C++ QSurfaceFormat::majorVersion方法代码示例

static HGLRC createContext(const QOpenGLStaticContext &staticContext,
                           HDC hdc,
                           const QSurfaceFormat &format,
                           const QWindowsOpenGLAdditionalFormat &,
                           HGLRC shared = 0)
{
    enum { attribSize = 11 };

    if (!staticContext.hasExtensions())
        return 0;
    int attributes[attribSize];
    int attribIndex = 0;
    qFill(attributes, attributes + attribSize, int(0));
    const int requestedVersion = (format.majorVersion() << 8) + format.minorVersion();
    if (requestedVersion > 0x0101) {
        attributes[attribIndex++] = WGL_CONTEXT_MAJOR_VERSION_ARB;
        attributes[attribIndex++] = format.majorVersion();
        attributes[attribIndex++] = WGL_CONTEXT_MINOR_VERSION_ARB;
        attributes[attribIndex++] = format.minorVersion();
    }
    if (requestedVersion >= 0x0300) {
        attributes[attribIndex++] = WGL_CONTEXT_FLAGS_ARB;
        attributes[attribIndex] = 0;
        if (format.testOption(QSurfaceFormat::DeprecatedFunctions))
             attributes[attribIndex] |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
        if (format.testOption(QSurfaceFormat::DebugContext))
            attributes[attribIndex++] |= WGL_CONTEXT_DEBUG_BIT_ARB;
        attribIndex++;
    }
    if (requestedVersion >= 0x0302) {
        switch (format.profile()) {
        case QSurfaceFormat::NoProfile:
            break;
        case QSurfaceFormat::CoreProfile:
            attributes[attribIndex++] = WGL_CONTEXT_PROFILE_MASK_ARB;
            attributes[attribIndex++] = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
            break;
        case QSurfaceFormat::CompatibilityProfile:
            attributes[attribIndex++] = WGL_CONTEXT_PROFILE_MASK_ARB;
            attributes[attribIndex++] = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
            break;
        }
    }
    if (QWindowsContext::verboseGL)
        qDebug("%s: Creating context version %d.%d with %d attributes",
               __FUNCTION__,  format.majorVersion(), format.minorVersion(), attribIndex / 2);

    const HGLRC result =
        staticContext.wglCreateContextAttribsARB(hdc, shared, attributes);
    if (!result)
        qErrnoWarning("%s: wglCreateContextAttribsARB() failed.", __FUNCTION__);
    return result;
}

void GLWidget277::debugContextVersion() {
  QOpenGLContext *ctx = context();
  QSurfaceFormat form = format();
  QSurfaceFormat ctxform = ctx->format();
  QSurfaceFormat::OpenGLContextProfile prof = ctxform.profile();

  const char *profile =
    prof == QSurfaceFormat::CoreProfile ? "Core" :
    prof == QSurfaceFormat::CompatibilityProfile ? "Compatibility" :
    "None";
  int ctxmajor = ctxform.majorVersion();
  int ctxminor = ctxform.minorVersion();
  bool valid = ctx->isValid();
  int formmajor = form.majorVersion();
  int formminor = form.minorVersion();
  const char *vendor = glGS(GL_VENDOR);
  const char *renderer = glGS(GL_RENDERER);
  const char *version = glGS(GL_VERSION);
  const char *s_glsl = glGS(GL_SHADING_LANGUAGE_VERSION);

  printf("Widget version: %d.%d\n", ctxmajor, ctxminor);
  printf("Context valid: %s\n", valid ? "yes" : "NO");
  printf("Format version: %d.%d\n", formmajor, formminor);
  printf("Profile: %s\n", profile);
  printf("  Vendor:   %s\n", vendor);
  printf("  Renderer: %s\n", renderer);
  printf("  Version:  %s\n", version);
  printf("  GLSL:     %s\n", s_glsl);

