说明
本文所述解决方案具有 特殊性, 针对性, 需结合系统当前实现的屏幕方向设置方案.
仅供参考 请勿生搬硬套
*本文无动画流程解读说明, 请移步
*本文无固定屏幕方向方案解读说明, 请移步
平台
RK3288 + Android 7.1
概述
固定了屏幕方向后, 默认不旋转时, 所有的显示都正常, 但是, 在旋转后, 开机动画显示的方向要么不准确, 要么会跳变.
前提
屏幕旋转方向有四个值, 分别为
Surface.ROTATION_0 (默认)
Surface.ROTATION_90
Surface.ROTATION_180
Surface.ROTATION_270
分析
|-- frameworks/base/cmds/bootanimation/BootAnimation.cpp
BootAnimation::BootAnimation(bool shutdown) : Thread(false), mClockEnabled(true), mTimeIsAccurate(false),
mTimeFormat12Hour(false), mTimeCheckThread(NULL) {
mSession = new SurfaceComposerClient();
// If the system has already booted, the animation is not being used for a boot.
mSystemBoot = !property_get_bool(BOOT_COMPLETED_PROP_NAME, 0);
mShutdown = shutdown;
mReverseAxis = false;
mVideoFile = NULL;
mVideoAnimation = false;
if(mShutdown){
sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(
ISurfaceComposer::eDisplayIdMain)); // primary_display_token
DisplayInfo dinfo;
status_t status = SurfaceComposerClient::getDisplayInfo(dtoken, &dinfo);
if (status == OK) {
ALOGD("DISPLAY,W-H: %d-%d, ori: %d", dinfo.w, dinfo.h, dinfo.orientation);
if(dinfo.orientation==1 || dinfo.orientation==3 )
mReverseAxis=true;
else
mReverseAxis=false;
}
}
}
初步怀疑是屏幕旋转导致了问题存在, 于是, 从上面的代码中, 抽取了读取屏幕信息的方法, 并打印出信息.
代码到动画绘制的循环中
bool BootAnimation::android()
{
//...
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
//加入打印显示信息代码
sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(
ISurfaceComposer::eDisplayIdMain)); // primary_display_token
DisplayInfo dinfo;
const nsecs_t startTime = systemTime();
do {
//加入打印显示信息代码.
status_t status = SurfaceComposerClient::getDisplayInfo(dtoken, &dinfo);
if (status == OK) {
ALOGD("DISPLAY,W-H: %d-%d, ori: %d", dinfo.w, dinfo.h, dinfo.orientation);
}
//...
checkExit();
} while (!exitPending());
}
LOG内容如下:
01-03 01:17:31.965 327-376/? D/BootAnimation: DISPLAY,W-H: 1920-1080, ori: 0
手上的设备是 1920x1080 15.6寸屏, 默认为横屏
当固定屏幕方向旋转90度(竖屏)时, 输出的LOG为:
2019-09-09 09:31:39.731 ? D/BootAnimation: DISPLAY,W-H: 1920-1080, ori: 0
//还有很多
2019-09-09 09:31:47.471 ? D/BootAnimation: DISPLAY,W-H: 1920-1080, ori: 1
//还有很多
通过观察, 旋转问题出现时确实是在屏幕方向变化时, 另外, 还有一个问题, 第一个动画的界面, 方向依然是默认的0度横屏方向.
总结下问题有两个:
- 动画启动界面方向为默认零度, 不随系统设置变化.
