程序包 ohos.agp.render

类 PixelMapHolder

java.lang.Object

ohos.agp.render.PixelMapHolder

public class PixelMapHolder
extends Object

Provides container for PixelMap.

PixelMap is the decoded image data. PixelMapHolder uses PixelMap to generate data required by the rendering backend, and provides the data as the input parameters for methods in Canvas.

从以下版本开始:

2

构造器概要

构造器

构造器	说明
PixelMapHolder(PixelMap pixelMap)	Creates a object based on a PixelMap source.

方法概要

限定符和类型	方法	说明
PixelMap	getPixelMap()	Obtains the PixelMap object in a container.
void	release()	Clears the PixelMap object in PixelMapHolder when no image needs to be rendered, and releases the backend rendering data in the container.
void	resetPixelMap(PixelMap pixelMap)	Resets the PixelMap object stored in a container.
void	uploadTexture()	Upload the image texture to the GPU in advance to speed up image display.

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

PixelMapHolder

public PixelMapHolder(PixelMap pixelMap)

Creates a object based on a PixelMap source.

参数:

pixelMap - Indicates the image to be drawn on the object.

方法详细资料

uploadTexture

public void uploadTexture()

Upload the image texture to the GPU in advance to speed up image display. It is best to call it when the interface is static to avoid application freezes.

从以下版本开始:

4

另请参阅:

Image.setPixelMapHolder(PixelMapHolder)

getPixelMap

public PixelMap getPixelMap()

Obtains the PixelMap object in a container.

返回:

Returns the PixelMap object stored in the container.

resetPixelMap

public void resetPixelMap(PixelMap pixelMap)

Resets the PixelMap object stored in a container.

The PixelMapHolder updates the backend rendering data when the PixelMap object stored in it is reset.

参数:

pixelMap - Indicates the decoded image data.

release

public void release()

Clears the PixelMap object in PixelMapHolder when no image needs to be rendered, and releases the backend rendering data in the container.

resetPixelMap(ohos.media.image.PixelMap) must be called to use the same PixelMapHolder again.