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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.view;
import dalvik.system.CloseGuard;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.graphics.Region;
import android.os.IBinder;
import android.util.Log;
import android.view.Surface.OutOfResourcesException;
/**
* SurfaceControl
* @hide
*/
public class SurfaceControl {
private static final String TAG = "SurfaceControl";
private static native long nativeCreate(SurfaceSession session, String name,
int w, int h, int format, int flags)
throws OutOfResourcesException;
private static native void nativeRelease(long nativeObject);
private static native void nativeDestroy(long nativeObject);
private static native Bitmap nativeScreenshot(IBinder displayToken,
Rect sourceCrop, int width, int height, int minLayer, int maxLayer,
boolean allLayers, boolean useIdentityTransform, int rotation);
private static native void nativeScreenshot(IBinder displayToken, Surface consumer,
Rect sourceCrop, int width, int height, int minLayer, int maxLayer,
boolean allLayers, boolean useIdentityTransform);
private static native void nativeOpenTransaction();
private static native void nativeCloseTransaction();
private static native void nativeSetAnimationTransaction();
private static native void nativeSetLayer(long nativeObject, int zorder);
private static native void nativeSetPosition(long nativeObject, float x, float y);
private static native void nativeSetSize(long nativeObject, int w, int h);
private static native void nativeSetTransparentRegionHint(long nativeObject, Region region);
private static native void nativeSetAlpha(long nativeObject, float alpha);
private static native void nativeSetMatrix(long nativeObject, float dsdx, float dtdx, float dsdy, float dtdy);
private static native void nativeSetFlags(long nativeObject, int flags, int mask);
private static native void nativeSetWindowCrop(long nativeObject, int l, int t, int r, int b);
private static native void nativeSetLayerStack(long nativeObject, int layerStack);
private static native boolean nativeClearContentFrameStats(long nativeObject);
private static native boolean nativeGetContentFrameStats(long nativeObject, WindowContentFrameStats outStats);
private static native boolean nativeClearAnimationFrameStats();
private static native boolean nativeGetAnimationFrameStats(WindowAnimationFrameStats outStats);
private static native IBinder nativeGetBuiltInDisplay(int physicalDisplayId);
private static native IBinder nativeCreateDisplay(String name, boolean secure);
private static native void nativeDestroyDisplay(IBinder displayToken);
private static native void nativeSetDisplaySurface(
IBinder displayToken, long nativeSurfaceObject);
private static native void nativeSetDisplayLayerStack(
IBinder displayToken, int layerStack);
private static native void nativeSetDisplayProjection(
IBinder displayToken, int orientation,
int l, int t, int r, int b,
int L, int T, int R, int B);
private static native void nativeSetDisplaySize(IBinder displayToken, int width, int height);
private static native SurfaceControl.PhysicalDisplayInfo[] nativeGetDisplayConfigs(
IBinder displayToken);
private static native int nativeGetActiveConfig(IBinder displayToken);
private static native boolean nativeSetActiveConfig(IBinder displayToken, int id);
private static native void nativeSetDisplayPowerMode(
IBinder displayToken, int mode);
private final CloseGuard mCloseGuard = CloseGuard.get();
private final String mName;
long mNativeObject; // package visibility only for Surface.java access
/* flags used in constructor (keep in sync with ISurfaceComposerClient.h) */
/**
* Surface creation flag: Surface is created hidden
*/
public static final int HIDDEN = 0x00000004;
/**
* Surface creation flag: The surface contains secure content, special
* measures will be taken to disallow the surface's content to be copied
* from another process. In particular, screenshots and VNC servers will
* be disabled, but other measures can take place, for instance the
* surface might not be hardware accelerated.
