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 "include/core/SkCanvas.h" 12 #include "include/core/SkScalar.h" 13 #include "include/private/base/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_SPI 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(SkIRect* src, SkRect* dst, bool* isFixedColor = nullptr, 38 SkColor* fixedColor = nullptr); 39 40 /** Version of above that converts the integer src rect to a scalar rect. */ 41 bool next(SkRect* src, SkRect* dst, bool* isFixedColor = nullptr, 42 SkColor* fixedColor = nullptr) { 43 SkIRect isrcR; 44 if (this->next(&isrcR, dst, isFixedColor, fixedColor)) { 45 *src = SkRect::Make(isrcR); 46 return true; 47 } 48 return false; 49 } 50 51 /** 52 * Apply a matrix to the dst points. 53 */ 54 void mapDstScaleTranslate(const SkMatrix& matrix); 55 56 /** 57 * Returns the number of rects that will actually be drawn. 58 */ numRectsToDraw()59 int numRectsToDraw() const { 60 return fNumRectsToDraw; 61 } 62 63 private: 64 SkTArray<int> fSrcX; 65 SkTArray<int> fSrcY; 66 SkTArray<SkScalar> fDstX; 67 SkTArray<SkScalar> fDstY; 68 SkTArray<SkCanvas::Lattice::RectType> fRectTypes; 69 SkTArray<SkColor> fColors; 70 71 int fCurrX; 72 int fCurrY; 73 int fNumRectsInLattice; 74 int fNumRectsToDraw; 75 }; 76 77 #endif 78