1 files changed, 143 insertions, 0 deletions
diff --git a/src/plugins/platforms/wasm/qwasmscreen.cpp b/src/plugins/platforms/wasm/qwasmscreen.cpp
new file mode 100644
index 00000000000..8667191033a
--- /dev/null
+++ b/src/plugins/platforms/wasm/qwasmscreen.cpp
@@ -0,0 +1,143 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) 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.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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwasmscreen.h"
+#include "qwasmwindow.h"
+#include "qwasmcompositor.h"
+
+#include <QtEglSupport/private/qeglconvenience_p.h>
+#ifndef QT_NO_OPENGL
+# include <QtEglSupport/private/qeglplatformcontext_p.h>
+#endif
+#include <qpa/qwindowsysteminterface.h>
+#include <QtCore/QCoreApplication>
+#include <QDebug>
+#include <QGuiApplication>
+#include <private/qhighdpiscaling_p.h>
+
+
+QT_BEGIN_NAMESPACE
+
+QWasmScreen::QWasmScreen(QWasmCompositor *compositor)
+    : mCompositor(compositor)
+    , m_depth(32)
+    , m_format(QImage::Format_RGB32)
+{
+    mCompositor->setScreen(this);
+}
+
+QWasmScreen::~QWasmScreen()
+{
+
+}
+
+QRect QWasmScreen::geometry() const
+{
+    return m_geometry;
+}
+
+int QWasmScreen::depth() const
+{
+    return m_depth;
+}
+
+QImage::Format QWasmScreen::format() const
+{
+    return m_format;
+}
+
+qreal QWasmScreen::devicePixelRatio() const
+{
+    // FIXME: The effective device pixel ratio may be different from the
+    // HTML window dpr if the OpenGL driver/GPU allocates a less than
+    // full resolution surface. Use emscripten_webgl_get_drawing_buffer_size()
+    // and compute the dpr instead.
+    double htmlWindowDpr = EM_ASM_DOUBLE({
+        return window.devicePixelRatio;
+    });
+    return qreal(htmlWindowDpr);
+}
+
+QPlatformCursor *QWasmScreen::cursor() const
+{
+    return const_cast<QWasmCursor *>(&m_cursor);
+}
+
+void QWasmScreen::resizeMaximizedWindows()
+{
+    QList<QWindow*> windows = QGuiApplication::allWindows();
+    // 'screen()' still has the old geometry info while 'this' has the new geometry info
+    const QRect oldGeometry = screen()->geometry();
+    const QRect oldAvailableGeometry = screen()->availableGeometry();
+
+    const QRect newGeometry = deviceIndependentGeometry();
+    const QRect newAvailableGeometry = QHighDpi::fromNative(availableGeometry(), QHighDpiScaling::factor(this), newGeometry.topLeft());
+
+    // make sure maximized and fullscreen windows are updated
+    for (int i = 0; i < windows.size(); ++i) {
+        QWindow *w = windows.at(i);
+
+        // Skip non-platform windows, e.g., offscreen windows.
+        if (!w->handle())
+            continue;
+
+        if (platformScreenForWindow(w) != this)
+            continue;
+
+        if (w->windowState() & Qt::WindowMaximized || w->geometry() == oldAvailableGeometry)
+            w->setGeometry(newAvailableGeometry);
+
+        else if (w->windowState() & Qt::WindowFullScreen || w->geometry() == oldGeometry)
+            w->setGeometry(newGeometry);
+    }
+}
+
+QWindow *QWasmScreen::topWindow() const
+{
+    return mCompositor->keyWindow();
+}
+
+QWindow *QWasmScreen::topLevelAt(const QPoint & p) const
+{
+    return mCompositor->windowAt(p);
+}
+
+void QWasmScreen::invalidateSize()
+{
+    m_geometry = QRect();
+}
+
+void QWasmScreen::setGeometry(const QRect &rect)
+{
+    m_geometry = rect;
+    QWindowSystemInterface::handleScreenGeometryChange(QPlatformScreen::screen(), geometry(), availableGeometry());
+    resizeMaximizedWindows();
+}
+
+QT_END_NAMESPACE