private DisplayInfo getDisplayInfoInternal(int displayId, int callingUid) {
synchronized (mSyncRoot) {
LogicalDisplay display = mLogicalDisplays.get(displayId);
if (display != null) {
DisplayInfo info = display.getDisplayInfoLocked();
if (info.hasAccess(callingUid)) {
return info;
}
}
return null;
}
}
/**
* Overrides the display information of a particular logical display. This is used by the window
* manager to control the size and characteristics of the default display. It is expected to apply
* the requested change to the display information synchronously so that applications will
* immediately observe the new state.
*
* @param displayId The logical display id.
* @param info The new data to be stored.
*/
public void setDisplayInfoOverrideFromWindowManager(int displayId, DisplayInfo info) {
synchronized (mSyncRoot) {
LogicalDisplay display = mLogicalDisplays.get(displayId);
if (display != null) {
mTempDisplayInfo.copyFrom(display.getDisplayInfoLocked());
display.setDisplayInfoOverrideFromWindowManagerLocked(info);
if (!mTempDisplayInfo.equals(display.getDisplayInfoLocked())) {
sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
scheduleTraversalLocked(false);
}
}
}
}
/**
* Gets the size of the display as a rectangle, in pixels.
*
* @param outSize A {@link Rect} object to receive the size information.
* @see #getSize(Point)
*/
public void getRectSize(Rect outSize) {
synchronized (this) {
updateDisplayInfoLocked();
mDisplayInfo.getAppMetrics(mTempMetrics, mDisplayAdjustments);
outSize.set(0, 0, mTempMetrics.widthPixels, mTempMetrics.heightPixels);
}
}
/**
* Gets a full copy of the display information.
*
* @param outDisplayInfo The object to receive the copy of the display information.
* @return True if the display is still valid.
* @hide
*/
public boolean getDisplayInfo(DisplayInfo outDisplayInfo) {
synchronized (this) {
updateDisplayInfoLocked();
outDisplayInfo.copyFrom(mDisplayInfo);
return mIsValid;
}
}
/**
* Gets the size of the display, in pixels.
*
* <p>Note that this value should <em>not</em> be used for computing layouts, since a device will
* typically have screen decoration (such as a status bar) along the edges of the display that
* reduce the amount of application space available from the size returned here. Layouts should
* instead use the window size.
*
* <p>The size is adjusted based on the current rotation of the display.
*
* <p>The size returned by this method does not necessarily represent the actual raw size (native
* resolution) of the display. The returned size may be adjusted to exclude certain system
* decoration elements that are always visible. It may also be scaled to provide compatibility
* with older applications that were originally designed for smaller displays.
*
* @param outSize A {@link Point} object to receive the size information.
*/
public void getSize(Point outSize) {
synchronized (this) {
updateDisplayInfoLocked();
mDisplayInfo.getAppMetrics(mTempMetrics, mDisplayAdjustments);
outSize.x = mTempMetrics.widthPixels;
outSize.y = mTempMetrics.heightPixels;
}
}
/**
* Gets display metrics based on the real size of this display.
*
* <p>The size is adjusted based on the current rotation of the display.
*
* <p>The real size may be smaller than the physical size of the screen when the window manager is
* emulating a smaller display (using adb shell am display-size).
*
* @param outMetrics A {@link DisplayMetrics} object to receive the metrics.
*/
public void getRealMetrics(DisplayMetrics outMetrics) {
synchronized (this) {
updateDisplayInfoLocked();
mDisplayInfo.getLogicalMetrics(
outMetrics,
CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO,
mDisplayAdjustments.getActivityToken());
}
}
private int[] getDisplayIdsInternal(int callingUid) {
synchronized (mSyncRoot) {
final int count = mLogicalDisplays.size();
int[] displayIds = new int[count];
int n = 0;
for (int i = 0; i < count; i++) {
LogicalDisplay display = mLogicalDisplays.valueAt(i);
DisplayInfo info = display.getDisplayInfoLocked();
if (info.hasAccess(callingUid)) {
displayIds[n++] = mLogicalDisplays.keyAt(i);
}
}
if (n != count) {
displayIds = Arrays.copyOfRange(displayIds, 0, n);
}
return displayIds;
}
}
private void updateCachedAppSizeIfNeededLocked() {
long now = SystemClock.uptimeMillis();
if (now > mLastCachedAppSizeUpdate + CACHED_APP_SIZE_DURATION_MILLIS) {
updateDisplayInfoLocked();
mDisplayInfo.getAppMetrics(mTempMetrics, mDisplayAdjustments);
mCachedAppWidthCompat = mTempMetrics.widthPixels;
mCachedAppHeightCompat = mTempMetrics.heightPixels;
mLastCachedAppSizeUpdate = now;
}
}
/**
* Warms up the electron beam in preparation for turning on or off. This method prepares a GL
* context, and captures a screen shot.
