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26 #ifndef TransformState_h
27 #define TransformState_h
29 #include "AffineTransform.h"
30 #include "FloatPoint.h"
31 #include "FloatQuad.h"
33 #include "TransformationMatrix.h"
34 #include <wtf/OwnPtr.h>
38 class TransformState {
40 enum TransformDirection { ApplyTransformDirection, UnapplyInverseTransformDirection };
41 enum TransformAccumulation { FlattenTransform, AccumulateTransform };
43 TransformState(TransformDirection mappingDirection, const FloatPoint& p, const FloatQuad& quad)
44 : m_lastPlanarPoint(p)
45 , m_lastPlanarQuad(quad)
46 , m_accumulatingTransform(false)
49 , m_direction(mappingDirection)
53 TransformState(TransformDirection mappingDirection, const FloatPoint& p)
54 : m_lastPlanarPoint(p)
55 , m_accumulatingTransform(false)
58 , m_direction(mappingDirection)
62 TransformState(TransformDirection mappingDirection, const FloatQuad& quad)
63 : m_lastPlanarQuad(quad)
64 , m_accumulatingTransform(false)
67 , m_direction(mappingDirection)
71 TransformState(const TransformState& other) { *this = other; }
73 TransformState& operator=(const TransformState&);
75 void setQuad(const FloatQuad& quad) { m_lastPlanarQuad = quad; }
77 void move(const IntSize& s, TransformAccumulation accumulate = FlattenTransform)
79 move(s.width(), s.height(), accumulate);
82 void move(int x, int y, TransformAccumulation = FlattenTransform);
83 void applyTransform(const AffineTransform& transformFromContainer, TransformAccumulation = FlattenTransform);
84 void applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation = FlattenTransform);
87 // Return the coords of the point or quad in the last flattened layer
88 FloatPoint lastPlanarPoint() const { return m_lastPlanarPoint; }
89 FloatQuad lastPlanarQuad() const { return m_lastPlanarQuad; }
91 // Return the point or quad mapped through the current transform
92 FloatPoint mappedPoint() const;
93 FloatQuad mappedQuad() const;
96 void flattenWithTransform(const TransformationMatrix&);
98 FloatPoint m_lastPlanarPoint;
99 FloatQuad m_lastPlanarQuad;
101 // We only allocate the transform if we need to
102 OwnPtr<TransformationMatrix> m_accumulatedTransform;
103 bool m_accumulatingTransform;
104 bool m_mapPoint, m_mapQuad;
105 TransformDirection m_direction;
108 } // namespace WebCore
110 #endif // TransformState_h