commit-bot@chromium.org | ad854bf | 2014-05-29 18:46:38 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2014 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 GrRectanizer_skyline_DEFINED |
| 9 | #define GrRectanizer_skyline_DEFINED |
| 10 | |
| 11 | #include "GrRectanizer.h" |
| 12 | #include "SkTDArray.h" |
| 13 | |
| 14 | // Pack rectangles and track the current silhouette |
| 15 | // Based in part on Jukka Jylänki's work at http://clb.demon.fi |
| 16 | class GrRectanizerSkyline : public GrRectanizer { |
| 17 | public: |
| 18 | GrRectanizerSkyline(int w, int h) : INHERITED(w, h) { |
| 19 | this->reset(); |
| 20 | } |
| 21 | |
| 22 | virtual ~GrRectanizerSkyline() { } |
| 23 | |
| 24 | virtual void reset() SK_OVERRIDE{ |
| 25 | fAreaSoFar = 0; |
| 26 | fSkyline.reset(); |
| 27 | SkylineSegment* seg = fSkyline.append(1); |
| 28 | seg->fX = 0; |
| 29 | seg->fY = 0; |
| 30 | seg->fWidth = this->width(); |
| 31 | } |
| 32 | |
| 33 | virtual bool addRect(int w, int h, GrIPoint16* loc) SK_OVERRIDE; |
| 34 | |
| 35 | virtual float percentFull() const SK_OVERRIDE{ |
| 36 | return fAreaSoFar / ((float)this->width() * this->height()); |
| 37 | } |
| 38 | |
| 39 | private: |
| 40 | struct SkylineSegment { |
| 41 | int fX; |
| 42 | int fY; |
| 43 | int fWidth; |
| 44 | }; |
| 45 | |
| 46 | SkTDArray<SkylineSegment> fSkyline; |
| 47 | |
| 48 | int32_t fAreaSoFar; |
| 49 | |
| 50 | bool rectangleFits(int skylineIndex, int width, int height, int* y) const; |
| 51 | void addSkylineLevel(int skylineIndex, int x, int y, int width, int height); |
| 52 | |
| 53 | typedef GrRectanizer INHERITED; |
| 54 | }; |
| 55 | |
| 56 | #endif |