Android: Enable Adoption of ANativeWindow handle as a QOffscreenSurface

This is done by adding an API to QOffscreenSurface to enable setting a
native handle which can represent a native offscreen surface.  When
using the TexureView it is necessary to render to SurfaceTexture objects
which are exposed as offscreen window surfaces.  After wraping a
SurfaceTexture in a android.view.Surface object and passing it to C++
via the JNI, it is possible to get the needed ANativeWindow* handle
required to pass to eglCreateWindowSurface. So by setting this native
handle Qt can then render to this "native" offscreen surface.

Change-Id: If7fc5ac7ac588fe6c3a6fb883ea7e439d095470f
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/src/plugins/platforms/android/qandroidplatformoffscreensurface.h b/src/plugins/platforms/android/qandroidplatformoffscreensurface.h
new file mode 100644
index 0000000000..461f949254
--- /dev/null
+++ b/src/plugins/platforms/android/qandroidplatformoffscreensurface.h
@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
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+** 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
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+** information to ensure the GNU General Public License requirements will
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+****************************************************************************/
+
+#ifndef QANDROIDPLATFORMOFFSCREENSURFACETEXTURE_H
+#define QANDROIDPLATFORMOFFSCREENSURFACETEXTURE_H
+
+#include <qpa/qplatformoffscreensurface.h>
+#include <QtEglSupport/private/qeglplatformcontext_p.h>
+
+QT_BEGIN_NAMESPACE
+class QOffscreenSurface;
+class QAndroidPlatformOffscreenSurface : public QPlatformOffscreenSurface
+{
+public:
+    QAndroidPlatformOffscreenSurface(EGLDisplay display, const QSurfaceFormat &format,
+                                            QOffscreenSurface *offscreenSurface);
+    ~QAndroidPlatformOffscreenSurface();
+
+    QSurfaceFormat format() const override { return m_format; }
+    bool isValid() const override { return m_surface != EGL_NO_SURFACE; }
+
+    EGLSurface surface() const { return m_surface; }
+private:
+    QSurfaceFormat m_format;
+    EGLDisplay m_display;
+    EGLSurface m_surface;
+};
+
+QT_END_NAMESPACE
+
+#endif // QANDROIDPLATFORMOFFSCREENSURFACETEXTURE_H