lineclip.cpp File Reference

Floating point line clipping for cairo. More...

#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <math.h>
#include <limits>
#include "lineclip.hpp"
#include "error.hpp"

Macros
#define	OP_LINE   0
#define	OP_MOVE   1
#define	OP_NULL   2
#define	AROUND_5(i, j)
#define	AROUND_6(i, j)
#define	AROUND_10(i, j)
#define	AROUND_9(i, j)

Detailed Description

Floating point line clipping for cairo.

Macro Definition Documentation

#define AROUND_10	(		i,
			j
	)

Value:

( (((i)|(j)) == 10) ||                  \
      ((i) ==  8 && (j) ==  6) ||               \
      ((i) ==  6 && (j) ==  8) ||               \
      ((i) ==  9 && (j) ==  2) ||               \
      ((i) ==  2 && (j) ==  9) )

#define AROUND_5	(		i,
			j
	)

Value:

( (((i)|(j)) == 5) ||                   \
      ((i) ==  9 && (j) ==  4) ||               \
      ((i) ==  4 && (j) ==  9) ||               \
      ((i) ==  6 && (j) ==  1) ||               \
      ((i) ==  1 && (j) ==  6) )

#define AROUND_6	(		i,
			j
	)

Value:

( (((i)|(j)) == 6) ||                   \
      ((i) ==  5 && (j) ==  2) ||               \
      ((i) ==  2 && (j) ==  5) ||               \
      ((i) == 10 && (j) ==  4) ||               \
      ((i) ==  4 && (j) == 10) )

#define AROUND_9	(		i,
			j
	)

Value:

( (((i)|(j)) == 9) ||                   \
      ((i) == 10 && (j) ==  1) ||               \
      ((i) ==  1 && (j) == 10) ||               \
      ((i) ==  5 && (j) ==  8) ||               \
      ((i) ==  8 && (j) ==  5) )