Maven module :un.storage : image-sgi :
Class : un.storage.imagery.sgi.SGIConstants
Extends/Implements : -
Subclasses : -

author Johann Sorel

Variables : SIGNATURE, BSIGNATURE, STORAGE_VERBATIM, STORAGE_RLE, COLORMAP_NORMAL, COLORMAP_DITHERED, COLORMAP_SCREEN, COLORMAP_COLORMAP
Functions : -

2byte file header magic.

public short SIGNATURE

public byte[] BSIGNATURE

No compression.

public byte STORAGE_VERBATIM

RLE compression.

public byte STORAGE_RLE

0: NORMAL
The data in the channels represent B/W values for images
with 1 channel, RGB values for images with 3 channels, and RGBA
values for images with 4 channels. Almost all the SGI image files are of this type.

public int COLORMAP_NORMAL

1: DITHERED
The image will have only 1 channel of data. For each pixel, RGB data
is packed into one 8 bit value. 3 bits are used for red and green, while
blue uses 2 bits. Red data is found in bits[2..0], green data in bits[5..3],
and blue data in bits[7..6]. This format is obsolete.

public int COLORMAP_DITHERED

2: SCREEN
The image will have only 1 channel of data. This format was used to
store color-indexed pixels. To convert the pixel values into RGB values a
colormap must be used. The appropriate color map varies from image to image.
This format is obsolete.

public int COLORMAP_SCREEN

3: COLORMAP
The image is used to store a color map from an SGI machine. In this
case the image is not displayable in the conventional sense.

public int COLORMAP_COLORMAP