reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | #ifndef SkLayerDrawLooper_DEFINED |
| 2 | #define SkLayerDrawLooper_DEFINED |
| 3 | |
| 4 | #include "SkDrawLooper.h" |
| 5 | |
| 6 | struct SkPoint; |
| 7 | |
| 8 | class SkLayerDrawLooper : public SkDrawLooper { |
| 9 | public: |
| 10 | SkLayerDrawLooper(); |
| 11 | virtual ~SkLayerDrawLooper(); |
| 12 | |
| 13 | /** Call for each layer you want to add (from top to bottom). |
| 14 | This returns a paint you can modify, but that ptr is only valid until |
| 15 | the next call made to this object. |
| 16 | */ |
| 17 | SkPaint* addLayer(SkScalar dx, SkScalar dy); |
| 18 | |
| 19 | /** Helper for addLayer() which passes (0, 0) for the offset parameters |
| 20 | */ |
| 21 | SkPaint* addLayer() { |
| 22 | return this->addLayer(0, 0); |
| 23 | } |
| 24 | |
| 25 | // overrides from SkDrawLooper |
| 26 | virtual void init(SkCanvas*, SkPaint*); |
| 27 | virtual bool next(); |
| 28 | virtual void restore(); |
| 29 | |
| 30 | // must be public for Registrar :( |
| 31 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { |
| 32 | return SkNEW_ARGS(SkLayerDrawLooper, (buffer)); |
| 33 | } |
| 34 | |
| 35 | protected: |
| 36 | SkLayerDrawLooper(SkFlattenableReadBuffer&); |
| 37 | |
| 38 | // overrides from SkFlattenable |
| 39 | virtual void flatten(SkFlattenableWriteBuffer& ); |
| 40 | virtual Factory getFactory() { return CreateProc; } |
| 41 | |
| 42 | private: |
| 43 | struct Rec { |
| 44 | Rec* fNext; |
| 45 | SkPaint fPaint; |
| 46 | SkPoint fOffset; |
| 47 | |
| 48 | static Rec* Reverse(Rec*); |
| 49 | }; |
| 50 | Rec* fRecs; |
| 51 | int fCount; |
| 52 | |
| 53 | struct Iter { |
| 54 | SkPaint fSavedPaint; |
| 55 | SkPaint* fPaint; |
| 56 | SkCanvas* fCanvas; |
| 57 | Rec* fRec; |
| 58 | }; |
| 59 | Iter fIter; |
| 60 | |
| 61 | class MyRegistrar : public SkFlattenable::Registrar { |
| 62 | public: |
| 63 | MyRegistrar(); |
| 64 | }; |
| 65 | |
| 66 | typedef SkDrawLooper INHERITED; |
| 67 | }; |
| 68 | |
| 69 | |
| 70 | #endif |