HardwareBuffer

BLOB

public static final int BLOB

Format: opaque format used for raw data transfer; must have a height of 1

Constant Value: 33 (0x00000021)

DS_24UI8

public static final int DS_24UI8

Format: 24 bits depth, 8 bits stencil

Constant Value: 50 (0x00000032)

DS_FP32UI8

public static final int DS_FP32UI8

Format: 32 bits depth, 8 bits stencil

Constant Value: 52 (0x00000034)

D_16

public static final int D_16

Format: 16 bits depth

Constant Value: 48 (0x00000030)

D_24

public static final int D_24

Format: 24 bits depth

Constant Value: 49 (0x00000031)

D_FP32

public static final int D_FP32

Format: 32 bits depth

Constant Value: 51 (0x00000033)

RGBA_10101010

public static final int RGBA_10101010

Format: 10 bits each red, green, blue, alpha

Constant Value: 59 (0x0000003b)

RGBA_1010102

public static final int RGBA_1010102

Format: 10 bits each red, green, blue, 2 bits alpha

Constant Value: 43 (0x0000002b)

RGBA_8888

public static final int RGBA_8888

Value is RGBA_8888, RGBA_FP16, RGBA_1010102, RGBX_8888, RGB_888, RGB_565, BLOB, YCBCR_420_888, D_16, D_24, DS_24UI8, D_FP32, DS_FP32UI8, S_UI8, YCBCR_P010, R_8, R_16, RG_1616, or RGBA_10101010

Constant Value: 1 (0x00000001)

RGBA_FP16

public static final int RGBA_FP16

Format: 16 bits each red, green, blue, alpha

Constant Value: 22 (0x00000016)

RGBX_8888

public static final int RGBX_8888

Format: 8 bits each red, green, blue, alpha, alpha is always 0xFF

Constant Value: 2 (0x00000002)

RGB_565

public static final int RGB_565

Format: 5 bits each red and blue, 6 bits green, no alpha

Constant Value: 4 (0x00000004)

RGB_888

public static final int RGB_888

Format: 8 bits each red, green, blue, no alpha

Constant Value: 3 (0x00000003)

RG_1616

public static final int RG_1616

Format: 16 bits each red, green. When sampled on the GPU this is represented as an unsigned integer instead of implicit unsigned normalize. For more information see https://www.khronos.org/opengl/wiki/Normalized_Integer

Constant Value: 58 (0x0000003a)

R_16

public static final int R_16

Format: 16 bits red. When sampled on the GPU this is represented as an unsigned integer instead of implicit unsigned normalize. For more information see https://www.khronos.org/opengl/wiki/Normalized_Integer

Constant Value: 57 (0x00000039)

R_8

public static final int R_8

Format: 8 bits red

Constant Value: 56 (0x00000038)

S_UI8

public static final int S_UI8

Format: 8 bits stencil

Constant Value: 53 (0x00000035)

USAGE_COMPOSER_OVERLAY

public static final long USAGE_COMPOSER_OVERLAY

The buffer will be used as a hardware composer overlay layer. That is, it will be displayed using the system compositor via SurfaceControl This flag is currently only needed when using SurfaceControl.Transaction.setBuffer(SurfaceControl, HardwareBuffer) to set a buffer. In all other cases, the framework adds this flag internally to buffers that could be presented in a composer overlay.

Constant Value: 2048 (0x0000000000000800)

USAGE_CPU_READ_OFTEN

public static final long USAGE_CPU_READ_OFTEN

Usage: The buffer will often be read by the CPU

Constant Value: 3 (0x0000000000000003)

USAGE_CPU_READ_RARELY

public static final long USAGE_CPU_READ_RARELY

Value is either 0 or a combination of USAGE_CPU_READ_RARELY, USAGE_CPU_READ_OFTEN, USAGE_CPU_WRITE_RARELY, USAGE_CPU_WRITE_OFTEN, USAGE_GPU_SAMPLED_IMAGE, USAGE_GPU_COLOR_OUTPUT, USAGE_COMPOSER_OVERLAY, USAGE_PROTECTED_CONTENT, USAGE_VIDEO_ENCODE, USAGE_GPU_DATA_BUFFER, USAGE_SENSOR_DIRECT_DATA, USAGE_GPU_CUBE_MAP, USAGE_GPU_MIPMAP_COMPLETE, and USAGE_FRONT_BUFFER

Constant Value: 2 (0x0000000000000002)

USAGE_CPU_WRITE_OFTEN

public static final long USAGE_CPU_WRITE_OFTEN

Usage: The buffer will often be written to by the CPU

Constant Value: 48 (0x0000000000000030)

USAGE_CPU_WRITE_RARELY

public static final long USAGE_CPU_WRITE_RARELY

Usage: The buffer will sometimes be written to by the CPU

Constant Value: 32 (0x0000000000000020)

USAGE_FRONT_BUFFER

public static final long USAGE_FRONT_BUFFER

Usage: The buffer is used for front-buffer rendering. When front-buffering rendering is specified, different usages may adjust their behavior as a result. For example, when used as USAGE_GPU_COLOR_OUTPUT the buffer will behave similar to a single-buffered window. When used with USAGE_COMPOSER_OVERLAY, the system will try to prioritize the buffer receiving an overlay plane & avoid caching it in intermediate composition buffers.

