Redguard: Elder Scrolls Adventures

Contents: GRAFs page - All - 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z - Edit

Format Type: Archive
Extensions: gxa
Platforms: unknown
Endian Order: Little Endian

Format Specifications

Still trying to work out the RLE encoding!!! Image or Animation BIG ENDIAN FORMAT (except for a few fields) FILE HEADER uint32 {4} - Header (BMHD) uint32 {4} - Color Palette Offset (34) (relative to the end of this field) byte {32} - Description (GXlib image conversion ) uint16 {2} - Number of Animation Frames (LITTLE ENDIAN) COLOR PALETTE (256 Colors) uint32 {4} - Header (BPAL) uint32 {4} - Color Palette Length (768) for each color byte {1} - Red byte {1} - Green byte {1} - Blue IMAGE DATA uint32 {4} - Header (BBMP) uint32 {4} - Pixel Data Length (relative to the end of this field) for each animation frame... uint16 {2} - Unknown (256) uint16 {2} - Image Width (LITTLE ENDIAN) uint16 {2} - Image Height (LITTLE ENDIAN) uint32 {4} - null uint32 {4} - RLE Encoding? (0=no encoding, 1=encoding) uint32 {4} - null NO ENCODING for each pixel byte {1} - Palette Index RLE ENCODING uint32 {4} - Length of Encoded Data (LITTLE) THE BELOW IS NOT RIGHT, AND NOT COMPLETE. Note: the first 16 palette indexes are junk data, so maybe 4 bits are used as the indicator field? eg bit 1 might mean "repeat the next X pixels", bit 2 might mean "no repeat", bit 3 might mean "go back and copy X pixels" etc. for each row of the image Read 2 bytes if (byte[2] == 0 && byte[1]&128 == 1) { byte[1]&127 = Number of Repeats Read 1 byte - this is the pixel to repeat now continue reading bytes, which are real pixels, until you reach the next null byte {1} - null end of block terminator } else { byte[1] is a real pixel go back to the start, using byte[2] as the first of the 2 bytes you read } FILE FOOTER uint32 {4} - Header (END )