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50
51#include "softwarerenderer.h"
52#include <QQuickItem>
53#include <QQuickWindow>
54#include <QSGRendererInterface>
55#include <QPainter>
56#include <QPainterPath>
57
58SoftwareRenderNode::~SoftwareRenderNode()
59{
60 releaseResources();
61}
62
63void SoftwareRenderNode::releaseResources()
64{
65}
66
67void SoftwareRenderNode::render(const RenderState *renderState)
68{
69 Q_ASSERT(m_window);
70
71 QSGRendererInterface *rif = m_window->rendererInterface();
72 QPainter *p = static_cast<QPainter *>(rif->getResource(window: m_window, resource: QSGRendererInterface::PainterResource));
73 Q_ASSERT(p);
74
75 const QRegion *clipRegion = renderState->clipRegion();
76 if (clipRegion && !clipRegion->isEmpty())
77 p->setClipRegion(*clipRegion, op: Qt::ReplaceClip); // must be done before setTransform
78
79 p->setTransform(transform: matrix()->toTransform());
80 p->setOpacity(inheritedOpacity());
81
82 const QPointF p0(m_width - 1, m_height - 1);
83 const QPointF p1(0, 0);
84 const QPointF p2(0, m_height - 1);
85 QPainterPath path(p0);
86 path.lineTo(p: p1);
87 path.lineTo(p: p2);
88 path.closeSubpath();
89
90 QLinearGradient gradient(QPointF(0, 0), QPointF(m_width, m_height));
91 gradient.setColorAt(pos: 0, color: Qt::green);
92 gradient.setColorAt(pos: 1, color: Qt::red);
93
94 p->fillPath(path, brush: gradient);
95}
96
97QSGRenderNode::StateFlags SoftwareRenderNode::changedStates() const
98{
99 return {};
100}
101
102QSGRenderNode::RenderingFlags SoftwareRenderNode::flags() const
103{
104 return BoundedRectRendering;
105}
106
107QRectF SoftwareRenderNode::rect() const
108{
109 return QRect(0, 0, m_width, m_height);
110}
111
112void SoftwareRenderNode::sync(QQuickItem *item)
113{
114 m_window = item->window();
115 m_width = item->width();
116 m_height = item->height();
117}
118

source code of qtdeclarative/examples/quick/scenegraph/rendernode/softwarerenderer.cpp