C++ QPlatformWindowFormat::setRedBufferSize方法代码示例

/*!
    \since 4.8

    Returns a platform window format for the OpenGL format specified by \a format.
*/
QPlatformWindowFormat QGLFormat::toPlatformWindowFormat(const QGLFormat &format)
{
    QPlatformWindowFormat retFormat;
    retFormat.setAccum(format.accum());
    if (format.accumBufferSize() >= 0)
        retFormat.setAccumBufferSize(format.accumBufferSize());
    retFormat.setAlpha(format.alpha());
    if (format.alphaBufferSize() >= 0)
        retFormat.setAlphaBufferSize(format.alphaBufferSize());
    if (format.blueBufferSize() >= 0)
        retFormat.setBlueBufferSize(format.blueBufferSize());
    retFormat.setDepth(format.depth());
    if (format.depthBufferSize() >= 0)
        retFormat.setDepthBufferSize(format.depthBufferSize());
    retFormat.setDirectRendering(format.directRendering());
    retFormat.setDoubleBuffer(format.doubleBuffer());
    if (format.greenBufferSize() >= 0)
        retFormat.setGreenBufferSize(format.greenBufferSize());
    if (format.redBufferSize() >= 0)
        retFormat.setRedBufferSize(format.redBufferSize());
    retFormat.setRgba(format.rgba());
    retFormat.setSampleBuffers(format.sampleBuffers());
    if (format.samples() >= 0)
        retFormat.setSamples(format.samples());
    retFormat.setStencil(format.stencil());
    if (format.stencilBufferSize() >= 0)
        retFormat.setStencilBufferSize(format.stencilBufferSize());
    retFormat.setStereo(format.stereo());
    retFormat.setSwapInterval(format.swapInterval());
    return retFormat;
}

QPlatformWindowFormat qglx_platformWindowFromGLXFBConfig(Display *display, GLXFBConfig config, GLXContext ctx)
{
    QPlatformWindowFormat format;
    int redSize     = 0;
    int greenSize   = 0;
    int blueSize    = 0;
    int alphaSize   = 0;
    int depthSize   = 0;
    int stencilSize = 0;
    int sampleBuffers = 0;
    int sampleCount = 0;
    int level       = 0;
    int rgba        = 0;
    int stereo      = 0;
    int accumSizeA  = 0;
    int accumSizeR  = 0;
    int accumSizeG  = 0;
    int accumSizeB  = 0;

    XVisualInfo *vi = glXGetVisualFromFBConfig(display,config);
    glXGetConfig(display,vi,GLX_RGBA,&rgba);
    XFree(vi);
    glXGetFBConfigAttrib(display, config, GLX_RED_SIZE,     &redSize);
    glXGetFBConfigAttrib(display, config, GLX_GREEN_SIZE,   &greenSize);
    glXGetFBConfigAttrib(display, config, GLX_BLUE_SIZE,    &blueSize);
    glXGetFBConfigAttrib(display, config, GLX_ALPHA_SIZE,   &alphaSize);
    glXGetFBConfigAttrib(display, config, GLX_DEPTH_SIZE,   &depthSize);
    glXGetFBConfigAttrib(display, config, GLX_STENCIL_SIZE, &stencilSize);
    glXGetFBConfigAttrib(display, config, GLX_SAMPLES,      &sampleBuffers);
    glXGetFBConfigAttrib(display, config, GLX_LEVEL,        &level);
    glXGetFBConfigAttrib(display, config, GLX_STEREO,       &stereo);
    glXGetFBConfigAttrib(display, config, GLX_ACCUM_ALPHA_SIZE, &accumSizeA);
    glXGetFBConfigAttrib(display, config, GLX_ACCUM_RED_SIZE, &accumSizeR);
    glXGetFBConfigAttrib(display, config, GLX_ACCUM_GREEN_SIZE, &accumSizeG);
    glXGetFBConfigAttrib(display, config, GLX_ACCUM_BLUE_SIZE, &accumSizeB);

    format.setRedBufferSize(redSize);
    format.setGreenBufferSize(greenSize);
    format.setBlueBufferSize(blueSize);
    format.setAlphaBufferSize(alphaSize);
    format.setDepthBufferSize(depthSize);
    format.setStencilBufferSize(stencilSize);
    format.setSampleBuffers(sampleBuffers);
    if (format.sampleBuffers()) {
        glXGetFBConfigAttrib(display, config, GLX_SAMPLES_ARB, &sampleCount);
        format.setSamples(sampleCount);
    }

    format.setDirectRendering(glXIsDirect(display, ctx));
    format.setRgba(rgba);
    format.setStereo(stereo);
    format.setAccumBufferSize(accumSizeB);

    return format;
}

QPlatformWindowFormat QXlibWindow::correctColorBuffers(const QPlatformWindowFormat &platformWindowFormat) const
{
    // I have only tested this setup on a dodgy intel setup, where I didn't use standard libs,
    // so this might be not what we want to do :)
    if ( !(platformWindowFormat.redBufferSize() == -1   &&
            platformWindowFormat.greenBufferSize() == -1 &&
            platformWindowFormat.blueBufferSize() == -1))
        return platformWindowFormat;

