Miscellaneous¶

SBPicture¶

All graphics in the game are stored in the R5G6B5 pixel format (5 bits for red, 6 bits for green and 5 bits for blue).

Two colors are used for transparency in the game:

0x07C0: R5G6B5(0, 62, 0) / R8G8B8(0, 248, 0)
0x001F: R5G6B5(0, 0, 31) / R8G8B8(0, 0, 248)

Specifications¶

struct picture_header
unsigned char pixel_data[picture_header.size_compressed]

PICTURE HEADER¶

+0x00:    WIDTH             [WORD]
+0x02:    HEIGHT            [WORD]
+0x04:    TYPE_COMPRESSION  [DWORD]
+0x08:    SIZE_COMPRESSED   [DWORD]

TYPE_COMPRESSION¶

0x00 : raw
0x01 : zlib compression
0x02 : bz2 compression

Convertion (R5G6B5 to R8G8B8)¶

unsigned short r5g6b5;
unsigned char red8, green8, blue8;

/* ... */

red8 = (r5g6b5 >> 11 << 8) / 32;
green8 = (((r5g6b5 >> 5) & 0x3F) << 8) / 64;
blue8 = ((r5g6b5 & 0x1F) << 8) / 32;