harmony 鸿蒙OH_NativeImage

  • 2022-10-28
  • 浏览 (884)

OH_NativeImage

概述

提供NativeImage功能,作为数据消费者,主要用来将数据和OpenGL纹理对接,需在OpenGL环境下使用

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

起始版本:

9

汇总

文件

名称 描述
native_image.h 定义获取和使用NativeImage的相关函数
引用文件:<native_image/native_image.h>
库:libnative_image.so

类型定义

名称 描述
OH_NativeImage 提供OH_NativeImage结构体声明
OHNativeWindow 提供对NativeWindow的访问功能

函数

名称 描述
OH_NativeImage_Create (uint32_t textureId, uint32_t textureTarget) 创建一个OH_NativeImage实例,该实例与OpenGL ES的纹理ID和纹理目标相关联
OH_NativeImage_AcquireNativeWindow (OH_NativeImage *image) 获取与OH_NativeImage相关联的OHNativeWindow指针. 该OHNativeWindow后续不再需要时需要调用
OH_NativeWindow_DestroyNativeWindow释放
OH_NativeImage_AttachContext (OH_NativeImage *image, uint32_t textureId) 将OH_NativeImage实例附加到当前OpenGL ES上下文, 且该OpenGL ES纹理会绑定到
GL_TEXTURE_EXTERNAL_OES, 并通过OH_NativeImage进行更新
OH_NativeImage_DetachContext (OH_NativeImage *image) 将OH_NativeImage实例从当前OpenGL ES上下文分离
OH_NativeImage_UpdateSurfaceImage (OH_NativeImage *image) 通过OH_NativeImage获取最新帧更新相关联的OpenGL ES纹理
OH_NativeImage_GetTimestamp (OH_NativeImage*image) 获取最近调用OH_NativeImage_UpdateSurfaceImage的纹理图像的相关时间戳
OH_NativeImage_GetTransformMatrix (OH_NativeImage *image, float matrix[16]) 获取最近调用OH_NativeImage_UpdateSurfaceImage的纹理图像的变化矩阵
OH_NativeImage_Destroy (OH_NativeImage **image) 销毁通过OH_NativeImage_Create创建的OH_NativeImage实例, 销毁后该
OH_NativeImage指针会被赋值为空

类型定义说明

OH_NativeImage

typedef struct OH_NativeImage OH_NativeImage

描述:

提供OH_NativeImage结构体声明

OHNativeWindow

typedef struct NativeWindow OHNativeWindow

描述:

提供对NativeWindow的访问功能

函数说明

OH_NativeImage_AcquireNativeWindow()

OHNativeWindow* OH_NativeImage_AcquireNativeWindow (OH_NativeImage * image)

描述:

获取与OH_NativeImage相关联的OHNativeWindow指针. 该OHNativeWindow后续不再需要时需要调用

OH_NativeWindow_DestroyNativeWindow释放

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

参数:

名称 描述
image 指向OH_NativeImage实例的指针。

返回:

成功则返回一个指向OHNativeWindow实例的指针,否则返回NULL

OH_NativeImage_AttachContext()

int32_t OH_NativeImage_AttachContext (OH_NativeImage * image, uint32_t textureId )

描述:

将OH_NativeImage实例附加到当前OpenGL ES上下文, 且该OpenGL ES纹理会绑定到

GL_TEXTURE_EXTERNAL_OES, 并通过OH_NativeImage进行更新

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

参数:

名称 描述
image 指向OH_NativeImage实例的指针。
textureId OH_NativeImage要附加到的OpenGL ES纹理的id。

返回:

返回值为0表示执行成功

OH_NativeImage_Create()

OH_NativeImage* OH_NativeImage_Create (uint32_t textureId, uint32_t textureTarget )

描述:

创建一个OH_NativeImage实例,该实例与OpenGL ES的纹理ID和纹理目标相关联

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

参数:

名称 描述
textureId OpenGL ES的纹理ID,OH_NativeImage实例会与之相关联
textureTarget OpenGL ES的纹理目标

返回:

返回一个指向OH_NativeImage实例的指针 returns NULL otherwise

OH_NativeImage_Destroy()

void OH_NativeImage_Destroy (OH_NativeImage ** image)

描述:

销毁通过OH_NativeImage_Create创建的OH_NativeImage实例, 销毁后该

OH_NativeImage指针会被赋值为空

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

参数:

名称 描述
image 指向OH_NativeImage实例的指针。

OH_NativeImage_DetachContext()

int32_t OH_NativeImage_DetachContext (OH_NativeImage * image)

描述:

将OH_NativeImage实例从当前OpenGL ES上下文分离

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

参数:

名称 描述
image 指向OH_NativeImage实例的指针。

返回:

返回值为0表示执行成功

OH_NativeImage_GetTimestamp()

int64_t OH_NativeImage_GetTimestamp (OH_NativeImage * image)

描述:

获取最近调用OH_NativeImage_UpdateSurfaceImage的纹理图像的相关时间戳

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

参数:

名称 描述
image 指向OH_NativeImage实例的指针。

返回:

返回纹理图像的相关时间戳

OH_NativeImage_GetTransformMatrix()

int32_t OH_NativeImage_GetTransformMatrix (OH_NativeImage * image, float matrix[16] )

描述:

获取最近调用OH_NativeImage_UpdateSurfaceImage的纹理图像的变化矩阵

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

参数:

名称 描述
image 指向OH_NativeImage实例的指针。
matrix 用来存储要获取的4*4的变化矩阵。

返回:

返回值为0表示执行成功

OH_NativeImage_UpdateSurfaceImage()

int32_t OH_NativeImage_UpdateSurfaceImage (OH_NativeImage * image)

描述:

通过OH_NativeImage获取最新帧更新相关联的OpenGL ES纹理

\@syscap SystemCapability.Graphic.Graphic2D.OH_NativeImage

参数:

名称 描述
image 指向OH_NativeImage实例的指针。

返回:

返回值为0表示执行成功

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