)
_cubeMapTexture.PositiveX = ReadFace(br, mipMaps, isCompressed, compressFlag);
else
_cubeMapTexture.PositiveX = null;
if (negX)
_cubeMapTexture.NegativeX = ReadFace(br, mipMaps, isCompressed, compressFlag);
else
_cubeMapTexture.NegativeX = null;
if (posY)
_cubeMapTexture.PositiveY = ReadFace(br, mipMaps, isCompressed, compressFlag);
else
_cubeMapTexture.PositiveY = null;
if (negY)
_cubeMapTexture.NegativeY = ReadFace(br, mipMaps, isCompressed, compressFlag);
else
_cubeMapTexture.NegativeY = null;
if (posZ)
_cubeMapTexture.PositiveZ = ReadFace(br, mipMaps, isCompressed, compressFlag);
else
_cubeMapTexture.PositiveZ = null;
if (negZ)
_cubeMapTexture.NegativeZ = ReadFace(br, mipMaps, isCompressed, compressFlag);
else
_cubeMapTexture.NegativeZ = null;
}
else
{
_texture = new MipmapData[(int)mipMaps];
uint ui_width = _header.Width;
uint ui_height = _header.Height;
for (int i = 0; i < mipMaps; i++)
{
int dataSize = (int)(ui_width * ui_height * (_header.PixelFormat.RGBBitCount / 8));
if (isCompressed)
dataSize = SharpSquish.GetStorageRequirements((int)ui_width, (int)ui_height, compressFlag);
byte[] m_slice = br.ReadBytes(dataSize);
_texture[i] = new MipmapData()
{
Width = ui_width,
Height = ui_height,
Data = m_slice
};
ui_width = Math.Max(ui_width / 2, 1);
ui_height = Math.Max(ui_height / 2, 1);
}
}
return true;
}
public void Read(Stream input, OWLib.STUD stud)
{
using (BinaryReader reader = new BinaryReader(input, System.Text.Encoding.Default, true)) {
data = reader.Read <MipmapData>();
}
}
