Reference Manual

  • 15.0
  • 07/23/2021
  • Public Content
Contents

Setting Graphics Coordinates

You can set the pixel dimensions of the x- and y-axes with
SETWINDOWCONFIG
. You can access these values through the
wc%numxpixels
and
wc%numypixels
values returned by
GETWINDOWCONFIG
. Similarly,
GETWINDOWCONFIG
also returns the range of colors available in the current mode through the
wc%numcolors
value.
You can also define the graphics area with
SETCLIPRGN
and
SETVIEWPORT
. Both of these functions define a subset of the available window area for graphics output.
SETCLIPRGN
does not change the viewport coordinates, but merely masks part of the screen.
SETVIEWPORT
resets the viewport bounds to the limits you give it and sets the origin to the upper-left corner of this region.
The origin of the viewport-coordinate system can be moved to a new position relative to the physical origin with
SETVIEWORG
. Regardless of the viewport coordinates, however, you can always locate the current graphics output position with
GETCURRENTPOSITION and GETCURRENTPOSITION_W
.
Using the window-coordinate system, you can easily scale any set of data to fit on the screen. You define any range of coordinates (such as 0 to 5000) that works well for your data as the range for the window-coordinate axes. By telling the program that you want the window-coordinate system to fit in a particular area on the screen (map to a particular set of viewport coordinates), you can scale a chart or drawing to any size you want.
SETWINDOW
defines a window-coordinate system bounded by the specified values.
GETPHYSCOORD
converts viewport coordinates to physical coordinates, and
GETVIEWCOORD
translates from physical coordinates to viewport coordinates. Similarly,
GETVIEWCOORD_W
converts window coordinates to viewport coordinates, and
GETWINDOWCOORD
converts viewport coordinates to window coordinates.
For more information:
  • On these routines, see their descriptions in the
    Language Reference
    .

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.