Move eglconvenience to QtGui

Task-number: QTBUG-83255
Change-Id: I8a008d8906308dd73a0793db5b88d3a1b6fdaf5c
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 145 insertions, 0 deletions

diff --git a/src/gui/opengl/platform/egl/qeglplatformcontext_p.h b/src/gui/opengl/platform/egl/qeglplatformcontext_p.h
new file mode 100644
index 0000000000..899f4b5c9f
--- /dev/null
+++ b/src/gui/opengl/platform/egl/qeglplatformcontext_p.h
@@ -0,0 +1,145 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QEGLPLATFORMCONTEXT_H
+#define QEGLPLATFORMCONTEXT_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qtextstream.h>
+#include <qpa/qplatformwindow.h>
+#include <qpa/qplatformopenglcontext.h>
+#include <QtCore/qvariant.h>
+#include <QtGui/private/qt_egl_p.h>
+#include <QtGui/private/qopenglcontext_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_GUI_EXPORT QEGLPlatformContext : public QPlatformOpenGLContext,
+                                            public QPlatformInterface::QEGLContext
+{
+public:
+    enum Flag {
+        NoSurfaceless = 0x01
+    };
+    Q_DECLARE_FLAGS(Flags, Flag)
+
+    QEGLPlatformContext(const QSurfaceFormat &format, QPlatformOpenGLContext *share, EGLDisplay display,
+                        EGLConfig *config = nullptr, Flags flags = { });
+
+    template <typename T>
+    static QOpenGLContext *createFrom(EGLContext context, EGLDisplay contextDisplay,
+            EGLDisplay platformDisplay, QOpenGLContext *shareContext)
+    {
+        if (!context)
+            return nullptr;
+
+        // A context belonging to a given EGLDisplay cannot be used with another one
+        if (contextDisplay != platformDisplay) {
+            qWarning("QEGLPlatformContext: Cannot adopt context from different display");
+            return nullptr;
+        }
+
+        QPlatformOpenGLContext *shareHandle = shareContext ? shareContext->handle() : nullptr;
+
+        auto *resultingContext = new QOpenGLContext;
+        auto *contextPrivate = QOpenGLContextPrivate::get(resultingContext);
+        auto *platformContext = new T;
+        platformContext->adopt(context, contextDisplay, shareHandle);
+        contextPrivate->adopt(platformContext);
+        return resultingContext;
+    }
+
+    ~QEGLPlatformContext();
+
+    void initialize() override;
+    bool makeCurrent(QPlatformSurface *surface) override;
+    void doneCurrent() override;
+    void swapBuffers(QPlatformSurface *surface) override;
+    QFunctionPointer getProcAddress(const char *procName) override;
+
+    QSurfaceFormat format() const override;
+    bool isSharing() const override { return m_shareContext != EGL_NO_CONTEXT; }
+    bool isValid() const override { return m_eglContext != EGL_NO_CONTEXT; }
+
+    EGLContext nativeContext() const override { return eglContext(); }
+
+    EGLContext eglContext() const;
+    EGLDisplay eglDisplay() const;
+    EGLConfig eglConfig() const;
+
+protected:
+    QEGLPlatformContext() {} // For adoption
+    virtual EGLSurface eglSurfaceForPlatformSurface(QPlatformSurface *surface) = 0;
+    virtual EGLSurface createTemporaryOffscreenSurface();
+    virtual void destroyTemporaryOffscreenSurface(EGLSurface surface);
+    virtual void runGLChecks();
+
+private:
+    void adopt(EGLContext context, EGLDisplay display, QPlatformOpenGLContext *shareContext);
+    void updateFormatFromGL();
+
+    EGLContext m_eglContext;
+    EGLContext m_shareContext;
+    EGLDisplay m_eglDisplay;
+    EGLConfig m_eglConfig;
+    QSurfaceFormat m_format;
+    EGLenum m_api;
+    int m_swapInterval = -1;
+    bool m_swapIntervalEnvChecked = false;
+    int m_swapIntervalFromEnv = -1;
+    Flags m_flags;
+    bool m_ownsContext = false;
+    QList<EGLint> m_contextAttrs;
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(QEGLPlatformContext::Flags)
+
+QT_END_NAMESPACE
+
+#endif //QEGLPLATFORMCONTEXT_H