  QString glsl = s_glsl;
  if (ctxmajor < 3 || glsl.startsWith("1.10") || glsl.startsWith("1.20")) {
    printf("ERROR: "
           "Unable to get an OpenGL 3.x context with GLSL 1.30 or newer. "
           "If your hardware should support it, update your drivers. "
           "If you have switchable graphics, make sure that you are using the discrete GPU.\n");
    QApplication::exit();
  } else if ((ctxmajor == 3 && ctxminor < 2) || glsl.startsWith("1.30") || glsl.startsWith("1.40")) {
    printf("WARNING: "
           "Unable to get an OpenGL 3.2 context with GLSL 1.50. "
           "If your hardware should support it, update your drivers. "
           "If you have switchable graphics, make sure that you are using the discrete GPU. "
           "If you cannot get 3.2 support, it is possible to port this project....");

    // Note: doing this requires at least the following actions:
    // * Change the header and base class in glwidget277.h to 3.0/3.1 instead of 3.2 Core.
    // * Change the shaders to require GLSL 1.30 or 1.40.
  }
}

void Widget::printFormat(const QSurfaceFormat &format)
{
    m_output->append(tr("OpenGL version: %1.%2").arg(format.majorVersion()).arg(format.minorVersion()));

    for (size_t i = 0; i < sizeof(profiles) / sizeof(Profile); ++i)
        if (profiles[i].profile == format.profile()) {
            m_output->append(tr("Profile: %1").arg(QString::fromLatin1(profiles[i].str)));
            break;
        }

    QString opts;
    for (size_t i = 0; i < sizeof(options) / sizeof(Option); ++i)
        if (format.testOption(options[i].option))
            opts += QString::fromLatin1(options[i].str) + QLatin1Char(' ');
    m_output->append(tr("Options: %1").arg(opts));

    for (size_t i = 0; i < sizeof(renderables) / sizeof(Renderable); ++i)
        if (renderables[i].renderable == format.renderableType()) {
            m_output->append(tr("Renderable type: %1").arg(QString::fromLatin1(renderables[i].str)));
            break;
        }

    m_output->append(tr("Depth buffer size: %1").arg(QString::number(format.depthBufferSize())));
    m_output->append(tr("Stencil buffer size: %1").arg(QString::number(format.stencilBufferSize())));
    m_output->append(tr("Samples: %1").arg(QString::number(format.samples())));
    m_output->append(tr("Red buffer size: %1").arg(QString::number(format.redBufferSize())));
    m_output->append(tr("Green buffer size: %1").arg(QString::number(format.greenBufferSize())));
    m_output->append(tr("Blue buffer size: %1").arg(QString::number(format.blueBufferSize())));
    m_output->append(tr("Alpha buffer size: %1").arg(QString::number(format.alphaBufferSize())));
    m_output->append(tr("Swap interval: %1").arg(QString::number(format.swapInterval())));
}

QT_BEGIN_NAMESPACE

/*!
    Returns an OpenGL format for the window format specified by \a format.
*/
QGLFormat QGLFormat::fromSurfaceFormat(const QSurfaceFormat &format)
{
    QGLFormat retFormat;
    if (format.alphaBufferSize() >= 0)
        retFormat.setAlphaBufferSize(format.alphaBufferSize());
    if (format.blueBufferSize() >= 0)
        retFormat.setBlueBufferSize(format.blueBufferSize());
    if (format.greenBufferSize() >= 0)
        retFormat.setGreenBufferSize(format.greenBufferSize());
    if (format.redBufferSize() >= 0)
        retFormat.setRedBufferSize(format.redBufferSize());
    if (format.depthBufferSize() >= 0)
        retFormat.setDepthBufferSize(format.depthBufferSize());
    if (format.samples() > 1) {
        retFormat.setSampleBuffers(true);
        retFormat.setSamples(format.samples());
    }
    if (format.stencilBufferSize() > 0) {
        retFormat.setStencil(true);
        retFormat.setStencilBufferSize(format.stencilBufferSize());
    }
    retFormat.setDoubleBuffer(format.swapBehavior() != QSurfaceFormat::SingleBuffer);
    retFormat.setStereo(format.stereo());
    retFormat.setVersion(format.majorVersion(), format.minorVersion());
    retFormat.setProfile(static_cast<QGLFormat::OpenGLContextProfile>(format.profile()));
    return retFormat;
}

