gfx_p.h File Reference

Graphics private header. More...

#include <gfx/gfx.h>

Go to the source code of this file.

Defines
#define	BM_PLOT(bm, x, y)   ( *BM_ADDR(bm, x, y) |= BM_MASK(bm, x, y) )
	Plot a pixel in bitmap bm.
#define	BM_CLEAR(bm, x, y)   ( *BM_ADDR(bm, x, y) &= ~BM_MASK(bm, x, y) )
	Clear a pixel in bitmap bm.
#define	BM_DRAWPIXEL(bm, x, y, fg_pen)
	Set a pixel in bitmap bm to the specified color.
#define	BM_READPIXEL(bm, x, y)   ( *BM_ADDR(bm, x, y) & BM_MASK(bm, x, y) ? 1 : 0 )
	Get the value of the pixel in bitmap bm.

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Detailed Description

Graphics private header.

Version:

Id

gfx_p.h 2506 2009-04-15 08:29:07Z duplo

Author:

Bernie Innocenti <bernie@codewiz.org>

Definition in file gfx_p.h.

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Define Documentation

#define BM_CLEAR	(	bm,
		x,
		y		)	( *BM_ADDR(bm, x, y) &= ~BM_MASK(bm, x, y) )

Clear a pixel in bitmap bm.

Note:

bm is evaluated twice.

See also:

BM_PLOT BM_DRAWPIXEL

Definition at line 109 of file gfx_p.h.

#define BM_DRAWPIXEL	(	bm,
		x,
		y,
		fg_pen		)

Value:

do { \
        uint8_t *p = BM_ADDR(bm, x, y); \
        uint8_t mask = BM_MASK(bm, x, y); \
        *p = (*p & ~mask) | ((fg_pen) ? mask : 0); \
    } while (0)

Set a pixel in bitmap bm to the specified color.

Note:

bm is evaluated twice.

This macro is somewhat slower than BM_PLOT and BM_CLEAR.

See also:

BM_PLOT BM_CLEAR

Definition at line 119 of file gfx_p.h.

#define BM_PLOT	(	bm,
		x,
		y		)	( *BM_ADDR(bm, x, y) |= BM_MASK(bm, x, y) )

Plot a pixel in bitmap bm.

Note:

bm is evaluated twice.

See also:

BM_CLEAR BM_DRAWPIXEL

Definition at line 100 of file gfx_p.h.

#define BM_READPIXEL	(	bm,
		x,
		y		)	( *BM_ADDR(bm, x, y) & BM_MASK(bm, x, y) ? 1 : 0 )

Get the value of the pixel in bitmap bm.

Returns:

The returned value is either 0 or 1.

Note:

bm is evaluated twice.

See also:

BM_DRAWPIXEL

Definition at line 134 of file gfx_p.h.