Rabbit OP7100 User Manual download pdf (Page 67)

OP7100 Software

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 67

• glXFontInit( struct

fontInfo *pInfo,

char pixWidth, char pixHeight,

unsigned startChar, unsigned endChar,

unsigned long xmemBuffer )

Initializes a font descriptor that has the bitmap defined in xmem. For

bitmaps defined in root memory, use glFontInit.

PARAMETERS: pInfo is a pointer to the font descriptor to be

initialized.

pixWidth is the width of each font item (pixWidth must be uniform

for all items).

pixHeight is the height of each font item (pixHeight must be

uniform for all items).

startChar is the offset to the first useable item (useful for fonts for

ASCII or other fonts with an offset).

endChar is the index of the last useable font item.

xmemBuffer is a pointer to a linear array of the font bitmap. The

bitmap is a column with the major byte aligned.

• void glSetBrushType( int type )

Sets the type of brush type and controls how pixels are drawn on the

screen until the next call to glSetBrushType.

PARAMETER: type is the type of the brush. The four macros

described below have been defined for valid values to pass to the

function.

All four brush types can be used to display text or bitmaps. Do

not use GL

BLOCK for glPlot or glFill graphics primitive

functions.



Macro Description Effect

GL_SET

Pixels specified by subsequent gl

functions will turn on the LCD

pixels

LCDPix =

LCDPix | newPix

GL_CLEAR

Pixels specified by subsequent gl

functions will turn off the LCD

pixels

LCDPix =

LCDPix & ~newPix

GL_XOR

Pixels specified by subsequent gl

functions will toggle the LCD pixels

LCDPix =

LCDPix ^ newPix

GL_BLOCK

Pixels specified by subsequent gl

functions will be displayed on the

LCD as is

LCDPix = newPix

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