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| 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 #include "SkNinePatchIter.h" |
| 9 #include "SkRect.h" |
| 10 |
| 11 bool SkNinePatchIter::Valid(int width, int height, const SkIRect& center) { |
| 12 return !center.isEmpty() && SkIRect::MakeWH(width, height).contains(center); |
| 13 } |
| 14 |
| 15 SkNinePatchIter::SkNinePatchIter(int w, int h, const SkIRect& c, const SkRect& d
st) { |
| 16 SkASSERT(SkIRect::MakeWH(w, h).contains(c)); |
| 17 |
| 18 fSrcX[0] = 0; |
| 19 fSrcX[1] = SkIntToScalar(c.fLeft); |
| 20 fSrcX[2] = SkIntToScalar(c.fRight); |
| 21 fSrcX[3] = SkIntToScalar(w); |
| 22 |
| 23 fSrcY[0] = 0; |
| 24 fSrcY[1] = SkIntToScalar(c.fTop); |
| 25 fSrcY[2] = SkIntToScalar(c.fBottom); |
| 26 fSrcY[3] = SkIntToScalar(h); |
| 27 |
| 28 fDstX[0] = dst.fLeft; |
| 29 fDstX[1] = dst.fLeft + SkIntToScalar(c.fLeft); |
| 30 fDstX[2] = dst.fRight - SkIntToScalar(w - c.fRight); |
| 31 fDstX[3] = dst.fRight; |
| 32 |
| 33 fDstY[0] = dst.fTop; |
| 34 fDstY[1] = dst.fTop + SkIntToScalar(c.fTop); |
| 35 fDstY[2] = dst.fBottom - SkIntToScalar(h - c.fBottom); |
| 36 fDstY[3] = dst.fBottom; |
| 37 |
| 38 if (fDstX[1] > fDstX[2]) { |
| 39 fDstX[1] = fDstX[0] + (fDstX[3] - fDstX[0]) * c.fLeft / (w - c.width()); |
| 40 fDstX[2] = fDstX[1]; |
| 41 } |
| 42 |
| 43 if (fDstY[1] > fDstY[2]) { |
| 44 fDstY[1] = fDstY[0] + (fDstY[3] - fDstY[0]) * c.fTop / (h - c.height()); |
| 45 fDstY[2] = fDstY[1]; |
| 46 } |
| 47 |
| 48 fCurrX = fCurrY = 0; |
| 49 fDone = false; |
| 50 } |
| 51 |
| 52 bool SkNinePatchIter::next(SkRect* src, SkRect* dst) { |
| 53 if (fDone) { |
| 54 return false; |
| 55 } |
| 56 |
| 57 const int x = fCurrX; |
| 58 const int y = fCurrY; |
| 59 SkASSERT(x >= 0 && x < 4); |
| 60 SkASSERT(y >= 0 && y < 4); |
| 61 |
| 62 src->set(fSrcX[x], fSrcY[y], fSrcX[x + 1], fSrcY[y + 1]); |
| 63 dst->set(fDstX[x], fDstY[y], fDstX[x + 1], fDstY[y + 1]); |
| 64 if (4 == ++fCurrX) { |
| 65 fCurrX = 0; |
| 66 fCurrY += 1; |
| 67 if (fCurrY >= 4) { |
| 68 fDone = true; |
| 69 } |
| 70 } |
| 71 return true; |
| 72 } |
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