    QPlatformWindowFormat windowFormat = platformWindowFormat;
    if (mScreen->depth() == 16) {
        windowFormat.setRedBufferSize(5);
        windowFormat.setGreenBufferSize(6);
        windowFormat.setBlueBufferSize(5);
    } else {
        windowFormat.setRedBufferSize(8);
        windowFormat.setGreenBufferSize(8);
        windowFormat.setBlueBufferSize(8);
    }

    return windowFormat;
}

QPlatformWindowFormat qt_qPlatformWindowFormatFromConfig(EGLDisplay display, const EGLConfig config)
{
    QPlatformWindowFormat format;
    EGLint redSize     = 0;
    EGLint greenSize   = 0;
    EGLint blueSize    = 0;
    EGLint alphaSize   = 0;
    EGLint depthSize   = 0;
    EGLint stencilSize = 0;
    EGLint sampleCount = 0;
    EGLint level       = 0;

    eglGetConfigAttrib(display, config, EGL_RED_SIZE,     &redSize);
    eglGetConfigAttrib(display, config, EGL_GREEN_SIZE,   &greenSize);
    eglGetConfigAttrib(display, config, EGL_BLUE_SIZE,    &blueSize);
    eglGetConfigAttrib(display, config, EGL_ALPHA_SIZE,   &alphaSize);
    eglGetConfigAttrib(display, config, EGL_DEPTH_SIZE,   &depthSize);
    eglGetConfigAttrib(display, config, EGL_STENCIL_SIZE, &stencilSize);
    eglGetConfigAttrib(display, config, EGL_SAMPLES,      &sampleCount);
    eglGetConfigAttrib(display, config, EGL_LEVEL,        &level);

    format.setRedBufferSize(redSize);
    format.setGreenBufferSize(greenSize);
    format.setBlueBufferSize(blueSize);
    format.setAlphaBufferSize(alphaSize);
    format.setDepthBufferSize(depthSize);
    format.setStencilBufferSize(stencilSize);
    format.setSamples(sampleCount);
    format.setDirectRendering(true); // All EGL contexts are direct-rendered
    format.setRgba(true);            // EGL doesn't support colour index rendering
    format.setStereo(false);         // EGL doesn't support stereo buffers
    format.setAccumBufferSize(0);    // EGL doesn't support accululation buffers
    format.setDoubleBuffer(true);

    // Clear the EGL error state because some of the above may
    // have errored out because the attribute is not applicable
    // to the surface type.  Such errors don't matter.
    eglGetError();

    return format;
}

QOpenKODEWindow::QOpenKODEWindow(QWidget *tlw)
    : QPlatformWindow(tlw), isFullScreen(false)
{
    if (tlw->platformWindowFormat().windowApi() == QPlatformWindowFormat::OpenVG) {
        m_eglApi = EGL_OPENVG_API;
    } else {
        m_eglContextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
        m_eglContextAttrs.append(2);

        m_eglApi = EGL_OPENGL_ES_API;
    }
    eglBindAPI(m_eglApi);

    m_eglContextAttrs.append(EGL_NONE);
    m_eglWindowAttrs.append(EGL_NONE);

    QList<QPlatformScreen *> screens = QApplicationPrivate::platformIntegration()->screens();
    //XXXX: jl figure out how to pick the correct screen.
//    Q_ASSERT(screens.size() > tlw->d_func()->screenNumber);
//    QOpenKODEScreen *screen = qobject_cast<QOpenKODEScreen *>(screens.at(tlw->d_func()->screenNumber));
    QOpenKODEScreen *screen = qobject_cast<QOpenKODEScreen *>(screens.at(0));
    if (!screen) {
        qErrnoWarning("Could not make QOpenKODEWindow without a screen");
    }

    QPlatformWindowFormat format = tlw->platformWindowFormat();
    format.setRedBufferSize(5);
    format.setGreenBufferSize(6);
    format.setBlueBufferSize(5);

    m_eglConfig = q_configFromQPlatformWindowFormat(screen->eglDisplay(),format);

    m_kdWindow = kdCreateWindow(screen->eglDisplay(),
                              m_eglConfig,
                              this);
    kdInstallCallback(kdProcessMouseEvents,KD_EVENT_INPUT_POINTER,this);
#ifdef KD_ATX_keyboard
    kdInstallCallback(kdProcessKeyEvents, KD_EVENT_INPUT_KEY_ATX,this);
#endif //KD_ATX_keyboard

    if (!m_kdWindow) {
        qErrnoWarning(kdGetError(), "Error creating native window");
        return;
    }

