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29 #if USE(ACCELERATED_COMPOSITING)
31 #include "cc/CCLayerQuad.h"
35 CCLayerQuad::Edge::Edge(const FloatPoint& p, const FloatPoint& q)
39 FloatPoint tangent(p.y() - q.y(), q.x() - p.x());
40 float cross2 = p.x() * q.y() - q.x() * p.y();
42 set(tangent.x(), tangent.y(), cross2);
43 scale(1.0f / tangent.length());
46 CCLayerQuad::CCLayerQuad(const FloatQuad& quad)
49 m_left = Edge(quad.p4(), quad.p1());
50 m_right = Edge(quad.p2(), quad.p3());
51 m_top = Edge(quad.p1(), quad.p2());
52 m_bottom = Edge(quad.p3(), quad.p4());
54 float sign = quad.isCounterclockwise() ? -1 : 1;
61 FloatQuad CCLayerQuad::floatQuad() const
63 return FloatQuad(m_bottom.intersect(m_left),
64 m_left.intersect(m_top),
65 m_top.intersect(m_right),
66 m_right.intersect(m_bottom));
69 void CCLayerQuad::toFloatArray(float flattened[12]) const
71 flattened[0] = m_left.x();
72 flattened[1] = m_left.y();
73 flattened[2] = m_left.z();
74 flattened[3] = m_top.x();
75 flattened[4] = m_top.y();
76 flattened[5] = m_top.z();
77 flattened[6] = m_right.x();
78 flattened[7] = m_right.y();
79 flattened[8] = m_right.z();
80 flattened[9] = m_bottom.x();
81 flattened[10] = m_bottom.y();
82 flattened[11] = m_bottom.z();
85 } // namespace WebCore
87 #endif // USE(ACCELERATED_COMPOSITING)