DdsReader

• Namespace: Turian.Engine.Core
• Source File: DdsReader.cs

Reads DirectDraw Surface files into the block data a Vulkan upload wants. Only the block-compressed families the engine can sample are recognised; nothing is decompressed, so a BC3 file costs one header parse and a set of slices over the caller's buffer.

Fields

Magic (uint) = 0x20534444: File magic, the ASCII bytes DDS .

Public Methods

IsDds

public static bool IsDds(ReadOnlySpan<byte> data)

Reports whether data starts with the DDS magic.

Parameters:

• data (ReadOnlySpan): Bytes to sniff; may be shorter than a full header.

Returns: bool

Read

public static DdsImage Read(ReadOnlyMemory<byte> data, bool isSrgb)

Parses data into its format, extent and mip levels.

Parameters:

• data (ReadOnlyMemory): The whole DDS file.
• isSrgb (bool): Whether the data is sampled in sRGB space. Selects the sRGB variant for fourCC formats that have one; BC4 and BC5 store linear data and ignore it, and a DX10 header names its color space explicitly and wins.

Returns: DdsImage

• The parsed image, with one slice per mip level.