RabbitCore eDisplay OP7200, Руководство пользователя

Страница: 96 / 174

90 eDisplay (OP7200)
Scrolls up or down within the defined window by nPix 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 column parameters will be verified that they are evenly divisible by 8. If not,
they will be changed to be 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 upper left corner of bitmap, must be evenly divisible by 8
top is the left top 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 (negative value to scroll up)
SEE ALSO
glHScroll
Draws bitmap in the specified space. The data for the bitmap are stored in xmem . This function automat-
ically calls glXPutFastmap if the bitmap is byte-aligned (left edge and width are each evenly divis-
ible by 8).
Any portion of a bitmap image or character that is outside the LCD display area will be clipped.
PARAMETERS
left is the upper left corner of bitmap, must be evenly divisible by 8
top is the left top 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
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);