30 lines
851 B
C
30 lines
851 B
C
|
#ifndef SkLineClipper_DEFINED
|
||
|
|
#define SkLineClipper_DEFINED
|
||
|
|
|
||
|
|
#include "SkRect.h"
|
||
|
|
#include "SkPoint.h"
|
||
|
|
|
||
|
|
class SkLineClipper {
|
||
|
|
public:
|
||
|
|
enum {
|
||
|
|
kMaxPoints = 4
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Clip the line pts[0]...pts[1] against clip, ignoring segments that
|
||
|
|
lie completely above or below the clip. For portions to the left or
|
||
|
|
right, turn those into vertical line segments that are aligned to the
|
||
|
|
edge of the clip.
|
||
|
|
|
||
|
|
Return the number of line segments that result, and store the end-points
|
||
|
|
of those segments sequentially in lines as follows:
|
||
|
|
1st segment: lines[0]..lines[1]
|
||
|
|
2nd segment: lines[1]..lines[2]
|
||
|
|
3rd segment: lines[2]..lines[3]
|
||
|
|
*/
|
||
|
|
static int ClipLine(const SkPoint pts[2], const SkRect& clip,
|
||
|
|
SkPoint lines[kMaxPoints]);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|