| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkLatticeIter_DEFINED |
| #define SkLatticeIter_DEFINED |
| |
| #include "SkCanvas.h" |
| #include "SkScalar.h" |
| #include "SkTArray.h" |
| |
| struct SkIRect; |
| struct SkRect; |
| |
| /** |
| * Disect a lattice request into an sequence of src-rect / dst-rect pairs |
| */ |
| class SkLatticeIter { |
| public: |
| |
| static bool Valid(int imageWidth, int imageHeight, const SkCanvas::Lattice& lattice); |
| |
| SkLatticeIter(int imageWidth, int imageHeight, const SkCanvas::Lattice& lattice, |
| const SkRect& dst); |
| |
| static bool Valid(int imageWidth, int imageHeight, const SkIRect& center); |
| |
| SkLatticeIter(int imageWidth, int imageHeight, const SkIRect& center, const SkRect& dst); |
| |
| /** |
| * While it returns true, use src/dst to draw the image/bitmap |
| */ |
| bool next(SkRect* src, SkRect* dst); |
| |
| /** |
| * Apply a matrix to the dst points. |
| */ |
| void mapDstScaleTranslate(const SkMatrix& matrix); |
| |
| /** |
| * Returns the total number of rects that will be drawn. |
| */ |
| int numRects() const { |
| return fNumRects; |
| } |
| |
| private: |
| SkTArray<SkScalar> fSrcX; |
| SkTArray<SkScalar> fSrcY; |
| SkTArray<SkScalar> fDstX; |
| SkTArray<SkScalar> fDstY; |
| |
| int fCurrX; |
| int fCurrY; |
| bool fDone; |
| int fNumRects; |
| }; |
| |
| #endif |