- 动画启动过程中, 会出来旋转并导致显示内容不完整, 如图:
解决动画启动界面方向:
|-- frameworks/base/cmds/bootanimation/BootAnimation.cpp
BootAnimation::BootAnimation(bool shutdown) : Thread(false), mClockEnabled(true), mTimeIsAccurate(false),
mTimeFormat12Hour(false), mTimeCheckThread(NULL) {
mSession = new SurfaceComposerClient();
// If the system has already booted, the animation is not being used for a boot.
mSystemBoot = !property_get_bool(BOOT_COMPLETED_PROP_NAME, 0);
mShutdown = shutdown;
mReverseAxis = false;
mVideoFile = NULL;
mVideoAnimation = false;
//注释mShotdown判断, 启动时, 方向有可能设置为0以外的数值
//if(mShutdown){
sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(
ISurfaceComposer::eDisplayIdMain)); // primary_display_token
DisplayInfo dinfo;
status_t status = SurfaceComposerClient::getDisplayInfo(dtoken, &dinfo);
if (status == OK) {
ALOGD("DISPLAY,W-H: %d-%d, ori: %d", dinfo.w, dinfo.h, dinfo.orientation);
//解决启动时方向错误, 其中, 变量 rot根据需要的方向设置[0, 3];
int rot = 1;//90度
if (rot >= 0) {
int w = dinfo.w;
int h = dinfo.h;
if(rot == 1 || rot == 3){
//竖屏时, xy轴需要对调
mReverseAxis=true;
h = dinfo.w;
w = dinfo.h;
}else{
mReverseAxis=false;
}
Rect layerStackRect(w, h);
Rect displayRect(0, 0, w, h);
SurfaceComposerClient::setDisplayProjection(dtoken, rot, layerStackRect, displayRect);
}
}
//}
}
status_t BootAnimation::readyToRun() {
mAssets.addDefaultAssets();
sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(
ISurfaceComposer::eDisplayIdMain));
DisplayInfo dinfo;
status_t status = SurfaceComposerClient::getDisplayInfo(dtoken, &dinfo);
if (status)
return -1;
// create the native surface
int curWidth = dinfo.w;
int curHeight = dinfo.h;
//注释 mShutdown, 屏幕旋转不只发生在关机动画时.
if(/*mShutdown && */mReverseAxis){
curWidth = dinfo.h;
curHeight = dinfo.w;
}
//...省略代码
}
解决动画绘制过程中方向跳变.
动画中打印的LOG如下:
//启动正常
2019-09-09 10:41:20.662 ? D/BootAnimation: DISPLAY,W-H: 1920-1080, ori: 0
2019-09-09 10:41:20.818 ? D/BootAnimation: DISPLAY,W-H: 1920-1080, ori: 1
//省略
//到这时转回默认方向,
2019-09-09 10:41:25.101 ? D/BootAnimation: DISPLAY,W-H: 1920-1080, ori: 0
//省略
//最后转回正常方向
2019-09-09 10:41:29.438 ? D/BootAnimation: DISPLAY,W-H: 1920-1080, ori: 1
|–frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.java
private WindowManagerService(Context context, InputManagerService inputManager,
boolean haveInputMethods, boolean showBootMsgs, boolean onlyCore) {
//... 省略代码
// Add ourself to the Watchdog monitors.
Watchdog.getInstance().addMonitor(this);
//设置默认旋转方向, 与动画的默认方向保持一致
mRotation = Surface.ROTATION_90;
SurfaceControl.openTransaction();
try {
createWatermarkInTransaction();
} finally {
SurfaceControl.closeTransaction();
}
showEmulatorDisplayOverlayIfNeeded();
}
/**
* Updates the current rotation.
*
* Returns true if the rotation has been changed. In this case YOU
* MUST CALL sendNewConfiguration() TO UNFREEZE THE SCREEN.
*/
public boolean updateRotationUncheckedLocked(boolean inTransaction) {
//省略大量代码
if (DEBUG_ORIENTATION) {
Slog.v(TAG_WM, "Selected orientation "
+ mLastOrientation + ", got rotation " + rotation
+ " which has " + (altOrientation ? "incompatible" : "compatible")
+ " metrics");
}
//保持默认方向
/*if (mRotateOnBoot) {
mRotation = Surface.ROTATION_0;
rotation = Surface.ROTATION_90;
}*/
if (mRotation == rotation && mAltOrientation == altOrientation) {
// No change.
