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/*
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ExclusionShape.h"
#include "BasicShapeFunctions.h"
#include "ExclusionPolygon.h"
#include "ExclusionRectangle.h"
#include "FloatSize.h"
#include "LengthFunctions.h"
#include "WindRule.h"
#include <wtf/MathExtras.h>
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
namespace WebCore {
static PassOwnPtr<ExclusionShape> createExclusionRectangle(const FloatRect& bounds, const FloatSize& radii)
{
ASSERT(bounds.width() >= 0 && bounds.height() >= 0 && radii.width() >= 0 && radii.height() >= 0);
return adoptPtr(new ExclusionRectangle(bounds, radii));
}
static PassOwnPtr<ExclusionShape> createExclusionCircle(const FloatPoint& center, float radius)
{
ASSERT(radius >= 0);
return adoptPtr(new ExclusionRectangle(FloatRect(center.x() - radius, center.y() - radius, radius*2, radius*2), FloatSize(radius, radius)));
}
static PassOwnPtr<ExclusionShape> createExclusionEllipse(const FloatPoint& center, const FloatSize& radii)
{
ASSERT(radii.width() >= 0 && radii.height() >= 0);
return adoptPtr(new ExclusionRectangle(FloatRect(center.x() - radii.width(), center.y() - radii.height(), radii.width()*2, radii.height()*2), radii));
}
static PassOwnPtr<ExclusionShape> createExclusionPolygon(PassOwnPtr<Vector<FloatPoint> > vertices, WindRule fillRule)
{
return adoptPtr(new ExclusionPolygon(vertices, fillRule));
}
// If the writingMode is vertical, then the BasicShape's (physical) x and y coordinates are swapped, so that
// line segments are parallel to the internal coordinate system's X axis.
PassOwnPtr<ExclusionShape> ExclusionShape::createExclusionShape(const BasicShape* basicShape, float logicalBoxWidth, float logicalBoxHeight, WritingMode writingMode)
{
ASSERT(basicShape);
bool horizontalWritingMode = isHorizontalWritingMode(writingMode);
float boxWidth = horizontalWritingMode ? logicalBoxWidth : logicalBoxHeight;
float boxHeight = horizontalWritingMode ? logicalBoxHeight : logicalBoxWidth;
OwnPtr<ExclusionShape> exclusionShape;
switch (basicShape->type()) {
case BasicShape::BASIC_SHAPE_RECTANGLE: {
const BasicShapeRectangle* rectangle = static_cast<const BasicShapeRectangle*>(basicShape);
FloatRect bounds(
floatValueForLength(rectangle->x(), boxWidth),
floatValueForLength(rectangle->y(), boxHeight),
floatValueForLength(rectangle->width(), boxWidth),
floatValueForLength(rectangle->height(), boxHeight));
Length radiusXLength = rectangle->cornerRadiusX();
Length radiusYLength = rectangle->cornerRadiusY();
FloatSize cornerRadii(
radiusXLength.isUndefined() ? 0 : floatValueForLength(radiusXLength, boxWidth),
radiusYLength.isUndefined() ? 0 : floatValueForLength(radiusYLength, boxHeight));
exclusionShape = horizontalWritingMode
? createExclusionRectangle(bounds, cornerRadii)
: createExclusionRectangle(bounds.transposedRect(), cornerRadii.transposedSize());
exclusionShape->m_boundingBox = bounds;
break;
}
case BasicShape::BASIC_SHAPE_CIRCLE: {
const BasicShapeCircle* circle = static_cast<const BasicShapeCircle*>(basicShape);
float centerX = floatValueForLength(circle->centerX(), boxWidth);
float centerY = floatValueForLength(circle->centerY(), boxHeight);
float radius = floatValueForLength(circle->radius(), std::max(boxHeight, boxWidth));
exclusionShape = horizontalWritingMode
? createExclusionCircle(FloatPoint(centerX, centerY), radius)
: createExclusionCircle(FloatPoint(centerY, centerX), radius);
exclusionShape->m_boundingBox = FloatRect(centerX - radius, centerY - radius, radius * 2, radius * 2);
break;
}
case BasicShape::BASIC_SHAPE_ELLIPSE: {
const BasicShapeEllipse* ellipse = static_cast<const BasicShapeEllipse*>(basicShape);
float centerX = floatValueForLength(ellipse->centerX(), boxWidth);
float centerY = floatValueForLength(ellipse->centerY(), boxHeight);
float radiusX = floatValueForLength(ellipse->radiusX(), boxWidth);
float radiusY = floatValueForLength(ellipse->radiusY(), boxHeight);
exclusionShape = horizontalWritingMode
? createExclusionEllipse(FloatPoint(centerX, centerY), FloatSize(radiusX, radiusY))
: createExclusionEllipse(FloatPoint(centerY, centerX), FloatSize(radiusY, radiusX));
exclusionShape->m_boundingBox = FloatRect(centerX - radiusX, centerY - radiusY, radiusX * 2, radiusY * 2);
break;
}
case BasicShape::BASIC_SHAPE_POLYGON: {
const BasicShapePolygon* polygon = static_cast<const BasicShapePolygon*>(basicShape);
const Vector<Length>& values = polygon->values();
size_t valuesSize = values.size();
ASSERT(!(valuesSize % 2));
FloatRect boundingBox;
Vector<FloatPoint>* vertices = new Vector<FloatPoint>(valuesSize / 2);
for (unsigned i = 0; i < valuesSize; i += 2) {
FloatPoint vertex(
floatValueForLength(values.at(i), boxWidth),
floatValueForLength(values.at(i + 1), boxHeight));
(*vertices)[i / 2] = horizontalWritingMode ? vertex : vertex.transposedPoint();
if (!i)
boundingBox.setLocation(vertex);
else
boundingBox.extend(vertex);
}
exclusionShape = createExclusionPolygon(adoptPtr(vertices), polygon->windRule());
exclusionShape->m_boundingBox = boundingBox;
break;
}
default:
ASSERT_NOT_REACHED();
}
exclusionShape->m_logicalBoxWidth = logicalBoxWidth;
exclusionShape->m_logicalBoxHeight = logicalBoxHeight;
exclusionShape->m_writingMode = writingMode;
return exclusionShape.release();
}
} // namespace WebCore
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