Begin Image; Begin Image At Current Position - IBM 6400 Programmer's Reference Manual

infinity. This shading uses the current values of pattern symbol, color, mix, and
background mix from the Begin Area order. The printer will not shade regions
with an even number of line crossings from infinity. The printer counts all
coincident boundary lines when counting line crossings.
The current position is the last coordinate value of the preceding drawing order.
The Set Current Position order can move the current position to any drawing
order coordinate within the limits of the GDD defined medium presentation space
window.
Note: When filled areas are drawn such that some boundaries coincide, it is
recommended that they be drawn with the same value for Parameter P1 so that
the area boundary is drawn properly.

Begin Image

D1 0A P1-P10
Description: This order defines an image at the graphics position specified by
parameters P1 to P4. An image consists of a rectangular region defined in
increments of 1/144 in. One or more Image Data orders follow the Begin Image
order. The Image Data orders contain the image data itself. The Begin Image
order introduces a graphics image. Only Image Data, Comment, or No-op orders
are valid between Begin Image and End Image orders.
Parameters P1 and P2 form a two byte value that specifies the X coordinate for
the start of the image. Parameters P3 and P4 form a two byte value that
specifies the Y coordinate for the start of the image. Parameters P1 to P4
define the location of the top left corner of the image. Parameters P5 and P6 are
always zero for this order. Parameters P7 and P8 form a two byte value that
specifies the width of the image in increments of 1/144 in. Parameters P9 and
P10 form a two byte value that specifies the height of the image in increments of
1/144 in.
The printer draws the image in the current values of color and mix.
This order updates the current graphics position to the coordinates of the image
(parameters P1 to P4).
Notes:
1. The Begin Image at Current Position order always specifies the width and
height of the image in increments of 1/144 in., not in drawing units.
2. By sending the image ordered (immediate) instead of unordered (deferred),
the printer uses less storage.

Begin Image at Current Position

91 06 P1-P6
Description: This order defines an image, with the top left corner of the image
at the current graphics position. An image consists of a rectangular region with
a resolution of one pel, defined in increments of 0.18 mm (0.007 in.
Each pel, therefore, represents one dot in the printed image. One or more
Image Data orders follow the Begin Image at Current Position order. The Image
Data orders contain the image data itself. The Begin Image at Current Position
Graphics Command Set
[ 1/144 in. ] ).
Chapter 3. IPDS Commands Reference
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