L Size of Paint Data Section (including this long)

L Offset within Paint Data Section of pixel data. Always 28 00 00 00 ?

L X Size of picture in dots

L Y Size of picture in dots

Length X Size of the picture in twips. 00 00 00 00 means unspecified.

Length Y Size of the picture in twips. 00 00 00 00 means unspecified.

L Number of bits in a dot. Usually 02 00 00 00

L 00 00 00 00 for greyscale pictures, 01 00 00 00 for colour (?)

L Always 00 00 00 00 ?

L Encoding (see table below)

L (CA) Always FF FF FF FF ?

L (CA) Always 44 00 00 00 ?

Pixel data

The two longs marked (CA) are only found in a Clip Art File. Their use is unknown. They are not included in the size of the section (first long) and the offset of the pixel data (second long): you should add 8 to both of them.

There are several ways an image may be encoded:

Vlaue Description

00 00 00 00 Plain data

01 00 00 00 8-bit RLE encoding

02 00 00 00 12-bit RLE encoding

03 00 00 00 16-bit RLE encoding

04 00 00 00 24-bit RLE encoding

Though all lines have the same length, this length can be a little larger than the picture X size. The remaining padding should be discarded. The length of a line is always a whole number of longs (after RLE decoding).

8-bit RLE encoding consists of sequences of marker bytes with data bytes. A marker byte of 00 to 7F means that the next byte should be repeated that many times and once more. A marker byte of 80 to FF means that (100-marker) bytes of data follow.

12-bit RLE encoding consists of words. The 4 most significant bits hold the number of repetitions minus 1 of the 12 least significant bits.

16-bit RLE and 24-bit RLE are similar to 8-bit RLE. A marker byte of 00 to 7F means that the next pixel (2 resp. 3 bytes) should be repeated that many times and once more. A marker byte of 80 to FF means that (100-marker) pixels (2 resp. 3 bytes each) of data follow.

After RLE decoding (or right at the start if this was plain data), you are left with a series of bytes. Depending on the number of bits per pixel, you can get any number of colours. Least significant bits are leftmost pixels, and for colour pictures, blue is usually least significant, green is in the middle, and red is most significant.

If the number of bits per pixel equals 2, each byte encodes four pixels. A pixel is two bits wide, and can range from black to invisible:

Value Color

0 Black

1 Dark grey

2 Light grey

3 Invisible

If the number of bits per pixel equals 4, a palette is used for colour images as follows:

Value RGB Color

0 00 00 00 Black

1 55 55 55 Dark grey

2 80 00 00 Dark red

3 80 80 00 Dark yellow

4 00 80 00 Dark green

5 FF 00 00 Red

6 00 FF 00 Green

7 FF FF 00 Yellow

8 FF 00 FF Magenta

9 00 FF 00 Blue

A 00 FF FF Cyan

B 80 00 80 Dark magenta

C 00 00 80 Dark blue

D 00 80 80 Dark magenta

E AA AA AA Light grey

F FF FF FF Whitew

A 8-bit colour palette as below has been found:

