java修改图形属性_开发者选项 Disable HW overlays -> 分析-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_39783915/article/details/114659817

1.Disable HW overlays

1../packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java

setting得到SurfaceFlinger服务，通过binder发命令。

private void writeDisableOverlaysOption() {

try {

IBinder flinger = ServiceManager.getService("SurfaceFlinger");

if (flinger != null) {

Parcel data = Parcel.obtain();

data.writeInterfaceToken("android.ui.ISurfaceComposer");

final int disableOverlays = mDisableOverlays.isChecked() ? 1 : 0;

data.writeInt(disableOverlays);

flinger.transact(1008, data, null, 0);

data.recycle();

updateFlingerOptions();

}

} catch (RemoteException ex) {

}

2.SurfaceFlinger.cpp

SurfaceFlinger处理命令，置位相应的标志，重新画图。

case 1008: // toggle use of hw composer

n = data.readInt32();

mDebugDisableHWC = n ? 1 : 0;

invalidateHwcGeometry(); //mHwWorkListDirty = true;

repaintEverything();

return NO_ERROR;

3.SurfaceFlinger.cpp

重新画图。

void SurfaceFlinger::repaintEverything() {

android_atomic_or(1, &mRepaintEverything);

signalTransaction();

}

4. 4－6给队列发消息

void SurfaceFlinger::signalTransaction() {

mEventQueue.invalidate();

}

#define INVALIDATE_ON_VSYNC 1

void MessageQueue::invalidate() {

#if INVALIDATE_ON_VSYNC

mEvents->requestNextVsync();

#else

mHandler->dispatchInvalidate();

#endif

}

frameworks/native/services/surfaceflinger/MessageQueue.cpp

void MessageQueue::Handler::dispatchInvalidate() {

if ((android_atomic_or(eventMaskInvalidate, &mEventMask) & eventMaskInvalidate) == 0) {

mQueue.mLooper->sendMessage(this, Message(MessageQueue::INVALIDATE));

}

7.处理重画的消息

void SurfaceFlinger::onMessageReceived(int32_t what) {

ATRACE_CALL();

switch (what) {

case MessageQueue::INVALIDATE:

TF_PRINT(TF_EVENT_START, "SF", "Invalidate", "Composition invalidate start");

handleMessageTransaction();

handleMessageInvalidate();

signalRefresh();

TF_PRINT(TF_EVENT_STOP, "SF", "Invalidate", "Composition invalidate end");

break;

case MessageQueue::REFRESH:

TF_PRINT(TF_EVENT_START, "SF", "CompositionRefresh", "Composition refresh start");

handleMessageRefresh();

TF_PRINT(TF_EVENT_STOP, "SF", "CompositionRefresh", "Composition refresh end");

break;

}

8.图形属性大小、旋转方向没有发生变化，所以不会调用

void SurfaceFlinger::handleMessageTransaction() {

uint32_t transactionFlags = peekTransactionFlags(eTransactionMask);// transactionFlags=mTransactionFlags

if (transactionFlags) {// transactionFlags = false 所以不会走下边。

handleTransaction(transactionFlags);

}

9.重新计算可视区，mVisibleRegionsDirty推测是false.

void SurfaceFlinger::handleMessageInvalidate() {

ATRACE_CALL();

handlePageFlip();

}

void SurfaceFlinger::handlePageFlip()

{

Region dirtyRegion;

bool visibleRegions = false;

const LayerVector& currentLayers(mDrawingState.layersSortedByZ);

const size_t count = currentLayers.size();

for (size_t i=0 ; i

const sp& layer(currentLayers[i]);

const Region dirty(layer->latchBuffer(visibleRegions));

const Layer::State& s(layer->drawingState());

invalidateLayerStack(s.layerStack, dirty);

}

// ALOGE("visibleRegions =%s",visibleRegions ? "true" : "false"); false

mVisibleRegionsDirty |= visibleRegions;

}

10.

void SurfaceFlinger::handleMessageRefresh() {

ATRACE_CALL();

preComposition();

rebuildLayerStacks();

setUpHWComposer();

doDebugFlashRegions();

doComposition();

postComposition();

}

11.

void SurfaceFlinger::setUpHWComposer()

if (CC_UNLIKELY(mHwWorkListDirty)) {

ALOGE("test 718 setUpHWComposer mHwWorkListDirty==TURE");

mHwWorkListDirty = false;//保证只运行一次

if (mDebugDisableHWC || mDebugRegion) {

cur->setSkip(true);//设置HWC_SKIP_LAYER标志

}

status_t err = hwc.prepare();

virtual void setSkip(bool skip) {

if (skip) {

getLayer()->flags |= HWC_SKIP_LAYER;

