The Tor Browser: gfx/skia/trunk/src/core/SkEdgeClipper.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     2 /*

     3  * Copyright 2009 The Android Open Source Project

     4  *

     5  * Use of this source code is governed by a BSD-style license that can be

     6  * found in the LICENSE file.

     7  */

    10 #ifndef SkEdgeClipper_DEFINED

    11 #define SkEdgeClipper_DEFINED

    13 #include "SkPath.h"

    15 /** This is basically an iterator. It is initialized with an edge and a clip,

    16     and then next() is called until it returns kDone_Verb.

    17  */

    18 class SkEdgeClipper {

    19 public:

    20     bool clipQuad(const SkPoint pts[3], const SkRect& clip);

    21     bool clipCubic(const SkPoint pts[4], const SkRect& clip);

    23     SkPath::Verb next(SkPoint pts[]);

    25 private:

    26     SkPoint*        fCurrPoint;

    27     SkPath::Verb*   fCurrVerb;

    29     enum {

    30         kMaxVerbs = 13,

    31         kMaxPoints = 32

    32     };

    33     SkPoint         fPoints[kMaxPoints];

    34     SkPath::Verb    fVerbs[kMaxVerbs];

    36     void clipMonoQuad(const SkPoint srcPts[3], const SkRect& clip);

    37     void clipMonoCubic(const SkPoint srcPts[4], const SkRect& clip);

    38     void appendVLine(SkScalar x, SkScalar y0, SkScalar y1, bool reverse);

    39     void appendQuad(const SkPoint pts[3], bool reverse);

    40     void appendCubic(const SkPoint pts[4], bool reverse);

    41 };

    43 #ifdef SK_DEBUG

    44     void sk_assert_monotonic_x(const SkPoint pts[], int count);

    45     void sk_assert_monotonic_y(const SkPoint pts[], int count);

    46 #else

    47     #define sk_assert_monotonic_x(pts, count)

    48     #define sk_assert_monotonic_y(pts, count)

    49 #endif

    51 #endif

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