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Commit 6ec03528 authored by Ramkumar Radhakrishnan's avatar Ramkumar Radhakrishnan Committed by Steve Kondik
Browse files

frameworks/native: Add support for Secure Display 

- Add secure UI layers to primary and remove other layers from
  internal and external list for Secure Display usecase.
- Dont let secure UI layers to be captured on screen

Change-Id: Iebdad5c56247308604ee90928f6d6460a1f69279
parent ee9ae7b8

services/surfaceflinger/Layer.cpp

+12 −0
Original line number Diff line number Diff line
@@ -1292,6 +1292,18 @@ bool Layer::isIntOnly() const 
    }

    return false;

}



bool Layer::isSecureDisplay() const

{

    const sp<GraphicBuffer>& activeBuffer(mActiveBuffer);

    if (activeBuffer != 0) {

        uint32_t usage = activeBuffer->getUsage();

        if(usage & GRALLOC_USAGE_PRIVATE_SECURE_DISPLAY)

            return true;

    }

    return false;

}



#endif

// ---------------------------------------------------------------------------

}; // namespace android

services/surfaceflinger/Layer.h

+1 −0
Original line number Diff line number Diff line
@@ -266,6 +266,7 @@ public: 
#ifdef QCOM_BSP

    virtual bool isExtOnly() const;

    virtual bool isIntOnly() const;

    virtual bool isSecureDisplay() const;

#endif



    /*

services/surfaceflinger/SurfaceFlinger.cpp

+19 −4
Original line number Diff line number Diff line
@@ -1599,18 +1599,25 @@ void SurfaceFlinger::computeVisibleRegions(size_t dpy, 


    outDirtyRegion.clear();

    bool bIgnoreLayers = false;

    int extOnlyLayerIndex = -1;

    int indexLOI = -1;

    size_t i = currentLayers.size();

#ifdef QCOM_BSP

    while (i--) {

        const sp<Layer>& layer = currentLayers[i];

        // iterate through the layer list to find ext_only layers and store

        // the index

        if ((dpy && layer->isExtOnly())) {

        if (layer->isSecureDisplay()) {

            bIgnoreLayers = true;

            extOnlyLayerIndex = i;

            indexLOI = -1;

            if(!dpy)

                indexLOI = i;

            break;

        }



        if (dpy && layer->isExtOnly()) {

            bIgnoreLayers = true;

            indexLOI = i;

        }

    }

    i = currentLayers.size();

#endif
@@ -1624,7 +1631,9 @@ void SurfaceFlinger::computeVisibleRegions(size_t dpy, 
        // Only add the layer marked as "external_only" to external list and

        // only remove the layer marked as "external_only" from primary list

        // and do not add the layer marked as "internal_only" to external list

        if((bIgnoreLayers && extOnlyLayerIndex != (int)i) ||

        // Add secure UI layers to primary and remove other layers from internal

        //and external list

        if((bIgnoreLayers && indexLOI != (int)i) ||

           (!dpy && layer->isExtOnly()) ||

           (dpy && layer->isIntOnly())) {

            // Ignore all other layers except the layers marked as ext_only
@@ -3095,6 +3104,12 @@ void SurfaceFlinger::renderScreenImplLocked( 
        const Layer::State& state(layer->getDrawingState());

        if (state.layerStack == hw->getLayerStack()) {

            if (state.z >= minLayerZ && state.z <= maxLayerZ) {

#ifdef QCOM_BSP

                // dont render the secure Display Layer

                if(layer->isSecureDisplay()) {

                    continue;

                }

#endif

                if (layer->isVisible()) {

                    if (filtering) layer->setFiltering(true);

                    layer->draw(hw);