Z-World eDisplay OP7200, User Manual

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User’s Manual 63
4.4.6.2 Graphic Drawing Routines
The
GRAPHIC.LIB
library in the
DISPLAYS\GRAPHIC
directory provides function calls
for primitive graphic drawing routines such as lines, circles, and polygons.
Initializes the display devices, clears the screen. This function call must be made prior to any other
graphic function calls.
SEE ALSO
glDispOnOFF, glBacklight, glSetContrast, glPlotDot, glBlock, glPlotPolygon,
glPlotCircle, glHScroll, glVScroll, glXFontInit, glPrintf, glPutChar,
glSetBrushType, glBuffLock, glBuffUnlock, glPlotLine
Increments LCD screen-locking counter. Graphics calls are recorded in the LCD memory buffer, and are
not transferred to the LCD if the counter is non-zero.
NOTE: Functions
glBuffLock()
and
glBuffUnlock()
can be nested up to a level
of 255, but be sure to balance the calls. It is not a requirement to use these procedures,
but a set of
glBuffLock()
and
glBuffUnlock()
bracketing a set of related
graphics calls significantly speeds up the rendering.
SEE ALSO
glBuffUnlock, glSwap
Decrements LCD screen-locking counter. The contents of the LCD buffer are transferred to the LCD if
the counter goes to zero.
SEE ALSO
glBuffLock, glSwap
Checks the LCD screen-locking counter. The contents of the LCD buffer are transferred to the LCD if the
counter is zero.
SEE ALSO
glBuffLock, glBuffUnlock
void glInit(void);
void glBuffLock(void);
void glBuffUnlock(void);
void glSwap(void);