*
* @param mode The desired mode for the upcoming animation.
* @return True if the electron beam is ready, false if it is uncontrollable.
*/
public boolean prepare(int mode) {
if (DEBUG) {
Slog.d(TAG, "prepare: mode=" + mode);
}
mMode = mode;
// Get the display size and layer stack.
// This is not expected to change while the electron beam surface is showing.
DisplayInfo displayInfo = mDisplayManager.getDisplayInfo(Display.DEFAULT_DISPLAY);
mDisplayLayerStack = displayInfo.layerStack;
if (mSwapNeeded) {
mDisplayWidth = displayInfo.getNaturalHeight();
mDisplayHeight = displayInfo.getNaturalWidth();
} else {
mDisplayWidth = displayInfo.getNaturalWidth();
mDisplayHeight = displayInfo.getNaturalHeight();
}
// Prepare the surface for drawing.
if (!tryPrepare()) {
dismiss();
return false;
}
// Done.
mPrepared = true;
// Dejanking optimization.
// Some GL drivers can introduce a lot of lag in the first few frames as they
// initialize their state and allocate graphics buffers for rendering.
// Work around this problem by rendering the first frame of the animation a few
// times. The rest of the animation should run smoothly thereafter.
// The frames we draw here aren't visible because we are essentially just
// painting the screenshot as-is.
if (mode == MODE_COOL_DOWN) {
for (int i = 0; i < DEJANK_FRAMES; i++) {
draw(1.0f);
}
}
return true;
}
// Updates all existing logical displays given the current set of display devices.
// Removes invalid logical displays.
// Sends notifications if needed.
private boolean updateLogicalDisplaysLocked() {
boolean changed = false;
for (int i = mLogicalDisplays.size(); i-- > 0; ) {
final int displayId = mLogicalDisplays.keyAt(i);
LogicalDisplay display = mLogicalDisplays.valueAt(i);
mTempDisplayInfo.copyFrom(display.getDisplayInfoLocked());
display.updateLocked(mDisplayDevices);
if (!display.isValidLocked()) {
mLogicalDisplays.removeAt(i);
sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_REMOVED);
changed = true;
} else if (!mTempDisplayInfo.equals(display.getDisplayInfoLocked())) {
sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
changed = true;
}
}
return changed;
}
// For debugging purposes
@Override
public String toString() {
synchronized (this) {
updateDisplayInfoLocked();
mDisplayInfo.getAppMetrics(mTempMetrics, mDisplayAdjustments);
return "Display id "
+ mDisplayId
+ ": "
+ mDisplayInfo
+ ", "
+ mTempMetrics
+ ", isValid="
+ mIsValid;
}
}
/**
* Gets display metrics that describe the size and density of this display.
*
* <p>The size is adjusted based on the current rotation of the display.
*
* <p>The size returned by this method does not necessarily represent the actual raw size (native
* resolution) of the display. The returned size may be adjusted to exclude certain system decor
* elements that are always visible. It may also be scaled to provide compatibility with older
* applications that were originally designed for smaller displays.
*
* @param outMetrics A {@link DisplayMetrics} object to receive the metrics.
*/
public void getMetrics(DisplayMetrics outMetrics) {
synchronized (this) {
updateDisplayInfoLocked();
mDisplayInfo.getAppMetrics(outMetrics, mDisplayAdjustments);
}
}