diff options
Diffstat (limited to 'include/core/SkClipStack.h')
| -rw-r--r-- | include/core/SkClipStack.h | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/include/core/SkClipStack.h b/include/core/SkClipStack.h index fbdcb36c84..71b68cebde 100644 --- a/include/core/SkClipStack.h +++ b/include/core/SkClipStack.h @@ -14,6 +14,12 @@ struct SkRect; class SkPath; +// Because a single save/restore state can have multiple clips, this class +// stores the stack depth (fSaveCount) and clips (fDeque) separately. +// Each clip in fDeque stores the stack state to which it belongs +// (i.e., the fSaveCount in force when it was added). Restores are thus +// implemented by removing clips from fDeque that have an fSaveCount larger +// then the freshly decremented count. class SK_API SkClipStack { public: SkClipStack(); @@ -44,12 +50,15 @@ public: /** * getBounds places the current finite bound in its first parameter. In its * second, it indicates which kind of bound is being returned. If - * 'finiteBound' is a normal bounding box then it encloses are writeable + * 'finiteBound' is a normal bounding box then it encloses all writeable * pixels. If 'finiteBound' is an inside out bounding box then it * encloses all the un-writeable pixels and the true/normal bound is the - * infinite plane. + * infinite plane. isIntersectionOfRects is an optional parameter + * that is true if 'finiteBound' resulted from an intersection of rects. */ - void getBounds(SkRect* finiteBound, BoundsType* boundType) const; + void getBounds(SkRect* finiteBound, + BoundsType* boundType, + bool* isIntersectionOfRects = NULL) const; void clipDevRect(const SkIRect& ir, SkRegion::Op op) { SkRect r; @@ -165,12 +174,15 @@ public: * drawing areas (i.e., those resulting from a saveLayer). For finite bounds, * the translation (+offsetX, +offsetY) is applied before the clamp to the * maximum rectangle: [0,maxWidth) x [0,maxHeight). + * isIntersectionOfRects is an optional parameter that is true when + * 'bounds' is the result of an intersection of rects. */ void getConservativeBounds(int offsetX, int offsetY, int maxWidth, int maxHeight, - SkRect* bounds) const; + SkRect* bounds, + bool* isIntersectionOfRects = NULL) const; private: friend class Iter; |