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| 1 #include "SkRecords.h" |
| 2 #include "SkTLogic.h" |
| 3 |
| 4 // Type traits that are useful for working with SkRecords. |
| 5 |
| 6 namespace SkRecords { |
| 7 |
| 8 namespace { |
| 9 |
| 10 // Abstracts away whether the T is optional or not. |
| 11 template <typename T> const T* as_ptr(const SkRecords::Optional<T>& x) { return
x; } |
| 12 template <typename T> const T* as_ptr(const T& x) { return &x; } |
| 13 |
| 14 } // namespace |
| 15 |
| 16 // Gets the paint from any command that may have one. |
| 17 template <typename Command> const SkPaint* GetPaint(const Command& x) { return a
s_ptr(x.paint); } |
| 18 |
| 19 // Have a paint? You are a draw command! |
| 20 template <typename Command> struct IsDraw { |
| 21 SK_CREATE_MEMBER_DETECTOR(paint); |
| 22 static const bool value = HasMember_paint<Command>::value; |
| 23 }; |
| 24 |
| 25 // Have a clip op? You are a clip command. |
| 26 template <typename Command> struct IsClip { |
| 27 SK_CREATE_MEMBER_DETECTOR(op); |
| 28 static const bool value = HasMember_op<Command>::value; |
| 29 }; |
| 30 |
| 31 } // namespace SkRecords |
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