xref: /aosp_15_r20/external/skia/include/effects/SkDashPathEffect.h (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)

/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkDashPathEffect_DEFINED
#define SkDashPathEffect_DEFINED

#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkTypes.h"

class SkPathEffect;

class SK_API SkDashPathEffect {
public:
    /** intervals: array containing an even number of entries (>=2), with
         the even indices specifying the length of "on" intervals, and the odd
         indices specifying the length of "off" intervals. This array will be
         copied in Make, and can be disposed of freely after.
        count: number of elements in the intervals array
        phase: offset into the intervals array (mod the sum of all of the
         intervals).

        For example: if intervals[] = {10, 20}, count = 2, and phase = 25,
         this will set up a dashed path like so:
         5 pixels off
         10 pixels on
         20 pixels off
         10 pixels on
         20 pixels off
         ...
        A phase of -5, 25, 55, 85, etc. would all result in the same path,
         because the sum of all the intervals is 30.

        Note: only affects stroked paths.
    */
    static sk_sp<SkPathEffect> Make(const SkScalar intervals[], int count, SkScalar phase);
};

#endif