Ejemplo n.º 1
0
void QMinimalEglScreen::createAndSetPlatformContext()
{
    QSurfaceFormat platformFormat;

    QByteArray depthString = qgetenv("QT_QPA_EGLFS_DEPTH");
    if (depthString.toInt() == 16) {
        platformFormat.setDepthBufferSize(16);
        platformFormat.setRedBufferSize(5);
        platformFormat.setGreenBufferSize(6);
        platformFormat.setBlueBufferSize(5);
        m_depth = 16;
        m_format = QImage::Format_RGB16;
    } else {
        platformFormat.setDepthBufferSize(24);
        platformFormat.setStencilBufferSize(8);
        platformFormat.setRedBufferSize(8);
        platformFormat.setGreenBufferSize(8);
        platformFormat.setBlueBufferSize(8);
        m_depth = 32;
        m_format = QImage::Format_RGB32;
    }

    if (!qEnvironmentVariableIsEmpty("QT_QPA_EGLFS_MULTISAMPLE"))
        platformFormat.setSamples(4);

    EGLConfig config = q_configFromGLFormat(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

#ifdef QEGL_EXTRA_DEBUG
    q_printEglConfig(m_dpy, config);
#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);

    QEGLPlatformContext *platformContext = new QMinimalEglContext(platformFormat, 0, m_dpy);
    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);

}
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().
}