Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
261 lines
8.7 KiB
C++
261 lines
8.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef CONTEXT2D_H
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#define CONTEXT2D_H
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#include "domimage.h"
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#include <QPainter>
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#include <QPainterPath>
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#include <QString>
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#include <QStack>
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#include <QMetaType>
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#include <QTimerEvent>
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// [3]
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class CanvasGradient
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{
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public:
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CanvasGradient(const QGradient &v)
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: value(v) {}
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CanvasGradient() {}
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QGradient value;
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};
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// [3]
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Q_DECLARE_METATYPE(CanvasGradient)
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Q_DECLARE_METATYPE(CanvasGradient*)
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class ImageData {
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};
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class QContext2DCanvas;
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//! [0]
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class Context2D : public QObject
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{
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Q_OBJECT
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// compositing
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Q_PROPERTY(qreal globalAlpha READ globalAlpha WRITE setGlobalAlpha)
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Q_PROPERTY(QString globalCompositeOperation READ globalCompositeOperation WRITE setGlobalCompositeOperation)
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Q_PROPERTY(QVariant strokeStyle READ strokeStyle WRITE setStrokeStyle)
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Q_PROPERTY(QVariant fillStyle READ fillStyle WRITE setFillStyle)
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// line caps/joins
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Q_PROPERTY(qreal lineWidth READ lineWidth WRITE setLineWidth)
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Q_PROPERTY(QString lineCap READ lineCap WRITE setLineCap)
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Q_PROPERTY(QString lineJoin READ lineJoin WRITE setLineJoin)
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Q_PROPERTY(qreal miterLimit READ miterLimit WRITE setMiterLimit)
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// shadows
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Q_PROPERTY(qreal shadowOffsetX READ shadowOffsetX WRITE setShadowOffsetX)
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Q_PROPERTY(qreal shadowOffsetY READ shadowOffsetY WRITE setShadowOffsetY)
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Q_PROPERTY(qreal shadowBlur READ shadowBlur WRITE setShadowBlur)
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Q_PROPERTY(QString shadowColor READ shadowColor WRITE setShadowColor)
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//! [0]
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public:
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Context2D(QObject *parent = 0);
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void setSize(int width, int height);
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void setSize(const QSize &size);
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QSize size() const;
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void clear();
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void reset();
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// compositing
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qreal globalAlpha() const; // (default 1.0)
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QString globalCompositeOperation() const; // (default over)
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QVariant strokeStyle() const; // (default black)
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QVariant fillStyle() const; // (default black)
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void setGlobalAlpha(qreal alpha);
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void setGlobalCompositeOperation(const QString &op);
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void setStrokeStyle(const QVariant &style);
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void setFillStyle(const QVariant &style);
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// line caps/joins
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qreal lineWidth() const; // (default 1)
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QString lineCap() const; // "butt", "round", "square" (default "butt")
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QString lineJoin() const; // "round", "bevel", "miter" (default "miter")
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qreal miterLimit() const; // (default 10)
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void setLineWidth(qreal w);
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void setLineCap(const QString &s);
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void setLineJoin(const QString &s);
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void setMiterLimit(qreal m);
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// shadows
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qreal shadowOffsetX() const; // (default 0)
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qreal shadowOffsetY() const; // (default 0)
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qreal shadowBlur() const; // (default 0)
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QString shadowColor() const; // (default black)
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void setShadowOffsetX(qreal x);
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void setShadowOffsetY(qreal y);
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void setShadowBlur(qreal b);
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void setShadowColor(const QString &str);
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//! [1]
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public slots:
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void save(); // push state on state stack
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void restore(); // pop state stack and restore state
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void scale(qreal x, qreal y);
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void rotate(qreal angle);
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void translate(qreal x, qreal y);
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void transform(qreal m11, qreal m12, qreal m21, qreal m22,
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qreal dx, qreal dy);
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void setTransform(qreal m11, qreal m12, qreal m21, qreal m22,
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qreal dx, qreal dy);
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CanvasGradient createLinearGradient(qreal x0, qreal y0,
