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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <QtGui/qoffscreensurface.h>
#include "qeglpbuffer_p.h"
#include "qeglconvenience_p.h"
QT_BEGIN_NAMESPACE
/*!
\class QEGLPbuffer
\brief A pbuffer-based implementation of QPlatformOffscreenSurface for EGL.
\since 5.2
\internal
\ingroup qpa
To use this implementation in the platform plugin simply
reimplement QPlatformIntegration::createPlatformOffscreenSurface()
and return a new instance of this class.
*/
QEGLPbuffer::QEGLPbuffer(EGLDisplay display, const QSurfaceFormat &format, QOffscreenSurface *offscreenSurface,
QEGLPlatformContext::Flags flags)
: QPlatformOffscreenSurface(offscreenSurface)
, m_format(format)
, m_display(display)
, m_pbuffer(EGL_NO_SURFACE)
{
m_hasSurfaceless = !flags.testFlag(QEGLPlatformContext::NoSurfaceless)
&& q_hasEglExtension(display, "EGL_KHR_surfaceless_context");
if (m_hasSurfaceless)
return;
EGLConfig config = q_configFromGLFormat(m_display, m_format, false, EGL_PBUFFER_BIT);
if (config) {
const EGLint attributes[] = {
EGL_WIDTH, offscreenSurface->size().width(),
EGL_HEIGHT, offscreenSurface->size().height(),
EGL_LARGEST_PBUFFER, EGL_FALSE,
EGL_NONE
};
m_pbuffer = eglCreatePbufferSurface(m_display, config, attributes);
if (m_pbuffer != EGL_NO_SURFACE)
m_format = q_glFormatFromConfig(m_display, config);
}
}
QEGLPbuffer::~QEGLPbuffer()
{
if (m_pbuffer != EGL_NO_SURFACE)
eglDestroySurface(m_display, m_pbuffer);
}
bool QEGLPbuffer::isValid() const
{
return m_pbuffer != EGL_NO_SURFACE || m_hasSurfaceless;
}
QT_END_NAMESPACE
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