qt 6.5.1 original

tests/auto/gui/kernel/qopenglwindow/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_qopenglwindow Test:
+#####################################################################
+
+qt_internal_add_test(tst_qopenglwindow
+    SOURCES
+        tst_qopenglwindow.cpp
+    LIBRARIES
+        Qt::CorePrivate
+        Qt::Gui
+        Qt::GuiPrivate
+        Qt::OpenGL
+)

tests/auto/gui/kernel/qopenglwindow/tst_qopenglwindow.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QtOpenGL/QOpenGLWindow>
+#include <QTest>
+#include <QtGui/QOpenGLFunctions>
+#include <QtGui/QOpenGLContext>
+#include <QtGui/QPainter>
+#include <private/qguiapplication_p.h>
+#include <qpa/qplatformintegration.h>
+
+class tst_QOpenGLWindow : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void initTestCase();
+    void create();
+    void basic();
+    void resize();
+    void painter();
+    void partial_data();
+    void partial();
+    void underOver();
+};
+
+void tst_QOpenGLWindow::initTestCase()
+{
+    if (!QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::OpenGL))
+        QSKIP("OpenGL is not supported on this platform.");
+}
+
+void tst_QOpenGLWindow::create()
+{
+    QOpenGLWindow w;
+    QVERIFY(!w.isValid());
+
+    w.resize(640, 480);
+    w.show();
+
+    QVERIFY(QTest::qWaitForWindowExposed(&w));
+
+    QVERIFY(w.isValid());
+}
+
+class Window : public QOpenGLWindow
+{
+public:
+    void reset() {
+        initCount = resizeCount = paintCount = 0;
+    }
+
+    void initializeGL() override {
+        ++initCount;
+    }
+
+    void resizeGL(int w, int h) override {
+        ++resizeCount;
+        QCOMPARE(w, size().width());
+        QCOMPARE(h, size().height());
+    }
+
+    void paintGL() override {
+        ++paintCount;
+
+        QOpenGLContext *ctx = QOpenGLContext::currentContext();
+        QVERIFY(ctx);
+        QCOMPARE(ctx, context());
+        QOpenGLFunctions *f = ctx->functions();
+        QVERIFY(f);
+
+        f->glClearColor(1, 0, 0, 1);
+        f->glClear(GL_COLOR_BUFFER_BIT);
+
+        img = grabFramebuffer();
+    }
+
+    int initCount;
+    int resizeCount;
+    int paintCount;
+    QImage img;
+};
+
+void tst_QOpenGLWindow::basic()
+{
+    Window w;
+    w.reset();
+    w.resize(640, 480);
+    w.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&w));
+
+    // Check that the virtuals are invoked.
+    QCOMPARE(w.initCount, 1);
+    QVERIFY(w.resizeCount >= 1);
+    QVERIFY(w.paintCount >= 1);
+
+    // Check that something has been drawn;
+    QCOMPARE(w.img.size(), w.size() * w.devicePixelRatio());
+    QVERIFY(w.img.pixel(QPoint(5, 5) * w.devicePixelRatio()) == qRgb(255, 0, 0));
+
+    // Check that the viewport was properly set.
+    w.makeCurrent();
+    GLint v[4] = { 0, 0, 0, 0 };
+    w.context()->functions()->glGetIntegerv(GL_VIEWPORT, v);
+    QCOMPARE(v[0], 0);
+    QCOMPARE(v[1], 0);
+    QCOMPARE(v[2], GLint(w.width() * w.devicePixelRatio()));
+    QCOMPARE(v[3], GLint(w.height() * w.devicePixelRatio()));
+    w.doneCurrent();
+}
+
+static bool isPlatformWayland()
+{
+    return QGuiApplication::platformName().startsWith(QLatin1String("wayland"), Qt::CaseInsensitive);
+}
+
+void tst_QOpenGLWindow::resize()
+{
+    if (isPlatformWayland())
+        QSKIP("Wayland: Crashes on Intel Mesa due to a driver bug (QTBUG-66848).");
+
+    Window w;
+    w.reset();
+    w.resize(640, 480);
+    w.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&w));
+
+    // Check that the virtuals are invoked.
+    int resCount = w.resizeCount;
+    QVERIFY(resCount >= 1);
+
+    // Check that a future resize triggers resizeGL.
