/// <summary>
/// Reads the dds file header from the stream.
/// </summary>
/// <param name="stream">The <see cref="Stream"/> containing texture data.</param>
private void ReadFileHeader(Stream stream)
{
Span <byte> magicBuffer = stackalloc byte[4];
stream.Read(magicBuffer, 0, 4);
uint magicValue = BinaryPrimitives.ReadUInt32LittleEndian(magicBuffer);
if (magicValue != DdsFourCc.DdsMagicWord)
{
throw new NotSupportedException("Invalid DDS magic value.");
}
byte[] ddsHeaderBuffer = new byte[DdsConstants.DdsHeaderSize];
stream.Read(ddsHeaderBuffer, 0, DdsConstants.DdsHeaderSize);
this.ddsHeader = DdsHeader.Parse(ddsHeaderBuffer);
this.ddsHeader.Validate();
if (this.ddsHeader.ShouldHaveDxt10Header())
{
byte[] ddsDxt10headerBuffer = new byte[DdsConstants.DdsDxt10HeaderSize];
stream.Read(ddsDxt10headerBuffer, 0, DdsConstants.DdsDxt10HeaderSize);
this.ddsDxt10header = DdsHeaderDxt10.Parse(ddsDxt10headerBuffer);
}
}
/// <summary>
/// Reads the dds file header from the stream.
/// </summary>
/// <param name="stream">The <see cref="Stream"/> containing image data.</param>
private void ReadFileHeader(Stream stream)
{
this.currentStream = stream;
#if NETCOREAPP2_1 || NETCOREAPP3_1
Span <byte> magicBuffer = stackalloc byte[4];
#else
var magicBuffer = new byte[4];
#endif
this.currentStream.Read(magicBuffer, 0, 4);
uint magicValue = BinaryPrimitives.ReadUInt32LittleEndian(magicBuffer);
if (magicValue != DdsFourCC.DdsMagicWord)
{
throw new NotSupportedException($"Invalid DDS magic value.");
}
#if NETCOREAPP2_1 || NETCOREAPP3_1
Span <byte> ddsHeaderBuffer = stackalloc byte[DdsConstants.DdsHeaderSize];
#else
var ddsHeaderBuffer = new byte[DdsConstants.DdsHeaderSize];
#endif
this.currentStream.Read(ddsHeaderBuffer, 0, DdsConstants.DdsHeaderSize);
this.ddsHeader = DdsHeader.Parse(ddsHeaderBuffer);
this.ddsHeader.Validate();
if (this.ddsHeader.ShouldHaveDxt10Header())
{
#if NETCOREAPP2_1 || NETCOREAPP3_1
Span <byte> ddsDxt10headerBuffer = stackalloc byte[DdsConstants.DdsDxt10HeaderSize];
#else
var ddsDxt10headerBuffer = new byte[DdsConstants.DdsDxt10HeaderSize];
#endif
this.currentStream.Read(ddsDxt10headerBuffer, 0, DdsConstants.DdsDxt10HeaderSize);
this.ddsDxt10header = DdsHeaderDxt10.Parse(ddsDxt10headerBuffer);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="DdsProcessor" /> class.
/// </summary>
/// <param name="ddsHeader">The DDS header.</param>
/// <param name="ddsHeaderDxt10">The DDS header DXT10.</param>
public DdsProcessor(DdsHeader ddsHeader, DdsHeaderDxt10 ddsHeaderDxt10)
{
this.DdsHeader = ddsHeader;
this.DdsHeaderDxt10 = ddsHeaderDxt10;
}
