| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkNinePatchIter.h" |
| #include "SkRect.h" |
| |
| bool SkNinePatchIter::Valid(int width, int height, const SkIRect& center) { |
| return !center.isEmpty() && SkIRect::MakeWH(width, height).contains(center); |
| } |
| |
| SkNinePatchIter::SkNinePatchIter(int w, int h, const SkIRect& c, const SkRect& dst) { |
| SkASSERT(SkIRect::MakeWH(w, h).contains(c)); |
| |
| fSrcX[0] = 0; |
| fSrcX[1] = SkIntToScalar(c.fLeft); |
| fSrcX[2] = SkIntToScalar(c.fRight); |
| fSrcX[3] = SkIntToScalar(w); |
| |
| fSrcY[0] = 0; |
| fSrcY[1] = SkIntToScalar(c.fTop); |
| fSrcY[2] = SkIntToScalar(c.fBottom); |
| fSrcY[3] = SkIntToScalar(h); |
| |
| fDstX[0] = dst.fLeft; |
| fDstX[1] = dst.fLeft + SkIntToScalar(c.fLeft); |
| fDstX[2] = dst.fRight - SkIntToScalar(w - c.fRight); |
| fDstX[3] = dst.fRight; |
| |
| fDstY[0] = dst.fTop; |
| fDstY[1] = dst.fTop + SkIntToScalar(c.fTop); |
| fDstY[2] = dst.fBottom - SkIntToScalar(h - c.fBottom); |
| fDstY[3] = dst.fBottom; |
| |
| if (fDstX[1] > fDstX[2]) { |
| fDstX[1] = fDstX[0] + (fDstX[3] - fDstX[0]) * c.fLeft / (w - c.width()); |
| fDstX[2] = fDstX[1]; |
| } |
| |
| if (fDstY[1] > fDstY[2]) { |
| fDstY[1] = fDstY[0] + (fDstY[3] - fDstY[0]) * c.fTop / (h - c.height()); |
| fDstY[2] = fDstY[1]; |
| } |
| |
| fCurrX = fCurrY = 0; |
| fDone = false; |
| } |
| |
| bool SkNinePatchIter::next(SkRect* src, SkRect* dst) { |
| if (fDone) { |
| return false; |
| } |
| |
| const int x = fCurrX; |
| const int y = fCurrY; |
| SkASSERT(x >= 0 && x < 4); |
| SkASSERT(y >= 0 && y < 4); |
| |
| src->set(fSrcX[x], fSrcY[y], fSrcX[x + 1], fSrcY[y + 1]); |
| dst->set(fDstX[x], fDstY[y], fDstX[x + 1], fDstY[y + 1]); |
| if (4 == ++fCurrX) { |
| fCurrX = 0; |
| fCurrY += 1; |
| if (fCurrY >= 4) { |
| fDone = true; |
| } |
| } |
| return true; |
| } |