return false;
}
//省略大量代码
}
转屏相关代码记录:
以下流程存在多次调用, 分析时需仔细
com.android.server.wm.WindowManagerService.displayReady(WindowManagerService.java:8781)
com.android.server.am.ActivityManagerService.updateConfiguration(ActivityManagerService.java:19241)
com.android.server.am.ActivityManagerService.updateConfigurationLocked(ActivityManagerService.java:19255)
com.android.server.am.ActivityManagerService.updateConfigurationLocked(ActivityManagerService.java:19261)
com.android.server.am.ActivityManagerService.updateConfigurationLocked(ActivityManagerService.java:19393)
com.android.server.wm.WindowManagerService.setNewConfiguration(WindowManagerService.java:4413)
com.android.server.wm.WindowManagerService.onConfigurationChanged(WindowManagerService.java:4448)
com.android.server.wm.WindowManagerService.reconfigureDisplayLocked(WindowManagerService.java:9952)
com.android.server.wm.WindowManagerService.sendNewConfiguration(WindowManagerService.java:8035)
com.android.server.am.ActivityManagerService.updateConfiguration(ActivityManagerService.java:19241)
com.android.server.am.ActivityManagerService.updateConfigurationLocked(ActivityManagerService.java:19255)
com.android.server.am.ActivityManagerService.updateConfigurationLocked(ActivityManagerService.java:19261)
com.android.server.am.ActivityManagerService.updateConfigurationLocked(ActivityManagerService.java:19424)
com.android.server.wm.WindowManagerService.continueSurfaceLayout(WindowManagerService.java:5957)
com.android.server.wm.WindowSurfacePlacer.continueLayout(WindowSurfacePlacer.java:173)
com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:184)
com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:235)
com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementInner(WindowSurfacePlacer.java:320)
com.android.server.wm.WindowSurfacePlacer.applySurfaceChangesTransaction(WindowSurfacePlacer.java:884)
com.android.server.display.DisplayManagerService$LocalService.performTraversalInTransactionFromWindowManager(DisplayManagerService.java:1671)
com.android.server.display.DisplayManagerService.performTraversalInTransactionFromWindowManagerInternal(DisplayManagerService.java:338)
com.android.server.display.DisplayManagerService.performTraversalInTransactionLocked(DisplayManagerService.java:892)
com.android.server.display.DisplayManagerService.configureDisplayInTransactionLocked(DisplayManagerService.java:983)
com.android.server.display.LogicalDisplay.configureDisplayInTransactionLocked(LogicalDisplay.java:426)
com.android.server.display.DisplayDevice.setProjectionInTransactionLocked(DisplayDevice.java:194)
com.android.server.display.DisplayDevice.setDisplayProjection()
最终更新屏幕显示:
frameworks/base/services/core/java/com/android/server/display/DisplayDevice.java
/**
* Sets the display projection while in a transaction.
*
* @param orientation defines the display's orientation
* @param layerStackRect defines which area of the window manager coordinate
* space will be used
* @param displayRect defines where on the display will layerStackRect be
* mapped to. displayRect is specified post-orientation, that is
* it uses the orientation seen by the end-user
*/
public final void setProjectionInTransactionLocked(int orientation,
Rect layerStackRect, Rect displayRect) {
if (mCurrentOrientation != orientation
|| mCurrentLayerStackRect == null
|| !mCurrentLayerStackRect.equals(layerStackRect)
|| mCurrentDisplayRect == null
|| !mCurrentDisplayRect.equals(displayRect)) {
mCurrentOrientation = orientation;
if (mCurrentLayerStackRect == null) {
mCurrentLayerStackRect = new Rect();
}
mCurrentLayerStackRect.set(layerStackRect);
if (mCurrentDisplayRect == null) {
mCurrentDisplayRect = new Rect();
}
mCurrentDisplayRect.set(displayRect);
//与Bootanimation中的函数类似
SurfaceControl.setDisplayProjection(mDisplayToken,
orientation, layerStackRect, displayRect);
}
}