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qreal x1, qreal y1);
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CanvasGradient createRadialGradient(qreal x0, qreal y0,
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qreal r0, qreal x1,
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qreal y1, qreal r1);
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// rects
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void clearRect(qreal x, qreal y, qreal w, qreal h);
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void fillRect(qreal x, qreal y, qreal w, qreal h);
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void strokeRect(qreal x, qreal y, qreal w, qreal h);
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// path API
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void beginPath();
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void closePath();
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void moveTo(qreal x, qreal y);
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void lineTo(qreal x, qreal y);
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void quadraticCurveTo(qreal cpx, qreal cpy, qreal x, qreal y);
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void bezierCurveTo(qreal cp1x, qreal cp1y,
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qreal cp2x, qreal cp2y, qreal x, qreal y);
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void arcTo(qreal x1, qreal y1, qreal x2, qreal y2, qreal radius);
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void rect(qreal x, qreal y, qreal w, qreal h);
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void arc(qreal x, qreal y, qreal radius,
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qreal startAngle, qreal endAngle,
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bool anticlockwise);
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void fill();
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void stroke();
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void clip();
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bool isPointInPath(qreal x, qreal y) const;
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//! [1]
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// drawing images
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void drawImage(DomImage *image, qreal dx, qreal dy);
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void drawImage(DomImage *image, qreal dx, qreal dy,
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qreal dw, qreal dh);
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void drawImage(DomImage *image, qreal sx, qreal sy,
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qreal sw, qreal sh, qreal dx, qreal dy,
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qreal dw, qreal dh);
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// pixel manipulation
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ImageData getImageData(qreal sx, qreal sy, qreal sw, qreal sh);
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void putImageData(ImageData image, qreal dx, qreal dy);
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//! [2]
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signals:
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void changed(const QImage &image);
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//! [2]
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protected:
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void timerEvent(QTimerEvent *e);
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private:
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void beginPainting();
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const QImage &endPainting();
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void scheduleChange();
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int m_changeTimerId;
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QImage m_image;
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QPainter m_painter;
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QPainterPath m_path;
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enum DirtyFlag {
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DirtyTransformationMatrix = 0x00001,
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DirtyClippingRegion = 0x00002,
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DirtyStrokeStyle = 0x00004,
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DirtyFillStyle = 0x00008,
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DirtyGlobalAlpha = 0x00010,
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DirtyLineWidth = 0x00020,
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DirtyLineCap = 0x00040,
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DirtyLineJoin = 0x00080,
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DirtyMiterLimit = 0x00100,
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MDirtyPen = DirtyStrokeStyle
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| DirtyLineWidth
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| DirtyLineCap
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| DirtyLineJoin
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| DirtyMiterLimit,
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DirtyShadowOffsetX = 0x00200,
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DirtyShadowOffsetY = 0x00400,
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DirtyShadowBlur = 0x00800,
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DirtyShadowColor = 0x01000,
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DirtyGlobalCompositeOperation = 0x2000,
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DirtyFont = 0x04000,
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DirtyTextAlign = 0x08000,
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DirtyTextBaseline = 0x10000,
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AllIsFullOfDirt = 0xfffff
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};
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struct State {
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State() : flags(0) {}
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QMatrix matrix;
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QPainterPath clipPath;
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QBrush strokeStyle;
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QBrush fillStyle;
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qreal globalAlpha;
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qreal lineWidth;
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Qt::PenCapStyle lineCap;
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Qt::PenJoinStyle lineJoin;
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qreal miterLimit;
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qreal shadowOffsetX;
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qreal shadowOffsetY;
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qreal shadowBlur;
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QColor shadowColor;
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QPainter::CompositionMode globalCompositeOperation;
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QFont font;
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int textAlign;
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int textBaseline;
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int flags;
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};
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State m_state;
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QStack<State> m_stateStack;
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};
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#endif
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