int main(int argc, char **argv)
{
  QGuiApplication app(argc, argv);
  // create an OpenGL format specifier
  QSurfaceFormat format;
  // set the number of samples for multisampling
  // will need to enable glEnable(GL_MULTISAMPLE); once we have a context
  format.setSamples(4);
  #if defined( __APPLE__)
    // at present mac osx Mountain Lion only supports GL3.2
    // the new mavericks will have GL 4.x so can change
    format.setMajorVersion(4);
    format.setMinorVersion(1);
  #else
    // with luck we have the latest GL version so set to this
    format.setMajorVersion(4);
    format.setMinorVersion(3);
  #endif
  // now we are going to set to CoreProfile OpenGL so we can't use and old Immediate mode GL
  format.setProfile(QSurfaceFormat::CoreProfile);
  // now set the depth buffer to 24 bits
  format.setDepthBufferSize(24);
  // now we are going to create our scene window
  NGLScene window;
  // and set the OpenGL format
  window.setFormat(format);
  // we can now query the version to see if it worked
  std::cout<<"Profile is "<<format.majorVersion()<<" "<<format.minorVersion()<<"\n";
  // set the window size
  // and finally show
  window.show();
  window.resize(1024, 720);

  return app.exec();
}

void tst_QOpenGL::openGLPaintDevice()
{
#if defined(Q_OS_LINUX) && defined(Q_CC_GNU) && !defined(__x86_64__)
    QSKIP("QTBUG-22617");
#endif

    QFETCH(int, surfaceClass);
    QScopedPointer<QSurface> surface(createSurface(surfaceClass));

    QOpenGLContext ctx;
    QVERIFY(ctx.create());

    QSurfaceFormat format = ctx.format();
    if (format.majorVersion() < 2)
        QSKIP("This test requires at least OpenGL 2.0");
    QVERIFY(ctx.makeCurrent(surface.data()));

    const QSize size(128, 128);

    QImage image(size, QImage::Format_RGB32);
    QPainter p(&image);
    p.fillRect(0, 0, image.width() / 2, image.height() / 2, Qt::red);
    p.fillRect(image.width() / 2, 0, image.width() / 2, image.height() / 2, Qt::green);
    p.fillRect(image.width() / 2, image.height() / 2, image.width() / 2, image.height() / 2, Qt::blue);
    p.fillRect(0, image.height() / 2, image.width() / 2, image.height() / 2, Qt::white);
    p.end();

    QOpenGLFramebufferObject fbo(size);
    QVERIFY(fbo.bind());

    QOpenGLPaintDevice device(size);
    QVERIFY(p.begin(&device));
    p.fillRect(0, 0, image.width() / 2, image.height() / 2, Qt::red);
    p.fillRect(image.width() / 2, 0, image.width() / 2, image.height() / 2, Qt::green);
    p.fillRect(image.width() / 2, image.height() / 2, image.width() / 2, image.height() / 2, Qt::blue);
    p.fillRect(0, image.height() / 2, image.width() / 2, image.height() / 2, Qt::white);
    p.end();

    QImage actual = fbo.toImage().convertToFormat(QImage::Format_RGB32);
    QCOMPARE(image.size(), actual.size());
    QCOMPARE(image, actual);

    QVERIFY(p.begin(&device));
    p.fillRect(0, 0, image.width(), image.height(), Qt::black);
    p.drawImage(0, 0, image);
    p.end();

    actual = fbo.toImage().convertToFormat(QImage::Format_RGB32);
    QCOMPARE(image.size(), actual.size());
    QCOMPARE(image, actual);

