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void glSetContrast(unsigned level);
Sets display contrast.
NOTE: This function is not used with the LCD/keypad module since the support circuits
are not available on the LCD/keypad module.
void glFillScreen(int pattern);
Fills the LCD display screen with a pattern.
PARAMETER
The screen will be set to all black if pattern is 0xFF, all white if pattern is 0x00, and vertical stripes
for any other pattern.
RETURN VALUE
None.
SEE ALSO
glBlock, glBlankScreen, glPlotPolygon, glPlotCircle
void glBlankScreen(void);
Blanks the LCD display screen (sets LCD display screen to white).
RETURN VALUE
None.
SEE ALSO
glFillScreen, glBlock, glPlotPolygon, glPlotCircle
void glFillRegion(int left, int top, int width,
int height, char pattern);
Fills a rectangular block in the LCD buffer with the pattern specified. Any portion of the block that is
outside the LCD display area will be clipped..
PARAMETERS
left is the x coordinate of the top left corner of the block.
top is the y coordinate of the top left corner of the block.
width is the width of the block.
height is the height of the block.
pattern is the bit pattern to display (all black if pattern is 0xFF, all white if pattern is 0x00, and
vertical stripes for any other pattern).
RETURN VALUE
None.
SEE ALSO
glFillScreen, glBlankScreen, glBlock, glBlankRegion
User ’s Manual
109
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