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# WDL format
This document describes the format of WDL.
## PASS1
WDL file is compressed. We need to decompress it first.
### Header
The file contains a magic number "DDocFB"
And the following two bytes are the version of the format.
And then it follows properties.
Each property has 4 bytes indicate the property name. For example, "font",
"indx".
And each property contains 3 32-bit integer as data.
And then with 50 bytes unknown data.
And read the integer forwardLen which is a 32-bit integer.
Then skip forwardLen - 38 bytes.
### DynaPKCP structure.
- "DynaPKCP": 8 bytes
- unknown integer: 4 bytes
- uncompressedSize: 4 bytes
- compressedSize: 4 bytes
- CRC32 of uncompressed Data: 4 bytes
- data: compressedSize bytes
## PASS2
After decompress all the data in WPass1 and written to a file.
Now we are at Pass2. Pass2 contains the following structures.
### R2
This structure the page separator
- tag: "R2", 2 bytes
- unknown short: 2 bytes
### TC
This structure defines the foreground color
- tag: "TC", 2 bytes
- r: 0~255, 1 byte
- g: 0~255, 1 byte
- b: 0~255, 1 byte
- unknown byte: 1 byte
### BC
This structure defines the background color
- tag: "BC", 2 bytes
- r: 0~255, 1 byte
- g: 0~255, 1 byte
- b: 0~255, 1 byte
- unknown byte: 1 byte
### BH
This structure defines the foreground color. For filling an area or polygon.
- tag: "BH", 2 bytes
- file pointer: points to a Special02 structure.
### FT
This structure defines the Font for ET/EU.
- tag: "FT", 2 bytes
- file pointer: points to a Special01 structure.
### UF
This structure defines the Font for UT
- tag: "UF", 2 bytes
- unknown short: 2 bytes
- file pointer: points to a Special01 structure.
### PN
This structure defines the Stroke.
- tag: "PN", 2 bytes
- file pointer: points to a Special03 structure.
### ET/EU
This structure describes text encoded by local encoding.
- tag: "ET" or "EU", 2 bytes
- seekLen: the length of following data. The following structure will be multiple.
- x: 2 bytes
- y: 2 bytes
- string_length: 2 bytes
- flag1: flag. 1 byte
- string: The string. string_length bytes. It is encoded by either Big5 or GB2312.
- x1: 2 bytes. Only appeared if flag1 & 0x01 != 0
- y1: 2 bytes. Only appeared if flag1 & 0x01 != 0
- x2: 2 bytes. Only appeared if flag1 & 0x01 != 0
- y2: 2 bytes. Only appeared if flag1 & 0x01 != 0
- width_array: string_length shorts (2 bytes). Only appeared if flag1 & 0x02 != 0
### UT
This structure describes text encoded by UTF-16LE.
- tag: "UT", 2 bytes
- seekLen: the length of following data. The following structure will be multiple.
- x: 2 bytes
- y: 2 bytes
- string_length: 2 bytes
- flag1: flag. 1 byte
- string: The string. string_length shorts (2 bytes).
- x1: 2 bytes. Only appeared if flag1 & 0x01 != 0
- y1: 2 bytes. Only appeared if flag1 & 0x01 != 0
- x2: 2 bytes. Only appeared if flag1 & 0x01 != 0
- y2: 2 bytes. Only appeared if flag1 & 0x01 != 0
- width_array: string_length shorts (2 bytes). Only appeared if flag1 & 0x02 != 0
### CR
This structure describes the clip region
- tag: "CR", 2 bytes
- x1: 2 bytes
- y1: 2 bytes
- x2: 2 bytes
- y2: 2 bytes
### FR
This structure describe a filled rectangle
- tag: "FR", 2 bytes
- seekLen: the length of following data. The following structure will be multiple.
- x1: 2 bytes
- y1: 2 bytes
- x2: 2 bytes
- y2: 2 bytes
### PL
This structure describe a Path to draw
- tag: "PL", 2 bytes
- seekLen: the length of following data. The following structure will be multiple.
- N: the number of points, 2 bytes. The following data will repeat N times.
- x: 2 bytes
- y: 2 bytes
### AP
This structure describe a Polygon to draw
- tag: "AP", 2 bytes
- seekLen: the length of following data. The following structure will be multiple.
- N: the number of points, 2 bytes. The following data will repeat N times.
- x: 2 bytes
- y: 2 bytes
### SD
This structure describe a uncompressed picture.
- tag: "SD", 2 bytes
- seekLen: the length of following data.
- target_x: 2 bytes
- target_y: 2 bytes
- target_width: 2 bytes
- target_height: 2 bytes
- unknown_bytes_1: 4 bytes
- width_short: the source image's width, 2 bytes
- height_short: the source image's height, 2 bytes
- unknown_bytes_2: 8 bytes
- width: the source image's width, 4 bytes
- height: the source image's height, 4 bytes
- unknown_short_1: 2 bytes
- color_depth: 2 bytes
- unknown_short_2: 2 bytes
- compressionMethod: 2 bytes
- graphDataLen: the length of graphData. 4 bytes
- unknown_int_1: 4 bytes
- unknown_int_2: 4 bytes
- unknown_int_3: 4 bytes
- unknown_int_4: 4 bytes
- palette_data: 1024 bytes. Only appeared if unknwon_int_3 != 0.
- graphDataLen2: the length of graphData. 4 bytes
- graphData: graphDataLen2 bytes
### SP
This structure describe a compressed picture.
- tag: "SP", 2 bytes
- unknown_short_0: 2 bytes
- seekLen: the length of following data.
- target_x: 2 bytes
- target_y: 2 bytes
- target_width: 2 bytes
- target_height: 2 bytes
- unknown_bytes_1: 4 bytes
- width_short: the source image's width, 2 bytes
- height_short: the source image's height, 2 bytes
- unknown_bytes_2: 10 bytes
- width: the source image's width, 4 bytes
- height: the source image's height, 4 bytes
- unknown_short_1: 2 bytes
- color_depth: 2 bytes
- unknown_short_2: 2 bytes
- compressionMethod: 2 bytes
- graphDataLen: the length of graphData. 4 bytes
- unknown_int_1: 4 bytes
- unknown_int_2: 4 bytes
- unknown_int_3: 4 bytes
- unknown_int_4: 4 bytes
- paletteData: only appeared if compressMethod == 2, 6, or 7.
if color_depth == 1, it has 4*2 bytes.
if color_depth == 8, it has 4*256 bytes.
- graphDataLen2: the length of graphData. 4 bytes.
- graphData: graphDataLen2 bytes.
### BM
Unknown function.
- tag: "BM", 2 bytes
- unknown_short: 2 bytes
### CT
Unknown function.
- tag: "CT", 2 bytes
- unknown_short: 2 bytes
### AQ
Unknown function.
- tag: "AQ", 2 bytes
- seekLen: 2 bytes
- unknownData: seekLen bytes
### RT
Unknown function.
- tag: "RT", 2 bytes
- seekLen: 2 bytes
- unknownData: seekLen bytes
### WP
Unknown function.
- tag: "WP", 2 bytes
- seekLen: 2 bytes
- unknownData: seekLen bytes
### XD
Unknown function.
- tag: "XD", 2 bytes
- seekLen: 2 bytes
- unknownData: seekLen bytes
### SX
Unknown function.
- tag: "SX", 2 bytes
- seekLen: 2 bytes
- unknownData: seekLen bytes
### EP
Unknown function.
- tag: "EP", 2 bytes
- seekLen: 2 bytes
- unknownData: seekLen bytes
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