94 lines
2.1 KiB
C++
94 lines
2.1 KiB
C++
/*
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* SPDX-FileCopyrightText: 2018 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#pragma once
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// own
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#include "breezecommon_export.h"
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// Qt
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#include <QColor>
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#include <QImage>
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#include <QPoint>
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#include <QSize>
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namespace Breeze
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{
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class BREEZECOMMON_EXPORT BoxShadowRenderer
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{
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public:
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// Compiler generated constructors & destructor are fine.
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/**
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* Set the size of the box.
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* @param size The size of the box.
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**/
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void setBoxSize(const QSize &size);
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/**
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* Set the radius of box' corners.
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* @param radius The border radius, in pixels.
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**/
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void setBorderRadius(qreal radius);
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/**
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* Set the device pixel ratio of the resulting shadow texture.
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* @param dpr The device pixel ratio.
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**/
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void setDevicePixelRatio(qreal dpr);
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/**
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* Add a shadow.
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* @param offset The offset of the shadow.
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* @param radius The blur radius.
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* @param color The color of the shadow.
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**/
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void addShadow(const QPoint &offset, int radius, const QColor &color);
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/**
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* Render the shadow.
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**/
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QImage render() const;
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/**
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* Calculate the minimum size of the box.
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*
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* This helper computes the minimum size of the box so the shadow behind it has
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* full its strength.
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*
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* @param radius The blur radius of the shadow.
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**/
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static QSize calculateMinimumBoxSize(int radius);
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/**
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* Calculate the minimum size of the shadow texture.
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*
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* This helper computes the minimum size of the resulting texture so the shadow
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* is not clipped.
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*
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* @param boxSize The size of the box.
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* @param radius The blur radius.
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* @param offset The offset of the shadow.
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**/
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static QSize calculateMinimumShadowTextureSize(const QSize &boxSize, int radius, const QPoint &offset);
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private:
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QSize m_boxSize;
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qreal m_borderRadius = 0.0;
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qreal m_dpr = 1.0;
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struct Shadow {
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QPoint offset;
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int radius;
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QColor color;
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};
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QVector<Shadow> m_shadows;
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};
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} // namespace Breeze
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