canvas.h File Reference

Go to the source code of this file.

Typedefs
typedef struct canvas_s	canvas

Functions
canvas *	canvas_create (int x, int y)
void	canvas_set_point (canvas *c, int x, int y, char character)
int	canvas_get_point (canvas *c, int x, int y)
void	canvas_draw_rect (canvas *c, int x, int y, int width, int height, char ch)
void	canvas_clear (canvas *c)
void	canvas_print (canvas *c)
void	canvas_output (canvas *c, FILE *f)

Typedef Documentation

typedef struct canvas_s canvas

toto lze, 'prazdna' struktura, definovana az v canvas.c, neni treba/vhodne zverejnovat!!!

Definition at line 15 of file canvas.h.

Function Documentation

void canvas_clear

(

canvas *

c

)

vycisti platno

Definition at line 51 of file canvas.c.

                             {
  int i;
  char *end;
//vyplnime mezerami:
  memset(c->canvas, '.', c->height * (c->width+1));//na sirce mame o znak vice
  for(i=0, end=c->canvas; i < c->height; i++) {
    end[c->width]='\0'; end += c->width + 1;
  }
}

canvas* canvas_create	(	int	width,
		int	height
	)

vytvori platno

vytvori platno

Parameters

width	sirka platna
height	vyska platna

Returns

ukazatel na strukturu platna

Definition at line 31 of file canvas.c.

                                             {
  canvas *pcanvas;
  pcanvas = malloc(sizeof *pcanvas);//note: sizeof *pcanvas misto sizeof(canvas)
  pcanvas->width = width;
  pcanvas->height = height;
  pcanvas->canvas = (char*)malloc(width * height + height/*kvuli koncovym '\0'*/);
  canvas_clear(pcanvas);
  return pcanvas;
}

void canvas_draw_rect	(	canvas *	c,
		int	x,
		int	y,
		int	width,
		int	height,
		char	ch
	)

nakresli obdelnik

int canvas_get_point	(	canvas *	c,
		int	x,
		int	y
	)

vrati znak daneho bodu

void canvas_output	(	canvas *	c,
		FILE *	f
	)

vykresli obsah platna do souboru

Definition at line 75 of file canvas.c.

                                       {
}

void canvas_print

(

canvas *

c

)

vykresli obsah platna na standardni vystup

vykresli obsah platna na standardni vystup

Todo:

lze jako makro pomoci canvas_output()

Definition at line 65 of file canvas.c.

                             {
  int i;
  char *line;
  for(i=0, line=c->canvas; i< c->height; i++) {
     printf("%s\n", line);
     line += c->width + 1;
  }
}

void canvas_set_point	(	canvas *	c,
		int	x,
		int	y,
		char	character
	)

nastavi dany bod na zadanou hodnotu