composition.h Example File

painting/composition/composition.h
/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * 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. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** 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 ** OWNER 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/
#ifndef COMPOSITION_H #define COMPOSITION_H #include "arthurwidgets.h" #if QT_CONFIG(opengl) #include "fbopaintdevice.h" #include <QOpenGLTextureBlitter> #endif #include <QPainter> #include <QEvent> class QPushButton; class QRadioButton; class CompositionWidget : public QWidget { Q_OBJECT public: CompositionWidget(QWidget *parent); public slots: void nextMode(); private: bool m_cycle_enabled; QRadioButton *rbClear; QRadioButton *rbSource; QRadioButton *rbDest; QRadioButton *rbSourceOver; QRadioButton *rbDestOver; QRadioButton *rbSourceIn; QRadioButton *rbDestIn; QRadioButton *rbSourceOut; QRadioButton *rbDestOut; QRadioButton *rbSourceAtop; QRadioButton *rbDestAtop; QRadioButton *rbXor; QRadioButton *rbPlus; QRadioButton *rbMultiply; QRadioButton *rbScreen; QRadioButton *rbOverlay; QRadioButton *rbDarken; QRadioButton *rbLighten; QRadioButton *rbColorDodge; QRadioButton *rbColorBurn; QRadioButton *rbHardLight; QRadioButton *rbSoftLight; QRadioButton *rbDifference; QRadioButton *rbExclusion; }; class CompositionRenderer : public ArthurFrame { Q_OBJECT enum ObjectType { NoObject, Circle, Rectangle, Image }; Q_PROPERTY(int circleColor READ circleColor WRITE setCircleColor) Q_PROPERTY(int circleAlpha READ circleAlpha WRITE setCircleAlpha) Q_PROPERTY(bool animation READ animationEnabled WRITE setAnimationEnabled) public: CompositionRenderer(QWidget *parent); void paint(QPainter *) override; void setCirclePos(const QPointF &pos); QSize sizeHint() const override { return QSize(500, 400); } bool animationEnabled() const { return m_animation_enabled; } int circleColor() const { return m_circle_hue; } int circleAlpha() const { return m_circle_alpha; } protected: void mousePressEvent(QMouseEvent *) override; void mouseMoveEvent(QMouseEvent *) override; void mouseReleaseEvent(QMouseEvent *) override; void timerEvent(QTimerEvent *) override; public slots: void setClearMode() { m_composition_mode = QPainter::CompositionMode_Clear; update(); } void setSourceMode() { m_composition_mode = QPainter::CompositionMode_Source; update(); } void setDestMode() { m_composition_mode = QPainter::CompositionMode_Destination; update(); } void setSourceOverMode() { m_composition_mode = QPainter::CompositionMode_SourceOver; update(); } void setDestOverMode() { m_composition_mode = QPainter::CompositionMode_DestinationOver; update(); } void setSourceInMode() { m_composition_mode = QPainter::CompositionMode_SourceIn; update(); } void setDestInMode() { m_composition_mode = QPainter::CompositionMode_DestinationIn; update(); } void setSourceOutMode() { m_composition_mode = QPainter::CompositionMode_SourceOut; update(); } void setDestOutMode() { m_composition_mode = QPainter::CompositionMode_DestinationOut; update(); } void setSourceAtopMode() { m_composition_mode = QPainter::CompositionMode_SourceAtop; update(); } void setDestAtopMode() { m_composition_mode = QPainter::CompositionMode_DestinationAtop; update(); } void setXorMode() { m_composition_mode = QPainter::CompositionMode_Xor; update(); } void setPlusMode() { m_composition_mode = QPainter::CompositionMode_Plus; update(); } void setMultiplyMode() { m_composition_mode = QPainter::CompositionMode_Multiply; update(); } void setScreenMode() { m_composition_mode = QPainter::CompositionMode_Screen; update(); } void setOverlayMode() { m_composition_mode = QPainter::CompositionMode_Overlay; update(); } void setDarkenMode() { m_composition_mode = QPainter::CompositionMode_Darken; update(); } void setLightenMode() { m_composition_mode = QPainter::CompositionMode_Lighten; update(); } void setColorDodgeMode() { m_composition_mode = QPainter::CompositionMode_ColorDodge; update(); } void setColorBurnMode() { m_composition_mode = QPainter::CompositionMode_ColorBurn; update(); } void setHardLightMode() { m_composition_mode = QPainter::CompositionMode_HardLight; update(); } void setSoftLightMode() { m_composition_mode = QPainter::CompositionMode_SoftLight; update(); } void setDifferenceMode() { m_composition_mode = QPainter::CompositionMode_Difference; update(); } void setExclusionMode() { m_composition_mode = QPainter::CompositionMode_Exclusion; update(); } void setCircleAlpha(int alpha) { m_circle_alpha = alpha; update(); } void setCircleColor(int hue) { m_circle_hue = hue; update(); } void setAnimationEnabled(bool enabled); private: void updateCirclePos(); void drawBase(QPainter &p); void drawSource(QPainter &p); QPainter::CompositionMode m_composition_mode; QImage m_image; QImage m_buffer; QImage m_base_buffer; int m_circle_alpha; int m_circle_hue; QPointF m_circle_pos; QPointF m_offset; ObjectType m_current_object; bool m_animation_enabled; int m_animationTimer; #if QT_CONFIG(opengl) QScopedPointer<QFboPaintDevice> m_fbo; int m_pbuffer_size; // width==height==size of pbuffer uint m_base_tex; uint m_compositing_tex; QSize m_previous_size; QOpenGLTextureBlitter m_blitter; #endif }; #endif // COMPOSITION_H

© 2018 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.