} else {

getLayer()->flags &= ~HWC_SKIP_LAYER;

}

hwc.prepare();--------->status_t HWComposer::prepare()------------>int err = mHwc->prepare(mHwc, mNumDisplays, mLists);

12. hardware/qcom/display/libhwcomposer/hwc.cpp hwc_prepare

在updateLayerCache中，HWC_SKIP_LAYER和HWC_FRAMEBUFFER处理的方式不一样。why??

hardware/qcom/display/libhwcomposer/hwc.cpp

static int hwc_prepare_primary(hwc_composer_device_1 *dev,

hwc_display_contents_1_t *list)

ctx->mLayerCache[dpy]->updateLayerCache(list);

for(uint32_t i = 0; i < list->numHwLayers; i++) {

//Bail on skip layers

if(list->hwLayers[i].flags & HWC_SKIP_LAYER) {

resetLayerCache(list->numHwLayers);

return;

}

if(list->hwLayers[i].compositionType == HWC_FRAMEBUFFER) {

numFbLayers++;

if(hnd[i] == NULL) {

hnd[i] = list->hwLayers[i].handle;

} else if (hnd[i] ==

list->hwLayers[i].handle) {

numCacheableLayers++;

} else {

hnd[i] = NULL;

return;

}

} else {

hnd[i] = NULL;

}

void LayerCache::resetLayerCache(int num) {

for(uint32_t i = 0; i < MAX_NUM_LAYERS; i++) {

hnd[i] = NULL;

}

numHwLayers = num;

}

13.frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.cpp

把有HWC_SKIP_LAYER标志的层设置合成方式是HWC_FRAMEBUFFER

status_t HWComposer::prepare()

for (size_t i=0 ; inumHwLayers ; i++) {

hwc_layer_1_t& l = disp.list->hwLayers[i];

//ALOGD("prepare: %d, type=%d, handle=%p",

// i, l.compositionType, l.handle);

if (l.flags & HWC_SKIP_LAYER) {

ALOGE("test 718 HWComposer::prepare() HWC_SKIP_LAYER");

l.compositionType = HWC_FRAMEBUFFER;// HWC_SKIP_LAYER => HWC_FRAMEBUFFER

}

if (l.compositionType == HWC_FRAMEBUFFER) {

ALOGE("test 718 HWComposer::prepare() HWC_FRAMEBUFFER");

disp.hasFbComp = true;

}

if (l.compositionType == HWC_OVERLAY) {

disp.hasOvComp = true;

}

14.

SurfaceFlinger.cpp

void SurfaceFlinger::doComposeSurfaces(const sp& hw, const Region& dirty)

* and then, render the layers targeted at the framebuffer

const Vector< sp >& layers(hw->getVisibleLayersSortedByZ());

const size_t count = layers.size();

const Transform& tr = hw->getTransform();

if (cur != end) {

// we're using h/w composer

for (size_t i=0 ; i

const sp& layer(layers[i]);

const Region clip(dirty.intersect(tr.transform(layer->visibleRegion)));

if (!clip.isEmpty()) {

switch (cur->getCompositionType()) {

case HWC_OVERLAY: {

ALOGE("test 718 doComposeSurfaces case HWC_OVERLAY");

ALOGE("test 718 hasGlesComposition=%s",hasGlesComposition ? "true" : "false");

if ((cur->getHints() & HWC_HINT_CLEAR_FB)

&& i

&& layer->isOpaque()

&& hasGlesComposition) {

// never clear the very first layer since we're

// guaranteed the FB is already cleared

ALOGE("test 718 clear");

layer->clearWithOpenGL(hw, clip);

}

break;

}

case HWC_FRAMEBUFFER: {

ALOGE("test 718 doComposeSurfaces case HWC_FRAMEBUFFER");

layer->draw(hw, clip);

break;

case HWC_FRAMEBUFFER_TARGET: {

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

// let us get there.

ALOGW("HWC_FRAMEBUFFER_TARGET found in hwc list (index=%d)", i);

break;

}

layer->setAcquireFence(hw, *cur);

}

13.

