reed | 4c21dc5 | 2015-06-25 12:32:03 -0700 | [diff] [blame] | 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& dst) { |
| 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; |
joshualitt | 3622d41 | 2015-11-17 12:11:57 -0800 | [diff] [blame] | 59 | SkASSERT(x >= 0 && x < 3); |
| 60 | SkASSERT(y >= 0 && y < 3); |
reed | 4c21dc5 | 2015-06-25 12:32:03 -0700 | [diff] [blame] | 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]); |
joshualitt | 3622d41 | 2015-11-17 12:11:57 -0800 | [diff] [blame] | 64 | if (3 == ++fCurrX) { |
reed | 4c21dc5 | 2015-06-25 12:32:03 -0700 | [diff] [blame] | 65 | fCurrX = 0; |
| 66 | fCurrY += 1; |
joshualitt | 3622d41 | 2015-11-17 12:11:57 -0800 | [diff] [blame] | 67 | if (fCurrY >= 3) { |
reed | 4c21dc5 | 2015-06-25 12:32:03 -0700 | [diff] [blame] | 68 | fDone = true; |
| 69 | } |
| 70 | } |
| 71 | return true; |
| 72 | } |