diff options
Diffstat (limited to 'include/pathops')
| -rw-r--r-- | include/pathops/SkPathOps.h | 42 |
1 files changed, 36 insertions, 6 deletions
diff --git a/include/pathops/SkPathOps.h b/include/pathops/SkPathOps.h index ba18f4ba72..61a7076964 100644 --- a/include/pathops/SkPathOps.h +++ b/include/pathops/SkPathOps.h @@ -8,6 +8,8 @@ #define SkPathOps_DEFINED #include "SkPreConfig.h" +#include "SkTArray.h" +#include "SkTDArray.h" class SkPath; struct SkRect; @@ -17,11 +19,11 @@ struct SkRect; * The logical operations that can be performed when combining two paths. */ enum SkPathOp { - kDifference_PathOp, //!< subtract the op path from the first path - kIntersect_PathOp, //!< intersect the two paths - kUnion_PathOp, //!< union (inclusive-or) the two paths - kXOR_PathOp, //!< exclusive-or the two paths - kReverseDifference_PathOp, //!< subtract the first path from the op path + kDifference_SkPathOp, //!< subtract the op path from the first path + kIntersect_SkPathOp, //!< intersect the two paths + kUnion_SkPathOp, //!< union (inclusive-or) the two paths + kXOR_SkPathOp, //!< exclusive-or the two paths + kReverseDifference_SkPathOp, //!< subtract the first path from the op path }; /** Set this path to the result of applying the Op to this path and the @@ -35,9 +37,10 @@ enum SkPathOp { @param one The first operand (for difference, the minuend) @param two The second operand (for difference, the subtrahend) + @param op The operator to apply. @param result The product of the operands. The result may be one of the inputs. - @return True if operation succeeded. + @return True if the operation succeeded. */ bool SK_API Op(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result); @@ -63,4 +66,31 @@ bool SK_API Simplify(const SkPath& path, SkPath* result); */ bool SK_API TightBounds(const SkPath& path, SkRect* result); +/** Perform a series of path operations, optimized for unioning many paths together. + */ +class SK_API SkOpBuilder { +public: + /** Add one or more paths and their operand. The builder is empty before the first + path is added, so the result of a single add is (emptyPath OP path). + + @param path The second operand. + @param _operator The operator to apply to the existing and supplied paths. + */ + void add(const SkPath& path, SkPathOp _operator); + + /** Computes the sum of all paths and operands, and resets the builder to its + initial state. + + @param result The product of the operands. + @return True if the operation succeeded. + */ + bool resolve(SkPath* result); + +private: + SkTArray<SkPath> fPathRefs; + SkTDArray<SkPathOp> fOps; + + void reset(); +}; + #endif |