    QVERIFY(p.begin(&device));
    p.fillRect(0, 0, image.width(), image.height(), Qt::black);
    p.fillRect(0, 0, image.width(), image.height(), QBrush(image));
    p.end();

    actual = fbo.toImage().convertToFormat(QImage::Format_RGB32);
    QCOMPARE(image.size(), actual.size());
    QCOMPARE(image, actual);
}

int main(int argc, char **argv)
{
  QGuiApplication app(argc, argv);
  // create an OpenGL format specifier
  QSurfaceFormat format;
  // set the number of samples for multisampling
  // will need to enable glEnable(GL_MULTISAMPLE); once we have a context
  format.setSamples(4);
  format.setMajorVersion(3);
  format.setMinorVersion(2);
  // now we are going to set to Compat Profile OpenGL so we can use and old Immediate mode GL
  format.setProfile(QSurfaceFormat::CompatibilityProfile);
  // now set the depth buffer to 24 bits
  format.setDepthBufferSize(24);
  QSurfaceFormat::setDefaultFormat(format);
  // now we are going to create our scene window
  OpenGLWindow window;
  // we can now query the version to see if it worked
  std::cout<<"Profile is "<<format.majorVersion()<<" "<<format.minorVersion()<<"\n";
  // set the window size
  window.resize(1024, 720);
  // and finally show
  window.show();

  return app.exec();
}

bool QOpenGLFunctions_ES2::isContextCompatible(QOpenGLContext *context)
{
    Q_ASSERT(context);
    QSurfaceFormat f = context->format();
    const QPair<int, int> v = qMakePair(f.majorVersion(), f.minorVersion());
    if (v < qMakePair(2, 0))
        return false;
    if (f.renderableType() != QSurfaceFormat::OpenGLES)
        return false;

    return true;
}

void debugFormatVersion() {
  QSurfaceFormat form = QSurfaceFormat::defaultFormat();
  QSurfaceFormat::OpenGLContextProfile prof = form.profile();

  const char *profile =
    prof == QSurfaceFormat::CoreProfile ? "Core" :
    prof == QSurfaceFormat::CompatibilityProfile ? "Compatibility" :
    "None";

  printf("Requested format:\n");
  printf("  Version: %d.%d\n", form.majorVersion(), form.minorVersion());
  printf("  Profile: %s\n", profile);
}

bool QOpenGLFunctions_4_1_Compatibility::isContextCompatible(QOpenGLContext *context)
{
    Q_ASSERT(context);
    QSurfaceFormat f = context->format();
    const QPair<int, int> v = qMakePair(f.majorVersion(), f.minorVersion());
    if (v < qMakePair(4, 1))
        return false;

    if (f.profile() == QSurfaceFormat::CoreProfile)
        return false;

    return true;
}

int KisOpenGL::initializeContext(QOpenGLContext* s) {
#ifdef HAVE_OPENGL
    KisConfig cfg;
    dbgUI << "OpenGL: Opening new context";

    // Double check we were given the version we requested
    QSurfaceFormat format = s->format();
    glVersion = 100 * format.majorVersion() + format.minorVersion();

    if (!SharedSurface) {
        SharedSurface = new QOffscreenSurface();
        SharedSurface->setFormat(format);
        SharedSurface->create();
    }

    if (!SharedContext) {
        SharedContext = new QOpenGLContext;
        SharedContext->setFormat(format);
        SharedContext->setShareContext(s);
        SharedContext->create();
        SharedContext->makeCurrent(SharedSurface);
    }

    QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();

    QFile log(QDesktopServices::storageLocation(QDesktopServices::TempLocation) + "/krita-opengl.txt");
    log.open(QFile::WriteOnly);
    QString vendor((const char*)f->glGetString(GL_VENDOR));
    log.write(vendor.toLatin1());
    log.write(", ");
    QString renderer((const char*)f->glGetString(GL_RENDERER));
    log.write(renderer.toLatin1());
    log.write(", ");
    QString version((const char*)f->glGetString(GL_VERSION));
    log.write(version.toLatin1());

    // Check if we have a bugged driver that needs fence workaround
    bool isOnX11 = false;
#ifdef HAVE_X11
    isOnX11 = true;
#endif

    if ((isOnX11 && renderer.startsWith("AMD")) || cfg.forceOpenGLFenceWorkaround()) {
        NeedsFenceWorkaround = true;
    }
#else
    Q_UNUSED(s);
    NeedsFenceWorkaround = false;
#endif
    return glVersion;
}

