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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QGuiApplication>
#include <QtGui/private/qguiapplication_p.h>
#include <QOpenGLWindow>
#include <QOpenGLTexture>
#include <QOpenGLTextureBlitter>
#include <QPainter>
#include <QMouseEvent>
#include <QPlatformSurfaceEvent>
#include <QtWaylandClient/private/qwaylanddisplay_p.h>
#include <QtWaylandClient/private/qwaylandintegration_p.h>
#include <QtWaylandClient/private/qwaylandserverbufferintegration_p.h>
#include "texturesharingextension.h"
#include <QDebug>
#include <QtGui/qpa/qplatformnativeinterface.h>
#include <QTimer>
#include <QMap>
class TestWindow : public QOpenGLWindow
{
Q_OBJECT
public:
TestWindow()
: m_extension(nullptr)
{
m_extension = new TextureSharingExtension;
connect(m_extension, SIGNAL(bufferReceived(QtWaylandClient::QWaylandServerBuffer*, const QString&)), this, SLOT(receiveBuffer(QtWaylandClient::QWaylandServerBuffer*, const QString&)));
connect(m_extension, &TextureSharingExtension::activeChanged, this, &TestWindow::handleExtensionActive);
}
public slots:
void receiveBuffer(QtWaylandClient::QWaylandServerBuffer *buffer, const QString &key)
{
if (!buffer) {
qWarning() << "Could not find image with key" << key;
return;
}
m_buffers.insert(key, buffer);
update();
}
void handleExtensionActive()
{
if (m_extension->isActive())
getImage("qt_logo");
}
protected:
void mousePressEvent(QMouseEvent *ev) override {
QRect rect(10, height() - 10 - 50, 50, 50);
bool rectPressed = rect.contains(ev->pos());
static int c;
if (rectPressed && ev->button() == Qt::LeftButton)
getImage(QString("unreasonably large image %1").arg(c++));
else if (ev->button() == Qt::RightButton)
getImage("guitar.jpg");
else if (ev->button() == Qt::MiddleButton)
unloadImageAt(ev->pos());
}
void initializeGL() override
{
m_blitter = new QOpenGLTextureBlitter;
m_blitter->create();
}
void paintGL() override {
glClearColor(.5, .45, .42, 1.);
glClear(GL_COLOR_BUFFER_BIT);
// draw a "button" to click in
glScissor(10,10,50,50);
glEnable(GL_SCISSOR_TEST);
glClearColor(0.4, 0.7, 0.9, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glDisable(GL_SCISSOR_TEST);
int x = 0;
qDebug() << "*** paintGL ***";
showBuffers();
for (auto buffer: qAsConst(m_buffers)) {
m_blitter->bind();
QSize s(buffer->size());
qDebug() << "painting" << buffer << s;
if (s.width() > 1024) {
qDebug() << "showing large buffer at reduced size";
s = QSize(128,128);
}
QRectF targetRect(QPointF(x,0), s);
QOpenGLTexture *texture = buffer->toOpenGlTexture();
if (!texture) {
qWarning("Null texture");
continue;
}
auto surfaceOrigin = QOpenGLTextureBlitter::OriginTopLeft;
QMatrix4x4 targetTransform = QOpenGLTextureBlitter::targetTransform(targetRect, QRect(QPoint(), size()));
m_blitter->blit(texture->textureId(), targetTransform, surfaceOrigin);
m_blitter->release();
x += s.width() + 10;
}
}
private:
void getImage(const QString &key) {
if (!m_buffers.contains(key))
m_extension->requestImage(key);
}
void showBuffers() const
{
auto end = m_buffers.cend();
for (auto it = m_buffers.cbegin(); it != end; ++it) {
qDebug() << " " << it.key() << it.value();
}
}
void unloadImageAt(const QPoint &pos) {
int x = 0;
QtWaylandClient::QWaylandServerBuffer *foundBuffer = nullptr;
QString name;
auto end = m_buffers.cend();
for (auto it = m_buffers.cbegin(); it != end; ++it) {
auto *buffer = it.value();
QSize s(buffer->size());
if (s.width() > 1024)
s = QSize(128,128);
QRectF targetRect(QPointF(x,0), s);
//qDebug() << " " << it.key() << it.value() << targetRect << pos;
if (targetRect.contains(pos)) {
foundBuffer = buffer;
name = it.key();
//qDebug() << "FOUND!!";
break;
}
x += s.width() + 10;
}
if (foundBuffer) {
qDebug() << "unloading image" << name << "found at" << pos;
unloadImage(name);
} else {
qDebug() << "no image at" << pos;
}
}
void unloadImage(const QString &key) {
auto *buf = m_buffers.take(key);
if (buf) {
qDebug() << "unloadImage deleting" << buf;
delete buf;
m_extension->abandonImage(key);
}
update();
}
QOpenGLTextureBlitter *m_blitter = nullptr;
TextureSharingExtension *m_extension = nullptr;
QMap<QString, QtWaylandClient::QWaylandServerBuffer*> m_buffers;
};
int main (int argc, char **argv)
{
QGuiApplication app(argc, argv);
TestWindow window;
window.show();
return app.exec();
}
#include "main.moc"
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