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Add API to copy a window

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Change-Id: I9bb5209010db6665be4b6f8db81a6fc1b7debc45
This commit is contained in:
John Reck
2016-09-01 09:44:09 -07:00
parent 51c1b3466a
commit 9580146f50
10 changed files with 190 additions and 18 deletions
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139
graphics/java/android/view/PixelCopy.java
View File

@ -18,8 +18,11 @@ package android.view;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.os.Handler;
import android.view.ViewTreeObserver.OnDrawListener;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
@ -104,6 +107,32 @@ public final class PixelCopy {
request(source.getHolder().getSurface(), dest, listener, listenerThread);
}
/**
* Requests for the display content of a {@link SurfaceView} to be copied
* into a provided {@link Bitmap}.
*
* The contents of the source will be scaled to fit exactly inside the bitmap.
* The pixel format of the source buffer will be converted, as part of the copy,
* to fit the the bitmap's {@link Bitmap.Config}. The most recently queued buffer
* in the SurfaceView's Surface will be used as the source of the copy.
*
* @param source The source from which to copy
* @param srcRect The area of the source to copy from. If this is null
* the copy area will be the entire surface. The rect will be clamped to
* the bounds of the Surface.
* @param dest The destination of the copy. The source will be scaled to
* match the width, height, and format of this bitmap.
* @param listener Callback for when the pixel copy request completes
* @param listenerThread The callback will be invoked on this Handler when
* the copy is finished.
*/
public static void request(@NonNull SurfaceView source, @Nullable Rect srcRect,
@NonNull Bitmap dest, @NonNull OnPixelCopyFinishedListener listener,
@NonNull Handler listenerThread) {
request(source.getHolder().getSurface(), srcRect,
dest, listener, listenerThread);
}
/**
* Requests a copy of the pixels from a {@link Surface} to be copied into
* a provided {@link Bitmap}.
@ -122,12 +151,40 @@ public final class PixelCopy {
*/
public static void request(@NonNull Surface source, @NonNull Bitmap dest,
@NonNull OnPixelCopyFinishedListener listener, @NonNull Handler listenerThread) {
request(source, null, dest, listener, listenerThread);
}
/**
* Requests a copy of the pixels at the provided {@link Rect} from
* a {@link Surface} to be copied into a provided {@link Bitmap}.
*
* The contents of the source rect will be scaled to fit exactly inside the bitmap.
* The pixel format of the source buffer will be converted, as part of the copy,
* to fit the the bitmap's {@link Bitmap.Config}. The most recently queued buffer
* in the Surface will be used as the source of the copy.
*
* @param source The source from which to copy
* @param srcRect The area of the source to copy from. If this is null
* the copy area will be the entire surface. The rect will be clamped to
* the bounds of the Surface.
* @param dest The destination of the copy. The source will be scaled to
* match the width, height, and format of this bitmap.
* @param listener Callback for when the pixel copy request completes
* @param listenerThread The callback will be invoked on this Handler when
* the copy is finished.
*/
public static void request(@NonNull Surface source, @Nullable Rect srcRect,
@NonNull Bitmap dest, @NonNull OnPixelCopyFinishedListener listener,
@NonNull Handler listenerThread) {
validateBitmapDest(dest);
if (!source.isValid()) {
throw new IllegalArgumentException("Surface isn't valid, source.isValid() == false");
}
if (srcRect != null && srcRect.isEmpty()) {
throw new IllegalArgumentException("sourceRect is empty");
}
// TODO: Make this actually async and fast and cool and stuff
int result = ThreadedRenderer.copySurfaceInto(source, dest);
int result = ThreadedRenderer.copySurfaceInto(source, srcRect, dest);
listenerThread.post(new Runnable() {
@Override
public void run() {
@ -136,6 +193,86 @@ public final class PixelCopy {
});
}
/**
* Requests a copy of the pixels from a {@link Window} to be copied into
* a provided {@link Bitmap}.
*
* The contents of the source will be scaled to fit exactly inside the bitmap.
* The pixel format of the source buffer will be converted, as part of the copy,
* to fit the the bitmap's {@link Bitmap.Config}. The most recently queued buffer
* in the Window's Surface will be used as the source of the copy.
*
* Note: This is limited to being able to copy from Window's with a non-null
* DecorView. If {@link Window#peekDecorView()} is null this throws an
* {@link IllegalArgumentException}. It will similarly throw an exception
* if the DecorView has not yet acquired a backing surface. It is recommended
* that {@link OnDrawListener} is used to ensure that at least one draw
* has happened before trying to copy from the window, otherwise either
* an {@link IllegalArgumentException} will be thrown or an error will
* be returned to the {@link OnPixelCopyFinishedListener}.
*
* @param source The source from which to copy
* @param dest The destination of the copy. The source will be scaled to
* match the width, height, and format of this bitmap.
* @param listener Callback for when the pixel copy request completes
* @param listenerThread The callback will be invoked on this Handler when
* the copy is finished.
*/
public static void request(@NonNull Window source, @NonNull Bitmap dest,
@NonNull OnPixelCopyFinishedListener listener, @NonNull Handler listenerThread) {
request(source, null, dest, listener, listenerThread);
}
/**
* Requests a copy of the pixels at the provided {@link Rect} from
* a {@link Window} to be copied into a provided {@link Bitmap}.
*
* The contents of the source rect will be scaled to fit exactly inside the bitmap.
* The pixel format of the source buffer will be converted, as part of the copy,
* to fit the the bitmap's {@link Bitmap.Config}. The most recently queued buffer
* in the Window's Surface will be used as the source of the copy.
*
* Note: This is limited to being able to copy from Window's with a non-null
* DecorView. If {@link Window#peekDecorView()} is null this throws an
* {@link IllegalArgumentException}. It will similarly throw an exception
* if the DecorView has not yet acquired a backing surface. It is recommended
* that {@link OnDrawListener} is used to ensure that at least one draw
* has happened before trying to copy from the window, otherwise either
* an {@link IllegalArgumentException} will be thrown or an error will
* be returned to the {@link OnPixelCopyFinishedListener}.
*
* @param source The source from which to copy
* @param srcRect The area of the source to copy from. If this is null
* the copy area will be the entire surface. The rect will be clamped to
* the bounds of the Surface.
* @param dest The destination of the copy. The source will be scaled to
* match the width, height, and format of this bitmap.
* @param listener Callback for when the pixel copy request completes
* @param listenerThread The callback will be invoked on this Handler when
* the copy is finished.
*/
public static void request(@NonNull Window source, @Nullable Rect srcRect,
@NonNull Bitmap dest, @NonNull OnPixelCopyFinishedListener listener,
@NonNull Handler listenerThread) {
validateBitmapDest(dest);
if (source == null) {
throw new IllegalArgumentException("source is null");
}
if (source.peekDecorView() == null) {
throw new IllegalArgumentException(
"Only able to copy windows with decor views");
}
Surface surface = null;
if (source.peekDecorView().getViewRootImpl() != null) {
surface = source.peekDecorView().getViewRootImpl().mSurface;
}
if (surface == null || !surface.isValid()) {
throw new IllegalArgumentException(
"Window doesn't have a backing surface!");
}
request(surface, srcRect, dest, listener, listenerThread);
}
private static void validateBitmapDest(Bitmap bitmap) {
// TODO: Pre-check max texture dimens if we can
if (bitmap == null) {