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Commit 4f089f88 authored by Arun Kumar K.R's avatar Arun Kumar K.R Committed by Steve Kondik
Browse files

SurfaceFlinger: Change to support framebuffer flip for 2D blitters 

- Surfaceflinger does not flip framebuffers when there are
  no layers marked for HWC_FRAMEBUFFER
- This change checks for the HWC_BLIT flag and will request a flip
  to a new FB_TARGET buffer even if there are no FRAMEBUFFER layers

Change-Id: I1cb44389a05c9ec049d7f0d39c288feccb11a91c
parent a0fc6cea

services/surfaceflinger/DisplayHardware/HWComposer.cpp

+6 −0
Original line number Diff line number Diff line
@@ -796,6 +796,11 @@ status_t HWComposer::prepare() { 
                    if (l.compositionType == HWC_FRAMEBUFFER) {

                        disp.hasFbComp = true;

                    }

                    // If the composition type is BLIT, we set this to

                    // trigger a FLIP

                    if(l.compositionType == HWC_BLIT) {

                        disp.hasFbComp = true;

                    }

                    if (l.compositionType == HWC_OVERLAY) {

                        disp.hasOvComp = true;

                    }
@@ -1325,6 +1330,7 @@ void HWComposer::dump(String8& result) const { 
                            "HWC",

                            "BACKGROUND",

                            "FB TARGET",

                            "FB_BLIT",

                            "UNKNOWN"};

                    if (type >= NELEM(compositionTypeName))

                        type = NELEM(compositionTypeName) - 1;

services/surfaceflinger/Layer.cpp

+2 −1
Original line number Diff line number Diff line
@@ -444,7 +444,8 @@ void Layer::setAcquireFence(const sp<const DisplayDevice>& hw, 
    // TODO: there is a possible optimization here: we only need to set the

    // acquire fence the first time a new buffer is acquired on EACH display.



    if (layer.getCompositionType() == HWC_OVERLAY) {

    if (layer.getCompositionType() == HWC_OVERLAY ||

            layer.getCompositionType() == HWC_BLIT) {

        sp<Fence> fence = mSurfaceFlingerConsumer->getCurrentFence();

        if (fence->isValid()) {

            fenceFd = fence->dup();

services/surfaceflinger/SurfaceFlinger.cpp

+3 −0
Original line number Diff line number Diff line
@@ -1944,6 +1944,9 @@ void SurfaceFlinger::doComposeSurfaces(const sp<const DisplayDevice>& hw, const 
                        layer->draw(hw, clip);

                        break;

                    }

                    case HWC_BLIT:

                        //Do nothing

                        break;

                    case HWC_FRAMEBUFFER_TARGET: {

                        // this should not happen as the iterator shouldn't

                        // let us get there.