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39
40#include "qeglfsemulatorintegration.h"
41#include "qeglfsemulatorscreen.h"
42#include "private/qeglfsintegration_p.h"
43
44#include <private/qguiapplication_p.h>
45#include <QtEglSupport/private/qeglconvenience_p.h>
46#include <QtEglSupport/private/qeglplatformcontext_p.h>
47
48#include <qpa/qwindowsysteminterface.h>
49
50#include <QtCore/QJsonDocument>
51#include <QtCore/QJsonArray>
52#include <QtCore/QJsonParseError>
53
54QT_BEGIN_NAMESPACE
55
56QEglFSEmulatorIntegration::QEglFSEmulatorIntegration()
57{
58 // The Qt Emulator provides the ability to render to multiple displays
59 // In addition to the usual EGL and OpenGLESv2 API's, there are also a
60 // few additional API's that enable the client (this plugin) to query
61 // the available screens and their properties, as well as the ability
62 // to select which screen is the active render target (as this is
63 // usually handled in a platform specific way and not by EGL itself).
64
65 getDisplays = reinterpret_cast<PFNQGSGETDISPLAYSPROC>(eglGetProcAddress(procname: "qgsGetDisplays"));
66 setDisplay = reinterpret_cast<PFNQGSSETDISPLAYPROC>(eglGetProcAddress(procname: "qgsSetDisplay"));
67}
68
69void QEglFSEmulatorIntegration::platformInit()
70{
71}
72
73void QEglFSEmulatorIntegration::platformDestroy()
74{
75}
76
77bool QEglFSEmulatorIntegration::usesDefaultScreen()
78{
79 // This makes it possible to remotely query and then register our own set of screens
80 return false;
81}
82
83void QEglFSEmulatorIntegration::screenInit()
84{
85 // Use qgsGetDisplays() call to retrieve the available screens from the Emulator
86 if (getDisplays) {
87 QByteArray displaysInfo = getDisplays();
88 QJsonParseError error;
89 QJsonDocument displaysDocument = QJsonDocument::fromJson(json: displaysInfo, error: &error);
90 if (error.error == QJsonParseError::NoError) {
91 // Document should be an array of screen objects
92 if (displaysDocument.isArray()){
93 QJsonArray screenArray = displaysDocument.array();
94 for (auto screenValue : screenArray) {
95 if (screenValue.isObject())
96 QWindowSystemInterface::handleScreenAdded(screen: new QEglFSEmulatorScreen(screenValue.toObject()));
97 }
98 }
99 } else {
100 qWarning() << "eglfs_emu: Failed to parse display info JSON with error: " << error.errorString()
101 << " at offset " << error.offset << " : " << displaysInfo;
102
103 }
104 } else {
105 qFatal(msg: "EGL library doesn't support Emulator extensions");
106 }
107}
108
109bool QEglFSEmulatorIntegration::hasCapability(QPlatformIntegration::Capability cap) const
110{
111 switch (cap) {
112 case QPlatformIntegration::ThreadedPixmaps:
113 case QPlatformIntegration::OpenGL:
114 case QPlatformIntegration::ThreadedOpenGL:
115 return true;
116 default:
117 return false;
118 }
119}
120
121EGLNativeWindowType QEglFSEmulatorIntegration::createNativeWindow(QPlatformWindow *platformWindow,
122 const QSize &size,
123 const QSurfaceFormat &format)
124{
125 Q_UNUSED(size);
126 Q_UNUSED(format);
127 QEglFSEmulatorScreen *screen = static_cast<QEglFSEmulatorScreen *>(platformWindow->screen());
128 if (screen && setDisplay) {
129 // Let the emulator know which screen the window surface is attached to
130 setDisplay(screen->id());
131 }
132 static QBasicAtomicInt uniqueWindowId = Q_BASIC_ATOMIC_INITIALIZER(0);
133 return EGLNativeWindowType(qintptr(1 + uniqueWindowId.fetchAndAddRelaxed(valueToAdd: 1)));
134}
135
136QT_END_NAMESPACE
137

source code of qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_emu/qeglfsemulatorintegration.cpp