reed@google.com | ac10a2d | 2010-12-22 21:39:39 +0000 | [diff] [blame^] | 1 | /* |
| 2 | Copyright 2010 Google Inc. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | |
| 18 | #ifndef GrRectanizer_DEFINED |
| 19 | #define GrRectanizer_DEFINED |
| 20 | |
| 21 | #include "GrRect.h" |
| 22 | #include "GrTDArray.h" |
| 23 | |
| 24 | class GrRectanizerPurgeListener { |
| 25 | public: |
| 26 | virtual ~GrRectanizerPurgeListener() {} |
| 27 | |
| 28 | virtual void notifyPurgeStrip(void*, int yCoord) = 0; |
| 29 | }; |
| 30 | |
| 31 | class GrRectanizer { |
| 32 | public: |
| 33 | GrRectanizer(int width, int height) : fWidth(width), fHeight(height) { |
| 34 | GrAssert(width >= 0); |
| 35 | GrAssert(height >= 0); |
| 36 | } |
| 37 | |
| 38 | virtual ~GrRectanizer() {} |
| 39 | |
| 40 | int width() const { return fWidth; } |
| 41 | int height() const { return fHeight; } |
| 42 | |
| 43 | virtual bool addRect(int width, int height, GrIPoint16* loc) = 0; |
| 44 | virtual float percentFull() const = 0; |
| 45 | |
| 46 | // return the Y-coordinate of a strip that should be purged, given height |
| 47 | // i.e. return the oldest such strip, or some other criteria. Return -1 |
| 48 | // if there is no candidate |
| 49 | virtual int stripToPurge(int height) const = 0; |
| 50 | virtual void purgeStripAtY(int yCoord) = 0; |
| 51 | |
| 52 | /** |
| 53 | * Our factory, which returns the subclass du jour |
| 54 | */ |
| 55 | static GrRectanizer* Factory(int width, int height); |
| 56 | |
| 57 | private: |
| 58 | int fWidth; |
| 59 | int fHeight; |
| 60 | }; |
| 61 | |
| 62 | #endif |
| 63 | |
| 64 | |