ac10a2d039
git-svn-id: http://skia.googlecode.com/svn/trunk@649 2bbb7eff-a529-9590-31e7-b0007b416f81
82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
/*
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Copyright 2010 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef GrClipIterator_DEFINED
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#define GrClipIterator_DEFINED
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#include "GrRect.h"
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class GrClipIterator {
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public:
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GrClipIterator() : fNeedBounds(true) {}
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virtual ~GrClipIterator() {}
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/**
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* Returns true if there are no more rects to process
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*/
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virtual bool isDone() = 0;
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/**
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* Rewind the iterate to replay the set of rects again
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*/
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virtual void rewind() = 0;
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/**
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* Return the current rect. It is an error to call this when done() is true
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*/
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virtual void getRect(GrIRect*) = 0;
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/**
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* Call to move to the next rect in the set
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*/
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virtual void next() = 0;
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/**
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* Set bounds to be the bounds of the clip.
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*/
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virtual void computeBounds(GrIRect* bounds) = 0;
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/**
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* Subclass should call this whenever their underlying bounds has changed.
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*/
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void invalidateBoundsCache() { fNeedBounds = true; }
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const GrIRect& getBounds() {
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if (fNeedBounds) {
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this->computeBounds(&fBounds);
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fNeedBounds = false;
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}
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return fBounds;
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}
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private:
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GrIRect fBounds;
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bool fNeedBounds;
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};
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/**
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* Call to rewind iter, first checking to see if iter is NULL
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*/
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static inline void GrSafeRewind(GrClipIterator* iter) {
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if (iter) {
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iter->rewind();
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}
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}
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#endif
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