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****************************************************************************/

#include "qgl.h"

#include <private/qt_x11_p.h>

#include <private/qpixmap_x11_p.h>

#include <private/qgl_p.h>

#include <private/qpaintengine_opengl_p.h>

#include "qgl_egl_p.h"

#include "qcolormap.h"

#include <QDebug>

QT_BEGIN_NAMESPACE

bool QGLFormat::hasOpenGLOverlays()

{

    return false;

}

void qt_egl_add_platform_config(QEglProperties& props, QPaintDevice *device)

{

    if (device->devType() == QInternal::Image)

        props.setPixelFormat(static_cast<QImage *>(device)->format());

}

bool QGLContext::chooseContext(const QGLContext* shareContext)

{

    Q_D(QGLContext);

    if (!device())

        return false;

    int devType = device()->devType();

    // Get the display and initialize it.

    }

    // Inform the higher layers about the actual format properties.

    qt_egl_update_format(*(d->eglContext), d->glFormat);

    return true;

}

void QGLWidget::resizeEvent(QResizeEvent *)

{

    Q_D(QGLWidget);

    if (!isValid())

        return;

    makeCurrent();

    if (!d->glcx->initialized())

        glInit();

    resizeGL(width(), height());

    //handle overlay

}

const QGLContext* QGLWidget::overlayContext() const

{

    return 0;

}

void QGLWidget::makeOverlayCurrent()

{

    //handle overlay

}

void QGLWidget::updateOverlayGL()

{

    //handle overlay

}

bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig config, const QX11Info &x11Info, bool useArgbVisual)

{

    bool foundVisualIsArgb = useArgbVisual;

    memset(&vi, 0, sizeof(XVisualInfo));

    // Check to see if EGL is suggesting an appropriate visual id:

    EGLint nativeVisualId;

    eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &nativeVisualId);

    vi.visualid = nativeVisualId;

    if (vi.visualid) {

        // EGL has suggested a visual id, so get the rest of the visual info for that id:

        XVisualInfo *chosenVisualInfo;

        int matchingCount = 0;

        chosenVisualInfo = XGetVisualInfo(x11Info.display(), VisualIDMask, &vi, &matchingCount);

        if (chosenVisualInfo) {

#if !defined(QT_NO_XRENDER)

            if (useArgbVisual) {

                // Check to make sure the visual provided by EGL is ARGB

                XRenderPictFormat *format;

                format = XRenderFindVisualFormat(x11Info.display(), chosenVisualInfo->visual);

                if (format->type == PictTypeDirect && format->direct.alphaMask) {

                    foundVisualIsArgb = true;

                    vi = *chosenVisualInfo;

                }

                else {

                    qWarning("Warning: EGL suggested using X visual ID %d for config %d, but this is not ARGB",

                             nativeVisualId, (int)config);

                    vi.visualid = 0;

                }

            } else

#endif

            {

            }

            XFree(chosenVisualInfo);

        }

        else {

            qWarning("Warning: EGL suggested using X visual ID %d for config %d, but this seems to be invalid!",

                     nativeVisualId, (int)config);

            vi.visualid = 0;

        }

    }

    // If EGL does not know the visual ID, so try to select an appropriate one ourselves, first

    // using XRender if we're supposed to have an alpha, then falling back to XGetVisualInfo

#if !defined(QT_NO_XRENDER)

    if (vi.visualid == 0 && useArgbVisual) {

        // Try to use XRender to find an ARGB visual we can use

        vi.screen  = x11Info.screen();

        vi.depth   = 32; //### We might at some point (soon) get ARGB4444

        vi.c_class = TrueColor;

        XVisualInfo *matchingVisuals;

        int matchingCount = 0;

        matchingVisuals = XGetVisualInfo(x11Info.display(),

                                         VisualScreenMask|VisualDepthMask|VisualClassMask,

                                         &vi, &matchingCount);

        for (int i = 0; i < matchingCount; ++i) {

            XRenderPictFormat *format;

            format = XRenderFindVisualFormat(x11Info.display(), matchingVisuals[i].visual);

            if (format->type == PictTypeDirect && format->direct.alphaMask) {

                vi = matchingVisuals[i];

                foundVisualIsArgb = true;

                break;