*
*/
public static final int SECURE = 0x00000080;
/**
* Surface creation flag: Creates a surface where color components are interpreted
* as "non pre-multiplied" by their alpha channel. Of course this flag is
* meaningless for surfaces without an alpha channel. By default
* surfaces are pre-multiplied, which means that each color component is
* already multiplied by its alpha value. In this case the blending
* equation used is:
*
* DEST = SRC + DEST * (1-SRC_ALPHA)
*
* By contrast, non pre-multiplied surfaces use the following equation:
*
* DEST = SRC * SRC_ALPHA * DEST * (1-SRC_ALPHA)
*
* pre-multiplied surfaces must always be used if transparent pixels are
* composited on top of each-other into the surface. A pre-multiplied
* surface can never lower the value of the alpha component of a given
* pixel.
*
* In some rare situations, a non pre-multiplied surface is preferable.
*
*/
public static final int NON_PREMULTIPLIED = 0x00000100;
/**
* Surface creation flag: Indicates that the surface must be considered opaque,
* even if its pixel format is set to translucent. This can be useful if an
* application needs full RGBA 8888 support for instance but will
* still draw every pixel opaque.
*
* This flag is ignored if setAlpha() is used to make the surface non-opaque.
* Combined effects are (assuming a buffer format with an alpha channel):
*
* - OPAQUE + alpha(1.0) == opaque composition
*
- OPAQUE + alpha(0.x) == blended composition
*
- !OPAQUE + alpha(1.0) == blended composition
*
- !OPAQUE + alpha(0.x) == blended composition
*
* If the underlying buffer lacks an alpha channel, the OPAQUE flag is effectively
* set automatically.
*/
public static final int OPAQUE = 0x00000400;
/**
* Surface creation flag: Application requires a hardware-protected path to an
* external display sink. If a hardware-protected path is not available,
* then this surface will not be displayed on the external sink.
*
*/
public static final int PROTECTED_APP = 0x00000800;
// 0x1000 is reserved for an independent DRM protected flag in framework
/**
* Surface creation flag: Window represents a cursor glyph.
*/
public static final int CURSOR_WINDOW = 0x00002000;
/**
* Surface creation flag: Creates a normal surface.
* This is the default.
*
*/
public static final int FX_SURFACE_NORMAL = 0x00000000;
/**
* Surface creation flag: Creates a Dim surface.
* Everything behind this surface is dimmed by the amount specified
* in {@link #setAlpha}. It is an error to lock a Dim surface, since it
* doesn't have a backing store.
*
*/
public static final int FX_SURFACE_DIM = 0x00020000;
/**
* Mask used for FX values above.
*
*/
public static final int FX_SURFACE_MASK = 0x000F0000;
/* flags used with setFlags() (keep in sync with ISurfaceComposer.h) */
/**
* Surface flag: Hide the surface.
* Equivalent to calling hide().
* Updates the value set during Surface creation (see {@link #HIDDEN}).
*/
private static final int SURFACE_HIDDEN = 0x01;
/**
* Surface flag: composite without blending when possible.
* Updates the value set during Surface creation (see {@link #OPAQUE}).
*/
private static final int SURFACE_OPAQUE = 0x02;
/* built-in physical display ids (keep in sync with ISurfaceComposer.h)
* these are different from the logical display ids used elsewhere in the framework */
/**
* Built-in physical display id: Main display.
* Use only with {@link SurfaceControl#getBuiltInDisplay(int)}.
*/
public static final int BUILT_IN_DISPLAY_ID_MAIN = 0;
/**
* Built-in physical display id: Attached HDMI display.
* Use only with {@link SurfaceControl#getBuiltInDisplay(int)}.
*/
public static final int BUILT_IN_DISPLAY_ID_HDMI = 1;
/* Display power modes * /
/**
* Display power mode off: used while blanking the screen.
* Use only with {@link SurfaceControl#setDisplayPowerMode}.
*/
public static final int POWER_MODE_OFF = 0;
/**
* Display power mode doze: used while putting the screen into low power mode.
* Use only with {@link SurfaceControl#setDisplayPowerMode}.
*/
public static final int POWER_MODE_DOZE = 1;
/**
* Display power mode normal: used while unblanking the screen.
