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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQUICKCONTEXT2D_P_H
#define QQUICKCONTEXT2D_P_H
#include <QtQuick/qtquickglobal.h>
#include <QtDeclarative/qdeclarative.h>
#include <QtDeclarative/qdeclarativecomponent.h>
#include <private/qquickcanvascontext_p.h>
#include <private/qquickcanvasitem_p.h>
#include <QtGui/qpainter.h>
#include <QtGui/qpainterpath.h>
#include <QtCore/qstring.h>
#include <QtCore/qstack.h>
#include <private/qv8engine_p.h>
#define QQUICKCONTEXT2D_DEBUG //enable this for just DEBUG purpose!
#ifdef QQUICKCONTEXT2D_DEBUG
#include <QElapsedTimer>
#endif
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QQuickContext2DCommandBuffer;
class QQuickContext2DTexture;
class QDeclarativePixmap;
class QSGTexture;
class QLockedCommandBuffer {
public:
QLockedCommandBuffer(QQuickContext2DCommandBuffer *b);
~QLockedCommandBuffer();
QQuickContext2DCommandBuffer* operator->() const;
private:
QQuickContext2DCommandBuffer *m_buffer;
};
class Q_QUICK_EXPORT QQuickContext2D : public QQuickCanvasContext
{
public:
enum TextBaseLineType { Alphabetic=0, Top, Middle, Bottom, Hanging};
enum TextAlignType { Start=0, End, Left, Right, Center};
enum PaintCommand {
Invalid = 0,
UpdateMatrix,
ClearRect,
FillRect,
StrokeRect,
Fill,
Stroke,
Clip,
UpdateBrush,
GlobalAlpha,
GlobalCompositeOperation,
StrokeStyle,
FillStyle,
LineWidth,
LineCap,
LineJoin,
MiterLimit,
ShadowOffsetX,
ShadowOffsetY,
ShadowBlur,
ShadowColor,
Font,
TextBaseline,
TextAlign,
FillText,
StrokeText,
DrawImage,
GetImageData
};
enum ImageFilterMode {
Threshold,
Mono,
GrayScale,
Brightness,
Invert,
Blur,
Opaque,
Convolute
};
struct State {
State()
: strokeStyle(QColor("#000000"))
, fillStyle(QColor("#000000"))
, fillPatternRepeatX(false)
, fillPatternRepeatY(false)
, strokePatternRepeatX(false)
, strokePatternRepeatY(false)
, fillRule(Qt::WindingFill)
, globalAlpha(1.0)
, lineWidth(1)
, lineCap(Qt::FlatCap)
, lineJoin(Qt::MiterJoin)
, miterLimit(10)
, shadowOffsetX(0)
, shadowOffsetY(0)
, shadowBlur(0)
, shadowColor(qRgba(0, 0, 0, 0))
, globalCompositeOperation(QPainter::CompositionMode_SourceOver)
, font(QFont(QLatin1String("sans-serif"), 10))
, textAlign(QQuickContext2D::Start)
, textBaseline(QQuickContext2D::Alphabetic)
{
}
QTransform matrix;
QPainterPath clipPath;
QBrush strokeStyle;
QBrush fillStyle;
bool fillPatternRepeatX:1;
bool fillPatternRepeatY:1;
bool strokePatternRepeatX:1;
bool strokePatternRepeatY:1;
Qt::FillRule fillRule;
qreal globalAlpha;
qreal lineWidth;
Qt::PenCapStyle lineCap;
Qt::PenJoinStyle lineJoin;
qreal miterLimit;
qreal shadowOffsetX;
qreal shadowOffsetY;
qreal shadowBlur;
QColor shadowColor;
QPainter::CompositionMode globalCompositeOperation;
QFont font;
QQuickContext2D::TextAlignType textAlign;
QQuickContext2D::TextBaseLineType textBaseline;
};
QQuickContext2D(QObject *parent = 0);
~QQuickContext2D();
QStringList contextNames() const;
void init(QQuickCanvasItem *canvasItem, const QVariantMap &args);
void prepare(const QSize& canvasSize, const QSize& tileSize, const QRect& canvasWindow, const QRect& dirtyRect, bool smooth);
void flush();
void sync();
QSGDynamicTexture *texture() const;
QImage toImage(const QRectF& bounds);
v8::Handle<v8::Object> v8value() const;
void setV8Engine(QV8Engine *eng);
QQuickCanvasItem* canvas() const { return m_canvas; }
QLockedCommandBuffer buffer() const { return m_buffer; }
bool bufferValid() const { return m_buffer != 0; }
void popState();
void pushState();
void reset();
// path API
void beginPath();
void closePath();
void moveTo(qreal x, qreal y);
void lineTo(qreal x, qreal y);
void quadraticCurveTo(qreal cpx, qreal cpy, qreal x, qreal y);
void bezierCurveTo(qreal cp1x, qreal cp1y,
qreal cp2x, qreal cp2y, qreal x, qreal y);
void arcTo(qreal x1, qreal y1, qreal x2, qreal y2, qreal radius);
void rect(qreal x, qreal y, qreal w, qreal h);
void roundedRect(qreal x, qreal y,qreal w, qreal h, qreal xr, qreal yr);
void ellipse(qreal x, qreal y,qreal w, qreal h);
void text(const QString& str, qreal x, qreal y);
void arc(qreal x, qreal y, qreal radius,
qreal startAngle, qreal endAngle,
bool anticlockwise, bool transform=true);
void addArcTo(const QPointF& p1, const QPointF& p2, float radius);
bool isPointInPath(qreal x, qreal y) const;
QPainterPath createTextGlyphs(qreal x, qreal y, const QString& text);
QImage createImage(const QUrl& url);
State state;
QStack<QQuickContext2D::State> m_stateStack;
QQuickCanvasItem* m_canvas;
QQuickContext2DCommandBuffer* m_buffer;
QPainterPath m_path;
v8::Local<v8::Value> m_fillStyle;
v8::Local<v8::Value> m_strokeStyle;
v8::Handle<v8::Value> m_v8path;
QV8Engine *m_v8engine;
v8::Persistent<v8::Object> m_v8value;
QQuickContext2DTexture *m_texture;
QQuickCanvasItem::RenderTarget m_renderTarget;
QQuickCanvasItem::RenderStrategy m_renderStrategy;
};
QT_END_NAMESPACE
QML_DECLARE_TYPE(QQuickContext2D)
QT_END_HEADER
#endif // QQUICKCONTEXT2D_P_H
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