Resize boot animation on display changes

Use DisplayEventReceiver to listen for display hotplug
events and resize the boot animation is display size
changes.

Bug: 156448328
Test: manually make sure the boot animation has correct
dimensions in the following cases
     I. With boot animation file
        1. scrcpy
        2. start boot animation with
              adb shell /system/bin/bootanimation
	   when no physical display is connected (= 480p
           fake HWC display). Use the virtual display from
           scrcpy to check the boot animation size.
        3. connect a 1080p display
           (HWC sends hotplug connect to change the display)
        4. disconnect the real display
     II. Same steps without boot animation file
         (android logo should be displayed)

Merged-In: Ib3f0383686399669e8de10456092baaec607fa01
Change-Id: Ib3f0383686399669e8de10456092baaec607fa01

1 files changed, 12 insertions, 0 deletions

diff --git a/cmds/bootanimation/BootAnimation.h b/cmds/bootanimation/BootAnimation.h
index 574d65e425cf..36cd91bdee0d 100644
--- a/cmds/bootanimation/BootAnimation.h
+++ b/cmds/bootanimation/BootAnimation.h
@@ -18,11 +18,14 @@
 #define ANDROID_BOOTANIMATION_H
 
 #include <vector>
+#include <queue>
 
 #include <stdint.h>
 #include <sys/types.h>
 
 #include <androidfw/AssetManager.h>
+#include <gui/DisplayEventReceiver.h>
+#include <utils/Looper.h>
 #include <utils/Thread.h>
 #include <binder/IBinder.h>
 
@@ -145,6 +148,11 @@ private:
         BootAnimation* mBootAnimation;
     };
 
+    // Display event handling
+    class DisplayEventCallback;
+    int displayEventCallback(int fd, int events, void* data);
+    void processDisplayEvents();
+
     status_t initTexture(Texture* texture, AssetManager& asset, const char* name);
     status_t initTexture(FileMap* map, int* width, int* height);
     status_t initFont(Font* font, const char* fallback);
@@ -161,6 +169,8 @@ private:
     void findBootAnimationFile();
     bool findBootAnimationFileInternal(const std::vector<std::string>& files);
     bool preloadAnimation();
+    EGLConfig getEglConfig(const EGLDisplay&);
+    void resizeSurface(int newWidth, int newHeight);
 
     void checkExit();
 
@@ -189,6 +199,8 @@ private:
     sp<TimeCheckThread> mTimeCheckThread = nullptr;
     sp<Callbacks> mCallbacks;
     Animation* mAnimation = nullptr;
+    std::unique_ptr<DisplayEventReceiver> mDisplayEventReceiver;
+    sp<Looper> mLooper;
 };
 
 // ---------------------------------------------------------------------------