SF: Refactor processDisplayChangesLocked()
This change introduces three new functions:
* processAddedDisplay()
* processRemovedDisplay()
* processChangedDisplay()
and refactors processDisplayChangesLocked(). Where code reuse
is required the appropriate function is called.
Context:
SurfaceFlinger::processDisplayChangesLocked() is a 150 line
function, which does a non-trivial iteration of mCurrentState
and mDisplayState, detects added, removed and changed displays
and executes the corresponding logic to handle the changes.
Currently if the surface of a display is different in curr and
drawing state the code is destroying and recreatig the display
object. The logic for display (re)creation is reused by playing
with the iterator (skipping i++) and modifying the iterated
collection (mDrawingState). This makes the code unnecessary
complex and unreadable.
Bug: 143451809
Test: flash device and check it boots
Test: atest libsurfaceflinger_unittest
Change-Id: I03afda7c1807ab36f8e03e7a4e43c804b3199149
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index f97580a..2294a99 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2387,13 +2387,14 @@
sp<DisplayDevice> SurfaceFlinger::setupNewDisplayDeviceInternal(
const wp<IBinder>& displayToken,
std::shared_ptr<compositionengine::Display> compositionDisplay,
- const DisplayDeviceState& state, const sp<compositionengine::DisplaySurface>& dispSurface,
+ const DisplayDeviceState& state,
+ const sp<compositionengine::DisplaySurface>& displaySurface,
const sp<IGraphicBufferProducer>& producer) {
auto displayId = compositionDisplay->getDisplayId();
DisplayDeviceCreationArgs creationArgs(this, displayToken, compositionDisplay);
creationArgs.sequenceId = state.sequenceId;
creationArgs.isSecure = state.isSecure;
- creationArgs.displaySurface = dispSurface;
+ creationArgs.displaySurface = displaySurface;
creationArgs.hasWideColorGamut = false;
creationArgs.supportedPerFrameMetadata = 0;
@@ -2469,6 +2470,140 @@
return display;
}
+void SurfaceFlinger::processDisplayAdded(const wp<IBinder>& displayToken,
+ const DisplayDeviceState& state) {
+ int width = 0;
+ int height = 0;
+ ui::PixelFormat pixelFormat = static_cast<ui::PixelFormat>(PIXEL_FORMAT_UNKNOWN);
+ if (state.physical) {
+ const auto& activeConfig =
+ getCompositionEngine().getHwComposer().getActiveConfig(state.physical->id);
+ width = activeConfig->getWidth();
+ height = activeConfig->getHeight();
+ pixelFormat = static_cast<ui::PixelFormat>(PIXEL_FORMAT_RGBA_8888);
+ } else if (state.surface != nullptr) {
+ int status = state.surface->query(NATIVE_WINDOW_WIDTH, &width);
+ ALOGE_IF(status != NO_ERROR, "Unable to query width (%d)", status);
+ status = state.surface->query(NATIVE_WINDOW_HEIGHT, &height);
+ ALOGE_IF(status != NO_ERROR, "Unable to query height (%d)", status);
+ int intPixelFormat;
+ status = state.surface->query(NATIVE_WINDOW_FORMAT, &intPixelFormat);
+ ALOGE_IF(status != NO_ERROR, "Unable to query format (%d)", status);
+ pixelFormat = static_cast<ui::PixelFormat>(intPixelFormat);
+ } else {
+ // Virtual displays without a surface are dormant:
+ // they have external state (layer stack, projection,
+ // etc.) but no internal state (i.e. a DisplayDevice).
