+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All rights reserved.
+ *
+ * Licensed under the LGPL License, Version 2.1 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.gnu.org/licenses/
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
#include "vdasher.h"
#include "vbezier.h"
+#include "vline.h"
V_BEGIN_NAMESPACE
-class VLine {
-public:
- VLine() : mX1(0), mY1(0), mX2(0), mY2(0) {}
- VLine(float x1, float y1, float x2, float y2)
- : mX1(x1), mY1(y1), mX2(x2), mY2(y2)
- {
- }
- VLine(const VPointF &p1, const VPointF &p2)
- : mX1(p1.x()), mY1(p1.y()), mX2(p2.x()), mY2(p2.y())
- {
- }
- float length() const;
- void splitAtLength(float length, VLine &left, VLine &right) const;
- VPointF p1() const { return VPointF(mX1, mY1); }
- VPointF p2() const { return VPointF(mX2, mY2); }
-
-private:
- float mX1;
- float mY1;
- float mX2;
- float mY2;
-};
-
-// approximate sqrt(x*x + y*y) using alpha max plus beta min algorithm.
-// With alpha = 1, beta = 3/8, giving results with the largest error less
-// than 7% compared to the exact value.
-float VLine::length() const
-{
- float x = mX2 - mX1;
- float y = mY2 - mY1;
- x = x < 0 ? -x : x;
- y = y < 0 ? -y : y;
- return (x > y ? x + 0.375 * y : y + 0.375 * x);
-}
-
-void VLine::splitAtLength(float lengthAt, VLine &left, VLine &right) const
-{
- float len = length();
- double dx = ((mX2 - mX1) / len) * lengthAt;
- double dy = ((mY2 - mY1) / len) * lengthAt;
-
- left.mX1 = mX1;
- left.mY1 = mY1;
- left.mX2 = left.mX1 + dx;
- left.mY2 = left.mY1 + dy;
-
- right.mX1 = left.mX2;
- right.mY1 = left.mY2;
- right.mX2 = mX2;
- right.mY2 = mY2;
-}
-
VDasher::VDasher(const float *dashArray, int size)
{
- if (!(size % 2)) vCritical << "invalid dashArray format";
-
mDashArray = reinterpret_cast<const VDasher::Dash *>(dashArray);
mArraySize = size / 2;
- mDashOffset = dashArray[size - 1];
+ if (size % 2)
+ mDashOffset = dashArray[size - 1];
mIndex = 0;
mCurrentLength = 0;
mDiscard = false;
} else {
mCurrentLength = mDashArray[mIndex].length;
}
+ if (vIsZero(mCurrentLength)) updateActiveSegment();
}
void VDasher::addLine(const VPointF &p)
mDiscard = true;
mCurrentLength = mDashArray[mIndex].gap;
}
+ if (vIsZero(mCurrentLength)) updateActiveSegment();
}
void VDasher::lineTo(const VPointF &p)
VPath VDasher::dashed(const VPath &path)
{
- if (path.isEmpty()) return VPath();
+ if (path.empty()) return VPath();
mResult = VPath();
mIndex = 0;