程序包 ohos.agp.graphics

类 TextureHolder

java.lang.Object

ohos.agp.graphics.TextureHolder

public class TextureHolder
extends Object

Captures frames from an image stream as an texture.

The image stream may come from either camera preview or video decode. A Surface created from a TextureHolder can be used as an output destination for the image stream.

从以下版本开始:

3

嵌套类概要

嵌套类

限定符和类型	类	说明
static interface	TextureHolder.OnNewFrameCallback	Interface definition for being notified that a new stream frame is available.

构造器概要

构造器

构造器	说明
TextureHolder(int texName)	Default constructor used to create a TextureHolder instance by using the default attribute set and style.

方法概要

限定符和类型	方法	说明
void	abandon()	Releases all buffers managed by this TextureHolder.
void	bindToGPUContext(int texName)	Binds this TextureHolder to the GPU context, that is, the openGL context.
void	freeTextureImage()	Releases the texture image of the TextureHolder.
long	getLastRefreshTextureImageTime()	Obtains the timestamp when TextureHolder#refreshTextureImage() was last called, in nanoseconds.
boolean	getMatrixForTransform(float[] matrix)	Obtains the 4x4 matrix for texture image transformation.
boolean	isAbandoned()	Checks whether buffers managed by TextHolder have all been released.
void	refreshTextureImage()	Updates the texture image to the latest image streams.
void	setBufferDimension(int width, int height)	Sets the size of the image buffer.
void	setOnNewFrameCallback(TextureHolder.OnNewFrameCallback callback)	Sets a callback to listen for whether new image frames are available.
void	unbindFromGPUContext()	Unbinds this TextureHolder from the GPU context.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

TextureHolder

public TextureHolder(int texName)

Default constructor used to create a TextureHolder instance by using the default attribute set and style.

方法详细资料

bindToGPUContext

public void bindToGPUContext(int texName)

Binds this TextureHolder to the GPU context, that is, the openGL context.

参数:

texName - Indicates the texture name defined by the openGL API.

从以下版本开始:

3

unbindFromGPUContext

public void unbindFromGPUContext()

Unbinds this TextureHolder from the GPU context.

从以下版本开始:

3

freeTextureImage

public void freeTextureImage()

Releases the texture image of the TextureHolder.

从以下版本开始:

3

refreshTextureImage

public void refreshTextureImage()

Updates the texture image to the latest image streams.

从以下版本开始:

3

setBufferDimension

public void setBufferDimension(int width,
                               int height)

Sets the size of the image buffer.

参数:

width - Indicates the buffer width.

height - Indicates the buffer height.

从以下版本开始:

3

getMatrixForTransform

public boolean getMatrixForTransform(float[] matrix)

Obtains the 4x4 matrix for texture image transformation.

参数:

matrix - Indicates the array storing the 4x4 matrix.

返回:

Returns true if get the Matrix for Transform; returns false otherwise.

从以下版本开始:

3

setOnNewFrameCallback

public void setOnNewFrameCallback(TextureHolder.OnNewFrameCallback callback)

Sets a callback to listen for whether new image frames are available.

参数:

callback - Indicates the callback to set. If this parameter is null, the callback that has been set by this method will be deleted.

从以下版本开始:

3

abandon

public void abandon()

Releases all buffers managed by this TextureHolder.

从以下版本开始:

3

isAbandoned

public boolean isAbandoned()

Checks whether buffers managed by TextHolder have all been released.

返回:

Returns true if all buffers are released; returns false otherwise.

从以下版本开始:

5

getLastRefreshTextureImageTime

public long getLastRefreshTextureImageTime()

Obtains the timestamp when TextureHolder#refreshTextureImage() was last called, in nanoseconds.

返回:

Returns the timestamp when TextureHolder#refreshTextureImage() was last called.

从以下版本开始:

5