+ return;
+ }
+
+ compositionengine::DisplayCreationArgsBuilder builder;
+ if (const auto& physical = state.physical) {
+ builder.setPhysical({physical->id, physical->type});
+ }
+ builder.setPixels(ui::Size(width, height));
+ builder.setPixelFormat(pixelFormat);
+ builder.setIsSecure(state.isSecure);
+ builder.setLayerStackId(state.layerStack);
+ builder.setPowerAdvisor(&mPowerAdvisor);
+ builder.setUseHwcVirtualDisplays(mUseHwcVirtualDisplays || getHwComposer().isUsingVrComposer());
+ builder.setName(state.displayName);
+ const auto compositionDisplay = getCompositionEngine().createDisplay(builder.build());
+
+ sp<compositionengine::DisplaySurface> displaySurface;
+ sp<IGraphicBufferProducer> producer;
+ sp<IGraphicBufferProducer> bqProducer;
+ sp<IGraphicBufferConsumer> bqConsumer;
+ getFactory().createBufferQueue(&bqProducer, &bqConsumer, /*consumerIsSurfaceFlinger =*/false);
+
+ std::optional<DisplayId> displayId = compositionDisplay->getId();
+
+ if (state.isVirtual()) {
+ sp<VirtualDisplaySurface> vds =
+ new VirtualDisplaySurface(getHwComposer(), displayId, state.surface, bqProducer,
+ bqConsumer, state.displayName);
+
+ displaySurface = vds;
+ producer = vds;
+ } else {
+ ALOGE_IF(state.surface != nullptr,
+ "adding a supported display, but rendering "
+ "surface is provided (%p), ignoring it",
+ state.surface.get());
+
+ LOG_ALWAYS_FATAL_IF(!displayId);
+ displaySurface = new FramebufferSurface(getHwComposer(), *displayId, bqConsumer,
+ maxGraphicsWidth, maxGraphicsHeight);
+ producer = bqProducer;
+ }
+
+ if (displaySurface != nullptr) {
+ mDisplays.emplace(displayToken,
+ setupNewDisplayDeviceInternal(displayToken, compositionDisplay, state,
+ displaySurface, producer));
+ if (!state.isVirtual()) {
+ LOG_ALWAYS_FATAL_IF(!displayId);
+ dispatchDisplayHotplugEvent(displayId->value, true);
+ }
+
+ const auto displayDevice = mDisplays[displayToken];
+ if (displayDevice->isPrimary()) {
+ mScheduler->onPrimaryDisplayAreaChanged(displayDevice->getWidth() *
+ displayDevice->getHeight());
+ }
+ }
+}
+
+void SurfaceFlinger::processDisplayRemoved(const wp<IBinder>& displayToken) {
+ if (const auto display = getDisplayDeviceLocked(displayToken)) {
+ // Save display ID before disconnecting.
+ const auto displayId = display->getId();
+ display->disconnect();
+
+ if (!display->isVirtual()) {
+ LOG_ALWAYS_FATAL_IF(!displayId);
+ dispatchDisplayHotplugEvent(displayId->value, false);
+ }
+ }
+
+ mDisplays.erase(displayToken);
+}
+
+void SurfaceFlinger::processDisplayChanged(const wp<IBinder>& displayToken,
+ const DisplayDeviceState& currentState,
+ const DisplayDeviceState& drawingState) {
+ const sp<IBinder> currentBinder = IInterface::asBinder(currentState.surface);
+ const sp<IBinder> drawingBinder = IInterface::asBinder(drawingState.surface);
+ if (currentBinder != drawingBinder) {
+ // changing the surface is like destroying and recreating the DisplayDevice
+ if (const auto display = getDisplayDeviceLocked(displayToken)) {
+ display->disconnect();
+ }
+ mDisplays.erase(displayToken);
+ processDisplayAdded(displayToken, currentState);
+ return;
+ }
+
+ if (const auto display = getDisplayDeviceLocked(displayToken)) {
+ if (currentState.layerStack != drawingState.layerStack) {
+ display->setLayerStack(currentState.layerStack);
+ }
+ if ((currentState.orientation != drawingState.orientation) ||
+ (currentState.viewport != drawingState.viewport) ||
+ (currentState.frame != drawingState.frame)) {
+ display->setProjection(currentState.orientation, currentState.viewport,
+ currentState.frame);
+ }
+ if (currentState.width != drawingState.width ||
+ currentState.height != drawingState.height) {
+ display->setDisplaySize(currentState.width, currentState.height);
+ if (display->isPrimary()) {
+ mScheduler->onPrimaryDisplayAreaChanged(currentState.width * currentState.height);
+ }
+ }
+ }
+}
+
void SurfaceFlinger::processDisplayChangesLocked() {
// here we take advantage of Vector's copy-on-write semantics to
