Differential D15514 Diff 42505 libbreezecommon/breezeboxshadowrenderer.h

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libbreezecommon/breezeboxshadowrenderer.h

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		1		/*
		2		* Copyright (C) 2018 Vlad Zagorodniy <vladzzag@gmail.com>
		3		*
		4		* This program is free software; you can redistribute it and/or
		5		* modify it under the terms of the GNU General Public License as
		6		* published by the Free Software Foundation; either version 2 of
		7		* the License or (at your option) version 3 or any later version
		8		* accepted by the membership of KDE e.V. (or its successor approved
		9		* by the membership of KDE e.V.), which shall act as a proxy
		10		* defined in Section 14 of version 3 of the license.
		11		*
		12		* This program is distributed in the hope that it will be useful,
		13		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		14		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		15		* GNU General Public License for more details.
		16		*
		17		* You should have received a copy of the GNU General Public License
		18		* along with this program. If not, see <http://www.gnu.org/licenses/>.
		19		*/
		20
		21		#pragma once
		22
		23		// own
		24		#include "breezecommon_export.h"
		25
		26		// Qt
		27		#include <QImage>
		28		#include <QPoint>
		29		#include <QSize>
		30
		31		namespace Breeze
		32		{
		33
		34		class BREEZECOMMON_EXPORT BoxShadowRenderer
		35		{
		36		public:
		37		// Compiler generated constructors & destructor are fine.
		38
		39		/**
		40		* Set the size of the box
		41		* @param size The size of the box
		42		**/
		43		void setBoxSize(const QSize &size);
		44
		45		/**
		46		* Set the radius of box' corners
		47		* @param radius The border radius
		48		**/
		49		void setBorderRadius(qreal radius);
		50
		51		/**
		52		* Set the device pixel ratio of the resulting shadow texture
		53		* @param dpr The device pixel ratio
		54		**/
		55		void setDevicePixelRatio(qreal dpr);
		56
		57		/**
		58		* Add a shadow
		59		* @param offset The offset of the shadow
		60		* @param radius The blur radius
		61		* @param color The color of the shadow
		62		**/
		63		void addShadow(const QPoint &offset, int radius, const QColor &color);
		64
		65		/**
		66		* Render the shadow
		67		**/
		68		QImage render() const;
		69
		70		/**
		71		* Calculate minimum required size of the box
		72		*
		73		* @param radius The blur radius
		74		**/
		75		static QSize minimumRequiredBoxSize(int radius);
		76
		77		/**
		78		*
		79		* @param boxSize The size of the box
		80		* @param radius The blur radius
		81		* @param offset The offset of the shadow
		82		**/
		83		static QSize minimumRequiredCanvasSize(const QSize &boxSize, int radius, const QPoint &offset);
		84
		85		private:
		86		QSize m_boxSize;
		87		qreal m_borderRadius = 0.0;
		88		qreal m_dpr = 1.0;
		89
		90		struct Shadow {
		91		QPoint offset;
		92		int radius;
		93		QColor color;
		94		};
		95
		96		QVector<Shadow> m_shadows;
		97		};
		98
		99		} // namespace Breeze