QWaylandBrcmGLContext::QWaylandBrcmGLContext(EGLDisplay eglDisplay, const QSurfaceFormat &format, QPlatformOpenGLContext *share)
    : QPlatformOpenGLContext()
    , m_eglDisplay(eglDisplay)
    , m_config(q_configFromGLFormat(m_eglDisplay, brcmFixFormat(format), true))
    , m_format(q_glFormatFromConfig(m_eglDisplay, m_config))
{
    EGLContext shareEGLContext = share ? static_cast<QWaylandBrcmGLContext *>(share)->eglContext() : EGL_NO_CONTEXT;

    eglBindAPI(EGL_OPENGL_ES_API);

    QVector<EGLint> eglContextAttrs;
    eglContextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
    eglContextAttrs.append(format.majorVersion() == 1 ? 1 : 2);
    eglContextAttrs.append(EGL_NONE);

    m_context = eglCreateContext(m_eglDisplay, m_config, shareEGLContext, eglContextAttrs.constData());
}

void tst_QQuickOpenGLInfo::testProperties()
{
    QQuickView view;
    view.setSource(testFileUrl("basic.qml"));

    view.show();
    QVERIFY(QTest::qWaitForWindowExposed(&view));

    QSignalSpy spy(&view, SIGNAL(sceneGraphInitialized()));
    spy.wait();

    QVERIFY(view.openglContext());
    QSurfaceFormat format = view.openglContext()->format();

    QObject* obj = view.rootObject();
    QVERIFY(obj);
    QCOMPARE(obj->property("majorVersion").toInt(), format.majorVersion());
    QCOMPARE(obj->property("minorVersion").toInt(), format.minorVersion());
    QCOMPARE(obj->property("profile").toInt(), static_cast<int>(format.profile()));
    QCOMPARE(obj->property("renderableType").toInt(), static_cast<int>(format.renderableType()));
}

void HsQMLCanvasBackEnd::doRendering()
{
    if (!mGL) {
        mGL = mWindow->openglContext();
        QObject::connect(
            mGL, SIGNAL(aboutToBeDestroyed()), this, SLOT(doCleanup()));
        HsQMLGLCanvasType ctype;
        QSurfaceFormat format = mGL->format();
        switch (format.renderableType()) {
            case QSurfaceFormat::OpenGL: ctype = HSQML_GL_DESKTOP; break;
            case QSurfaceFormat::OpenGLES: ctype = HSQML_GL_ES; break;
            default: setStatus(HsQMLCanvas::BadConfig); return;
        }
        mGLViewportFn = reinterpret_cast<GLViewportFn>(
            mGL->getProcAddress("glViewport"));
        mGLClearColorFn = reinterpret_cast<GLClearColorFn>(
            mGL->getProcAddress("glClearColor"));
        mGLClearFn = reinterpret_cast<GLClearFn>(
            mGL->getProcAddress("glClear"));
        if (!mGLViewportFn || !mGLClearColorFn || !mGLClearFn) {
            setStatus(HsQMLCanvas::BadProcs);
            return;
        }
        mGLCallbacks->mSetupCb(
            ctype, format.majorVersion(), format.minorVersion());
    }

    // Reset OpenGL state before rendering
#if QT_VERSION >= 0x050200
    mWindow->resetOpenGLState();
#else
#warning Resetting OpenGL state requires Qt 5.2 or later
#endif

    // Clear window if painting below the scenegraph
    if (mWinInfo.needsBelowClear()) {
        QColor bg = mWindow->color();
        mGLClearColorFn(bg.redF(), bg.greenF(), bg.blueF(), bg.alphaF());
        mGLClearFn(GL_COLOR_BUFFER_BIT);
    }

    // Setup prior to paint callback
    QMatrix4x4 matrix;
    bool inlineMode = HsQMLCanvas::Inline == mDisplayMode;
    if (inlineMode) {
        if (!mFBO->bind()) {
            setStatus(HsQMLCanvas::BadBind);
            return;
        }
        mGLViewportFn(0, 0, qCeil(mCanvasWidth), qCeil(mCanvasHeight));

