Rabbit RabbitCore RCM3209 User Manual page 123

void glVScroll(int left, int top, int cols, int rows, int nPix);
DESCRIPTION
Scrolls up or down, within the defined window by x number of pixels. The opposite
edge of the scrolled window will be filled in with white pixels. The window must be
byte-aligned.
Parameters will be verified for the following:
1. The left and cols parameters will be verified that they are evenly divisible by 8. If not,
they will be truncated to a value that is a multiple of 8.
2. Parameters will be checked to verify that the scrolling area is valid. The minimum scroll-
ing area is a width of 8 pixels and a height of one row.
PARAMETERS
left
top
cols
rows
nPix
RETURN VALUE
None.
SEE ALSO
glHScroll
User's Manual
glVScroll
the top left corner of bitmap, must be evenly divisible by 8.
the top left corner of the bitmap.
the number of columns in the window, must be evenly divisible by 8.
the number of rows in the window.
the number of pixels to scroll within the defined window (a negative
value will produce a scroll up).
117