程序包 ohos.agp.graphics

接口 SurfaceOps

public interface SurfaceOps

Provides methods of adding or removing a callback for a surface Ops.

This interface is implemented by users.

从以下版本开始:

3

嵌套类概要

嵌套类

限定符和类型	接口	说明
static interface	SurfaceOps.Callback	Represents the callback of the surface ops.

方法概要

限定符和类型	方法	说明
void	addCallback(SurfaceOps.Callback callback)	Adds the callback of a surface ops.
Surface	getSurface()	Obtains the surface held by the surface ops.
Rect	getSurfaceDimension()	Obtains the dimension of this surface.
Canvas	lockCanvas()	Locks the Canvas of a surface ops to enable drawing on the canvas.
void	removeCallback(SurfaceOps.Callback callback)	Removes the callback of a surface ops.
void	setFixedSize(int width, int height)	Sets a fixed size for the surface.
void	setFormat(int format)	Sets the pixel format of the surface.
void	setKeepScreenOn(boolean isOn)	Sets whether the screen is always on.
void	unlockCanvasAndPost(Canvas canvas)	Releases a lockCanvas() instance and displays it on the screen.

方法详细资料

addCallback

void addCallback(SurfaceOps.Callback callback)

Adds the callback of a surface ops.

参数:

callback - Indicates the callback of the surface ops.

removeCallback

void removeCallback(SurfaceOps.Callback callback)

Removes the callback of a surface ops.

参数:

callback - Indicates the callback of the surface ops.

setFormat

void setFormat(int format)

Sets the pixel format of the surface.

参数:

format - Indicates the pixel format of the surface.

lockCanvas

Canvas lockCanvas()

Locks the Canvas of a surface ops to enable drawing on the canvas.

返回:

Returns the canvas of the surface ops.

unlockCanvasAndPost

void unlockCanvasAndPost(Canvas canvas)

Releases a lockCanvas() instance and displays it on the screen.

参数:

canvas - Indicates the canvas to release.

getSurface

Surface getSurface()

Obtains the surface held by the surface ops.

返回:

Returns the surface held by the surface ops.

setFixedSize

void setFixedSize(int width,
                  int height)

Sets a fixed size for the surface.

参数:

width - Indicates the width of the surface.

height - Indicates the height of the surface.

从以下版本开始:

3

setKeepScreenOn

void setKeepScreenOn(boolean isOn)

Sets whether the screen is always on.

参数:

isOn - Specifies whether the screen is always on. True indicates that the screen is always on; False indicates that the screen is not always on.

从以下版本开始:

3

getSurfaceDimension

Rect getSurfaceDimension()

Obtains the dimension of this surface.

返回:

Returns a Rect object describing the surface dimension. The values of left and top in this object are always 0.

从以下版本开始:

3