From eafcb9978615149b116ce695374d849cff011c1e Mon Sep 17 00:00:00 2001
From: Yegor Malyshev <emalyshev@google.com>
Date: Thu, 10 Sep 2020 16:42:20 +0200
Subject: Support animation parts fading out

This support helps with several things:
- simpler animation structure (size, number of items)
- more room for designers avoiding thinking about exit part
- time saving as complete parts now can be safely used as fading parts

Bug: 167352662
Test: Manual testing of major/edge cases
  - backward compatibility => "f 0" is mapped to "p", "p" still works
  - only trimmed areas are faded out
  - clock is not faded out (wear case)
  - adb shell su root bootanimation
  - [c, (exit) f 120, c] => "f 120" fades out and "c" completes
  - [c, (exit) f 120, f 320] => "f 120" fades out and "f 320" skipped
  - [c, f 16, (exit) f 120] => "f 16" played, "f 120" fades out
  - [c, (exit) f 0, f 120] => "f 0" skipped, "f 120" fades out

Change-Id: I9b200ee7107ef9b3dc8d711658ed1042b83739c2
Merged-In: I9b200ee7107ef9b3dc8d711658ed1042b83739c2
---
 cmds/bootanimation/BootAnimation.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'cmds/bootanimation/BootAnimation.h')

diff --git a/cmds/bootanimation/BootAnimation.h b/cmds/bootanimation/BootAnimation.h
index 6ba7fd450fbb..aee385387f57 100644
--- a/cmds/bootanimation/BootAnimation.h
+++ b/cmds/bootanimation/BootAnimation.h
@@ -19,6 +19,7 @@
 
 #include <vector>
 #include <queue>
+#include <climits>
 
 #include <stdint.h>
 #include <sys/types.h>
@@ -45,6 +46,8 @@ class SurfaceControl;
 class BootAnimation : public Thread, public IBinder::DeathRecipient
 {
 public:
+    static constexpr int MAX_FADED_FRAMES_COUNT = std::numeric_limits<int>::max();
+
     struct Texture {
         GLint   w;
         GLint   h;
@@ -84,10 +87,15 @@ public:
             String8 trimData;
             SortedVector<Frame> frames;
             bool playUntilComplete;
+            int framesToFadeCount;
             float backgroundColor[3];
             uint8_t* audioData;
             int audioLength;
             Animation* animation;
+
+            bool hasFadingPhase() const {
+                return !playUntilComplete && framesToFadeCount > 0;
+            }
         };
         int fps;
         int width;
@@ -160,6 +168,8 @@ private:
     bool movie();
     void drawText(const char* str, const Font& font, bool bold, int* x, int* y);
     void drawClock(const Font& font, const int xPos, const int yPos);
+    void fadeFrame(int frameLeft, int frameBottom, int frameWidth, int frameHeight,
+                   const Animation::Part& part, int fadedFramesCount);
     bool validClock(const Animation::Part& part);
     Animation* loadAnimation(const String8&);
     bool playAnimation(const Animation&);
@@ -172,7 +182,9 @@ private:
     EGLConfig getEglConfig(const EGLDisplay&);
     ui::Size limitSurfaceSize(int width, int height) const;
     void resizeSurface(int newWidth, int newHeight);
+    void projectSceneToWindow();
 
+    bool shouldStopPlayingPart(const Animation::Part& part, int fadedFramesCount);
     void checkExit();
 
     void handleViewport(nsecs_t timestep);
-- 
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