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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 "Shape.h"
#include "BasicShapeFunctions.h"
#include "FloatSize.h"
#include "LengthFunctions.h"
#include "PolygonShape.h"
#include "RectangleShape.h"
#include "WindRule.h"
#include <wtf/MathExtras.h>
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
namespace WebCore {
static PassOwnPtr<Shape> createRectangleShape(const FloatRect& bounds, const FloatSize& radii)
{
ASSERT(bounds.width() >= 0 && bounds.height() >= 0 && radii.width() >= 0 && radii.height() >= 0);
return adoptPtr(new RectangleShape(bounds, radii));
}
static PassOwnPtr<Shape> createShapeCircle(const FloatPoint& center, float radius)
{
ASSERT(radius >= 0);
return adoptPtr(new RectangleShape(FloatRect(center.x() - radius, center.y() - radius, radius*2, radius*2), FloatSize(radius, radius)));
}
static PassOwnPtr<Shape> createShapeEllipse(const FloatPoint& center, const FloatSize& radii)
{
ASSERT(radii.width() >= 0 && radii.height() >= 0);
return adoptPtr(new RectangleShape(FloatRect(center.x() - radii.width(), center.y() - radii.height(), radii.width()*2, radii.height()*2), radii));
}
static PassOwnPtr<Shape> createPolygonShape(PassOwnPtr<Vector<FloatPoint> > vertices, WindRule fillRule)
{
return adoptPtr(new PolygonShape(vertices, fillRule));
}
static inline FloatRect physicalRectToLogical(const FloatRect& rect, float logicalBoxHeight, WritingMode writingMode)
{
if (isHorizontalWritingMode(writingMode))
return rect;
if (isFlippedBlocksWritingMode(writingMode))
return FloatRect(rect.y(), logicalBoxHeight - rect.maxX(), rect.height(), rect.width());
return rect.transposedRect();
}
static inline FloatPoint physicalPointToLogical(const FloatPoint& point, float logicalBoxHeight, WritingMode writingMode)
{
if (isHorizontalWritingMode(writingMode))
return point;
if (isFlippedBlocksWritingMode(writingMode))
return FloatPoint(point.y(), logicalBoxHeight - point.x());
return point.transposedPoint();
}
static inline FloatSize physicalSizeToLogical(const FloatSize& size, WritingMode writingMode)
{
if (isHorizontalWritingMode(writingMode))
return size;
return size.transposedSize();
}
static inline void ensureRadiiDoNotOverlap(FloatRect &bounds, FloatSize &radii)
{
float widthRatio = bounds.width() / (2 * radii.width());
float heightRatio = bounds.height() / (2 * radii.height());
float reductionRatio = std::min<float>(widthRatio, heightRatio);
if (reductionRatio < 1) {
radii.setWidth(reductionRatio * radii.width());
radii.setHeight(reductionRatio * radii.height());
}
}
PassOwnPtr<Shape> Shape::createShape(const BasicShape* basicShape, const LayoutSize& logicalBoxSize, WritingMode writingMode, Length margin, Length padding)
{
ASSERT(basicShape);
bool horizontalWritingMode = isHorizontalWritingMode(writingMode);
float boxWidth = horizontalWritingMode ? logicalBoxSize.width() : logicalBoxSize.height();
float boxHeight = horizontalWritingMode ? logicalBoxSize.height() : logicalBoxSize.width();
OwnPtr<Shape> shape;
switch (basicShape->type()) {
case BasicShape::BasicShapeRectangleType: {
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));
FloatSize cornerRadii(
floatValueForLength(rectangle->cornerRadiusX(), boxWidth),
floatValueForLength(rectangle->cornerRadiusY(), boxHeight));
ensureRadiiDoNotOverlap(bounds, cornerRadii);
FloatRect logicalBounds = physicalRectToLogical(bounds, logicalBoxSize.height(), writingMode);
shape = createRectangleShape(logicalBounds, physicalSizeToLogical(cornerRadii, writingMode));
break;
}
case BasicShape::BasicShapeCircleType: {
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::min(boxHeight, boxWidth));
FloatPoint logicalCenter = physicalPointToLogical(FloatPoint(centerX, centerY), logicalBoxSize.height(), writingMode);
shape = createShapeCircle(logicalCenter, radius);
break;
}
case BasicShape::BasicShapeEllipseType: {
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);
FloatPoint logicalCenter = physicalPointToLogical(FloatPoint(centerX, centerY), logicalBoxSize.height(), writingMode);
FloatSize logicalRadii = physicalSizeToLogical(FloatSize(radiusX, radiusY), writingMode);
shape = createShapeEllipse(logicalCenter, logicalRadii);
break;
}
case BasicShape::BasicShapePolygonType: {
const BasicShapePolygon* polygon = static_cast<const BasicShapePolygon*>(basicShape);
const Vector<Length>& values = polygon->values();
size_t valuesSize = values.size();
ASSERT(!(valuesSize % 2));
OwnPtr<Vector<FloatPoint> > vertices = adoptPtr(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] = physicalPointToLogical(vertex, logicalBoxSize.height(), writingMode);
}
shape = createPolygonShape(vertices.release(), polygon->windRule());
break;
}
case BasicShape::BasicShapeInsetRectangleType: {
const BasicShapeInsetRectangle* rectangle = static_cast<const BasicShapeInsetRectangle*>(basicShape);
float left = floatValueForLength(rectangle->left(), boxWidth);
float top = floatValueForLength(rectangle->top(), boxHeight);
FloatRect bounds(
left,
top,
boxWidth - left - floatValueForLength(rectangle->right(), boxWidth),
boxHeight - top - floatValueForLength(rectangle->bottom(), boxHeight));
FloatSize cornerRadii(
floatValueForLength(rectangle->cornerRadiusX(), boxWidth),
floatValueForLength(rectangle->cornerRadiusY(), boxHeight));
ensureRadiiDoNotOverlap(bounds, cornerRadii);
FloatRect logicalBounds = physicalRectToLogical(bounds, logicalBoxSize.height(), writingMode);
shape = createRectangleShape(logicalBounds, physicalSizeToLogical(cornerRadii, writingMode));
break;
}
default:
ASSERT_NOT_REACHED();
}
shape->m_writingMode = writingMode;
shape->m_margin = floatValueForLength(margin, 0);
shape->m_padding = floatValueForLength(padding, 0);
return shape.release();
}
} // namespace WebCore
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