Value RGB

00 00 00 00

01 33 00 00

02 66 00 00

03 99 00 00

04 CC 00 00

05 FF 00 00

06 00 33 00

07 33 33 00

08 66 33 00

09 99 33 00

0A CC 33 00

0B FF 33 00

0C 00 66 00

0D 33 66 00

0E 66 66 00

0F 99 66 00

10 CC 66 00

11 FF 66 00

12 00 99 00

13 33 99 00

14 66 99 00

15 99 99 00

16 CC 99 00

17 FF 99 00

18 00 CC 00

19 33 CC 00

1A 66 CC 00

1B 99 CC 00

1C CC CC 00

1D FF CC 00

1E 00 FF 00

1F 33 FF 00

20 66 FF 00

21 99 FF 00

22 CC FF 00

23 FF FF 00

24 00 00 33

25 33 00 33

26 66 00 33

27 99 00 33

28 CC 00 33

29 FF 00 33

2A 00 33 33

2B 33 33 33

2C 66 33 33

2D 99 33 33

2E CC 33 33

2F FF 33 33

30 00 66 33

31 33 66 33

32 66 66 33

33 99 66 33

34 CC 66 33

35 FF 66 33

36 00 99 33

37 33 99 33

38 66 99 33

39 99 99 33

3A CC 99 33

3B FF 99 33

3C 00 CC 33

3D 33 CC 33

3E 66 CC 33

3F 99 CC 33

40 CC CC 33

41 FF CC 33

42 00 FF 33

43 33 FF 33

44 66 FF 33

45 99 FF 33

46 CC FF 33

47 FF FF 33

48 00 00 66

49 33 00 66

4A 66 00 66

4B 99 00 66

4C CC 00 66

4D FF 00 66

4E 00 33 66

4F 33 33 66

50 66 33 66

51 99 33 66

52 CC 33 66

53 FF 33 66

54 00 66 66

55 33 66 66

56 66 66 66

57 99 66 66

58 CC 66 66

59 FF 66 66

5A 00 99 66

5B 33 99 66

5C 66 99 66

5D 99 99 66

5E CC 99 66

5F FF 99 66

60 00 CC 66

61 33 CC 66

62 66 CC 66

63 99 CC 66

64 CC CC 66

65 FF CC 66

66 00 FF 66

67 33 FF 66

68 66 FF 66

69 99 FF 66

6A CC FF 66

6B FF FF 66

6C 11 11 11

6D 22 22 22

6E 44 44 44

6F 55 55 55

70 77 77 77

71 11 00 00

72 22 00 00

73 44 00 00

74 55 00 00

75 77 00 00

76 00 11 00

77 00 22 00

78 00 44 00

79 00 55 00

7A 00 77 00

7B 00 00 11

7C 00 00 22

7D 00 00 44

7E 00 00 55

7F 00 00 77

80 00 00 88

81 00 00 AA

82 00 00 BB

83 00 00 DD

84 00 00 EE

85 00 88 00

86 00 AA 00

87 00 BB 00

88 00 DD 00

89 00 EE 00

8A 88 00 00

8B AA 00 00

8C BB 00 00

8D DD 00 00

8E EE 00 00

8F 88 88 88

90 AA AA AA

91 BB BB BB

92 DD DD DD

93 EE EE EE

94 00 00 99

95 33 00 99

96 66 00 99

97 99 00 99

98 CC 00 99

99 FF 00 99

9A 00 33 99

9B 33 33 99

9C 66 33 99

9D 99 33 99

9E CC 33 99

9F FF 33 99

A0 00 66 99

A1 33 66 99

A2 66 66 99

A3 99 66 99

A4 CC 66 99

A5 FF 66 99

A6 00 99 99

A7 33 99 99

A8 66 99 99

A9 99 99 99

AA CC 99 99

AB FF 99 99

AC 00 CC 99

AD 33 CC 99

AE 66 CC 99

AF 99 CC 99

B0 CC CC 99

B1 FF CC 99

B2 00 FF 99

B3 33 FF 99

B4 66 FF 99

B5 99 FF 99

B6 CC FF 99

B7 FF FF 99

B8 00 00 CC

B9 33 00 CC

BA 66 00 CC

BB 99 00 CC

BC CC 00 CC

BD FF 00 CC

BE 00 33 CC

BF 33 33 CC

C0 66 33 CC

C1 99 33 CC

C2 CC 33 CC

C3 FF 33 CC

C4 00 66 CC

C5 33 66 CC

C6 66 66 CC

C7 99 66 CC

C8 CC 66 CC

C9 FF 66 CC

CA 00 99 CC

CB 33 99 CC

CC 66 99 CC

CD 99 99 CC

CE CC 99 CC

CF FF 99 CC

D0 00 CC CC

D1 33 CC CC

D2 66 CC CC

D3 99 CC CC

D4 CC CC CC

D5 FF CC CC

D6 00 FF CC

D7 33 FF CC

D8 66 FF CC

D9 99 FF CC

DA CC FF CC

DB FF FF CC

DC 00 00 FF

DD 33 00 FF

DE 66 00 FF

DF 99 00 FF

E0 CC 00 FF

E1 FF 00 FF

E2 00 33 FF

E3 33 33 FF

E4 66 33 FF

E5 99 33 FF

E6 CC 33 FF

E7 FF 33 FF

E8 00 66 FF

E9 33 66 FF

EA 66 66 FF

EB 99 66 FF

EC CC 66 FF

ED FF 66 FF

EE 00 99 FF

EF 33 99 FF

F0 66 99 FF

F1 99 99 FF

F2 CC 99 FF

F3 FF 99 FF

F4 00 CC FF

F5 33 CC FF

F6 66 CC FF

F7 99 CC FF

F8 CC CC FF

F9 FF CC FF

FA 00 FF FF

FB 33 FF FF

FC 66 FF FF

FD 99 FF FF

FE CC FF FF

FF FF FF FF