            }

        }

        XFree(matchingVisuals);

    }

#endif

    if (vi.visualid == 0) {

        EGLint depth;

        eglGetConfigAttrib(display, config, EGL_BUFFER_SIZE, &depth);

        int err;

        err = XMatchVisualInfo(x11Info.display(), x11Info.screen(), depth, TrueColor, &vi);

        if (err == 0) {

            qWarning("Warning: Can't find an X visual which matches the EGL config(%d)'s depth (%d)!",

                     (int)config, depth);

            depth = x11Info.depth();

            err = XMatchVisualInfo(x11Info.display(), x11Info.screen(), depth, TrueColor, &vi);

            if (err == 0) {

                qWarning("Error: Couldn't get any matching X visual!");

                return false;

            } else

                qWarning("         - Falling back to X11 suggested depth (%d)", depth);

        }

        // Don't try to use ARGB now unless the visual is 32-bit - even then it might stil fail :-(

        if (useArgbVisual)

            foundVisualIsArgb = vi.depth == 32; //### We might at some point (soon) get ARGB4444

    }

    return foundVisualIsArgb;

}

void QGLWidget::setContext(QGLContext *context, const QGLContext* shareContext, bool deleteOldContext)

{

    Q_D(QGLWidget);

    if (context == 0) {

        qWarning("QGLWidget::setContext: Cannot set null context");

        return;

    }

    if (!context->deviceIsPixmap() && context->device() != this) {

        qWarning("QGLWidget::setContext: Context must refer to this widget");

        return;

    }

    if (d->glcx)

        d->glcx->doneCurrent();

    QGLContext* oldcx = d->glcx;

    d->glcx = context;

    if (parentWidget()) {

        // force creation of delay-created widgets

        parentWidget()->winId();

        if (parentWidget()->x11Info().screen() != x11Info().screen())

            d_func()->xinfo = parentWidget()->d_func()->xinfo;

    }

    // If the application has set WA_TranslucentBackground and not explicitly set

    // the alpha buffer size to zero, modify the format so it have an alpha channel

    QGLFormat& fmt = d->glcx->d_func()->glFormat;

    if (tryArgbVisual && fmt.alphaBufferSize() == -1)

        fmt.setAlphaBufferSize(1);

    bool createFailed = false;

    if (!d->glcx->isValid()) {

        if (!d->glcx->create(shareContext ? shareContext : oldcx))

            createFailed = true;

    }

    if (createFailed) {

        if (deleteOldContext)

            delete oldcx;

        return;

    }

    if (d->glcx->windowCreated() || d->glcx->deviceIsPixmap()) {

        if (deleteOldContext)

            delete oldcx;

        return;

    }

    bool visible = isVisible();

    if (visible)

        hide();

    XVisualInfo vi;

    QEglContext *eglContext = d->glcx->d_func()->eglContext;

    bool usingArgbVisual = qt_egl_setup_x11_visual(vi, eglContext->display(), eglContext->config(),

                                                   x11Info(), tryArgbVisual);

    XSetWindowAttributes a;

    Window p = RootWindow(x11Info().display(), x11Info().screen());

    if (parentWidget())

        p = parentWidget()->winId();

    QColormap colmap = QColormap::instance(vi.screen);

    a.background_pixel = colmap.pixel(palette().color(backgroundRole()));

    a.border_pixel = colmap.pixel(Qt::black);

    unsigned int valueMask = CWBackPixel|CWBorderPixel;

    if (usingArgbVisual) {

        a.colormap = XCreateColormap(x11Info().display(), p, vi.visual, AllocNone);

        valueMask |= CWColormap;

    }

    Window w = XCreateWindow(x11Info().display(), p, x(), y(), width(), height(),

                             0, vi.depth, InputOutput, vi.visual, valueMask, &a);

    if (deleteOldContext)

        delete oldcx;

    oldcx = 0;

    create(w); // Create with the ID of the window we've just created

    // Create the EGL surface to draw into.