// improve performance by skipping the transaction entirely when
@@ -2477,159 +2612,31 @@
const KeyedVector<wp<IBinder>, DisplayDeviceState>& draw(mDrawingState.displays);
if (!curr.isIdenticalTo(draw)) {
mVisibleRegionsDirty = true;
- const size_t cc = curr.size();
- size_t dc = draw.size();
// find the displays that were removed
// (ie: in drawing state but not in current state)
// also handle displays that changed
// (ie: displays that are in both lists)
- for (size_t i = 0; i < dc;) {
- const ssize_t j = curr.indexOfKey(draw.keyAt(i));
+ for (size_t i = 0; i < draw.size(); i++) {
+ const wp<IBinder>& displayToken = draw.keyAt(i);
+ const ssize_t j = curr.indexOfKey(displayToken);
if (j < 0) {
// in drawing state but not in current state
- if (const auto display = getDisplayDeviceLocked(draw.keyAt(i))) {
- // Save display ID before disconnecting.
- const auto displayId = display->getId();
- display->disconnect();
-
- if (!display->isVirtual()) {
- LOG_ALWAYS_FATAL_IF(!displayId);
- dispatchDisplayHotplugEvent(displayId->value, false);
- }
- }
-
- mDisplays.erase(draw.keyAt(i));
+ processDisplayRemoved(displayToken);
} else {
// this display is in both lists. see if something changed.
- const DisplayDeviceState& state(curr[j]);
- const wp<IBinder>& displayToken = curr.keyAt(j);
- const sp<IBinder> state_binder = IInterface::asBinder(state.surface);
- const sp<IBinder> draw_binder = IInterface::asBinder(draw[i].surface);
- if (state_binder != draw_binder) {
- // changing the surface is like destroying and
- // recreating the DisplayDevice, so we just remove it
- // from the drawing state, so that it get re-added
- // below.
- if (const auto display = getDisplayDeviceLocked(displayToken)) {
- display->disconnect();
- }
- mDisplays.erase(displayToken);
- mDrawingState.displays.removeItemsAt(i);
- dc--;
- // at this point we must loop to the next item
- continue;
- }
-
- if (const auto display = getDisplayDeviceLocked(displayToken)) {
- if (state.layerStack != draw[i].layerStack) {
- display->setLayerStack(state.layerStack);
- }
- if ((state.orientation != draw[i].orientation) ||
- (state.viewport != draw[i].viewport) || (state.frame != draw[i].frame)) {
- display->setProjection(state.orientation, state.viewport, state.frame);
- }
- if (state.width != draw[i].width || state.height != draw[i].height) {
- display->setDisplaySize(state.width, state.height);
- if (display->isPrimary()) {
- mScheduler->onPrimaryDisplayAreaChanged(state.width * state.height);
- }
- }
- }
+ const DisplayDeviceState& currentState = curr[j];
+ const DisplayDeviceState& drawingState = draw[i];
+ processDisplayChanged(displayToken, currentState, drawingState);
}
- ++i;
}
// find displays that were added
// (ie: in current state but not in drawing state)
- for (size_t i = 0; i < cc; i++) {
- if (draw.indexOfKey(curr.keyAt(i)) < 0) {
- const DisplayDeviceState& state(curr[i]);
-
- int width = 0;
- int height = 0;
- ui::PixelFormat pixelFormat = static_cast<ui::PixelFormat>(PIXEL_FORMAT_UNKNOWN);
- if (state.physical) {
- const auto& activeConfig =
- getCompositionEngine().getHwComposer().getActiveConfig(
- state.physical->id);
- width = activeConfig->getWidth();
- height = activeConfig->getHeight();
- pixelFormat = static_cast<ui::PixelFormat>(PIXEL_FORMAT_RGBA_8888);
- } else if (state.surface != nullptr) {
- int status = state.surface->query(NATIVE_WINDOW_WIDTH, &width);
- ALOGE_IF(status != NO_ERROR, "Unable to query width (%d)", status);
- status = state.surface->query(NATIVE_WINDOW_HEIGHT, &height);
- ALOGE_IF(status != NO_ERROR, "Unable to query height (%d)", status);
- int intPixelFormat;
- status = state.surface->query(NATIVE_WINDOW_FORMAT, &intPixelFormat);
- ALOGE_IF(status != NO_ERROR, "Unable to query format (%d)", status);
- pixelFormat = static_cast<ui::PixelFormat>(intPixelFormat);
- } else {
- // Virtual displays without a surface are dormant:
- // they have external state (layer stack, projection,
- // etc.) but no internal state (i.e. a DisplayDevice).