Constant Value: 4294967296 (0x0000000100000000)

USAGE_GPU_COLOR_OUTPUT

public static final long USAGE_GPU_COLOR_OUTPUT

Usage: The buffer will be written to by the GPU

Constant Value: 512 (0x0000000000000200)

USAGE_GPU_CUBE_MAP

public static final long USAGE_GPU_CUBE_MAP

Usage: The buffer will be used as a cube map texture

Constant Value: 33554432 (0x0000000002000000)

USAGE_GPU_DATA_BUFFER

public static final long USAGE_GPU_DATA_BUFFER

Usage: The buffer will be used as a shader storage or uniform buffer object

Constant Value: 16777216 (0x0000000001000000)

USAGE_GPU_MIPMAP_COMPLETE

public static final long USAGE_GPU_MIPMAP_COMPLETE

Usage: The buffer contains a complete mipmap hierarchy

Constant Value: 67108864 (0x0000000004000000)

USAGE_GPU_SAMPLED_IMAGE

public static final long USAGE_GPU_SAMPLED_IMAGE

Usage: The buffer will be read from by the GPU

Constant Value: 256 (0x0000000000000100)

USAGE_PROTECTED_CONTENT

public static final long USAGE_PROTECTED_CONTENT

Usage: The buffer must not be used outside of a protected hardware path

Constant Value: 16384 (0x0000000000004000)

USAGE_SENSOR_DIRECT_DATA

public static final long USAGE_SENSOR_DIRECT_DATA

Usage: The buffer will be used for sensor direct data

Constant Value: 8388608 (0x0000000000800000)

USAGE_VIDEO_ENCODE

public static final long USAGE_VIDEO_ENCODE

Usage: The buffer will be read by a hardware video encoder

Constant Value: 65536 (0x0000000000010000)

YCBCR_420_888

public static final int YCBCR_420_888

Format: Planar YCbCr 420; must have an even width and height

Constant Value: 35 (0x00000023)

YCBCR_P010

public static final int YCBCR_P010

Android YUV P010 format.

Constant Value: 54 (0x00000036)

CREATOR

public static final Creator<HardwareBuffer> CREATOR

close

public void close ()

Destroys this buffer immediately. Calling this method frees up any underlying native resources. After calling this method, this buffer must not be used in any way.

create

public static HardwareBuffer create (int width, 
                int height, 
                int format, 
                int layers, 
                long usage)

Creates a new HardwareBuffer instance.

Calling this method will throw an IllegalStateException if format is not a supported Format type.

describeContents

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

getFormat

public int getFormat ()

Returns the @Format of this buffer.

getHeight

public int getHeight ()

Returns the height of this buffer in pixels.

getId

public long getId ()

Returns the system-wide unique id for this buffer This can be useful as a cache key for associating additional objects with a given HardwareBuffer, such as associating an imported EGLImage with the target HardwareBuffer when processing a stream of buffers from ImageReader. This can also be useful for doing cross-process buffer caching. As sending a HardwareBuffer over Binder is slower than sending a long, this can be used as reliable cache key after an initial handshake that passes the HardwareBuffers themselves to later be referred to using only the id.

getLayers

public int getLayers ()

Returns the number of layers in this buffer.

getUsage

public long getUsage ()

Returns the usage flags of the usage hints set on this buffer.

getWidth

public int getWidth ()

Returns the width of this buffer in pixels.

isClosed

public boolean isClosed ()

Indicates whether this buffer has been closed. A closed buffer cannot be used in any way: the buffer cannot be written to a parcel, etc.

isSupported

public static boolean isSupported (int width, 
                int height, 
                int format, 
                int layers, 
                long usage)

Queries whether the given buffer description is supported by the system. If this returns true, then the allocation may succeed until resource exhaustion occurs. If this returns false then this combination will never succeed.

writeToParcel

public void writeToParcel (Parcel dest, 
                int flags)

Flatten this object in to a Parcel.

Calling this method will throw an IllegalStateException if close() has been previously called.

finalize

protected void finalize ()

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. A subclass overrides the finalize method to dispose of system resources or to perform other cleanup.

The general contract of finalize is that it is invoked if and when the Java virtual machine has determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, except as a result of an action taken by the finalization of some other object or class which is ready to be finalized. The finalize method may take any action, including making this object available again to other threads; the usual purpose of finalize, however, is to perform cleanup actions before the object is irrevocably discarded. For example, the finalize method for an object that represents an input/output connection might perform explicit I/O transactions to break the connection before the object is permanently discarded.

The finalize method of class Object performs no special action; it simply returns normally. Subclasses of Object may override this definition.

The Java programming language does not guarantee which thread will invoke the finalize method for any given object. It is guaranteed, however, that the thread that invokes finalize will not be holding any user-visible synchronization locks when finalize is invoked. If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates.

After the finalize method has been invoked for an object, no further action is taken until the Java virtual machine has again determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, including possible actions by other objects or classes which are ready to be finalized, at which point the object may be discarded.

The finalize method is never invoked more than once by a Java virtual machine for any given object.

Any exception thrown by the finalize method causes the finalization of this object to be halted, but is otherwise ignored.