#include "qquickcontext2d_p.h"
#include "qquickcontext2dcommandbuffer_p.h"
#include "qquickcanvasitem_p.h"
#include <private/qtquickglobal_p.h>
#include <private/qquickcontext2dtexture_p.h>
#include <private/qquickitem_p.h>
#include <qsgrendererinterface.h>
#include <QtQuick/private/qsgcontext_p.h>
#include <private/qquicksvgparser_p.h>
#include <private/qquickimage_p_p.h>
#include <qqmlinfo.h>
#include <qqmlengine.h>
#include <private/qv4domerrors_p.h>
#include <private/qv4engine_p.h>
#include <private/qv4object_p.h>
#include <private/qv4qobjectwrapper_p.h>
#include <private/qquickwindow_p.h>
#include <private/qv4value_p.h>
#include <private/qv4functionobject_p.h>
#include <private/qv4objectproto_p.h>
#include <private/qv4scopedvalue_p.h>
#include <private/qlocale_tools_p.h>
#include <QtCore/qmath.h>
#include <QtCore/qvector.h>
#include <QtCore/private/qnumeric_p.h>
#include <QtCore/QRunnable>
#include <QtGui/qguiapplication.h>
#include <private/qguiapplication_p.h>
#include <qpa/qplatformintegration.h>
#include <private/qsgdefaultrendercontext_p.h>
#include <cmath>
#include "moc_qquickcontext2d_p.cpp"

Include dependency graph for qquickcontext2d.cpp:

Classes
class	QQuickContext2DEngineData

struct	QV4::Heap::QQuickJSContext2D

struct	QV4::Heap::QQuickJSContext2DPrototype

struct	QV4::Heap::QQuickContext2DStyle

struct	QV4::Heap::QQuickJSContext2DPixelData

struct	QV4::Heap::QQuickJSContext2DImageData

struct	QQuickJSContext2D

struct	QQuickJSContext2DPrototype

struct	QQuickContext2DStyle

struct	QQuickJSContext2DPixelData

struct	QQuickJSContext2DImageData

Namespaces
namespace	QV4
	\qmltype Particle \inqmlmodule QtQuick.Particles

namespace	QV4::Heap

Macros
#define	CHECK_CONTEXT(r)
	\qmltype Context2D \instantiates QQuickContext2D \inqmlmodule QtQuick

#define	CHECK_CONTEXT_SETTER(r)

#define	qClamp(val, min, max) qMin(qMax(val, min), max)

#define	CHECK_RGBA(c) (c == '-' \|\| c == '.' \|\| (c >=0 && c <= 9))

#define	Q_TRY_SET_TOKEN(token, value, setStatement)

Enumerations
enum	FontToken { NoTokens = 0x00 , FontStyle = 0x01 , FontVariant = 0x02 , FontWeight = 0x04 }

Functions
Q_QUICK_PRIVATE_EXPORT QColor	qt_color_from_string (const QV4::Value &name)

static int	qParseFontSizeFromToken (QStringView fontSizeToken, bool &ok)

static bool	qSetFontSizeFromToken (QFont &font, QStringView fontSizeToken)

static QStringList	qExtractFontFamiliesFromString (QStringView fontFamiliesString)

static bool	qSetFontFamilyFromTokens (QFont &font, const QStringList &fontFamilyTokens)

static QFont	qt_font_from_string (const QString &fontString, const QFont &currentFont)

	DEFINE_OBJECT_VTABLE (QQuickJSContext2D)

	DEFINE_OBJECT_VTABLE (QQuickJSContext2DPrototype)

	DEFINE_OBJECT_VTABLE (QQuickContext2DStyle)

QImage	qt_image_convolute_filter (const QImage &src, const QVector< qreal > &weights, int radius=0)

void	qt_image_boxblur (QImage &image, int radius, bool quality)

static QPainter::CompositionMode	qt_composite_mode_from_string (const QString &compositeOperator)

static QString	qt_composite_mode_to_string (QPainter::CompositionMode op)

	DEFINE_OBJECT_VTABLE (QQuickJSContext2DPixelData)

	DEFINE_OBJECT_VTABLE (QQuickJSContext2DImageData)

static QV4::ReturnedValue	qt_create_image_data (qreal w, qreal h, QV4::ExecutionEngine *v4, const QImage &image)

int	baseLineOffset (QQuickContext2D::TextBaseLineType value, const QFontMetrics &metrics)

static int	textAlignOffset (QQuickContext2D::TextAlignType value, const QFontMetrics &metrics, const QString &text)

static bool	areCollinear (const QPointF &a, const QPointF &b, const QPointF &c)

static bool	withinRange (qreal p, qreal a, qreal b)

Macro Definition Documentation

◆ CHECK_CONTEXT

#define CHECK_CONTEXT ( r )

Value:

if (!r || !r->d()->context() || !r->d()->context()->bufferValid()) \

THROW_GENERIC_ERROR("Not a Context2D object");

r

GLboolean r

[2]

Definition qopengles2ext.h:337

\qmltype Context2D \instantiates QQuickContext2D \inqmlmodule QtQuick

Since: 5.0

Provides 2D context for shapes on a Canvas item.

The Context2D object can be created by Canvas item's getContext() method:

Canvas {
  id:canvas
  onPaint:{
     var ctx = canvas.getContext('2d');
     //...
  }
}

The Context2D API implements the same \l {http://www.w3.org/TR/2dcontext}{W3C Canvas 2D Context API standard} with some enhanced features.

The Context2D API provides the rendering {context} which defines the methods and attributes needed to draw on the Canvas item. The following assigns the canvas rendering context to a {context} variable:

var context = mycanvas.getContext("2d")

context

static void * context

Definition qandroidaudiosource.cpp:42

The Context2D API renders the canvas as a coordinate system whose origin (0,0) is at the top left corner, as shown in the figure below. Coordinates increase along the {x} axis from left to right and along the {y} axis from top to bottom of the canvas.

Definition at line 92 of file qquickcontext2d.cpp.

◆ CHECK_CONTEXT_SETTER

#define CHECK_CONTEXT_SETTER ( r )

Value:

if (!r || !r->d()->context() || !r->d()->context()->bufferValid()) \

THROW_GENERIC_ERROR("Not a Context2D object");

Definition at line 95 of file qquickcontext2d.cpp.

◆ CHECK_RGBA

#define CHECK_RGBA ( c ) (c == '-' || c == '.' || (c >=0 && c <= 9))

Definition at line 98 of file qquickcontext2d.cpp.

◆ Q_TRY_SET_TOKEN

#define Q_TRY_SET_TOKEN	(	token,
		value,
		setStatement
	)

Value:

if (!(usedTokens & token)) { \
    usedTokens |= token; \
    setStatement; \
} else { \
    qWarning().nospace() << "Context2D: Duplicate token " << QLatin1String(value) << " found in font string."; \
    return currentFont; \
}