* Use only with {@link SurfaceControl#setDisplayPowerMode}.
*/
public static final int POWER_MODE_NORMAL = 2;
/**
* Display power mode doze: used while putting the screen into a suspended
* low power mode. Use only with {@link SurfaceControl#setDisplayPowerMode}.
*/
public static final int POWER_MODE_DOZE_SUSPEND = 3;
/**
* Create a surface with a name.
*
* The surface creation flags specify what kind of surface to create and
* certain options such as whether the surface can be assumed to be opaque
* and whether it should be initially hidden. Surfaces should always be
* created with the {@link #HIDDEN} flag set to ensure that they are not
* made visible prematurely before all of the surface's properties have been
* configured.
*
* Good practice is to first create the surface with the {@link #HIDDEN} flag
* specified, open a transaction, set the surface layer, layer stack, alpha,
* and position, call {@link #show} if appropriate, and close the transaction.
*
* @param session The surface session, must not be null.
* @param name The surface name, must not be null.
* @param w The surface initial width.
* @param h The surface initial height.
* @param flags The surface creation flags. Should always include {@link #HIDDEN}
* in the creation flags.
*
* @throws throws OutOfResourcesException If the SurfaceControl cannot be created.
*/
public SurfaceControl(SurfaceSession session,
String name, int w, int h, int format, int flags)
throws OutOfResourcesException {
if (session == null) {
throw new IllegalArgumentException("session must not be null");
}
if (name == null) {
throw new IllegalArgumentException("name must not be null");
}
if ((flags & SurfaceControl.HIDDEN) == 0) {
Log.w(TAG, "Surfaces should always be created with the HIDDEN flag set "
+ "to ensure that they are not made visible prematurely before "
+ "all of the surface's properties have been configured. "
+ "Set the other properties and make the surface visible within "
+ "a transaction. New surface name: " + name,
new Throwable());
}
mName = name;
mNativeObject = nativeCreate(session, name, w, h, format, flags);
if (mNativeObject == 0) {
throw new OutOfResourcesException(
"Couldn't allocate SurfaceControl native object");
}
mCloseGuard.open("release");
}
@Override
protected void finalize() throws Throwable {
try {
if (mCloseGuard != null) {
mCloseGuard.warnIfOpen();
}
if (mNativeObject != 0) {
nativeRelease(mNativeObject);
}
} finally {
super.finalize();
}
}
@Override
public String toString() {
return "Surface(name=" + mName + ")";
}
/**
* Release the local reference to the server-side surface.
* Always call release() when you're done with a Surface.
* This will make the surface invalid.
*/
public void release() {
if (mNativeObject != 0) {
nativeRelease(mNativeObject);
mNativeObject = 0;
}
mCloseGuard.close();
}
/**
* Free all server-side state associated with this surface and
* release this object's reference. This method can only be
* called from the process that created the service.
*/
public void destroy() {
if (mNativeObject != 0) {
nativeDestroy(mNativeObject);
mNativeObject = 0;
}
mCloseGuard.close();
}
private void checkNotReleased() {
if (mNativeObject == 0) throw new NullPointerException(
"mNativeObject is null. Have you called release() already?");
}
/*
* set surface parameters.
