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39
40#include "qeglfsoffscreenwindow_p.h"
41#include "qeglfshooks_p.h"
42#include <QtGui/QOffscreenSurface>
43#include <QtEglSupport/private/qeglconvenience_p.h>
44
45QT_BEGIN_NAMESPACE
46
47/*
48 In some cases pbuffers are not available. Triggering QtGui's built-in
49 fallback for a hidden QWindow is not suitable for eglfs since this would be
50 treated as an attempt to create multiple top-level, native windows.
51
52 Therefore this class is provided as an alternative to QEGLPbuffer.
53
54 This class requires the hooks to implement createNativeOffscreenWindow().
55*/
56
57QEglFSOffscreenWindow::QEglFSOffscreenWindow(EGLDisplay display, const QSurfaceFormat &format, QOffscreenSurface *offscreenSurface)
58 : QPlatformOffscreenSurface(offscreenSurface)
59 , m_format(format)
60 , m_display(display)
61 , m_surface(EGL_NO_SURFACE)
62 , m_window(0)
63{
64 m_window = qt_egl_device_integration()->createNativeOffscreenWindow(format);
65 if (!m_window) {
66 qWarning(msg: "QEglFSOffscreenWindow: Failed to create native window");
67 return;
68 }
69 EGLConfig config = q_configFromGLFormat(display: m_display, format: m_format);
70 m_surface = eglCreateWindowSurface(dpy: m_display, config, win: m_window, attrib_list: nullptr);
71 if (m_surface != EGL_NO_SURFACE)
72 m_format = q_glFormatFromConfig(display: m_display, config);
73}
74
75QEglFSOffscreenWindow::~QEglFSOffscreenWindow()
76{
77 if (m_surface != EGL_NO_SURFACE)
78 eglDestroySurface(dpy: m_display, surface: m_surface);
79 if (m_window)
80 qt_egl_device_integration()->destroyNativeWindow(window: m_window);
81}
82
83QT_END_NAMESPACE
84

source code of qtbase/src/plugins/platforms/eglfs/api/qeglfsoffscreenwindow.cpp