Microsoft DirectDraw Surface (DDS) Writer

Licensing options for this format begin with FME Desktop Professional Edition.

The DDS Writer gives FME the ability to write raster data in the DirectDraw Surface (DDS) format.

Overview

A DDS (Microsoft DirectDraw Surface) file is a raster image saved in the DDS container format. DDS is a Microsoft format for storing data compressed with an S3 Texture Compression (S3TC) algorithm.

DDS files store compressed and uncompressed pixel formats that can be decompressed on the fly by hardware. These files are often used to store textures. DDS files use lossy compression, meaning you will lose detail and color information compared to the original texture. DDS files are represented as three 8-bit bands (RGB) or four 8-bit bands (RGBA).

Writer Overview

FME considers a writer dataset to be a folder name. The DDS writer distinguishes duplicate output files by appending numbers to the filenames.

FME Raster Features

FME raster features represent raster data and use several concepts that are unlike those used in the handling of vector data. The topics below describe how FME processes raster data.

About FME Rasters Tiling and Mosaicking
Raster Properties Band Combining and Separating
Band Properties Band and Palette Selection
Palette Properties Raster Processing
Compression Raster versus Vector Features
Pyramiding Raster File Naming
Interleaving World Files
Interpretation and Data Type TAB Files
Palette Resolution  

DDS supports rasters with Red8, Green8, Blue8 bands, with an optional Alpha8 band.

DDS files can only be created with square pixel dimensions.