+    w.resize(800, 600);
+    QTRY_VERIFY(w.resizeCount > resCount);
+}
+
+class PainterWindow : public QOpenGLWindow
+{
+public:
+    void paintGL() override {
+        QOpenGLContext *ctx = QOpenGLContext::currentContext();
+        QVERIFY(ctx);
+        QCOMPARE(ctx, context());
+        QOpenGLFunctions *f = ctx->functions();
+        QVERIFY(f);
+
+        QPainter p(this);
+        p.beginNativePainting();
+        f->glClearColor(1, 0, 0, 1);
+        f->glClear(GL_COLOR_BUFFER_BIT);
+        p.endNativePainting();
+        p.fillRect(QRect(0, 0, 100, 100), Qt::blue);
+        p.end();
+
+        img = grabFramebuffer();
+    }
+
+    QImage img;
+};
+
+void tst_QOpenGLWindow::painter()
+{
+    PainterWindow w;
+    w.resize(400, 400);
+    w.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&w));
+
+    QCOMPARE(w.img.size(), w.size() * w.devicePixelRatio());
+    QVERIFY(w.img.pixel(QPoint(5, 5) * w.devicePixelRatio()) == qRgb(0, 0, 255));
+    QVERIFY(w.img.pixel(QPoint(200, 5) * w.devicePixelRatio()) == qRgb(255, 0, 0));
+}
+
+class PartialPainterWindow : public QOpenGLWindow
+{
+public:
+    PartialPainterWindow(QOpenGLWindow::UpdateBehavior u)
+        : QOpenGLWindow(u), x(0) { }
+
+    void paintGL() override {
+        ++paintCount;
+
+        QPainter p(this);
+        if (!x)
+            p.fillRect(QRect(0, 0, width(), height()), Qt::green);
+
+        p.fillRect(QRect(x, 0, 10, 10), Qt::blue);
+        x += 20;
+    }
+
+    int paintCount;
+    int x;
+};
+
+void tst_QOpenGLWindow::partial_data()
+{
+    QTest::addColumn<int>("behavior");
+    QTest::newRow("blit") << int(QOpenGLWindow::PartialUpdateBlit);
+    QTest::newRow("blend") << int(QOpenGLWindow::PartialUpdateBlend);
+}
+
+void tst_QOpenGLWindow::partial()
+{
+    QFETCH(int, behavior);
+    QOpenGLWindow::UpdateBehavior u = QOpenGLWindow::UpdateBehavior(behavior);
+    PartialPainterWindow w(u);
+    w.resize(800, 400);
+    w.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&w));
+
+    // Add a couple of small blue rects.
+    for (int i = 0; i < 10; ++i) {
+        w.paintCount = 0;
+        w.update();
+        QTRY_VERIFY(w.paintCount > 0);
+    }
+
+    // Now since the painting went to an extra framebuffer, all the rects should
+    // be present since everything is preserved between the frames.
+    QImage img = w.grabFramebuffer();
+    QCOMPARE(img.size(), w.size() * w.devicePixelRatio());
+    QCOMPARE(img.pixel(QPoint(5, 5) * w.devicePixelRatio()), qRgb(0, 0, 255));
+    QCOMPARE(img.pixel(QPoint(15, 5) * w.devicePixelRatio()), qRgb(0, 255, 0));
+    QCOMPARE(img.pixel(QPoint(25, 5) * w.devicePixelRatio()), qRgb(0, 0, 255));
+}
+
+class PaintUnderOverWindow : public QOpenGLWindow
+{
+public:
+    PaintUnderOverWindow() : QOpenGLWindow(PartialUpdateBlend), m_state(None) { }
+    enum State {
+        None,
+        PaintUnder,
+        Paint,
+        PaintOver,
+        Error
+    } m_state;
+
+    void paintUnderGL() override {
+        if (m_state == None || m_state == PaintOver)
+            m_state = PaintUnder;
+        else
+            m_state = Error;
+
+        GLuint fbo = 0xFFFF;
+        QOpenGLContext::currentContext()->functions()->glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint *) &fbo);
+        QCOMPARE(fbo, QOpenGLContext::currentContext()->defaultFramebufferObject());
+    }
+
+    void paintGL() override {
+        if (m_state == PaintUnder)
+            m_state = Paint;
+        else
+            m_state = Error;
+
+        // Using PartialUpdateBlend so paintGL() targets a user fbo, not the default.
+        GLuint fbo = 0xFFFF;
+        QOpenGLContext::currentContext()->functions()->glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint *) &fbo);
+        QVERIFY(fbo != QOpenGLContext::currentContext()->defaultFramebufferObject());
+        QCOMPARE(fbo, defaultFramebufferObject());
+    }
+
+    void paintOverGL() override {
+        if (m_state == Paint)
+            m_state = PaintOver;
+        else
+            m_state = Error;
+
+        GLuint fbo = 0xFFFF;
+        QOpenGLContext::currentContext()->functions()->glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint *) &fbo);
+        QCOMPARE(fbo, QOpenGLContext::currentContext()->defaultFramebufferObject());
+    }
+};
+
+void tst_QOpenGLWindow::underOver()
+{
+    PaintUnderOverWindow w;
+    w.resize(400, 400);
+    w.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&w));
+
+    // under -> paint -> over -> under -> paint -> ... is the only acceptable sequence
+    QCOMPARE(w.m_state, PaintUnderOverWindow::PaintOver);
+}
+
+#include <tst_qopenglwindow.moc>
+
+QTEST_MAIN(tst_QOpenGLWindow)