    KDboolean exclusive(false);
    if (kdSetWindowPropertybv(m_kdWindow,KD_WINDOWPROPERTY_DESKTOP_EXCLUSIVE_NV, &exclusive)) {
        isFullScreen = true;
    }

    if (isFullScreen) {
        tlw->setGeometry(screen->geometry());
        screen->setFullScreen(isFullScreen);
    }else {
        const KDint windowSize[2]  = { tlw->width(), tlw->height() };
        if (kdSetWindowPropertyiv(m_kdWindow, KD_WINDOWPROPERTY_SIZE, windowSize)) {
            qErrnoWarning(kdGetError(), "Could not set native window size");
        }
        KDboolean visibillity(false);
        if (kdSetWindowPropertybv(m_kdWindow, KD_WINDOWPROPERTY_VISIBILITY, &visibillity)) {
            qErrnoWarning(kdGetError(), "Could not set visibillity to false");
        }

        const KDint windowPos[2] = { tlw->x(), tlw->y() };
        if (kdSetWindowPropertyiv(m_kdWindow, KD_WINDOWPROPERTY_DESKTOP_OFFSET_NV, windowPos)) {
            qErrnoWarning(kdGetError(), "Could not set native window position");
            return;
        }
    }


    QOpenKODEIntegration *integration = static_cast<QOpenKODEIntegration *>(QApplicationPrivate::platformIntegration());

    if (!isFullScreen || (isFullScreen && !integration->mainGLContext())) {
        if (kdRealizeWindow(m_kdWindow, &m_eglWindow)) {
            qErrnoWarning(kdGetError(), "Could not realize native window");
            return;
        }

        EGLSurface surface = eglCreateWindowSurface(screen->eglDisplay(),m_eglConfig,m_eglWindow,m_eglWindowAttrs.constData());
        m_platformGlContext = new QEGLPlatformContext(screen->eglDisplay(), m_eglConfig,
                                                      m_eglContextAttrs.data(), surface, m_eglApi);
        integration->setMainGLContext(m_platformGLContext);
    } else {
        m_platformGlContext = integration->mainGLContext();
        kdDestroyWindow(m_kdWindow);
        m_kdWindow = 0;
    }
}

void QEglFSScreen::createAndSetPlatformContext()
{
    QPlatformWindowFormat platformFormat = QPlatformWindowFormat::defaultFormat();

    platformFormat.setWindowApi(QPlatformWindowFormat::OpenGL);

    QByteArray depthString = qgetenv("QT_QPA_EGLFS_DEPTH");
    if (depthString.toInt() == 16) {
        platformFormat.setDepth(16);
        platformFormat.setRedBufferSize(5);
        platformFormat.setGreenBufferSize(6);
        platformFormat.setBlueBufferSize(5);
        m_depth = 16;
        m_format = QImage::Format_RGB16;
    } else {
        platformFormat.setDepth(32);
        platformFormat.setRedBufferSize(8);
        platformFormat.setGreenBufferSize(8);
        platformFormat.setBlueBufferSize(8);
        m_depth = 32;
        m_format = QImage::Format_RGB32;
    }
    if (!qgetenv("QT_QPA_EGLFS_MULTISAMPLE").isEmpty()) {
        platformFormat.setSampleBuffers(true);
    }


    EGLConfig config = q_configFromQPlatformWindowFormat(m_dpy, platformFormat);

    EGLNativeWindowType eglWindow = 0;
#ifdef Q_OPENKODE
    if (kdInitializeNV() == KD_ENOTINITIALIZED) {
        qFatal("Did not manage to initialize openkode");
    }
    KDWindow *window = kdCreateWindow(m_dpy,config,0);

    kdRealizeWindow(window,&eglWindow);
#endif

    m_surface = eglCreateWindowSurface(m_dpy, config, eglWindow, NULL);
    if (m_surface == EGL_NO_SURFACE) {
        qWarning("Could not create the egl surface: error = 0x%x\n", eglGetError());
        eglTerminate(m_dpy);
        qFatal("EGL error");
    }
    //    qWarning("Created surface %dx%d\n", w, h);

#ifdef QEGL_EXTRA_DEBUG
    qWarning("Configuration %d matches requirements\n", (int)config);

    for (index = 0; attrs[index].attr != -1; ++index) {
        EGLint value;
        if (eglGetConfigAttrib(m_dpy, config, attrs[index].attr, &value)) {
            qWarning("\t%s: %d\n", attrs[index].name, (int)value);
        }
    }
    qWarning("\n");
#endif

    EGLint temp;
    EGLint attribList[32];

    temp = 0;

    attribList[temp++] = EGL_CONTEXT_CLIENT_VERSION;
    attribList[temp++] = 2; // GLES version 2
    attribList[temp++] = EGL_NONE;

    QEGLPlatformContext *platformContext = new QEGLPlatformContext(m_dpy,config,attribList,m_surface,EGL_OPENGL_ES_API);
    m_platformContext = platformContext;

    EGLint w,h;                    // screen size detection
    eglQuerySurface(m_dpy, m_surface, EGL_WIDTH, &w);
    eglQuerySurface(m_dpy, m_surface, EGL_HEIGHT, &h);

    m_geometry = QRect(0,0,w,h);

}