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EN Raster Graphics 6-13
Source Raster Height Command
The Raster Height command specifies the height in raster rows of the
raster area. Height is the direction perpendicular to the direction that
raster rows are laid down, hence, height is subject to the current
raster presentation mode and print direction (see Figure 6-5).
? * r # T
* Greater values default to (logical page length - current Y cursor position).
Note Specifying the raster width and raster height improves memory
usage. Therefore it is highly recommended.
This command fills the raster area to the full raster height with zeroed
rows. Unspecified rows map to either white or transparent depending
on the source transparency mode (this is true only if index 0 is white).
When a Transfer Raster Data command is received that causes any
raster row to extend beyond the row boundary set by the Raster
Height command, the row outside the boundary is clipped. This
includes the case where the cursor is moved beyond the height
boundary with a Raster Y Offset command and the printing of raster
data is attempted.
If you have specified either a raster height or a raster width of 0 and a
Start Raster Graphics (or Transfer Raster Data) command is
received, then the entire raster graphic is clipped. If both a raster
height and a raster width are specified (non-zero) and a Start Raster
Graphics (or Transfer Raster Data) command is received, then the
raster area is guaranteed to be filled.
Note For color printers, a zero fill is not necessarily white.
If the raster height is not set, no padding or clipping of rows takes
place.
# = Height in raster rows
Default =N/A
Range = 0 to (logical page length – current Y- position of the 0,
cursor)*