- continue;
- }
-
- compositionengine::DisplayCreationArgsBuilder builder;
- if (const auto& physical = state.physical) {
- builder.setPhysical({physical->id, physical->type});
- }
- builder.setPixels(ui::Size(width, height));
- builder.setPixelFormat(pixelFormat);
- builder.setIsSecure(state.isSecure);
- builder.setLayerStackId(state.layerStack);
- builder.setPowerAdvisor(&mPowerAdvisor);
- builder.setUseHwcVirtualDisplays(mUseHwcVirtualDisplays ||
- getHwComposer().isUsingVrComposer());
- builder.setName(state.displayName);
- auto compositionDisplay = getCompositionEngine().createDisplay(builder.build());
-
- sp<compositionengine::DisplaySurface> dispSurface;
- sp<IGraphicBufferProducer> producer;
- sp<IGraphicBufferProducer> bqProducer;
- sp<IGraphicBufferConsumer> bqConsumer;
- getFactory().createBufferQueue(&bqProducer, &bqConsumer, false);
-
- std::optional<DisplayId> displayId = compositionDisplay->getId();
-
- if (state.isVirtual()) {
- sp<VirtualDisplaySurface> vds =
- new VirtualDisplaySurface(getHwComposer(), displayId, state.surface,
- bqProducer, bqConsumer, state.displayName);
-
- dispSurface = vds;
- producer = vds;
- } else {
- ALOGE_IF(state.surface != nullptr,
- "adding a supported display, but rendering "
- "surface is provided (%p), ignoring it",
- state.surface.get());
-
- LOG_ALWAYS_FATAL_IF(!displayId);
- dispSurface = new FramebufferSurface(getHwComposer(), *displayId, bqConsumer,
- maxGraphicsWidth, maxGraphicsHeight);
- producer = bqProducer;
- }
-
- const wp<IBinder>& displayToken = curr.keyAt(i);
- if (dispSurface != nullptr) {
- mDisplays.emplace(displayToken,
- setupNewDisplayDeviceInternal(displayToken,
- compositionDisplay, state,
- dispSurface, producer));
- if (!state.isVirtual()) {
- LOG_ALWAYS_FATAL_IF(!displayId);
- dispatchDisplayHotplugEvent(displayId->value, true);
- }
-
- const auto displayDevice = mDisplays[displayToken];
- if (displayDevice->isPrimary()) {
- mScheduler->onPrimaryDisplayAreaChanged(displayDevice->getWidth() *
- displayDevice->getHeight());
- }
- }
+ for (size_t i = 0; i < curr.size(); i++) {
+ const wp<IBinder>& displayToken = curr.keyAt(i);
+ if (draw.indexOfKey(displayToken) < 0) {
+ processDisplayAdded(displayToken, curr[i]);
}
}
}