| /* |
| * Copyright (C) 2013 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 "sky/engine/platform/geometry/FloatRoundedRect.h" |
| |
| #include <algorithm> |
| |
| namespace blink { |
| |
| FloatRoundedRect::FloatRoundedRect(float x, float y, float width, float height) |
| : m_rect(x, y, width, height) |
| { |
| } |
| |
| FloatRoundedRect::FloatRoundedRect(const FloatRect& rect, const Radii& radii) |
| : m_rect(rect) |
| , m_radii(radii) |
| { |
| } |
| |
| FloatRoundedRect::FloatRoundedRect(const FloatRect& rect, const FloatSize& topLeft, const FloatSize& topRight, const FloatSize& bottomLeft, const FloatSize& bottomRight) |
| : m_rect(rect) |
| , m_radii(topLeft, topRight, bottomLeft, bottomRight) |
| { |
| } |
| |
| bool FloatRoundedRect::Radii::isZero() const |
| { |
| return m_topLeft.isZero() && m_topRight.isZero() && m_bottomLeft.isZero() && m_bottomRight.isZero(); |
| } |
| |
| void FloatRoundedRect::Radii::scale(float factor) |
| { |
| if (factor == 1) |
| return; |
| |
| // If either radius on a corner becomes zero, reset both radii on that corner. |
| m_topLeft.scale(factor); |
| if (!m_topLeft.width() || !m_topLeft.height()) |
| m_topLeft = FloatSize(); |
| m_topRight.scale(factor); |
| if (!m_topRight.width() || !m_topRight.height()) |
| m_topRight = FloatSize(); |
| m_bottomLeft.scale(factor); |
| if (!m_bottomLeft.width() || !m_bottomLeft.height()) |
| m_bottomLeft = FloatSize(); |
| m_bottomRight.scale(factor); |
| if (!m_bottomRight.width() || !m_bottomRight.height()) |
| m_bottomRight = FloatSize(); |
| |
| } |
| |
| void FloatRoundedRect::Radii::expand(float topWidth, float bottomWidth, float leftWidth, float rightWidth) |
| { |
| if (m_topLeft.width() > 0 && m_topLeft.height() > 0) { |
| m_topLeft.setWidth(std::max<float>(0, m_topLeft.width() + leftWidth)); |
| m_topLeft.setHeight(std::max<float>(0, m_topLeft.height() + topWidth)); |
| } |
| if (m_topRight.width() > 0 && m_topRight.height() > 0) { |
| m_topRight.setWidth(std::max<float>(0, m_topRight.width() + rightWidth)); |
| m_topRight.setHeight(std::max<float>(0, m_topRight.height() + topWidth)); |
| } |
| if (m_bottomLeft.width() > 0 && m_bottomLeft.height() > 0) { |
| m_bottomLeft.setWidth(std::max<float>(0, m_bottomLeft.width() + leftWidth)); |
| m_bottomLeft.setHeight(std::max<float>(0, m_bottomLeft.height() + bottomWidth)); |
| } |
| if (m_bottomRight.width() > 0 && m_bottomRight.height() > 0) { |
| m_bottomRight.setWidth(std::max<float>(0, m_bottomRight.width() + rightWidth)); |
| m_bottomRight.setHeight(std::max<float>(0, m_bottomRight.height() + bottomWidth)); |
| } |
| } |
| |
| static inline float cornerRectIntercept(float y, const FloatRect& cornerRect) |
| { |
| ASSERT(cornerRect.height() > 0); |
| return cornerRect.width() * sqrt(1 - (y * y) / (cornerRect.height() * cornerRect.height())); |
| } |
| |
| bool FloatRoundedRect::xInterceptsAtY(float y, float& minXIntercept, float& maxXIntercept) const |
| { |
| if (y < rect().y() || y > rect().maxY()) |
| return false; |
| |
| if (!isRounded()) { |
| minXIntercept = rect().x(); |
| maxXIntercept = rect().maxX(); |
| return true; |
| } |
| |
| const FloatRect& topLeftRect = topLeftCorner(); |
| const FloatRect& bottomLeftRect = bottomLeftCorner(); |
| |
| if (!topLeftRect.isEmpty() && y >= topLeftRect.y() && y < topLeftRect.maxY()) |
| minXIntercept = topLeftRect.maxX() - cornerRectIntercept(topLeftRect.maxY() - y, topLeftRect); |
| else if (!bottomLeftRect.isEmpty() && y >= bottomLeftRect.y() && y <= bottomLeftRect.maxY()) |
| minXIntercept = bottomLeftRect.maxX() - cornerRectIntercept(y - bottomLeftRect.y(), bottomLeftRect); |
| else |
| minXIntercept = m_rect.x(); |
| |
| const FloatRect& topRightRect = topRightCorner(); |
| const FloatRect& bottomRightRect = bottomRightCorner(); |
| |
| if (!topRightRect.isEmpty() && y >= topRightRect.y() && y <= topRightRect.maxY()) |
| maxXIntercept = topRightRect.x() + cornerRectIntercept(topRightRect.maxY() - y, topRightRect); |
| else if (!bottomRightRect.isEmpty() && y >= bottomRightRect.y() && y <= bottomRightRect.maxY()) |
| maxXIntercept = bottomRightRect.x() + cornerRectIntercept(y - bottomRightRect.y(), bottomRightRect); |
| else |
| maxXIntercept = m_rect.maxX(); |
| |
| return true; |
| } |
| |
| } // namespace blink |