bool FBUpdateLowRes::preRotateExtDisplay(hwc_context_t *ctx,
                                            hwc_layer_1_t *layer,
                                            ovutils::Whf &info,
                                            hwc_rect_t& sourceCrop,
                                            ovutils::eMdpFlags& mdpFlags,
                                            int& rotFlags)
{
    int extOrient = getExtOrientation(ctx);
    ovutils::eTransform orient = static_cast<ovutils::eTransform >(extOrient);

    if(mDpy && (extOrient & HWC_TRANSFORM_ROT_90)) {
        mRot = ctx->mRotMgr->getNext();
        if(mRot == NULL) return false;
        Whf origWhf(mAlignedFBWidth, mAlignedFBHeight,
                    getMdpFormat(HAL_PIXEL_FORMAT_RGBA_8888));
        //Configure rotator for pre-rotation
        if(configRotator(mRot, info, origWhf, mdpFlags, orient, 0) < 0) {
            ALOGE("%s: configRotator Failed!", __FUNCTION__);
            mRot = NULL;
            return false;
        }
       ctx->mLayerRotMap[mDpy]->add(layer, mRot);
        info.format = (mRot)->getDstFormat();
        updateSource(orient, info, sourceCrop);
        rotFlags |= ovutils::ROT_PREROTATED;
    }
    return true;
}
// This function returns corresponding tile format
// MDSS support following RGB tile formats
//  32 bit formats
//  16 bit formats
int getMdpFormat(int format, bool tileEnabled)
{
    if(!tileEnabled) {
        return getMdpFormat(format);
    }
    switch (format) {
        case HAL_PIXEL_FORMAT_RGBA_8888 :
            return MDP_RGBA_8888_TILE;
        case HAL_PIXEL_FORMAT_RGBX_8888:
            return MDP_RGBX_8888_TILE;
        case HAL_PIXEL_FORMAT_RGB_565:
            return MDP_RGB_565_TILE;
        case HAL_PIXEL_FORMAT_BGRA_8888:
            return MDP_BGRA_8888_TILE;
        case HAL_PIXEL_FORMAT_BGRX_8888:
            return MDP_BGRX_8888_TILE;
        default:
            return getMdpFormat(format);
    }
}
int configureLowRes(hwc_context_t *ctx, hwc_layer_1_t *layer,
        const int& dpy, eMdpFlags& mdpFlags, const eZorder& z,
        const eIsFg& isFg, const eDest& dest, Rotator **rot) {

    private_handle_t *hnd = (private_handle_t *)layer->handle;
    if(!hnd) {
        ALOGE("%s: layer handle is NULL", __FUNCTION__);
        return -1;
    }

    MetaData_t *metadata = (MetaData_t *)hnd->base_metadata;

    hwc_rect_t crop = layer->sourceCrop;
    hwc_rect_t dst = layer->displayFrame;
    int transform = layer->transform;
    eTransform orient = static_cast<eTransform>(transform);
    int downscale = 0;
    int rotFlags = ovutils::ROT_FLAGS_NONE;
    Whf whf(getWidth(hnd), getHeight(hnd),
            getMdpFormat(hnd->format), hnd->size);
    bool forceRot = false;

    if(isYuvBuffer(hnd) && ctx->mMDP.version >= qdutils::MDP_V4_2 &&
       ctx->mMDP.version < qdutils::MDSS_V5) {
        downscale =  getDownscaleFactor(
            crop.right - crop.left,
            crop.bottom - crop.top,
            dst.right - dst.left,
            dst.bottom - dst.top);
        if(downscale) {
            rotFlags = ROT_DOWNSCALE_ENABLED;
        }
        unsigned int& prevWidth = ctx->mPrevWHF[dpy].w;
        unsigned int& prevHeight = ctx->mPrevWHF[dpy].h;
        if(prevWidth != (uint32_t)getWidth(hnd) ||
               prevHeight != (uint32_t)getHeight(hnd)) {
            uint32_t prevBufArea = (prevWidth * prevHeight);
            if(prevBufArea) {
                forceRot = true;
            }
            prevWidth = (uint32_t)getWidth(hnd);
            prevHeight = (uint32_t)getHeight(hnd);
        }
    }

    setMdpFlags(layer, mdpFlags, downscale);
    trimLayer(ctx, dpy, transform, crop, dst);

    if(isYuvBuffer(hnd) && //if 90 component or downscale, use rot
            ((transform & HWC_TRANSFORM_ROT_90) || downscale || forceRot)) {
        *rot = ctx->mRotMgr->getNext();
        if(*rot == NULL) return -1;
        //Configure rotator for pre-rotation
        Whf origWhf(hnd->width, hnd->height,
                    getMdpFormat(hnd->format), hnd->size);
        if(configRotator(*rot, whf, origWhf,  mdpFlags, orient, downscale) < 0)
            return -1;
        ctx->mLayerRotMap[dpy]->add(layer, *rot);
        whf.format = (*rot)->getDstFormat();
        updateSource(orient, whf, crop);
        rotFlags |= ovutils::ROT_PREROTATED;
    }

    //For the mdp, since either we are pre-rotating or MDP does flips
    orient = OVERLAY_TRANSFORM_0;
    transform = 0;

