/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkLatticeIter_DEFINED
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#define SkLatticeIter_DEFINED
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#include "SkCanvas.h"
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#include "SkScalar.h"
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#include "SkTArray.h"
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struct SkIRect;
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struct SkRect;
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/**
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* Disect a lattice request into an sequence of src-rect / dst-rect pairs
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*/
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class SK_API SkLatticeIter {
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public:
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static bool Valid(int imageWidth, int imageHeight, const SkCanvas::Lattice& lattice);
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SkLatticeIter(const SkCanvas::Lattice& lattice, const SkRect& dst);
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static bool Valid(int imageWidth, int imageHeight, const SkIRect& center);
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SkLatticeIter(int imageWidth, int imageHeight, const SkIRect& center, const SkRect& dst);
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/**
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* While it returns true, use src/dst to draw the image/bitmap. Optional parameters
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* isFixedColor and fixedColor specify if the rectangle is filled with a fixed color.
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* If (*isFixedColor) is true, then (*fixedColor) contains the rectangle color.
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*/
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bool next(SkIRect* src, SkRect* dst, bool* isFixedColor = nullptr,
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SkColor* fixedColor = nullptr);
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/** Version of above that converts the integer src rect to a scalar rect. */
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bool next(SkRect* src, SkRect* dst, bool* isFixedColor = nullptr,
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SkColor* fixedColor = nullptr) {
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SkIRect isrcR;
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if (this->next(&isrcR, dst, isFixedColor, fixedColor)) {
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*src = SkRect::Make(isrcR);
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return true;
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}
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return false;
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}
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/**
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* Apply a matrix to the dst points.
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*/
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void mapDstScaleTranslate(const SkMatrix& matrix);
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/**
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* Returns the number of rects that will actually be drawn.
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*/
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int numRectsToDraw() const {
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return fNumRectsToDraw;
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}
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private:
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SkTArray<int> fSrcX;
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SkTArray<int> fSrcY;
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SkTArray<SkScalar> fDstX;
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SkTArray<SkScalar> fDstY;
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SkTArray<SkCanvas::Lattice::RectType> fRectTypes;
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SkTArray<SkColor> fColors;
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int fCurrX;
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int fCurrY;
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int fNumRectsInLattice;
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int fNumRectsToDraw;
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};
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#endif
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