Z-World RabbitCore User Manual - page 119
User’s Manual
113
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 scrolling area is
a width of 8 pixels and a height of one row.
PARAMETERS
left
is the top left corner of bitmap, must be evenly divisible by 8.
top
is the top left corner of the bitmap.
cols
is the number of columns in the window, must be evenly divisible by 8.
rows
is the number of rows in the window.
nPix
is the number of pixels to scroll within the defined window (a negative value will produce a scroll
up).
RETURN VALUE
None.
SEE ALSO
glHScroll
Draws bitmap in the specified space. The data for the bitmap are stored in
xmem
. This function calls
glXPutFastmap
automatically if the bitmap is byte-aligned (the left edge and the width are each
evenly divisible by 8).
Any portion of a bitmap image or character that is outside the LCD display area will be clipped.
PARAMETERS
left
is the top left corner of the bitmap.
top
is the top left corner of the bitmap.
width
is the width of the bitmap.
height
is the height of the bitmap.
bitmap
is the address of the bitmap in
xmem
.
RETURN VALUE
None.
SEE ALSO
glXPutFastmap, glPrintf
void glVScroll(int left, int top, int cols,
int rows, int nPix);
void glXPutBitmap(int left, int top, int width,
int height, unsigned long bitmap);