        // Clear FBO to transparent
        mGLClearColorFn(0, 0, 0, 0);
        mGLClearFn(GL_COLOR_BUFFER_BIT);
    }
    else {
        // Calculate matrix for non-inline display modes
        QMatrix4x4 smatrix;
        QSGNode* node = mTransformNode;
        while (node) {
            if (QSGNode::TransformNodeType == node->type()) {
                QSGTransformNode* tnode = static_cast<QSGTransformNode*>(node);
                smatrix = tnode->matrix() * smatrix;
            }
            node = node->parent();
        }
        matrix.translate(-1, 1);
        matrix.scale(2.0f/mWindow->width(), -2.0f/mWindow->height());
        matrix *= smatrix;
        matrix.scale(mItemWidth/2.0f, mItemHeight/2.0f);
        matrix.translate(1, 1);

        mGLViewportFn(0, 0, mWindow->width(), mWindow->height());
    }

    setStatus(HsQMLCanvas::Okay);
    mGLCallbacks->mPaintCb(matrix.data(), mItemWidth, mItemHeight);

    if (inlineMode) {
        mFBO->release();
    }
}

void QEGLPlatformContext::init(const QSurfaceFormat &format, QPlatformOpenGLContext *share)
{
    m_format = q_glFormatFromConfig(m_eglDisplay, m_eglConfig);
    // m_format now has the renderableType() resolved (it cannot be Default anymore)
    // but does not yet contain version, profile, options.
    m_shareContext = share ? static_cast<QEGLPlatformContext *>(share)->m_eglContext : 0;

    QVector<EGLint> contextAttrs;
    contextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
    contextAttrs.append(format.majorVersion());
    const bool hasKHRCreateContext = q_hasEglExtension(m_eglDisplay, "EGL_KHR_create_context");
    if (hasKHRCreateContext) {
        contextAttrs.append(EGL_CONTEXT_MINOR_VERSION_KHR);
        contextAttrs.append(format.minorVersion());
        int flags = 0;
        // The debug bit is supported both for OpenGL and OpenGL ES.
        if (format.testOption(QSurfaceFormat::DebugContext))
            flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
        // The fwdcompat bit is only for OpenGL 3.0+.
        if (m_format.renderableType() == QSurfaceFormat::OpenGL
            && format.majorVersion() >= 3
            && !format.testOption(QSurfaceFormat::DeprecatedFunctions))
            flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
        if (flags) {
            contextAttrs.append(EGL_CONTEXT_FLAGS_KHR);
            contextAttrs.append(flags);
        }
        // Profiles are OpenGL only and mandatory in 3.2+. The value is silently ignored for < 3.2.
        if (m_format.renderableType() == QSurfaceFormat::OpenGL) {
            contextAttrs.append(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR);
            contextAttrs.append(format.profile() == QSurfaceFormat::CoreProfile
                                ? EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR
                                : EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR);
        }
    }
    contextAttrs.append(EGL_NONE);

    switch (m_format.renderableType()) {
    case QSurfaceFormat::OpenVG:
        m_api = EGL_OPENVG_API;
        break;
#ifdef EGL_VERSION_1_4
    case QSurfaceFormat::OpenGL:
        m_api = EGL_OPENGL_API;
        break;
#endif // EGL_VERSION_1_4
    default:
        m_api = EGL_OPENGL_ES_API;
        break;
    }

    eglBindAPI(m_api);
    m_eglContext = eglCreateContext(m_eglDisplay, m_eglConfig, m_shareContext, contextAttrs.constData());
    if (m_eglContext == EGL_NO_CONTEXT && m_shareContext != EGL_NO_CONTEXT) {
        m_shareContext = 0;
        m_eglContext = eglCreateContext(m_eglDisplay, m_eglConfig, 0, contextAttrs.constData());
    }

    if (m_eglContext == EGL_NO_CONTEXT) {
        qWarning("QEGLPlatformContext: Failed to create context: %x", eglGetError());
        return;
    }

    static const bool printConfig = qEnvironmentVariableIntValue("QT_QPA_EGLFS_DEBUG");
    if (printConfig) {
        qDebug() << "Created context for format" << format << "with config:";
        q_printEglConfig(m_eglDisplay, m_eglConfig);
    }

    // Cannot just call updateFormatFromGL() since it relies on virtuals. Defer it to initialize().
}