    QGLContextPrivate *ctxpriv = d->glcx->d_func();

    ctxpriv->eglSurface = ctxpriv->eglContext->createSurface(this);

    if (ctxpriv->eglSurface == EGL_NO_SURFACE) {

        delete ctxpriv->eglContext;

        ctxpriv->eglContext = 0;

        return;

    }

    d->eglSurfaceWindowId = w; // Remember the window id we created the surface for

    if (visible)

        show();

    XFlush(X11->display);

    d->glcx->setWindowCreated(true);

}

void QGLWidgetPrivate::init(QGLContext *context, const QGLWidget* shareWidget)

{

    Q_Q(QGLWidget);

    initContext(context, shareWidget);

    if(q->isValid() && glcx->format().hasOverlay()) {

        //no overlay

        qWarning("QtOpenGL ES doesn't currently support overlays");

    }

}

void QGLWidgetPrivate::cleanupColormaps()

{

}

const QGLColormap & QGLWidget::colormap() const

{

    return d_func()->cmap;

}

void QGLWidget::setColormap(const QGLColormap &)

{

}

void QGLExtensions::init()

{

    static bool init_done = false;

    if (init_done)

        return;

    init_done = true;

    // We need a context current to initialize the extensions.

    QGLWidget tmpWidget;

    tmpWidget.makeCurrent();

    init_extensions();

    tmpWidget.doneCurrent();

}

// Re-creates the EGL surface if the window ID has changed or if force is true

void QGLWidgetPrivate::recreateEglSurface(bool force)

{

    Q_Q(QGLWidget);

    Window currentId = q->winId();

    if ( force || (currentId != eglSurfaceWindowId) ) {

        // The window id has changed so we need to re-create the EGL surface

        QEglContext *ctx = glcx->d_func()->eglContext;

        EGLSurface surface = glcx->d_func()->eglSurface;

        if (surface != EGL_NO_SURFACE)

            ctx->destroySurface(surface); // Will force doneCurrent() if nec.

        surface = ctx->createSurface(q);

        if (surface == EGL_NO_SURFACE)

            qWarning("Error creating EGL window surface: 0x%x", eglGetError());

        glcx->d_func()->eglSurface = surface;

        eglSurfaceWindowId = currentId;

    }

}

// Selects which configs should be used

EGLConfig Q_OPENGL_EXPORT qt_chooseEGLConfigForPixmap(bool hasAlpha, bool readOnly)

{

    // Cache the configs we select as they wont change:

    static EGLConfig roPixmapRGBConfig = 0;

    static EGLConfig roPixmapRGBAConfig = 0;

    static EGLConfig rwPixmapRGBConfig = 0;

    static EGLConfig rwPixmapRGBAConfig = 0;

    EGLConfig* targetConfig;

    if (hasAlpha) {

        if (readOnly)

            targetConfig = &roPixmapRGBAConfig;

        else

            targetConfig = &rwPixmapRGBAConfig;

    }

    else {

        if (readOnly)

            targetConfig = &roPixmapRGBConfig;

        else

            targetConfig = &rwPixmapRGBConfig;

    }

    if (*targetConfig == 0) {

        QEglProperties configAttribs;

        configAttribs.setValue(EGL_SURFACE_TYPE, EGL_PIXMAP_BIT);

        configAttribs.setRenderableType(QEgl::OpenGL);

        if (hasAlpha)

            configAttribs.setValue(EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE);

        else

            configAttribs.setValue(EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE);

        // If this is going to be a render target, it needs to have a depth, stencil & sample buffer

        if (!readOnly) {

            configAttribs.setValue(EGL_DEPTH_SIZE, 1);

            configAttribs.setValue(EGL_STENCIL_SIZE, 1);

            configAttribs.setValue(EGL_SAMPLE_BUFFERS, 1);

        }

        EGLint configCount = 0;