    PipeArgs parg(mdpFlags, whf, z, isFg,
                  static_cast<eRotFlags>(rotFlags), layer->planeAlpha,
                  (ovutils::eBlending) getBlending(layer->blending));

    if(configMdp(ctx->mOverlay, parg, orient, crop, dst, metadata, dest) < 0) {
        ALOGE("%s: commit failed for low res panel", __FUNCTION__);
        ctx->mLayerRotMap[dpy]->reset();
        return -1;
    }
    return 0;
}
int configureHighRes(hwc_context_t *ctx, hwc_layer_1_t *layer,
        const int& dpy, eMdpFlags& mdpFlagsL, const eZorder& z,
        const eIsFg& isFg, const eDest& lDest, const eDest& rDest,
        Rotator **rot) {
    private_handle_t *hnd = (private_handle_t *)layer->handle;
    if(!hnd) {
        ALOGE("%s: layer handle is NULL", __FUNCTION__);
        return -1;
    }

    MetaData_t *metadata = (MetaData_t *)hnd->base_metadata;

    int hw_w = ctx->dpyAttr[dpy].xres;
    int hw_h = ctx->dpyAttr[dpy].yres;
    hwc_rect_t crop = layer->sourceCrop;
    hwc_rect_t dst = layer->displayFrame;
    int transform = layer->transform;
    eTransform orient = static_cast<eTransform>(transform);
    const int downscale = 0;
    int rotFlags = ROT_FLAGS_NONE;

    Whf whf(getWidth(hnd), getHeight(hnd),
            getMdpFormat(hnd->format), hnd->size);

    setMdpFlags(layer, mdpFlagsL);
    trimLayer(ctx, dpy, transform, crop, dst);

    if(isYuvBuffer(hnd) && (transform & HWC_TRANSFORM_ROT_90)) {
        (*rot) = ctx->mRotMgr->getNext();
        if((*rot) == NULL) return -1;
        //Configure rotator for pre-rotation
        Whf origWhf(hnd->width, hnd->height,
                    getMdpFormat(hnd->format), hnd->size);
        if(configRotator(*rot, whf, origWhf, mdpFlagsL, orient, downscale) < 0)
            return -1;
        ctx->mLayerRotMap[dpy]->add(layer, *rot);
        whf.format = (*rot)->getDstFormat();
        updateSource(orient, whf, crop);
        rotFlags |= ROT_PREROTATED;
    }

    eMdpFlags mdpFlagsR = mdpFlagsL;
    setMdpFlags(mdpFlagsR, OV_MDSS_MDP_RIGHT_MIXER);

    hwc_rect_t tmp_cropL, tmp_dstL;
    hwc_rect_t tmp_cropR, tmp_dstR;

    if(lDest != OV_INVALID) {
        tmp_cropL = crop;
        tmp_dstL = dst;
        hwc_rect_t scissor = {0, 0, hw_w/2, hw_h };
        qhwc::calculate_crop_rects(tmp_cropL, tmp_dstL, scissor, 0);
    }
    if(rDest != OV_INVALID) {
        tmp_cropR = crop;
        tmp_dstR = dst;
        hwc_rect_t scissor = {hw_w/2, 0, hw_w, hw_h };
        qhwc::calculate_crop_rects(tmp_cropR, tmp_dstR, scissor, 0);
    }

    //When buffer is flipped, contents of mixer config also needs to swapped.
    //Not needed if the layer is confined to one half of the screen.
    //If rotator has been used then it has also done the flips, so ignore them.
    if((orient & OVERLAY_TRANSFORM_FLIP_V) && lDest != OV_INVALID
            && rDest != OV_INVALID && rot == NULL) {
        hwc_rect_t new_cropR;
        new_cropR.left = tmp_cropL.left;
        new_cropR.right = new_cropR.left + (tmp_cropR.right - tmp_cropR.left);

        hwc_rect_t new_cropL;
        new_cropL.left  = new_cropR.right;
        new_cropL.right = tmp_cropR.right;

        tmp_cropL.left =  new_cropL.left;
        tmp_cropL.right =  new_cropL.right;

        tmp_cropR.left = new_cropR.left;
        tmp_cropR.right =  new_cropR.right;

    }

    //For the mdp, since either we are pre-rotating or MDP does flips
    orient = OVERLAY_TRANSFORM_0;
    transform = 0;

    //configure left mixer
    if(lDest != OV_INVALID) {
        PipeArgs pargL(mdpFlagsL, whf, z, isFg,
                       static_cast<eRotFlags>(rotFlags), layer->planeAlpha,
                       (ovutils::eBlending) getBlending(layer->blending));

        if(configMdp(ctx->mOverlay, pargL, orient,
                tmp_cropL, tmp_dstL, metadata, lDest) < 0) {
            ALOGE("%s: commit failed for left mixer config", __FUNCTION__);
            return -1;
        }
    }

    //configure right mixer
    if(rDest != OV_INVALID) {
        PipeArgs pargR(mdpFlagsR, whf, z, isFg,
                static_cast<eRotFlags>(rotFlags), layer->planeAlpha,
                (ovutils::eBlending) getBlending(layer->blending));

        tmp_dstR.right = tmp_dstR.right - tmp_dstR.left;
        tmp_dstR.left = 0;
        if(configMdp(ctx->mOverlay, pargR, orient,
                tmp_cropR, tmp_dstR, metadata, rDest) < 0) {
            ALOGE("%s: commit failed for right mixer config", __FUNCTION__);
            return -1;
        }
    }

    return 0;
}