gs_bm.c File Reference

OGSF library - manipulating bitmaps (lower level functions) More...

#include <grass/gis.h>
#include <grass/glocale.h>
#include <grass/ogsf.h>
#include "gsget.h"

Include dependency graph for gs_bm.c:

Go to the source code of this file.

Macros
#define	MASK_OR   1
	mask types More...
#define	MASK_ORNOT   2
#define	MASK_AND   3
#define	MASK_XOR   4

Functions
struct BM *	gsbm_make_mask (typbuff *frombuff, float maskval, int rows, int cols)
	Do combining of bitmaps, make bitmaps from other data w/maskval. More...
void	gsbm_zero_mask (struct BM *map)
	Zero mask. More...
int	gsbm_or_masks (struct BM *bmvar, struct BM *bmcon)
	Mask bitmap (mask type OR) More...
int	gsbm_ornot_masks (struct BM *bmvar, struct BM *bmcon)
	Mask bitmap (mask type ORNOT) More...
int	gsbm_and_masks (struct BM *bmvar, struct BM *bmcon)
	Mask bitmap (mask type ADD) More...
int	gsbm_xor_masks (struct BM *bmvar, struct BM *bmcon)
	Mask bitmap (mask type XOR) More...
int	gs_update_curmask (geosurf *surf)
	Update current maps. More...
void	print_bm (struct BM *bm)
	Print bitmap to stderr. More...

Detailed Description

OGSF library - manipulating bitmaps (lower level functions)

GRASS OpenGL gsurf OGSF Library

(C) 1999-2008 by the GRASS Development Team

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Author

Bill Brown USACERL, GMSL/University of Illinois (September 1993)

Doxygenized by Martin Landa <landa.martin gmail.com> (May 2008)

Definition in file gs_bm.c.

Macro Definition Documentation

MASK_AND

#define MASK_AND   3

Definition at line 98 of file gs_bm.c.

MASK_OR

#define MASK_OR   1

mask types

Definition at line 96 of file gs_bm.c.

MASK_ORNOT

#define MASK_ORNOT   2

Definition at line 97 of file gs_bm.c.

MASK_XOR

#define MASK_XOR   4

Definition at line 99 of file gs_bm.c.

Function Documentation

gs_update_curmask()

int gs_update_curmask

(

geosurf *

surf

)

Update current maps.

Parameters

surf	surface (geosurf)

Returns

0

1

Definition at line 232 of file gs_bm.c.

References g_surf::att, ATT_COLOR, ATT_MASK, gsurf_att::att_src, ATT_TOPO, typbuff::bm, BM_create(), BM_destroy(), BM_set(), g_surf::cols, gsurf_att::constant, g_surf::curmask, G_debug(), gs_get_att_typbuff(), gs_mapcolor(), gs_mask_defined(), gs_masked(), gs_set_maskmode(), gsbm_make_mask(), gsbm_or_masks(), gsbm_ornot_masks(), gsbm_zero_mask(), g_surf::gsurf_id, MAP_ATT, g_surf::mask_needupdate, typbuff::nm, g_surf::norm_needupdate, NULL, NULL_COLOR, g_surf::nz_color, g_surf::nz_topo, g_surf::rows, g_surf::zmin, and g_surf::zminmasked.

Referenced by gs_calc_normals(), GS_update_curmask(), gsd_wire_arrows(), gsd_wire_surf_const(), and gsd_wire_surf_map().

gsbm_and_masks()

int gsbm_and_masks	(	struct BM *	bmvar,
		struct BM *	bmcon
	)

Mask bitmap (mask type ADD)

Must be same size, ADDs bitmaps & stores in bmvar

Parameters

bmvar	bitmap (BM) to changed
bmcom	bitmap (BM)
mask_type	mask type (see mask types macros)

Returns

-1 on failure (bitmap mispatch)

0 on success

Definition at line 202 of file gs_bm.c.

gsbm_make_mask()

struct BM* gsbm_make_mask	(	typbuff *	frombuff,
		float	maskval,
		int	rows,
		int	cols
	)

Do combining of bitmaps, make bitmaps from other data w/maskval.

Parameters

frombuff	data buffer
maskval	mask type
rows	number of rows
cols	number of cols

Returns

pointer to BM struct

Definition at line 35 of file gs_bm.c.

References typbuff::bm, BM_create(), BM_get(), BM_set(), BM::cols, GET_MAPATT, and BM::rows.

Referenced by gs_update_curmask().

gsbm_or_masks()

int gsbm_or_masks	(	struct BM *	bmvar,
		struct BM *	bmcon
	)

Mask bitmap (mask type OR)

Must be same size, ORs bitmaps & stores in bmvar

Parameters

bmvar	bitmap (BM) to changed
bmcom	bitmap (BM)
mask_type	mask type (see mask types macros)

Returns

-1 on failure (bitmap mispatch)

0 on success

Definition at line 168 of file gs_bm.c.

Referenced by gs_update_curmask().

gsbm_ornot_masks()

int gsbm_ornot_masks	(	struct BM *	bmvar,
		struct BM *	bmcon
	)

Mask bitmap (mask type ORNOT)

Must be same size, ORNOTs bitmaps & stores in bmvar

Parameters

bmvar	bitmap (BM) to changed
bmcom	bitmap (BM)
mask_type	mask type (see mask types macros)

Returns

-1 on failure (bitmap mispatch)

0 on success

Definition at line 185 of file gs_bm.c.

Referenced by gs_update_curmask().

gsbm_xor_masks()

int gsbm_xor_masks	(	struct BM *	bmvar,
		struct BM *	bmcon
	)

Mask bitmap (mask type XOR)

Must be same size, XORs bitmaps & stores in bmvar

Parameters

bmvar	bitmap (BM) to changed
bmcom	bitmap (BM)
mask_type	mask type (see mask types macros)

Returns

-1 on failure (bitmap mispatch)

0 on success

Definition at line 219 of file gs_bm.c.

gsbm_zero_mask()

void gsbm_zero_mask

(

struct BM *

map

)

Zero mask.

Parameters

map	pointer to BM struct

Definition at line 78 of file gs_bm.c.

References BM::bytes, BM::data, and BM::rows.

Referenced by gs_update_curmask().

print_bm()

void print_bm

(

struct BM *

bm

)

Print bitmap to stderr.

Parameters

bm	bitmap (BM)

Definition at line 363 of file gs_bm.c.

References BM_get(), BM::cols, and BM::rows.