* needs to be inside open/closeTransaction block
*/
/** start a transaction */
public static void openTransaction() {
nativeOpenTransaction();
}
/** end a transaction */
public static void closeTransaction() {
nativeCloseTransaction();
}
/** flag the transaction as an animation */
public static void setAnimationTransaction() {
nativeSetAnimationTransaction();
}
public void setLayer(int zorder) {
checkNotReleased();
nativeSetLayer(mNativeObject, zorder);
}
public void setPosition(float x, float y) {
checkNotReleased();
nativeSetPosition(mNativeObject, x, y);
}
public void setSize(int w, int h) {
checkNotReleased();
nativeSetSize(mNativeObject, w, h);
}
public void hide() {
checkNotReleased();
nativeSetFlags(mNativeObject, SURFACE_HIDDEN, SURFACE_HIDDEN);
}
public void show() {
checkNotReleased();
nativeSetFlags(mNativeObject, 0, SURFACE_HIDDEN);
}
public void setTransparentRegionHint(Region region) {
checkNotReleased();
nativeSetTransparentRegionHint(mNativeObject, region);
}
public boolean clearContentFrameStats() {
checkNotReleased();
return nativeClearContentFrameStats(mNativeObject);
}
public boolean getContentFrameStats(WindowContentFrameStats outStats) {
checkNotReleased();
return nativeGetContentFrameStats(mNativeObject, outStats);
}
public static boolean clearAnimationFrameStats() {
return nativeClearAnimationFrameStats();
}
public static boolean getAnimationFrameStats(WindowAnimationFrameStats outStats) {
return nativeGetAnimationFrameStats(outStats);
}
/**
* Sets an alpha value for the entire Surface. This value is combined with the
* per-pixel alpha. It may be used with opaque Surfaces.
*/
public void setAlpha(float alpha) {
checkNotReleased();
nativeSetAlpha(mNativeObject, alpha);
}
public void setMatrix(float dsdx, float dtdx, float dsdy, float dtdy) {
checkNotReleased();
nativeSetMatrix(mNativeObject, dsdx, dtdx, dsdy, dtdy);
}
public void setWindowCrop(Rect crop) {
checkNotReleased();
if (crop != null) {
nativeSetWindowCrop(mNativeObject,
crop.left, crop.top, crop.right, crop.bottom);
} else {
nativeSetWindowCrop(mNativeObject, 0, 0, 0, 0);
}
}
public void setLayerStack(int layerStack) {
checkNotReleased();
nativeSetLayerStack(mNativeObject, layerStack);
}
/**
* Sets the opacity of the surface. Setting the flag is equivalent to creating the
* Surface with the {@link #OPAQUE} flag.
*/
public void setOpaque(boolean isOpaque) {
checkNotReleased();
if (isOpaque) {
nativeSetFlags(mNativeObject, SURFACE_OPAQUE, SURFACE_OPAQUE);
} else {
nativeSetFlags(mNativeObject, 0, SURFACE_OPAQUE);
}
}
/**
* Sets the security of the surface. Setting the flag is equivalent to creating the
* Surface with the {@link #SECURE} flag.
*/
public void setSecure(boolean isSecure) {
checkNotReleased();
if (isSecure) {
nativeSetFlags(mNativeObject, SECURE, SECURE);
} else {
nativeSetFlags(mNativeObject, 0, SECURE);
}
}
/*
* set display parameters.
* needs to be inside open/closeTransaction block
*/
/**
* Describes the properties of a physical display known to surface flinger.
*/
public static final class PhysicalDisplayInfo {
public int width;
public int height;
public float refreshRate;
public float density;
public float xDpi;
public float yDpi;
public boolean secure;
public long appVsyncOffsetNanos;
public long presentationDeadlineNanos;
public PhysicalDisplayInfo() {
}
public PhysicalDisplayInfo(PhysicalDisplayInfo other) {
copyFrom(other);
}
@Override
public boolean equals(Object o) {
return o instanceof PhysicalDisplayInfo && equals((PhysicalDisplayInfo)o);
}
public boolean equals(PhysicalDisplayInfo other) {
return other != null
&& width == other.width
&& height == other.height
&& refreshRate == other.refreshRate
&& density == other.density
&& xDpi == other.xDpi
&& yDpi == other.yDpi
&& secure == other.secure
&& appVsyncOffsetNanos == other.appVsyncOffsetNanos
&& presentationDeadlineNanos == other.presentationDeadlineNanos;
}
@Override
public int hashCode() {
return 0; // don't care
}
public void copyFrom(PhysicalDisplayInfo other) {
width = other.width;
height = other.height;
refreshRate = other.refreshRate;
density = other.density;
xDpi = other.xDpi;
yDpi = other.yDpi;
secure = other.secure;
appVsyncOffsetNanos = other.appVsyncOffsetNanos;