当Disable HW overlays ,这个log‘test 718’会不停的打。如果不选，则不会打log。

if (l.flags & HWC_SKIP_LAYER) {

ALOGE("test 718 HWComposer::prepare() HWC_SKIP_LAYER");

l.compositionType = HWC_FRAMEBUFFER;

}

if (l.compositionType == HWC_FRAMEBUFFER) {

ALOGE("test 718 HWComposer::prepare() HWC_FRAMEBUFFER");

disp.hasFbComp = true;

}

if (l.compositionType == HWC_OVERLAY) {

disp.hasOvComp = true;

}

选中

D/CallStack( 275): #00 pc 00006f74 /system/lib/hw/hwcomposer.msm8960.so

D/CallStack( 275): #01 pc 00007248 /system/lib/hw/hwcomposer.msm8960.so

D/CallStack( 275): #02 pc 000233be /system/lib/libsurfaceflinger.so (android::HWComposer::prepare()+145)

D/CallStack( 275): #03 pc 00026710 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::setUpHWComposer()+363)

D/CallStack( 275): #04 pc 00029324 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::handleMessageRefresh()+39)

D/CallStack( 275): #05 pc 00029f7a /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::onMessageReceived(int)+57)

D/CallStack( 275): #06 pc 00014c70 /system/lib/libutils.so (android::Looper::pollInner(int)+423)

D/CallStack( 275): #07 pc 00014d90 /system/lib/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+103)

D/CallStack( 275): #08 pc 00024894 /system/lib/libsurfaceflinger.so (android::MessageQueue::waitMessage()+39)

D/CallStack( 275): #09 pc 00024e80 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::threadLoop()+5)

D/CallStack( 275): #10 pc 00011264 /system/lib/libutils.so (android::Thread::_threadLoop(void*)+111)

D/CallStack( 275): #11 pc 00010dca /system/lib/libutils.so

D/CallStack( 275): #12 pc 0000e4f8 /system/lib/libc.so (__thread_entry+72)

D/CallStack( 275): #13 pc 0000dbe4 /system/lib/libc.so (pthread_create+160)

E/qdhwcomposer( 275): test 718 hwc_prepare_primary MDPcomp fails

E/qdhwcomposer( 275): test 718 updateLayerCache HWC_SKIP_LAYER

E/qdhwcomposer( 275): test 718 hwc_prepare_primary mCopyBit

E/SurfaceFlinger( 275): test 718 HWComposer::prepare() HWC_SKIP_LAYER

E/SurfaceFlinger( 275): test 718 HWComposer::prepare() HWC_FRAMEBUFFER

E/SurfaceFlinger( 275): test 718 HWComposer::prepare() HWC_SKIP_LAYER

E/SurfaceFlinger( 275): test 718 HWComposer::prepare() HWC_FRAMEBUFFER

E/SurfaceFlinger( 275): test 718 HWComposer::prepare() HWC_SKIP_LAYER

E/SurfaceFlinger( 275): test 718 HWComposer::prepare() HWC_FRAMEBUFFER

// prepare结束，就是清cache的时候，用到了HWC_SKIP_LAYER。

目的把HWC_SKIP_LAYER，变为HWC_FRAMEBUFFER属性。disp.hasFbComp表示有FB合成。

D/CallStack( 276): #00 pc 00025ccc /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::doComposeSurfaces(android::sp<:displaydevice const> const&, android::Region const&)+23)

D/CallStack( 276): #01 pc 00026014 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::doDisplayComposition(android::sp<:displaydevice const> const&, android::Region const&)+123)

D/CallStack( 276): #02 pc 000290ac /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::doComposition()+95)

D/CallStack( 276): #03 pc 00029318 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::handleMessageRefresh()+51)

D/CallStack( 276): #04 pc 00029f62 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::onMessageReceived(int)+57)

D/CallStack( 276): #05 pc 00014c70 /system/lib/libutils.so (android::Looper::pollInner(int)+423)

D/CallStack( 276): #06 pc 00014d90 /system/lib/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+103)

D/CallStack( 276): #07 pc 00024894 /system/lib/libsurfaceflinger.so (android::MessageQueue::waitMessage()+39)

D/CallStack( 276): #08 pc 00024e80 /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::threadLoop()+5)

D/CallStack( 276): #09 pc 00011264 /system/lib/libutils.so (android::Thread::_threadLoop(void*)+111)

D/CallStack( 276): #10 pc 00010dca /system/lib/libutils.so

D/CallStack( 276): #11 pc 0000e4f8 /system/lib/libc.so (__thread_entry+72)

D/CallStack( 276): #12 pc 0000dbe4 /system/lib/libc.so (pthread_create+160)

E/SurfaceFlinger( 276): test 718 doComposeSurfaces case HWC_FRAMEBUFFER