1 /* 2 * Copyright 2015 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkLatticeIter_DEFINED 9 #define SkLatticeIter_DEFINED 10 11 #include "SkCanvas.h" 12 #include "SkScalar.h" 13 #include "SkTArray.h" 14 15 struct SkIRect; 16 struct SkRect; 17 18 /** 19 * Disect a lattice request into an sequence of src-rect / dst-rect pairs 20 */ 21 class SK_API SkLatticeIter { 22 public: 23 24 static bool Valid(int imageWidth, int imageHeight, const SkCanvas::Lattice& lattice); 25 26 SkLatticeIter(const SkCanvas::Lattice& lattice, const SkRect& dst); 27 28 static bool Valid(int imageWidth, int imageHeight, const SkIRect& center); 29 30 SkLatticeIter(int imageWidth, int imageHeight, const SkIRect& center, const SkRect& dst); 31 32 /** 33 * While it returns true, use src/dst to draw the image/bitmap. Optional parameters 34 * isFixedColor and fixedColor specify if the rectangle is filled with a fixed color. 35 * If (*isFixedColor) is true, then (*fixedColor) contains the rectangle color. 36 */ 37 bool next(SkRect* src, SkRect* dst, bool* isFixedColor = nullptr, 38 SkColor* fixedColor = nullptr); 39 40 /** 41 * Apply a matrix to the dst points. 42 */ 43 void mapDstScaleTranslate(const SkMatrix& matrix); 44 45 /** 46 * Returns the number of rects that will actually be drawn. 47 */ 48 int numRectsToDraw() const { 49 return fNumRectsToDraw; 50 } 51 52 private: 53 SkTArray<SkScalar> fSrcX; 54 SkTArray<SkScalar> fSrcY; 55 SkTArray<SkScalar> fDstX; 56 SkTArray<SkScalar> fDstY; 57 SkTArray<SkCanvas::Lattice::RectType> fRectTypes; 58 SkTArray<SkColor> fColors; 59 60 int fCurrX; 61 int fCurrY; 62 int fNumRectsInLattice; 63 int fNumRectsToDraw; 64 }; 65 66 #endif 67
