Difference between revisions of "DDS Image"

// DDS file format

// little endian

4 bytes (char) - magic // "DDS "

// surface format header
4 bytes (uint32) - header size  // "124"
4 bytes - flags      // DDSD_CAPS, DDSD_PIXELFORMAT, DDSD_WIDTH and DDSD_HEIGHT flags are required
4 bytes (uint32) - height in pixels
4 bytes (uint32) - width in pixels
4 bytes (uint32) - pitch or linear size  // calculated from equation
                                               // see notes below for details
                                               // pitch can be "0"
4 bytes (uint32) - depth of the volume  // can be "0"
4 bytes (uint32) - number of mipmaps
44 bytes - reserved

// pixel format structure (32 bytes)
4 bytes (uint32) - structure size
4 bytes - flags
4 bytes (char) - compression type   // "DXT1", "DXT2", "DXT3", "DXT4", or "DXT5"
4 bytes (uint32) - RGB bit count   // 16, 24, or 32
4 bytes (uint32) - R bit mask
4 bytes (uint32) - G bit mask
4 bytes (uint32) - B bit mask
4 bytes (uint32) - A bit mask


// capabilities structure (16 bytes)
4 bytes (uint32) - caps 1
4 bytes (uint32) - caps 2
4 bytes (uint32) - reserved 1
4 bytes (uint32) - reserved 2


4 bytes (uint32) - reserved


x bytes - image data / main surface data


// additional surfaces (optional)
num_of_surfaces *
{
   x bytes - additional surfaces data
}