presentationDeadlineNanos = other.presentationDeadlineNanos;
}
// For debugging purposes
@Override
public String toString() {
return "PhysicalDisplayInfo{" + width + " x " + height + ", " + refreshRate + " fps, "
+ "density " + density + ", " + xDpi + " x " + yDpi + " dpi, secure " + secure
+ ", appVsyncOffset " + appVsyncOffsetNanos
+ ", bufferDeadline " + presentationDeadlineNanos + "}";
}
}
public static void setDisplayPowerMode(IBinder displayToken, int mode) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
nativeSetDisplayPowerMode(displayToken, mode);
}
public static SurfaceControl.PhysicalDisplayInfo[] getDisplayConfigs(IBinder displayToken) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
return nativeGetDisplayConfigs(displayToken);
}
public static int getActiveConfig(IBinder displayToken) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
return nativeGetActiveConfig(displayToken);
}
public static boolean setActiveConfig(IBinder displayToken, int id) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
return nativeSetActiveConfig(displayToken, id);
}
public static void setDisplayProjection(IBinder displayToken,
int orientation, Rect layerStackRect, Rect displayRect) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
if (layerStackRect == null) {
throw new IllegalArgumentException("layerStackRect must not be null");
}
if (displayRect == null) {
throw new IllegalArgumentException("displayRect must not be null");
}
nativeSetDisplayProjection(displayToken, orientation,
layerStackRect.left, layerStackRect.top, layerStackRect.right, layerStackRect.bottom,
displayRect.left, displayRect.top, displayRect.right, displayRect.bottom);
}
public static void setDisplayLayerStack(IBinder displayToken, int layerStack) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
nativeSetDisplayLayerStack(displayToken, layerStack);
}
public static void setDisplaySurface(IBinder displayToken, Surface surface) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
if (surface != null) {
synchronized (surface.mLock) {
nativeSetDisplaySurface(displayToken, surface.mNativeObject);
}
} else {
nativeSetDisplaySurface(displayToken, 0);
}
}
public static void setDisplaySize(IBinder displayToken, int width, int height) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
if (width <= 0 || height <= 0) {
throw new IllegalArgumentException("width and height must be positive");
}
nativeSetDisplaySize(displayToken, width, height);
}
public static IBinder createDisplay(String name, boolean secure) {
if (name == null) {
throw new IllegalArgumentException("name must not be null");
}
return nativeCreateDisplay(name, secure);
}
public static void destroyDisplay(IBinder displayToken) {
if (displayToken == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
nativeDestroyDisplay(displayToken);
}
public static IBinder getBuiltInDisplay(int builtInDisplayId) {
return nativeGetBuiltInDisplay(builtInDisplayId);
}
/**
* Copy the current screen contents into the provided {@link Surface}
*
* @param display The display to take the screenshot of.
* @param consumer The {@link Surface} to take the screenshot into.
* @param width The desired width of the returned bitmap; the raw
* screen will be scaled down to this size.
* @param height The desired height of the returned bitmap; the raw
* screen will be scaled down to this size.
* @param minLayer The lowest (bottom-most Z order) surface layer to
* include in the screenshot.
* @param maxLayer The highest (top-most Z order) surface layer to
* include in the screenshot.
* @param useIdentityTransform Replace whatever transformation (rotation,
* scaling, translation) the surface layers are currently using with the
* identity transformation while taking the screenshot.
*/
public static void screenshot(IBinder display, Surface consumer,
int width, int height, int minLayer, int maxLayer,
boolean useIdentityTransform) {
screenshot(display, consumer, new Rect(), width, height, minLayer, maxLayer,
false, useIdentityTransform);
}
/**
* Copy the current screen contents into the provided {@link Surface}
*
* @param display The display to take the screenshot of.
* @param consumer The {@link Surface} to take the screenshot into.
