Sketch Section
This section contains the description of a picture. Its actual data is found i n the embedded Paint Data Section.
Offset Size Normal Object
0000 W X size as displayed (form size for normal pics)
0002 W Y size as displayed (form size for normal pics)
0004 W X offset of picture within displayed area
0006 W Y offset of picture within displayed area
0008 W X offset within circumventing area
000A W Y offset within circumventing area
000C W X size of circumventing area (0000 if not applicable)
000E W Y size of circumventing area (0000 if not applicable)
0010 W Always 00 00?
W X magnification
W Y magnification
L Left cut
L Right cut
L Top cut
L Bottom cut
Everything within the first 12 bytes is counted in dots. For normal pictures, only the displayed size and offset is set; for objects, the circumventing (form) size and offset are also set.
The magnification factors determine whether the picture should be compressed or expanded. 03E8 (1000 decimal) is normal size; lower numbers compress, higher numbers expand. So 01F4 would mean halfsize. They just tell how the picture should be displayed, and changing the magnification factor will not change any of the other values. Note that the Sketch program does not read these values; they are only used for sketch objects.
The cuts determine whether a portion of the picture should be hidden, on one of its four sides. Cuts are in fractions of C*Size. So 0000 means do no cut, and 0600 would hide half of a picture 0100 dots large. The displayed size (offset 0 and 2) is taken as a basis for this. Note that the Sketch program does not read these values; they are only used for sketch objects.