Add wip-cpp-compositor to manual tests

This is an example similar to minimal-cpp, but for xdg-shell instead of
ivi-application. Eventually it should replace qwindow-compositor as the
main c++-only example compositor.

Task-number: QTBUG-69937
Change-Id: Icac70e4af8f97c5f628d7e30279249210772a1c1
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

1 files changed, 145 insertions, 0 deletions

diff --git a/tests/manual/wip-cpp-compositor/window.cpp b/tests/manual/wip-cpp-compositor/window.cpp
new file mode 100644
index 00000000..b5b2581e
--- /dev/null
+++ b/tests/manual/wip-cpp-compositor/window.cpp
@@ -0,0 +1,145 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Wayland module
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "window.h"
+#include "compositor.h"
+
+#include <QPainter>
+#include <QMatrix4x4>
+#include <QOpenGLFunctions>
+#include <QOpenGLTexture>
+#include <QMouseEvent>
+
+Window::Window(Compositor *compositor)
+    : m_compositor(compositor)
+    , m_output(new QWaylandOutput(compositor, this))
+{
+    m_output->setSizeFollowsWindow(true);
+}
+
+void Window::initializeGL()
+{
+    m_textureBlitter.create();
+    m_compositor->handleGlInitialized();
+}
+
+void Window::paintGL()
+{
+    m_output->frameStarted();
+
+    QOpenGLFunctions *functions = context()->functions();
+    functions->glClearColor(.4f, .7f, .1f, 0.5f);
+    functions->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    GLenum currentTarget = GL_TEXTURE_2D;
+    m_textureBlitter.bind(currentTarget);
+    functions->glEnable(GL_BLEND);
+    functions->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    const auto views = m_compositor->views();
+
+    for (View *view : views) {
+        auto *texture = view->getTexture();
+        if (!texture)
+            continue;
+        if (texture->target() != currentTarget) {
+            currentTarget = texture->target();
+            m_textureBlitter.bind(currentTarget);
+        }
+        GLuint textureId = texture->textureId();
+
+        // Anchored position needs to be updated immediately before rendering or
+        // position and size might get out of sync.
+        view->updateAnchoredPosition();
+
+        QWaylandSurface *surface = view->surface();
+        if (surface && surface->hasContent()) {
+            QOpenGLTextureBlitter::Origin surfaceOrigin =
+                    view->currentBuffer().origin() == QWaylandSurface::OriginTopLeft
+                    ? QOpenGLTextureBlitter::OriginTopLeft
+                    : QOpenGLTextureBlitter::OriginBottomLeft;
+            QMatrix4x4 targetTransform = QOpenGLTextureBlitter::targetTransform(view->globalGeometry(), QRect(QPoint(), size()));
+            m_textureBlitter.blit(textureId, targetTransform, surfaceOrigin);
+        }
+    }
+    m_textureBlitter.release();
+
+    m_output->sendFrameCallbacks();
+}
+
+void Window::mousePressEvent(QMouseEvent *event)
+{
+    m_compositor->handleMousePress(event->localPos().toPoint(), event->button());
+}
+
+void Window::mouseReleaseEvent(QMouseEvent *event)
+{
+    m_compositor->handleMouseRelease(event->localPos().toPoint(), event->button(), event->buttons());
+}
+
+void Window::mouseMoveEvent(QMouseEvent *event)
+{
+    m_compositor->handleMouseMove(event->localPos().toPoint());
+}
+
+void Window::wheelEvent(QWheelEvent *event)
+{
+    m_compositor->handleMouseWheel(event->orientation(), event->delta());
+}
+
+void Window::keyPressEvent(QKeyEvent *event)
+{
+    m_compositor->handleKeyPress(event->nativeScanCode());
+}
+
+void Window::keyReleaseEvent(QKeyEvent *event)
+{
+    m_compositor->handleKeyRelease(event->nativeScanCode());
+}