* @param width The desired width of the returned bitmap; the raw
* screen will be scaled down to this size.
* @param height The desired height of the returned bitmap; the raw
* screen will be scaled down to this size.
*/
public static void screenshot(IBinder display, Surface consumer,
int width, int height) {
screenshot(display, consumer, new Rect(), width, height, 0, 0, true, false);
}
/**
* Copy the current screen contents into the provided {@link Surface}
*
* @param display The display to take the screenshot of.
* @param consumer The {@link Surface} to take the screenshot into.
*/
public static void screenshot(IBinder display, Surface consumer) {
screenshot(display, consumer, new Rect(), 0, 0, 0, 0, true, false);
}
/**
* Copy the current screen contents into a bitmap and return it.
*
* CAVEAT: Versions of screenshot that return a {@link Bitmap} can
* be extremely slow; avoid use unless absolutely necessary; prefer
* the versions that use a {@link Surface} instead, such as
* {@link SurfaceControl#screenshot(IBinder, Surface)}.
*
* @param sourceCrop The portion of the screen to capture into the Bitmap;
* caller may pass in 'new Rect()' if no cropping is desired.
* @param width The desired width of the returned bitmap; the raw
* screen will be scaled down to this size.
* @param height The desired height of the returned bitmap; the raw
* screen will be scaled down to this size.
* @param minLayer The lowest (bottom-most Z order) surface layer to
* include in the screenshot.
* @param maxLayer The highest (top-most Z order) surface layer to
* include in the screenshot.
* @param useIdentityTransform Replace whatever transformation (rotation,
* scaling, translation) the surface layers are currently using with the
* identity transformation while taking the screenshot.
* @param rotation Apply a custom clockwise rotation to the screenshot, i.e.
* Surface.ROTATION_0,90,180,270. Surfaceflinger will always take
* screenshots in its native portrait orientation by default, so this is
* useful for returning screenshots that are independent of device
* orientation.
* @return Returns a Bitmap containing the screen contents, or null
* if an error occurs. Make sure to call Bitmap.recycle() as soon as
* possible, once its content is not needed anymore.
*/
public static Bitmap screenshot(Rect sourceCrop, int width, int height,
int minLayer, int maxLayer, boolean useIdentityTransform,
int rotation) {
// TODO: should take the display as a parameter
IBinder displayToken = SurfaceControl.getBuiltInDisplay(
SurfaceControl.BUILT_IN_DISPLAY_ID_MAIN);
return nativeScreenshot(displayToken, sourceCrop, width, height,
minLayer, maxLayer, false, useIdentityTransform, rotation);
}
/**
* Like {@link SurfaceControl#screenshot(int, int, int, int, boolean)} but
* includes all Surfaces in the screenshot.
*
* @param width The desired width of the returned bitmap; the raw
* screen will be scaled down to this size.
* @param height The desired height of the returned bitmap; the raw
* screen will be scaled down to this size.
* @return Returns a Bitmap containing the screen contents, or null
* if an error occurs. Make sure to call Bitmap.recycle() as soon as
* possible, once its content is not needed anymore.
*/
public static Bitmap screenshot(int width, int height) {
// TODO: should take the display as a parameter
IBinder displayToken = SurfaceControl.getBuiltInDisplay(
SurfaceControl.BUILT_IN_DISPLAY_ID_MAIN);
return nativeScreenshot(displayToken, new Rect(), width, height, 0, 0, true,
false, Surface.ROTATION_0);
}
private static void screenshot(IBinder display, Surface consumer, Rect sourceCrop,
int width, int height, int minLayer, int maxLayer, boolean allLayers,
boolean useIdentityTransform) {
if (display == null) {
throw new IllegalArgumentException("displayToken must not be null");
}
if (consumer == null) {
throw new IllegalArgumentException("consumer must not be null");
}
nativeScreenshot(display, consumer, sourceCrop, width, height,
minLayer, maxLayer, allLayers, useIdentityTransform);
}
}