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50
51#include "customrenderitem.h"
52#include <QQuickWindow>
53#include <QSGRendererInterface>
54
55#include "openglrenderer.h"
56#ifdef Q_OS_MACOS
57#include "metalrenderer.h"
58#endif
59#if QT_CONFIG(d3d12)
60#include "d3d12renderer.h"
61#endif
62#include "softwarerenderer.h"
63
64//! [1]
65CustomRenderItem::CustomRenderItem(QQuickItem *parent)
66 : QQuickItem(parent)
67{
68 // Our item shows something so set the flag.
69 setFlag(flag: ItemHasContents);
70}
71//! [1]
72
73//! [2]
74QSGNode *CustomRenderItem::updatePaintNode(QSGNode *node, UpdatePaintNodeData *)
75{
76 QSGRenderNode *n = static_cast<QSGRenderNode *>(node);
77
78 QSGRendererInterface *ri = window()->rendererInterface();
79 if (!ri)
80 return nullptr;
81
82 switch (ri->graphicsApi()) {
83 case QSGRendererInterface::OpenGL:
84 Q_FALLTHROUGH();
85 case QSGRendererInterface::OpenGLRhi:
86#if QT_CONFIG(opengl)
87 if (!n)
88 n = new OpenGLRenderNode;
89 static_cast<OpenGLRenderNode *>(n)->sync(item: this);
90#endif
91 break;
92
93 case QSGRendererInterface::MetalRhi:
94// Restore when QTBUG-78580 is done and the .pro is updated accordingly
95//#ifdef Q_OS_DARWIN
96#ifdef Q_OS_MACOS
97 if (!n) {
98 MetalRenderNode *metalNode = new MetalRenderNode;
99 n = metalNode;
100 metalNode->resourceBuilder()->setWindow(window());
101 QObject::connect(window(), &QQuickWindow::beforeRendering,
102 metalNode->resourceBuilder(), &MetalRenderNodeResourceBuilder::build);
103 }
104 static_cast<MetalRenderNode *>(n)->sync(this);
105#endif
106 break;
107
108 case QSGRendererInterface::Direct3D12: // ### Qt 6: remove
109#if QT_CONFIG(d3d12)
110 if (!n)
111 n = new D3D12RenderNode;
112 static_cast<D3D12RenderNode *>(n)->sync(this);
113#endif
114 break;
115
116 case QSGRendererInterface::Software:
117 if (!n)
118 n = new SoftwareRenderNode;
119 static_cast<SoftwareRenderNode *>(n)->sync(item: this);
120 break;
121
122 default:
123 break;
124 }
125
126 if (!n)
127 qWarning(msg: "QSGRendererInterface reports unknown graphics API %d", ri->graphicsApi());
128
129 return n;
130}
131//! [2]
132
133// This item does not support being moved between windows. If that is desired,
134// itemChange() should be reimplemented as well.
135

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