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39
40#ifndef QQUICKCANVASCONTEXT_P_H
41#define QQUICKCANVASCONTEXT_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <private/qtquickglobal_p.h>
55
56QT_REQUIRE_CONFIG(quick_canvas);
57
58#include <QtQuick/qquickitem.h>
59#include <QtQml/private/qv4value_p.h>
60
61QT_BEGIN_NAMESPACE
62
63class QQuickCanvasItem;
64class QSGLayer;
65
66class QQuickCanvasContextPrivate;
67class QQuickCanvasContext : public QObject
68{
69 Q_OBJECT
70
71public:
72 QQuickCanvasContext(QObject *parent = nullptr);
73 ~QQuickCanvasContext();
74
75 virtual QStringList contextNames() const = 0;
76
77 // Init (ignore options if necessary)
78 virtual void init(QQuickCanvasItem *canvasItem, const QVariantMap &args) = 0;
79
80 virtual void prepare(const QSize& canvasSize, const QSize& tileSize, const QRect& canvasWindow, const QRect& dirtyRect, bool smooth, bool antialiasing);
81 virtual void flush();
82
83 virtual QV4::ExecutionEngine *v4Engine() const = 0;
84 virtual void setV4Engine(QV4::ExecutionEngine *engine) = 0;
85 virtual QV4::ReturnedValue v4value() const = 0;
86
87 virtual QImage toImage(const QRectF& bounds) = 0;
88
89Q_SIGNALS:
90 void textureChanged();
91};
92
93QT_END_NAMESPACE
94
95#endif //QQUICKCANVASCONTEXT_P_H
96

source code of qtdeclarative/src/quick/items/context2d/qquickcanvascontext_p.h